Rafael Lopez Perez Essays - Waste Management, Industrial Ecology

Rafael Lopez Perez TOXIC WASTE Pollution Prevention GENERAL CONSIDERATIONS DEFINITIONS Pollution prevention consists of all those activities that reduce the generation of hazardous waste. Many terms are used to describe these activities: waste minimization, waste reduction, source reduction, waste diversion, pollution prevention, recycling, and reuse. In a recent policy statements EPA suggested the following hierarchy for management of wastes: * Source reduction * Recycling * Treatment * Disposal In plant practices that reduce, avoid or eliminate the generation of hazardous waste as to reduce risks to health and the environment. Actions taken away from the waste generating activity, including waste recycling or treatment of wastes after they are generated, are not considered waste reduction. Also, an action that merely concentrates t hazardous content of a waste to reduce waste volume or dilutes it to reduce degree hazard, is not considered waste reductions The somewhat broader term pollution prevention has an evolving definition that includes: * Managing chemicals to reduce risk * Identifying and estimating all releases * Waste minimization VOLUME REDUCTION An appropriate place to initiate waste minimization investigations is to examine way: to reduce the volume of hazardous waste. This can be accomplished by a number methods including modifying production processes, segregation, and re-use. It should be noted that under some regulatory schemes, simply reducing the volume of the waste without an accompanying reduction in toxicity would not be considered was minimization. Process Modifications Process modifications include changes in: ? Raw materials ? Equipment & Operating procedures ? Materials storage ? End products Hunt suggests the following additional measures to reduce dragout: ? Increase drain time ? Air knife (low pressure air to blow solution off parts) ? Spray rinsing over process tank ? Minimize concentration of metal in plating bath ? Rack parts to maximize drainage ? Use drip bars to hold racked parts over plating tanks TOXICITY REDUCTION A number of waste minimization techniques reduce the concentration of contaminant in a liquid or solid waste stream, without necessarily diminishing the volume of wastes produced. It is often possible to lessen the toxic characteristics sufficiently so that the remaining waste is no longer considered a hazardous waste. Process Modification: Some specific examples of modifications that result in a less toxic waste stream include dry powder painting and solvent recovery methods. Treatment and Disposal Methods Stabilization and Solidification INTRODUCTION In general terms, stabilization is a process where additives are mixed with waste to minimize the rate of contaminant migration from the waste and to reduce the toxicity of the waste. Thus, stabilization may be described as a process by which contaminant are fully or partially bound by the addition of supporting media, binders, or other modifiers. Likewise, solidification is a process employing additives by which the physical nature of the waste (as measured by the engineering properties of strength, compressibility, and/or permeability) is altered during the process. Thus, objectives of stabilization and solidification would encompass both the reduction in waste toxicity and mobility as well as an improvement in the engineering properties of the stabilized mates al. Thermal Methods INTRODUCTION Incineration systems are designed to destroy only organic components of waste; however most hazardous waste is non-exclusive in its content and therefore will contain both combustible organics and non-combustible inorganics. By destroying the organ Erection and converting it to carbon dioxide and water vapor, incineration reduces the waste volume, and to the extent that the organic components include toxic component [emailprotected] threat to the environment. Hazardous wastes come in all physical forms: liquid, solid, and somewhere between. Commercial hazardous waste incineration systems have to handle the gamut of waste streams. Nevertheless, many hazardous waste incinerators a concerned only with liquid wastes. While gaseous waste streams are not regulated as hazardous waste, the combustion of such wastes is certainly a part of the overall incineration process. The theory and equipment design for each type of waste is similar but different, and their combination into a single system is often required. REMEDY SELECTION The parties having a stake in the selection of a remedy come from diverse interests representing the local community, industry, environmentalists, the scientific and engineering professions, and government. Their concerns differ as do their values. They inevitably will disagree about what is the best remedy and even as to what level of protection is needed. REMEDIAL ALTERNATIVES ANALYSIS 1. Site conditions can be very complicated. 2. Remediation is not straightforward but takes place usually over a long period of time and involves a number

