Ecology Exam 1 Essay Example

Ecology Exam 1

Composite Numbers What Are They How Can You Spot Them

Composite Numbers What Are They How Can You Spot Them SAT / ACT Prep Online Guides and Tips Do you know the difference between prime and composite numbers? If not, don’t worry! You’ve come to the right place. In this post, we’ll talk about what prime and composite numbers are and give you a handy chart you can use to quickly see if something is a composite number. What Is a Composite Number? Composite numbers are whole numbers that are greater than 1 and divisible by other whole numbers. Here are the questions to ask yourself to decide if a number is composite: Is the number a whole number? Is the number greater than 1? Is the number divisible by whole numbers other than itself? Let’s apply those questions to two different numbers to see if they are composite or not. Take the number â€Å"4†. 4 is a whole number. It is greater than 1. You can divide 4 by 4. You can also divide 4 by 2, so it’s divisible by other whole numbers. That means 4 is a composite number. Let’s look at the number â€Å"3†. 3 is a whole number. It’s greater than 1. You can divide 3 by 3. But, you can’t divide 3 by any other whole numbers. That means 3 isn’t a composite number. How to Tell the Difference Between Prime and Composite Numbers If a number isn’t composite, then it’s prime. Prime numbers are numbers that are greater than 1 that are only divisible by themselves and the number 1. The best way to tell if a number is prime or composite is to perform the divisibility test. When you use the divisibility test, you check to see if a number is divisible by common prime factors, like 2, 3, 5, 7, ,and 13. If you’re testing an even number, start by trying to divide it by 2 to see if it’s composite. If you’re testing a number that ends with 0 or 5, try to divide it by 5. If you get a whole number when dividing by any of these common factors, then your number is composite. If you get a fraction or decimal when dividing by these common factors, then your number is likely prime. Composite Number Chart (1-100) Here is a handy composite number list to reference. All of the numbers in blue are composite numbers. Prime Number Chart (1-100) Here’s an easy-to-reference prime number list. All of the numbers in red are prime numbers. Final Thoughts It’s important to know whether a number is prime or composite so you can understand whether or not the number is divisible. Remember, ask yourself these questions to tell if a number is a composite number or not: Is the number a whole number? Is the number greater than 1? Is the number divisible by whole numbers other than itself? What’s Next? Writing a research paper for school but not sure what to write about?Our guide to research paper topicshas over 100 topics in ten categories so you can be sure to find the perfect topic for you. Learning about natural logs?Check out our guide on the natural log rules you must knowto ace this subject. What is dynamic equilibrium and what does it have to do with rusty cars?Find out by reading ourcomplete guide to dynamic equilibrium.

UNIT 5 Essay Example | Topics and Well Written Essays - 500 words - 1

UNIT 5 - Essay Example When management carries out its duties effectively by attaining desired results, then that defines doing things the right way. On the other hand, when management does things efficiently, that is accomplishing set goals in the required way, then that is doing the right thing. Setting measurable goals such as budgets and production levels gives the manager a chance to analyze reasons for missing certain goals. Reasonable and measurable goals help managers to expose reasons that results into struggles of working staff. In addition, measurable goals help in preventing miscommunication among members of the organization. Without measurable goals, employees morale decreases because staff members feel that they work without direction. It, therefore, is through setting up of measurable goals that employees prove to their managers their worth and goals. Every project goal has its critical dimensions. Three of these critical dimensions include cost, scope and schedule of the project in question. For any project, the manager must put into consideration cost of materials that the entire project may require. Secondly, the required release date of the project makes it necessary for a manager to treat schedule with significance (Sanzo et al.,  2012). Finally, project managers also need to take care of the project scope. Project scope involves performance requirements and any other set features in the project goal. The most common types of project manager’s charts are the PERT Chart and Gantt chart. Both PERT and Gantt charts help managers to plan their projects in a manner that enables the project team to visualize the project as a whole or in part (Bowen, 2014). However, PERT and Gantt display varied contrasts. Gantt charts describe tasks dependencies, onset and ending times for project tasks while PERT charts describe parallel activities and that are sequential. Gantt charts mainly depict simple related tasks whereas PERT charts focus on

COSTS OF PRODUCTION Essay Example | Topics and Well Written Essays - 750 words

COSTS OF PRODUCTION - Essay Example To understand the concept indivisibility of some factor inputs, we can look at some examples from the Tropical Smoothie cafà ©. Some of the indivisible inputs include the business idea, entrepreneurial skills, and the skills of individual workers among others. In this  case, it is  clear that not all inputs all divisible. Therefore, the indivisible inputs should be utilized efficiently to avoid wastage. There exist several characteristics or features of a competitive market structure. For instance, there are no barriers to entry in the market. In this regard, firms are free to penetrate or exit the market on their own pleasure. As a result, there are many small firms that serve the entire market such that no firm has sufficient power to control the market (Dwivedi, 2006). Therefore, the price of commodities in such a market are determined by the forces of demand and supply. In essence, the firms have to set prices that are in line with the existing market price. Generally, it can be argued  that the firms in such a market are price takers. Van & Camesasca (2001) state that a perfectively competitive firm offers identical products to that of competitors. In this regard, the consumers can switch from one firm to the other since all products are close substitutes. Actually, the products serve the same customers’ needs and wants and, therefore, firms are forced to devise unique means of surviving the competition. In essence, the homogeneity of products in perfectively competitive markets creates a cut-throat contest among the firms in the competition. Perfectly competitive firms operate with resources that are easily transferable from one industry to another. In essence, the firms are flexible to changes and, therefore, can fit in more than one industry. Studies have shown that most perfectly competitive firms do not operate in one industry for their entire life of

