U.S Drones free essay sample

It could potentially help find lost hikers in mountains, It could help follow suspects and SSP on them without them knowing. This although raises a lot of questions from citizens, because it invades there privacy. Americans dont want this, because not only are they being invaded of their privacy but they are feel somewhat threatened. Threatened because these same similar drones are the ones used overseas to attack enemies of the state. These drones do have the ability to help local, state and federal law enforcements, n order to make everything quicker, cheaper, and safer. This could plan could help out in all sorts of domestic problems, whether its anything from a shooting to a natural disaster. It would make mobility quicker, and also be able to pinpoint certain desired locations without a problem. It could help solve crimes, bring down the crime rate and at the same time, save lives because the drones are unmanned and inexpensive that compared to the man flying planes. We will write a custom essay sample on U.S Drones or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The technology is evolving faster than the law, points out the flaw of the drone. The act and use of these drones are held back because of its unethical use.The people believe it will be crossing the line and lead to criminal trespassing, and break privacy laws. The FAA is the group responsible to make licenses, regulation, and conduct the proper order of business with these drones. They have until September 201 5 to have regulation put in place so It can officially start. Civil liberty groups have been protesting to these unjust decisions by the government. These liberty groups can be classified under the political linkage cause they are parties, groups with some political influence that are trying to get there point across to the government, so that something can be done.The structure that supports the political linkage is the fact that Americans do not agree and do not feel its right. So the push for a more justified way of going about with this drone situation, the civil liberty groups, political linkage, have been able to influence some people within Congress, Government. In Congress, Reps. Ted Poe (R-Texas) and Zoe Aloofer (D-San Jose) Introduced privacy legislation Thursday that would require Alice to get a warrant or a court order before operating a drone to collect 1 OFF this and government action. Threw all these actions that are occurring about with the drones, I was able to set up a framework to show the flow of how something can be done in this American Democracy. This article informs people of the situation by describing both sides of pros and cons while advocating for the possible Justification in using drones to help law enforcement agencies do there Job better and more efficiently. It has all the right intentions to do so.

The eNotes Blog Big Brother, Where ArtThou

Big Brother, Where ArtThou Oh yes, there you are, with your party hat on. What with the recent NSA scandal, George Orwells dystopian caution that Big Brother is watching you has never seemed so relevant. In fact, sales of 1984 skyrocketed just after news broke that the US government was tapping into your average Verizon members mundane phone calls. So, how better to celebrate Orwells birthday this week than by a subtle nod to the constant gaze of the Partycomplete with party hats? Such was the idea of the Dutch artist duo Thomas Voort Hekke and Bas van Oerle (known collectively as FRONT 404). Their simple concept was to decorate the ubiquitous security cameras of Utrecht with eye-catching birthday hats. I think its both a great reminder to the public that eyes are on you at basically all times (not saying thats a bad thingjust something to be aware of) and a fun way to honor the late Orwell. What do you think? Big Brother is watching YOU Images courtesy of junk-culture.com. Looking for more Big Brother fun? Check out our 1984 study guide and free chapter and character quizzes.

Organizational Design, Culture, and Adaptation Essay - 2

Organizational Design, Culture, and Adaptation - Essay Example The internal factors that were considered during the restructuring and reengineering were mostly comprised of the attitudes that the employees had on a day to day basis. The external factors were mostly to do with the patients, who were essentially the customers for the sake of the hospital facility. The healthcare manager, therefore, suggested that these two factors formed the very core of knowing where anomalies were coming in and how these needed to be resolved at the earliest and without much hassle. The transformation came about due to the changing attitudes of the employees (the internal factor), which was the reason why the transformation was required in essence. The external factors were given similar importance because the patients are the basis of any hospital’s long term success. If they are contented, then this means that the healthcare facility is doing well but if these are not, and as the healthcare manager suggests, then there is much to learn on the part of al l and sundry. This outlines how well the hospital facility has been able to rein in commitment towards its transformation. The healthcare manager faced quite a few obstacles and barriers in the beginning when the restructuring and re-engineering aspects were outlined in essence. This meant that he needed to face them, analyze them and turn them in his own favor with the passage of time. There were attitudinal problems that the healthcare manager talked about with the internal domains not being beefed up properly.

Explication of a poem Essay Example | Topics and Well Written Essays - 500 words

Explication of a poem - Essay Example This is evident in the line â€Å"I’ve known rivers†. The line that says he â€Å"bathed in the Euphrates when dawns were young† symbolizes that this struggle is as old as the civilization of Euphrates. River is not just the body of waters here but rather symbolic of the long and continuing struggle of the Negroes. Langston Hughes may have spoken about the river in the poem but this poem does not literally talked about the idyllic or the pastoral quietness of the river but rather the deep struggle that they have been. â€Å"The Negro Speaks of Rivers" is actually a political statement of a Negro of his struggle often beset by discrimination and injustice that had gone too long that it already ran deep like the river. The depth of the river or their struggle is not only long in terms of history beginning from the ancient time but also the pain that it can caused them. The setting of the poem was also carefully chosen. Why Euphrates and Congo, the Nile and the pyramids above it suggesting that it is Egypt? Why not California or better yet the South region of America where discrimination and oppression was notorious? It is because these are old civilizations where the Negro came from, indicating that he is capable of greatness as the Nile and the pyramids if only not on the bondage that was imposed on him by the white man. So much so that when the river went down to New Orleans, it became muddy indicating that the Negro was free as the river until it reached New Orleans where he is enslaved. The setting of the poem is more than geography, it is a representation of the objects of Langston Hughes topic that he would like to talk about. The poem is spoken by an old soul who had â€Å"bathed in the Euphrates when dawns were young† and that he knew â€Å"Ancient, dusky rivers†. He is not just a regularly old person but an ancient sage

