Friday, November 29, 2019

In case you never thought about it before... free essay sample

Have you ever noticed how ugly the word ugly is? It is only used when describing something repulsive or undesirable. The world as a whole shys away from the word. Nobody wants to be ugly. This fact is utterly important. You see, I do not believe in ugly. Ugly, does not exist. The problem with the world today is the increasing number of blind people. Now, when I say blind, I am not referring to those with vision problems per say. To me, people who are blind, are people who do not use their eyes. If everyone in the world were not too busy shoving their faces in their cell phones, televisions, and laptops, the number of blind people would indefinitely decrease. I believe that the most important organs in the body are the eyes, ears, and brain. Here is my hypothesis: If you open your eyes, you will begin to see the beauty that exists in everything. We will write a custom essay sample on In case you never thought about it before or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page By opening your ears, you will find that listening is the greatest tool of them all. If you open up your mind, you can accomplish wisdom over knowledge. But if you open all three, the world will never cease to amaze you. The problem today is that we talk more than we listen, we think more than we act, and we hate more than we love. Appreciation for the life we have been given is something I have seen declining over my few years here. It seems as though the most important letter to every individual is the letter I. This fact seems significantly unimportant, except when I point out that it comes before the letter U in the alphabet. What I am saying, is that I comes before U. I before You. I may not be a person of great achievement. I have not accomplished anything internationally recognized. However, the previous statements bring me to my next hypothesis: Human beings are instinctually selfish creatures, and the desire to help others, in most cases, comes only when the benefit exceeds the cost. I have presented you with two different hypotheses, based not by measurable data, but solely by observation and experience. I have yet to experience a life time of experiences. That is obvious in itself, seeing as I am only a seventeen-year-old girl. I have, in the most simplest of terms, lived. I know myself enough to say that I believe that I have the gift of sight and listening. I have the ability to find the beauty in everything I come by, and as hard as it may be to do at times, I can listen more than I speak. Wisdom, to me, is when you put your knowledge into action, and is something I have yet to achieve. Wisdom, in my opinion, is a skill learned over time, time I have yet to come by. I have no regrets, no mistakes. I only live with learning experiences. While this essay is for my application to your school, I need you to consider this: I have done wrong, because perfection, in my eyes, cannot exist. Who I am is not a list of numbers, and is not my seemingly lack-thereof list of extra-curricular activities. Let me tell you who I am. My name is Brice Lilith Geddes, and I am seventeen-years-old. My one goal in life is to positively benefit someone else’s life, no matter what the cost, through the method of open eyes, listening ears, and wisdom beyond my years. Give me the chance to show you what I can bring to your school, the people in it, and ultimately the world. I have the ability to make an impact, but for now, I am happy where I am. I would not waste your or my time if I wanted otherwise, but I will make the best of what you ultimately decide. This brings me to my last hypothesis for consideration: There is a cause and effect to everything, and everything happens for a reason. Ultimately, however, there are no ordinary moments.