Urban air pollution and the automobile Research Paper

Urban air pollution and the automobile - Research Paper Example The atmosphere of the earth is a thin cover composed of different gases and water vapors and is a great blessing for mankind as it surrounds the whole earth and sustains the human life on this planet. The vertical thickness and density of the atmosphere depends upon different ecosystems. The atmosphere along with its different ecosystems plays a significant role to maintain the overall planet’s temperature and in provision of coal, oil, food crops, and drinking water to human society. Man has exploited endlessly the available resources and has always assumed that they are inexhaustible. Today human has realized that he has been constantly disturbing the ecological balance and fast finishing the life-supporting systems on the earth. Urban pollution is caused by many factors like industrial and thermal power plants, but more importantly by vehicular emissions. As a result, the outdoor air quality in urban areas has deteriorated significantly. Statistics reveals that in last 30 t o 40 years, the concentrations of suspended particulate matter in huge cities like Mexico, New York, Tokyo, Mumbai, Karachi, Seoul, Beijing, Bangkok, and New Delhi etc were four to five times higher than levels recommended by world health organization (Brown, 1999). A substantial increase in the number of vehicles on urban roads continues to drive up levels of urban air pollution. Common gases emitted by vehicles include carbon monoxide, nitrous oxides, and ozone. These all gases are dangerous to human health beyond certain levels of concentration. Poly-aromatic hydrocarbons released by diesel-powered vehicles are known carcinogens, while smoke from diesel engines has aggravated already elevated levels of airborne soot. Nitrous oxides are emerging air pollutants with the highest concentrations recorded in metropolitans. Thesis Statement. People have right to use car, but there are many solution to save our environment; such as, public transportation and government should make rules to use car. The following paragraphs will deal this statement by describing the beneficiary management and role of public transportation, fuel used by different types of cars, and the corrective preventive measures to control the urban pollution produced by automobiles. II. Public Transportation As compared to 100 years ago, no doubt today human being is enjoying much better mode of travelling throughout the world like presently cars, buses, trams, trains, and subways are facilitating millions of human being daily. According to World Resource Institute (2008), all these transportations contribute to almost 25% of the overall global energy consumption while cars are responsible for about 80%. Since automobiles are major cause of emission of greenhouse gases in atmosphere (Fenger et al, 1999), therefore in respect of urban pollution, the use of public transport is very beneficial because per head it produces less greenhouse gas emissions into the atmosphere than cars. Secondly, the us e of public transportation is cost effective both at individual and national level. Although the use of public transportation is less glamorous, however, it keeps the individual free of searching the parking, fuel, and maintenance of personal vehicle. An integrated and well-planned network of public transportation have shown much better results in reduction of greenhouses gases and other pollutant material into air. For example in United States, there were almost 1.6 cars for every two Americans in 2005 while at the same time 160 Americans were entertained by a single trolleybus. By the advent of trams in Europe, great results have been observed. Trams and trains carry millions of people inside the city on regular basis and thus prevent the society from further automobile pollution which could have been occurred by the use of their passengers. III. Fuel of Vehicles Numbers of fuel options are available now days for the owners to use in their vehicles. However,