Illegal Immigration Essay Example | Topics and Well Written Essays - 1000 words

Illegal Immigration - Essay Example These people who make the entry are known as immigrant (Immigrant Assist, 2012). An immigrant who enters another country without going through the laid down laws therefore becomes an illegal immigrant. In the United States of American and in all legal jurisdictions around the world, illegal acts are offensive and punishable by law. For this reason, the fact that a person is touted as an ‘illegal’ immigrant alone renders the fellow an offender. Presently, there are very strict laws that prescribe various forms of punishments for people who are caught to be illegal immigrants. As a way of fighting against illegal immigration also, there are a lot of restrictions that have been put on people in the country who are not legal residents. Generally, the debate continues as to what should be done to people who are caught to be illegal immigrants. PROPONENTS Proponents of this debate argue on two major reasons why illegal immigrants should not be punished by the law. First, they argue on humanitarian grounds stating that people would generally travel to the United States of America by crook means because of the need to make greener pastures and alleviate themselves from the hardships they face in their countries. From a humanitarian perspectives therefore, these proponents advocate tempering justice with mercy. There also is an argument by the proponents that illegal immigrants contribute largely to the economy of the United States of America through their trade and other economic activities and thus the need to allow their integration into the United States population. In the light of the growing debate, there have been formal studies and research to confirm the quantitative contribution of illegal immigrants to the economy of the United States. For instance the White House Council of Economic Advisors (2007), reports that â€Å"U.S. natives gain an estimated $37 billion a year from immigrants’ participation in the U.S. economy, according to the Pr esident’s Council of Economic Advisors† (Drum Major Institute, 2012). This figure is by no means a small amount of money to the economic growth of the United States. For each illegal immigrant that is expelled from the country therefore, there is a percentage of this amount that is lost to the United States economy. OPPONENTS There are also those who do not agree that illegal immigration should be entertained. In the view of these opponents, illegal immigrants should continue to be sanctioned and expelled from the United States of America. These opponents argue on two major grounds. The first has to do with the argument of security reasons whiles the second has to do with improper national planning policy. First, it is argued that the continuous stay of people whose information cannot be accounted for constitutes a major security threat to the country. Especially as it is becoming clear that the United States is having more and more international enemies, it is always i mportant that authorities in the country can monitor each and every resident and their activities. However, this is not possible if people enter the country illegally or overstay their visa dates. Again, because the country does not have any formal information on illegal immigrants, it becomes very difficult to include them in national planning

