Role of Management Accounting Essay Example | Topics and Well Written Essays - 250 words

Role of Management Accounting - Essay Example Apart from collecting, recording and reporting the financial matters, the main role that the managerial accounting plays is of the budget. The budgets are a major aspect of an organization. It is the vital organ in the industry that controls the overheads and makes certain the preparation of an organization for the upcoming period and challenge. Budgets function as analysts that outline the prospect as to how the company is going to dwell in the upcoming phase. Without a strategic planning, an organization cannot carry on. The budget helps the company to ensure that the spending limits are adequate. Speaking about the managerial and financial accounting, the basic difference between them is that the managerial accounting interprets the people working in a specific organization. It analyzes the work that is going on and also plans for the work that would take place, aiming for a better future of the company as they do so. Whereas, the financial management relates to the effective use of money that can be utilized and maximize the value of the firm as well. They are the base on which the profit making of the whole company depends. They are the protectors of the company’s assets and strengthen the accountability, exhibiting on how the financial supplies are utilized. Thus, managerial accounting plays a fundamental role in the success of an organization. It requires awareness and skills to outline the challenges that are faced by the company. Overcoming them and organizing them helps a business to prosper and interact with other business organizations more fluently and more

The American Revolution as a European Movement Essay Example for Free

The American Revolution as a European Movement Essay The American Revolution was and always will be the most important piece of history for the United States of America. It was definitely revolutionary. The Enlightenment of the eighteenth century was one of these paradigm historical shifts, challenging the traditional notions of authority by investing reason with the power to change the human condition for the better. The Enlightenment also shows that the American’s colonies were influenced by European ideals and political developments, and in turn the American’s colonies also influence Europe. Across the Atlantic, the Enlightenment had a profound impact on the English colonies in America and ultimately on the infant nation of the United States. â€Å"The Enlightenment challenged the role of religion and divine right and this helped Colonial America to see that it was possible to challenge the King and divine right. The movement challenged the role of God and allowed people to see that they were important and had the ability to shape their own lives. (â€Å"The Great Awakening†¦Ã¢â‚¬ , Journal) In many ways, the new United States was the Enlightenment, for its leaders could actually implement many of the ideas that European philosophers could only talk idly about. First, the Enlightenment helped to shape the colonies was in terms of religion. With the Great Awakening came a new understanding of America’s early relationship to God and the Church. Instead of one all-powerful church that almost required membership, Protestant ideals based on Enlightenment principles of free will and freedom from institutions allowed people to choose membership in a church rather than be forced into one. Although during the Enlightenment there was a very secular focus, in America this was not the case. The colonies were still very religious but they used the ideas of their freedom to choose that were based on the Enlightenment. Instead of being tied to one religious authority, there were many choices in the colonies and people had a right to choose how to establish and maintain their connection to God. Much of what colonists wanted to do with politics had a greater influence coming from Britain. Philosophers like Thomas Hobbes and John Locke both had great influence on American thinkers, with Locke being the more influential as Hobbes solution was not the thing the American founders wanted. Locke was far more optimistic, stating that all humans were capable and that they strove for the betterment of the world. John Locke believed that natural laws say that every person has certain basic rights, and he argued passionately for freedom of religion. He wrote that every person has the natural right to defend his â€Å"life, health, liberty or possessions. John Locke argued that because we have so much doubt about so many things, each person should have as much freedom as possible. Because we really don’t know the best way to organize and improve our society, all people should make their own decisions about what they want to do with their own lives. When Jefferson wrote the Declaration of Independence, he echoed Locke, writing about â€Å"life, liberty, and the pursuit of happiness have become the central themes of American Revolutionary philosophy. † (Morton, Joseph C, 143) The American Revolution had much influence beyond the political boundary of the new nation. Many liberal movements in Europe took heart from the accomplishment of the American Declaration of Independence, the war itself, and the creation of a new government to replace the British rule over the old colonies. Many peoples wished to either overthrow the idea of monarchy or, at least, establish a constitutional monarchy. The French Revolution was inspired by many of the ideals of the American Revolution When the French people heard of the revolt in America they realized they didnt have to live under tyranny. They started the revolution in hopes of becoming an independent country. The French fought alongside the Americans against the English to accomplish a democratic, independent nation and the declaration of independence France was bankrupt at the time, so the people were very poor. Meanwhile they saw their monarchs in all their wealth and began to see them as tyrants. The stories of the French soldiers that had fought in America, like the Marquis de Lafayette, loved the American notion of liberty and began to support similar reforms in France. As James mentioned â€Å"Lafayette was one of the first people to advocate a National Assembly, and he worked to make France a constitutional monarchy. †(James) Revolutionary ideas turned into real plans of attack. They wanted to rid themselves of a monarchy ruled by the royals, clergy and aristocrats. In conclusion, Enlightenment thinking, economics, and geography all helped in some way toward an American revolution. Also, Enlightenment thinking helps the American colonists to know what they want in a government.