Energy Policy For Libya Environmental Sciences Essay

Energy Policy For Libya Environmental Sciences Essay Libya is Africas largest oil producing and exporting country, located in the heart of North Africa, the country is home to 6 million inhabitants distributed over an area covering 1,750,000 Km2. Crude oil is an integral part of the Libyan economy and forms the basis on which the Libyan energy policy is formed, however, with increasing global drive towards more sustainable and renewable energy sources, admits issues of climate change, and global warming, there has been renewed and concerted efforts shown by nations around the world to adopt more sustainable energy sources, this has been highlighted in varied global convections and treaties amongst which are, the 1997 Kyoto Protocol, the 2009 Copenhagen summit to mention but a few. This paper attempts to highlight the place of a developing nation and major oil producer and exporter like Libya in renewed efforts to ensure lower dependence on fossil fuel sources, the countrys current energy policies and the state or extent of renewable en ergy resource in the country admits global CO2 reduction targets of 80% by 2050 to stem human contributions to climate change and global warming from fossil fuels. LIBYAN ENERGY BACKGROUND In Libya, the daily average of solar radiation on a horizontal plane is 7.1 kWh/m2/day within coastal regions, and 8.1 kWh/m2/day in the southern region, with average sun duration of more than 3500 hours per year (Saleh Ibrahim, 1993). The national electric grid consists of high, medium and low voltage networks of about 12,000 km, 12,500 km and 7,000 km power lines respectively with an installed capacity is 5600 MW and a peak Load of 3650 MW (Saleh Ibrahim et al., 1998). However, despite the remarkable energy network for a population of 6 million, energy is mainly concentrated in the major cities as many villages and remote areas are located far away from these networks. The small population and small consumption needs of these areas make their connection to the grid less economically viable. This has led to the use of small diesel generators in these areas contributing albeit minimally to the CO2 emissions. Furthermore the total dependence on fossil fuel sources for the generation o f electricity for the national grid belies the tenets of conventions and treaties on climate change, global warming and sustainable energy development. This however calls for the proper assessment of current energy policies in Libya and the place of renewable energy. Libyan renewable energy resource has the potential to provide clean and reliable energy sources which can be used in many applications in remote areas (electricity, water pumping, etc.) and even contribute to the national grid. Albeit the use of renewable energies has been introduced in a wide range of applications due to its convenience and economic attractiveness, application on a much larger scale in Libya has been hampered by the relative abundance of cheaper crude oil sources. GREEN HOUSE GAS EMISSIONS AND CLIMATE CHANGE Carbon emission has witnessed a meteoric rise since the turn of the Industrial age, Industrial processes have churned up 37 percent of amount of carbon in the atmosphere to date (Boden et al, 2009), Since the advent of industrialization, massive use of fossil fuels for energy generation have been recorded, there has been increase in the amount of gaseous waste produced in homes, and from transportation. These Gases collectively result in forming a layer in the earths atmosphere shielding radiated sunlight from the earths surface, depleting earths ozone layer and causing general warming of the earth. The effect of these gases is known as the green house effect, the process of gradual warming of the earth is Global warming and the gases are referred to as green house gases. The gradual increase in the earths overall temperatures has a telling effect on activities and life contained in it. Scientist predict, that rising green house gas levels would result in greater earth warming and invariably melting of the ice caps, increase in ocean mean water levels (20mm by 2020), increased flooding of coastal lands enhanced drought in arid lands (IPCC, 2007) etc, and these are part of the deleterious effect of climate change, which has led to a global outcry for the reduction in the emission of gases that give rise to this effect and the setting of CO2 reduction target of 80% by the year 2050. The earth is said to have warmed up by 0.740C over the last hundred years and about 0.40C of this occurred in the last decade (DEFRA, 2006). Agreements, declarations and treaties have been made in summits top on the list of which is the Copenhagen Summit of 2009 borne to develop and exploit means for carbon capture and storage, The Rio declaration of 1992 was to outline support for protection of the environment from the deleterious activities of man, while the Kyoto protocol of 1997, outlined the six major green house gases and set targets for governments to cut down on the production of these gases as waste. Human Drivers Greenhouse gases are released into the atmosphere by various mechanisms, chief amongst them is the burning of fossil fuels like coal, oil, and gas. Over the past fifty years, growth of the world economy has been hinged on worldwide energy use this has resulted in increase in global concentrations of carbon dioxide and other greenhouse gases in the air. The Kyoto Protocol highlighted anthropogenic emissions as a major cause and as an addendum listed six greenhouse gases. The KYOTO Protocol In 1997, the United Nations having evaluated the potential threat of global warming and the attendant causes (anthropogenic emission of greenhouse gases) proceeded to outlined the six major greenhouse gases and set targets (of 80% reduction in CO2 emissions by 2050) for national governments to cut down on the generation of these gases as waste or emit them as pollutants. The summit held in Kyoto Japan, entered into force in 2005. The Protocol which shared the ultimate objective of the Convention in Kyoto, Japan was to ensure that nations take steps to stabilize atmospheric concentrations of greenhouse gases ensuring that they do not exceed levels that will enhance dangerous interference with the already delicate climate system. The convention also attempted to build upon with a view to enhancing many of the commitments that were already in place under the Convention (UNFCCC 2007). Albeit the Kyoto Protocol was influenced by political factors, its ratification by most countries may be justified in light of the peculiar features of the global warming debacle, the existence of