Sodium Alginate and Polymer Drug Delivery Systems

Sodium Alginate and Polymer Drug Delivery Systems Sodium alginate is a hygroscopic material, although, stable at low humidities and at cool temperatures. Aqueous solutions of sodium alginate are most stable at ph 4-10. Below ph3, alginic acid is precipitated. Sodium alginate solutions are susceptible to microbial spoilage during storage, which may effect on solution viscosity. Subsequent loss of viscosity due to depolarization was observed when sodium alginate was heated above 70Â °c. Preparations containing sodium alginate for external use may be preserved by the addition of 0. 1% chlorocresol, chloroxylenol, or parabens and if the medium is acidic, benzoic acid may be used. Bulk material should be stored in an airtight container in a cool and dry place. Sodium alginate is incompatible with acridine derivatives, crystal violet, phenyl mercuric acetate and nitrate, heavy metals and ethanol in concentrations greater than 5%w/v. Low concentrations of electrolytes cause an increase in viscosity but high electrolyte concentrations causing salting out of sodium alginate; salting out occurs if more than 4% of sodium chloride is present. Sodium alginate is used in variety of oral and pharmaceutical formulations. In tablet formulations, sodium alginate may be used as both a binder and disintegrant. It has also been used as a diluents in capsule formulations and also been used in the preparation of sustained release oral formulations, since it can delay the dissolution of a drug from tablets, capsules and aqueous suspensions. Recently, sodium alginate has been used for the aqueous microencapsulation of drugs in contrast with the more conventional microencapsulation techniques which use organic solvent systems. It has also been used in the formation of nanoparticles. The adhesive nature of hydrogels prepared from sodium alginate has been investigated and the drug release from oral mucosal adhesive tablets based in sodium alginate has been reported. Hydrogel systems containing alginates have also been investigated for delivery of proteins and peptides. Therapeutically sodium alginate has been used in the combination with an h2 receptor antagonist in the management of gastroesophageal reflux and as a haemostatic agent in surgical dressings. Alginate dressings, used to treat exuding wounds often contain significant amounts of sodium alginate as this improves the gelling properties. Sodium alginate is also used in cosmetics and food products at concentrations given in table 4 Safety Sodium alginate is widely used in cosmetics, food products, and pharmaceutical formulations, such as topical products, including wound dressings. It is generally regarded as a nontoxic and non-irritant material, although excessive oral consumption may be harmful. The WHO has not specified an acceptable daily intake for alginic acid and alginate salts as the levels used in foods do not represent a hazard to health. Handling precautions. Sodium alginate may be irritant to eye or respiratory system if inhaled as dust;eye protection, gloves, dust respirator are needed while handling. Sodium alginate should be handled in a well ventilated environment. Related substances The various substances related to sodium alginate include alginic acid, potassium alginate, calcium alginate, propylene glycol alginate. CHITOSAN Chitosan is a derivative of chitin and it is a unique polysaccharide and hydrophilic polymer. Non Proprietary Names BP: Chitosan hydrochloride Ph Eur : Chitosan hydrochloridum Chemistry Preparation The principle derivative of chitin, namely Chitosan (C6H11O4N)n is a unique polysaccharide and hydrophilic polymer which is taken from the chitin, a polysaccharide found in exoskeletons of crustaceans. it is processed by removing the shells from shellfish such as shrimp, lobusters and crabs. The shells are then ground into a pulverous powder. This powder is then deacetylated. This involves boiling chitin in concentrated alkali (50%) for several hours. This will yield chitosan with a degree of acetylation between 20-30%, the most popular commercial form of Chitosan. In such a chitosan, the acetyl groups are uniformly distributed along the polymer chain. This is in contrast with the Chitosan of similar degree of acetylation, but isolated from fungal cell walls in which the acetylresidues are grouped into clusters. Special chemical treatments are required to obtain completely de-acetylated forms of chitosan. CHITIN Functional category It is used as a coating agent; disintegrant; film forming agent; mucoadhesive, tablet binder; viscosity increasing agent etc. Chemical character Chitosan is a cationic polyamine with a high charge density at ph The amino group in chitosan has a pka value of approximately 6. 5, thus chitosan is positively charged and soluble in acidic to neutral solution with a charge density depend on ph and the %da. Numerous studies have demonstrated that the salt form, molecular weight, and degree of deacetylation as well as ph at which chitosan is used all influence how this polymer is utilized in pharmaceutical application. Chitosan is incompatible with strong oxidising agent. Typical properties Chitosan is a cationic polyamine with a high charge density at ph Acidity / alkalinity pH=4-6(1%w/v aqueous solution) Density 1. 35-1. 49g/cm3 Particle size distribution Stability and storage conditions Chitosan is a stable material at room temperature although it is hygroscopic after drying. Chitosan should be stored in a tigjtly closed container in a cool and dry place. Incompatibilities Chitosan is incompatible with strong oxidizing agents. Safety Chitosan is being investigated widely for use as an excipient in oral and other pharmaceutical formulations. It is also used in cosmetics. chitosan is generally regarded as biodegradable, nontoxic and non irritant material. it is biocompatible with both healthy and infected skin. Applications Chitosan is found useful in many fields like sustained drug delivery, components of mucoadhesive dosage forms, rapid release dosage forms, improved peptide delivery, colonic drug delivery systems and use for gene delivery. Chitosan is processed into several pharmaceutical forms including gels, beads, films, microspheres tablets and coatings for liposomes. PROPRANOLOL HYDROCHLORIDE (ÃŽÂ ²-adrenergic blocking agents) Adrenergic nonselective ÃŽÂ ²-receptor antagonist. (antihypertensive, antianginal and antiarrhythmic. ) STRUCTURE Chemical name (ÂÂ ±)-1-isopropylamino-3-(1-naphthyloxy) propan-2-ol hydrochloride Molecular formula C16H21NO2. HCl Molecular weight 295. 8 Description: A white powder, odourless and bitter in taste Solubility: Soluble Soluble 1 in 2 of water and ethanol Slightly soluble in chloroform I . PHARMACOLOGICAL ACTIONS a. Cardiovascular-Propranolol diminishes cardiac output, heart rate, and force of contraction. These effects are useful in the treatment of angina. b. Peripheral vasoconstriction-Blockade of ÃŽÂ ²-receptors prevents ÃŽÂ ²2-mediated vasodilation. The reduction in cardiac output leads to decreased blood pressure. c. Bronchoconstriction-Blocking ÃŽÂ ²2 receptors in the lungs of susceptible patients causes contraction of the bronchiolar smooth muscle. Î’-blockers are thus contradicted in patients with asthma. d. increased Na+ retention-reduced blood pressure causes a decrease in renal perfusion, resulting in an increase in Na+ and plasma volume. in some cases this compensatory response tends to elevate the BP. For these patients, ÃŽÂ ²-blockers are often combined with a diuretic to prevent Na+ retention. II. THERAPEUTIC EFFECTS a. Hypertension-propranolol lowers BP in hypertension by decreasing cardiac output. b. glaucoma-propranolo is effective in diminishing intraocular pressure in glaucoma. c. migraine-propranolol is also effective in reducing migraine episodes by blocking the catecholamine induced vasodilation in the brain vasculature. d. angina pectoris-propranolol decreases the oxygen requirement of heart muscle and therefore effective in reducing the chest pain in angina. e. myocardial infarction-propranolol and other ÃŽÂ ²-blockers have a protective effect on the myocardium. thus, patient who have had one myocardial infarction appear to be protected against a second heart attack by prophylactic use of ÃŽÂ ²-blockers. III. ADVERSE EFFECTS a. broncho constriction-when propranolol is administered to an asthmatic patient, an immediate contraction of the bronchiolar smooth muscle prevents air from entering the lungs. Therefore, propranolol must never be used in treating any individual with obstructive pulmonary disease. b. arrhythmias-treatment with the ÃŽÂ ²-blockers must never be stopped quickly because of the risk of precipitating cardiac arrhythmias. c. disturbances in metabolism- ÃŽÂ ² bloackade leads to decreased glycogenolysis and decreased glucagon secretion. d. drug interaction-drugs that interfere with the metabolism of propranolol, such as cimetidine, furosemide and chlorpromazine may potentiate its antihypertensive effects. conversely those that stimulate is metabolism, such as barbiturates, phenytoin and rifampicin can mitigate its effects. PHARMACOKINETICS Propranolol is well absorbed after oral administration but has low bioavailability due to high first pass metabolism in liver. it is highly bound to plasma proteins. Metabolism of propranolol is dependent on hepatic blood flow. DOSE Oral 10mg BD to 10mg QID (average 40-60mg/day) I. V 2-8mg injected over 10min with with constant monitoring. it is not injected S. C or I. M because of irritant property. MATERIALS NAME OF THE MATERIALS NAME OF THE COMPANY Propranolol hydrochloride Sodium alginate AR Hi-Media biosciences Ltd, Mumbai. Calcium chloride AR S. D Fine chemicals Ltd, Mumbai Barium chloride AR Qualigens Fine Chemicals Ltd, Mumbai Chitosan AR Fluca Biochemicals Ltd, Switzerland. (Viscosity 200-400 mPa. s) Acetic acid EQUIPMENTS USED Name of equipment Name of company UV/Vis Spectrophotometer JASCO V-530 IR Spectrophotometer Jasco-FT-IR 8201 PC Differential scanning calorimeter DSC-60 (Shimadzu, Tokyo, Japan) Optical Microscope and Stage Micrometer Erma. Japan Scanning Electron Microscope JSM 6400 x-ray diffractrometer Bruker AXS D8 Dissolution apparatus Electrolab TDT-08L, USP XXIV Type I Apparatus. Chennai Remi Hi-speed motor Universal motors. Mumbai Digital balance Denver Instruments 18002098899 simi INTRODUCTION MICROENCAPSULATION A process in which very thin coatings of polymeric materials are deposited around particles of solids or droplets of liquid. Different terms for solid particle systems are employed in drug delivery among them pellets, beads, microcapsules, microspheres, millispheres are few. The terminologies of most relevant multiparticulate systems are provided here. Pellets can be defined as Small, free flowing spherical particles manufactured by agglomeration of fine powders or granules of drug substances and excipients using appropriate processing equipment. The size of these particles rae usually between 0. 