Bioremediation

BIOREMEDIATION Bioremediation is such type of technology in which microorganism, fungi, bacteria, plant and there is use to convert polluted condition in to original condition. Through bioremediation process microorganism act on pollutant or on chemicals due to which pollution occur and help that thing to come back in its original condition. Bioremediation is an option to offers the possibility to destroy or renders various harmful thing through natural biological activity. PRINCIPLES OF BIOREMEDIATION Bioremediation is the field of environmental biotechnology . y definition bioremediation is the use of microorganism, to degrade environment pollutant in to less toxic form. in this microorganism may be indigenous to a contaminant area or may be isolated from different area and brought to that area. Microorganisms start utilizing toxic substance and convert in to non toxic form from toxic form. In bioremediation metabolic process is also involved through which different enzyme release and act on toxic substances or on contaminants due to this biodegradation occur. When microorganism bought to contaminated or polluted site to enhance degradation that process is called bioaugmentation. For bioremediation to be effective, microorganism must enzymatically attack the pollutants and converts them in to non toxic form. n Bioremediation has its limitation, some contaminants such as chlorinated organic compound and aromatic hydrocarbon are resistant to microbial attack . bioremediation techniques are typically more economical than traditional method. FACTORS OF BIOREMEDIATION These factors include the existence of a microbial population capable of degrading the pollutants, the availability of contaminants to the microbial population, the environment factor (soil,temperature,pH,the presence of oxygen or other electron acceptor, and nutrients. ) MICROBIAL POPULATION FOR BIOREMEDIATION PROCESS Microorganism isolated from from any environment condition. microbes adapt nd grow at subzero temperatures ,as well as extreme heat, in water with excess of oxygen and in anaerobic condition,with the presence of hazardous condition or hazardous compound or any waste stream. the main requirements are an energy source and a carbon source. because of microbes and other biological system ,these can be used to degrade or remediate environmental hazards. Microbes can be divide in to groups according to their activity and condition. Anaerobic- in the absence of oxygen. naerobic bacteria cannot used frequently as a aerobic bacteria. There is an increa sing interest in anaerobic bacteria use for bioremediation of polychlorinated biphenyls (PCBs)in river sediment,ination of dechlorination of solvent trichloroethylene(TCE),and chloroform Lingninolytic fungi-fungi such as the white rot fungus phanaerochaete chrysosporium have the ablity to degrade an extremely diverse range of persistent or toxic environmental pollutants. Common substrate used include starw,sawdust,or corn cobs. Methylotrophs-aerobic bacteria that grow utilizing methane for carbon and energy. the initialenzyme in the pathway for aerobic degradation,methane monooxygenase,has a broad substrate range and active against a wide range of compounds ,including the chlorinated aliphatics trichloroethylene and 1,2-dichloroethane For degradationnit is necessary that bacteria and contaminant in proper contact and in proper amount. Class of contaminants |Specific examples |Aerobic |Anaerobic |More potential sources | |Chlorinated solvents |Trichloroethylene | |+ |Drycleaners | | |Perchloroethylene | | |Chemical manufacture Electrical | |Polychlorinated biphenyls |4-Chlorobiphenyl | |+ |manufacturing Power station | | |4,4-Dichlorobiphenyl | | |Railway yards Timber treatment | | | | | |Landfills | |Chlorinated phenol |Pentachlorophenol | |+ | | |â€Å"BTEX† Benzene Toluene |+ |+ |Oil production and storage | | |Ethylbenzene Xylene | | |Gas w ork sites | | | | | |Airports | | | | | |Paint manufacture Port | | | | | |facilities Railway yards | | | | | |Chemical manufacture | |Polyaromatic hydrocarbons |Naphthalene Antracene |+ | |Oil production and storage | |(PAHs) |Fluorene Pyrene | | |Gas work sites Coke plants | | |Benzo(a)pyrene | | |Engine works Landfills | | | | | |Tar production and storage | | | | | |Boiler ash dump sites Power | | | | | |stations | | |Atrazine Carbaryl | | |Agriculture | | |Carbofuran Coumphos | | |Timber treatment plants | | |Diazinon Glycophosphate | | |Pesticide manufacture | |Pesticides |Parathion Propham |+ |+ |Recreational areas Landfills | | |2,4-D | | | | ENVIRONMENTAL FACTORS Nutrients Although the microorganisms are present in contaminated soil, they cannot necessarily be there in the numbers required for bioremediation of the site. Their growth and activity must be stimulated. Biostimulation usually involves the addition of nutrients and oxygen to help indigenous microorgan- isms. These nutrients are the basic building blocks of life and allow microbes to create the necessary enzymes to break down the contaminants. All of them will need nitrogen, phosphorous, and carbon (e. g. , see Table 2). Carbon is the most basic element of living forms and is needed in greater quantities than other elements. In addition to hydrogen, oxygen, and nitrogen it constitutes about 95% of the weight of cells. Table 2 Composition of a microbial