uncertainties, non-linearities and irreversibilities, possible catastrophes with small probabilities, asymmetric distribution of impacts, and the very long planning horizon (IPCC, 1996). The scientific uncertainties enshrouding the climate change and global warming still remain a rallying point for critics. The Kyoto Protocol tackles emissions of six greenhouse gases: carbon dioxide (CO2); methane (CH4); nitrous oxide (N2O); hydrofluorocarbons (HFCs); perfluorocarbons (PFCs); Sulphur hexafluoride (SF6). CURRENT LIBYAN ENERGY CLIME The Libyan economy has been heavily dependent on the hydrocarbon industry since the discovery of crude oil. In 2008, the hydrocarbon industry in Libya accounted for over 95% of the countrys export earnings, 85-90% of fiscal revenues and over 70% of Libyas gross domestic product (GDP) (IMF 2009). Libya holds the largest crude oil deposit in Africa amounting close to 44 billion barrels of oil reserves (OGJ 2010). EIA 2008 data indicate that 2008 total oil production in Libya was approximately 1.88 million barrels per day (bbl/d). Energy is the backbone of the economy availability of cheap energy compared to other Mediterranean countries has helped to the expansion of all sectors, like industry, commerce, construction and services. However, as much gas is found in the crude (associated gas), Libya engages in gas flaring activities (to get rid of associated gas) thus ensuring a steady and direct injection of greenhouse gases to the atmosphere. LIBYAN CONVENTIONAL ENERGY RESOURCES Current energy supply in Libya cannot be considered as sustainable sources of energy, with increasing cost of energy from attendant increase in exploration and refining cost, there is also the case of fuel sources being limited and environmental problems. Fossil fuel is limited or finite and Libya relies on energy from two limited conventional sources. Oil: With total discovered resources estimated to 44 billion bbl. Natural Gas: With total discovered resources estimated to 1300 billion m3. It is estimated that Libyas oil resources will not last more than 50 years with current rate of exploration and production, albeit natural gas is expected to last a little longer (Saleh 2006) It is projected that by the year 2050, prices of crude oil barrel may reach more than $200 while Libya would require about 70 million barrels of oil per year for electricity production requirement costing about 14 billion dollars annually. This would ultimately result in pressure on crude oil sources, its availability and increase in cost of generating electricity therefore underpinning the need for more sustainable forms of energy. By contrast, the abundance of potential sustainable energy in Libya decries the dependence on fossil fuels for example; the solar radiation in Libya is equivalent to a layer of 25 cm of crude oil per year on the land surface. Energy and emissions figures in libya Jacqueline 2000 reports that the amount of greenhouse gases emitted determines the magnitude and rate of future climate change, the sensitivity of climate to these gases and the degree to which the effects are modified by aerosol emissions. Libya, with 2002 estimations, had a 69.2 % energy consumption from oil and 30.8 % from natural gas, the emissions of CO2 attributed mainly to oil (71.7 %) and (28.3 %) natural gas (EIA, 2005), this means invariably that the energy sector which is the main source of greenhouse emissions in Libya depends mainly on fossil fuels (oil and natural gas). CO2 emission in Libya is put at 55.5 million tonnes per annum in 2009 following United Nations reports relating to 9.19 tonnes per capita and 31.5 tonnes per kilometre square (World Bank 2010). Libyan Energy consumption by Sector Current Libyan Energy consumption shows a total dependence on energy from fossil fuel sources. With domestic consumption of 273,000 bbl/d in 2008, shared within the sectors as described below. Residential 34% Industry 27% Commercial 27% Transport 12% Source: Oil and Gas Directory 2010. Figure 1: Current energy consumption in Libya by sector Table 1: Energy Production in Libya Type Production Consumption Export Natural Gas 12 b m3/y 3 b m3/y 9 b m3/y Oil 0.6 b bbl/y 0.1 b bbl/y 0.5 b bbl/y Electicity 20 T Wh/y Source: Saleh 2006 Environmental Impact Carbon Implication/ Future projections Libyan power stations utilize only fuel from fossil sources to generate electricity, and with the high demand of energy, from all the sectors which is estimated to more than double by 2050, there is going to be substantial increase in CO2 emissions by 2050, thus raising atmospheric carbon levels and contributing ever so gravely to the already deteriorating state of the climate. With the varied effect of global warming already being felt steps need to be taken to limit further emissions and manage present situation. Anthropic emissions of CO2 amounted to 26 billion tonnes in 2004. In a reference scenario extrapolating current trends, CO2 emissions are set to double by 2050, to more than 50 billion tonnes of CO2 a year. Continuing this trend would lead to an atmospheric concentration of CO2 exceeding 1,000ppm (parts per million) at the end of the 21st century, a concentration that is totally unacceptable in terms of its climate impact and its socio-economic consequences (IFP 2007). Global Warming Trends/ Future Trends In a bid to predict future climate change conditions, Scientists develop mathematically-based climate models. Adopting different assumptions on how various factors play to predict how atmospheric CO2 levels and temperatures will change in future. The variables in each model include: Population growth rate Economic development Energy use Efficiency of energy use Mix of energy technologies The graph below shows the results from three climate models used by the IPCC, with predictions starting in 1990 and ending in the year 2100. In all three, the global population rate rises during the first half of the century, and then declines. The A1B model assumes rapid economic growth and increased equity-the reduction of regional differences in per-person income. New and more efficient technologies are introduced, without relying heavily on a single energy source. The A1F1 model is the same as A1B, but assumes the continued use of fossil fuel-intensive technologies. In the B1 model, the world moves rapidly from a producer-consumer economy toward a service and information economy. There is a reduction in the use of raw materials, and an emphasis on clean and efficient technologies and improved equity. Other models have been developed, each based upon a different set of assumptions. Figure 2: Adapted from IPCC, Third Assessment Report on Climate