Monday, November 25, 2019

Engr. Essay Example

Engr. Essay Example Engr. Essay Engr. Essay water, farm inputs, micro climate, environment, machines and machine related parameters for optimum production of crop and animals (Engr. A.O. Ani 2010) Over the years, as a result of the illiteracy on the part of people in the third worldâ„ ¢s nations, there has been a misconception on the difference between agriculture and farmingâ„ ¢. According to Encarta encyclopedia, Agriculture: farming, is the occupation, business, or science of cultivating the land, producing crops, and raising livestock. Some say farming refers to the growing of crops while agriculture is a general name for all farm activities including the cultivation of land for the growing of crops and rearing of animals. The misconception was due to the use of other unexplained (which were misunderstood by the uneducated individuals) agricultural terminologies like fishery, processing, and deforestation etcetera. Precision Agriculture is the application of technologies and principles to manage spatial and temporal variability associated with all aspects of agricultural production for improving production and environmental quality. The success in precision agriculture depends on the accurate assessment of the variability, its management and evaluation in space-time distribution in crop production. The agronomic success of precision agriculture has been quite convincing in crops like sugar beet, sugarcane, tea and coffee. The potential for economic, environmental and social benefits of precision agriculture is largely unrealized because the space-time distribution of crop production has not been adequately addressed. Precision agriculture is a relatively new area that combines the latest in geographic technology with cropping situations to optimize inputs, reduce waste, and generate the maximum possible yields. The technology often involves the use of GPS and remote sensing for data collection, GIS for data processing and analysis, and variable rate technology for implementing ideal models. 1.1.2 NATURAL RESOURCES VARIABILITY: Soil and landscape variability, digital elevation models, soil mapping, geostatistics, geographic information systems, microclimate, weather forecasting, remote sensing, management units, scale, etc. 1.1.3 MANAGING VARIABILITY: Sampling techniques, site-specific nutrient and crop protection chemical recommendation, crop quality, tillage, seed density, seed variety, yield mapping, remote sensing, record keeping systems, data interpretation and use, crops (corn, wheat, sugar beets, potatoes, peanut, cotton, vegetables, etc.), management scale, etc. 1.1.4 ENGINEERING TECHNOLOGY: Computers, positioning systems, DGPS, machinery, tillage, planting, nutrient and crop protection implements, manure, irrigation, fustigation, yield monitor and mapping, soil physical and chemical characteristic sensors, weed/pest mapping, etc. 1.1.5 PROFITABILITY: MEY, net returns, BMPs, optimum recommendations, crop quality, technology cost, sustainability, social impacts, marketing, cooperatives, farm scale, crop type, etc. 1.1.6 ENVIRONMENT: Nutrient, crop protection chemicals, sediments, leaching, runoff, practices, field, watershed, on/off farm, artificial drainage, ground water, surface water, etc. 1.1.7 TECHNOLOGY TRANSFER: Skill needs, education, training, outreach, methods, surveys, agri-business, producers, distance education, Internet, simulations models, decision support systems, expert systems, on-farm experimentation, partnerships, quality of rural life, etc. 1.1.8 YIELD FORECASTING: Plant tissue absorbs much of the red light band and is very reflective of energy in near infrared (NIR) wavebands. The ratio of these two bands is referred to as the vegetation index (VI). The difference of red and NIR measurements divided by their sum is normalized difference VI (NDVI). For crops such as grain sorghum, production yields, leaf area index (LAI), crop height and biomass have been correlated with NDVI data obtained from multispectral images (Anderson et al, 1996). In order to get reasonably accurate yield predictions this data must be combined with input from weather models during the growing season (Moran et al, 1997). 1.1.9 MANAGEMENT DECISION SUPPORT SYSTEMS: Just having information about variability within the field doesnt solve any problems unless there is some kind of decision support system (DSS) in order to make VRT recommendations. Russo and Dantinne (Russo et al, 1997) have suggested the following steps for a DSS: 1. Identify environmental and biological states and processes in the field that can be monitored and manipulated for the betterment of crop production. 2. Choose sensors and supporting equipment to record data on these states and processes. 3. Collect, store and communicate the field-recorded data. 4. Process and manipulate the data into useful information and knowledge. 5. Present the information and knowledge in a form that can be interpreted to make decisions. Choose an action associated with a decision to change the identified state or process in a way that makes it more favorable to profitable crop production. 1.1.10 WHO IS FARMERS EDGE Farmers Edge offers a complete land management solution regardless if you are a 2000ac producer or a large corporate farm. ?   From project development to crop planning to operations and harvest management, Farmers Edge is dedicated to improving farmers land management practice by providing growers with solutions that increases their profits. Our land management solutions and services include advanced agronomy â€Å" a balance of traditional agronomy and new technology, soils analysis, carbon aggregation, traceability and in-season crop monitoring and record keeping. 1.2.0 PRECISION FARMING TECHNOLOGIES Precision farming basically depends on measurement and understanding of variability, the main components of precision farming system must address the variability. Precision farming technology enabled, information based and decision focused, the components include,(the enabling technologies) Remote Sensing (RS), Geographical Information System (GIS), Global Positioning System (GPS), Soil Testing, Yield Monitors and Variable Rate Technology. Precision farming requires the requisition, management, analysis and output of large amount of spatial and temporal data. Mobile computing systems were needed to function on the go in farming operations because desktop systems in the farm office were not sufficient. Because precision farming is concerned with spatial and temporal variability and it is information based and decision focused. It is the spatial analysis capabilities of GIS that enable precision agriculture. GPS, DGPS has greatly enabled precision farming and of great importance to pre cision farming, particularly for guidance and digital evaluation modeling position accuracies at the centimeter level are possible in DGPS receivers. Precision farming technology (PF) is designed to provide data and information to assist farmers when making site-specific management decisions. By making more informed management decisions, farmers can become more efficient, and perhaps lower costs, and become more profitable. However, little is known about how farmers use PF to make management decisions, identify production problems, and about the relative magnitude of benefits and costs of PF on individual farms. 1.2.1 The global positioning system; The global positioning system (GPS) is a network of satellites developed for and managed by the U.S. Defense Department. The GPS constellation of 24 satellites orbiting the earth, transmit precise satellite time and location information to ground receivers. The ground receiving units are able to receive this location information from several satellites at a time for use in calculating a triangulation fix thus determining the exact location of the receiver. 1.2.2 Geographical information system; A geographical information system (GIS) consists of a computer software data base system used to input, store, retrieve, analyze, and display, in map like form, spatially referenced geographical information. Fig fig.1. A GIS chart showing the network link 1.2.3 Yield monitors; Yield monitors are crop yield measuring devices installed on harvesting equipment. The yield data from the monitor is recorded and stored at regular intervals along with positional data received from the GPS unit. GIS software takes the yield data and produces yield maps. | Fig.2. a representation of a yield map on a GIS system 1.2.4 VARIABLE RATE TECHNOLOGY; Variable rate technology (VRT) consists of farm field equipment with the ability to precisely control the rate of application of crop inputs and tillage operations. Precision farming technologies have been commercially available since the early 1990s, but the pace of adoption among U.S. farmers has been modest. This study examines the relationship between the adoption of diagnostic and application techniques of precision farming and sources of information available to farmers about precision farming. The model used in the analysis accounts for sources of self-selection in the adoption process that could bias the results. Results indicate interpersonal information sources have increased adoption relative to information from the mass media, and the private sector has been the driving force behind the diffusion of precision farming. Information from crop consultants and input suppliers has had the greatest impact on the adoption of precision farming technologies. These sources likely provide the greatest technical expertise about precision farming, and thus are better equipped to ease the significant human capital requirement of precision farming t echnologies. Fig. 3. Showing an automated precision maching carrying out a variable rate command. 1.3.0GLOBAL ADOPTION OF PRECISION AGRICULTURE TECHNOLOGIES The adoption of precision agriculture technologies has been uneven, both geographically andtemporally. The economic theory of induced innovation predicts that new technologies will be developed and adopted where they make more efficient use of the scarcest productiveresources. Indeed, adoption of precision agriculture technologies has been fastest where labouris costly but land and capital are relatively less costly. Where precision agriculture is beingadopted, the uneven adoption rate is tied to normal cycles for replacing the expensivemachinery in which many precision agriculture technologies are embodied. Equipmentreplacement decisions are affected by many factors exogenous to the farm, such as bankinterest rates and commodity prices. Adoption is likely to continue in labor-scarce, land-abundant countries, with rates of adoption accelerating when commodity prices are high andinterest rates low. Although spatial precision agriculture (PA) encompasses four key information technologies, farmers tend to use it in one of two major ways. The four PA technologies include location determination (via the Global Positioning System, GPS), computerized geographicinformation systems (GIS), computer-guided controllers for variable rate application (VRA)of crop inputs, and sensing technologies for automated data collection and mapping. TheGPS and GIS technologies underpin both of the major PA practices that farmers have begunto adopt. One of these is nutrient management; it involves spatially referenced soil sampling, often linked to VRA fertilizer spreading. The other is yield monitoring, usually tied to yieldmapping. In North America adoption is emerging for variants of these, such as VRA seedingand pesticide spraying, as well as remote sensing of plant vigor (Daberkow and McBride,2000). Some farmers adopt technology while others do not, due to different reasons. Either way, the pattern of PAtechnology adoption has been uneven. Despite the rapid growth of global commerce and thewidespread availability of equipment for VRA and yield monitoring, adoption rates appear todiffer sharply from one country to another, at least based on the informal data available (Norton and Swinton, 2001). Yield monitors are being adopted rapidly in Argentina, but lessso in Brazil or in France. Site-specific fertilizer use is rare in Argentina, despite the growth ofyield monitor use (Lowenberg-DeBoer, 1999). In Malaysia, site-specific fertilization is beingapplied to rubber plantations, but not to rice fields. Even within a country such as the UnitedStates, PA adoption rates vary by a factor of ten from 11.3% of farms in the MidwesternHeartland to only 1.1% in the Southeastern Seaboard in 1998 (Daberkow and McBride,2000). In general, we observe that in favored areas adoption of yield m onitoring or VRAfertilization has surpassed 5 percent only in the United States and Canada. It would appearthat adoption rates in the 1-5 percent range (again, only for favored subregions) may pertaining Australia, Brazil, Denmark, United Kingdom, and Germany. With the exception of a fewyield monitors in South Africa and some VRA fertilization in isolated plantation agricultureenclaves, adoption of PA technologies is virtually unknown in Africa.Rate of adoption is not smoothJudging from trends observed in the United States, PA technology adoption is uneven notonly geographically, but also temporally. The uneven adoption trendcontrasts sharply with the rapid, smooth adoption of hybrid maize following its commercial introduction about 80 years ago (Griliches, 1957; Lowenberg-DeBoer, 1998). Given thepotential benefits of precision agriculture for farm profitability and environmental protection, these uneven adoption patterns may seempuzzling.Agricultural technologies can be viewed as means by which farmers seek to achieve theirproduction objectives. Farmers have many objectives, including risk management, quality oflife, and environmental stewardship. But for the majority of farmers, who rely on agriculturalincome, expected profitability is the sine qua non, they must earn enough to stay in business.In attempting to produce profitably, farmers are constrained by limited access to essential productive resources such as land, labor, equipment, buildings, and management knowledge. Two characteristics are likely to drive the adoption of PA technologies. First, considering thatthey improve the efficiency of input use in mechanized agriculture, they are likely to beadopted first in those places where input use is already relatively efficient. Second, becausethese technologies use costly capital to automate human information processing, they will bemost attractive where capital is abundant relative to management labor. 