cell. ElementPercentageElementPercentage |Carbon |50 |Sodium |1 | |Nitrogen |14 |Calcium |0,5 | |Oxygen |20 |Magnesium |0,5 | |Hydrogen |8 |Chloride |0,5 | |Phosphorous |3 |Iron |0,2 | |Sulfur |1 |All others |0,3 | |Potassium |1 | | | ENVIRONMENTAL FACTORS Nutrients Although the microorganisms are present in contaminated soil, they cannot necessarily be there in the numbers required for bioremediation of the site. Their growth and activity must be stimulated. Biostimulation usually involves the addition of nutrients and oxygen to help indigenous microorgan- isms. These nutrients are the basic building blocks of life and allow microbes to create the necessary enzymes to break down the contaminants. All of them will need nitrogen, phosphorous, and carbon (e. g. , see Table 2). Carbon is the most basic element of living forms and is needed in greater quantities than other elements. In addition to hydrogen, oxygen, and nitrogen it constitutes about 95% of the weight of cells. Table 2 Composition of a microbial cell. ElementPercentageElementPercentage Carbon |50 |Sodium |1 | |Nitrogen |14 |Calcium |0,5 | |Oxygen |20 |Magnesium |0,5 | |Hydrogen |8 |Chloride |0,5 | |Phosphorous |3 |Iron |0,2 | |Sulfur |1 |All others |0,3 | |Potassium |1 | | | Microbial growth and activity are readily affected by pH, temperature, and moisture. Although microorganisms have been also isolated in extreme conditions, most of them grow optimally over a nar- row range, so that it is important to achieve optimal conditions. If the soil has too much acid it is possible to rinse the pH by adding lime. Temperature affects bio- chemical reactions rates, and the rates of many of them double for each 10  °C rise in temperature. Above a certain temperature, however, the cells die. Plastic covering can be used to enhance solar warming in late spring, summer, and autumn. Available water is essential for all the living organisms, and irrigation is needed to achieve the optimal moisture level. The amount of available oxygen will determine whether the system is aerobic or anaerobic. Hydrocarbons are readily degraded under aerobic conditions, whereas chlorurate compounds are degraded only in anaerobic ones. To increase the oxygen amount in the soil it is possible to till or sparge air. In some cases, hydrogen peroxide or magnesium peroxide can be introduced in the environment. Soil structure controls the effective delivery of air, water, and nutrients. To improve soil structure, materials such as gypsum or organic matter can be applied. Low soil permeability can impede move- ment of water, nutrients, and oxygen; hence, soils with low permeability may not be appropriate for in situ clean-up techniques. BIOREMEDIATION STRATEGIES Different techniques are employed depending on the degree of saturation and aeration of an area. In situ techniques are defined as those that are applied to soil and groundwater at the site with minimal distur- bance. Ex situ techniques are those that are applied to soil and groundwater at the site which has been removed from the site via excavation (soil) or pumping (water). Bioaugmentation techniques involve the addition of microorganisms with the ability to degrade pollutants. In situ bioremediation These techniques [11,12] are generally the most desirable options due to lower cost and less disturbance since they provide the treatment in place avoiding excavation and transport of contaminants. In situ treatment is limited by the depth of the soil that can be effectively treated. In many soils effective oxy- gen diffusion for desirable rates of bioremediation extend to a range of only a few centimeters to about 30 cm into the soil, although depths of 60 cm and greater have been effectively treated in some cases. The most important land treatments are: Bioventing is the most common in situ treatment and involves supplying air and nutrients through wells to contaminated soil to stimulate the indigenous bacteria. Bioventing employs low air flow rates and provides only the amount of oxygen necessary for the biodegradation while minimizing volatiliza- tion and release of contaminants to the atmosphere. It works for simple hydrocarbons and can be used where the contamination is deep under the surface. In situ biodegradation involves supplying oxygen and nutrients by circulating aqueous solutions through contaminated soils to stimulate naturally occurring bacteria to degrade organic contaminants. It can be used for soil and groundwater. Generally, this technique includes conditions such as the infil- tration of water-containing nutrients and oxygen or other electron acceptors for groundwater treatment. Biosparging. Biosparging involves the injection of air under pressure below the water table to increase groundwater oxygen concentrations and enhance the rate of biological degradation of contam- inants by naturally occurring bacteria. Biosparging increases the mixing in the saturated zone and there- by increases the contact between soil and groundwater. The ease and low cost of installing small-diam- eter air injection points allows considerable flexibility in the design and construction of the system. Bioaugmentation. Bioremediation frequently involves the addition of microorganisms indigenous or exogenous to the contaminated sites. Two factors limit the use of added microbial cultures in a land treatment unit: 