Microbial Mats: A Bioreactor of Lithification

Microbial Mats: A Bioreactor of Lithification Microbial mats: a bioreactor of lithification and an indicator of Earths evolution Introduction Microbial mat is a general term that is used to describe a variety of microbial communities that are found at interfaces between different types of material, mostly on submerged or moist surfaces such as estuarine environment and salt marshes (Krumbein et al., 1977; Nicholson et al., 1987). Bacteria and archaea are two main microbes forming the layers. Microbial mats contain a variety of different but essential trophic groups including primary producers, consumers, and decomposers. This is why even though microbial mats are, to an extreme extent, geographically small, they are ecosystems from an ecological perspective. Microbial mats are dynamic ecosystems in which a wide range of metabolic processes take place. Inside this tiny ecosystem, different physical and chemical environments are distinguished by a variety of gradients, include but not limited to light, oxygen and sulfide (Visscher and van den Ende, 1994). The gradients may not be always constant. For example, oxygen concentration may have varied from diurnally to seasonally. In some aquatic systems, it will drop from supersaturated to undetectable within a few centimeters. The light penetration depth is fluctuated because of change of seasons or just with cloud covering. All these temporal environmental oscillations mentioned above, will result in coupled reactions, that are critical to the biogeochemical cycle, like reduction and oxidation of elements such as carbon and sulfur. Therefore, heterogeneity of microbe habitat is a common character that exhibits among all microbial mats.   Microbial mat ecosystems can be viewed as a semiclosed system which require little more than sunlight to function, as such it is efficient in all kinds of reactions and element cycling. The relatively simple but functional structures make it, to a certain extent, easy to reach equilibrium and mass balances. Generally, microbial mats tend to have high rates of oxygenic photosynthesis, aerobic respiration, sulfate reduction, and sulfide oxidation (Canfield and Des Marais, 1993; Revsbech et al., 1986), when compared to other benthic ecosystems. A classical view of a microbial mat (Figure 1)(Visscher et al., 2000) is that a fixed sequence of microbial groups exists: starting with oxygenic cyanobacteria as a surface community, underlain by oxygenic phototropic bacteria and sulfate-reducing bacteria as subsequent layer (Krumbein, 1983). This view, however, was later questioned and revised. Structure and the layers are not a result of different metabolic reaction types, on the contrary, they might be found in association with the cyanobacterial layer. Some research showed that the sulfur reducing bacteria was also found in the surface layer (Frà ¼nd and Cohen, 1992; Visscher et al., 1992). Microbial mats and mineral interaction In microbial ecosystems, when the precipitation rate of minerals is faster than that of dissolution, lithification will occur. Precipitations mediated by microbial mats is not limited to carbonates but also constituted by other minerals, such as gypsum and anhydrite (Ehrlich, 1998). Among all these precipitation types, carbonate precipitation is perhaps the most important process as it is directly related to the global carbon cycling. Therefore, in this section, a main focus will be put on sedimentary biofilms in hypersaline environments to help with the interpretation of the rock record. 2.1 Stromatolites and carbonate precipitation Stromatolites are lithifying organic sedimentary structures formed by microorganisms (Figure 2). Carbonate precipitation activities of microbial mats are trapped and recorded in stromatolites layered structures. As such, microbial mats can be viewed as bioreactors (Dupraz et al., 2004a). The stromatolites structure is characterized as an alternating soft and hard layers whose heights ranges from a few centimeters to two meters. The evolutionary processes of stromatolites remain largely uncharacterized (Zavarzin, 2002). There are two major hypotheses. Des Marais (1997) speculated that microbial lithification is a result of by-product of microbial metabolism. On the other hand, McConnaughey and Whelen (1997) suggested that this could be directly related to the consequence of microbes harvesting energy from protons released during calcium carbonate precipitation. However, regardless of origin, stromatolites have thrived for a long history that could be seen as a major evolutionary advan ce for us to study the Earths early history and global biogeochemical cycles. Cyanobacteria have played a crucial role in carbonate precipitation as shown in Figure 3. Two microbially as well as physicochemically controlled factors determine carbonate precipitation: the saturation index (SI) and exopolymeric substances (Lozano-Garcà ­a et al.). SI = log(IAP/Ksp), where IAP denotes the ion activity product (i.e. [Ca2+]*[CO2-]) and Ksp, the solubility product of the corresponding mineral (10-6.37 for calcite at 25 °C, 1bar atmospheric pressure and 35 PSU salinity (Zeebe and Wolf-Gladrow, 2001)). If IAP > Ksp, the solution is supersaturated, and when SI > 0.8, calcite carbonate tends to precipitates (Kempe and Kazmierczak, 1994). Or else, calcite carbonate will dissolve. The [CO32-] depends on the carbonate equilibrium, which comprises three species as followed: H2CO3, HCO3 and CO32-. In another word, pH is influencing the precipitation. Therefore, before investigating how microbial metabolism affect the CaCO3 precipitation, understanding production and consum ption of inorganic carbon and the environmental pH change is a prerequisite. EPS act as a chelator for cations and the template for crystal nucleation (Costerton et al., 1995; Decho, 2000). It is constantly modified by including but not limited to UV radiation, pH and microbial degradation (e.g. through hydrolysis, decarboxylation). 