Removal of TBP From Aqueous Phase

Removal of TBP From Aqueous Phase ABSTRACT PUREX process involves the use of 30% TBP in Dodecane to extract the fissile materials. However, due to mutual solubility some amount of TBP gets transferred into the aqueous phase. This transferred TBP leads to many environmental problems. Removal of this TBP from aqueous phase is of prime concern which can be done by contacting it with an organic diluent. UNIFAC and Uniquac methods have been used to describe Liquid Liquid equilibrium (LLE) in TBP-Diluent-HNO3 system. Uniquac and UNIFAC Group interaction parameters have been founded to fit the experimental data. Various metal nitrates are also present in the organic phase. These metal nitrates affect the solubility of TBP in aqueous phase. Metal nitrates like Sodium and Calcium nitrate have also been incorporated in model to find out interaction parameters in the presence of metal nitrates like Sodium and Calcium. The obtained parameters will be useful in predicting LLE for the above system and will aid in safe disposal of nuclear w aste. INTRODUCTION Reprocessing of the used nuclear fuel has always been carried out to reduce the volume of high level radioactive waste and also for their safe disposal. The plutonium uranium extraction (PUREX) process is widely used for reprocessing. This process uses 30% Tri-n-butyl phosphate (TBP) in an inert paraffinic diluent for the separation of uranium and plutonium from the aqueous phase containing nitric acid. Mutual solubility of aqueous and the organic phase leads to the transfer of certain finite amount of TBP in aqueous phase. This transferred TBP decomposes very slowly in the presence of water and nitric acid by hydrolysis to lower organo-phosphate acids at normal operating temperatures leading to many environmental problems. Removal of such dissolved TBP is of direct interest in reprocessing processes as this would enable manifold evaporation of aqueous stream without harming the environment. Various metal elements are also present in the highly radioactive liquid waste solution in ni trate form. The salting out of TBP takes place in the presence of these inorganic nitrates in the aqueous phase. Studies in the presence of various metal nitrates will aid in efficient removal of TBP from aqueous phase. In order to predict the extent to which TBP could be removed from aqueous phase, a model must be developed to predict the phase behaviour. Such models can be used for designing remediation projects. Estimation of activity coefficients of the mixtures is important for predicting the phase behaviour In order to predict the extent of mass transfer, chemical compositions of the two-phase system at equilibrium needs be predicted first. Investigators have used various models to predict the LLE. Cheng et al. have calculated the thermodynamic equilibrium constant for the system HNO3-TBP-n-C7H16.The activity coefficient of nitric acid was calculated using Pitzer’s equation and those of the components in organic phase was derived from experimental data. Ding et al. have calculated the activity coefficient for 20 binary and 7 ternary systems composed of nC6H14, nC7H16, nC8H18, C6H6, cy-C6H6, CCl4, CHCl3, (C4H9)3PO4 and UO2(NO3)2.2((C4H9)3PO4) using head-space gas chromatography. The results are compared with Scatchard-Hilderbald, NRTL and UNIQUAC models. Li et al. has calculated the Vapor-Liquid and Vapor-Liquid-Liquid equilibria of 19 tributyl phosphate systems. Aqueous phase activity coefficients are calculated using Pitzer’s equation. UNIFAC method is used for correlating and predicting the data in organic phase. All the above authors have done work on the systems in the absence of metal nitrates. Intera ction parameters for systems in the presence of metal nitrates have not been reported yet. The objective of the present work to find the UNIFAC and Uniquac group interaction parameters regressed for the experimental data for three systems. These systems comprise of TBP-diluent-HNO3, TBP-diluent-HNO3-NaNO3, TBP-diluent-HNO3-Ca(NO3)2. These parameters will aid in predicting the equilibrium and calculating the number of stages for designing the equipment to remove dissolved TBP. LIQUID LIQUID EXTRACTION EQUILIBRIA The organic phase consists of (1) diluent (NPH), (2) TBP, (3) TBP.HNO3 The dissolution of TBP in NPH and HNO3 can be represented by eq 1and eq 2. xTBPorg (TBP)x org(1) TBPorg + H+aq + NO3-aq HNO3.TBPorg (2) where the subscripts aq and org denote the species in the aqueous and organic phase. The thermodynamic equilibrium constant for reaction (2) can be calculated as a HNO3.TBP(org) a 3 (3) K == a H+(aq) a NO3-(aq) a TBP(org)a2 ±HNO3 a 2 x3 ÃŽ ³3 K = (4) m ±2 ÃŽ ³Ã‚ ±2 x2 ÃŽ ³2 where a is the thermodynamic activity, x is the mole fraction of the component in the organic phase and ÃŽ ³ is the corresponding activity coefficient. m ± is the mean molality concentration of electrolyte in the aqueous phase and ÃŽ ³Ã‚ ± is the mean ionic activity coefficient of corresponding electrolytes. Similar procedure as described by Chen et al has been used to predict the LLE with one extraction reaction. Mean ionic activity coefficient of electrolytes Pitzer equation is used to calculate the mean ionic coefficient of HNO3 in all the cases and of Ca(NO3)2, NaNO3 in the presence of metal nitrates. lnÃŽ ³Ã‚ ± = Aà Ã‚ ¤+ m (5) where b=1.2, ÃŽ ±=2, AÉ ¸ = 0.391. I is the ionic strength of solution. The Pitzer parameters for HNO3, NaNO3 and Ca(NO3)2 are listed in Table 1. Activity Coefficients of components in organic phase can be estimated using UNIFAC and Uniquac equation. UNIFAC EQUATION In a multi-component mixture, the UNIFAC equation for the activity coefficient of component i is given by Equation 3.1. ln ÃŽ ³i = ln ÃŽ ³iC +ln ÃŽ ³iR (6) The combinatorial part of the UNIFAC model considers the shape and the size of the molecules in the mixture. ln ÃŽ ³iC = 1 – Ji + ln Ji – 5qi( ln (É ¸i /ÃŽËœi )+ 1 – (É ¸i /ÃŽËœi ) ) (7) where, Ji = ( É ¸i /xi) The molecule volume fraction É ¸i , and the molecule surface area fraction ÃŽËœi , are given by respectively, É ¸i = xi*ri/∑j xj*rj and ÃŽËœi = xi*qi/∑j xj*qj (8) In Equations (3.3), relative molecular volume rs, and relative molecule surface area q, are given by ri = ∑k ÃŽ ½k(i)* Rk and qi = ∑k ÃŽ ½k(i)* Qk (9) The quantity vk is the number of subgroups of type k in a molecule of species i. ri is the relative molecular volume and qi is the relative molecular surface area. Group parameters Rk and Qk are reported by Fredenslund et al. The residual part of the activity coefficient is given by Equation 10. ln ÃŽ ³iR = ∑k ÃŽ ½k(i )[ ln à Ã¢â‚¬Å"k – ln à Ã¢â‚¬Å"k(i) ] (10) where, k denotes each group in the mixture ÃŽ ½k(i ) is the number of groups of type k in molecule i à Ã¢â‚¬Å"k is the group residual activity coefficient à Ã¢â‚¬Å"k(i) is the residual activity coefficient of group k in a reference solution containing only molecules of type i. The group residual activity coefficient is found by Equation 11. ln à Ã¢â‚¬Å"k = Qk [ 1- ln(∑m ÃŽËœm ψmk) ∑m (ÃŽËœm ψkm /∑n ÃŽËœn ψnm ) ] (11) where, Qk is a group surface area parameter ÃŽËœm is the area fraction of group m ψmn is the group energy of interaction parameter ψmn = exp(-amn + bmn/T) (12) Where, amn and bmn is the group-interaction parameter. T is the temperature Group assignment as proposed by Chen et al. has been followed. C7H16, TBP and TBP.HNO3 has been broken down into groups CH3, CH2, (CH2O)3PO, HNO3.(CH2O)3PO. Group volume and surface parameters for above groups have been reported by Cheng et al. The UNIQUAC model thus consists of two terms: a combinatorial or entropic term, a residual or enthalpic term. The combinatorial and the residual terms are identical to the terms used in the traditional UNIQUAC equation. The combinatorial, entropic term is ln ÃŽ ³iC = ln(É ¸i/xi) +1 (É ¸i/xi) – (z/2)*qi [ ln(É ¸i/ÃŽËœi) + 1- (É ¸i/ÃŽËœi) ] (13) z = 10 is the co-ordination number. xi is the mole fraction, É ¸i is the volume fraction, ÃŽËœi and is the surface area fraction of component i. É ¸i = xi*ri/∑j xj*rj and ÃŽËœi = xi*qi/∑j xj*qj (14) ri and qi are volume and surface area parameters for component i. The residual, enthalpic term is ln ÃŽ ³iR = qi [ 1 – ln( ∑k ÃŽËœkψki) ∑k ÃŽËœkψik/(∑l ÃŽËœlψlk) (15) The parameter ψki is given by ψki = exp(-uki-uii/T) (16) uki and uii are interaction energy parameters. Uniquac r and q parameters for C7H16, TBP and TBP.HNO3 have been reported by Li et al. RESULTS AND DISCUSSION EQUILIBRIUM PREDICTION. The following equations can be used to predict equilibrium x1 + x2 + x3 = 1 (17) x20 = (x2 + x3)/( x1 + x2 + x3) (18) x3 ÃŽ ³3 K = (19) m ±2 ÃŽ ³Ã‚ ±2 x2 ÃŽ ³2 ÃŽ ³2 and ÃŽ ³3 values have been calculated using UNIFAC and Uniquac equation. Knowing equilibrium constant K, m ± calculated mole fractions can be found out., The group interaction parameters are regressed by Least Square