1) nonindigenous cultures rarely compete well enough with an indigenous population to develop and sustain useful population levels and 2) most soils with long-term exposure to biodegrad- able waste have indigenous microorganisms that are effective degrades if the land treatment unit is well managed. Ex situ bioremediation Ex situ bioremediation These techniques involve the excavation or removal of contaminated soil from ground. Landfarming is a simple technique in which contaminated soil is excavated and spread over a pre- pared bed and periodically tilled until pollutants are degraded. The goal is to stimulate indigenous biodegradative microorganisms and facilitate their aerobic degradation of contaminants. In general, the practice is limited to the treatment of superficial 10–35 cm of soil. Since landfarming has the potential to reduce monitoring and maintenance costs, as well as clean-up liabilities, it has received much atten – leum hydrocarbons they are a refined version of landfarming that tend to control physical losses of the contaminants by leaching and volatilization. Biopiles provide a favorable environment for indigenous aerobic and anaerobic microorganisms. Bioreactors. Slurry reactors or aqueous reactors are used for ex situ treatment of contaminated soil and water pumped up from a contaminated plume. Bioremediation in reactors involves the pro- cessing of contaminated solid material (soil, sediment, sludge) or water through an engineered con- tainment system. A slurry bioreactor may be defined as a containment vessel and apparatus used to cre- ate a three-phase (solid, liquid, and gas) mixing condition to increase the bioremediation rate of soil- bound and water-soluble pollutants as a water slurry of the contaminated soil and biomass (usually indigenous microorganisms) capable of degrading target contaminants. In general, the rate and extent of biodegradation are greater in a bioreactor system than in situ or in solid-phase systems because the contained environment is more manageable and hence more controllable and predictable. Despite the advantages of reactor systems, there are some disadvantages. The contaminated soil requires pre treat- ment (e. g. , excavation) or alternatively the contaminant can be stripped from the soil via soil washing or physical extraction (e. g. , vacuum extraction) before being placed in a bioreactor. Table 4 summarizes the advantages and disadvantages of bioremediation. Table 4 Summary of bioremediation str ategies. Technology |Examples |Benefits |Limitations |Factors to consider | |In situ |In situ bioremediation |Most cost efficient |Environmental constraints |Biodegradative abilities of | | |Biosparging Bioventing |Noninvasive Relatively |Extended treatment time |indigenous microorganisms | | |Bioaugmentation |passive Natural attenuation |Monitoring difficulties |Presence of metals and | | | |processes | |other inorganics Environmental| | | |Treats soil and water | |parameters Biodegradability of| | | | | |pollutants Chemical solubility| | | | | |Geological factors | | | | | |Distribution of pollutants | |Ex situ |Landfarming Composting |Cost efficient |Space requirements |See above | | |Biopiles |Low cost |Extended treatment time | | | | |Can be done on site |Need to control abiotic | | | | | |loss | | | | |Mass transfer problem | | | | | |Bioavailability limitation| | |Bioreactors |Slurry reactors |Rapid degradation kinetic |Soil requires excavation |See above Bioaugmentation | | |Aqueous reactors |Optimized environmental |Relatively high cost |Toxicity of amendments Toxic | | | |parameters |capital |concentrations of contaminants| | | |Enhances mass transfer |Relatively high operating | | | | |Effective use of inoculants |cost | | | | |and surfactants | | | Advantages of bioremediation †¢Bioremediation is a natural process and is therefore perceived by the public as an acceptable waste treatment process for contaminated material such as soil. Microbes able to degrade the con- taminant increase in numbers when the contaminant is present; when the contaminant is degrad- ed, the biodegradative population declines. The residues for the treatment are usually harmless products and include carbon dioxide, water, and cell biomass. †¢Theoretically, bioremediation is useful for the complete destruction of a wide variety of contam- inants. Many compounds that are legally considered to be hazardous can be transformed to harm- less products. This eliminates the chance of future liability associated with treatment and dispos- al of contaminated material. †¢Instead of transferring contaminants from one environmental medium to another, for example, from land to water or air, the complete destruction of target pollutants is possible. †¢Bioremediation can often be carried out on site, often without causing a major disruption of nor- mal activities. This also eliminates the need to transport quantities of waste off site and the poten- tial threats to human health and the environment that can arise during transportation. Bioremediation can prove less expensive than other technologies that are used for clean-up of hazardous waste. Disadvantages of bioremediation †¢Bioremediation is limited to those compounds that are biodegradable. Not all compounds are sus- ceptible to rapid and complete degradation. †¢There are some concerns that the products of