Miracle-dz/UniFAR-FTUs huggingface dataset:
Sleep loss and performance in residents and nonphysicians: a meta-analytic examination.

STUDY OBJECTIVES To explore the effect of sleep loss on cognitive function, memory, and vigilance in resident physicians and nonphysicians and on residents' clinical performance. DESIGN Meta-analysis of 60 studies on the effect of sleep deprivation, with a total sample of 959 physicians and 1,028 nonphysicians and 5,295 individual effect indexes. OUTCOME MEASURES Cognitive performance and performance on clinical tasks under acute and partial chronic sleep deprivation. Additional analyses stratified the data by physician/nonphysician, type of performance, and length and type of sleep loss and assessed the combined effect of several of these factors. RESULTS Sleep loss of less than 30 hours reduced physicians' overall performance by nearly 1 standard deviation and clinical performance by more than 1.5 standard deviations. The effect of sleep deprivation was larger in nonphysicians than in physicians (corrected d value -.995 vs -.880), with these smaller effects likely resulting from "study factors," primarily variation in the hours without sleep prior and chronically reduced sleep in the "rested" controls in physician studies. CONCLUSIONS The weekly hours and continuous wakefulness permitted under the current national minimum standards for residents may not completely guard against the negative effect of sleep loss on cognitive and clinical performance. Research is needed to explore the effect of continuous duty periods and chronic partial sleep loss in residents and to assess the clinical and educational consequences of sleep loss. The goal should be to combine scientifically based duty-hour limits with broader efforts to enhance patient safety and resident learning.
Reduced frontal lobe activity in subjects with high impulsivity and alcoholism.

OBJECTIVE Impulsivity is an important characteristic of many psychiatric disorders, including substance-related disorders. These disinhibitory disorders have a similar underlying genetic diathesis, with each disorder representing a different expression of the same underlying genetic liability. This study assessed whether there is a relationship between impulsivity and alcohol dependence, and their correlations with P3 (P300) amplitude, a proposed endophenotype of alcoholism. METHODS Healthy control subjects (n=58) and subjects with DSM-IV diagnosis of alcohol dependence (n=57) were assessed with a visual oddball task. Event-Related Potentials (ERPs) were recorded from 61 scalp electrodes and P3 amplitudes measured. Barratt Impulsiveness Scale (BIS), version 11, was used to evaluate impulsivity. Source localization of P3 was computed using low-resolution brain electromagnetic tomography (LORETA). RESULTS Alcoholic subjects manifested reductions in target P3 amplitudes (p<0.0001). Using LORETA, significantly reduced activation was mapped in the cingulate, medial, and superior frontal regions in alcoholic subjects and highly impulsive subjects. Alcoholic subjects had significantly higher scores on the BIS (p<0.0001) than nonalcoholic individuals. There were significant negative correlations between total scores on BIS and P3 amplitude (r=-0.274, p=0.003, on Pz; r=-0.250, p=0.007, on Cz). CONCLUSIONS Our results demonstrate a strong frontal focus of reduced activation during processing of visual targets in alcoholic subjects and individuals with higher impulsivity. The findings suggest that impulsivity may be an important factor that underlies the pathogenesis of alcohol dependence. Studies are underway to examine the relationship between impulsivity and ERPs in offspring of alcoholic subjects, and to identify genes associated with the underlying predisposition involved in disinhibitory disorders.
Feature Selection in Automatic Music Genre Classification

This paper presents the results of the application of a feature selection procedure to an automatic music genre classification system. The classification system is based on the use of multiple feature vectors and an ensemble approach, according to time and space decomposition strategies. Feature vectors are extracted from music segments from the beginning, middle and end of the original music signal (time decomposition). Despite being music genre classification a multi-class problem, we accomplish the task using a combination of binary classifiers, whose results are merged in order to produce the final music genre label (space decomposition). As individual classifiers several machine learning algorithms were employed: naive-Bayes, decision trees, support vector machines and multi-layer perceptron neural nets. Experiments were carried out on a novel dataset called Latin music database, which contains 3,227 music pieces categorized in 10 musical genres. The experimental results show that the employed features have different importance according to the part of the music signal from where the feature vectors were extracted. Furthermore, the ensemble approach provides better results than the individual segments in most cases.
Bad Dates or Emotional Trauma?