Technique to minimize the error between experimental and calculated mole fraction values. The obtained regressed group interaction values in the absence of metal nitrates, in the presence of NaNO3 and Ca(NO3)2 using Uniquac and UNIFAC have been listed in Table. The standard absolute deviation of components in the organic phase is listed in table. The experimental and calculated values of mole fractions have been reported graphically in fig CONCLUSION The experimental mole fraction data were correlated using UNIFAC and Uniquac model. The Uniquac and UNIFAC group interaction parameters are capable of predicting mole fraction for TBP-Diluent-HNO3 in the absence and presence of metal nitrates. Thus these can be effectively used to predict the equilibrium for the removal of dissolved TBP in Nuclear engineering. UNIFAC gives a better prediction as compared to Uniquac in all the cases LIST OF TABLES Pitzer parameters for calculation of mean ionic activity coefficient Uniquac Group interaction parameters in the absence of metal nitrates Unifac Group interaction parameters in the absence of metal nitrates Uniquac Group interaction parameters in the presence of Sodium metal nitrate Unifac Group interaction parameters in the presence of sodium nitrate Uniquac Group interaction parameters in the presence of calcium metal nitrate Unifac Group interaction parameters in the presence of calcium nitrate Standard absolute deviations between predicted and experimental mole fraction of extracted complexes Table 1. Pitzer parameters for calculation of mean ionic activity coefficient Components ÃŽ ²o ÃŽ ²o HNO3 0.1119 0.3206 0.001 NaNO3 0.0068 0.1783 -0.0007 Ca(NO3) 0.2108 1.409 -0.02014 Table 2. Uniquac Group interaction parameters in the absence of metal nitrates a (m,n) NPH TBP HNO3.TBP NPH 0 2.05741 0.679624 TBP -3.04549 0 -1.1645 HNO3.TBP -1.03328 1.143979 0 b (m,n) NPH TBP HNO3.TBP NPH 0 1.007842 0.999125 TBP 0.983532 0 1.095824 HNO3.TBP 0.993173 1.019649 0 Table 3. Unifac Group interaction parameters in the absence of metal nitrates a (m,n) CH2 CH3 (CH2O)3PO HNO3(CH2O)3PO CH2 0 0 2.56180892 -48.1996 CH3 0 0 2.56180892 -48.1996 (CH2O)3PO -5.15816 -5.15816 0 -6.13375 HNO3(CH2O)3PO -2.57271 -2.57271 34.781685 0 b (m,n) CH2 CH3 (CH2O)3PO HNO3(CH2O)3PO CH2 0 0 0.997309 1.126187 CH3 0 0 0.997309 1.126187 (CH2O)3PO 1.016819 1.016819 0 1.131422 HNO3(CH2O)3PO 1.015345 1.015345 0.890301 0 Table 4. Uniquac Group interaction parameters in the presence of Sodium metal nitrate a (m,n) NPH TBP HNO3.TBP NPH 0 -1.82623 6.863001 TBP 0.87821 0 0.552002 HNO3.TBP 1.380676 2.272663 0 b (m,n) NPH TBP HNO3.TBP NPH 0 0.990771 1.019671 TBP 0.999592 0 0.998537 HNO3.TBP 1.001281 1.004269 0 Table 5. Unifac Group interaction parameters in the presence of sodium nitrate a (m,n) CH2 CH3 (CH2O)3PO HNO3(CH2O)3PO CH2 0 0 0.742770 -0.6378 CH3 0 0 0.742770 -0.6378 (CH2O)3PO 1.096426 1.096426 0 -0.373895 HNO3(CH2O)3PO 0.748111 0.748111 -0.20966206 0 b (m,n) CH2 CH3 (CH2O)3PO HNO3(CH2O)3PO CH2 0 0 1.000835 1.005434 CH3 0 0 1.000833 1.005434 (CH2O)3PO 0.99968 0.999688 0 1.004477 HNO3(CH2O)3PO 1.000817 1.000818 1.003927 0 Table 6. Uniquac Group interaction parameters in the presence of Calcium metal nitrate a (m,n) NPH TBP HNO3.TBP NPH 0 0.3249 -0.4026 TBP 0.95221 0 -1.40706 HNO3.TBP 1.168545 1.39797 0 b (m,n) NPH TBP HNO3.TBP NPH 0 0.997878 0.99529 TBP 0.999836 0 0.99200 HNO3.TBP 1.00058 1.000138 0 Table 7. Unifac Group interaction parameters in the presence of calcium nitrate a (m,n) CH2 CH3 (CH2O)3PO HNO3(CH2O)3PO CH2 0 0 5.9429 2.14979 CH3 0 0 5.9429 2.14979 (CH2O)3PO 2.6932 2.6932 0 -2.59369 HNO3(CH2O)3PO 3.8889 3.8889 3.8740 0 b (m,n) CH2 CH3 (CH2O)3PO HNO3(CH2O)3PO CH2 0 0 0.9839 0.99622 CH3 0 0 0.9839 0.99622 (CH2O)3PO 0.99447 0.99447 0 1.011186 HNO3(CH2O)3PO 0.990612 0.990612 0.990633 0 Table 8. Standard absolute deviations between predicted and experimental mole fraction of extracted complexes. System Δ x (Uniquac) Δ x (Unifac) HNO3/TBP/Diluent 0.016 0.0051 HNO3/TBP/Diluent/NaNO3 0.0435 0.0429 HNO3/TBP/Diluent/Ca(NO3)2 0.015 0.0051

The Bereavement Journey :: essays research papers