Change, 2001. Global temperature increases predicted by three different IPCC climate models. Although differing in degree, these three climate prediction models show similar trends: The projected rate of global warming in the future is much larger than the rate of global warming during the 20th century. Predicted rates of global warming are greater than any seen in the past 10,000 years. (Exploring earth 2009) From the chart above it is clear where we have to take a stand. With the above stated premise and the statistical review, it is imperative to develop a strategy that first curtails present carbon emissions and subsequently reduces the overall generation from various sources described above. MITIGATING CLIMATE CHANGE VIA LIBYAN ENERGY POLICY INCORPORATING RENEWABLE ENERGY Strategies for reducing CO2 emissions by 80% by 2050 and Implementation Techniques Taking into cognisance current emission trends and sectors fingered in CO2 emissions, cutting down of emission cannot be over emphasized. A proactive approach to detailing of strategic plans of action for implementation must take into account past emission log; fully understand the current situation and project reduction measures that proffer solutions through a cost effective and practicable approach. To achieve these, the need to fully understand the scope of the problems at hand is imperative. To this end, I propose a utilitarian based all inclusive approach to reducing 80% emission by 2050. My approach is based on the incorporation of renewable energy in the Libyan energy policy. Libyan Renewable Energy Potential Libyan geographical location positions 88% of its area in the Sahara desert region of Africa, where there is a high propensity of solar energy which can be used to generate electricity via solar energy conversions, of both photovoltaic panels, and or thermally. According to the trans Mediterranean interconnection for concentrating solar power (MED-CSP)highlights Libyas renewable energy potention as depicted in the table below. Table 2: Renewable energy sources for Libya Type Potentiality Solar electricity 140,000 TWh/y Wind electricity 15 TWh/y Biomass 2 TWh/y Total 157,000 TWh/y Source: Saleh 2006 .This shows enough renewable resource potential to meet 3 times electricity demand in Libya by the year 2050 Renewable energy hold advantages over conventional fossil fuel sources for the provision of energy in that they portend convenience and are economically effective and viable in many areas of applications. Libyan renewable energy resource consists of photovoltaic conversion of solar energy, solar thermal applications, wind energy, and Biomass Solar Energy conversion of solar energy in Libya for electricity generations could be in two forms, the utilization of photovoltaics or solar thermal application. Thermal Conversions Solar heaters were introduced in Libya in 1983 with a pilot project that included 10 systems. The effectiveness of these systems has led to installation of about 2000 additional solar heaters. Figures show that water heating consumes about 12% of energy from national electricity production however, fundamental issues limit wider application of thermal converters for water heating in Libya, these issues include; Absence of decentralised national or personal electricity generation industry. Lack of information for the people. Low electric energy tariff. Solar Photovoltaics Operating on the simple principle of direct conversion of solar power into electricity, achieved by the agitation of electrons in P-N junctions by photons which thus creates an electric current which is tapped of by conducting wires. PV resource potential within Libya is enormous; current small scale applications highlight the use of PV in the following areas; PV in Microwave Communication Networks Amongst the 500 repeater station in Libya, 9 have been run by photovoltaic systems up until the end of 1997 producing a total peak power of 10.5 KWp. Of these, four still run after 26 years of work, with minimal maintenance as the batteries which they use are open type batteries and were replaced three times with an average lifetime of eight years. With the technical and economical success of PV systems, all communication networks previously powered by diesel generators were converted to PV systems thus effectively bringing the total number of PV run station to about 80. The total installed photovoltaic peak power by 2005 was around 420 KWp. (Saleh Ibrahim et al., 2003). PV in Cathodic protection Saleh Ibrahim et al., (2004), showed it cost $1.4 to supply one KWh of daily supply load of 15 KWh for a cathodic protection (CP) station located 5 Km from a 11 KV electric grid. Also another study showed that PV systems were more convenient and economical for the production of a daily CP load of 7.5 KWh from a distance of more than 1.2 Km from the 11 KV electric grid. This highlighted the importance and value of PV systems and hence their application. Further Future Applications PV systems in Rural Electrification In Libya rural areas face electrification problems because they are far away from the national grid and it wouldnt be economical to extend electric network to low demand areas, to this end the incorporation of PV systems would be invaluable. Currently, Libya plans to electrify rural areas consist of scattered houses, villages, and water pumping with PV systems, these Villages include; Mrair Gabis village, Swaihat village, Intlat village, Beer al-Merhan village, and Wadi Marsit village (Saleh Ibrahim et al., 2006) The installation of PV systems started in the middle of 2003. The total number of systems installed by General Electric company of Libya (GECOL) is 340 with a total capacity of 220 kWp, while the ones installed by the Center of Solar Energy Studies (CSES) and the Saharan Center are 150 with a total power of 125 KWp. The applications are: 380 systems for isolated houses, 30 systems for police stations, and 100 systems for street illumination. The total peak power is 345 KWp. PV for Water pumping The use of PV systems in Water pumping portends great advantages for rural communities as remote wells which are used to supply water for human and live stock that are located in rural places. Environment: It is worthy to note that the environmental impact of PV is less than that of any other renewable (Boyle 2004), however, concerns have been showed for toxic compounds used in the production of some PV e.g. Cadmium. Economics: From the word go, PV systems have continued to improve in cost effectiveness and if such a trend keeps up, it could become a force for contention with fossil fuels. Integration: With no medium for storing of electricity and the fluctuating nature of PV generation problems accrue over integration of PV electricity to the National grid. Although, the grid is designed to cope with massive fluctuations in demand, and similarly fluctuating supply like PV considered negative loads, analyst suggest that without large amounts of cheap electricity storage PV sources cannot make major contributions (Boyle 2004). Presently the conversion efficiency of PV cells is low (15%-30%) so this may hamper possibilities. Wind Energy Since 1940, wind energy has been utilized for water pumping in many oases. The potential of this renewable energy source has not been fully harnesses in Libya especially for powering rural communities and farms and use in irrigation. 