5 and 1. 5mm. sphericity and intra granular porosity are the two important quality attributes of pellets. The terms spherical granules and beads have been applied interchangeably to pellet system. Microspheres are solids approximately spherical particles ranging in size from 1 to 1000ÂÂ µm. They are made of polymeric, waxy, or other protective materials, that are biodegradable synthetic polymers and modified natural products such as gums, proteins, waxes etc. Microsphere: the enbtrapped substance is dispersed throughout the microsphere matrix. Microcapsule: the entrapped substance is completely surrounded by distinct capsule wall. The similiarities between microsphers and microcapsules are clear and illustrations of these particles are shown in Fig: Encapsulation methods Two major classes of encapsulation methods have evolved, viz chemical and physical. The first class of encapsulation involves polymerisation during the process of preparing the microcapsules. examples of this class are usually known by the name of interfacial polymerisation or in situ polymerisation. The second type involves controlled precipitation of a polymeric solution where in physical changes usually occur. The precipitation and or gelation listed in table cover many techniques. one example isthe precipitation of water soluble polymers such as gelatin with water miscible solvents such as isopropranol. other examples include the precipitation of ethyl cellulose from cyclohexane agin by cooling, and gelation of sodium alginate with aqueous calcium salt solutions. in all cases the objective is to precipitate a performed polymer around the core (sometimes a multi-particulate) to cause encapsulation. Process Coating material Suspended medium Interfacial polymerization Water soluble and insoluble monomers Aqueous/organic solvents Complex coacervation Water soluble polyelectrolyte Water Simple coacervation Hydrophobic polymers Organic solvents Thermal denaturation Proteins Organic solvents Salting out Water-soluble polymer Water Solvent evaporation Hydrophilic or hydrophobic polymer Organic or Water Hot melt Hydrophilic or hydrophobic polymer Aqueous/organic solvents Solvent removal Hydrophilic or hydrophobic polymer Organic solvents Spray drying Hydrophilic or hydrophobic polymer Air, nitrogen Phase separation Hydrophilic or hydrophobic polymer Aqueous/organic solvents POLYMER BASED DRUG DELIVERY SYSTEM There has been growing interest in polymer based bioadhesive drug delivery systems. one of the goals of such systems is to prolong the residence time of a drug carrier in the Gastro Intestinal tract(GIT). The bioadhesive bond can be of a covalent, electrostatic, hydrophobicor hydrogen bond nature. ionic polymers are reported to be more adhesive than neutral polymers, and an increased charge density will also give better adhesion suggesting that the electrostatic interactions are of great importance. except for the oesophagus, the entire GI tract including the stomach is covered with a continous layer of insoluble mucus gel. The mucus gel mainly consists of glycolproteins and due to their content of ester sulphate and sialic acid groups, the mucus layer has an overall strong net negative charge. The mucus layer has been considered as a possible site for bioadhesion and drug delivery by several groups. Natural polymers Recently, the use of natural polymers in the design of drug delivery formulation has received much attention due to their excellent biocompatibility, biodegradability, non toxicity and easy in availability. Polymers as carriers used in drug delivery system The different types of polymers for extended release preparations are given below. Biodegradable polymers The biodegradable polymers comprised of monomers linked to one another through functional groups and have unstable linkages in the backbone. They are biologically degraded or eroded by enzymes or generated by living cells. Natural Albumin, alginate, collagen, starch, chitosan, dextran, casein, gelatine, fibrinogen etc. Synthetic Polyalklyl-cyanoacrylate, poly ethyl cyano acrylate, poly amino acids, poly amides, poly acryl amides etc. Aliphatic polyesters Poly(maleicacid), poly (glycolic acid), poly(hydroxyl butyrate), poly (lactic acid), poly vinyl alcohol(PVA) etc. Non-biodegradable polymers Poly ethylene vinyl acetate(EVA), poly ether urethane(PEU), cellulose acetate, poly vinyl chloride(PVC), ethyl cellulose etc. In recent years a lrge number of biodegradable polymers have been investigated for their potential use as drug delivery systems. among them, sodium alginate and chitosan are very promising and have been widely exploited in pharmaceutical industry for sustained drug release. polysaccharides such as alginic acid, agar, chitin and chitosan have been used to agglomerate drugs for controlled drug delivery systems. Chitosan is a anaturally occurring polysaccharide comprosing of glucosamine and N-Acetyl glucosamine with unique poly cation characteristics. The polycationic nature of chitosan leads to a strong interaction with negatively charged alginate. when alginate is dropped into chitosan solution, the electrostatic interaction of carboxylic groups of alginate with the amino groups of chitosan results in the formation of a membarane on the surface of sodium alginate and improves the stability and drug content. This process has been widely used in the preparation of alginate chitosan membaranes with a solid calcium-alginate gel core. There are many advantages of the chitosan coating, such as the improvement of drug loading and bioadhesive property, as well as the prolonged drug release properties etc. Alginate(ionic, hydrophilic polymer) is a negatively charged polysachharide with high charge density and has been reported to be bioadhesive. among polyanionic polymers, alginate has been widely studied and applied for its possibility to modulate the release according to the properties of its carboxyl groups as well as its biodegradability and absence of its toxicity. alginate is a naturally derived anionic polysaccharide mainly from algae belonging to the family of phaeophyceae. Alginic acid is an algal polysaccharide and a species of poly carboxylic acid. alginate consists of two sugar moieties ÃŽÂ ²-D mannuronic acid and ÃŽÂ ±-L guluronic acid which exist either in blocks or random sequences and their relative proportions determines the biofunctional properties of alginc acid. alginate is known to form complexes with divalent cations, such as Ca2+, Ba2+, and Sr2+ in aqueous solution. depending upon the composition of two sugar residues and sequential distribution within the molecules, the complexes form either precipitates or hydrogels. guluronic acid blocks are known to form a rigid buckled structure, the so called egg box array, in which chelating calcium ions are nestled in the aqueous environment of the ordered gel structure due to the spatial arrangements of guluronic block oxygen atoms of carboxyl and hydroxyl groups. Alginate has been widely used as food additive, a tablet disintegrator or gelation agent, and the mechanism of its gelation have been extensively investigated. when an aqueous solution of sodium alginate(SA) is added dropwise to an aqueous solution of calcium chloride, spherical alginate beads with regular shape and size are produced, since an insoluble calcium alginate matrix is formed by the cation exchange between sodium and calcium ions. alginates are known to form reticulated structure when in contact with calcium chloride ions and this characteristic has been used to produce SR particulate systems for a variety of drugs. GEL FORMATION (GENERAL MECHANISM) A gel in classical colloidal terminology, is defined as a system which owes its characteristic properties to a cross linked network of polymeric chains which form at the gel point. a considerable amount of research has been carried out in recent years to elucidate the nature of the crosslinks and determine the structure of alginate gels. alginate beads can be prepared by extruding a solution of sodium alginate containing the desired drug or protein, as droplets, into a divalent crosslinking solution such as Ca2+, Ba2+, and Sr2+ . monovalent cations do not induce gelation while Ba2+, and Sr2+ ions produce stronger alginate gels than Ca2+. other divalent cations such as Pb2+, Cu2+, Cd2+, CO2+, Ni2+, Zn2+, Mn2+ will also cross link alginate gels but their use is limited due to their toxicity. The gelation and cross linking of the polymers are mainly achieved by the exchange of divalent cations and stacking of these guluronic acids with the divalent cations, and the stacking of these gul uronic groups to form the characteristic egg-box structure shown in fig LARGE BEAD PREPARATION In general, beads greater than 1. 