The Bereavement Journey Breavement is handeled differently in different generations. Weather it is a kid that has a terminal illness or an elderly person who is diagnosed with a terminal illness, each breave differently. Breavement deals with not just someone clsoe dying but, someone themselvs who is diagnosed with a life threatening illness. Kids are more afair of death than adults are. Kids do not underdstand death like adults. In one of our class discussions , Dr. Bradshaw told our class a story about how he went to Yale New Haven hospital (I think) and Dr. Bradshaw stated that a young boy who was a terminal cancer patient drew him a picture of a tank going after him. When Dr. Bradshaw told our class this , it was then clear to me that a child does not understand death as well as adults. But there are also ways a parent can help a child with breavement like buying the child a pet and when that pet dies, explain to the kid whay the pet died and that it can not be replaced. â€Å"childeren are capeable of experiencing greif† (DeSpilder 359). Childeren tend to be more quiet when dealing with a death of someone close. Childeren like to forget the sight of a dead one and try and move on without talking to anyone. Adults experience greif more open. When a certain person reaches adult hood , more and more people that he or she knows is going to die, a parent can die, a friend, and even a child. The most extemem death a parent can experience is death of a child. â€Å" the death of a child may be experienced as the ultimate lack of protection and nuture, the ultimate breakdown and failure in being a â€Å"good parent†Ã¢â‚¬ . When and adult experiences a deah he or she will be more open and go to counceling or actually talk to someone, and talking to somneone about your problems is a good way of breavement. Elderly when dealing with deaht and breavement is also an extreme. An elderly is close to death as is, but his or her friends are starting to die repidly and most of all a spouse is very close to end of life.

Information Seeking Behaviour of Primary School Teachers in Nigeria

TOPIC: THE INFORMATION NEEDS, SOURCES AND SEEKING BEHAVIOUR OF TEACHERS IN NIGERIA PRIMARY SCHOOLS IN IBADAN. PROBLEM STATEMENT: Every human needs information to solve a given problem and make decisions. There have been studies that have been focusing on the behavioural patterns of information seeking of humans, organisations and systems, but majority of these studies have been mainly on the information seeking behaviour of higher education stakeholders, industrial, economic and social societies.Studies have not been carried out on the educational grassroots (primary education). This study would focus on the patterns of information seeking behaviour of primary school teachers. PURPOSE: The purpose of this study is to explore the patterns in the information-seeking behaviour of teachers in primary schools in Ibadan metropolis. An in-depth analysis of what kind of information sources are used to cater for the growing needs a teacher, the channels used in conveying these sources and the teacher motivation factor.It is hoped that this study will lead to a better understanding of the information needs of teachers in primary education. OBJECTIVES: This study strives to assess the information needs and information seeking behaviour of teachers in primary schools in Ibadan metropolis. The objectives of this study are: a. To identify the information needs of teachers in primary schools their perceptual feelings that arise from these needs. b. To examine the selected attributes of information that primary school teacher’s value in their selection of information sources and content. . To identify the media/channels used to access their information. d. To identify the challenges in meeting their information needs. e. To examine teachers evaluation of selected information sources. RESEARCH QUESTIONS: a. What are the main sources used by primary school teachers to meet their information needs? b. What are the major barriers in meeting their information needs? c. Do te achers get all the information required from the required sources? d. Are these sources of information sourced for within or outside the schooling environment? . What is the level of awareness, accessibility, availability and satisfaction teachers gain when using this information sources? f. What are the relationships between their information needs and selected demographic fact? SCOPE AND LIMITATIONS: This study would be conducted with the awareness that certain limitations would be present during the design and the instruments used: This study would only be focused on the information needs and seeking behaviour of public primary school teachers in LAGELU local government area of Ibadan Oyo state.