2004 Libyan measurements of the wind speed statistics showed that there is a high potential for wind energy in Libya with the average wind speed at a 40 meter height is between 6- 7.5 m/s. The Libyan government has seen the potential in wind energy generation of electricity and have contracted the the project for use of wind energy for electricity production. This project includes the installation of a 25 MW wind farm as a pilot project. Also, a project to prepare two Atlas that provide fast access to reliable solar and wind data throughout Libya is also been contracted for. The Atlas will allow for accurate analysis of the available wind and solar resources anywhere in Libya, and will be therefore be invaluable to the planning of profitable wind farms a nd solar projects. In other to meet the target of an 80% reduction in CO2 emissions by 2050, it is imperative to tackle from source electricity generation which utilises fossil fuels by the setting up of an energy policy that seeks to ensure that energy from renewable energy sources contributes 10% to Libyas electricity demand by the year 2020. As stated above, photovoltaic has been used for small and medium sized remote applications with proven economic feasibility; however, several constraints and barriers, including costs exist. The experience of rural applications shows that there is a high potential of building large scale PV plants in the south of the Mediterranean. The potential for utilizing, home grid connected photovoltaic systems, large scale grid connected electricity generation using Wind farms, and solar thermal for electricity generation is great, with capacities of several thousands of MW. At the business end, Libya can expand its electricity generation capacities from its eneormous renewable source to meet the demands of Mediterranean countries, taking advantage of its proximity to the European energy market. This can be considered as a future plan. The potential for Solar energy resources to effectively replace oil and gas has to be harnessed. Renewable energy resources portend good opportunities for technology transfer and international cooperation. In the current Libyan energy clime, the decentralised nature of renewable energy technologies make them particularly well suited for rural energy development further enhancing use of the Clean Development Mechanism (CDM) adopted by Kyoto Protocol in renewable energy applications that wou ld reduce CO2 emissions. For Proper development of Libyan Renewable energy potential, the following have to be met: Promotion of private investment in transfer of renewable energy technology and services. Introduce renewable energy in formal education curriculum as well as Increase informal education on all energy aspects. Development of policies that support the introduction of renewables via local, national and international partnerships Courage the international investment to invest in the industry. International cooperation that seeks to aid the development and construction of large scale solar energy applications as a pilot project. Development and support, of technical, financial, and institutional, research mechanisms for sustainable development. Development of national energy policies and regulatory frameworks that would aid in the creation of the necessary economic, social and institutional conditions in the energy sector and improve access to reliable, affordable, economically viable socially acceptable and environmentally sound energy services for sustainable development. CONCLUSION Current Libyan energy policy depicts a system that lacks efficiency in the production and consumption of energy, challenge lies in the development of energy efficiency in the various sectors with several barriers including: lack of access to technology, capacity building, and institutional issues. In other to achieve energy efficiency in both energy consumption and production sides, it is imperative to incorporate renewable energy in all energy end-using sectors, the focus is on improving equipment efficiency of services, such as heating and air conditioning equipment, appliances, lighting and motors. On the supply and production side, energy management should focus on incorporation of renewable energy in energy generation, improved industrial processes, co generation and energy recovery systems. Energy efficiency can help reducing cost, preserving natural resources and protecting the environment.. Furthermore, as Libya is a non annex I country under the UNFCCC, and a signatory to the Kyoto protocol, Libya is currently eligible for the CDM. The main emitters of CO2 in 2003 are fuel combustion in the power generation sector. Libyas energy related CO2 emissions increased by more than 78% in one decade mostly due to increased energy supply and significant reduction could be achieved if improved energy utilization efficiency by the major energy sectors is encouraged. Conclusively, The Legislative Act Number 7 of 1982 concerning the protection of the environment which is Libyas biggest environmental protection act looks into a holistic plan to protect the environment, water, land, wildlife, plants, food etc from the deleterious activities of both man and nature. This piece of legislation which has a total of 11 sections and 75 articles was promulgated by the General Peoples Congress, Libyas highest executive authority. Below are the underlisted sections of this legislation: Section 1 General Provisions Section 2 Protection of the Atmosphere Section 3 Protection of Seas and Marine Resources Section 4 Protection of Water Resources Section 5 Protection of Foodstuffs Section 6 Environmental Health Section 7 Protection from Contagious Diseases Section 8 Soils and Plant Protection Section 9 Protection of Wildlife Section 10 Interim Provisions Section 11 Penalties The import of these legislation, and strict enforcements would help Libya in meeting the 2050 target of 80% reduction in CO2 emission.

