Management of Energy Recourses, Marginal Input- Output Coefficients, and Layers of Techniques: A Case Study of US Chemical Industry

The embodied technical change should reduce the cost of production of the commodity. However, price structure, wages and interest rates also will change over time. Thus if a commodity is following a fixed price regime, the adjustment of a historical input-output table to current price wage level will leaves less and less profit per unit of output. The extent of this reduction will indicate the extent of technological change. There are different approaches to the prediction of changes in input-output coefficients. The first approach, attributable to Leontief (1941) and Stone (1962), assumes that input-output matrices change over time in a “biproportional” way. The other approach is to estimate trends in individual coefficients using statistical data. Former approach is used by a number of experts, including Fontela, et al. (1970), Almon, et al. (1974) and Carter (1970). Arrow and Hoffenberg (1959), Henry (1974), Savaldson (1970, 1976), Ozaki (1976), Aujac (1972) and Buzunov (1970). These are examples of the application of the quantitative approach for forecasting input-output coefficients. Still another approach which could not get much attention for forecasting input-output coefficients, is constructing the marginal input-output coefficients [Tilanus (1967); Middelhoek (1970)]. Marginal coefficients for forecasting constructed by Tilanus and Middelhoek are based on average input-output tables, which shows that still new approach (marginal) is based on the old (average) on

A Study of School Lunch Habits in Primary School Children during Recess Time

Children are the asset of any nation. These should be take heed very carefully. The paper aims to examine the eating habits of children during recess time in primary schools of Hyderabad, a city of Pakistan. Recess is the crucial time for the healthy development of the school children. Continue teaching and learning process in a particular classroom without taking any food makes the students tired and fatigue which ultimately affects their learning. The main objective of the study was to explore the food items that are mostly taken up by the children during recess time and their reason. For the study, all Government primary schools of Hyderabad city were selected as the population while; convenient method of sampling was used to select the 80 children from 20 selected primary schools. Qualitative method approach was used to collect the data from these students which consist of an interview schedule. The findings show that majority of the students neither eat breakfast at home nor bring food from home to eat during recess time and like to take food from the pushcarts standing inside or the outside the school. Keywords: School lunch, Recess time, Health, Primary school Children

Role of Tuition Centers in the Performance and Achievement of Students: A Case of Hyderabad District, Sindh, Pakistan

This research is designed to explore the importance of tuition centers in the perception of students. It tries to find out the role, supporting methods, environment and good characteristics of tuition centers, their owners and management to support the student to learn effectively and bring good grades in their board examinations. A qualitative research method employed to collect data from the 30 participating students who receive tuition at different centers of Hyderabad district. Semi-structured interview protocol was design; discussed with five experts of field; improved as per suggestions of field experts; piloted on three students; and then implemented and conducted on the recruited sample of students of class Higher Secondary Certificate -II (XII) in order to collect data. The results revealed that the students who receive tuition at different centers bring good grades in their examination and have suitable knowledge about their subjects taught at centers. Their previous grades were found good and attractive such as A-1 and A with more than 80% and 70% marks respectively, due to coaching received at tuition centers that time, reveled from experiences shared by students

Behavioral Characteristics Rated by District Education Officers (DEOs) for Effective Principalship

The purpose of this study was to investigate, by means of quantitative research methods, District Education Officers (DEOs) perceptions regarding the behavioral characteristics of effective secondary schhol principals. The major findings were based on the results of the eight interviews conducted with DEOs. In an effort to determine the findings, the research worked with the data, organizing it, breaking it down question by question, interview by interview, then synthesizing it searching for patterns of responses. It was noted that DEOs value common aspects of the principal’s role differently and to avoid degrees. If the principalship is about leadership and effective leadership is defined differently by different people, then what an effective principal does may be viewed differently. Key Words: Perception, District Education Officer (DEO), Effectivity, Principal, Leadership, Behavioral Characteristics

Effect of consanguinity on birth weight for gestational age in a developing country.

Consanguinity, the marriage between relatives, has been associated with adverse child health outcomes because it increases homozygosity of recessive alleles. The objective of this study was to assess the effect of consanguinity on the birth weight of newborns in Greater Beirut, Lebanon. Cross-sectional data were collected on 10,289 consecutive liveborn singleton newborns admitted to eight hospitals belonging to the National Collaborative Perinatal Neonatal Network during the years 2000 and 2001. Birth weight was modeled by use of the fetal growth ratio, defined as the ratio of the observed birth weight to the median birth weight for gestational age. A mixed-effect multiple linear regression model was used to predict the net effect of first- and second-cousin marriage on the birth weight for gestational age, accounting for within-hospital clustering of data. After controlling for medical and sociodemographic covariates, the authors found a statistically significant negative association between consanguinity and birth weight at each gestational age. No significant difference was observed in the decrease in birth weight between the first- and second-cousin marriages. Overall, consanguinity was associated with a decrease in birth weight for gestational age by 1.8% (beta = -0.018, 95% confidence interval: -0.027, -0.008). The largest effects on fetal growth were seen with lower parity and smoking during pregnancy

Predictors of breast-feeding in a developing country: results of a prospective cohort study.