The Iron Age - Social and Technological Advances

The Iron Age - Social and Technological Advances The European Iron Age (~800-51 BC) (see also the African Iron Age) is what archaeologists have called that period of time in Europe when the development of complex urban societies was spurred by intensive manufacturing of bronze and iron, and extensive trading in and out of the Mediterranean basin. At the time, Greece was flourishing, and the Greeks saw an explicit division between the cultured peoples of the Mediterranean, as compared to the barbaric northerners of central, western and northern Europe. Some scholars have argued that it was Mediterranean demand for exotic goodssalt, furs, amber, gold, slaves, foodstuffs, eventually iron weaponrythat drove the interaction  and led to the growth of an elite class in the hillforts of central Europe. Hillfortsfortified settlements located on the tops of hills above Europes major riversbecame numerous during the early Iron Age, and many of them do show the presence of Mediterranean goods. European Iron Age dates are traditionally set between the approximate period when iron became the principal tool-making material and the Roman conquests of the last century BC. Iron production was first established during the Late Bronze Age  but did not become widespread in central Europe until 800 BC, and in northern Europe by 600 BC. Chronology of the Iron Age 800-450 BC (Early Iron AgeHallstatt in central Europe, Jastorf in north central Europe) The early part of the Iron Age is called the Hallstatt culture, and it was during this time in central Europe that elite chiefs rose in power, perhaps as a direct result of their connections to the Mediterranean Iron Age of classical Greece and the Etruscans. Hallstatt chiefs built or rebuilt a handful of hillforts in eastern France and southern Germany, and maintained an elite lifestyle. Hallstatt sites: Heuneburg, Hohen Asberg, Wurzburg, Breisach, Vix, Hochdorf, Camp de Chassey, Mont Lassois, Magdalenska Gora, and Vace 450-50 BC (Late Iron Age, La Tà ¨ne) Between 450-400 BC, the Hallstatt elite system collapsed, and power shifted to a new set of people, under what was at first more egalitarian society. The La Tà ¨ne culture grew in power and wealth because of their location on important trade routes used by the Mediterranean Greeks and Romans to acquire status goods. References to Celts, conflated with Gauls and meaning central European barbarians, came from the Romans and Greeks; and the La Tà ¨ne material culture is broadly agreed to represent those groups. Eventually, population pressure within the populous La Tà ¨ne zones forced younger La Tà ¨ne warriors out, beginning the massive Celtic migrations. La Tà ¨ne populations moved southward into Greek and Roman areas, conducting extensive and successful raids, even into Rome itself, and eventually including most of the European continent. A new settlement system including central defended settlements called oppida were located in Bavaria and Bohemia. These were not princely residences, but instead residential, commercial, industrial and administrative centers that focused on trade and production for the Romans. La Tene sites: Manching, Grauberg, Kelhim, Singindunum, Stradonice, Zvist, Bibracte, Toulouse, Roquepertuse Lifestyles of the Iron Age By ca 800 BC, most of the people in northern and western Europe were in farming communities, including the essential grain crops of wheat, barley, rye, oats, lentils, peas, and beans. Domesticated cattle, sheep, goats and pigs were used by Iron Age people; different parts of Europe relied on different suites of animals and crops, and many places supplemented their diets with wild game and fish and nuts, berries and fruit. The first barley beer was produced. Villages were small, usually under a hundred people in residence, and the homes were built of wood with sunken floors and wattle and daub walls. It wasnt until near the end of the Iron Age that larger, town-like settlements began to appear. Most communities manufactured their own goods for trade or use, including pottery, beer, iron tools, weapons, and ornaments. Bronze was most popular for personal ornaments; wood, bone, antler, stone, textiles and leather were also used. Trade goods between communities included bronze, Baltic amber and glass objects, and grinding stones in places far from their sources. Social Change in the Iron Age By the late 6th century BC, construction had begun on fortresses on the tops of hills. Building within the Hallstatt hillforts was quite dense, with rectangular timber-framed buildings built close together. Below the hilltop (and outside the fortifications) lay extensive suburbs. Cemeteries had monumental mounds with exceptionally rich graves indicating social stratification. The collapse of the Hallstatt elites saw the rise of La Tà ¨ne egalitarians. Features associated with La Tene include inhumation burials and the disappearance of elite tumulus-style burials. Also indicated is a rise in the consumption of  millet  (Panicum miliaceum). The fourth century BC began the out-migration of small groups of warriors from the La Tà ¨ne heartland towards the Mediterranean Sea. These groups waged terrific raids against the inhabitants. One result was a discernible drop in the population at early La Tene sites. Beginning in the middle of the second century BC, connections with the Mediterranean Roman world steadily increased and appeared to stabilize. New settlements such as Feddersen Wierde became established as production centers for Roman military bases. Marking the traditional end of what archaeologists consider the Iron Age, Caesar conquered Gaul in 51 BC and within a century, Roman culture became established in central Europe. Sources Beck CW,  Greenlie  J, Diamond MP, Macchiarulo AM, Hannenberg AA, and Hauck MS. 1978.  The chemical identification of baltic amber at the Celtic oppidum Starà © Hradisko in Moravia.  Journal of Archaeological Science  5(4):343-354.Bujnal  J. 1991.  Approach to the study of the Late Hallstatt and Early La Tà ¨ne periods in eastern parts of Central Europe: results from  comparative  classification of Knickwandschale.  Antiquity  65:368-375.Cunliffe B. 2008. The Three Hundred Years that Changed the World: 800-500 BC. Chapter 9 in  Europe Between the Oceans. Themes and Variations: 9000 BC-AD 1000.  New Haven: Yale University Press. p, 270-316Hummler M. 2007.  Bridging the gap at La Tà ¨ne.  Antiquity   81:1067-1070.Le Huray JD, and Schutkowski H. 2005.  Diet and social status during the La Tà ¨ne period in Bohemia: Carbon and nitrogen stable isotope analysis of bone collagen from Kutn Hora-Karlov  and Radovesice.  Journal of Anthropological Archa eology  24(2):135-147.Loughton ME. 2009.  Getting smashed: the deposition of amphorae and the drinking of wine in Gaul during the late Iron Age.  Oxford Journal Of Archaeology  28(1):77-110. Marciniak A. 2008.  Europe,  Central  and Eastern.  In: Pearsall DM, editor.  Encyclopedia of Archaeology. New York: Academic Press. p 1199-1210.Wells PS. 2008.  Europe, Northern and Western: Iron Age.  In: Pearsall DM, editor.  Encyclopedia of Archaeology. London: Elsevier Inc. p 1230-1240.