Backlash critics of campus rape research have claimed that researchers exaggerate their figures by labeling as rape victims those women who experience bad dates. Although researchers have compared stranger with acquaintance rape victims, they have not compared women raped while too drunk to resist and those raped by force. This study of 65 rape victims (in a sample of 388 college seniors) found no evidence for critics' claims. Women raped by intoxication are not less emotionally affected and do not blame themselves more. Most women did not classify their experiences as rape, although all were victims under criminal law. This lack of recognition is what causes hidden victims, who do not report or seek help.
The Great Recession

Based on Greenfield’s theory of social change and human development, we predicted that adolescents’ values, behaviors, and self-assessments would become more collectivistic and less individualistic during the Great Recession (2008–2010) compared to the prerecession period (2004-2006), thereby reversing long-term trends from the 1970s. Data came from Monitoring the Future, a nationally representative yearly survey of 12th graders. Concern for others and environmentalism increased from the prerecession period to recession, reversing long-term declines. Long-term trends toward increasing materialism partially reversed: Wanting a job making lots of money continued to increase, the increase in the importance of money leveled off, and the increase in desiring to own expensive material items reversed. Long-term trends toward increasingly positive self-views continued. Correlations with economic indicators (median income, employment rate) over the entire time period (1976–2010) showed that collectivism was high and individualism was low during times of economic deprivation, consistent with Greenfield’s theory.
Looking in the Wrong Direction Correlates With More Accurate Word Learning

Previous research on lexical development has aimed to identify the factors that enable accurate initial word-referent mappings based on the assumption that the accuracy of initial word-referent associations is critical for word learning. The present study challenges this assumption. Adult English speakers learned an artificial language within a cross-situational learning paradigm. Visual fixation data were used to assess the direction of visual attention. Participants whose longest fixations in the initial trials fell more often on distracter images performed significantly better at test than participants whose longest fixations fell more often on referent images. Thus, inaccurate initial word-referent mappings may actually benefit learning.
Circulating levels of cytochrome c after resuscitation from cardiac arrest: a marker of mitochondrial injury and predictor of survival.

Ca(2+) overload and reactive oxygen species can injure mitochondria during ischemia and reperfusion. We hypothesized that mitochondrial injury occurs during cardiac resuscitation, causing release of cytochrome c to the cytosol and bloodstream while activating apoptotic pathways. Plasma cytochrome c was measured using reverse-phase HPLC and Western immunoblotting in rats subjected to 4 or 8 min of untreated ventricular fibrillation and 8 min of closed-chest resuscitation followed by 240 min of postresuscitation hemodynamic observation. A sham group served as control. Plasma cytochrome c rose progressively to levels 10-fold higher than in sham rats 240 min after resuscitation (P < 0.01), despite reversal of whole body ischemia (decreases in arterial lactate). Cytochrome c levels were inversely correlated with left ventricular stroke work (r = -0.40, P = 0.02). Western immunoblotting of left ventricular tissue demonstrated increased levels of 17-kDa cleaved caspase-3 fragments in the cytosol. Plasma cytochrome c was then serially measured in 12 resuscitated rats until the rat died or cytochrome c returned to baseline. In three survivors, cytochrome c rose slightly to <or=2 microg/ml and returned to baseline within 96 h. In nine nonsurvivors, cytochrome c rose progressively to significantly higher maximal levels [4.6 (SD 2.0) vs. 1.6 (SD 0.3) microg/ml, P = 0.029] and at faster rates [0.7 (SD 0.5) vs. 0.1 (SD 0.1) microg.ml(-1). h(-1), P = 0.046] than in survivors. Plasma cytochrome c may represent a novel in vivo marker of mitochondrial injury after resuscitation from cardiac arrest that relates inversely with survival outcome.
Biases in Visual Attention in Depressed and Nondepressed Individuals

Abstract The present study utilised a cognitive paradigm to examine attentional biases in mildly depressed persons. Twelve depressed and 12 nondepressed subjects completed an attentional task similar to that employed by MacLeod, Mathews, and Tata (1986). A tachistiscope was used to present subjects with a series of word pairs, each with one word printed above the other. Three types of word pairs were presented: manic-neutral, depressed-neutral, and manic-depressed. Selective attention to one member of a word pair was assessed using ac perception task. Based on cognitive models of depression, it was hypothesised that the depressed subjects would attend more to depressed-content words than to manic- or neutral-content words, whereas the nondepressed subjects would not exhibit any attentional biases. In contrast to these predictions, analyses indicated that whereas the depressed subjects attended equally to depressed-, manic-, and neutral-content words, the nondepressed subjects attended more to manic-conten.
Representing and testing organizational theories: A holistic construal.