0mm in diameter which can be produced by using a syringe, with a needle or a pipette. sodium alginate solution that contains the solubilised drug or protein is transferred dropwise into a gently agitated divalent cross linking solution. The diameter of the beads formed is dependant on the size of the needle used and the viscosity of the alginate solution . a larger diameter needle and higher viscosity solutions will produce larger diameter beads. The viscosity of SA can also influence the shape of the microbeads produced. The beads become more spherical as the concentration of SA increased. however, in general SA solutions of greater than 5% are difficult to prepare. Since, gelation occurs in an aqueous environment, alginate is a promising material as a food additive, drug formulation and useful even for encapsulation of living cells to protect them from immune responses. utilizing this stable complex formation with divalent cations, alginate gels have been utilized for investigation of cells are considered to be the ultimate system for the pulsatile release of biologically active compounds. Formulation of delivery devices for protein and peptide drugs under aqueous conditions are desirable to avoid the undesirable decrease of bioactivities which may occur when using organic solvents or heat during formulations. since relatively stable alginate gels can be formed in aqueous environments through chelation or complexation, which are promising delivery of matrices for bioactive compounds. It has been suggested that the crosslinks were caused either by ionic bridging of 2 carboxyl groups on adjacent polymer chains via calcium ions or by chelation of single calcium ions by hydroxyl and carboxyl groups on each of a pair of polymer chains. although these bonds may play a role in the gelation mechanism which are not sufficiently energetically favourable to account for the gelation of alginate. it has been shown on thebasis of fibre diffraction data and model-building calculations that the shape of both poly-mannuronic acid segments and the polygulutended, and that these extended ribbons can stack together in sheets. on the basis of these data and the properties of gels it has been suggested that the cooperative association of either polymannuronic acid segments or polyguluronic acid segments are involved in the formation of the crosslinked network of polymer chain. This technique has shown attractive applications in different fields, including cell immobilisation, owing to its mild operating conditions. as the encapsulation method is mild, and done at room temperature in aqueous medium, several sensitive drugs, proteins, living cells, enzymes, spermatozoa etc have been successfully encapsulated through alginate beads. The primary structure of alginate depends on the producing species and for the marine species, seasonal and geographical changes might result in variations in alginates extracted from the same species. The polymer is nown to form a physical gel by hydrogen bonding at low pH(acid gel)and by ionic interactions with polyvalent cations such as calcium, the cation acting as a cross linker between the polymer chains. The viscosity and primary structure of polymer are important features determining it swelling and gelling properties. At neutral pH, sodium alginate is soluble and hydrates to form viscous solutions, but below pH3, alginic acid, water swellable but insoluble, which is rapidly formed. since the hydration characteristics of the polymer and the subsequent physical properties of the hydrated gel layer may critically influence drug release. When CA beads are treated with 0. 1M HCl, alginate gels hydrolysed to lower molecular weight fractions of alginic acid. due to conversion of COO- groups into unionised carboxylic groups, the electrostatic attraction between Ca2+ ions and COO- ions in the egg-box junction almost disappears. moreover, there may occur in ion-exchange between H+ ion(presence in the external HCl solution) and free Ca2+ ions inside the beads. thus a reduced Ca2+ ions concentration within the beads results in a weaker Ca2+ cross linked beads when put in phosphate buffer at pH 6. 8. Therefore, the acid-treated beads are loosely crosslinked structure more soluble alginate as constituent. when such beads are put in the phosphate buffer pH6. 8, the beads swell at a faster rate but do not attain a higher water uptake value due to loosely bound structure of the beads which is unable to retain large amount of water within the beads. moreover, there is possibility of ion-exchange between H+ ions produced due to ion isation of carboxylic groups in the buffer at pH. A group of scientists developed a method of enclosing viable cells, tissues, and other labile biological substances within a semipermeable membrane. preliminary in-vitro studies of several types of microencapsulated cells and tissues(redblood cells, sperm cells, hepatica cells, hepatocytes, pancreatic endocrine tissues, and islets) were described by them. essentially, the process involves suspending the living cells or tissues in sodium alginate solution. The cell or tissue suspension is extruded through a device producing micro-droplets which fall into a calcium chloride solution and form gelled microbeads with the cells or tissues entrapped. These cell containing gel microbeads are next treated with polysine which displaces the surface layer of calcium ions and forms a permanent polysalt shell or membrane. finally, the interior calcium alginate is liquefied, either to stay in or to cum out(depending on molecular weight and size of the starting alginate) of the capsule with a calciu m sequestrant such as buffered citrate solution. Gohel et al ., prepared diclofenac sodium microspeheres by using sodium alginate as a polymer and CaCl2 as a cross linking agent. in this investigation stirring speed, concentration of crosslinking agent and heavy liquid paraffin were studied, on the time required for 80% of drug dissolution. a statistical model with significant interaction terms was derived to predict t80 and drug was released by diffusion of anomalous type. The results of multiple regression analysis and F value statistics revealed that, obtaining of controlled drug release and microspheres were to be prepared using relatively lower stirring speed. Literature reports indicate wide spread use of sodium alginate for achieving sustained release of drugs, targeting gastric mucosa and increasing the bioavailability of drugs because of sodium alginates ability to form a stable and bioadhesive gel with calcium ions. Alginate also has several unique properties that have enabled it to be used as a matrix for the entrapment or delivery of a variety of proteins, macromolecules and cells. USES Of Alginate Beads A relatively inert aqueous environment within the matrix. A mild room temperature encapsulation process free of organic solvent A high gel porosity which allows for high diffusion rate of macromolecules The ability to control this porosity with simple coating procedures. Dissolution and biodegradation of the system under normal physiological conditions. Standard graph for propranolol hydrochloride A stock solution of propranolol hydrochloride was prepared by dissolving 100mg of the drug in 100ml of the phosphate buffer of pH6. 8 to give 1mg/ml solution. ten millilitres of stock solution was diluted to 100ml using phosphate buffer f pH6. 8 to produce 100ÂÂ µg/ml working stock solution. from this working solution, dilutions were made with phosphate buffer of pH6. 8 to produce 10, 20, 30, 40 and 50 ÂÂ µg/ml. The ÃŽÂ » max of the drug was determined by scanning the dilutions between 400 and 200nm using a Shimadzu 1400 UV visible spectrophotometer. At this wavelength, the absorbances of all the other solutions were measured against a blank. Standard curve between concentration and absorbance was plotted. COMPATIBILITY STUDIES One of the requirements for the selection of suitable polymers or carriers for pharmaceutical formulation is its compatibility. Therefore in the present work a compatibility study was done by using Infra Red spectroscopy (IR) and Differential Scanning Calorimetry (DSC) to find out if there is any possible chemical interaction between propranolol hydrochloride and the polymers. DIFFERENTIAL SCANNING CALORIMETRY (DSC) Differential Scanning calorimetric analysis was used to characterize the thermal behaviour of the drug substances. It was performed by using DSC-60(Shimadzu, Tokyo, Japan) calorimeter to study the thermal behaviour of selected formulations. The instrument comprised of calorimeter (DSC60), flow controller (FCL60), thermal analyzer (TA60) and operating software(TA 60). The samples were heated in hermetically sealed aluminium pans under nitrogen flow (30ml/min)at a scanning rate of 5Â °C/min from 24 + 1Â °C to 300Â °C. An empty aluminium pan, sealed in the same way as the sample was used as a reference. SCANNING ELECTRON MICROSCOPY Scanning electron microscopy is used to obtain the surface topographical characterization of beads. SEM photographs of prepared formulations were taken with (Instrument JSM-6390)at different magnification ranging from 30 to 5000x at room temperature. The samples were mounted on double sided adhesive tape that has previously been secured on copper stubs. The acceleratio

