Job information sources and applicant perceptions : antecedents, correlates, and outcomes

xiii, 406, [196] leaves : ill. ; 29 cm.Includes abstract.Includes bibliographical references (leaves 378-406).The current research used three studies to examine recruitment source usage, job seeker perceptions of recruitment sources and the relationships between several recruitment sources' correlates. The relationship between recruitment sources, job information, expectations and outcome variables was also examined. Study One used archival data from a large employee and employer survey developed by Statistics Canada, the Workplace Environment Survey (WES) and looked at the change in recruitment source usage over time as well as several firm and individual differences predictors. Study Two utilized qualitative interviews to elicit job seeker perceptions of recruitment sources. Based on the first two studies, Study Three incorporated theoretical constructs such as recruitment source perceptions, expectations, job information gathered and received, self efficacy and affective commitment in order to extend and test the relationships between information and recruitment sources. Study One found a significant increase across time in the use of the internet as a recruitment source and a significant degree of stability in the usage levels of other sources. While individual differences in firms and job seekers were correlated with the types of recruitment sources used, the predictive power of these variables was weak. Study Two uncovered that recruitment sources fulfill multiple purposes; finding job openings, preparing for selection processes and determining perceived fit. A tendency to use multiple sources in job search was clear, contrary to the findings in Study One. Recruitment sources themselves were found to be perceived in ways which may be unintended by the recruiting organization. Study Three supported findings of non-neutral perceptions for various recruitment sources and indications that perceived informativeness did not necessarily follow the typical formal/informal divide proposed in past research. Study Three also found evidence that expectations, perceived fairness and affective commitment explained a significant amount of variance in turnover intensions and job satisfaction; however, recruitment sources themselves did not significantly contribute to the outcomes nor did job information. These findings suggest that further research on recruitment sources should focus on more proximal outcomes such as intention to apply, success in the selection process, quality of job applicants and ease of integration into the organization

Steel waste valorisation Steel Slag Waste Effect on Concrete Shrinkage

The concept of sustainability is becoming widespread every day in society, enterprises and institutions. Defining something as sustainable means that the relationship that it establishes with the environment does not represent an aggression or a threat to the latter neither when it is being utilized nor when it stops performing the function for which was designed. To make this happen we need a system in which the main priority is recycling. Everything mentioned above is related to what is called the “Circular Economy”. Concrete is one of the most widely used construction materials in the world. However, the production of portland cement, an essential constituent of concrete, leads to the release of significant amounts of CO22. The global production of concrete represents more than 5% of the anthropogenic emissions of carbon dioxide every year, mainly from the production of cement. The replacement of cement by fly ash and other industrial waste, such as steel slags, is a good example of how resource conservation can be improved and contamination can be reduced. On the other hand, future trends are predicted to increase demand for steel worldwide. Mainly due to the expected improvement in the living standards and demands of underdeveloped populations. The steelmaking process produces a by-product called slag ranging from 10 to 15% per tonne of steel, where reuse is still reduced and much of it is deposited in a landfill. This study presents laboratory test results on the total and autogenous shrinkage of medium strength concrete with partial replacement of cement by slags. Two different slags were tested, namely ladle furnaces slags (LFS) and ground granulated blast furnace slags (GGBFS). The results show the concrete shrinkage behavior when 25% of substitution are used. These data are important to predict future behavior and show that for the substitution dosages used there are no significant divergences for the shrinkage.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

The Microbe-Derived Short Chain Fatty Acid Butyrate Targets miRNA-Dependent p21 Gene Expression in Human Colon Cancer

Colonic microbiota ferment non-absorbed dietary fiber to produce prodigious amounts of short chain fatty acids (SCFAs) that benefit the host through a myriad of metabolic, trophic, and chemopreventative effects. The chemopreventative effects of the SCFA butyrate are, in part, mediated through induction of p21 gene expression. In this study, we assessed the role of microRNA(miRNA) in butyrate's induction of p21 expression. The expression profiles of miRNAs in HCT-116 cells and in human sporadic colon cancers were assessed by microarray and quantitative PCR. Regulation of p21 gene expression by miR-106b was assessed by 3′ UTR luciferase reporter assays and transfection of specific miRNA mimics. Butyrate changed the expression of 44 miRNAs in HCT-116 cells, many of which were aberrantly expressed in colon cancer tissues. Members of the miR-106b family were decreased in the former and increased in the latter. Butyrate-induced p21 protein expression was dampened by treatment with a miR-106b mimic. Mutated p21 3′UTR-reporter constructs expressed in HCT-116 cells confirmed direct miR-106b targeting. Butyrate decreased HCT-116 proliferation, an effect reversed with the addition of the miR-106b mimic. We conclude that microbe-derived SCFAs regulate host gene expression involved in intestinal homeostasis as well as carcinogenesis through modulation of miRNAs