1.4 0 A BRIEF HISTORY OF WORLD PRECISION FARMING Ever since man appeared on the earth, he has been harnessing the natural resources to meet his basic requirements. Reference to soil, water and air as basic resources, their management and means to keep them pure are mentioned in the Vedas, Upanishads and in ancient Hindu literature. The phenomenal increase in population of both man and animal in the last century and fast growing industrialization and urbanization in last few decades have overstrained the natural resource base, which are getting degraded much faster than ever before. Thus, the attention of whole world is focused on how to increase production to feed the burgeoning population and the question uppermost in every ones mind is Can we produce enough food in a sustainable manner without damage to the natural resource base For over the last 15 years, precision agriculture has been practice in some parts of the world and despite its promising future, it has not yet managed to be adapted globally by farmers. To the Europeans, Precision Farming is old traditional farming in the modern way. Initially, precision farming took the form of a move away from blanket applications of inputs, increasing in sophistication as developments in technology advanced to enable variable application rates only applying fertilizer and chemicals where they are required and at the optimum rate. Generally, the adoption of precision farming has been modest in Europe as it is advancing to livestock precision application e.g. robotic milking of cattle and the possibility to determine the satisfaction rate of the beast using his mooâ„ ¢ sound. And also, the potential for using precision agriculture to address environmental, food safety, animal welfare and sustainability problems seems to be attracting political attention in Europe. Amongst all this good that have befalling upon the European system of agriculture, there are still some lapses in the southern part of Europe where only a few countries e.g. France, Sp ain, and Portugal have been very successful with breaking loose from their traditional pattern of agriculture. The Americanâ„ ¢s attitudes of doing things in a unique format have always paved a way for them around the blue globe. This is evident on their adoption of precision farming as they grow rapidly with the aim of input minimization and output maximization. Series of achievements have been made by the Americans within this few years of the emergence op precision agriculture the most striking of them all is the commissioning of a GPS system developed for and managed by the U.S. defense department. Precision farming in America has been very successful as it has been adopted by several countries especially Argentina, U.S.A., Columbia, Brazil, Chile, etcetera. Australian growers are finding practical and profitable uses for precision agriculture, but the uses differ somewhat from those common in the US. Yield monitoring is relatively common, but as in the US many yield monitors are not linked to global positioning systems (GPS). High soil testing costs have discouraged US style variable rate fertilizer and growers are searching for alternative ways to develop variable rate application (VRA) fertilizer recommendation maps. Because of severe soil compaction problems, GPS guidance for controlled traffic is considered by some to be the best starting point for precision agriculture. Asia, a world of science and technology, a place where at the mention of the word innovationâ„ ¢, one is welcomed as an ambassador of the jet age. In countries like Japan, small areas are utilized in farming by using greenhouses to plant crops and vegetables. Japanese farmers are equipped with skills in such a way that production can be done simultaneously, thus, making large production at small areas by as many farmers as possible. By this medium, the Japanese government has been able to lunch a campaign against hunger and corruption in the country. China, being the back bone of Asia technology growth as found a way to defy the might of the GPS scarcity their by reducing the problems of traffic in precision agriculture by the lunching of space satellites to manage field monitoring activities. Some great nations like Taiwan, Japan, China, Korea, and etcetera have found a way to embrace and manage precision farming for the betterment of their world. Africa being the most backward technologic-wise among all continents as just a little to show for precision farming. Some countries like South Africa and Zambia tops the chart of Nigeria precision farmers while other countries like Nigeria, Cameroon, Ghana, Kenya etcetera only applied some precision operations into mechanized farming. Precision farming as developed over the past decade, having is origin in Europe. As often the case with new technologies, this practice was taken up in the US and developed at great past. Precision farming is about to change the face of agriculture, as we know it today. Precision farming has been developed mainly in Europe (Moore 1998a). It has, however, been adapted by North American farmers in far greater numbers than in any other part of the world. Various sources show that probably around 90% of all precision farming system operates in US and Canada (Starck, 1998). 1.5.0 PRECISION FARMING IN NIGERIA Precision farming provides a new solution using a systems approach for todays agricultural issues such as the need to balance productivity with environmental concerns. It is based on advanced information technology. It includes describing and modeling variation in soils and plant species, and integrating agricultural practices to meet site-specific requirements. It aims at increased economic returns, as well as at reducing the energy input and the environmental impact of agriculture. This is very possible in Nigeria if only Nigerians will allow it be, putting together a combined effort to achieving the highest point of application of farming technologies. 1.5.1 A New Concept; This article is concentrated on the possibilities of the introduction of precision agriculture in Nigeria. Of a truth, there is no such thing as precision farming presently in Nigeria today because all there is are some elements of precision agriculture like the use of sensors and some field monitoring devices to manage crop yield, productivities, variation in soil nutrients and climatic changes as they affect food availabilities. For example in kwara state, yield monitors are been use to monitor the production of selenium production. This practice is been supported by kwara state government as a preferred way of site specific management. Actually, precision agriculture as a new concept In Nigeria if adapted will bring about a sudden transition from traditional farming (as practiced in most parts of Nigeria) to a better and more advanced level of farm variability management. This whole scenario will involve an experience of the term evolutionâ„ ¢ in its entirety. Apart from the self motivation required of Nigerians and monetary support on the part of the Nigeria government, there are other challenges faced by the nation that will militate against the introduction and proper functioning of precision farming in Nigeria. But before we delve into this sub problem proper, lets first take a look into the geography of Nigeria to see if the land his been favored by nature for this effect. 1.5.2 Precision Farming VS Traditional Farming; just like in a football match between Manchester united FC and Chelsea FC, there is absolutely no basis for comparism between both club teams because Chelsea f c is of no match for man u. precision agriculture have in time encompass traditional farming in all ratification. The advent of machine aided implement with precise application of variable technology to the farmland form the basis and justification of precision agriculture. Just as in the game of football, all the department of precision agriculture works more than those of traditional farming also called (which can either be hand-tool or draught- animal farming). also, the variation in quality, quantity and production factor differs a great deal. Never the less, tradition agriculture is the ancestor of precision agriculture and this is the more reason why Nigerians should embrace precision farming and move forward on the field. 1.6.0 GEOGRAPHY OF NIGERIA Nigeria, one-third larger than Texas and the most populous country in Africa, is situated on the Gulf of Guinea in West Africa. Its neighbors are Benin, Niger, Cameroon, and Chad. The lower course of the Niger River flows south through the western part of the country into the Gulf of Guinea. Swamps and mangrove forests border the southern coast; inland are hardwood forests. The first inhabitants of what is now Nigeria were thought to have been the Nok people (500 BC â€Å"c. AD 200). The Kanuri, Hausa, and Fulani peoples subsequently migrated there. Islam was introduced in the 13th century, and the empire of Kanem controlled the area from the end of the 11th century to the 14th. The Fulani Empire ruled the region from the beginning of the 19th century until the British annexed Lagos in 1851 and seized control of the rest of the region by 1886. It formally became the Colony and Protectorate of Nigeria in 1914. Nigeria has two broad belts of vegetation types, namely, the forest and savannah types. There is, however, also the mountain vegetation of the isolated high plateau regions in the central and far eastern parts of the country. Fig.4. a map of Nigeria showing the major towns and cities. The subhumid zone of Nigeria covers 455 000 km2 or approximately half of Nigeria and a third of the zone in West Africa. Typically low in carbon and nitrogen, the soils have a tendency to form hard crusts. They have a poor capacity for retaining nutrients, poor water penetration and shallow water tables, all of which adversely affect cropping potential. Rainfall in the zone ranges from 1000 to 1500 mm, with growing season from 180 to 300 days per year. The zone offers a wide variety of cropping options, but the growing season is invariably punctuated by dry spells. There is high runoff. During the growing season the humidity is conducive to pathogen survival and transmission. In the dry season the vegetation is subject to burning The zone has five vegetation subzones, but the Guinea and derived savanna subzones account for some 90% of the zone. There is good vegetation cover, although it is dominated by varieties suited to impoverished soil conditions. The feed quality of the grasses rises after the onset of the rains, but declines rapidly after they stop and is low for most of the year. The pattern of vegetation and land use form a mosaic of medium to high levels of cultivation, grassland and woodland. Twenty percent of the zone is cultivated, and cultivation is expanding at 4.8% per annum. It is estimated that by the turn of the century 33% will be cultivated. This estimate is well below the former one of 70%. Crop yields cannot be sustained on cleared land for more than 3 years without fertilizer or manure. There are opportunities for introducing forage legumes, but such interventions must be in accord with intricate and well established mixed cropping systems. The bigger the contribution of forage legumes to soil fertility and hence to food crop yields, the better the chances of their adoption. 1.6.1 Vegetation zones in Nigeria; Vegetation, simply defined, is the plant cover of the earth consisting of assemblages of plants. Broadly speaking, the national vegetation over a geographical area is essentially a response to the climate in that area. Nigerias vegetation belts reflect this very close link between vegetation and climate. Hence, the similarity in the west-to-east zonation of both climate and vegetation. With the south to north progressive decline in total rainfall and length of wet season, vegetation belts are demarcated on west-to-east zonation pattern characterized by transitional zones from one belt to another. The forest vegetation zone of Nigeria consists of; 1. Saline water swamp 2. Freshwater swamp 3. Tropical evergreen rainforest. While the savannah vegetation zone of Nigeria consist of; 1. Guinea Savannah 2. Sudan Savannah; and 3. Sahel Savannah. One major characteristic of savannah vegetation is that trees vary in size and density from the Guinea, through the Sudan, to the Sahel Savannah. If all this are as correct as they seem, then nature her self must have specially designed Nigeria as a country in a unique manner, giving her a format that will favor all manner of crop as their production possibility strength varies across the various vegetation zones. Also, the soil type distribution in Nigeria is in a unique format varying from sand to gravel in different parts of the country and this is one reason why the nation is very rich in minerals and natural resources. Putting all this together, it is evident that the Nigeria geography is by no means a factor or an excuse militating against the adoption and growth of precision farming with as its innovative ideas. 1.6.2 Geology More than half of the Nigerian subhumid zone is covered by Pre- to Upper Cambrian basement complex. It includes the oldest rocks known in Nigeria, principally composed of metamorphic and igneous material. Over most of the area underlain by basement complex there is a discontinuous mantle of weathered gneiss and granite, but this is generally thin, with a high clay content, and does not serve as an efficient aquifer. The water tables are shallow and adversely affect crops and cropping potentials at the height of the wet season. The soil tends to form a hard crust after the first rains, effectively preventing penetration of water and seedling emergence. It therefore needs tillage for cropping. Areas with excessively coarse materials, a poor capacity for retaining nutrients due to low cation exchange capacity, and topography exceeding 2-3% slope are normally avoided by farmers. Under the traditional production system long fallow periods are necessary for maintaining soil fertility. 1.6.3 Relief For an area covering half a million square kilometres, the variation in relief within the subhumid zone is limited. Four major relief types can be identified: The Niger-Benue trough is a Y-shaped lowland area which divides the subhumid zone into three parts. It has been deeply dissected by erosion into tabular hills separated by river valleys. The Niger section is especially rugged. The upland areas north of the Niger-Benue trough, and west of the Niger river, are generally undulating and strongly marked by inselbergs. The north-central plateau is made up of two different platforms the high plains of Hausaland, which at an average height of 600 m a.s.l form the first step, and the Jos Plateau at an elevation of between 1000 and 1800 m forming the second step. The latter falls outside the subhumid zone. The area south of the Benue and east of the Niger, extending eastwards as far as 9?30E, consists of the lowland Cross River plains, east of Enugu, which show outcrops of limestone and shales whereas the relief in general is gentle; and the scarplands west of Enugu, which are made up of the Udi and Awka-Orlu plateaux. 