Civil Disobedience in Famous Literature Essay -- Plato Socrates Philos

Civil Disobedience in Famous Literature A society or a people cannot let a government lead them blindly. With misrepresentation comes a whole new form of unjustness. The strong are the ones who do not give into demands placed upon them if they do not agree; those who refuse to conform to society; those who stick to their beliefs, no matter the cost. In many cases, those people are the ones who practice civil disobedience. Martin Luther King, Henry Thoreau, Socrates†¦ All advocated that they should not be denied their freedom, and all were considered disobedient. The government rules itself not by appealing to man’s â€Å"sense, intellectual or moral, but only through his body, his senses. It is not armed with superior wit or honesty, but with superior physical strength.† (Thoreau) At a certain point, government does nothing but put fear upon its subjects, so that they would rather obey the law than risk the consequence of not. Such an example in seen in Sophocle’s renowned play, Antigone. In the story, Ismene portrays the role of a submissive sister, who’s obedience to law blinds he...

A Response to John Gatto’s Article Essay

In an article written by John Gatto, who is a very good teacher as proven by his numerous awards received, it seems that he is no longer an adherent of a curriculum of contemporary education. It seems that he is a bit late in knowing that he, as a teacher, is a slave of this kind of system. For more than two decades and a half, he never refuses to be part of it. Why a sudden change? As for my personal opinion, I am certainly agreed with the current type of contemporary education designed for kid’s learning at certain level but I hope that it would not be misunderstood with my position about the article of John Gatto because I am really opposed in his idea. I am not a believer of John Gatto’s description about the said scheme, because I guess, he made such exaggerated illustration of core curriculum according to his belief alone and is not proper to just be put in general situation. If, for any reason that John Gatto’s description is true, perhaps that only exists in his area of jurisdiction and is therefore an isolated case. To further explain my viewpoint, let me discuss and elaborate it. What is a teacher’s role anyway? Ever since formal schooling is born, which says by John Gatto that the blueprint of school procedure is from an Egyptian custom and that only brought in US trough Puritans, the teacher, or rabbi in their term, has the several roles. Firstly, a teacher is the one who educates students any lessons, in accordance to what they need to learn. Of course they know that a grade school kid does not need to learn at early age some subjects like accounting, trigonometry or geophysics because those types of subjects are much more complex things that young minds would not understand whether these kids are normal kids or gifted, and this will only be justified by a licensed teacher. Hence, it is but a right thing to call a teacher an educator. The second role of a teacher could be viewed as equal as parent’s role. Since kids spend most of the time of their growing years at school than at home, the teacher has all the responsibility in disciplining these kids especially when troubled with bad manners and behavior. Disciplining kids that are not biologically them would never be an easy task that only good teacher can do. Teachers mold these kids and prepare them to become a well-disciplined and well-behaved citizen of the country. To end this essay, I want to emphasize my position of disagreeing with John Gatto’s viewpoint and to once again make an appeal to the public, to every public school teacher, and especially to John Gatto himself to understand the disadvantages and advantages of teaching within the standardization scheme set by the norm and traditional custom, to realize that teaching is not just a work for a living. Teaching is, and will always be, a noble profession! R E F E R E N C E Gatto, J. T. (1991, July 25). I May Be A Teacher But I am Not An Educator. The Wall Street Journal.