Facts About Tylosaurus, a 35-Foot Cretaceous Predator

Facts About Tylosaurus, a 35-Foot Cretaceous Predator Name:  Tylosaurus (Greek for knob lizard); pronounced TIE-low-SORE-us Habitat:  Shallow Seas of North Ameria Historical Period:  Late Cretaceous (85-80 million years ago) Size and Weight: About 35 feet long and seven tons Diet:  Fish, turtles and other reptiles, including dinosaurs Distinguishing Characteristics: Long, sleek body; narrow, well-muscled jaws A Large and Vicious Predator The 35-foot-long, seven-ton Tylosaurus was about as well-adapted to terrorizing sea creatures as any marine reptile could be, considering its narrow, hydrodynamic body, blunt, its powerful head suited to ramming and stunning prey, its agile flippers, and the maneuverable fin on the end of its long tail. This late Cretaceous predator was one of the largest and most vicious of all the mosasaurs- the family of marine reptiles that succeeded the ichthyosaurs, pliosaurs, and plesiosaurs of the earlier Mesozoic Era, and that is distantly related to modern snakes and monitor lizards. Like one of those extinct plesiosaurs, Elasmosaurus, Tylosaurus figured in the famous 19th-century feud between the American paleontologists Othniel C. Marsh and Edward Drinker Cope (commonly known as the Bone Wars). Squabbling over a set of incomplete Tylosaurus fossils discovered in Kansas, Marsh suggested the name Rhinosaurus (nose lizard, a great missed opportunity if ever there was one), while Cope touted Rhamposaurus instead. When both Rhinosaurus and Rhamposaurus turned out to be preoccupied (that is, already assigned to an animal genus), Marsh finally erected Tylosaurus (knob lizard) in 1872. (In case youre wondering how Tylosaurus wound up in landlocked Kansas, of all places, thats because much of  the western U.S. was submerged beneath the Western Interior Sea during the late Cretaceous period.) Dazzling Discovery While Marsh and Cope squabbled endlessly, it was left to a third famous paleontologist, Charles Sternberg, to make the most dazzling Tylosaurus discovery of all. In 1918, Sternberg unearthed a Tylosaurus specimen harboring the fossilized remains of an unidentified plesiosaur, its last meal on earth. But thats not all: an unidentified hadrosaur (duck-billed dinosaur) discovered in Alaska in 1994 was found to harbor Tylosaurus-sized bite marks, though it seems that this dinosaur was scavenged by Tylosaurus after its death rather than plucked, crocodile-style, directly off the shoreline.

Sexual Abuse (Police Foundations Course) Essay Example | Topics and Well Written Essays - 500 words

Sexual Abuse (Police Foundations Course) - Essay Example Moreover, the taboos surrounding the sex act affect the investigation of offenses related to it. The victim is often blamed and treated insensitively with callous disregard for the outcome. Given the situation, it is imperative that the investigation be conducted with painstaking attention to detail, because failure to do so will allow the offenders to escape the justice they so richly deserve. The crime scene investigation is crucial as it is the foundation on which the case against the offender will be built. The crime scene must be secured and photographs should be taken before following the prescribed protocol for such situations. The next step is the collection of forensic evidence "which might provide a clue to the identity of the killer" (Geberth 440) . Such evidence may often be the only way to trace, implicate and convict the guilty party. Physical evidence from the scene such as fingerprints, stray hairs, fibers, used condoms, gloves, urine, feces, blood, and the like must be carefully gathered and preserved as they are the means by which the offender may be linked to the scene of the crime and the victim. The collection of these materials must be documented and photographed in order to avoid damage from exposure to the weather or careless handling. The next step is the thorough medical examination of the victim.