1.6.4 Sunshine and radiation The maximum seasonal variation in day length in Nigeria is 1 hour and 45 minutes. This variation is sufficient to cause differences in the performance of crops sensitive to photoperiodism. The mean annual number of hours of sunshine increases progressively to the northeast. The daily mean duration of sunshine in July, at the height of the rainy season, is greater in the north than in the south, where the cloud cover is more constant. The same pattern is observed in January, when there is a general lack of cloud cover in the north, but due to humid air from the Gulf of Guinea cloudiness may be expected in the south. This results in a marked zonal pattern when the whole of Nigeria is considered. The northern part of the subhumid zone stands out as having the highest national values of net radiation. Further to the north, outside the zone, surface albedo is higher, reducing net received radiation. 1.6.5 Rainfall Most of the Nigerian subhumid zone lies between the 1000 mm and 1500 mm isohyets, offering a wide choice of crop options. Rainfall is governed by the annual passage of the Inter-Tropical Convergence Zone (ITCZ), the meeting point of a dry northeastern low-pressure air mass and a moist southwestern high-pressure air mass. The northeastern movement of the ITCZ and the rain-bearing winds that accompany it mark the onset of the rainy season. Its southwestward movement and the accompanying harmattan winds mark the beginning of the dry season. Annual rainfall and its reliability decrease from the south northwards. The northern part of the zone has unimodal rainfall distribution in which rains increase in frequency and amount, beginning in May and peaking in August. In the southern part the rainfall pattern is bimodal, the first peak occurring in June-July, and the second in September, with August relatively dry. Variations in annual rainfall make it difficult to draw a strict geographical boundary between these two distribution patterns. Much of the subhumid zone is transitional between unimodal and bimodal rainfall distribution. The rains are expected to reach the southern boundary of the subhumid zone at the beginning of March, and the northern boundary 2 months later (Walter, 1968). At the northern boundary the rainy season normally ends in early October, and at the southern boundary 6 weeks later. The expected duration of the wet season in the subhumid zone thus ranges from 5 months in the north to more than 8 months in the south. Nevertheless the season (April to October) is invariably punctuated by dry spells, the length of which varies from a few days to a few weeks. Evapotranspiration exceeds rainfall north of latitude 7? °30N (Kowal and Knabe, 1972), although almost everywhere in the zone there appears to be a period of water surplus in the year when rainfall exceeds evapotranspiration. Rainfall is usually torrential, 25 to 50 mm or more often falling within 1 hour. Measurement of infiltration or rainfall acceptance on a ferruginous soil type using catchment gauges gave an average ultimate infiltration of 24 mm/hour. Rainfall exceeding this rate can cause serious erosion and runoff. High humidity and concentrated rainfall during the growing season are conducive to pathogen survival and transmission. The dry season, on the other hand, is severe and the vegetation becomes parched and easily combustible. 1.6.6 Major soil types Ferruginous tropical soils cover approximately half the Nigerian subhumid zone. These soils are generally characterized by a sandy surface horizon overlying a weakly structured clay accumulation. Their base-exchange capacity is low, but their base saturation and pH values are relatively high. They have high natural fertility, and FAO (1966) rates them as having good potential. However, under traditional management practices ferruginous tropical soils are of low productivity, are sensitive to erosion and have low water-holding capacity. The alluvial soils found along the Niger and Benue rivers show light accumulations of organic matter but are often, under traditional management practices, too wet during the rainy season for crops other than rice. Under improved management practices, including irrigation and drainage, these soils have been classified by FAO (1966) as having strong to good potential, depending on their local texture and salt content. The ferralsols that occupy much of the other half of Nigerias subhumid zone are deep, strongly weathered soils of friable consistency. They have a low base-exchange capacity, low pH values and generally low nutrient contents. However, their resistance to erosion and good physical properties make these soils suitable for a wide range of crops. The ferralsols within the subhumid zone are categorized by FAO as soils of low present productivity, but as having medium potential if their management can be improved. The lithosols found in the north-central part of the zone are of local significance only, and have been classified by FAO as being of variable productivity and potential. Under traditional management they are dry for 6 to 8 months of the year. In addition they are shallow, moderately leached with little organic matter, and have a low base-exchange capacity. The vertisols found in a small area west of Yola are difficult to work under traditional management practices. They crack deeply when dry, and have a heavy dark texture when moist. They are therefore of only medium productivity, in spite of being generally high in nutrients. Under improved management practices, FAO classifies these soils as having good potential. The soil properties in ILCAs case study areas are shown in Table 1. Table 1. General soil properties in two ILCA case study areas. Location | pH | Organic C (% | Total N (%) | Available P (ppm) | Ca (Meg/100 g) | Mg (Meg/100 g) | Mn (Meg/100 g) | K (Meg/100 g) | Total acidity | Kurmin Biri | 5.2 | 0.58 | 0.071 | 3.9 | 1.12 | 0.37 | 0.02 | 0.13 | 0.78 | Abet | 5.3 | 0.36 | 0.086 | 1.8 | 1.04 | 0.49 | 0.11 | 0.13 | 0.46 | 1.6.7 Vegetation and land use; The subhumid zone includes five vegetation subzones, excluding those found at high altitude. The Guinea and derived savanna subzones occupy some 90% of the area. The areas of Nigeria where mans influence on the vegetation is greatest lie to the north and south of the subhumid zone, exemplified by conditions in the Sahel and by the diminishing rain forest. Blair-Rains (1968) stated that the existing vegetation in Nigeria in general may bear little resemblance to the original zonal categories, because of the combined effects of human activity: burning, cultivation, tree felling and cattle grazing. Extensive areas of medium to high levels of land-use intensity are found on the northern border of the subhumid zone extending northwards, with the highest cultivation density being associated with major towns. The same pattern is found on the southern border, around Enugu, and southwards, where the proportion of land cultivated reaches its highest, at 25%. The land in between these two areas falls within the subhumid zone, where cultivation declines to some 17%. Here the pattern of vegetation and land use can best be described as a mosaic of varying levels of cultivation, grassland and woodland. An interconnecting patchwork of more intense cultivation links the northern and southern cultivated regions of Nigeria, through a broad belt north of Lokoja including Bida, Minna, Abuja, Lafia, Shendam, Kafanchan, the Jos Plateau, Kaduna and Saminaka. In this belt, cultivation reaches a peak of 35%. To the west and east of it, cultivated areas are generally more scattered (10%) with woodland tending to predominate. 1.6.8 Distribution of cultivation Bourn and Milligan (1983) estimated 20% of the Nigerian subhumid zone to be under cultivation. The overall distribution of this farmland, and hence the intensity of land use, are represented by the three-dimensional surface shown in Figure 1, in which the proportion of land under cultivation is indicated by apparent height. As already suggested by the side-looking airborne radar (SLAR) vegetation and land-use map, cultivation was found to be unevenly distributed within the subhumid zone, being concentrated in a series of semi-isolated peaks of high-intensity land use, surrounded by areas of relatively low cultivation. However, an important feature indicated in Figure 1 but not evident on the SLAR map is that cultivation is taking place throughout the surveyed area, albeit at very low levels in the more western areas and to the southeast. Putt et al (1980) have demonstrated a rapid rate of agricultural expansion, associated with human population increase, both within and outside the subhumid zone. In the Lafia region, for example, comparative airphoto-interpretation indicated that cultivation was expanding at an annual rate of 4.8%. Assuming continued expansion at that rate (plus or minus 1%) and an estimated 20% of the zone to be cultivated at present, Figure 2 projects the increasing proportion likely to be under cultivation to the turn of the century. Even the higher estimate of 33.1% under cultivation is very much below the previous estimate of 70% for the zone as a whole (ILCA, 1979). Since approximately one third of the West African sub humid zone is in Nigeria, the figure of 70% would appear to be an overestimate. Fig.5. showing the distribution of cultivation 1.6.9 Forage resources; The herbaceous cover of the subhumid zone consists mainly of annual grasses, with a very low percentage of native legumes. Seasonal changes in herbage quality are primarily due more to changes in plant development than to climatic conditions per se. The C4 photosynthetic pathways in grasses promote a rapid accumulation of structural components, resulting in dilution of nutrients such as N and P in the tissue. Legumes on the other hand, exhibit a less efficient C3 photosynthetic pathway and are independent of soil N. which is secured through biological fixation in the root nodules. Legumes are therefore usually higher in protein and minerals and have higher dry matter (DM) digestibility and voluntary intake by animals than do grasses at similar stages of growth. Growing forage legumes should thus provide a means of overcoming the protein deficiency of the grasses which dominate natural feed supplies. 1.6.10Forage productivity; 1.6.10.1 Measurement Land-use patterns affect the productivity of natural forage. Because of its favourable rainfall the subhumid zone is also likely to be increasingly utilized for cropping wherever edaphic and other conditions are favourable. Forage productivity measurements were carried out in two environments where pastoralists are settling: 1. An intensive arable farming area (Abet). 2. An area reserved by the state for grazing (Kurmin Biri Kachia). An inventory, and the frequency, of existing flora in the herbaceous cover were compiled by using line transects. A number of transects were read in three distinct ecological niches in each study area. Potential yield of the herbaceous strata of the three ecological subdivisions was estimated from five samples of 1 m2 each, clipped to ground level at the beginning and end of the rains, within a 5 x 5 m enclosed area protected from livestock throughout the growing season. Monthly forage production and botanical composition were also estimated from 1 m2 samples, clipped to the ground within similar enclosures as above, but moved randomly after each monthly clipping. Weight difference or DM disappearance between clipped samples from within and outside the enclosures was assumed to have been grazed by livestock during that month. Cut samples, hand-separated into grass and non-grass (forb), were taken, dried and analysed for crude protein (CP) and DM digestibility. Data collected from the three ecological subdivisions were pooled to construct a generalized pattern of forage production in the subhumid zone (Figures 3 and 4). One season of uninterrupted growth of the herbaceous stratum in a burnt area in the subhumid zone produced a DM yield of 2250 kg on shallow, ferruginous soils. Fadama (lowland) soils, with deep hydromorphology, tend to support higher DM productivity up to 5 tonnes in one growing season (Table 2). On this soil type forage growth is prolonged by residual moisture long after the rains have ceased (Figure 5). Fig.6 Table 2. One seasons DM production (kg/ha)a/ of the herbaceous layer in different eco-subsystems in two study areas of the subhumid zone of Nigeria. | Fadama | Woodland | Scrubland | Riverine | Kurmin Biri | 3754 | 1758 | 2251 | 2156 | Abet | 4922 | | 2185 | 1940 | a/ Uninterrupted growth. Herbage growth and production varies seasonally, and the maximum herbaceous biomass on offer is attained between August-September (Figures 3 and 4). Seasonality of production also affects non-graminoid components, and their proportion in the total biomass is higher at the beginning of the rainy season (Table 3). Non-graminaceous types are insignificant in the herbaceous layer, especially in burnt areas. Productivity of the herbaceous cover also varies between years. Herbage produced in the fadama at Abet was about 1 tonne higher in 1981 when the area received 167 mm more rain than the previous year. Both seasonal and species differences contribute to changes in forage quality. During their early development grasses increase in protein content. Where conditions are favourable, the release of soil nitrogen early in the growing season may increase their CP to 9%. But once the rains are over CP content declines rapidly, and since the main bulk of forage on offer is grass, the overall nutritive value of the herbaceous cover in terms of protein is low for most of the year. Table 3. Botanical composition of the herbaceous layer of two ILCA case study areas in the subhumid zone of Nigeria (kg/ha). Study area/Months | Grass | Forb | Total | % Forb | Kurmin Biri | January | 612 | | 612 | | February | 504 | | 504 | | March | 144 | 76 | 220 | 34 | April | 288 | 172 | 460 | 37 | May | 714 | 206 | 920 | 22 | June | 1573 | 301 | 1874 | 16 | July | 1799 | 368 | 2162 | 17 | August | 2298 | 431 | 2729 | 16 | September | 2380 | 437 | 2817 | 18 | October | 1980 | 386 | 2366 | 16 | November | 1200 | 285 | 1485 | 19 | December | 826 | 165 | 991 | 20 | Abet | January | 1382 | | 1382 | | February | 322 | | 322 | | March | 290 | | 290 | | April | 518 | 93 | 611 | 15 | May | 910 | 203 | 1113 | 18 | June | 1502 | 328 | 1830 | 18 | July | 2193 | 166 | 2359 | 7 | August | 2811 | 189 | 3000 | 6 | September | 3094 | 226 | 3320 | 7 | October | 2729 | 218 | 2947 | 7 | November | 2688 | 163 | 2851 | 6 | December | 2212 | 94 | 2306 | 4 | The digestibility of grass is low throughout the year (Figures 3 and 4). It exceeds 40% for only 4 months during the growing season, when the tissues are tender. Digestibility changes closely follow the level of protein in the tissue (Figure 6). This correlation highlights the importance of increasing protein levels in the forage. Fig. 7 Livestock, through selective grazing, tend to consume a better quality diet than average protein and digestibility levels would suggest. Analyses of grab samples collected by following animals showed higher protein content and digestibility throughout the year (Figure 7). The overall quality of forage from a burnt area was also higher. Burning as early as October-November increased the quality of regrown forage, but the bulk left at the end of the growing season was very low in quality and therefore less utilized by livestock, which prefer the new flush of shoots induced by burning (Figures 3 and 4). fig. 8. Indications are that forage utilization in more intensively farmed areas is higher than in other areas, possibly because of the tendency of pastoralists to settle near arable farmers. 