2.2 Microbial mats and lithification Contemporary microbial mats, vertically laminated ecosystems, resemble the layered sedimentary structures of stromatolites. As such, they have been attracting extensively research interests for being analogues for stromatolites. Shown in Figure 3, there are 6 different functional groups of microbes exist in microbial mats. From top of the figure to the bottom are: Cyanobacteria act as primary producers, which are believed to affect the trapping and biding of sediments; Aerobic heterotrophic bacteria, which gain energy from oxygen respiration and organic carbon; Anoxygenic phototrophs, mainly purple and green bacteria, which using HS- for photosynthesis; Sulfate reducing bacteria (SRB), which respiring organic carbon with SO2- while producing HS; Sulfide oxidizing bacteria (SOB), chemolithoautotrophs that oxidize HS with oxygen or nitrate while fixing CO2; fermenters, using organic carbon or sulfur compounds as electron donor and acceptor. However, this view of the mat composition is facing challenge because nucleic acid sequences will undoubtedly reveal more diverse and complex community structures than the simple classified ones. Cyanobacteria is more like an important mediator of biogeochemical cycle of the mats ecosystem. It produces oxygen for the whole system to be functional (Fenchel, 1998). As mentioned before, the mat ecosystem is very efficient and productive. The relatively high photosynthetic rates, which shows a diurnal fluctuation, will reach its peak in the afternoon. Aerobic heterotrophs respire during the daytime when there is abundant oxygen, thereby creating an anoxia environment at twilight. Fermenters degrade complex organic molecules into smaller ones and benefit the SRB. SOB and anoxyphototrophs have contributed less to carbon fixation comparing with cyanobacteria and the role of fermentation remains ambiguous. All these activities above have resulted in steep vertical geochemical gradients with extreme diel fluctuations (Figure 3). To understand the role of microbial mats in precipitation and dissolution, it is important to determine both the abundance and metabolic activity of these key functional groups. Because the quality and quantity of EPS are largely determined by the metabolic activity of the community. In the previous researches, several microbial mat systems have been found to produce carbonate phases: travertine in hot springs in Yellowstone (Fouke et al., 2000), dolomite in Lagoa Vermelha, Brazil (Vasconcelos and McKenzie, 1997) and Salt Pan, Bahamas (Dupraz et al., 2004a). However, there are still mats that will no lithify or fossilize. So here comes the question, what determines the lithification potential? A previous study, using a combination of geological and microbial techniques, of lithifying microbial mat systems in hypersaline lake system was carried on in Salt Pan in Eleuthera, Bahamas (Dupraz et al., 2004a). The lake is not deep with an average depth less than 60cm. From the shoreline towards the center of the lake, a gradient from lithifying mats to jellylike soft mats exists (Figure 4). The shallow water column was found to contain cyanobacterial pigments that efficiently quench the sunlight. Not surprisingly, the photosynthesis, aerobic respiration, sulfate reduction are generally higher and geochemical gradients are steeper in the shallower lithifying mats. Moreover, EPS is easily destructed by strong UV radiation in shallower mats. This process helps with removing inhibition of precipitation by releasing more Ca2+ into the environment. The combination of these processes benefits carbonate precipitation. 2.3 Microstructure of precipitation and EPS UV radiation will cause browning reactions, dehydration and alkalinity. However, EPS production in stromatolite mat can prevent damages such as desiccation of the mat, retains essential nutrients, and provides water channels for transporting metabolites and signaling compounds (Costerton et al., 1995; Decho, 2000). Decho, A.W. et al. (Decho et al., 2005) had shown that EPS production in a stromatolite mat accounted only for 8% of 14HCO3uptake during the light, and a rapid turnover followed during the dark. They concluded that despite the fast rate of production, the net EPS production was low. The production and consumption are in equilibrium. Once being hydrolyzed, EPS components were readily consumed by the mat community, particularly anaerobes instead of aerobes. This is somehow surprising that when Schizothrix EPS, xanthan, or sugar and amino acid monomers and polymers that comprise EPS were supplied in mats, stimulation of anaerobic heterotrophic activity stimulation was greater than aerobic heterotrophs activity (Decho et al., 2005; Visscher et al., 2000). The combined action of fermentative organisms and SRB could be responsible for this high consumption rate. Oxygen levels are influenced by the rapid and extensive diurnal fluctuations as well as cloud cover and O2-consuming cell clusters in the EPS can produce anoxic microenvironments, therefore, the anaerobic pathway plays an important role in microbial EPS degradation. EPS can not only release Ca2+and HCO3 during microbial alteration, but also influence chemical gradients, which will in turn affect the mineral phases. The EPS matrix preferably slows down the mobility of hydrated Mg2+, therefore, temporarily increase relative abundance of Ca2+(Figure 5). The delay of Mg diffusion would lead to a decrease of the Mg2+:Ca2+ ratio of mineral products forming inside the EPS (Verrecchia et al., 1995). As mentioned above, changes in the amount or type of EPS could influence the rate of precipitation or types of crystals formed. 