Miracle-dz/UniFAR-FTUs huggingface dataset:
Energy consumption and message delay analysis of QoS enhanced base station controlled dynamic clustering protocol for wireless sensor networks

This paper proposes and analyzes a Quality of service enhanced Base station Controlled Dynamic Clustering Protocol (QBCDCP), suitable for the support of video and imaging traffic over resource constrained wireless sensor nodes. The protocol achieves energy efficiency through a rotating head clustering approach and delegation of energy-intensive tasks to a high-power base station, while providing quality of service (QoS) support by including delay and bandwidth parameters in the route selection process. A Time Division Multiple Access (TDMA) scheme is used for intra- and intercluster communication, providing bandwidth reservation. Performance of QBCDCP is evaluated in terms of energy consumption and end-to-end image delay via analytical and discrete-event simulation techniques. Numerical results provide insights on the selection of network parameters such as number of clusters that improve the sensing node lifetime while maintaining high quality of service. The results also demonstrate the trade-off between end-to-end image delay and sensor node lifetime.
The Relationship between Mentoring Program and Mentees Psychological and Emotional Support: Personality as a Moderator

This study aims to examine the relationship between mentoring program, personality and mentee outcomes. One hundred respondents from different faculties in one of the universities in East Malaysia were involved in this study. Pearson Correlation was employed to determine the relationship between mentoring program and mentee outcomes, personality and mentee outcomes, mentoring program and psychological and emotional support. The results showed that there was a significant relationship between mentoring program and mentee outcomes. Multiple Regressions was used to assess whether personality act as a moderator between mentoring program and mentee outcomes. The findings indicated that personality moderates the relationship between mentoring program and mentee outcomes. The findings of this research are beneficial for mentoring program in universities in Malaysia, especially, in ensuring better mentoring outcomes. Implication of this research on organization and individuals was also discussed.
Cracking the walls of leadership: women in Saudi Arabia

Purpose The purpose of this paper is to examine the obstacles to women’s advancement in Saudi Arabia. The paper addresses the question “what are women’s experiences of becoming leaders and what influences their leadership practice? ” It does this by drawing on gender and Middle Eastern literature, as well as empirical evidence of the perceptions, experience and challenges of women in Saudi. Design/methodology/approach The study contributes a consideration of the academic literature, supported by empirical findings from 25 interviews with professional women in Saudi Arabia. The data identify the perceptions, experiences and challenges of professional women in Saudi. It concludes by outlining the practical need for the review and promotion of policies to eradicate inequalities in the workplace. Findings The data show that the challenges faced by professional women in Saudi Arabia are social, religious, cultural and organizational. The findings reveal that women’s relationship to self, others, place and work are key influencers in how they perceive and experience leadership. The findings also indicate the need for a review and promotion of policies to eradicate inequalities which prevent women from becoming leaders. Research limitations/implications The research limitations are that it focuses on a small number of professional women in Saudi Arabia (n = 25). However, Saudi Arabia is a country where research access is difficult; therefore, this research has significant implications for beginning to understand women and their experience of leadership in Saudi. It also addresses a gap in the scant research which does exist in this area. Practical implications The study highlights that unless significant barriers are removed, women will not progress to higher leadership positions in organizations. The future role of women as leaders in Saudi Arabia will require society, organizations and women themselves to change the traditional role-expectations of women. The paper considers what can be done to create a more levelled platform for women to operate in organizations at senior levels. Social implications The findings and recommendations will prove useful in raising awareness among policymakers and practitioners regarding the experiences and the obstacles faced by women in Saudi Arabia because of the social, religious and culture context in which they live. Originality/value This study contributes to enriching the gender and leadership literature in a country that has been poorly addressed so far. Its originality lies in the context of Saudi Arabia. The research is significant in that, in examining women’s perceptions of the challenges and opportunities of leadership in the workplace, it provides an understanding of women’s experience of leadership in Saudi that has not previously been considered in the literature on women in the Middle East. This study therefore contributes to understanding the how and why of leadership by listening to the ways in which women learn and practise leadership.
Effects of gender composition of target and sender dyads on the tendency to infer lies

Lying is so common in human behavior that some have labeled it a social skill. Despite the ubiquity of lies, humans have consistently been found to be poor lie detectors. Attempts have been made to improve the accuracy of human lie detection. Unfortunately, the most successful training only improves accuracy slightly above the level of chance. Because of its importance to society, considerable effort has been aimed at developing methods to help determine when people are lying. Researching how and why humans infer that another person is lying has the potential to advance the understanding of lie detection. Researchers have found that gender influences subjective judgments of trustworthiness and credibility. Further, gender may also influence behaviors resulting from these judgments. In other words, gender is likely to influence the tendency to infer lies. The goal of this study was to determine if differences exist in the likelihood of inferences that lies are being told due to the sex of the sender of the lies, the target of the lies, and a third-person evaluator of the lies. It was hypothesized that targets (individuals receiving a message) and third person evaluators would infer lies more often when the potential liar was of the opposite sex of the target than when the potential liar was the same sex as the target. Male participants would infer lies more often than female participants in all conditions except when non-verbal cues are unavailable. A scale of femininity would be negatively related to the number of lie inferences. Finally, it was thought that lies would be inferred less often when liars are female than when they are male. The results did not confirm any of the hypotheses. One surprising finding was that,
Five High-Redshift Quasars Discovered in Commissioning Imaging Data of the Sloan Digital Sky Survey