A Bridge to Wiseman’s cove Essay

The novel A Bridge to Wisemans Cove is about a teenage boy named Carl who is mum left him and his brother to go live with their aunt, who is cruel, selfish and gambles. This book describes how Carl and his younger brother find happiness in the most odd places. In this novel, the author raised some issues like underage drinking, body image, child abuse, gambling, young school leavers and dysfunctional families. Carls family was tearing apart from the start, from his mum occasionally leaving them to defend for themselves as beryl explains later on that mother of yours is always taking off. to finding out that all the three children have different fathers. And Sarah their sister also leaves realizing that they could only make her life worse. The effects of Carls dysfunctional family are vast leaving kids feeling left out and alone, trapped in something that they dont like. Child abuse was a relatively big thing in this book centring the affects that aunt Beryl has on both Harley and Carl, but mostly Harley. She did not want Harley to leave the house. At one end it was looped in the window frame. At the other, met a pair of handcuffs. This is how she kept Harley at home by chaining him up. To where their mum abandons them because she cannot handle looking after them. Child abuse in this book is quite relevant for the teenage audience of this book. Gambling is a significant issue in this book, showing from how it can be addictive to how it almost possesses a person. Aunt Beryl had a gambling problem she had a win at the poker machines. and played almost everyday, and how beryl steels from Carl to get the money to gamble with, leaving Carl with no money for himself or Harley. Gambling is an awful habit that in many cases is hard to escape from and has a big impact on not just one person but friends and family. Body image was also brought up throughout the book. Describing how someone who is unhappy with themselves like Carl and Justine, Carls friend, can still have a good self image and feel good about themselves instead of hiding it. It also reflects on how Carl and Justine have something close,  something to relate to with each other. stomach bulging through the lines of his buttons describes how Carl sees himself in the mirror. Body image is a major topic in any teenagers life and it is great to see that James moloney has relised that and brought it out as a message in his book. Underage drinking is another topic in this novel describing how teenagers are not responsible with alcohol, but try to imagine that they are. Like Maddie (Justines friend) who became drunk on New Years by sculling a mix of rum and coke. It was Just rum and coke, like everyone else, but it didnt have the same effect to everyone else. Underage drinking is a problem that occurs in many teenagers lives and in some cases ruins their lives. Leaving school early is what Carl had to do when he moved to Wisemans Cove after aunt beryls greedy mind took possession of Carls life and made him go get a job instead on going to school, because aunt beryl wanted the money to go gamble with. Harley on the other hand was able to go to school only so he was out of aunt beryls face for the day. Carl was forced to get a job on the barge with aunt beryl squeezing every dollar out of him. With Carl being fifteen years old it was hard for him to get a job but after helping joy (Maddies mum) he was able to help on the barge. I didnt want to take you on.. Skip Duncan complained to Carl about not wanting to work with him. School is one of the essentials for a teenager and you cant just force one to loose the lack of education so easy. A Bridge to Wisemans Cove certainly raises the awareness of alcohol, child abuse, body image and how you feel about yourself, gambling, how families sometimes break up and how leaving school early can ruin some peoples life. I think that this book is great, making people relies that there are problems occurring out there that are usually hidden and un heard or until it is to late. Bibliography – www.bookrags.com/ A Bridge to Wiseman’s Cove Essay ‘With it’s sight restored at last, the bird jerked it’s head sideways to look at Carl and then Joy, as though it was asking, is it true? Am I free?’ James Moloney uses the image of the osprey in several ways throughout the novel. The main technique in which it is represented, is the emotion of the characters finally feeling free in there own way. The first use of the image of the osprey is shown when Carl’s mother Kerry would always leave to go on one of her ‘holiday’s’. I believe that she went on these holidays to make herself feel free. To go away for a few days and leave her real life. But in fact she was never really free. Even on her holidays she always knew that she would eventually have to come back to reality, to her children. It’s not that she didn’t love her kids, she did. Perhaps she just couldn’t handle the stress of having to raise three children as a single parent or maybe just having them around was holding her back. During the prelude of the novel an unknown women gets on board a bus. She waits out of sight and sneaks on the bus when the driver is pre-occupied. She does not have a ticket and no one knows who she is. ‘The driver gunned the engine, commanding its throaty roar and the bus pulled away from the roadhouse into the sea of darkness. Only then did the women sit up and permit herself a smile’ At the end of the novel we find out that this women was Kerry. She was on her way back to her children when the bus she was on drowned into the ocean. In the moment that Kerry died, came the realization that she knew she was finally free. Sarah, Carl’s sister also finds the courage to leave and set herself free. Free from living her own life. Since Sarah was old enough to remember she would always have to depend on herself not her mother. When her mother would leave she would have to look after Carl and Harley as though they were her own. She states in the book ‘I’m only nineteen years old. I’ve got my own life. By the time Harley’s old enough to take care of himself, I’ll be thirty.’ Although I don’t agree with the way Sarah went about just dropping Harley and Carl off at their Aunt Beryl’s, I agree that she has her own life to live and she needed to escape. Consequently, setting herself free. The image of the osprey is shown in a major way within Carl. In many ways the osprey is a mirror image of Carl, in its appearance, pain, suffering, recovery and how it is set free. The image of the osprey is remarkably similar to that of Carl’s. It was a, ‘large bird, brown and grey, its head covered by a canvas hood.’ The description of the osprey matches some aspects of Carl’s body and personality. Carl was a large boy, miserable like the colour grey and he was shy like a hood covering his head. This was because he did not want to see what people responded to his body. He was ashamed of himself and the name his family had. Although by the end of the book Carl realizes that he finally has new friends and a new family. He finds that people like him and that they ignore that he is a Matt. ‘My name is Carl Matt. M-A-T-T.’ Carl screams his name out to the world, he doesn’t care anymore. Carl was free. Free of his worries, free of his fears. He is free from the curse that everyone says he and his family has. He could let go of his sorrowful past and be alive just like how the osprey let go of its painful past and began to fly once again. The way the osprey spread it’s wings and took its first beat against the wind symbolizes the emotions rushing through Carl when he finds out his mum truly did love him and Harley. The journey of the osprey mirrored Carl’s personal life. The osprey was set free in a way that makes Carl feel alive. The image of the osprey is used to represent the characters feeling free. It mainly symbolizes as a metaphor for Carl’s life. The osprey is free from being injured by people by being nurtured from Justine and Joy. Carl was also getting injured by people. Throughout his whole life people were hurting him. Kerry, his mother, Beryl, his aunt, his older sister Sarah and kids calling him names about him weight. When he met Justine and Joy, they saved him. They made him feel alive. They set him free. A Bridge to Wiseman’s Cove Essay A bridge to wiseman’s cove, by James Moloney is a novel about a young man named Carl Matt; it goes through all the difficulties he faces during his life on wattle beach. At the beginning of this novel, the importance of family seems to be the main theme, however, as the story continues, other themes are introduced such as knowing the difference between wrong and right, how one views himself, in other words body image, abandonment, the need for love, neglect, loneliness and many more. Right from the beginning of the story the reader is introduced to some of the fundamental characters of the novel such as Kerry, the mother of Carl, his younger brother Harley and his older sister Sarah. From as early as the first few chapters the theme of abandonment is introduced when Kerry decides to abandon Carl and his two other siblings. But this isn’t the last time you read about abandonment it seems to be a reoccurring event. It is soon discovered that Kerry was also abandoned by her three previous boyfriends that she had a child each with! Sarah then tells Carl and Harley that they will be spending their holidays with their Aunt Beryl in Wattle beach while she goes on a holiday of her own. Its not long till they realise that Sarah won’t be coming back from her holiday any time soon, meaning Carl has been abandoned once again. Once you think no one else could leave Carl, Harley leaves him too live with the Duncan’s family, while living with beryl for him becomes unbearable. Being abandoned so many times, Carl is left feeling hurt, confused and neglected! This is where the themes loneliness and the need for love come in. When Carl first arrives, he is miserable and lonely: â€Å"alone in the park, Carl wishes he was a concrete statute, set there for the birds to sit on. No thoughts, no cares, no pain, just years of weathering in the sun and rain until there was nothing more† (pg. 29) He is later told by Justine that he has been â€Å"playing dead† (p. 184). Carl finally admits that he is hurt inside by what he is mother has done, and he doesn’t even know if he is loved or not. He explains to Justine that â€Å"there’s something broken inside of me. Every time I try open up it hurts and I have to stop† (p. 278). â€Å"I’m angry.  All the time it was that one fear. That she didn’t love me.† (p. 232) Carl is big, awkward, and well aware of his body. The Oxford dictionary defines â€Å"body image† as the subjective picture or mental image of one’s own body. For Carl body image is important, other then being low is self esteem, he is so self-conscience of what other people might say or think about him he wore a t-shirt when he went swimming to protect himself from public humiliation, â€Å"he was ashamed of his fleshly bulges in front of the war-painted life savers† (p. 44). As a defence mechanism Carl would often draw his arms to his stomach in order to hide it when he felt uncomfortable (p. 45) and this shows that his body image is always in his thoughts.