Psychos in our mist :: psychopathic behavior

For most of us the idea of a psychopath conjures up images from movies like "Silence of The Lambs" and characters with names like "Hannibal Lector." Fortunately characters like Hannibal don’t really exist. Serial killers and people involved in ritual torture are rare, but psychopathic behavior is more common than you might think. I have known several psychopaths in my life. The clearest case involved an older teen who had no sense of guilt. He could learn the rules, but he had no sense of conscience. The only thing that saved him was a mother who loved him, took him to counseling for years and spent a great deal of time patiently teaching him right from wrong. I remember a conversation where he told me, "People know when something is wrong because it feels wrong. I have to remember or be reminded that stealing from someone is wrong. I don’t feel bad if I take something." Meeting this young boy changed my opinion of a psychopathic personality. Why? Because children with this condition are "emotionally blind." And while I do not excuse cruelty or criminal behavior, I have sympathy and appreciate how hard it is for some people to learn how to act responsibly. Without help, potentially psychopathic children will become adults who never remain attached to anyone or anything for long. They may end up living a "predatory" lifestyle, feeling little or no regret, and having little or no remorse - except when they are caught or about to be locked up. A psychopath is not necessarily a bad person. But they are prone to have problems with society, rules, expectations and relationships. A psychopath will use people for excitement, entertainment, to build their self-esteem and they invariably value people in terms of their material value (e.g. money, property, comfort, etc..). They can involve and get other people into trouble quickly and they seem to have no regret for their actions. To date there is no checklist of behavior and symptoms that will tell you with certainty whether or not a person is a psychopath. But there are warning signs. The following warning signs are based on my experience but primarily research conducted by Robert Hare, Ph.D - the leading expert on the Psychopathic Personality. Characteristics of a Psychopath superficial charm self-centered & self-important need for stimulation & prone to boredom deceptive behavior & lying conning & manipulative little remorse or guilt

Love/Hate Othello Essay

In love comes an exponentially vast array of emotions that can all show themselves at one time or another. One of those emotions that comes with love is hatred. Walter Raleigh once said, â€Å"Hatreds are the cinders of affection.† If you can find feelings of hate towards someone you love, it is because you truly love them. This is why Othello has so much hate towards Desdemona in act III. In act III, Iago plants the thought in Othello’s head that his wife, Desdemona, is having an affair with Cassio. Iago acts reluctant to answer Othello when he asks him if he feels Cassio is trustworthy, but it is all a performance put on to get in Othello’s head. Thoughts race through Othello’s head on why Desdemona would ever cheat on him, bringing out his deepest insecurities. Haply for I am black, And have not those soft parts of conversation That chamberers have; or for I am declined Into the vale of years—yet that’s not much— She’s gone. I am abused, and my relief Must be to loathe her. O curse of marriage, That we can call these delicate creatures ours And not their appetites! I had rather be a toad And live upon the vapor of a dungeon Than keep a corner in the thing I love For others’ uses. Yet ’tis the plague of great ones; Prerogatived are they less than the base. ’Tis destiny unshunnable, like death. (III.iii.267–279) The thought of these self proclaimed â€Å"flaws† makes him bring up feelings of anger and hatred, making him question if Desdemona ever truly loved him or lied to him all along. However, deep down, he still has nothing but love for her. Othello only wants to kill Desdemona and not Cassio because he feels as if she betrayed him. There was never any real relationship between Cassio and Othello aside from the military, so he doesn’t feel the same hatred towards him as with Desdemona. Othello feels that if he is not worthy to be with Desdemona, then nobody is. He loves her so much that he wants her all to himself. Selfish? Yes. Does it mean Othello doesn’t love Desdemona? No, the exact opposite. It is his great love for Desdemona which drives him to do such crazy things and have such insane thoughts. In the end, regardless of his actions, Othello loves Desdemona with all of his heart. Never before this was there any trouble in their marriage, only romantic, gleeful times. This shows that hatred and love can, in fact, coexist. Hatred and love may be polar opposites, but as they say, opposites attract.

The Membrane essays

The Membrane essays The membrane has a double lipid layer through which fat- soluble substances will move, by passive transport or diffusion. The molecules will only move through if they are small enough. There are globular protein regions, which are hydrophilic. These regions allow water and water soluble substances through, but only if they are small enough, for example starch grains are too big. These substances move through by passive transport or diffusion. Diffusion is the passive movement of substances from a high concentration to a low concentration ( N.B., you don't need a membrane present, e.g. diffusion occurs in the air). In CONTRAST, diffusion of water across a semi- permeable membrane is called OSMOSIS. Active transport requires energy from ATP, and involves carrier molecules studding the membranes. The carrier combines with the molecule on the outside, which requires ATP. It then moves across, (which also requires ATP), and returns. An example is glucose being transported by active transport by insulin. Why is it called the Fluid Mosaic Model? Fluid- it is called a fluid because proteins are said to wander through the membrane (hence fluid) Mosaic- it is a mosaic because it is a collection (or mosaic) of structures Model- because no matter how real the diagram looks, it is not real. Therefore, it is a model. SO you put all three bits together and you get. FLUID MOSAIC MODEL! YAY!!!!!! ...

WATER IN EGYPT essays

WATER IN EGYPT essays Water was more important to the development of a working civilization in Ancient Egypt than Mesopotamia for the following reasons: irrigation, drinking, resources and trade. Although these factors were used by both Egypt and Mesopotamia, the latter had a better understanding and control over water than Mesopotamia. Mesopotamia (3500 B.C.E. - 530 B.C.E.) was located in northeast Syria, which is now know today as Iraq. It was mainly surrounded by water, most notably the Tigris and Euphrates rivers, which is how it adopted its name the land between the rivers. Luckily it was also located on the site of some of the worlds first permanent farming villages. The land and climate within these regions was not the best area for the development of a working civilization, as the South was primarily flat flood plain. Flooding was the Mesopotamia peoples main problem, based on a lack of knowledge on how to deal with them. The floods were unpredictable, and created hazards to the settlements situated near the rivers, such as destruction of land and housing. Based on the constant floods travel and communication were also hindered by the flooding. After many civilizations were conquered, the people of Mesopotamia finally learned to control the floods in the South and used their acquired knowledge to drain the land and irrigate the soil. This in turn lead to the people of the region producing many different types of food, and contributing to their striving civilization. By this time their reign was almost coming to an end, and was relatively useless to them. Water was never used to the best advantage by Mesopotamia. They were unable to control flooding or to develop adequate drainage, therefore it was of limited use to them. Ancient Egypt (3100 B.C.E. - 395 B.C.E.), just as Mesopotamia, developed around a large river. This river was and still is know as The Nil...

