Home About us Contact
|
Home About us Contact | ||
|
|
||
Article Presents Data (article + present_data)
Selected AbstractsClinical Success of Zirconia in Dental ApplicationsJOURNAL OF PROSTHODONTICS, Issue 1 2010Zeynep Özkurt DDS Abstract The application of ceramic materials for the fabrication of dental restorations is a focus of interest in esthetic dentistry. The ceramic materials of choice are glass ceramics, spinel, alumina, and zirconia. Zirconia was introduced into dentistry in the 1990s because of its good mechanical and chemical properties and is currently being used as a material for frameworks, dowels, implants, abutments, and orthodontic brackets. Many in vitro studies about zirconia use have been published, but clinical long-term studies are very important. This article presents data regarding the incidence of clinical success and complications of zirconia in these dental applications. Clinical studies published to date seem to indicate that zirconia is well tolerated and sufficiently resistant. [source] Smoking as a Weight-Control Strategy among Adolescent Girls and Young Women: A ReconsiderationMEDICAL ANTHROPOLOGY QUARTERLY, Issue 3 2004MIMI NICHTER Many studies have reported that adolescent girls and young women smoke to control their weight. The majority of these studies are cross-sectional and report on correlational data from quantitative surveys. This article presents data from ethnographic interviews with 60 smokers, interviewed in high school and in follow-up interviews at age 21. Contrary to previous research, this study found little evidence for the sustained use of smoking as a weight-control strategy. In high school, smokers were no more likely than nonsmokers to be trying to lose weight. In the follow-up study, 85 percent of informants replied that they had never smoked as a way to control their weight. One-half of informants at age 21 believed that smoking as a weight-control strategy would be ineffective, while the other one-half had no idea whether it would work or not. Researchers need to exert caution in propagating the idea that smoking is commonly used as a conscious and sustained weight-control strategy among adolescent females and young women. [source] ,I could be dead for two weeks and my boss would never know': telework and the politics of representationNEW TECHNOLOGY, WORK AND EMPLOYMENT, Issue 2 2009Andrea Whittle This article presents data from a qualitative study of teleworking consultants in a European firm. We examine the ,gap' between the utopian visions produced by the consultants for the benefit of clients and the tales of isolation, disconnection, disaffection and cynicism we observed when clients were not present. The study highlights the power and politics involved in the diffusion of popular images of technology-enabled flexibility. [source] Collaborations with faith-based social service coalitionsNONPROFIT MANAGEMENT & LEADERSHIP, Issue 2 2007Helen Rose Ebaugh Based on the first national survey of faith-based social service coalitions in the United States, this article presents data on the degree to which these nonprofit organizations collaborate with other specific organizational types, as well as the range and intensity of these collaborations. In general, faith-based coalitions tend to collaborate most frequently with other faith-based agencies, a pattern especially characteristic of the more religiously expressive ones. However, collaboration with non-faith-based organizations is also quite common. Based on seven organizational characteristics, we are able to predict which faith-based coalitions are most likely to collaborate with different types of organizations: coalitions that have more explicitly religious policies and practices with reference to clients and staffs are less likely to participate in intense collaborations with some types of secular organizations, and consistently less likely to do so with all types of governmental agencies. [source] Dependence of interfacial strength on the anisotropic fiber properties of jute reinforced compositesPOLYMER COMPOSITES, Issue 9 2010J.L. Thomason The upsurge in research on natural fiber composites over the past decade has not yet delivered any major progress in large scale replacement of glass fiber in volume engineering applications. This article presents data on injection-molded jute reinforced polypropylene and gives a balanced comparison with equivalent glass reinforced materials. The poor performance of natural fibers as reinforcements is discussed and both chemical modification of the matrix and mercerization and silane treatment of the fibers are shown to have little significant effect on their level of reinforcement of polypropylene in comparison to glass fibers. A hypothesis is proposed to explain the poor performance of natural fibers relating their low level of interfacial strength to the anisotropic internal fiber structure. POLYM. COMPOS., 31:1525,1534, 2010. © 2009 Society of Plastics Engineers [source] Children Enrolled in Public Pre-K: The Relation of Family Life, Neighborhood Quality, and Socioeconomic Resources to Early CompetenceAMERICAN JOURNAL OF ORTHOPSYCHIATRY, Issue 2 2006Oscar Barbarin PhD This article presents data on the family and social environments of 501 children enrolled in public sponsored pre-K in 5 states and tests the relation of these resources to child competence. Structured interviews and questionnaires provide information from parents about the family's social and economic status. Direct assessments and teacher reports provide data on children's literacy, numeracy, and behavioral problems. A majority of the children served in public pre-K lived in poverty and showed decrements in language but not in other domains. A socioeconomic resource factor consisting of parental education, household income, and material need predicted all domains of children's functioning. Children from households high in socioeconomic resources entered pre-K with more well developed language and math skill but fewer behavioral problems than their disadvantaged peers. Neighborhood quality status was related to language competence and mother's marital status to math competence. Neighborhood quality and income level may have their impact on child competence through their relation to dyadic quality and the health and the psychological well-being of the parents. [source] Arsenic and thallium data in environmental samples: Fact or fiction?REMEDIATION, Issue 4 2010Susan D. Chapnick Matrix effects may increasingly lead to erroneous environmental decisions as regulatory limits or risk-based concentrations of concern for trace metals move lower toward the limits of analytical detection. A U.S. Environmental Protection Agency Office of Technical Standards Alert estimated that environmental data reported using inductively coupled plasma spectrometry (ICP-AES) has a false-positive rate for thallium of 99.9 percent and for arsenic of 25 to 50 percent. Although this does not seem to be widely known in the environmental community, using three case studies, this article presents data in environmental samples that demonstrate severe matrix effects on the accuracy of arsenic and thallium results. Case Study 1 involves soil results with concentrations that approached or exceeded the applicable regulatory soil cleanup objectives of 13 mg/kg for arsenic and 2 mg/kg for thallium. Reanalysis using ICP coupled with a mass spectrometer (ICP-MS) confirmed all thallium results were false positives and all arsenic results were biased high, concluding no action was required for soil remediation. Case Study 2 involves groundwater results for thallium at a Superfund site, where thallium was detected in groundwater up to 21.6 , g/L using ICP-AES. Reanalysis by ICP-MS reported thallium as nondetect below the applicable regulatory level in all samples. ICP-MS is usually a more definitive and accurate method of analysis compared to ICP-AES; however, this is not always the case, as we demonstrate in Case Study 3, using data from groundwater samples at an industrial site. Through a weight-of-evidence approach, it is demonstrated that although method quality control results were acceptable, interferences in some groundwater samples caused biased high results for arsenic using ICP-MS, which were significantly lower when reanalyzed using hydride generation atomic fluorescence spectrometry. Causes of these interference effects and conclusions from the three case studies to obtain accurate metal data for site assessment, risk characterization, and remedy selection are discussed. © 2010 Wiley Periodicals, Inc. [source] | |||||||||||||