We report the discovery of five quasars with redshifts of 4.67–5.27 and z′-band magnitudes of 19.5–20.7 (MB ∼ -27). All were originally selected as distant quasar candidates in optical/near-infrared photometry from the Sloan Digital Sky Survey (SDSS), and most were confirmed as probable high-redshift quasars by supplementing the SDSS data with J and K measurements. The quasars possess strong, broad Lyα emission lines, with the characteristic sharp cutoff on the blue side produced by Lyα forest absorption. Three quasars contain strong, broad absorption features, and one of them exhibits very strong N V emission. The amount of absorption produced by the Lyα forest increases toward higher redshift, and that in the z = 5.27 object (DA ≈ 0.7) is consistent with a smooth extrapolation of the absorption seen in lower redshift quasars. The high luminosity of these objects relative to most other known objects at z ≳ 5 makes them potentially valuable as probes of early quasar properties and of the intervening intergalactic medium.
Sufficient conditions for the genericity of feedback stabilisability of switching systems via Lie-algebraic solvability

This paper addresses the stabilisation of discrete-time switching linear systems (DTSSs) with control inputs under arbitrary switching, based on the existence of a common quadratic Lyapunov function (CQLF). The authors have begun a line of work dealing with control design based on the Lie-algebraic solvability property. The present paper expands on earlier work by deriving sufficient conditions under which the closed-loop system can be caused to satisfy the Lie-algebraic solvability property generically, i.e. for almost every set of system parameters, furthermore admitting straightforward and efficient numerical implementation.
Formation Control and Collision Avoidance for Multi-agent Non-holonomic Systems: Theory and Experiments

In this paper we present a theoretical and experimental result on the control of multi-agent non-holonomic systems. We design and implement a novel decentralized control scheme that achieves dynamic formation control and collision avoidance for a group of non-holonomic robots. First, we derive a feedback law using Lyapunov-type analysis that guarantees collision avoidance and tracking of a reference trajectory for a single robot. Then we extend this result to the case of multiple non-holonomic robots, and show how different multi-agent problems, such as formation control and leader—follower control, can be addressed in this framework. Finally, we combine the above results to address the problem of coordinated tracking for a group of agents. We give extensive experimental results that validate the effectiveness of our results in all three cases.
Finding Plans with Branches , Loops and Preconditions

We present a new approach for finding conditional plans with loops and branches for planning in situations with uncertainty in state properties as well as in object quantities. We use a state abstraction technique from static analysis of programs to builds such plans incrementally using generalizations of input example plans generated by classical planners. Preconditions of the resulting plans with loops are computed by analyzing the changes in the counts of objects of different types across each loop. The scope and scalability of this approach are demonstrated using experimental results on common benchmark domains.
Short-Term Investment and the Informational Efficiency of the Market

A dynamic finite-horizon market for a risky asset with a continuum of risk-averse heterogeneously informed investors and a risk-neutral competitive market-making sector is examined. The article analyzes the effect of investors' horizons on the information content of prices. It is shown that short horizons enhance or reduce accumulated price informativeness depending on the temporal pattern of private information arrival. With concentrated arrival of information, short horizons reduce final price informativeness; with diffuse arrival of information, short horizons enhance it. In the process a closed-form solution to the dynamic equilibrium with long-term investors is derived. Article published by Oxford University Press on behalf of the Society for Financial Studies in its journal, The Review of Financial Studies.
Why Do CD8+ T Cells become Indifferent to Tumors: A Dynamic Modeling Approach

CD8+ T cells have the potential to influence the outcome of cancer pathogenesis, including complete tumor eradication or selection of malignant tumor escape variants. The Simian virus 40 large T-antigen (Tag) oncoprotein promotes tumor formation in Tag-transgenic mice and also provides multiple target determinants (sites) for responding CD8+ T cells in C57BL/6 (H-2b) mice. To understand the in vivo quantitative dynamics of CD8+ T cells after encountering Tag, we constructed a dynamic model from in vivo-generated data to simulate the interactions between Tag-expressing cells and CD8+ T cells in distinct scenarios including immunization of wild-type C57BL/6 mice and of Tag-transgenic mice that develop various tumors. In these scenarios the model successfully reproduces the dynamics of both the Tag-expressing cells and antigen-specific CD8+ T cell responses. The model predicts that the tolerance of the site-specific T cells is dependent on their apoptosis rates and that the net growth of CD8+ T cells is altered in transgenic mice. We experimentally validate both predictions. Our results indicate that site-specific CD8+ T cells have tissue-specific apoptosis rates affecting their tolerance to the tumor antigen. Moreover, the model highlights differences in apoptosis rates that contribute to compromised CD8+ T cell responses and tumor progression, knowledge of which is essential for development of cancer immunotherapy.
The “Musical Emotional Bursts”: a validated set of musical affect bursts to investigate auditory affective processing