Issues In Financial Reporting Essay Example | Topics and Well Written Essays - 2000 words

Issues In Financial Reporting - Essay Example IASC has seven members which "have formal liaison responsibilities with the national standard-setters in their respective countries" (Carrol and Dixon, 2003). These countries are the United States, Canada, the United Kingdom, France, Germany, Japan, Australia and New Zealand (the last two being represented by the same liaison member). Earlier the Australian Financial Reporting Council supported the policy of international harmonization in the sphere of accounting standards; Australian government launched one of the most effective programs of compliance with the IFRS in the world; at the same time Australia had a very developed accounting system which allowed to effectively monitor the firm's condition. However, recently the Australian Financial Reporting Council (AFRC) proclaimed the policy of adoption of IFRS. Such radical change has caused a lot of debates whether this decision will be a benefit to Australia or will worsen its position. This essay is dedicated to analysis of advantages and disadvantages of the AFRC's decision. Since globalization is one of the main tendencies in international economy, the interaction between Australian companies and foreign firms is increasing. It is common knowledge that volumes of international trade are growing rather in geometrical than in arithmetical progression. The countries which will be the first to open their economies to international trade, will receive the chance for significant economical growth. One of the necessary demands of international trade is the compliance of accounting standards and maximal ease of financial reporting. Adoption of IFRS, according to Collett et al. (2001), will lead to the increase of capital flow to the national market, and will also give the possibility to export the capital to other countries with lower cost for this and with simplified procedure. On one hand, these arguments are evident; the increased flow of capital is likely to benefit economical growth of the country. On the other hand, the expansion of foreign capital means a challenge to the national companies; it can also be doubted that national capital will quickly flow to other countries; this can be true only for countries with less developed economical and financial system than the Australian one. In my opinion, it is difficult to determine whether this argument belongs to advantages or disadvantages of IFRS adoption since the flows of capital depend on many other factors. 1.2. Improvement in capital market efficiency There exists an opinion that adoption of IFRS will lead to better accuracy of capital pricing and to higher efficiency of Australian

Behavior in Higher Mammals Essay Example | Topics and Well Written Essays - 2500 words

Behavior in Higher Mammals - Essay Example They achieved a balance between molecular work, on the one hand, and anatomical and paleontological2 work on the other hand making them the higher amongst the all mammals found. Scientists say placental mammals are the most prominent mammals in the world today. Realizing the biggest category of the mammals we need to understand the ways in which we could observe them. Various precautions have to be taken before beginning with this activity. Some the things that have to be studied are It would be easy to observe domestic mammals in the beginning if you are not equipped with complete biological exploring4 kit. If you have a large team and resources you can go out and observe them in open settings else placental mammals can be started with to begin the study. Some of the placental mammals include rats, squirrels, rabbits, elephants, horses, lions, tigers, pandas, pigs, sheep, dolphins, whales, as well as humans and other primates. So we can begin our study by choosing the mammals we can have control over like rats, squirrel, pig, sheep, dolphins because they might be too friendly about your observation activity. So being precautious friendly mammal has to be chosen before you become expert with the technique of observing mammals. (According to Frost, PWS and the Gulf of Alaska (GOA)) Some o... Various precautions have to be taken before beginning with this activity. Some the things that have to be studied are We need to study the eating habits of the mammal. Realization of its food chain and biome3 is most necessary. Categorization into domestic and free mammal has to be realized. If one chooses to observe a mammal in a natural and semi natural surroundings one has to get knowledge about their foot marks their smell and things which attract them. Gulati Peeyush 2007 Keen observations have to be made depending upon the environment we have chosen to make observations. It would be easy to observe domestic mammals in the beginning if you are not equipped with complete biological exploring4 kit. If you have a large team and resources you can go out and observe them in open settings else placental mammals can be started with to begin the study. Some of the placental mammals include rats, squirrels, rabbits, elephants, horses, lions, tigers, pandas, pigs, sheep, dolphins, whales, as well as humans and other primates. So we can begin our study by choosing the mammals we can have control over like rats, squirrel, pig, sheep, dolphins because they might be too friendly about your observation activity. So being precautious friendly mammal has to be chosen before you become expert with the technique of observing mammals. (According to Frost, PWS and the Gulf of Alaska (GOA)) Some of the richest marine mammal fauna in the world: 21 species are currently known to live in these waters, of these 21, four species - the harbor seal, the killer whale, the sea otter, and the stellar sea lion - would likely be the easiest and most useful to monitor. So if you are technologically