biodegradation may be more persistent or toxic than the parent compound. †¢Biological processes are often highly specific. Important site factors required for success include the presence of metabolically capable microbial populations, suitable environmental growth con- ditions, and appropriate levels of nutrients and contaminants. It is difficult to extrapolate from bench and pilot-scale studies to full-scale field operations. †¢Research is needed to develop and engineer bioremediation technologies that are appropriate for sites with complex mixtures of contaminants that are not evenly dispersed in the environment. Contaminants may be present as solids, liquids, and gases. †¢Bioremediation often takes longer than other treatment options, such as excavation and removal of soil or incineration. †¢Regulatory uncertainty remains regarding acceptable performance criteria for bioremediation. There is no accepted definition of â €Å"clean†, evaluating performance of bioremediation is difficult, and there are no acceptable endpoints for bioremediation treatments. PHYTOREMEDIATION Although the application of microbe biotechnology has been successful with petroleum-based con- stituents, microbial digestion has met limited success for widespread residual organic and metals pol- lutants. Vegetation- based remediation shows potential for accumulating, immobilizing, and transform- ing a low level of persistent contaminants. In natural ecosystems, plants act as filters and metabolize substances generated by nature. Phytoremediation is an emerging technology that uses plants to remove contaminants from soil and water [14–16]. The term â€Å"phytoremediation† is relatively new, coined in 1991. Its potential for encouraging the biodegradation of organic contaminants requires further research, although it may be a promising area for the future. We can find five types of phytoremediation techniques, classified based on the contaminant fate: phytoextraction, phytotransformation, phytostabilization, phytodegradation, rhizofiltration, even if a combination of these can be found in nature. Phytoextraction or phytoaccumulation is the process used by the plants to accumulate contami- nants into the roots and aboveground shoots or leaves. This technique saves tremendous remediation cost by accumulating low levels of contaminants from a widespread area. Unlike the degradation mech- anisms, this process produces a mass of plants and contaminants (usually metals) that can be transport- ed for disposal or recycling. Phytotransformation or phytodegradation refers to the uptake of organic contaminants from soil, sediments, or water and, subsequently, their transformation to more stable, less toxic, or less mobile form. Metal chromium can be reduced from hexavalent to trivalent chromium, which is a less mobile and noncarcinogenic form. Phytostabilization is a technique in which plants reduce the mobility and migration of contami- nated soil. Leachable constituents are adsorbed and bound into the plant structure so that they form a stable mass of plant from which the contaminants will not reenter the environment. Phytodegradation or rhizodegradation is the breakdown of contaminants through the activity existing in the rhizosphere. This activity is due to the presence of proteins and enzymes produced by the plants or by soil organisms such as bacteria, yeast, and fungi. Rhizodegradation is a symbiotic rela- tionship that has evolved between plants and microbes. Plants provide nutrients necessary for the microbes to thrive, while microbes provide a healthier soil environment. Rhizofiltration is a water remediation technique that involves the uptake of contaminants by plant roots. Rhizofiltration is used to reduce contamination in natural wetlands and estuary areas. In Table 5, we can see an overview of phytoremediation applications. Table 5 Overview of phytoremediation applications. TechniquePlant mechanismSurface medium PhytoextractionUptake and concentration of metal viaSoils direct uptake into the plant tissue with subsequent removal of the plants PhytotransformationPlant uptake and degradation of organicSurface water, groundwater compounds PhytostabilizationRoot exudates cause metal to precipitateSoils, groundwater, mine tailing and become less available PhytodegradationEnhances microbial degradation inSoils, groundwater within rhizosphere rhizosphere RhizofiltrationUptake of metals into plant rootsSurface water and water pumped PhytovolatilizationPlants evaportranspirate selenium, mercury,Soils and groundwater and volatile hydrocarbons Vegetative capRainwater is evaportranspirated by plantsSoils to prevent leaching contaminants from disposal sites Phytoremediation is well suited for use at very large field sites where other methods of remedia- tion are not cost effective or practicable; at sites with a low concentration of contaminants where only polish treatment is required over long periods of time; and in conjunction with other technologies where vegetation is used as a final cap and closure of the site. There are some limitations to the technology that it is necessary to consider carefully before it is selected for site remediation: long duration of time for remediation, potential contamination of the vegetation and food chain, and difficulty establishing and maintaining vegetation at some sites with high toxic levels. .