2.4 Microbial metabolism and saturation index Simple redox reactions form the basis of microbial metabolism. These metabolic reactions often involve C and either O, S or N (Figure 3;(Fenchel, 1998)). Daytime and nighttime metabolism of the six key functional groups is typically different, especially when it is influenced by oxygen and sunlight. Chemical alterations of the microenvironment that result from different metabolic reactions might change the alkalinity and thus facilitate carbonate precipitation or dissolution (Visscher and Stolz, 2005). Microbial mats have a high metabolic activities, thus it is not surprising that the rapid SI changes, despite the internal buffering capacity of the carbonate system, would result in a chemical alteration of the microenvironment. High rates of cyanobacterial photosynthesis cause a rapid depletion of CO2, which challenge the resilience or reestablishment of the carbonate equilibrium, and the increasing alkalinity will results in carbonateprecipitation through removal of the Hthat is pro duced in the latter reaction. It should be noted that in these reactions, organic carbon is assumed to be CH2O and different outcomes are expected with different organic compounds. For example, CO2produced bythe decomposition of carboxylic acids, will potentially increase the carbonate alkalinity by CO2degassing(Visscher et al., 1992). As such, this could probably explain why heterotrophic aerobes have been shown to precipitate carbonate. Microbial mats as an indicator of sulfur evolution The sulfur cycle has evolved over the long history of the Earth, with the concentration and the isotopic fractional abundance much different between Precambrian and contemporaneous environment (Cameron, 1982). The surface environment of the early Earth was basically reducing. Little atmospheric oxygen existed. Even though it is still under debate how the oxygen was produced at first, a majority of researchers believe that the history of atmospheric oxygen and seawater sulphate are closely linked (Habicht and Canfield, 1996; Ohmoto et al., 1993; Walker and Brimblecombe, 1985). Sulphate in Archaean and early Proterozoic sediment was found to be consistent in 34S depletion, which is similar to meteorites and mantle-derived igneous rocks (Cameron, 1982; Monster et al., 1979). Moreover, sulphate level was found to positively influence the rate of 34S depletion as lower levels sulphate (

philosophy :: essays research papers

Chapter’s 3 & 4 Synopsis Chapters 3 & 4 Synopsis I believe the assumption of an external reality is the assumption that there is a real world that is external to our mind and senses, and that it exists whether or not we as observers exist, and whether or not we are observing it. This assumption cannot be proved because all of our perceptions, without exception, are mental images, and we have no means to go beyond our mental images. It is one we all commonly make without even thinking about it. In the military, we assume the office and the computer in it are there after we leave work at the end of the day and will be there when we arrive at work in the morning. When we head home at the end of the day, we assume that our house or apartment will be there when we arrive, and that it continued to be there in our absence after we left in the morning. We assume that our friends, relatives, and acquaintances are there whether we can see and talk to them or not, and whether or not we are thinking about them. We assume that our parents exist ed before we were born, and that many of the people we know will be alive after we die. So many of our everyday experiences repeatedly confirm this assumption that most of us hardly question it. It is an assumption that has enormous survival value: we know that a speeding car can kill us while we are crossing the street absorbed in our thoughts and unaware, that a stray bullet can instantly obliterate our consciousness without warning, or that we can die from an external agent such as a virus, a bacterium, or a poison. The assumption of external reality is necessary for science to function and to flourish. For the most part, science is the discovering and explaining of the external world. Without this assumption, there would be only the thoughts and images of our own mind (which would be the only existing mind) and there would be no need of science, or anything else. In addition to the assumption of an external reality, we also make the assumption that this reality is objective. Thi s is repeatedly confirmed by our daily experience as well as by scientific observations. I also learned that objectivity means that observations, experiments, or measurements by one person can be made by another person, who will obtain the same or similar results.

Soft Tissue Injuries Therapy Effects Health And Social Care Essay

The correlativities between tissues and high frequence sound moving ridges have been studied and suggested as a therapy for over seven decennaries now ( Wood et al. , 1927 ) . Ultrasound has become a really widely used method to handle a assortment of medical conditions from lesions to tumors ( Young & A ; Dyson. , 1990 ) and is used normally for handling soft tissue hurts. The usage of ultrasound for handling soft tissue hurts is over a million at National Health Services ( NHS ) in UK ( Haar et al. , 1985 ) . Ultrasound therapy has become the most widely used intervention for soft tissue hurts ( Speed, 2001 ) . Ultrasound is mechanical quiver of high frequence unhearable sound which gets converted into acoustic energy by mechanical distortion of piezoelectric crystal nowadays in the caput ( Haar, 1987 ) . Curative ultrasound has a frequence scope from 0.75 to 3 MHz. and ultrasound moving ridges of low frequence have higher incursion but are less in focal point, hence ultrasound of frequence 1MHz is recommended for patients who have more fat and besides for deeper hurts and 3MHz for superficial lesions ( Gann, 1991 ) . Phonophoresis and extracorporeal daze wave therapy ( ESWT ) are two ultrasound therapy signifiers used clinically ; phonophoresis uses a medicated unction which acts as a matching media ( Kanikkannan et al. , 2000 ) . ESWT uses higher energy concentration which farther could be modulated with the usage of modified lithotripter ( Loew et al. , 1999 ) . Ultrasound affects the tissues and cell in a organic structure via either thermic or non-thermal physical mechanisms ( Speed, 2001 and Young, 2002 ) . When ultrasound is given to a patient, a portion of it is absorbed taking to heat coevals within the tissues it travels through. The soaking up by the