This research was supported by a Senior Fulbright Research Grant to R. P. Bagozzi and a grant to L. W. Phillips from the Distribution Research and Educational Foundation (DREF), National Association of Wholesale Distributors, Washington, DC. Special thanks go to Dirk Van Dongen, Executive Director of DREF, and Ron Schreibman, Director of Research, for their assistance throughout the project. The contributions made to the research by Louis W. Stern, Northwestern University, are gratefully acknowledged. Comments on an earlier draft by Claes Fornell, University of Michigan, Barbara Lawrence and Alvin Silk, MIT, and V. Srinivasan and Jeffrey Pfeffer, Stanford University, also contributed to ideas presented in this paper, as did suggestions made by the editors. A holistic construal is presented to represent and test organizational theories, using examples from contemporary organizational theory and data from a recent study of wholesale distribution companies. The methodology provides a mechanism for linking theory construction and theory testing in organization research by explicitly representing theoretical and empirical concepts, nonobservational hypotheses, and correspondence rules. Unlike traditional methods used for construct validation and hypothesis testing, the methodology permits the researcher to model the extent of random and systematic error in measures of theoretical concepts and to control these sources of error when testing substantive hypotheses. Comparisons made between the holistic construal and traditional procedures show how the latter can lead to inaccurate conclusions about the status of a theory's constructs, hypotheses, and measures.
Enabling and aligning assessment for learning: some research and policy lessons from Queensland

Drawing on the Queensland School Reform Longitudinal Study (QSRLS), this paper documents the assessment practices of about 250 Queensland primary and secondary classrooms and the extent to which they align with those pedagogical practices described as ‘productive pedagogies’ in the research. In considering the extent of this alignment, the paper outlines in some detail the concept of ‘productive assessment’, which also developed out of the research. The QSRLS demonstrated the necessity of aligning pedagogies and assessment practices with curriculum purposes to enhance student learning and contribute to socially just outcomes. A lack of visible alignment in the assessment practices of teachers in the study is demonstrated and discussed. When considered in conjunction with the low intellectual demands of the pedagogies observed, there are serious social justice implications to be drawn from the research. The paper also shows the significance of systemic assessment policies in relation to teacher assessment practices. The paper conceptualizes ‘productive assessment’ in relation to broader sociological considerations of assessment practices. Some possible explanations for the findings are proffered and some brief recommendations about a way forward in relation to teacher professional development around assessment literacy are suggested.
Contribution to the fusion of soft facial and body biometrics for remote people identification

In this work, we are interested in exploring soft biometrics to identify people at a distance without recourse to their cooperation. The proposed system is based on fusing two soft modalities of the face, which are the skin and hair colors, and six soft modalities of the body - one for the height, four for the body measurements, and one for gait cycle. Tested on a Chimera database of faces and video sequences, the fusion at the decision level using the technique of majority voting of soft facial and body traits has led to a 95% recognition rate.
Social Science as Reading and Performance

In the age of the `return to the empirical' in which the theoretical disputes of an earlier era seem to have fallen silent, we seek to excavate the intellectual conditions for reviving theoretical debate, for it is upon this recovery that deeper understanding of the nature and purpose of empirical social science depends. We argue against the all too frequent turn to ontology, whereby critical realists have sought an epistemological guarantor of sociological validity. We seek, to the contrary, to crystallize a culturally-based, hermeneutic account of a rational social science. Derived from disputes within the sociology of culture, on the one hand, and the long-standing concerns of interpretive philosophy, on the other, we offer a cultural-sociological approach to epistemology. We view the production of truth in social science as a reading of a meaningful social world, and as a performance of truth-claims that is constrained by evidence, but whose success depends on other contextual factors. We conclude that the rationality of social science can be achieved only by forgoing ontology. Theories are abstractions of investigators' meanings that allow the interpretation of social meanings in turn, whether those are actions, relations, or structures. Successful explanations are those that intertwine these meaning structures of investigators and actors in an effective way.
Measuring Perceived Supervisory and Organizational Support

Organizational commitment has traditionally been measured by focusing on the employees' identification with the organization. Eisenberger, Huntington, Hutchison, and Sowa have suggested that employees' commitment is affected by their perception of the organization's commitment to the employees. We propose that this type of commitment consists of both a perception of a global, organizational commitment to employees and a perception of support from supervisors. This study describes the translation of the Survey of Perceived Organizational Support and the development of a Survey of Perceived Supervisory Support to measure these concepts.
Comparing Two Methods to Assess Power Output Associated With Peak Oxygen Uptake in Cyclists