Puritans Views On Sex And Morality Essay

What were the Puritans views on sex and morality? How do they compare to American values of today? Puritan is described as one who lives in accordance with Protestant precepts, especially one who regards pleasure or luxury as sinful. It is said that a widely known Puritan by the name of John Calvin (1509-1564) was cheerless and had a viciously malevolent theology based on total human depravity and the implacable wrath of God. An unhappy and unhealthy ascetic, he had ulcers, tuberculosis, and migraine headaches and considered life of little value and God as a harsh tyrant. Calvin set up a brutal political theocracy. No dancing, fancy clothes, and jewelry were allowed. He was in favor of death penalty for adultery. Even legitimate love was stringently regulated. Solemn weddings with no revelry were the beliefs that he preached to others. The Calvin marriage had two functions: (1) to produce offspring (2) to eliminate incontinence. Another Puritan believer who was famous during his times was John Knox . He had Blue Laws of the 1650s, and was against Sunday amusements, smoking, drinking, gambling, fancy clothing. He also promoted public whippings, scarlet letters, execution for adulterers, and the Salem â€Å"witch† executions. Stern puritan traits were often only expressions that masked moods of mischief and romance. Sex outside of marriage was attacked. Puritans greatly enjoyed sex inside marriage and propagated the concept of the virtue of virginity. 16th Century Puritans tried to combine the ideals of love with the normality of sex into marriage. They also valued money more than leisure, and success more than culture. After the 17th century. the Puritans as a political entity largely disappeared, but Puritan attitudes and ethics continued to exert an influence on American society. They made a virtue of qualities that made for economic success—self-reliance, frugality, industry, and energy—and through them influenced modern social and economic life. For the Puritans, a person by nature was wholly sinful and could achieve good only by severe and unremitting discipline. Hard work was considered a religious duty and emphasis was laid on constant self-examination and self-discipline. Profanation of the Sabbath day, blasphemy, fornication, drunkenness, playing games of chance, and participation in theatrical performances were penal offenses. It was the notion that Puritans were strict, formal, quick to judge and always on the lookout for anything mischievous. Anything too ostentatious, pretentious or blatant was immediately a source of discipline for the Puritans. On this note, before making a comparison between the two, we must first ask, what is morality? Morality is concerned with the distinction between good and evil or right and wrong. It is the perceived guidelines of a standard of how we live our life, how we act, how we think about things and the protocol of how things work around us.   This first example of immorality may be considered by many as one that does not have anything to do with morality, but if you give it more then cursory thought, you would most likely consider it a morality issue. Luxury things are one of the most prevalent consumer items nowadays. In fact, many major industries stem from this market/ business. If you think deeply about it, WHY do consumers buy luxury items when there are existing items that could as well be the same quality and kind? Luxury items promote the notion that those who belong to a certain class or earning bracket are those who can afford such goods. They promote a certain image of the luxury item purchaser, that they are a â€Å"higher-class† or that they belong to a higher level of social status. This in itself could be seen as condescending. In comparison to the Puritans, indulgence in wordly things are considered â€Å"evil† and unright. Today’s times propagate consumerism, luxury, indulgence, opulence. Whereas, for the Puritans, all these were wrong values as they believed in simplicity. Albert Einstein once said † The value of a man resides in what he gives and not in what he is capable of receiving.† But with the morality and values of America today, it seems, that people are more concerned about what they can receive or benefit over that which they can give. And this is contrary to what Puritans believe in. With regards to sex, Puritans strongly believed in the sanctity of marriage. They believed that sex was only to be enjoyed if it was inside marriage. They valued virginity and upheld rigid values concerning physical intimateness outside of marriage. As compared to a majority of Americans, it seems that in today’s world, they are more open to sexual relations outside of marriage. Many Americans do not believe in preserving their virginity for marriage. This is stark contrast to what Puritans believed in. Perhaps even in relationships, Puritans only believed in relationships with a purpose-one that was heading towards marriage. Where as young people, Generation X,Y,Z and baby boomers do not seem to always have marriage in mind when dating a prospect. This only skims the surface of a myriad of values on sex and morality that separates modern-day Americans from Puritans but this shows the positives and negatives about two very different perspectives and what positive points we can pick up from each aspect. Works Cited McMahon, Dr. C. Matthew. â€Å"Puritan Roots: A Brief Sketch of the Values of Puritanism†. E. C. Hill. Society and Puritanism in Pre-Revolutionary England (2d ed. 1967).

Free Essays on The Safety and Health Manager and Function

THE SAFETY AND HEALTH MANAGER AND FUNCTION; HAZARD AVOIDANCE Regardless of the occupation an individual chooses, safety and health will always be a concern. The severity of the concern is dictated by the danger entailed within a particular occupation. Whether the danger is small or large, measures to protect the worker need to be put into place, and practiced. Responsibility for personal safety cannot be solely placed on the individual. The safety and health manager is needed to help facilitate worker protection from hazards. Of course the main objective is to keep individuals in the workplace safe as well as healthy, but there are also regulations that must be followed; regulations that were put into place with a goal of protecting the worker. The safety and health manager also has an important role in ensuring these regulations are enforced and upheld. Of course each firm has unique programs to deal with safety and health issue. This paper will discuss the various aspects of safety and health within the Rockford Illinois attachment of Cadbu ry Adams; from an interview conducted with Ms. Robin Sullivan, the Safety Manager. Cadbury Adams, which is a U.S. subsidiary of a British company Cadbury Schweppes (Hoovers Online, 2004) and is a confectionary manufacturer. The Rockford based detachment of Cadbury Adams produces products such as chewing gum, gum base, as well as encapsulated sweeteners. They are commonly known for the productions of such products as Bubblicious, Dentyne, Chicklets and Halls cough drops. The Cadbury Adams firm employs about 850 personnel, 200 of which are employed through a temporary service (R. Sullivan, personal communication, August 20, 2004). The average worker’s workweek for this firm is a 5-day a week 40 hours per day schedule, but with the current production demands, many departments have a 6 to 7 day workweek (R. Sullivan, personal communication, August 20, 2004). With 850 employees engaged in a nume... Free Essays on The Safety and Health Manager and Function Free Essays on The Safety and Health Manager and Function THE SAFETY AND HEALTH MANAGER AND FUNCTION; HAZARD AVOIDANCE Regardless of the occupation an individual chooses, safety and health will always be a concern. The severity of the concern is dictated by the danger entailed within a particular occupation. Whether the danger is small or large, measures to protect the worker need to be put into place, and practiced. Responsibility for personal safety cannot be solely placed on the individual. The safety and health manager is needed to help facilitate worker protection from hazards. Of course the main objective is to keep individuals in the workplace safe as well as healthy, but there are also regulations that must be followed; regulations that were put into place with a goal of protecting the worker. The safety and health manager also has an important role in ensuring these regulations are enforced and upheld. Of course each firm has unique programs to deal with safety and health issue. This paper will discuss the various aspects of safety and health within the Rockford Illinois attachment of Cadbu ry Adams; from an interview conducted with Ms. Robin Sullivan, the Safety Manager. Cadbury Adams, which is a U.S. subsidiary of a British company Cadbury Schweppes (Hoovers Online, 2004) and is a confectionary manufacturer. The Rockford based detachment of Cadbury Adams produces products such as chewing gum, gum base, as well as encapsulated sweeteners. They are commonly known for the productions of such products as Bubblicious, Dentyne, Chicklets and Halls cough drops. The Cadbury Adams firm employs about 850 personnel, 200 of which are employed through a temporary service (R. Sullivan, personal communication, August 20, 2004). The average worker’s workweek for this firm is a 5-day a week 40 hours per day schedule, but with the current production demands, many departments have a 6 to 7 day workweek (R. Sullivan, personal communication, August 20, 2004). With 850 employees engaged in a nume...