1.6.11Forage composition and availability The sub humid zone has good ground vegetative cover. Empty spaces in any area account for 8 to 17%, depending on the type of soil, available moisture and the level of land use. Grasses make up about 62 to 82% of the total herbaceous forage. Leguminous species are very low. Other short-growing dicots, associated with grass, make up about 10 to 20% of herbaceous cover (Table 4). Table 4. Composition of the herbaceous cover of three eco-subsystems of the subhumid zone (%). | Eco-subsystem | Plant cover | Fadama | Scrubland | Riverine | Total plant cover | 92.1 | 83.7 | 83.2 | Grass | 82.0 | 64.2 | 62.3 | Legumes | 0.7 | 4.4 | 1.4 | Others | 9.4 | 15.1 | 19.5 | On the basis of percentage frequency, Rattray (1960) used a given grass genus that emerged as the dominating type to designate a particular climatic zone. Accordingly, the subhumid zone of West Africa could be divided into three belts that cross the south-north axis: the Pennisetum, Hyparrhenia and Andropogon belts. These dominant species have given way to others over the years, doubtless as a result of human influence. The graminoid types in both the ILCA study areas are dominated by Loudetia simplex, which is a tufted perennial, suggesting impoverished soil conditions (Table 5). Table 5. Frequency distribution of the major grasses in the herbaceous cover of the Kachia Grazing Reserve. Grasses | Occurrence (%) | Andropogon spp. | 6.2 | Brachiaria spp. | 8.3 | Digitaria spp. | 0.8 | Hyparrhenia spp. | 11.4 | Loudetia spp. | 40.7 | Panicum spp. | 0.8 | Paspalum spp. | 1.4 | Setaria spp. | 0.6 | 1.6.12Forage constraints and interventions 1.6.12.1Cropland Land cleared and prepared for cropping has an unprotected surface and therefore deteriorates rapidly under the impact of the torrential rains typical of the subhumid zone. Clearing increases surface runoff and leaching of nutrients. Moreover, the temperature of an unprotected soil surface tends to be higher, which encourages more rapid decomposition of organic matter than in a soil with a natural vegetative cover. Soil undergoing degradation at such a rate cannot support continuous cropping unless its lost properties are restored in some way. When such a soil is cropped repeatedly, crop yields decline and the capacity of the land to support human life diminishes with time (Table 6). Experienced farmers are able to predict the time limit for profitable cropping once an area is cleared, which generally ranges from 1 to 3 years unless manure or fertilizer is applied. Table 6. Productivity of sorghum (kg/ha) when cropped for 3 years continuously with or without manure additions (Kurmin Biri, 1981-1983)a/. ?   | Year | | 1981 | 1982 | 1983b/ | Without animal manure | | | | | Grain yield | 858 | 690 | 267 | | Crop residue | 4330 | 3740 | 2133 | With animal manure | | | | | Grain yield | | 1352 | 933 | | Crop residue | | 5710 | 4000 | Each replicate in the trial was divided into two, and 20 to 30 animals were confined for 5 days on one half, prior to land preparation in 1982 and 1983. b/ In 1983 there was a very short wet season compared with previous years. Soil fertility is traditionally restored by fallowing. The length of time the soil is rested after cropping is generally a function of population pressure. Where population is low, rest periods between cultivated phases may be prolonged, resulting in a low cropping index. In this system a farmer has to clear a new area for cultivation each time he abandons the old one. Soil restoration is left to take a natural but prolonged course with no inputs from the farmer. Areas with a low cropping index can provide reasonably well regenerated land whenever this is required by farmers, Higher population levels make prolonged fallow periods less feasible. Farmers are obliged to return to a previously cropped area much sooner. Incomplete recovery then has to be compensated by additional inputs to make the soil productive. The return of ash, household sweepings, night soil and, of course, fertilizers to the land are some of the measures used. For the farmers in parts of Nigerias sub humid zone, access to manure plays a very significant role in the maintenance of soil fertility with or without short rest periods. Manure allows intensive cropping and hence higher human support capacity per unit area of land. Crop and livestock production are commonly carried out by ethnically separate communities, although mixed farming is increasing in Nigeria. Fulani pastoralists prefer to settle in the vicinity of cereal farmers, who thus have access to manure even if they do not own livestock themselves. Animals can also be used for traction and transport, besides being a source of much needed protein. For all the contributions of livestock, the crop sector at the moment tends to offer only crop residues and unimproved fallows in return. Although valuable to livestock early in the dry season (Paper 14), crop residues alone are inadequate to meet the nutritional demands of animals. Growing cereal crops and forage legumes in a mixture is a recent concept in African agriculture. Both components in the mixture require a different production emphasis (grain from cereals and hence emphasis on the reproductive phase, but herbage from legumes, and hence emphasis on the vegetative stage). The agronomic requirements of a cereal/forage crop mixture differ from those of other conventional crop mixtures. Research carried out by ILCA in the past 3 years indicates that forage legumes can be incorporated into existing cropping systems by simple adjustments of sowing time, plant densities or planting sequences. These adjustments improve the nutritive value of crop residues and hence the economic returns per unit area of land. Mixed cropping is the basic farming practice in the sub humid zone of Nigeria. Sorghum is the principal crop and predominates in the different crop mixtures. Most commonly, it is intercropped with soybean and/or maize, but various other crops, such as groundnut, cowpea, millet, and okra, also feature. Farmers reasons for growing a mixture of crops are to minimize risk, spread labour inputs, and reduce disease problems (Evans, 1960; Norman, 1974). These advantages outweigh the benefits of sole cropping, and mixed cropping will doubtlessly remain the standard practice in the sub humid zone for the foreseeable future. Yield advantages in mixed as compared to sole cropping are also common when the component crops complement each other. This happens when their growth patterns differ in time, so that each crop makes its major demands on resources at different times (Wiley, 1979). It will be possible to incorporate forage legumes into crop mixtures only if appropriate adjustments can be made to cropping patterns. These adjustments should not be too far removed from the existing practices if they are to be adopted easily by the farmers. 1.6.12.2Rangeland Natural forage provides the cheapest source of nutrients for ruminants, but the land on which it grows does not often have a high capacity for biomass production. The deflected or disclimax vegetations typical of such land are also likely to increase with the spread of human activity into areas which are as yet underutilized. These areas will not revert back to climax floral associations whilst under continued pressure from man and stock. Livestock grazing natural rangeland derive most of their feed from grasses, with browse becoming increasingly important (but never dominant) as the dry season progresses. High costs and the communal ownership of rangeland preclude large-scale pasture development in Nigerias subhumid zone. Unrestricted access and widespread burning have so far frustrated conventional range management strategies. Small units of sown forage might nevertheless be respected on private property just as cereal crops are. The Fulani in the ILCA case study areas have traditionally sown fonio (Digitaria exilis) on areas grazed and trodden by cattle. This technique can be adapted to provide the labour required for legume establishment. Small units are probably a safer investment than large ones, owing to the risk of fire. 2.0 CHALLENGES Now, letâ„ ¢s take a look at the various potential challenges militating against the practice of sustainable precision farming in Nigeria. This set backs are numerously as large as the nation herself but can be grouped into various broad classes as discussed below; 2.1Socio-psychological challenges: being the most critical among the various problems faced by not only precision agriculture but by farming in general, socio-psychology talks about the mind- set of the people about a given concept. In Nigeria today, farming is been perceive as a dirty job since the advent of the so called petroleum which is seen as a white collar job (office job) and as taken over the consciousness of the people. Also, people radar work in an air-conditioning office and receive a low income than aspiring for a better economy in the farming sector. Food scarcity is attaining its climax as hunger, death, and diseases as taking over the peace and unity of the states yet we still wallow in in-depth ignorance. Also, looking at the name farmingâ„ ¢ which is the mother name of agricultureâ„ ¢ has been neglected just for the reason of acceptance by the ignorant nation. In most learning institutions in Nigeria, names have been changed from agricultural engineering to b iological engineering, bioresources engineering, and etcetera for the senseless reason of rebranding. We talk about enlightening the nation but yet we live in the shadows of our fear for a world full of politics. We bear a name national association of agricultural engineer (NIAE)â„ ¢ yet we allow the chuckles of fear obtain the better part of us without considering properly what fate in the future have for us. There is no crime on becoming the vibrant minorities were the voice of the people is to be heard and acknowledge for his stronger will and love for his mother land. If proper precautions are not taken, the name agricultural engineersâ„ ¢ will be erased from the pages of history. The economy of Nigeria historically was based on agriculture, and about 70% of the workforce is still engaged in farming (largely of a subsistence type). The chief crops are cocoa, peanuts, palm oil, corn, rice, sorghum, millet, soybeans, cassava, yams, and rubber. In addition, cattle, sheep, goats, and pigs are raised. But nowadays, Petroleum is the leading mineral produced in Nigeria and provides about 95% of foreign exchange earnings and the majority of government revenues. With oil as a basic source of income for the nation, the government as loosed interest in the farming and everything that concerns the agricultural sector. Now what will be the fate of precision farming in a country where the government pays little or no interest in agriculture 2.2Land tenure system: land ownership and land fragmentization is yet another common factor militating against commercialization in the farming sector. Some may say that commercial farming neutralizes land fragmentization but taking a critical look at the subject matter, they are both linked up one way or the other. Taking for an instance a commercial farmer pledging for a land from a community man having six kid and he is willing to loan the land to the farmer for a period of time but with the permission of his children. If three of the children refuse to loan their portion of the land for some individual reasons, then land fragmentization has directly or indirectly affected agriculture commercialization. Also, land ownership by communities which can only be use by community members as created a restriction for aspiring alien precision farmers their by militating against precision agriculture in such areas of promising yield. 2.3 Technological awareness: Nigeria technology growth is on a creeping motion yet it is regarded as one of the fastest growing technological economy in Africa. Since the official lunching of the GSM device on the 6th of October 2001, there have been series of improvement in the technological sector but Nigerians believe that the best is yet to come. 2.4Infrastructural facilities and basic amenities: when talking about infrastructural facilities and basic amenities as they affect precision farming, it covers the application of precision farming technologies and their variations in time. The first step to be put into consideration to getting started with a full-time precision agriculture after the acquisition of land is the construction of a base centre for data collection, storage, and information command dissemination. This brings us to the challenges militating against the introduction of precision farming in Nigeria. The cost of building a standard base centre in Nigeria is very expensive as it involves the use of un-common and expensive technologies. The various precision technologies are been discussed in detail by Okwudiuche F.O. (2010). Also, the basic amenities required for the proper functioning of precision farming are practically not available in the country. This is a basic set back in the introduction of precision fa rming in the country. These basic amenities include electricity, road, water, and precision facilities which are the function of the government to provide the country with. Not to talk about the issue of electricity which has become outrageous. The Nigeria road is nothing to write home about and that of the scarcity of a natural resource as free as water is the most disgraceful of it all. Here, it is evident that the introduction of precision farming in Nigeria means rebranding Nigeria for the better, as it affects basically all aspects of living of the people. Also, precision machines are very expensive to come by especially when they are emerging technologies. There are also some factors to be considered when choosing a precision machine which include the workability of the machine involving weather as a factor in the machine production. Some machines are design to suite into the weather conditions which can be another factor in the design mechanism of a precision machine in other for it to be durable and work precisely. For instance, in the design of a sensors and telemetry for the collection and transmission of data from to the base centre, the weather condition of the region must be put into consideration because the use of sensors and t