Pain management of central chest pain of patients in the Emergency Essay

Pain management of central chest pain of patients in the Emergency department - Essay Example This means these groups of patients need special support from the nursing professionals and measures to relieve these pains as soon as possible, at least in order to decrease these feelings. In order to be able to handle and manage these cases appropriately in the Emergency Department setting the nurses must be able to critically analyse the signs and symptoms of these patients on presentation. It is also expected that the nursing staff must be able to assess these patients in a structured manner in the least possible time frame since the risks associated with adult patients presenting with chest pain may be enormous. In some cases rapid and timely institution of interventions may impact the outcomes of care very favourably, while failure to stratify these risks and to appropriately assess these patients may lead to a defective and ineffective care plan leading to serious morbidity and mortality. In fact current research evidence suggests that nurses should be trained to acquire skil ls in appropriately assessing a patient and then reaching a provisional diagnosis that can be ruled out or supported by point of care protocols such as C-Troponin, CK-MB, and Pro-BNP so legitimate care may be instituted at the earliest. In this assignment, a problem-solving approach will be elicited in the context if emergency nursing care delivered to a group of patients with central chest pain during a recent placement of this writer, where nursing skills of assessment, planning, implementation, evaluation and documentation of care will be demonstrated (Hamer and McCallin, 2006). Moreover this account will also demonstrate how critical the nursing communication skill becomes in delivering an effective, standard, and competent care to these patients while working independently or through interprofessional collaboration. Throughout this assignment, there will be demonstration of the process of nursing diagnosis and management

Perspectives of Organisational Culture

Perspectives of Organisational Culture What is organizational culture all about? How did the concept arise? The idea on culture in organizations is a concept drawn from anthropology (Meek, 1988). Culture is viewed â€Å"asa system of shared symbols and meanings† (Rossi and OHiggins, 1980 cited in Lee an Yu, 2004 p. 340). Culture in organizations can simply be referred to as an organizations way of life or way of doing things. Organizational culture has been defined differently by several writers. However, most of the definitions in use lay emphases on key elements such as, norms, traditions, values, beliefs and assumptions. Organizational culture can be defined as â€Å"the collection of relatively uniform and enduring values, beliefs, customs, traditions and practices that are shared by an organizations members, learned by new recruits and transmitted from one generation of employees to the next† (Huczynski and Buchanan 2007, p.623). There is little doubt that organizational culture is a broad topic which no essay can discuss in entirety, however this essay will discuss the two approaches to the study of organizational culture and aim to critically evaluate the ways in which managers attempt to control organizational culture, drawing examples from the Hewlett Packard video watched in class and previous experience of visiting Tesco stores. History forms part of an organizations culture and it can be transmitted consciously and unconsciously over time from managers to employees. For example, it can be transmitted in the form of stories and myths (Meek 1998, Kaye 2007, Taylor S., Fisher D. et al). (Dandridge, T., Mitroff I. et al) suggest that â€Å"stories, myths and symbolism, aid understanding of the deep culture and structure of an organization†. These stories and myths in an organization might be about the start up of the organization or on the remarkable successes of its founders. For example, in the Hewlett Packard video, it indicated that the HP history formed part of the HP way as a vast number of the employees were aware of the fact that the â€Å"founders (Bill and Dave) started the company in a garage, in 1939. They developed the oscillator, used by Disney in the movie Fantasia. The bell ringing tradition was introduced by Bill and Daves wives as a signal for their husbands to observe lunch or coffee times† (The gilded cage: video watched 23 November, 2009). According to (Schein 1985 cited in Huczynski and Buchanan 2007, p.624 630) culture is considered to exist in three levels. Level one is regarded as ‘surface manifestations. At this stage, the culture of an organization is easily seen by outsiders in its symbols, language or architecture. In the Hewlett Packard case, the open plan office adopted, manifests, the relaxed environment the employees work in, and it also suggests the ease of access, between managers and employees. Tesco is very customer-centric and this is displayed by each employees approach to customers which, conveys a message regarding Tescos organizational culture of putting smiles on the faces of the shopping public, hence, creating a pleasant shopping experience for them. The second level of culture is ‘values. This has its firm foundation on morals, awareness and religious or societal precepts and is usually displayed on websites of organizations. The last level of culture is ‘basic assumptions. T hese are assumptions preconceived by an individual of an organization such as how it operates and functions in its environment. Several writers hold different views on organizational culture. The three perspective framework developed by (Martin, 1992), integration, differentiation and fragmentation perspectives provide understanding on organizational culture. The Integration or unitary perspective regards organizations as clear, consistent and unified, believing that these integrating features may result in improved organizational effectiveness. The differentiation perspective views organizations as consisting of subcultures with diverse interests and different objectives while the fragmentation or conflict perspective, sees organizations as being in a constant state of flux. The integration or managerial perspective appears to suggest that there is a relationship between strong culture and improved performance. (Scholz, 1987 cited in Huczynski and Buchanan, 2007, p.623) argues that culture generates competitive advantage. However, sustainable competitive advantage, â€Å"must be rare, adaptable and non-imit able† this determines the strong cultural traits the organization possesses (Barney, 1986 cited in Huczynski and Buchanan, 2007, p.641). Is organizational culture controllable? According to (Meek, 1998 p.455) previous studies suggest that culture belongs to management, hence, it is â€Å"available for management to manipulate†. The functionalist perspective holds that culture can be controlled, as it is regarded as something that the organization has and gives to new recruits and they do not take part in the formation, hence, it can be used as a control device by management (Smircich, 1983). However, the social constructionist perspective, rejects the notion, that culture may be controlled as it holds that culture exists through the continuous interaction between the organizations members. (Ackroyd and Cowley 1990, Harris and (Ogbonna 1999, Ogbonna 1993, Willmott 1993 cited in Huczynski and Buchanan, 2007). There exist three forms of corporate control, bureaucratic, humanistic and culture control. â€Å"More than other forms of control, however, culture control elicits sentiment and emotion,  and contains possibilities to ensnare workers in a hegemonic system† (Ray, 1986, p287). (Deal and Kennedy, 1982 cited in Ray, 1986 p.289) echoes that â€Å"it is the explicit challenge to management to make†¦ people . . . have a strongly ingrained sense of the companys values† Thus, aligning with the functionalist perspective which, supports that culture can be controlled, managers can thus, control culture, by ensuring that employees hold fast to the custom and practice of the organization. For example, in the HP video, meetings were held regularly to check the progress of team members and also to convey information to the employees as the need arises. Job security was tied to performance. Objectives setting was done â€Å"top-down, bottom-up† (objectives were set by management and accepted by each employee). The management by wondering around (MBWA) style was in force, as it enabled managers keep abreast with happenings in the company, and employees likewise had accessibility to managers to discuss issues.