Evolution of health care information system Essay

In this paper, we will compare and contrast Skilled Nursing Facilities from 20 years ago to today. Skilled Nursing facilities of today are both similar and different from what they were like two decades ago. Similarities comprise of the organizational structure, including different departments, and the various roles within those departments. The roles of nurses, doctors, administrators, and therapists have not changed much in the last 20 years, and it is still the same hierarchical approach where a top down approach to administration and management is used . The differences outweigh the similarities as many changes have taken place over the years. Most of the changes have been as a result of the advances in information technology in health care. Some of the differences include utilization of information systems such as e-mail for communication, documentation using electronic medical records (EMR), and utilization of advanced medical equipment. Two significant advances in health care information system over the last two decades has been the use of EMR and the advances in medical devices. These two advances have changed how care is being delivered in health care in general and more specifically, in skilled nursing facilities. Two decades ago, majority of documentation was done by hand, often resulting in disjointed, redundant documentation without the ability to extrapolate meaningful data for analytical and benchmarking purposes. By contrast with the current EMR documentation, there is very little duplication of documentation, and internal and external benchmarking is available for quality improvement purposes. Today’s skilled nursing facility is dependent upon computer and information systems to run practically every aspect of the organization. Billing systems, pyxis systems for medication dispensing, minimum data set documentation and transmission to The Centers for Medicare and Medicare Systems are just some examples of the use of computer technology used in nursing facilities of today. Skilled Nursing Facilities using outdated technology, hand- written documentation, and outdated medical equipment will have to adapt to and invest in technology and equipment if they want to stay competitive with the market. Information System in Skilled Nursing Facility of Today The skilled nursing facility that I currently work at is a long-term care facility founded in 2001 and is affiliated with a local nonprofit hospital. This 150-bed state-of-the-art facility has 40 sub-acute beds, 30 dementia beds, and the remainder, are long-term beds. The sub-acute unit has all private rooms. All beds are Medicare and Medicaid certified. This modern facility has electronic medical records and uses internal and external benchmarking data to track and trend data. They use this data to improve clinical and financial outcomes and as a result of this, have been able to improve their financial viability and have a five-star rating on the CMS Nursing Home Compare website. The physicians and nurses can access lab results, and x-ray results online via a secure connection. The admissions department can cost out patients medications and the rehabilitation department, in collaboration with the MDS coordinators can determine reimbursement based on patient needs, prior to the patient being admitted. Data is stored in a data warehouse (server) where it can be mined by authorized personnel only. The advanced medical equipment use has resulted in high level of job satisfaction and resulted in staff retention. Analysis of Data Used: 20 Years Ago to Now Twenty years ago, skilled nursing facilities did not have the ability to collect and analyze data. The need to collect data was there, and some manual data collection was done, but it was impossible to collect significant clinical and financial data and use it for analytical purposes. Fast forward 20years to the present and we now have the ability to have access to significant data that can be used to improve systems and processes for better outcomes. Of significance has been the minimum data set in nursing homes. The Minimum Data Set (MDS) is part of the federally mandated process for clinical assessment of all residents in Medicare and Medicaid certified nursing homes. This process provides a comprehensive assessment of each resident’s functional capabilities and helps nursing home staff identify health problems. Care Area Assessments (CAAs) are part of this process, and provide the foundation upon which a resident’s individual care plan is formulated. MDS assessments are completed for all residents in certified nursing homes, regardless of source of payment for the individual resident. MDS assessments are required for residents on admission to the nursing facility, periodically, and on discharge. All assessments are completed within specific guidelines and time frames. MDS information is transmitted electronically by nursing homes to the national MDS database at CMS. National and regional benchmarking is available through reports and government rates nursing homes based on these benchmarks. Examples of available benchmarking are percentage of restraints used, facility-acquired wounds, infection rates, falls, and decline in activities of daily living. Two Major Technological Advances influencing Health Care Information System (HCIS) Health care information systems are a prerequisite for coordinated, integrated, and evidence-informed health care. Introduction and use of EMR has changed how health care is delivered across the spectrum and will continue to change. It has allowed us to collect clinical data and use it to use evidence-based best practices. It has given the ability to decrease redundancy in documentation and increase patient safety by flagging medications that may be contraindicated if given in combination with another medication. Another major technological advance has been in the area of medical devices and equipment. Advanced medical devices used for diagnosis has helped detect diseases more rapidly and as a result, saved lives. The use of telemedicine is for patients who wish to remain in their homes versus a nursing home have been significant. Nurses can check patients’ vital signs frequently and collaborate with the physician to monitor patients and change treatment as needed before patient becomes acutely ill. This has lessened the need for the patients to be re-hospitalized, hence, better outcome for the patient as well as lesser financial impact. Formally defined, telemedicine is the