tissue depends on the frequence of ultrasound used and the tissue belongingss like the nature and the vascularization grade. Ultrasound is absorbed more by tissues wit higher protein content as compared to those with higher fat content. In some scenarios the usage of ultrasound gives bio-effects without affecting of import temperature alterations, like low strength spacial mean temporal norm ( SATA ) . To produse the non-thermal consequence in ultrasound, one or more of the physical processs cavitation, standing moving ridges and acoustic cyclosis, are used. Even though ultrasound has become an of import curative facet used in physical medical specialty, the construct of dealingss between biological system and sound moving ridges have non been explained decently ( Bradnock et al. , 1996 ) . Ultrasound is normally employed for redness decrease and tissue fix sweetening in the intervention of soft tissue harm and is most effectual on recent soft tissue lesions ( Hashish et al. , 1986 ) . There are merely some clinical appraisals available to mensurate the efficaciousness of ultrasound intervention in soft tissue harm even though it is widely used. The most common intervention given by physical therapists are for hurts related to soft tissue like those located in joint capsule, corium, sinews and ligaments ( Dyson, 1987 ) . Survey shows that within Britain, physical therapists who use ultrasound for intervention constitute 20 % in NHS and 54 % of all private intervention as in 1985 ( Haar, 1987 ) . The benefits and effects of intervention given does non acquire decently assessed unless there is sufficient scientific and clinical grounds to back up the same. This essay has been done maintaining in head this point in head and is aimed at reexamining the literatures available to measure the effectivity of utilizing ultrasound in handling soft tissue amendss and hurts. This essay is made to reexamine available literatures to measure the clinical and scientific grounds in support of utilizing ultrasound therapy in handling soft tissue hurt every bit good as to place of import countries that could be utilized in future research that could be carried out to develop and heighten the current cognition and apprehension of the topic.LITERATURE REVIEWSAs per Dyson ( 1987 ) , there are three overlapping phases in the fix of soft tissue hurts, viz. early and late ague redness, proliferation and remodeling. Young ( 2002 ) points about an highly dynamic inflammatory stage when a figure of cell s like mast cells, thrombocytes, neutrophils and macrophages come in and travel off from the affected country or lesion site. Harmonizing to the surveies, curative ultrasound has the ability to speed up the fix by interacting with these cells and command their activities ( Young 2000 ) . Harmonizing to a randomized controlled double blinded survey based on an experimental reading on human abdominal tissue conducted by Snow and Johnson ( 2003 ) indicate that the dose of curative ultrasound given to the topics did bring forth anti inflammatory consequence. However, the research worker was non confident sing the consequence and has stated farther that the clinically applied ultrasound was non better than anti inflammatory consequence produced by placebo. Harmonizing to a randomized two-base hit blinded controlled test survey done on topics following a remotion of wedged lower 3rd molar surgically with a entire engagement of 150 topics, Hashish et al. , ( 1986 ) found that the puffiness was reduced significantly in ultrasound group every bit good as placebo group in contrast with the control group which was non treated. It was besides noted that the highest anti inflammatory consequence was attained at the lowest strength ( 0.1 and 0,5 Wcm-2 ) and lowest anti inflammator y consequence was noticed at highest strength ( 1.5 Wcm-2 ) . The placebo group was besides noticed to give similar consequences that were seen at lower strength of ultrasound, which indicates the consequence of curative ultrasound consequence was comparable to placebo every bit good. The research worker besides fails to explicate if the good consequence at low frequence of ultrasound was noticed because of thermic effects or non thermic effects. Harmonizing to Dyson ( 1987 ) , mast cells and thrombocytes get activated and let go of substances like chemotactic agents which have the ability to pull to the injured country polymorph atomic leukocytes and monocytes to originate a fix when there is soft connective tissue hurt. Dyson and Young ( 1990 ) conducted an in-vitro controlled experimental survey on macrophage-like cell line. It was found that uninterrupted exposure to ultrasound for 5 proceedingss at 0.75 MHz appeared to be advantageous as compared to the same continuance for 3.0 MHz exposure, in release of fibroblast effectual substances from cells likely by bring forthing permeableness alterations. This leads to a release of performed mitogenic substances that involves stable cavitation. On the other manus, exposure to 3.0 MHz does look to excite the cell, the synthesis and secernment of fibroblast mitogenic substances go on a small subsequently by the cells normal secernment procedure. Ultrasound has the ability to excite histamine release by degranulation from the mast cell in vitro every bit good as vivo ( Hashish, 1986 and Fyfe & A ; Chahl, 1982 ) . The release of chemotactic agents is besides possible as these are besides present in the mast cells. Due to these grounds, curative ultrasound intervention is effectual if given within a few hours of the hurt. The stimulation in degranulate of mast cells with the application of ultrasound could perchance be due to increase in its permeableness to calcium as a consequence of ultrasound. At this phase of the hurt, the major chemical secreted that modifies the hurt environment is histamine ( Young, 2002 ) . Some surveies carried out by different research workers have besides shown conflicting results for the curative ultrasound in intervention of soft tissue hurts. Harmonizing to Baker ( 2001 ) , small cogent evidence is present to back