Maiden Voyage Essay

The given passage taken from Denton Welch’s Maiden Voyage starts with a clear and concise statement that brings focus on mainly three details, the first being that the writer is a lively and independent foreigner or in other words, an extrovert, the second and third being that the time is morning and there are two more characters, Mr Butler and Mr Roote involved respectively. Mr Butler clearly warns the writer that ‘foreigners are not welcome here’ and he should preferably stay out of the locals’ way. This tells us that the Chinese prefer being isolated and like mixing amongst themselves. This statement is quite ironic because Mr Butler himself seems as if he is of English origin. No outgoing traveller would like hearing this and naturally the writer doesn’t like being confined between the four walls of the room when he could be doing several other outdoor activities. The writer also uses strong emotional language such as ‘hated’, ‘fiercely’ and ‘brooding’ to reinforce this. The symbolism of the ‘moth eaten ball and the old tennis racket’ informs the reader that hardly anyone uses the sports equipment. The incredibly rebellious writer vents outs his anger by striking these old worn out balls fiercely against the stable doors. It is this lack of excitement that leads the stubborn writer to trouble. He decides to take matters to his own hands and foolishly escapes out in the country side. Whilst this escape from drudgery is happening, Mr Butler and Mr Roote are so deeply engrossed in their own conversation that they fail to realize that the writer is running away. To the reader, this clearly suggests that they are content not to look outside their own world and have not moved on from this morning’s conversation whereas the writer on the other hand has. The writer uses mysterious and exotic language to describe the country. The still silence, the hot sand, the ‘stunted bushes’ left the writer overwhelmed maybe because he was used to an entirely different landscape. The grass is tall, tall enough for a person to hide and was also described as ‘rank’ maybe because it had a stench to it and also, the fact that it was as ‘sharp as knives’ made it even more hard as well as dangerous to walk on. ‘The soles of my shoes began to burn’ suggests that temperatures were high, high enough to leave the writer dehydrated and exhausted. The reader is left behind with an image similar to that of that of a dream, a hot dream.