use of medical information exchanged from one site to another via electronic communications to improve a patient’s clinical health status. Telemedicine includes a growing variety of applications and services using two-way video, e-mail, smart phones, wireless tools, and other forms of telecommunications technology. Conclusion There are some similarities and vast differences between the operations of a long-term care facility of today versus one from 20 years ago, specifically as it relates to information systems and how data was used than in comparison with the way it is used today. Today, every process, and system in a long-term care facility is dependent upon information technology to function. Financial and clinical outcomes are measured and compared with other organizations, both, nationally, and regionally to gauge and improve processes. One major technological advance has been in the area of use of EMR and access to patient information, such as lab results being readily available, enabling providers with quick decision-making ability. Another major technological advance has been in advanced medical equipment and telemedicine, allowing exchange of information for improved patient health status. Future advancement in information technology will change the way health care is delivered and facilities that embrace this change and use it to their advantage will come out ahead. References www. americantelemed. org/learn www. cms. gov www. lse. ac. uk

Genetic Engineering and Infertility - 1243 Words

Children are the brightness of life. Children are what make many sad people happy. Children are the future. This world is full of these tiny, energetic, innocent creatures. Most of the people have the chance to be a parent and have a child, but there are many that couldn’t. These people have problems. They are infertile people. These people wish to have kids. These people try so hard to fix their problems. One of four couples is infertile or dealing with infertility problems in developing countries, and one third to one half of these cases result from male infertility( Ethics for gene therapy). Blood test is what is used for measuring several factors that affect infertility (Salk Study). The question becomes can theses infertile people be parents? Based on many studies infertility can now be cured by gene therapy. There are many causes for male and female to be infertile. Infertility in men is when they are unable to produce sperm. The key that tells this man is infertile is changing in hair growth. ( Web Med) For male infertility there are many causes. There are three factors: genetic defects, hormonal imbalances, and anatomical problems. 90% of male infertility cases are due to low sperm count and poor sperm quality or both. Men who live a healthy life style are more likely to produce a healthy sperm. Smoking, alcohol, tight underwear, and stress are causes of infertility too. There is a small percentage of male infertility cause by hormonal problems. There also canShow MoreRelatedSale - Pro Plans Are 20% Off Today View Plans. Gradeproof1164 Words   |  5 PagesSentence Count: 28 Readability: 11.52 % Grade Level: 16.59 years Reading Time: 2 minutes Speaking Time: 4 minutes Type your title here... Genetic Engineering is a common theme of Gattaca, Splice, and Blade Runner. 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The Convicts, by Iain Lawrence, is a story of a young boy...

The Convicts, by Iain Lawrence, is a story of a young boy who faces great odds to complete his quest to help his father. This novel takes many twists and turns through the landscape of London, more specifically in nineteenth century London. However, London is not described in the picturesque view many people have come to know London as. Lawrence shows the uglier more rugged lifestyle of many poor people in London during this time period. Within a society like this in London, swindling, gangs, and prison become common subjects among the lower classes, especially in this novel. Although life was hard for many, the characters in this novel find adventure along the way while aboard ships and through underground sewers. The main character, Tom†¦show more content†¦A man by the name of Alex Goodfellow has swindled Tom’s father of his money after apparently selling him an outstanding vessel along with its own crew. Instead, Mr.Goodfellow gave tom’s father the exact opposite, a rundown ship which was bound to cause problems. Eventually, the ship Tom’s father once thought was his big break, had sunk while Mr. Goodfellow reaped the insurance reward. To make matters even worse, Tom’s father was put in debtor’s prison. Tom struggled with the thought of his father going to prison for something which wasn’t actually his fault, so Tom decided to take action. He made a plan to run away and get revenge on his father’s swindler. Along the way he met an interesting character who was blind. Knowing that the man possessed a rare jewel, Tom took it in the hopes it would bring provide him money for his family the much needed money. Further into his journey, To m comes across a gravedigger named Worms. Worms teaches Tom how to dig up the bodies of the dead and introduces him to other robbers. Interestingly enough, these robbers are kids just like Tom, who rob from people living amougst them in the sewers. Tom befriends Darkey and Benjamin Penny, who teach Tom their robbing ways. Then, things take a turn for the worst. The police find Tom robbing another man and arrest him. However, in one of the biggest plot twists, Tom is found not found guilty for robbing, but for murder. Of course Tom did notShow MoreRelatedOne Significant Change That Has Occurred in the World Between 1900 and 2005. Explain the Impact This Change Has Made on Our Lives and Why It Is an Important Change.163893 Words   |  656 Pagesby Susan Porter Benson, Stephen Brier, and Roy Rosenzweig Also in this series: Paula Hamilton and Linda Shopes, eds., Oral History and Public Memories Tiffany Ruby Patterson, Zora Neale Hurston and a History of Southern Life Lisa M. Fine, The Story of Reo Joe: Work, Kin, and Community in Autotown, U.S.A. Van Gosse and Richard Moser, eds., The World the Sixties Made: Politics and Culture in Recent America Joanne Meyerowitz, ed., History and September 11th John McMillian and Paul Buhle, eds

Gender, Gender And Gender - 932 Words

