1/24/2020 0 Comments Preservation of Biodiversity Essay Example | Topics and Well Written Essays - 250 wordsPreservation of Biodiversity - Essay Example In pre-Colombian times, this area supported an estimated 700,000 persons (a multiple of todays population) in a sustainable form†(Lutz, n.d.). Interest of human beings needs to be served first. All countries should not be held to the same standards in the preservation of endangered habitats and species because different countries have different levels of economic strength, and socioeconomic and political issues. It is not practicable to establish same standards of preservation in all countries because different countries give different priority to the conservation of biodiversity, and the stance of individual nations is governed by their cultural and religious beliefs, that often vary across nations. Traditional practices such as whaling and killing wildlife for ivory, tiger bones, and rhinoceros horns, etc. are not justifiable because there are better alternatives to these which are not only environment friendlier but also good for the well-being of animals. Conventionally, bones retrieved from animals have been of little to no use for humans. Mostly, these bones have been used for ornamental purposes which can be lived
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12/25/2019 0 Comments Process of Heating the Water Assignment Example | Topics and Well Written Essays - 750 wordsProcess of Heating the Water - Assignment Example The heater design is made on certain assumptions being – (1) steady state rate of heat transfer (or that heat transfer rate is constant with time); (2) the cylindrical structure allows thermal symmetry so that the transfer of heat occurs merely on one dimension and varies not along the axial direction; (3) the metallic composition of the water tank (having thin metal sheet of stainless steel) on the inside possesses negligible thermal resistance; (4) thermal conductivities are uniform throughout the heating process; and that (5) very negligible heat losses take place on surfaces at the top and at the bottom.Among the available insulating materials in the market, the ‘foam’ is chosen for its affordability and low cost of installation. Compared to the other prospected insulators, its thermal conductivity appears to have given the most reasonable values for the length and surface area of the heater via R-equation, while others came out with lengths that converge to the value of the corresponding outer radius which is not likely in the actual. During the process of heating the water, every 500-W increment is dissipated through the insulated tank wall so the increase of power input ought to be compensated with the addition of foam with relative thickness so as to prevent unnecessary heat loss until the water has achieved the desired temperature at 65°C. Stainless steel is preferred to carbon steel or some other steel alloys due to the fact that it potentially resists corrosion over considerable time period.
12/19/2019 0 Comments The Alamo :: essays research papers To understand the real battle, one must appreciate its strategic context in the Texas Revolution.qv In December 1835 a Federalist army of Texan (or Texian,qv as they were called) immigrants, American volunteers, and their Tejanoqv allies had captured the town from a Centralist force during the siege of Bexar.qv With that victory, a majority of the Texan volunteers of the "Army of the People" left service and returned to their families. Nevertheless, many officials of the provisional governmentqv feared the Centralists would mount a spring offensive. Two main roads led into Texas from the Mexican interior. The first was the Atascosito Road,qv which stretched from Matamoros on the Rio Grande northward through San Patricio, Goliad, Victoria, and finally into the heart of Austin's colony. The second was the Old San Antonio Road,qv a camino real that crossed the Rio Grande at Paso de Francia (the San Antonio Crossingqv) and wound northeastward through San Antonio de Béxar, Bastrop, Nacogdoches, San Augustine, and across the Sabine River into Louisiana. Two forts blocked these approaches into Texas: Presidio La BahÃa (Nuestra Señora de Loreto Presidio) at Goliad and the Alamo at San Antonio. Each installation functioned as a frontier picket guard, ready to alert the Texas settlements of an enemy advance. James Clinton Neillqv received command of the Bexar garrison. Some ninety miles to the southeast, James Walker Fannin, Jr.,qv subsequently took command at Goliad. Most Texan settlers had returned to the comforts of home and hearth. Consequently, newly arrived American volunteers-some of whom counted their time in Texas by the week-constituted a majority of the troops at Goliad and Bexar. Both Neill and Fannin determined to stall the Centralists on the frontier. Still, they labored under no delusions. Without speedy reinforcements, neither the Alamo nor Presidio La BahÃa could long withstand a siege. At Bexar were some twenty-one artillery pieces of various caliber. Because of his artillery experience and his regular army commission, Neill was a logical choice to command. Throughout January he did his best to fortify the mission fort on the outskirts of town. Maj. Green B. Jameson,qv chief engineer at the Alamo, installed most of the cannons on the walls. Jameson boasted to Gen. Sam Houstonqv that if the Centralists stormed the Alamo, the defenders could "whip 10 to 1 with our artillery." Such predictions proved excessively optimistic. Far from the bulk of Texas settlements, the Bexar garrison suffered from a lack of even basic provender.
Library Automation Essay
An OPAC (Online Public Access Catalog) is an online bibliography of a library collection that is available in certain libraries for the use of the public. With the aid of the Internet, most libraries have made the OPAC accessible from a server to users all over the world. The OPAC is an online database of materials used by a library or group of libraries. Users search the library catalog mainly to locate books and other materials physically located at a library. The concept of OPAC has changed the previous system used in most libraries and how the people have gained access for information and materials. OPAC is also the key to finding books and other materials in the library. When you are looking for a book you will find that knowing to use OPAC properly will help you find the materials that you need. There are a lot of advantages of OPAC. To use the OPAC system is very easy. A person does not have to be a skilled computer user to use the system. What the person need is just to know what a computer mouse is, can use it to point and click, is just all the computer skill a person needs. The access points or search capabilities are by using keyword, subject, author or title to find the materials. It is easy to use since the users just need to enter access point in order to locate any materials in the library. So, students can find books and materials needed easily. It will also save their time. By using this system, the materials that we want to find will become instant information. Moreover, by using the OPAC, the students can find more detailed information about the materials that they need. As such, if the students find the books by typing the author’s name in the OPAC system, the information that possibly will appear on the screen are how many volume the books have or how many number of that books the library have. Besides that, the students can learn something new about technology and modern invention. |