Block censoring scheme with two-parameter exponential distribution

This paper deals with a new censoring scheme, called ‘Block Censoring’ which reduces considerably the total time on test in the life testing experiments with respect to the common used experimental tests such as rightly censored data. This new scheme is analysed when the lifetimes of products follow the two-parameter exponential distribution. Specially, it is proved that the respective spacings are independently distributed exponential. The problem of estimating parameters is investigated in details.A Monte Carlo simulation is conducted for obtaining the optimal block censoring scheme in the sense of the shortest expected test time. Finally, a real data set on times to breakdown of an insulating fluid between electrodes from Nelson [Applied life data analysis. New York: Wiley; 1982. p.105] is analysed.     

Designing an economic rectifying sampling plan in the presence of two markets

In this paper, an optimization model is developed for the economic design of a rectifying inspection sampling plan in the presence of two markets. A product with a normally distributed quality characteristic with unknown mean and variance is produced in the process. The quality characteristic has a lower specification limit. The aim of this paper is to maximize the profit, which consists the Taguchi loss function, under the constraints of satisfying the producer's and consumer's risk in two different markets simultaneously. Giveaway cost per unit of sold excess material is considered in the proposed model. A case study is presented to illustrate the application of proposed methodology. In addition, sensitivity analysis is performed to study the effect of model parameters on the expected profit and optimal solution. Optimal process adjustment problem and acceptance sampling plan is combined in the economical optimization model. Also, process mean and standard deviation are assumed to be unknown value, and their impact is analyzed. Finally, inspection error is considered, and its impact is investigated and analyzed.     

Women’s Strategic Responses to Intimate Partner Violence: A Study in a Rural Community of Bangladesh

The objective of this study was to explore women’s strategic responses to physical violence perpetrated by an intimate partner. Twenty women from a rural area of the Narshingdi district in the Dhaka division of Bangladesh who experienced physical violence at home participated in the study. Development of the interview protocol and data analysis were carried out by applying the consensual qualitative research (CQR) method. The results showed that several themes, such as women’s responses to intimate partner violence, arose from the data. First, coping strategies to pre‐violent events included three themes: (i) leaving the scene; (ii) trying to divert attention; and (iii) preparing to protest. Women’s strategic responses to violent events consisted of four themes: (i) leaving the scene; (ii) remaining silent or no giving response; (iii) seeking help from others; and (iv) protesting against the violence. Lastly, women’s strategic responses to post‐violent events consisted of three themes: (i) temporary abstinence; (ii) verbally abusive behavior to family members; and (iii) going to the parental home. Given the findings of this study, we conclude by suggesting that more work is needed to better understand effective strategies and to draw women to institutional services to prevent violence to a greater extent.     

Revolution,war and modernization: Population policy and fertility change in Iran

Fertility trends in Iran over recent decades can be plausibly related to a number of causal factors. Population policy shifts were quite marked, and were related to political upheaval and war, which influenced both official policy and popular perceptions of the nation’s need for children. A range of developmental factors were also important. The key fertility trends to be explained include the rise to an exceptionally high level in the early 1980s (a TFR of just below 7), and the speed of the subsequent decline to a TFR of about 2.7 in 1996. As well as estimating the proximate determinants of these trends, the paper sets them in their political and developmental context. Iran’s fertility trends are then compared with those of Islamic countries of North Africa and West Asia to gain additional insights into possible causal factors. An adequate explanation of fertility change in Iran needs to draw on elements of a number of theories of fertility transition.     

Bootstrap power of the generalized correlation coefficient

We present a bootstrap Monte Carlo algorithm for computing the power function of the generalized correlation coefficient. The proposed method makes no assumptions about the form of the underlying probability distribution and may be used with observed data to approximate the power function and pilot data for sample size determination. In particular, the bootstrap power functions of the Pearson product moment correlation and the Spearman rank correlation are examined. Monte Carlo experiments indicate that the proposed algorithm is reliable and compares well with the asymptotic values. An example which demonstrates how this method can be used for sample size determination and power calculations is provided.     

Class Position,Class Ideology and Class Voting: Mobilization of Support for the New Democratic Party in the Canadian Election of 1984*