OBJECTIVE: Data on the prevalence and predictors of breast-feeding remain scarce in Lebanon. Moreover, no study has previously addressed the effect of the paediatrician's sex on breast-feeding. The present study aimed to assess the prevalence and predictors of breast-feeding at 1 and 4 months of infant age while exploring the potential role of the sex of the paediatrician. DESIGN: Prospective cohort study. Predictors of breast-feeding significant at the bivariate level were tested at 1 and 4 months through two stepwise regression models. SETTING: Infants were enrolled through the clinics and dispensaries of 117 paediatricians located in Beirut, Lebanon, and its suburbs. SUBJECTS: A total of 1,320 healthy newborn infants born between August 2001 and February 2002 were prospectively followed during the first year. FINDINGS: Breast-feeding rates at 1 and 4 months were 56.3 % and 24.7 %, respectively. Early discharge, high parity and religion were significantly associated with higher breast-feeding rates at 1 and 4 months of age. Maternal age proved significant only at 1 month, while maternal working status and sex of the paediatrician were significant at 4 months. A novel finding of our study was the positive effect of female paediatricians on breast-feeding continuation until 4 months of age (OR = 1.49; 95 % CI 1.03, 2.15). CONCLUSIONS: Breast-feeding rates are low at 1 and 4 months of infant age in Beirut. Further research to investigate the interactions between female physicians and lactating mothers in maintaining breast-feeding in other populations is warranted. The results constitute the basis for designing interventions targeting policy makers, health professionals and mothers

Virological and clinical characteristics of hepatitis delta virus in South Asia

<p>Abstract</p> <p>Background & Aims</p> <p>There is a paucity of data on the impact of hepatitis D virus (HDV) in patients with hepatitis B virus (HBV) infection from South Asia. We studied the impact of HDV co-infection on virological and clinical characteristics.</p> <p>Methods</p> <p>We collected data of 480 patients with HBsAg positive and a detectable HBV DNA PCR, who presented to the Aga Khan University, Karachi and Isra University in Hyderabad, Pakistan in the last 5 years. HDV co-infection was diagnosed on the basis of anti-HDV. ALT, HBeAg, HBeAb and HBV DNA PCR quantitative levels were checked in all patients. We divided all patients into two groups based on anti-HDV, and compared their biochemical, serological & virological labs and clinical spectrum. Clinical spectrum of disease included asymptomatic carrier (AC), chronic active hepatitis (CAH), immuno-tolerant phase (IP), and compensated cirrhosis (CC).</p> <p>Results</p> <p>HDV co-infection was found in 169 (35.2%). There were 164 (34.6%) HBeAg positive and 316 (65.4%) HBeAg negative patients. Mean ALT level was 66 ± 73 IU. 233 (48.5%) had raised ALT. HBV DNA level was ≥ 10e5 in 103(21.5%) patients. Overall, among HBV/HDV co-infection, 146/169 (86.4%) had suppressed HBV DNA PCR as compared to 231/311 (74.3%) patients with HBV mono-infection; p-value = 0.002. Among HBeAg negative patients 71/128(55.5%) had raised ALT levels among HBV/HDV co-infection as compared to 71/188 (37.8%) with HBV mono-infection (p-value = 0.002); levels of HBV DNA were equal in two groups; there were 27/128 (21%) patients with CC among HBV/HDV co-infection as compared to 23 (12%) in HBV mono-infection (p-value = 0.009); there were less AC (p-value = 0.009) and more CAH (p-value = 0.009) among HBV/HDV co-infection patients. Among HBeAg positive patients, serum ALT, HBV DNA levels and the spectrum of HBV were similar in the two groups.</p> <p>Conclusions</p> <p>HBV/HDV co-infection results in the suppression of HBV DNA. A fair proportion of HBV/HDV co-infected patients with HBeAg negative have active hepatitis B infection and cirrhosis as compared to those with mono-infection.</p

Critical Analysis of the Impact of Job on the Social Status of Women in Pakistan

Although the larger portion of the world population is women but hardly 25% women are employed. Furthermore, they have been given second class status. Considering the need and importance of job for women, a survey regarding the impact of job on the social status of women has been conducted. A sample of 100 employed and 100 unemployed women was randomly selected from access population for the study. The findings of the study showed that there was significant effect of the job on the social status and empowerment of women. The employed women of the urban area had got more opportunities than the employed women of rural area. The marriages of women were also closely associated with their jobs. However, to unemployed women, the social status of men and women was equal but employed women, rejecting the statement, believed that social status of men was higher than women at their work place. Nevertheless, the social status of employed women was higher than unemployed men. Keywords: Social status, job, marriage, empowerment &amp; workplace

Trends of Surgical Career Selection Among Medical Students and Graduates: A Global Perspective

Background:Declining trends in surgery have been well-researched in the North American region, but little is known about the international dynamics affecting this phenomenon. A comprehensive approach to this emerging issue is lacking. Objectives: Our objective in this study is to explore global trends related to medical student interest in surgical careers. We will also identify factors influencing the choice of surgery as a career and outline practical interventions to nurture interest in these fields, as described in the literature. Design: We present a focused review of worldwide trends of surgical career selection among medical students of geographically distant and diverse sociocultural backgrounds. A systematic literature search was performed using PubMed. The studies were conducted over the last fifteen years with the study populations scattered over 6 continents. Results: North American studies have shown a declining trend for medical students to select surgery as a career, but a recent recovery has been observed. However, surgery is still the popular choice of career among Middle Eastern and Far-Eastern Asian men. Sociocultural variants and personal satisfaction are likely influential factors with financial rewards being the least significant. Surgery is also popular in Nigeria despite their increased awareness of risk of HIV/AIDS associated with surgery. A decline in surgery has been observed in Australia, New Zealand, and South Africa. Medical students and graduates of Greece, Switzerland, and the UK mostly prefer nonsurgical careers. Multiple extrinsic and intrinsic factors appear to play a role for such a phenomenon. Specific interventions are now being used to create a rebound effect for such a declining trend observed in most of the regions worldwide. Conclusions: Global trends show a variation of interest in surgery as a career option throughout the 6 continents. Possible factors affecting this phenomenon are similar among geographically distant and diverse student cultures