Thursday, November 21, 2019

Consolidation in the Tour Operator Industry Case Study

Consolidation in the Tour Operator Industry - Case Study Example Visit Britain expects tourism to grow into a ?113bn industry if managed properly. However, despite tourism funding by the government being doubled since 1997, there is a threat that the UK tourism sector could slip behind international competitors. Economic Environment The tour operators’ industry has faced both economic and structural challenges over the past five years and through 2013-14 (Ithe BIS World, October 2013). Industry revenues have been as a result of economic downturn, lower disposable incomes, and reduced consumer confidence, due to which domestic tourists seek cheaper destinations. Tour operators’ revenues in 2008 show an increase over 2005 – from â‚ ¬60bn to â‚ ¬84bn (Appendix B) but this could also be, due to rise in tour prices, a rise in airfares and hotel charges. Therefore, loss of consumer confidence and declining incomes is a threat to the sector. ... Consumers demand value for money and consumers seeking mind prefer package aged holidays (Euromonitor International, 2013). Tour operators now offer flexible, dynamic packages but credit crunch impacts tourism as well. Consumers have responded to the credit the unch by choosing to holiday within the UK which has led to the trend of ‘staycation’ (Williams, 2008). Staycation holidays have increased by 13% and outbound travel decreased by 18% (Stamford, 2009a) which suggests that staycation and packaged holidays provide an opportunity to tour operators to redesign their product offerings. Technological Environment Technology has empowered the consumer in many ways. Low-cost airlines have made holidays more affordable; in addition, are the high-speed train networks. Internet penetration provides an additional distribution channel. Technology enables access to consumer data which facilitates tailoring their offerings to consumers. Mobile, technology and social networking have further empowered the consumer in seeking information, comparing and reading reviews about service providers before booking their holiday. This has helped major tour operators such as TUI to target specific segments through the strategy of differentiation. Technology thus is an opportunity to exploit the sector. Environment Tourism is generally associated with environmental degradation and ecological imbalance. The region is negatively impacted when the level of tourists exceeds the environment’s ability to cope with the use (UNEP, n.d.). In addition, natural resources are depleted; land area is reduced as infrastructure development takes place. Local resources are also used up by tourists thereby impacting the lives of the local people.

Wednesday, November 20, 2019

Behaviorism vs. Cognitivism Essay Example | Topics and Well Written Essays - 1000 words

Behaviorism vs. Cognitivism - Essay Example The primary aim of this paper is to outline the differences between two schools of academic psychology--behaviorism and cognitivism. I will first outline and explain two experiments purporting to explain human cognition by Jean Piaget. I will then explain how behaviorist B.F. Skinner might object to this methodology. Finally, I will address some possible responses to Skinner that Piaget could use to defend the scientific integrity of his experiments. Jean Piaget is often referred to in academic psychology as a â€Å"developmental cognitivist†. A developmental psychologist is one who scientifically studies changes in human personality, thinking and perceptions over the cross of a lifetime. Piaget’s research tends to focus on the development of human children--specifically the intelligence and cognitive capacities of children. Thus he can be said to be a cognitivist, in that he seeks to discover underlying thought processes by observing behavior. In two of his main works, The Construction of Reality in the Child, and The Child’s Conception of Number, Jean Piaget sets up a series of experiments, which purport to demonstrate the differences in cognitive and intellectual processes between adults and children. In the first experiment I am going to examine, Piaget attempts to explain the ability of children to discriminate between quantities of objects. He does this by placing two lines of candy next to each other--one with the candy arranged in a line spread further apart, and one with the same amount of candy in a line placed more closely together. The children are asked to determine which line contains a greater amount of candy. The results were that â€Å"Children between 2 years, 6 months old and 3 years, 2 months old correctly discriminate the relative number of objects in two rows; between 3 years, 2 months and 4 years, 6 months they indicate a longer row with fewer objects to have "more"; after 4 years, 6 months they again discriminate co rrectly† (Piaget). Piaget concluded that children gain the capacity to discriminate between quantities of objects at 2 years, 6 months, but for whatever reason, are unable to use this ability effectively for this task between ages 3 and 4. The second example of an experiment by Piaget I would like to discuss, seeks to demonstrate how children view the relationship between space and object: The child is presented with a model, about one square meter in size, representing three mountains in relief; he is to reconstruct the different perspectives in which a little doll views them in varying positions that follow a given order...when he is asked what the doll sees from a particular position the child describes what he himself sees from his own position without taking into account the obstacles which prevent the doll from seeing the same view. When he is shown several pictures from among which he is to choose the one which corresponds to the doll’s perspective, he chooses th e one which represents his own (Piaget). This experiment shows that young children lack the capacity to understand spatial relationships, relative to an observer other than their own. The child does not attempt to envisage how a particular object might look from the perspective of the doll, but defaults back to a description from their first-person point of view. Piaget concludes that the behavior observed here could best be explained by the developmental stage the child has reached. He points out that â€Å"the egocentrism and objective relativity in question here concern only the relationships between the child and things, and nothing in sensorimotor action forces him to leave this narrow realm† (Piaget). In other words since the child has only reached the point in life where she always encounters objects in relation to herself, even if you ask questions about the relation between an object and another observer, the child will not understand. Behaviorism is a school of thou ght in psychology that can be thought of in contrast to cognitivism. Rather than observing behavior