La recherche canadienne sur le vote des classes a surtout fait ressortir l'importance des forces structurelles qui contribuent à faire naître l'appui au Nouveau Parti démocratique (NPD) en insistant moins sur l'idéologie des classes. Le présent article contient un modèle LISREL faisant état des relations entre les positions des classes, leur idéologic et le vote en faveur du NPD selon la base de données provenant de l'étude des élections nationales du Canada de 1984. Les observations soulignent l'importance que revêtent, en tant que sources des suffrages des classes, trois dimensions de l'idéologie des classes qui repré-sentent en partie le résultat de la position de ces dernières. L'idéologie égalitaire et l'appui au maintien des syndicate forts ont des effete directs et prononcés sur le vote en faveur du NPD alors que l'identifi-cation à une classe exerce un effet indirect par le biais de deux autres variables. Même si la position objective des classes agit indépendam-ment sur les suffrages accordés au NPD, ses répercussions semblent limitées comparativement à celles que produisent les trois variables liées à l'étude. En modélisant les effete de la position et de l'idéologie des classes, les auteurs ont employé trois variables non encore utili-sées dans les analyses précédentes des suffrages des classes, soit l'appui des père et mère au NPD, la présence d'un syndiqué (autre que le répondant) dans le ménage et l'appartenance à une «classe nouvelle». Chacune de ces variables a un effet majeur sur le soutien donné au NPD. Quant aux répercussions attribuables à la région, elles semblent assez limitées une fois que l'on a tenu compte du vote des père et mère en faveur du NPD et de l'appui accordéà ce dernier à l'occasion des élections de 1980. Canadian research on class voting has primarily emphasized structural forces that produce support for the NDP, with less attention to class ideology. This paper presents a LISREL model of relationships among class position, class ideology, and voting for the NDP, based on data from the Canadian National Election Study of 1984. The findings point to the importance of three dimensions of class ideology, produced in part by class position, as sources of class voting. Egalitarian ideology and support for union strength have strong direct effects on NDP voting, and class identification exerts an indirect effect through the other two variables. Although objective class position has an independent effect on NDP voting, its impact appears to be modest in relation to that of the three attitudinal variables. In modelling the effects of class position and ideology, three variables not used in previous Canadian analyses of class voting have been employed: parental support for the NDP, presence of a union member (other than the respondent) in the household, and membership in a “New Class.” Each has a solid effect on NDP support. The effects of region appear as quite modest, after controlling for parental support for the NDP and for NDP support in the 1980 election.     

Uptake of Chloroform by Skin During Short Exposures to Contaminated Water

Uptake of chloroform into hairless rat stratum corneum from dilute aqueous solutions was studied using tape-stripping to determine amounts deposited in the skin under various environmental exposure scenarios. The length of exposure of sedated animals to the chloroform-containing medium, the frequency and duration of tape-stripping, and the number of tape-strips per location were varied to map the stratum corneum substantivity of chloroform. Eight minutes immersion of the rat within a well-stirred solution at 36°C was found to be adequate time for the gradient to be established fully across the stratum corneum. Penetration was progressively deeper as the exposure time increased. Substantial evaporative loss of chloroform from the aqueous medium of application seem to be responsible for lower cumulative amounts taken up when the same solution was held on the rat's skin within a stainless steel template of fixed area. Of the total uptake (29 mg) from a dilute stirred solution of chloroform (0.44 mg/ml) at 36°C, about 95% was systematically absorbed after a 30 min exposure as determined by residuals (measurement of bath concentrations).     

The Effect of Activating Metacognitive Strategies on the Listening Performance and Metacognitive Awareness of EFL Students

This study investigates the effect of activating metacognitive strategies on the listening performance of English as a foreign language (EFL) university students and explores the impact of such strategies on their metacognitive awareness of the listening task. The participants were N = 50 students of English literature at the state university of Qom, Iran. After screening the participants from among 60 students, they were randomly assigned to the experimental and control groups. The experimental group (n = 25) received the metacognitive strategy instruction based on the models proposed by Vandergrift and Tafaghodtari (2010), while the control group (n = 25) received just the listening input with no strategy instruction. The listening module of the International English Language Testing System (IELTS) was utilized to evaluate the listening performance of the participants in both groups in pretests and posttests, and the Metacognitive Awareness Listening Questionnaire (MALQ) instrument was applied to measure the metacognitive awareness of the treatment group before and after the treatment. The results of the IELTS test revealed that the experimental group significantly outperformed the control group on the posttest and according to the analysis of the MALQ instrument there was a significant improvement in the students’ level of metacognitive awareness after strategy instruction. The interview results in the discussion section also supported the findings and shed more light on the details.     

An exploratory study of subjective well-being in organizations–A mixed method research approach

ABSTRACT

Subjective well-being (SWB) has been widely found to have a profound impact on the individual, yet the process of its occurrence in public organizations remains unexplored. So the primary purpose of this paper is to explore the determining factors affecting the process of employee’s subjective well-being in public organizations using mixed methods research. Qualitative analysis using the grounded theory methodology reveals the effective factors that affect the process of employee’s subjective well-being in public organizations. Quantitative hypotheses are then developed based on a qualitative investigation. Survey data were collected from employees of public organizations in one of the provinces of Iran. Analysis of Moment Structure is used for data analysis. The results of the research revealed that both individual and organizational factors (as causal factors) influence the employees’ subjective well-being process (life satisfaction and positive affect). This phenomenon leads to the use of strategies which are affected by intervening and contextual factors. The consequences of this process are to change the attitude and behavior of individuals and improve the efficiency and effectiveness of the organization. This paper is among the first known to examine subjective well-being in public organizations using mixed methods research. The mixed methods approach offers a better insight to understanding effective factors affecting subjective well-being compared to the use of either a qualitative or quantitative method alone.