up that active ultrasound therapy is more effectual in handling hurting or assorted musculoskeletal jobs than placebo. Harmonizing to a survey conducted by Middlemast & A ; Chatterjee ( 2003 ) on effectivity of curative ultrasound in intervention of soft tissue hurt concludes that curative ultrasound is really effectual in handling the status and is even more effectual if applied under 24 hours of the hurt. It farther provinces that there is an appreciable decrease in swelling every bit good with the application of ultrasound therapy. Harmonizing to Binder et Al ( 1985 ) who did a randomized controlled survey on ultrasound effectivity in handling sidelong epicondylitis, if the inflammatory province of the hurt remains for a long period so the response to ultrasound intervention is hapless. Another research carried out by Makuloluwe & A ; Mouzas ( 1977 ) that deals with intervention of sprained mortise joint indicates that ultrasound therapy is effectual in soft tissue hurt. It farther clarifies that the mechanical quivers from ultrasound increases the flow of blood, permeableness of capillaries and tissue metamorphosis. These mechanical quivers are generated by change overing high frequence jumping current generated by an electrical generator in the ultrasound. Nyanzi et Al. ( 1999 ) did a survey on the dosage and clip continuance of ultrasound and found that it had no benefit over utilizing assumed ultrasound in handling sidelong ligament sprains of the ankle articulation. Harmonizing to a survey carried by Bradn ock et Al. ( 1995 ) , low frequence ultrasound had really good consequence which showed instantly after the ultrasound therapy I intervention of mortise joint sprains. A survey carried out by Young ( 2002 ) states that the proliferative period of the healing procedure comprise of cell incursion of lesion, angiogenesis, matrix deposition, hurt decrease and re-re-epithelisation. Low & A ; Reed ( 2000 ) province that this phase of connective tissue model is accompanied by fibroblast of fresh blood vass. Dyson ( 1987 ) states that the proliferation begins after three yearss of the hurt and during this clip the cells are attracted to the cut and fresh blood vass are regenerated. The connective tissue matrix chiefly produces fibroblasts and contributes toward wound contraction. The curative ultrasound when right applied is expected to rush up the fix procedure by impacting the endothelial cells which is required for angiogenesis. The contraction rate can be accelerated by application of curative ultrasound therapy to the hurt during its sensitive phase ( Dyson, 1987 ) . At this phase, contractile myofibroblast temporarily develops and the contraction leads to the decrease in the size of the lesion. Ultrasound therapy may besides act upon the contraction of the lesion via effects from macrophages that in bend accelerates the production of contractile cells in the injured country. Barry et Al. ( 1990 ) carried out an experimental survey based on effects of ultrasound therapy for handling Achilles sinews in mice and noticed that there was an addition in the synthesis of collagen in the treated sinews as compared with the sinew that was non treated and the consequences showed consistence with the addition in collagen synthesis and better strength of the repaired sinew. Dyson and Pond ( 1970 ) conducted a controlled experimental test on pinnule of coney ear and concluded that ultrasound therapy AIDSs in tissue regeneration. They farther added that the most effectual application for maximal tissue regeneration was noticed when pulsed ultrasound was given at 3MHz. they ruled out any the function of thermic effects in regeneration of tissues. They noticed that when ultrasound was applied to connective tissues so a morphological change in fibroblast cells was found that could be associated to the accelerated coevals of the units of molecular constituent of collagen. Dyson & A ; Young ( 1990 ) conducted an experimental controlled survey on lesions in grownup rat ‘s wing tegument after exposing to 0.1 tungstens / square centimeter SAT, and frequence of 0.75 MHz or 3.0 MHz of ultrasound therapy. A really high grade of vascularization was found in the two groups treated with ultrasound than the control group. It besides confirmed that the early stage of fix is accelerated by the usage of ultrasound. But, after 7 yearss of intervention, there was no important difference between the treated and the control group. They besides concluded that ultrasound given at 0.75 MHz. had better consequence than 3 MHz, bespeaking a possible engagement of non-thermal ultrasound constituent. Harvey et Al. ( 1975 ) conducted a controlled experimental survey on human fibroblast and indicated that the protein synthesis in fibroblast could be stimulated by the usage of curative ultrasound. They besides indicated that extremist structural alterations like permeableness alteration which has possible part in stimulation mechanism are besides induced by the intervention. Webster et Al. ( 1980 ) did a in-vitro controlled survey on human embryologic fibroblast and stated that the physical mechanism of cavitation is involved in actuating the synthesis of proteins in fibroblast when curative ultrasound is applied. They besides indicated that the the fibroblast stimulation gets suppressed with the application of force per unit area of 2 ambiance in the irradiation procedure. It therefore suggests that the responsible physical mechanism is nil but cavitation. Dyson and Young ( 1990 ) reported macrophage that generate fibroblast mitogenic factor could be stimulated by ultrasound therapy using the important function played by cell line U937in wound repairing moving as a scavenger cell in the debridement of lesions every bit good as a beginning of of import factors that stimulate the fix. Dyson and Sucking ( 1987 ) performed a randomised controlled test survey on worlds with chronic ulcer andA A foundA that tissue fix is causedA due toA alteration in diffusion rate and membrane permeableness obtained as a consequence of acoustic steaming and warming doing stimulation