Monday, November 18, 2019

Interview Paper Essay Example | Topics and Well Written Essays - 500 words - 3

Interview Paper - Essay Example It is indispensable that the interview would assist in understanding criminal justice systems and its discretion. I interviewed Joseph S. Campbell, assistant director of criminal investigations division at FBI head offices in Washington, DC. James Comey, the director of FBI, appointed Campbell to act as assistant director of criminal investigation division on May 15, 2014. Mr. Campbell currently works at the department and ensures all criminal investigations cases remains duly addressed within the unit. Joseph S. Campbell have worked within criminal justice system since august 1990. Campbell started his career at the FBI as a special field agent. As an FBI’s special agent, Campbell reported to Chicago field office and conducted investigations relating to public corruption, organized crime, white-collar crime, and drug issues. Campbell has worked within the criminal justice system as an FBI staff for approximately 24 years (FBI, 2014). Mr. Campbell has various responsibility as assistant director of FBI’s CID, a division with approximately 4,800 special field agents, 520 headquarter employees, and 300 intelligence analysts. Campbell oversees most of the divisions activities including conducting training programs for CID agents and managing various pertinent crises within the system. He ensures that the division remains relevant to mitigation of national security threats before they occur. In addition, to coordinating CID’s objectives and employee compliance, Campbell ensures elaborate and efficient management of investigative programs including public corruption, drug-related crime, and financial crime. He ensures that the entire CID system remains efficiently coordinated in conducting comprehensive investigation cases relating to violent crime or organized crime. In addition, Campbell provides directives for the aforementioned investigative programs and other

Saturday, November 16, 2019

Hospital Web Application Design for Elderly Patients

Hospital Web Application Design for Elderly Patients The aim of this project is to develop an elderly friendly web application which can be used to book hospital appointments online and also interact with Doctors via skype. It also can be used by doctors to maintain patient records which can be given read access to patients to their records. This aim also needs us to answer few things and the first one would be to address the needs of ageing population in learning how to use a computer if they dont know already and also using a web application which would cater their needs and make their lives easy. We will also discuss the specific difficulties faced by the ageing population in learning computer skills which will in turn help them using a web application easily. Older adults and technology Health takes a down turn when a person gets old and in the future years the number of older adults are going to increase according to many statistics. This could lead to being hospitals and clinics overfilled and become more in demand. Due to several factors, older adults will need supervision in their health from proper health care practitioners (Codreanu Florea, 2016). Perception of control is one of the most important factors in determining ones place on a social environment. To keep up with the new technologies younger generation use older generation are learning new computer technology faster than the younger generation (Morrell, 2002). To avoid themselves from socially isolating in this day and age older adults learn computer skills and also learn how to use internet. And some even contradict Morrell saying that older adults learn computer skills slower due to physiological changes which makes their learning process slow. Older adults can integrate with the modern society by learning how to use new technology and also know how to learn new stuff from internet on their own. There are many E-learning programs which can be used by the ageing population to learn anything. Most of the times older adults make the government of a country to to question its own policy towards people working after they retire. In the same way, they should also be able to integrate with the rest of the society to use latest web applications which are in the market and adapt to them and for them to adapt to it, the application creators should focus that there are plenty of older adults as well who might use their application in a day to day basis. To dive deep into the discussion of why web applications should be older adult friendly we will discuss the myths around older adults using web applications, how older adults are engaging themselves in learning latest technology and also the obstacles they face in using a web application (Githens, 2007). The goal of this project is to focus on the guidelines to be followed which can make the older adults involve in using web applications and also focus on other opportunities related to it in the favor of older adults and companies which develop web applications. How retirement is changing? Life expectancies have been increasing which has also increased the retirement years proportionally. Due to this the older adults value, all the benefits they get from employment after retirements such as financial, social, physiological and many more. Those employments may be full-time, part-time, paid, unpaid or even a temporary employment (Hale, 1990). With this and also seeing organizations dealing with new talents due to reduction of experienced workers due to retirement we could say that retirement is an outdated concept (Stein and Rocco, 2001). With the research done in the past decade it is seen that the new talents also want to be working after they retire, which is about 80% in 2005 (Dychtwald, 2017). With this spirit the notion of retirement will be transformed in the future as these new talents are the ones which bring big changes in the current world. The world-wide web or as we call the internet is not just for the younger generation. With many new applications like Quora, Facebook and many more we have seen that the internet is accepting individuals all around the world irrespective of the age and it is also seen that there has been an increasing number in the people of older age group. To determine the exact number would be difficult as any precise number which comes up will be obsolete after it gets recorded.

Wednesday, November 13, 2019

Comparing Hercules by Walt Disney and Creating the Myth by Linda Seger

One of the greatest Greek mythological stories portrayed in a movie would be Hercules. Hercules is a well-known hero; he displays a supernatural individual who has to overcome the villain and his bad monsters. In â€Å"Creating the Myth† by Linda Seger, she argues that the hero myth as many obstacles (the death experience, the road back, the reborn) that he or she need to overcome to be transformed into a hero. However, these obstacles play a very important role in the hero’s stage of initiation. The movie â€Å"Hercules† by Walt Disney and the creator Alan Menken, we encounter the characters of the movie which are Hercules of course, Philoctetes the trainer, Pegasus the horse, loyal companion, Megera the love of Hercules and Hades the villain. All these characters connect strongly with Hercules because they guide him to become a hero. I argue that the movie â€Å"Hercules† follows the theory â€Å"the Hero Myth â€Å"by Seger, because he was a caring person who loved to help others; he evolved to be a strong person because he listened to his mentors that helped him gained strength, and was courageous individual because of all the obstacles he had to overcome. First of all, the character Hercules was a non-hero who later received the power of strength. As a young boy Hercules wished to overcome any problem and always had in mind to be a strong man and to do the impossible. For example, in the movie , Hercules is a hard working kid who later by his parents gained a valuable power of strength being â€Å"introduced in ordinary surrounding in a mundane world, doing mundane things â€Å" (Linda Seger 2) Hercules could not believe where all his strength was coming from because he had become too powerful to believe. Seger also explained that â€Å"this is how... ...ero and is well-known because he overcome all challenges and accomplished the mission to become a great hero because he is caring, strong and a courageous individual. Without these three powerful gifts Hercules would have not proven himself a true hero. Although, Hercules was not instantly known as a hero, he had to prove his will of becoming one and he sure did. From my point of view, I liked better the Disney version of Hercules than the real myth of Hercules because the movie includes comedy and is appealing to family and children. Seger explains, that â€Å"A myth is more than true because it is lived by all of us, at some level. It’s a story that connects and speaks to us all† (1) and I agree with her because every myth has logic and that logic will last forever. Works Cited â€Å"Creating the Myth† by Linda Seger â€Å"Hercules† Walt Disney. Creted by Alan Menken

Monday, November 11, 2019

Professional Athletes’ Salaries

In today's society, the American people can't get enough of their favorite teams and athletes. Entire cities are infatuated with these teams and as a result, people spend much of their time and money watching and rooting, hoping for a victory. There is nothing wrong with enjoying and marveling at the talent of these professional athletes, but what happens with all these resources that go into the sports? They go straight to the players. Although our society idolizes and cheers on our favorite athletes, they are significantly overpaid. The amount of money some of the best athletes make in a year is astonishing.Professional baseball player, Alex Rodriguez, will have made 33 million dollars this year, just based on his salary, not including endorsements (Freedman). Tiger Woods made almost 23 million dollars in his winnings from various golf tournaments in 2009, and add on another 105 million from his endorsements and you get the highest paid athlete in the world (Freeman). Endorsements are another subject entirely, but it makes you understand how important it is for companies to have their logo on someone's hat, or have a big star in their commercial.Keep in mind not all athletes are paid in millions, we are talking about some of the best in the most popular sports. That being said, the average MLB player's contract will be around three million dollars, and the minimum being 400 thousand dollars (MLBPA). This means a player sitting on the bench the entire season will make nearly ten times what the average teacher will make. The reason all of these players get paid so much is because all professional sports leagues are essentially a business. And with all these countless numbers of sport fans (myself included), business is booming.It is important to understand how the business works when you need to fix a problem. The Managers and Owners want their team to do well to bring in the fans, which in turn brings in the money. If a team is doing well they will make expone ntially more money because of the sellout crowds and the jersey's flying off the shelves. The best way to improve your team is to get the best players, and that is done by paying for them. When a player is a free agent (does not have a contract to a specific team), teams will essentially bid and negotiate, and in most cases the highest paying team will get that player.This is why teams like the Yankees have so many of the best players, because of their humungous fan base, they have a seemingly unlimited amount of cash to bring in the best players. So all this money is coming in from tickets and clothing and other sources of income and it has to go somewhere, right? Many people think athletes are rightfully paid all the money they have earned. Some argue that football players have short careers and many health problems after they are retired, so they will then need money for their injuries.With the average NFL player making 310 Thousand dollars in a year (NFL Player†¦ ), and the y play 10 years for example, they should be okay financially. Some young athletes will receive their first big check and go blow it all immediately. This is why some players are broke years after their career, and try to use it to justify their pay check, and make it seem as if they aren't paid that much at all. In reality it is their poor money managing skills; they still make a ridiculously larger amount of money in their career than any normal person will make in their lifetime.Another argument is that not all athletes are paid so highly. This is true, a professional volleyball player, or even a minor league baseball player, will probably not make as much as a A-Rod or Tiger, but they are making a living by having fun playing a sport. What more could you ask for? When you take a look at an athlete's salary and compare it to a teacher, fireman, or even a doctor, it doesn't even come close. There are so many other occupations that are paid much less than a pro athlete, but contribu te much more to our community.Teachers are having to have more and more students in their classes and many of them are having to find a new career because of the pay. A good teacher can change the lives of some students and provide so much knowledge, but it is hard to aspire to be a teacher rather than an athlete when you compare the two's salary. Think of all the money we could put into education, health, the environment, just to name a few. Just being able to live by playing a sport is something players shouldn't take for granted.It is the very fans of the sports who are responsible for such high salaries (Callahan). The main way to lower professional athletes' salaries would be for people to stop paying so much for tickets, jerseys, and sports packages on television. Frankly, that will not be happening anytime soon with the current way we worship these people. What needs to happen is the big professional sports leagues (NBA, MLB, NFL, NHL), need to recognize what is going on. The y need to see how our economy is hurt and how our society needs the financial support.Ticket prices need to be slashed. Jersey prices need to be slashed. The best athletes can still be rewarded and paid a few hundred thousand, not millions and millions. They can still make great money from endorsements. And those extra funds need to be given back to the cities that have given so much to the sports franchises. The people need them to rebuild our educational and health systems, and our overall economy. Players can still have a great standard of living, but it is just wasted money if they are sitting among America's richest.Many of these arguments can also be said for corporate CEO's and that needs to change. These people are at the top of the food chain while everyone below them is hurting. The sports leagues are blinded by greed and stardom; not only is it the athletes being paid so much, but the team owners as well. It is okay to look at these pro's as a personal hero, but we need t o step back and cut down on how much we idolize them if we want to see improvement. In the end, it is all a business and it is their job to step up and make a change to better our society.