Environment and Renewable Energy

Environment and Renewable Energy Introduction A greater focus on renewable energy development is necessary in this day and age due to the various problems brought about by the use of fossil fueled power plants, which have caused not only an increase in the amount of pollution in the air, but have also brought adverse climate change as well as an increase in the amount of people with respiratory illnesses (Mandal, Habib, Zhang, Mukherjee Tornatore 2013).Advertising We will write a custom essay sample on Environment and Renewable Energy specifically for you for only $16.05 $11/page Learn More Based on this, the paper will delve into the effects of fossil fuels, the necessity of renewable energy resources in mitigating such a problem and the current attitudes and support towards â€Å"green energy† production. Weather The problem with using fossil fuel burning power plants as the primary method of energy production within a country is the impact it has on the weather. It must be noted that an increase in the amount of carbon dioxide in the atmosphere actually causes heat to be trapped within the Earth’s atmosphere, which has lead to stronger storms and droughts around the world. This has the potential to cause various problems, which can be seen in the case of South East Asia and the U.S. which have experienced an increase in the amount and strength of storms in their areas (Shi, Du, Yang, Tang, Fan, Zhang, Lu, Ge Chang 2013). Figure. 1 Carbon Emissions DataAdvertising Looking for essay on environmental studies? Let's see if we can help you! Get your first paper with 15% OFF Learn More Waste Management In figure 2, an examination of the current amount of carbon emissions into the atmosphere by 2010 reveals that 25,000 metric tons of carbon emission gas were released by various sources into the atmosphere by the city of Beijing alone. This number is a combination of both emissions from motor vehicles as well as those coming from fo ssil fuel burning power plants (Qi, Zhang Karplus 2014). Climate Change Studies such as those by Simsek Simsek have stated that not only have these emissions contributed significantly to the rise in respiratory diseases, but they also brought the current trend in global climate change as evidenced by the increase in temperatures around the world (Simsek Simsek 2013). This has lead to an adverse situations in many countries resulting in either droughts, floods or other forms of adverse climate change. Necessity of Renewable Energy Resources Renewable energy technologies are methods of energy production that utilize naturally replenishable resources such as solar, wind, geothermal heat and tides energy. Unlike fossil fuel based methods of energy production, renewable energy technologies are nonpolluting and are a source of potentially limitless energy since they are not dependent on a finite source of power (Wright,Dey Brammer 2013). As such, by focusing on renewable energy develo pment, this should help to resolve the various issues related to climate change and the increase in the number of individuals with respiratory diseases.Advertising We will write a custom essay sample on Environment and Renewable Energy specifically for you for only $16.05 $11/page Learn More Current Attitudes and Support towards Renewable Energy The Green Movement can be summed up as a political ideology, which main goal is the creation of an ecologically sustainable society where conservation and sustainability are everyday practices rather than isolated rarities in an increasingly consumerist global population (Liu, Lieu Zhang 2014). The main concept that drives the Green Movement is the idea that the finite resources available on Earth cannot support the potentially infinite expansion of humanity. It is a belief that states that the Earth itself is a closed off ecosystem with no resources entering into it. As such, its surface can only support a certain population of species before the ecosystem inevitably collapses in on itself as a result of a severe strain on the planets natural and ecological resources (Culley, Carton, Weaver, Ogley-Oliver Street 2011). Conclusion Overall, what this paper has shown is that a greater focus on renewable energy development must be implemented due to the adverse effects that the present method of energy production has on people and the environment. Reference List Culley, M, Carton, A, Weaver, S, Ogley-Oliver, E, Street, J 2011, Sun, Wind, Rock and Metal: Attitudes toward Renewable and Non-renewable Energy Sources in the Context of Climate Change and Current Energy Debates, Current Psychology, vol. 30, no. 3, pp. 215-233 Liu, Z, Lieu, J, Zhang, X 2014, The target decomposition model for renewable energy based on technological progress and environmental value, Energy Policy, vol. 68, pp. 70-79 Mandal, U, Habib, M, Zhang, S, Mukherjee, B, Tornatore, M 2013, Greening the cloud using renewable-ener gy-aware service migration, IEEE Network, vol. 27, no. 6, pp. 36-43Advertising Looking for essay on environmental studies? Let's see if we can help you! Get your first paper with 15% OFF Learn More Qi, T, Zhang, X, Karplus, V 2014, The energy and CO2 emissions impact of renewable energy development in China, Energy Policy, vol. 68, pp. 60-69 Shi, Y, Du, Y, Yang, G, Tang, Y, Fan, L, Zhang, J, Lu, Y, Ge, Y, Chang, J 2013, The use of green waste from tourist attractions for renewable energy production: The potential and policy implications, Energy Policy, vol. 62, pp. 410-418 Simsek, H, Simsek, N 2013, Recent incentives for renewable energy in Turkey, Energy Policy, vol. 63, pp. 521-530 Wright, D, Dey, P, Brammer, J 2013, A fuzzy levelised energy cost method for renewable energy technology assessment, Energy Policy, vol. 62, pp. 315-323

Country size Essay Example | Topics and Well Written Essays - 250 words

Country size - Essay Example South Korea is found in East Asia in the south of Korean peninsula. South Korea covers an area of 38, 023 square miles (98,500 kilometers), with 148 miles coast line. South Korea has an estimated population of 51,170,969 people. South Korea is bordered by North Korea virtually in all directions to the north, Sea of Japan and the Yellow Sea, and to the east. North Korea is the state that is close to South Korea (Simon, 2014). The United States is made up of 52 states, it has an estimated population of 297,976,000 people that is expected to grow thought at a slow pace. To the north, the United States is boarded by Canada while to the south he boarders Mexico. Found in the Middle East, Saudi Arabia lies between the red sea and the Persian coast. Saudi Arabia borders Kuwait, Iraq and Jordan to the north, United Arab Emirates and Qatar to the east, Oman and Yemen to the south. Saudi Arabia covers an approximate of 756,981 square miles. Saudi Arabia has an estimated population of 22,023,5 06. Nauru is the third smallest state, it is located in the west of Pacific Ocean, she has a population of close to 13,500 people and covers an estimate are of 21 kilometers square miles and borders Australia to the east. Tuvalu covers an area of 26 kilometers square; she has a population of 10, 441 people, and it found in the south of Pacific. San Mario covers approximately 6i kilometers square, and has a population of 28,117 people; she is located near the Adriatic coast (Simon, 2014).

Social Science & Social Changes Essay Example | Topics and Well Written Essays - 1250 words

Social Science & Social Changes - Essay Example Slowly and gradually, these cities came closer forming different nations of the world. In this way, along with the growing population, the societies grew into civilizations and prospered over hundreds of years. The social orders that initially comprised a bunch of people, with the passage of time became large communities and large nations. Now, the whole world is coming closer day by day and is becoming one big global village. The current global trend supports globalization that emphasizes on living like a one big global community. With all these changes in societies, along the course of time, there came many opportunities, new possibilities and broader horizons, but with that equally came many risks, threats, uncertainties and crises. Cultures changed and so did people. With the new developments there came better education, better health, better life style, better communication and transportation, better techniques, procedures and processes, in fact, a whole new way of life; and with passing time, this process of evolution of the societies is becoming faster and faster that the way the social changes have bombarded us in last five decades, it had never done before. If we look at the life of the human being not very different from us who lives fifty years ago, we find such huge differences that it becomes very difficult to compare. Science and technology has prospered so much that the diseases that were thought of as completely incurable can now be treated using advanced techniques and processes. Treatment of life threatening diseases like cancer or life endangering situations like failure of a vital organ of the body is now possible and thus more and more precious lives can be saved. The new researches promise better education and better learning in a vast variety of areas. Researches are being conducted in practically every field of life. Science and technology has made life so easy that many tasks can easily be accomplished by just a flick of your finger over a button so the work that used to take weeks can now be done in days. So many things that man could only dream of as something miraculous are now a part of our every day lives. Life has become automatic; automatic cars, automatic machines, automatic gizmos and gadgets, even automatic homes. All one has to