of tissue fix byA alteringA the clip taken for protein synthesisA .and besides found that cavitationA leads to alter in the protein synthesis by fibroblast. A In the survey conducted by Young ( 2002 ) it is found that remodelling stage of woundA tooks longer or less timeA depending upon theA A A the nature of tissue involved in the hurt as due to injuryA change inA A the tensile strength. collegen content, cellular nature of lesion occurs. Webster et Al, . ( 1980 ) conducted a controlled experimental survey designA and found that collagen synthesis in human fibroblastA occurs due to cavitation consequence obtained by ultrasound application in vitro, diploidA , embryonicA fibroblast of human. .It is besides ascertained thatA addition in tensile strength and granulation tissue formation occurs due to increased collagen synthesis. IncreasedA tensile strength and absorptionA capacity of sinew caused due to applicationA of uninterrupted ultrasound is observedA by an experimental controlled survey done by Enwemeka et al. , ( 1990 ) A who treatedA right tendo-calcaneous of coney with uninterrupted ultrasound.Researcher concluded that high strength sonication is non required to enhanceA A mending strength of sinew. Though this findingA is different for worlds. InA another experimental survey performed by Barry et al. , ( 1990 ) on Achilles sinew hurts in rats it is observed that ultrasound enhances the rate of sinew fix when uninterrupted ultrasound therapy of 1.5 Watt / square metre is applied on rat Achilles sinew. ThisA consequence may be found different for worlds.Critical analysis of the literatureTo heighten the application of ultrasound, specifically concentrating the patient attention for people enduring from soft tissue hurts, a systematic analysis and reexamine all facets of available survey was done. Thi s was carried out in order to happen out if the consequences and effects inferred by assorted surveies done antecedently in the same field render biological principle that could be taken into history for the application of ultrasound for soft tissue hurts. Baker et al. , ( 2001 ) carried out a reappraisal on bio-physical effects of curative ultrasound. The research worker brought frontward the fact that the by and large characterized ultrasound ‘s biophysical effects do non happen in vivo ; nor has the same been confirmed to possess any clinical impact under described scenarios. The survey besides suggests the absence of bio-physical groundss that can function as scientific land for curative ultrasound usage for attention among patients who suffer with soft tissue hurts. However, most of the surveies carried out on the capable affair by assorted research workers have explained the biological effects of ultrasound with the usage of vitro surveies. For case, Webster D F et al. , ( 1980 ) performed an experimental in-vitro controlled survey on primary, diploid human embryologic fibroblast. The survey was carried out to happen the function of ultrasound induced cavitation in the in vitro stimulation of collagen synthesis in human fibroblasts. It was found that collagen synthesis was stimulated similar to general protein synthesis with the application of ultrasound-induced cavitation. Such an extrapolation of consequences that were derived in-vitro to intact tissue behaviour, treated at similar curative ultrasound degree had to be approached meticulously. Prior to this survey there was no other survey to strongly show cavitation in tissues with curative degree of ultrasound that were treated in-vivo. However, it can be commented that cavitation that stimu lates protein synthesis in-vitro stimulation in human fibroblasts might non be aroused in-vivo. Furthermore, application of the consequences from the survey would non be possible on human tissue because of the changing environmental conditions and the existent consequence could seldom occur, when the human organic structures own defensive mechanism takes control. Per Baker et al. , ( 2001 ) , extrapolation of in vitro surveies to in vivo scenarios by allowing for reasonable impact of homoeostatic mechanism of the organic structure and by commanding and supplying similar dose would be a hard undertaking to achieve. Barry et al. , ( 1990 ) carried a research on the consequence of ultrasound therapy on the Achillies tendon fix hurts that was experimented on rats. The research worker must hold experienced issues wile generalizing the rats study on human tissues due to aforesaid issues of differences in tissue constructions, difference in sizes etc. Ultrasound enacts otherwise in different environments, even though all attempts are made by the research worker to supply curative ultrasound dosage during experimentation and license for chairing impact of human organic structure ‘s homeostatic mechanism. Similarly, Young and Dyson ( 1990 ) performed a survey to find the impact of ultrasound on angiogenesis. It was done to look into the consequence of curative ultrasound on new blood cells formation in full thickness, exercised lesions in wing teguments of the grownup rats and was assessed utilizing micro focal X ray techniques. There was no reference of the manner of ultrasound used for the survey – that is whether the ultrasound manner was uninterrupted or pulse. Explanation was non provided by the research worker sing the physical mechanism of ultrasound that was involved in the survey for stimulation of angiogenesis. Further there is a high possibility of job that must hold been experienced during the survey while generalizing carnal survey on human tissues. ADecisionWith the recent promotion in medical and healthcare engineerings, the handiness of relatively cheaper, little and portable handheld diagnostic medical equipments, there has been a wide-spread usage of ultrasoun d for the intervention of soft tissue hurts. Basically, Ultrasound is the usage of acoustic energy that increments cellular protein synthesis by originating cellular activity. At a cellular degree, it stimulates mechanical quivers for micro indulgent intervention at cellular degree with the usage of high