This week’s materials have many commonalities found throughout the text, which challenges the representation of gender identity in last week’s materials. One of the similarities found throughout this week’s materials is that gender is complex. Professor Davis’s lecture â€Å"Sex Gender – It’s Complicated† defines â€Å"Binary gender: man or women, female or male, and masculine and feminine. Two distinct categories† (slide 5). The Western society mostly see gender as binary, black and white. However, Baird writes in â€Å"Transgender: ‘as the stars in the sky’† that â€Å"most of us are culturally heavily conditioned to categorize sex and gender in this binary, dimorphic way. But actually, life and nature are a lot more complex than that† (pg 113). Professor Davis exemplifies binary gender in the Western culture using public restroom as an example. 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Dylan Thomas The Life And Work Essay Example For Students

Dylan Thomas The Life And Work Essay Dylan ThomasThe Life and WorkOne: I am a Welshman;two: I am a drunkard;three: I am a lover of the human race,especially of women. A quote by one of the best-known British poets of the mid-20th century, he is remembered for his highly original, obscure poems, his amusing prose tales and plays, and his turbulent, well-publicized personal life. His name, Dylan Thomas. Dylan Marlais Thomas was born on October 27, 1914 in Swansea, Glamorganshire (Wales). He was educated at Swansea Grammar School and spent most of his childhood writing poetry and bunking school. His father was the senior English Literature Master at Dylan’s school, but not even his father could prevent him from skipping school and writing poetry. It has been said that Dylan had an extremely wild imagination and that it was â€Å"Freed† by him playing in a near by park as a young boy. His ambition from those early imaginative years was to be a great poet like Keates and the other great poets before him. Although his poetry was described as obscure even from the early days of his life, he had a very specific style of writing poetry. He wrote about his surroundings in the beautiful welsh countryside and little town that he grew up in. Before the publishing of Thomas first book in 1934, he worked as a reporter between 1931-1932, for The South Wales Daily Post, in Swansea. T hen he worked as a free-lance writer from 1933 at this time he also took part in the local theatre and expressed his acting skills. One of his first plays was a part in the Merchant Of Venice and it was said whilst he was involved in the theatre he spent most of his free time in the nearby pub-this was supposadely the beginning of his life long drinking problem. Thomas first book, 18 Poems was published as the result of a prize. Thomas was only 19 when this volume of poetry was released. He wrote nearly 30 poems in late 1933 and early 1934, of which 13 were published in this volume. Between May and October 1934, he completed another five for inclusion in the book. The Thomas poems first appeared in the Sunday Referee in 1933 in a feature column called the Poets Corner, edited by Victor Neuburg and Runia Sheila MacLeod. Neuburg began to award prizes to poets whose work was judged to be the finest printed in the column over a period of six months. The prize was that the Sunday Referee would publish the winning poets work in book form. Dylan Thomas became the second recipient of the prize, which he won for the second of seven poems he published in Poets Corner, the poem, The Force that through the Grass Fuse Drives the Flower. The editors had some difficulty getting Thomas manuscript accepted by a publisher, until David Archer of the Parton Boo kshop agree d to have the book printed. Five hundred copies were printed, but only 250 were bound and issued in December 1934. The remaining half, constituting the second issue, were bound and put on sale on February 21, 1936. It was praised by few because it was so obscure. In 1934 he went to live in London for a while and loved living the bohemian life style but he always came back to the welsh countryside where he would be inspired to write great poetry. His favourite place as a child and an adult to return to was his Aunts farm in the west of the welsh countryside called â€Å"Fern Hill†. This was to be the inspiration for one of his greatest poems of his career. Fern Hill is a wonderfully crafted description of how Thomas’ childhood imagination runBibliographywww.dylanthomas.comPoetry Essays

Reinforcement and Punishment in Our Daily Life free essay sample

Reinforcement is a term in operant conditioning and behaviour analysis for the delivery of a stimulus, (immediately or shortly) after a response, that results in an increase in the future rate or probability of that response. The response strength is assessed by measuring frequency, duration, latency, accuracy, and/or persistence of the response after reinforcement stops. Experimental behaviour analysts measured the rate of behaviours as a primary demonstration of learning and performance with non-humans.For example, rate is measured as the number of times a pigeon pecks a key in a 10 minute session. Reinforcement is the stimulus, event, or situation whose presentation is dependent upon a response. B. F. Skinner, the researcher who articulated the major theoretical constructs of reinforcement and behaviourism, defined reinforcement according to the change in response strength rather than to more subjective criteria, such as what is pleasurable or valuable to someone. Accordingly, activities, foods or items considered pleasant or enjoyable may not necessarily be reinforcing (because they produce no increase in the response preceding them). We will write a custom essay sample on Reinforcement and Punishment in Our Daily Life or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Stimuli, settings, and activities only fit the definition of reinforcement if the behaviour that immediately precedes the potential reinforcement increases in similar situations in the future. For example child who receives a cookie when he or she asks for one. If the frequency of cookie-requesting behaviour increases, the cookie can be seen as reinforcing cookie-requesting behaviour. If however, cookie-requesting behaviour does not increase, the cookie cannot be considered reinforcing.Reinforcement theory is one of the motivation theories; it states that reinforced behaviour will be repeated, and behaviour that is not reinforced is less likely to be repeated. The sole criterion that determines if an item, activity, or food is reinforcing is the change in probability of behaviour after administration of that potential reinforcement. Other theories may focus on additional factors such as