Abstract Rønnestad, BR. Comparing two methods to assess power output associated with peak oxygen uptake in cyclists. J Strength Cond Res 28(1): 134–139, 2014—The aim of this study was to compare 2 methods that are frequently used to calculate the power output (MAP) that is associated with peak oxygen uptake (V[Combining Dot Above]O2peak) in the exercise mode of cycling. One method calculates the MAP by extrapolation of the individual V[Combining Dot Above]O2 to submaximal power output relationships to the measured V[Combining Dot Above]O2peak (MAPDaniels), whereas the other method uses the minimal power output that elicits V[Combining Dot Above]O2peak during a graded V[Combining Dot Above]O2peak test (MAPBillat). Thirteen male competitive cyclists (V[Combining Dot Above]O2peak = 66 ± 5 ml·kg−1·min−1) performed 3 test sessions; first to determine MAPDaniels and MAPBillat; second and third sessions were used to measure the time to exhaustion during continuous cycling exercise to exhaustion (Tmax), time to 95% of V[Combining Dot Above]O2peak, and time ≥ 95% of V[Combining Dot Above]O2peak with MAPDaniels and MAPBillat. Whether it was MAPDaniels or MAPBillat that was used on the second or third test session was randomized. There was no difference between mean MAPDaniels and mean MAPBillat (380 ± 38 vs. 383 ± 34 W, respectively) and their associated Tmax, time to 95% of V[Combining Dot Above]O2peak, and time ≥ 95% of V[Combining Dot Above]O2peak during a Tmax test. In conclusion, this study did not find any difference between MAPDaniels and MAPBillat. The practical application of this study is that the choice of a method to calculate the MAP can be determined by practicality and that findings from studies using these 2 methods are comparable.
Development of a career meta-competency model for sustained employability

The purpose of this study was to construct a career meta-competency model for sustained employability in the contemporary world of work. This study explored a convenience sample (N = 304) of early career employees’ personality preferences (measured by the MyersBriggs Type Indicator), self-esteem (measured by the Culture-free Self-esteem Inventories for Adults) and emotional intelligence (measured by the Assessing Emotions Scale), as a composite set of their personality attributes, in relation to their employability attributes (measured by the Employability Attributes Scale). The participants comprised 81% blacks and 64% females employed in the business management field in managerial/supervisory (53%) and staff (28%) level positions. Their ages ranged between 25 and 40 years (early adulthood and establishment phase) (79%). The correlations, canonical correlations and multiple regression results indicated that the participants’ personality attributes were significantly and positively related to their employability attributes. Structural Equation Modelling indicated a moderate fit between the theoretically hypothesised career metacompetency model and the empirically tested structural model. The results indicated job level as a significant moderator of the relationship between the participants’ personality and employability attributes. Middle management level was associated with an inverse relationship between the personality and employability attributes. Staff and middle managers did not significantly differ regarding their mean scores on these variables. On a theoretical level, the study deepened understanding of the cognitive, affective, conative and interpersonal behavioural dimensions of the hypothesised career meta-competency model. On an empirical level, the study produced an empirically tested career meta-competency model in terms of the various behavioural dimensions. On a practical level, career
Soluble and cell surface ICAM‐3 in blood and cerebrospinal fluid of patients with multiple sclerosis: influence of methylprednisolone treatment and relevance as markers for disease activity

Objective– The expression of intercellular adhesion molecule‐3 (ICAM‐3), a member of the Ig supergene family, is restricted to immune competent cells. Expression of soluble and cell surface ICAM‐3 (s‐ and c‐ICAM‐3) is preferentially seen in the state of low activation of the immune system. We studied the relevance of the expression levels of s‐ and c‐ICAM‐3 in cerebrospinal fluid (CSF) and blood as markers for disease activity as well as the influence of high‐dose methylprednisolone (MP) treatment upon the expression of s‐ and c‐ICAM‐3 in blood of patients with multiple sclerosis (MS). Materials and methods– A total of 33 patients (relapses n=25, remission n=8) with relapsing–remitting MS were included into the study. CSF and blood were acquired from all of them. Of the patients 24 were treated with high‐dose MP. In those, blood was additionally collected at the 10th day of the therapy and after 3 months. Expression of c‐ICAM‐3 was determined by two colour FACS analysis, whereas the concentration levels of s‐ICAM‐3 were measured by ELISA. Results– In CSF we detected a significant decrease of the expression levels of c‐ICAM‐3 on CD3+ T cells in 25 patients suffering from an acute relapse in contrast to 8 patients with remission (P=0.04). In comparison to the levels before treatment and after 3 months, at the 10th day of MP treatment we obtained highly significant changes of the expression values of c‐ICAM‐3 both on CD3+ T cells (P=0.0004; P=0.005) and CD14+ monocytes/macrophages (P=0.0006; P=0.008) on the 10th day of high‐dose MP treatment from 24 MS patients. Conclusion– The increase of ICAM‐3 levels might indicate the anti‐inflammatory effect of the MP treatment. It could be interesting to search for similar effects investigating the new immune modulatoring therapy forms of MS.
Gifted Adolescents' Attitudes Toward Their Giftedness

The purpose of this study was to assess gifted adolescents' views of their own giftedness and their perceptions regarding how giftedness is viewed by others. One hundred eighty-four gifted adolescents completed an open-ended questionnaire on giftedness. Resutts indicated that their views of giftedness were not unidimensional. They were positive about their giftedness but did not believe that others were positive. Also, gifted adolescents viewed giftedness as positive with regard to their personal growth and academic performance but as negative in social relations with others. Gifted adolescents have strongly mixed attitudes about their giftedness.