Sex of authority role models and achievement by men and women: Leadership performance and recognition.

Investigated whether performance, for both sexes, is conditioned by expectations for them, with expectations being at least partly defined by same-sex role models. 276 undergraduates were exposed to all-male, all-female, or mixed-authority role models and then participated in a 4-person mixed-sex discussion. Vicarious cultural experience of authority models was represented by videotaped reenactments of TV commercials. Ss viewed either 4 traditional commercials showing a man as authority and woman as subordinate, or 4 reversed-role versions in which the male and female actors switched roles in the same scenarios. Personally observed authority models were represented by the experimenter, who supervised the discussion. Sex of authority in the commercials and sex of experimenter were crossed in a factorial design. In the all-male authority condition, men and women performed equally (as measured by talking time and number of substantive content suggestions), but recognized only the men as leaders in postdiscussion evaluation questionnaires. In the all-female authority condition, men and women also performed equally, and, in addition, they also received equal leadership recognition. In the 2 mixed-authority conditions, men objectively outperformed women. The data show that recognition is not a direct function of performance for either sex but is influenced by the evaluators' expectations, which are partly defined by sex of authority role models in the social environment. (103 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Culturally competent interventions for abused and suicidal African American women.

This article focuses on interventions with low-income, African American women who are survivors of domestic abuse and who have made one or more suicide attempts. The authors review the literature on domestic abuse and suicidal behavior in African American women, and discuss the association between abuse and suicide in this population. Next, they propose an integrated theoretical model for understanding suicidal behavior as one possible coping response to the stress of a domestic abuse situation. The model utilizes concepts from the literature on stress and coping as well as stages of change. A culturally sensitive group treatment intervention that is based on the theoretical model is presented. The intervention focuses on ensuring women's safety, increasing coping skills and resource mobilization, and promoting supportive relationships in a manner that is consistent with each woman's sociocultural context. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

PY181 Pigment Microspheres of Nanoplates Synthesized via Polymer‐Induced Liquid Precursors

Organic pigments are important crystalline substances, and their properties and applications rely on size and shape control. Pigment Yellow 181 (PY181) is an industrial azo pigment that is light and weatherfast and suitable for high temperature processing. One disadvantage is its needle‐like shape in the default β‐phase, which makes the pigment difficult to process in industry, e.g., in polymer melts, where a spherical structure would be ideal. Here, we show for the first time, that polymer‐induced liquid precursor structures can be formed even in association to a chemical reaction. Furthermore, it is demonstrated that biomineralization principles can be exploited for the generation of advanced functional materials, such as pigments with novel complex morphology and different properties. Stable PY181 microspheres of nanoplates in the β‐phase were obtained in mixed solvents of water and isopropanol by direct azo coupling under the directing influence of a designed copolymer additive aminobenzoylaminobenzamide‐acetoacetyl‐poly(ethylene imine)‐block‐poly(ethylene glycol) (ABABA‐acetoacetyl‐PEI‐b‐PEG).     

时尚的哲学

在设计零售卖场的时候,如何将外面的人吸引进来并不是一个首要的关注点,然而．在最新完工的Zadig＆Voltaire品牌巴黎专卖店项目中这几乎成为了一个必要条件。坐落于赛纳河左岸的这家专卖店．实际上是一排带有窗户的房间,俯瞰着美得令人瞠目结舌的圣席毕斯教堂．     

Anthropogenic impacts in North Poland over the last 1300 years — A record of Pb, Zn, Cu, Ni and S in an ombrotrophic peat bog

Lead pollution history over Northern Poland was reconstructed for the last ca. 1300 years using the elemental and Pb isotope geochemistry of a dated Polish peat bog. The data show that Polish Pb-Zn ores and coal were the main sources of Pb, other heavy metals and S over Northern Poland up until the industrial revolution. After review of the potential mobility of each element, most of the historical interpretation was based on Pb and Pb isotopes, the other chemical elements (Zn, Cu, Ni, S) being considered secondary indicators of pollution. During the last century, leaded gasoline also contributed to anthropogenic Pb pollution over Poland. Coal and Pb-Zn ores, however, remained important sources of pollution in Eastern European countries during the last 50 years, as demonstrated by a high ²⁰⁶Pb/²⁰⁷Pb ratio (1.153) relative to that of Western Europe (ca. 1.10). The Pb data for the last century were also in good agreement with modelled Pb inventories over Poland and the Baltic region.     