Customer Request Listening Quiz

Customer Request Listening Quiz You will hear a customer asking for help in a shop. Write down the answers to the questions concerning what she wants. Click on the listen here link. Once you have listened twice, return to this page and take the listening quiz. Write or type the answers. After you have finished, find the answer key at the bottom of the page to see if you have answered the questions correctly. Listen here.   What did the woman receive as a gift?What kind of gift was it?Why does she not want it?Why cant she get her money back?What can she do with it?What would she like?What kid of handbag would she like?What kind of handbag was she looking for?Where is the handbag that she likes?What is the problem with the handbag she likes?What can she have instead of a refund?Who would she like to speak to?What does the man think the manager will say?Where has the manager been? Answer Key: A briefcaseA birthday giftShe doesnt like it and she already has one.She doesnt have a receipt.She can exchange the briefcase.A handbagSomething black, smallish, and not too expensiveSomething more classicalIn the windowIt costs less than the briefcaseA credit noteThe ManagerHe will say the same thing.At lunch

Explicación sencilla del sistema educativo en EE.UU.

Explicacià ³n sencilla del sistema educativo en EE.UU. Para los recià ©n llegados a Estados Unidos, el sistema educativo es uno de los grandes misterios y uno de los temas que ms inquietudes plantea. Para navegarlo exitosamente es importante entender los puntos bsicos de la educacià ³n obligatoria. En este artà ­culo se resuelven dudas sobre quà © aà ±os comprende la educacià ³n obligatoria, tipos de escuelas, cules son los grados y, finalmente, temas especiales como estatus migratorio y escuelas pà ºblicas, alimentos, educacià ³n especial, etc. Aà ±os de educacià ³n obligatoria en EE.UU.: K-12 En Estados Unidos la educacià ³n es obligatoria entre los grados K-12, esto quiere decir, entre kindergarten -preescolar- al grado 12. Lo que no es tan claro es a quà © edad se debe comenzar en kindergarten y a cul finalizar los estudios obligatorios ya que cada estado establece sus propias reglas. Pero en general puede decirse que en algà ºn punto entre los 5 y los 8 aà ±os los nià ±os deben escolarizarse y deben estudiar hasta los 16 o, en algunos estados, 18-19 aà ±os. Por ejemplo, en California es obligatoria la enseà ±anza entre las edades de 6 y 18 aà ±os, pero se permite dejar de estudiar a los 16 si el estudiante se ha graduado de high school o ha obtenido el tà ­tulo equivalente que se conoce como CHSPE y, adems, tiene el permiso de sus padres. Por otro lado, en Connecticut la educacià ³n es obligatoria entre los 5 y los 18 aà ±os, permitiendo la ley multas y cargos delictivos contra los padres que no envà ­an a sus hijos a las escuelas.  ¿Dà ³nde deben escolarizarse los nià ±os? Estados Unidos brinda un amplio abanico de posibilidades para enviar a las escuelas a nià ±os, desde escuelas pà ºblicas y todas sus variedades o privadas y todas las diferentes opciones, pasando por educacià ³n en casa. Segà ºn el Centro Nacional de Estadà ­sticas para la Educacià ³n, 50.700.000 estudiantes estudian en escuelas pà ºblicas, es decir, la mayorà ­a de los pupilos en edad de estudios obligatorios. Las escuelas pà ºblicas se caracterizan por: ser gratuitas para los estudianteslos fondos provienen del gobierno federal, el estado, el condado, la municipalidad o una combinacià ³n de variosestn obligadas a admitir a los estudiantes que habitualmente residen en el distrito escolar En algunos estados se permite que los padres puedan elegir escuela. Tambià ©n es frecuente que se permitan alternativas a los padres cuando la calidad de las escuelas del lugar donde residen deja mucho que desear en cuanto a calidad, mediante el sistema que se conoce como voucher. Existen varios tipos de escuelas pà ºblicas. En primer lugar, estn las regulares. Algunas son excelentes. Adems de las regulares, estn las chapter, que son escuelas que funcionan con fondos pà ºblicos pero que son gestionadas privadamente por empresas, por cooperativas de maestros o, incluso, por padres o por comunidades. Existe una importante diferencia en calidad de la enseà ±anza entre distintas escuelas chapters, por lo que si esa es la opcià ³n de los padres es muy conveniente que investiguen antes de registrar a sus hijos. Adems, estn las escuelas pà ºblicas conocidas como magnet, que son escuelas pà ºblicas que destacan por su excelencia acadà ©mica. Se especializan en un rea acadà ©mica en particular. Las magnet se caracterizan por asegurar la diversidad à ©tnica y racial de sus estudiantes.  