The Microbe-Derived Short Chain Fatty Acid Butyrate Targets miRNA-Dependent p21 Gene Expression in Human Colon Cancer

Colonic microbiota ferment non-absorbed dietary fiber to produce prodigious amounts of short chain fatty acids (SCFAs) that benefit the host through a myriad of metabolic, trophic, and chemopreventative effects. The chemopreventative effects of the SCFA butyrate are, in part, mediated through induction of p21 gene expression. In this study, we assessed the role of microRNA(miRNA) in butyrate's induction of p21 expression. The expression profiles of miRNAs in HCT-116 cells and in human sporadic colon cancers were assessed by microarray and quantitative PCR. Regulation of p21 gene expression by miR-106b was assessed by 3′ UTR luciferase reporter assays and transfection of specific miRNA mimics. Butyrate changed the expression of 44 miRNAs in HCT-116 cells, many of which were aberrantly expressed in colon cancer tissues. Members of the miR-106b family were decreased in the former and increased in the latter. Butyrate-induced p21 protein expression was dampened by treatment with a miR-106b mimic. Mutated p21 3′UTR-reporter constructs expressed in HCT-116 cells confirmed direct miR-106b targeting. Butyrate decreased HCT-116 proliferation, an effect reversed with the addition of the miR-106b mimic. We conclude that microbe-derived SCFAs regulate host gene expression involved in intestinal homeostasis as well as carcinogenesis through modulation of miRNAs.</p

Exploring the components, asymmetry and distribution of relationship quality in wild Barbary macaques (Macaca sylvanus)

Social relationships between group members are a key feature of many animal societies. The quality of social relationships has been described by three main components: value, compatibility and security, based on the benefits, tenure and stability of social exchanges. We aimed to analyse whether this three component structure could be used to describe the quality of social relationships in wild Barbary macaques (Macaca sylvanus). Moreover, we examined whether relationship quality was affected by the sex, age and rank differences between social partners, and investigated the asymmetric nature of social relationships. We collected over 1,900 hours of focal data on seven behavioural variables measuring relationship quality, and used principal component analysis to investigate how these variables clustered together. We found that relationship quality in wild Barbary macaques can be described by a three component structure that represents the value, compatibility and security of a relationship. Female-female dyads had more valuable relationships and same-age dyads more compatible relationships than any other dyad. Rank difference had no effect on the quality of a social relationship. Finally, we found a high degree of asymmetry in how members of a dyad exchange social behaviour. We argue that the asymmetry of social relationships should be taken into account when exploring the pattern and function of social behaviour in animal societies

Benthic macroinvertebrate production

Macroinvertebrates were sampled on a regular basis from March to October 1973. A relationship between chironomid length and biomass was established. Production equations to be used for these insects are reported. A similar length/weight relationship is presently being explored for the oligochaetes. A proposal is made for calculating their production as well as for sphaerids and P. affinis. Sampling is expected to continue at least through March 1974 to give a full year's data. In the near future the results of this study are to be correlated with studies concerning primary production, fish feeding habits, lake sedimentation rates, and physical properties

Estimates of biomass of detritus food chain

Macrobenthos populations of the IBP lakes were sampled during October and November of 1972. Analyses of the samples revealed dominance of chrinomids and oligochaetes in both littoral and profundal regions for at least this time of year. Due to sampling difficulties the oligochaete material was not used for chemical analyses. Biomass per square meter was determined for the chironomids. From these data, literature values were used to estimate calories, carbohydrate, fat, and protein per square meter. A model taken from Johanson and Brinkhurst (1971b) is presented as a means of determining amounts and pathways of detrital input to higher trophic levels. Because this model encompasses more than the macrobenthos, data from other concurrent IBP studies will be used. The model and the 1972 project have suggested different sampling regimes and methods to be undertaken in 1973.Best copy available