frequence sound moving ridges and is really effectual for the intervention of soft tissue hurts, joint conditions and chronic instances. The usage of ultrasound instigates mending of surgical lesions and sores by cut downing puffinesss and handling them with minimum fibrosis and heightening vascularization. Numerous surveies have assessed chronic chapters or the 1s where the intervals have non been mentioned and there are deductions of ultrasound ‘s important importance in the usage of first phases of an hurt. As a affair of pick, to relieve musculus cramp and hurting that will increment tissue extensibility, ultrasound can be conspicuously be used because of its healing effec ts. Ultrasound can besides be used in combination with stretching exercisings to derive optimum tissue length ( Reed & A ; Ashikaga, 1997 ) . In the normal articulatio genus ligament ( Ellis, 1962 ) , and in cicatrix tissue ( Noyes et al, . 1974 ) , the usage of thermic doses of ultrasound has shown lengthening. When the tissue is heated to an appropriate temperature, application of ultrasound increases the opportunity to widen the tissues last for 10 proceedingss, A A A prior to the targeted tissue coming back to normal temperature ( Frankel & A ; Nordin, 1980 ) . It is of extreme importance to do certain that the mechanicalA consequence of low-frequency ultrasound and thermalA consequence of high-frequency ultrasound are maintained moderately good. Perfusion, hurt granulation acceleration, hurt cleaning and metabolic intensification are included under the physiological consequences of low frequence ultrasound. It is notable that optimum curative effectivity of ultrasound can be achieved at dosage ( W/cm2 ) andA dose ( series and frequence of application ) . Mechanism of interconnectedness and coaction between biological systems and sound moving ridges stands to be inconclusive, even though legion outstanding researches have been done to understand the physical, psychological and physiological systems implicated to ultrasound therapy intervention. Although several important trials and surveies have been done in-vitro every bit good as on animate beings to understand the biological effects of ultrasound, ill-defined enigma prevails about the ultrasound therapy action in instances of soft tissue hurts that still need to be ventured into. Similarly, to apologize the biological impacts in usage of curative ultrasound, there are deficient groundss available. There needs to transport out more strict in vivo surveies and researches to cognize these inside informations that can assist to utilize ultrasound in a more optimum mode to handle soft tissue injuries.A ( Word Count: 3371 )

Does 16 and Pregnant Promote or Prevent Pregnancy? Essay

Many have seen or heard of the television series â€Å"16 and Pregnant.† In 2009 this series began with the intention to show teens how difficult it is to be a parent. While â€Å"16 and Pregnant† has been playing for many years now, the debate has been sparked whether the show promotes or prevents pregnancy. Many people think that â€Å"16 and Pregnant† promotes pregnancy. The show makes being a parent look more glamorous then difficult. They make it look easier and even more â€Å"fun† to be a teenage parent. Many teenagers who watch the show see girls becoming more and more famous. The girls start other shows or even end up in magazines. When young people see this it makes them think that they could become famous if they have a child. The show gives teenagers false hope that they will also get to be on a TV show if they have a baby at a young age. As the show goes on you see the teen parents with new houses, cars, and even new wardrobe and style. The â€Å"16 and Pregnant† stars get paid at least $75,000 a season depending on their contract. When teenagers see all the new things that they could have they get the idea that getting pregnant could reward them with many new things. The stars say they can’t finish school, and get a job because of the difficulty of caring for a child interferes with their time to do so. With the salary that they have they don’t have to worry much about getting a job. Teenagers might not want to have to work so they will think that if they get pregnant they won’t have to worry about it. When teenagers see the stars in magazines they will want to get pregnant so they could also be in magazines and on multiple shows. I believe that â€Å"16 and Pregnant† prevents pregnancy. The show is mostly accurate in showing how parenting is. It shows the actual difficulties of being a parent or having to deal with the decision of adoption. The young parents have to come to unwanted agreements with their child’s other parent and deal with custody through courts. It also shows how babies and children actually act and how difficult it is to take care of a child. There has  been an increase in the use of birth control and a drop in the amount of teenage births. â€Å"Social networking posts including the words ‘birth control’ increased by 23 percent.†(Kristof) Internet searches on birth control also increased. Regions where the show is watched more had â€Å"more of a drop in teen births† and there is overall â€Å"20,000 fewer teen births each year.†(Kristof) Those who say â€Å"16 and Pregnant† promotes pregnancy can agree that there has been an increase in the use of birth control. Also they can agree that there has been a decrease in teen pregnancy cases. Although these are true, there could be a different factor correlated to the increase in use of birth control. With an increase in the use of birth control there has been less cases of teen pregnancy. Many schools have sex education which helps teenagers understand the use of contraception. This could be a factor of the increase in birth control. Also, after watching â€Å"16 and Pregnant† many teenagers may have been persuaded to start using contraception. The increase of contraception use is preventing more teenagers from becoming pregnant. Reference Kristof, Nicholas. â€Å"TV Lowers Birthrate (Seriously).† The New York Times. The New York Times, 19 Mar. 2014. Web. 25 Mar. 2014.