Unshakable loyalty in the food sector: sustainable customer retention. Empirical study of organic food consumers in Germany

Because of high competitive pressure in the food sector producers and retailers constantly increase their marketing efforts to convince consumers of their own products, services, brands or stores. One of the main goals is to generate loyal consumers because they are less likely to switch to competitors and more tolerant of price increases than non-loyal consumers. But what is true consumer loyalty? Repurchases are often used as an approximate indicator of loyalty. But the marketing literature emphasises that to identify ??true loyalty?? it is important to consider both consumers?? purchasing patterns as well as consumers?? underlying attitudes. Thus, true loyalty includes both a behavioural component, which results in repeated purchases, and an attitudinal component, which results in a dispositional commitment to a product, brand, or company and associates a unique value with it. However, regarding the food sector and the characteristics of food products, the question arises whether the above mentioned strict definition of true consumer loyalty can be applied to the food sector. Our paper aims to empirically test this question. To do so we conducted 27 semi-structured in-depth interviews with regular customers of a German organic food retailer in March/April 2009.     

Evidence for P-Glycoprotein Involvement in Cell Volume Regulation Using Coulter Sizing in Flow Cytometry

The regulation of cell volume is an essential function that is coupled to a variety of physiological processes such as receptor recycling, excitability and contraction, cell proliferation, migration, and programmed cell death. Under stress, cells undergo emergency swelling and respond to such a phenomenon with a regulatory volume decrease (RVD) where they release cellular ions, and other osmolytes as well as a concomitant loss of water. The link between P-glycoprotein, a transmembrane transporter, and cell volume regulation is controversial, and changes in cells volume are measured using microscopy or electrophysiology. For instance, by using the patch-clamp method, our team demonstrated that chloride currents activated in the RVD were more intense and rapid in a breast cancer cell line overexpressing the P-glycoprotein (P-gp). The Cell Lab Quanta SC is a flow cytometry system that simultaneously measures electronic volume, side scatter and three fluorescent colors; altogether this provides unsurpassed population resolution and accurate cell counting. Therefore, here we propose a novel method to follow cellular volume. By using the Coulter-type channel of the cytometer Cell Lab Quanta SC MPL (multi-platform loading), we demonstrated a role for the P-gp during different osmotic treatments, but also a differential activity of the P-gp through the cell cycle. Altogether, our data strongly suggests a role of P-gp in cell volume regulation.     

Flexible Zinc–Tin Oxide Thin Film Transistors Operating at 1 kV for Integrated Switching of Dielectric Elastomer Actuators Arrays

Flexible high‐voltage thin‐film transistors (HVTFTs) operating at more than 1 kV are integrated with compliant dielectric elastomer actuators (DEA) to create a flexible array of 16 independent actuators. To allow for high‐voltage operation, the HVTFT implements a zinc–tin oxide channel, a thick dielectric stack, and an offset gate. At a source–drain bias of 1 kV, the HVTFT has a 20 µA on‐current at a gate voltage bias of 30 V. Their electrical characteristics enable the switching of DEAs which require drive voltages of over 1 kV, making control of an array simpler in comparison to the use of external high‐voltage switching. These HVTFTs are integrated in a flexible haptic display consisting of a 4 × 4 matrix of DEAs and HVTFTs. Using a single 1.4 kV supply, each DEA is independently switched by its associated HVTFT, requiring only a 30 V gate voltage for full DEA deflection. The 4 × 4 display operates well even when bent to a 5 mm radius of curvature. By enabling DEA switching at low voltages, flexible metal‐oxide HVTFTs enable complex flexible systems with dozens to hundreds of independent DEAs for applications in haptics, Braille displays, and soft robotics.     

Stand der Technik: Anschmierungen in Radial-Zylinderrollenlagern

Forschung im Ingenieurwesen - Anschmierungen innerhalb von Wälzlagern zählen zu den Verschleißarten, die bis heute nicht vollständig verstanden wurden. Bekannt ist, dass...     

Regulating self-organized collaborative learning: the importance of homogeneous problem perception,immediacy and intensity of strategy use

Very often, university students deliberately form self-organized study groups, e.g. to study collaboratively for an upcoming exam. Yet, very little is known about what regulation problems such self-organized study groups encounter during their learning process and how they try to cope with these problems. Therefore, this study investigates how completely self-organized groups (i.e., non-guided groups outside the classroom that form without external impulse) regulate their collaborative learning process when faced with different kinds of regulation problems. More specifically, we tested the hypotheses that members of self-organized study groups are more satisfied with their group learning experience (a) the more homogeneous their problem perceptions are within their group, (b) the more they apply immediate (rather than non-immediate) strategies to remedy their regulation problems, and (c) the more frequently they apply regulation strategies. In a longitudinal study, N?=?122 students, voluntarily studying for their exams in N?=?52 groups, were asked to indicate the types of problems they experienced, the types of strategies they used to tackle those problems, and their satisfaction with their group learning experience after each of their self-organized study meetings. Hierarchical linear modeling confirmed all hypotheses. Qualitative analysis of two selected groups’ self-reported situational data provided additional insights about the mechanisms that may have contributed to the results. Our study provides important directions for future research, including the recommendation to identify the processes by which groups (a) can reach homogeneity of problem perceptions and (b) coordinate the choice of appropriate strategies within the group.