En esta base de datos se puede ver cules son las mejor calificadas en todo Estados Unidos, permitià ©ndose una bà ºsqueda por estados. Por otro lado, tambià ©n existen varios tipos de escuelas privadas en las que en la actualidad estudian poco menos de 6 millones de alumnos.  En este tipo de escuelas los estudiantes envà ­an una solicitud y deben esperar a ver si son admitidos. Asimismo, deben pagar por sus estudios, aunque hay casos en los que hay becas disponibles para los mejores estudiantes sin recursos econà ³micos. En Estados Unidos, donde 1 de cada 3 high schools son privadas, existen los siguientes tipos de escuelas de esta naturaleza: En primer lugar, estn las Escuelas independientes, que no pueden recibir fondos de grupos religiosos, aunque pueden tener una estrecha relacià ³n con ellos. Hay menos de 2,000 pero se encuentran dentro de esta categorà ­a las famosas  Phillips Academy  Andover, con un excelente sistema de becas para  estudiantes excelentes pero sin recursos,  y Exeter. En segundo lugar, hay escuelas parroquiales, que estn estrechamente vinculadas con una iglesia y son muy populares, conformando el mayor nà ºmero de escuelas privadas. En los Estados Unidos la mayorà ­a son catà ³licas, aunque tambià ©n las hay protestantes y judà ­as. Un aspecto a tener en cuenta es que son, en general, notablemente ms baratas que las escuelas independientes. En tercer lugar, destacar las escuelas privadas con fin de lucro, que se conocen en inglà ©s como proprietary schools.   Por à ºltimo, existe una alternativa a las escuelas pà ºblicas y a las privadas: la escolaridad en casa y es que en los Estados Unidos ms de un millà ³n y medio de estudiantes reciben la educacià ³n en sus casas, lo que se conoce como home schooling,  actuando como profesores sus padres, maestros-tutores contratados o, incluso, siguiendo cursos completos por internet. Los requerimientos en cuanto a la obligacià ³n de notificar esta opcià ³n de enseà ±anza, rendir exmenes o curriculum a seguir varà ­a enormemente entre los diferentes estados, por lo que es necesario informarse en profundidad de las reglas que rigen en el lugar de residencia habitual.    ¿Cà ³mo se dividen las escuelas por grados? Es muy comà ºn encontrar estos tipos de escuelas: En primer lugar, Primaria, conocida en inglà ©s como elementary school. Los muchachos estudian hasta los grados 5to o 6to, dependiendo de los distritos. Como regla general, hasta que tienen 11-12 aà ±os. En segundo lugar, Intermediaria, conocida en inglà ©s como middle school y tambià ©n como junior high. No existe en todos los distritos y donde sà ­ la hay, hay variacià ³n en los grados que la componen, siendo comà ºn que comprenda 4to, 5to y 6to grado. Se trata de un paso intermedio entre la primaria y la secundaria. En tercer lugar, Secundaria, conocida en inglà ©s como high school. comprende los grados 9 a 12 y comienza a la edad de 14-15 aà ±os. Hay una gran variedad de tipos de high school, como las especializadas en preparar para college y universidad, especiales, vocacionales  o alternativas. Las personas que alcanzan los 19 aà ±os de edad y no han obtenido el diploma de high school pueden sacar una certificacià ³n alternativa. La ms conocida es el GED, que tambià ©n se puede rendir en espaà ±ol. Pero hay otras opciones, dependiendo de los estados, como por ejemplo el TASC y el HiSET. Adems, en el caso de los mexicanos es posible obtener el certificado de bachillerato de Mà ©xico sin salir de los Estados Unidos.  ¿Quà © hay sobre la educacià ³n temprana  o pre-k? La educacià ³n temprana  no es obligatoria pero se brinda en un buen nà ºmero de escuelas pà ºblicas y privadas. Comienza a partir de los 3 aà ±os y el programa Head Start promueve la participacià ³n de nià ±os de bajos recursos. Los padres o tutores interesados deben consultar con las opciones en su lugar de residencia, ya que hay grandes diferencias entre distritos y estados. Escuelas, derechos migrantes y problemtica de visas Todos los nià ±os en edad de recibir educacià ³n obligatoria, es decir, en grados K-12 tienen derecho a asistir a una escuela pà ºblica en el distrito de su residencia habitual. Esto aplica por supuesto a los ciudadanos americanos, a los residentes permanentes y  Ã‚  tambià ©n a los