whether the person expected the strategy to work at some point, but in the behavioural theory, reinforcement is descriptive of an increased probability of a response. Primary reinforcementA primary reinforcement, sometimes called an unconditioned reinforcement, is a stimulus that does not require pairing to function as reinforcement and most likely has obta ined this function through the evolution and its role in species survival. Examples of primary reinforcement include sleep, food, air, water, and sex. Other primary reinforcement, such as certain drugs, may mimic the effects of other primary reinforcement. While this primary reinforcement is fairly stable through life and across individuals, the reinforcing value of different primary reinforcement varies due to multiple factors (e. . , genetics, experience). Thus, one person may prefer one type of food while another abhors it. Or one person may eat lots of food while another eats very little. So even though food is a primary reinforcement for both individuals, the value of food as reinforcement differs between them. Secondary reinforcement A secondary reinforcement, sometimes called a conditioned reinforcement, is a stimulus or situation that has acquired its function as reinforcement after pairing with a stimulus that functions as reinforcement.This stimulus may be a primary reinforcement or another conditioned reinforcement (such as money). An example of a secondary reinforcement would be the sound from a clicker, as used in clicker training. The sound of the clicker has been associated with praise or treats, and subsequently, the sound of the clicker may function as reinforcement. As with primary reinforces, an organism can experience satiation and deprivation with secondary reinforces. 3. 1 Increase of desire Positive reinforcement A positive reinforcement may be used as part of a behaviour intervention plan (BIP). Unlike negative reinforcement, positive reinforcement are strategies used to help increase targeted behaviours in students who are experiencing academic or behavioural problems at home and school. How is Positive Reinforcement Used? Positive reinforcement helps students learn behaviours necessary to be successful academically and socially. For example, a students behaviour goal may be to increase the amount of time he stays on-task in class. Positive reinforcement would be used as a reward for improving over a period of time.Positive reinforcement includes any actions, consequences, or rewards that are provided to a student and cause an increase in desired behaviour. They may include rewards and privileges that students like and enjoy. For example, a student may earn physical rewards such as school supplies, healthy snacks, or choice of free-time activities. When choosing a positive reinforcement, it is important for the IEP team to know the child well. If possible, it can be helpful to allow the child to help choose the type of positive reinforcement he would like to earn.Examples: Positive reinforcement increase a students targeted behaviours. Positive reinforcement is similar to rewards, but they are also intended to increase behaviours over time. They are not just a one-time reward for good behaviour. 3. 2 Drawbacks of Positive Reinforcement Positive reinforcement may seem to be an ideal technique to increase certain positive behaviours. Managers may be able to motivated employees using positive reinforcement techniques. However, there can be some drawbacks. First, the use of positive reinforcement techniques may result in people becoming more extrinsically motivated.Extrinsic motivation may undermine creativity. In Amabiles (1985) experiment, people were asked to write two poems. Before writing the second poem, some people were given a questionnaire in which they were asked to rank the importance of some reasons for writing. In one condition, these reflected extrinsic motivation. In another condition, they reflected intrinsic motivation. In the control condition, people did not receive a questionnaire with reasons for writing. The poems in the extrinsic-orientation condition were judged to be less creative, on the average, than the poems in the control condition.Second, the ideal employee may be one who is intrinsically motivated and does not require constant supervision. Intrinsically motivated employees may be less likely to be late. They also may be more likely to excel at their jobs. Thus, positive reinforcement techniques may not lead to ideal employees in a company. 3. 3 Effect of Positive reinforcement for children Positive Reinforcement Can Improve Your Childs Behaviour: Using positive reinforcement is an easy way to nix behaviour problems. You can use positive reinforcement can help you encourage your child to do everyday tasks you need her to perform.Turning off an annoying song when a child asks their parent is an example of negative reinforcement (if this results in an increase in asking behaviour of the child in the future). Another example is if a mouse presses a button to avoid shock. Do not confuse this concept with punishment. There are two variations of negative reinforcement: oAvoidance conditioning occurs when behaviour prevents an aversive stimulus from starting or being applied. oEscape conditioning occurs when behaviour removes an aversive stimulus that has already started. A lot of students are confused about negative reinforcement.Whats the difference between that and punishment? Perhaps some examples of negative reinforcement would be helpful (remember, its reinforcement so the behavior increases, and because its negative, the reinforcement is removed after the response). Negative Reinforcement strengthens behaviour because a negative condition is stopped or avoided as a consequence of the behaviour. Punishment, on the other hand, weakens behaviour because a negative condition is introduced or experienced as a consequence of the behaviour. Here are two examples of Negative Reinforcement: 1.A rat is placed in a cage and immediately receives a mild electrical shock on its feet. The shock is a negative condition for the rat. The rat presses a bar and the shock stops. The rat receives another shock, presses the bar again, and again the shock stops. The rats behaviour of pressing the bar is strengthened by the consequence of the stopping of the shock. 2. Driving in heavy traffic is a negative condition for most of us. You leave home earlier than usual one morning, and dont run into heavy traffic. You leave home earlier again the next morning and again you avoid heavy traffic.