Friday, November 8, 2019

Green Sea Turtle

Green Sea Turtle The green sea turtle is a magnificent creature. The green sea turtle swims through the ocean and primarily lives in the ocean. The Green sea turtle is a green large sea turtle.The green sea turtle can live from anywhere from 50 to 80 years. The green sea turtle has many predators. Some of these predators include seagull's hawks and fish in the ocean. The sea turtles can also die when they hatch from their eggs.The Green Sea Turtle has around 45-70 eggs every time they lay eggs. (National geographic turtle eggs Roger Wood) When the turtle lays eggs depends on the animal itself and the conditions it lives in. The sea turtle buries their eggs in the sand on the beach (xmission.com/gastown/herpmed/lights.htm). Although 90 percent of the hatchlings don't make it in the world. The hatchlings either doesn't make it because of weather or because of the predators get them right when they reach water or before they reach water.English: Green Sea Turtles, Chelonia mydas breaks ...The Green Sea Turtle eats only plants just like its family member the black Sea Turtle. The Green Sea Turtle is an Herbivore. Unlike other Sea Turtles who are either Carnivore or Omnivore. The Green Sea Turtle eats seaweed unlike other Sea Turtles who eat crab and other small fish that are in the ocean. (National geographic turtle eggs Roger Wood) The Green Sea Turtle is a Reptilian. They are in the class with snakes and geckos and other lizards of that sort. The Latin name for this animal is Chelonia. The animal is found always in the pacific ocean.The animal has rare interactions with humans. The Green Sea Turtle has bad interactions with humans. When the turtle does have an interaction with humans it tends to bit the body of the human in self-defense. Although...

Wednesday, November 6, 2019

Free Essays on The Assassination Of John F. Kennedy

The Assassination of John F. Kennedy Our nation has had many memorable, yet unforgettable, moments in its long, enduring history. The assassination of John F. Kennedy, our thirty-fifth president, in the fall of 1963, is not only one of the most memorable, it is also one of the most bizarre cases in our nation’s history. John Fitzgerald Kennedy became our nation’s thirty-fifth president on January 20, 1961 (Rivera 12). Kennedy was a good-looking man. Rich, honest, attractive, everything a forty-three year-old Democrat would need to become one of America’s best-known presidents. Many historians believe Kennedy the greatest president in U.S. history. Kennedy’s promise of new health, housing, and civil rights programs only helped his popularity as he defeated Richard Nixon in the election of 1960 (Rivera 12, 13). Kennedy’s presidential job faced many problems as soon as the young president took the oath of office. Hundreds upon thousands of Cubans were flocking to the United States because of Communist Leader, Fidel Castro (River 13). Kennedy’s growing problems led to the invasion of Cuba, a place known as the Bay of Pigs, on April 17, 1961. The invasion was a complete failure and the US was unable to overthrow Castro in the Communist regime. Many Cubans, as well as Americans, felt Kennedy made a bad decision and distrusted the government because of the Bay of Pigs. In the same year, the US Government sent spy airplanes over Cuba. Photos clearly showed weapons, mainly missiles and anti-aircraft weaponry. This was the beginning of what became known as the Cuban Missile Crisis (Rivera 9). Kennedy wanted the missiles gone. Advisors wanted to drop bombs, but Kennedy wouldn’t allow it. He thought Russia could possibly interfere and another world war would be in sight . Another growing problem with the Kennedy campaign was the fight for civil rights. Kennedy created the Committee on Equal Employment Oppo... Free Essays on The Assassination Of John F. Kennedy Free Essays on The Assassination Of John F. Kennedy The Assassination of John F. Kennedy Our nation has had many memorable, yet unforgettable, moments in its long, enduring history. The assassination of John F. Kennedy, our thirty-fifth president, in the fall of 1963, is not only one of the most memorable, it is also one of the most bizarre cases in our nation’s history. John Fitzgerald Kennedy became our nation’s thirty-fifth president on January 20, 1961 (Rivera 12). Kennedy was a good-looking man. Rich, honest, attractive, everything a forty-three year-old Democrat would need to become one of America’s best-known presidents. Many historians believe Kennedy the greatest president in U.S. history. Kennedy’s promise of new health, housing, and civil rights programs only helped his popularity as he defeated Richard Nixon in the election of 1960 (Rivera 12, 13). Kennedy’s presidential job faced many problems as soon as the young president took the oath of office. Hundreds upon thousands of Cubans were flocking to the United States because of Communist Leader, Fidel Castro (River 13). Kennedy’s growing problems led to the invasion of Cuba, a place known as the Bay of Pigs, on April 17, 1961. The invasion was a complete failure and the US was unable to overthrow Castro in the Communist regime. Many Cubans, as well as Americans, felt Kennedy made a bad decision and distrusted the government because of the Bay of Pigs. In the same year, the US Government sent spy airplanes over Cuba. Photos clearly showed weapons, mainly missiles and anti-aircraft weaponry. This was the beginning of what became known as the Cuban Missile Crisis (Rivera 9). Kennedy wanted the missiles gone. Advisors wanted to drop bombs, but Kennedy wouldn’t allow it. He thought Russia could possibly interfere and another world war would be in sight . Another growing problem with the Kennedy campaign was the fight for civil rights. Kennedy created the Committee on Equal Employment Oppo...

Monday, November 4, 2019

Sales Coursework Example | Topics and Well Written Essays - 250 words

Sales - Coursework Example Q1. Lynn should center her presentation on the reputation of McBath and the company’s new display system. Some of the key selling points that she should discuss include the fact that the display system will not require too much space. She should also include the fact that shoppers already love McBath’s products since the company is different. Another key point that Lynn should use in her presentation is the fact that the display system has actually worked in other new stores and an advertising campaign for the new display system is in the offing. Q2. Stores can be offered quantity discounts when they purchase McBath’s products in bulk. This will encourage stores to buy McBath’s products in large quantities (Munson 209). Stores may also be offered cash discounts when they pay in cash. This will create a healthy working relationship between McBath’s and it’s clients (Rackham 165). Consumer discounts: shoppers may be offered an extra package when they buy three. This will enhance customer loyalty and will encourage new customers to purchase McBath’s products (Schultz, Petrison and Robinson, 116). Resellers may also be offered trade discounts on the products they buy so as to encourage them to keep buying McBath’s products (Rackham 165). Q3: Lynn can use the each of the four discounts to get new accounts. People are normally drawn to products that offer discounts. She can use quantity discounts to encourage Federal and other stores to keep purchasing McBath’s products. She can also use consumer discounts to enhance the sales of McBath’s products in different stores. She can make use of the cash discount offers to encourage the new stores to keep buying the company’s

Saturday, November 2, 2019

Critical analysis Twelfth Night Essay Example | Topics and Well Written Essays - 750 words

Critical analysis Twelfth Night - Essay Example Although categorized as a romantic comedy, relating the story of a pair of twins washed up separately upon the same shore, each thinking the other is dead, Shakespeare’s Twelfth Night provides a great deal of this kind of social commentary as the two youths become involved with nobles they meet in their journey back together. By analyzing a single scene of this play, one can begin to understand how Shakespeare managed to convey social position and degree of intelligence in such a way that calls into question the prevailing social assumptions of his time. The scene is divided by the arrivals of two of the characters to Olivia’s house that quickly demonstrate the difference of social classes existent in England at the time. At the opening of the scene, Feste, the house jester, returns after an unexplained absence and finds it necessary to charm his way back into his mistress’ good graces. According to Richard Holinshed, â€Å"These men are profitable to none; for, if their condition be well perused, they are enemies to their masters, to their friends, and to themselves† (1580). Thus, his behavior seems to suit his station as in attempting to ease his way back into the household, he distracts the other characters from pursuing his personal activities by making jokes until the scene is interrupted by the arrival of Viola, disguised as the servant Cesario, delivering a message of love from Duke Orsino for the noblewoman Olivia. The conversation between Olivia and Cesario sparks an immediate and intense interest from Olivia, who recognizes Viola belongs to her own upper class. In both halves of this scene, language variety reveals social class as well as sincerity of intention within the characters portrayed. Feste changes his language style depending upon whom he is speaking with, making it possible for him to switch from one class to another simply by changing his means of communicating. As he speaks