nià ±os indocumentados. Asà ­ lo establecià ³ claramente una sentencia de la Corte Suprema que se conoce como Plyler v. Doe. Los padres, madres o tutores que confronten problemas por su estatus migratorio o el de sus nià ±os pueden contactar con Equity and Civil Rights, explicar su problema y solicitar que se cumpla la ley. Tambià ©n pueden asistir a las escuelas pà ºblicas los nià ±os presentes en los Estados Unidos con visas derivadas, como por ejemplo, la F-2, la H-4 o la J-2. Tambià ©n los hijos de extranjeros con visas de inversià ³n E-1 o E-2 vlidas. Sin embargo, la situacià ³n es muy diferente para el caso de nià ±os que ingresan a los Estados Unidos con visa de turista. Estudiar en una escuela pà ºblica significa que se est cometiendo una infraccià ³n migratoria y cada vez es ms frecuente que se le revoque la visa al nià ±o y tambià ©n a sus padres. Son varias las opciones de visa para estudiar en Estados Unidos que se brinda a esos nià ±os. Es muy importante entender que desde el punto de vista de la ley migratoria y las escuelas es muy distinta la situacià ³n de un nià ±o indocumentado, que sà ­ puede ir a las escuelas, y la de un nià ±o que ingresa al paà ­s con visa de turista y pretende asistir a una escuela pà ºblica. Estos  nià ±os no estn protegidos por Plyler v. Doe. Idioma, educacià ³n especial, vacunas y alimentos Si los nià ±os no hablan inglà ©s o si los padres desean que hablen con fluidez inglà ©s y espaà ±ol, pueden considerar los programas de educacià ³n que se brindan en uno o ambos idiomas. Hay una gran variedad de opciones, dependiendo del lugar de residencia. Madres, padres y tutores de nià ±os con situaciones especiales, como por ejemplo autismo, epilepsia, parlisis cerebral, etc deben explorar las diversas opciones de educacià ³n especial que mejor se ajusten a las necesidades de sus hijos. Hay opciones muy diversas, desde integracià ³n a escuelas especiales. Lamentablemente, las oportunidades no son las mismas y dependen en gran medida del lugar de residencia. Entre los requerimientos para registrar nià ±os para las escuelas es muy comà ºn el de pedir el rà ©cord de vacunas, si bien esto no es igual en todos los estados y hay importantes diferencias. En esta pgina en espaà ±ol de Los Centros para el Control y Prevencià ³n de Enfermedades se explica informacià ³n muy importante sobre dà ³nde llevar al nià ±o a vacunar, cules son las vacunas y la edad para recibirlas e incluso quià ©n puede obtener ayuda econà ³mica para las vacunaciones. Finalmente, destacar que todos los nià ±os enrolados en escuelas pà ºblicas o en privadas sin fin de lucro pueden recibir asistencia de alimentos si asà ­ lo precisan. Es indiferente su estatus migratorio y/o el de sus padres ya que lo à ºnico que se tiene en cuenta es la situacià ³n alimentaria del nià ±o. El programa ms grande es el Programa Nacional de Almuerzos Escolares. Tambià ©n destacar el Programa de Desayunos Gratuitos. Estas ayudas tambià ©n estn disponibles en verano cuando las escuelas no estn en activo. Despuà ©s de la educacià ³n obligatoria La enseà ±anza superior puede seguirse en colleges o universidades. Es importante considerar el costo e intentar evitar, en la medida de lo posible, llegar al momento de recibir el tà ­tulo con mucha deuda, ya que puede ser un gran lastre. Considerar las opciones de becas, debiendo los estudiantes excelentes esforzarse y animarse y creerse que pueden optar a lo mejor. Estas son 12 universidades de à ©lite que becan a todo tipo de estudiantes, incluidos los indocumentados. Tambià ©n considerar la opcià ³n de los colegios comunitarios, que resultan ms econà ³micos, adems de brindar otras ventajas. Puntos clave: educacià ³n en Estados Unidos En Estados Unidos, la educacià ³n de los nià ±os y adolescentes es obligatoria.Tipos de escuelas: pà ºblicas (50,7 millones de estudiantes) y privadas (5,9 millones de alumnos). Tambià ©n es legal recibir educacià ³n en casa, pero cada estado regula este derecho de diferente manera.Categorà ­as de escuelas pà ºblicas: regulares, chapter y magnet.Educacià ³n obligatoria y migracià ³n: por sentencia de la Corte Suprema Plyler vs. Doe de 1982, los nià ±os indocumentados tienen derecho a estudiar en escuelas pà ºblicas. Los nià ±os con visas derivadas hijos de trabajadores temporales o estudiantes internacionales tienen tambià ©n ese derecho. Por el contrario, es ilegal estudiar con una visa de turista. Este es un artà ­culo informativo. No es asesorà ­a legal.