The Musical Emotional Bursts (MEB) consist of 80 brief musical executions expressing basic emotional states (happiness, sadness and fear) and neutrality. These musical bursts were designed to be the musical analog of the Montreal Affective Voices (MAV)—a set of brief non-verbal affective vocalizations portraying different basic emotions. The MEB consist of short (mean duration: 1.6 s) improvisations on a given emotion or of imitations of a given MAV stimulus, played on a violin (10 stimuli × 4 [3 emotions + neutral]), or a clarinet (10 stimuli × 4 [3 emotions + neutral]). The MEB arguably represent a primitive form of music emotional expression, just like the MAV represent a primitive form of vocal, non-linguistic emotional expression. To create the MEB, stimuli were recorded from 10 violinists and 10 clarinetists, and then evaluated by 60 participants. Participants evaluated 240 stimuli [30 stimuli × 4 (3 emotions + neutral) × 2 instruments] by performing either a forced-choice emotion categorization task, a valence rating task or an arousal rating task (20 subjects per task); 40 MAVs were also used in the same session with similar task instructions. Recognition accuracy of emotional categories expressed by the MEB (n:80) was lower than for the MAVs but still very high with an average percent correct recognition score of 80.4%. Highest recognition accuracies were obtained for happy clarinet (92.0%) and fearful or sad violin (88.0% each) MEB stimuli. The MEB can be used to compare the cerebral processing of emotional expressions in music and vocal communication, or used for testing affective perception in patients with communication problems.
Evolution of chemical abundances in Seyfert galaxies

Aims. To compute the chemical evolution of spiral bulges hosting Seyfert nuclei, based on updated chemical and spectro-photometrical evolution models for the bulge of our Galaxy, to make predictions about other quantities measured in Seyferts, and to model the photometric features of local bulges. The chemical evolution model contains updated and detailed calculations of the Galactic potential and of the feedback from the central supermassive black hole, and the spectro-photometric model covers a wide range of stellar ages and metallicities. Methods. We computed the evolution of bulges in the mass range 2× 10 9 − 10 11 M⊙ by scaling the effi ciency of star formation and the bulge scalelength as in the inverse-wind scenario for el liptical galaxies, and considering an Eddington limited accretion onto the central supermassive black hole. Results. We successfully reproduced the observed relation between the mass of the black hole and that of the host bulge. The observed nuclear bolometric luminosity emitted by the supermassive black hole is reproduced only at high redshift or for the most massive bulges; in the other cases, at z≃ 0 a rejuvenation mechanism is necessary. The energy provided by the black hole is in most cases not significant in the triggering of the galactic wind. The observed high star formation rates and metal overabundances are easily achieved, as well as the constancy of chemical abundances with the redshift and the bulge present-day colours. Those results are not affected if we vary the index of the stellar IMF from x = 0.95 to x = 1.35; a steeper IMF is instead required in order to reproduce the colour-magnitude relation and the present K-band luminosity of the bulge. Conclusions. We show that the chemical evolution of the host bulge, with a short formation timescale of∼ 0.1 Gyr, a rather high effi ciency of star formation ranging from 11 to 50 Gyr −1 according to the bulge mass and an IMF flatter with respect to t he solar neighbourhood, combined with the accretion onto the black hole is suffi cient to explain the main observed features of Seyfert galaxies.
The Perceptions of Five Years Old Group Students’ about Scientists

The purpose of this research is to reveal the perceptions of students of five years old group about scientists. The practice was implemented with 76 students having education in five-age group continuing to various nursery schools located in the center of Kastamonu province. Before starting the practice, the teacher asked the questions of “Who is the scientist? ” and made them thought with the aim of ensuring the awareness of students against scientist. Afterwards, the researchers asked the students to narrate their pictures while they collect the drawings. The paintings were coded by the researchers by using the descriptive analysis method. The codification was made individually at first and then together with all the researchers with the aim of ensuring the reliability of research. In the light of collected information, it was generally seen in the pictures of students that the work environment of scientists is constituted by the space and world and their gender is generally men and also, there was a small number of women scientist profile. It was also determined that the students emphasized the extraterrestrial life and drew the scientists as similar to astronauts and they used space crafts and planets in their paintings. In another finding, scientists were seen as the people who mostly conduct research and use potion in general. Another attractive research finding is that; a small number of students draw the scientist as person who use computer and study lesson. In the light of these findings, it can be told that the students were affected extremely from their environment (the movies and cartoon they watched, their families, etc.…).
A universalização da avaliação e a criação do Ideb: pressupostos e perspectivas

O artigo analisa o processo de incorporacao da nocao de responsabilizacao nas avaliacoes em larga escala e, em particular, as politicas de criacao da Prova Brasil e do Indice de Desenvolvimento da Educacao Basica (Ideb). Argumenta-se que a consolidacao do processo de avaliacao realizado pelo Ministerio da Educacao foi fundamental para a construcao do que se identificou como modelo brasileiro de educacao basica, formado pelo tripe: descentralizacao na oferta dos servicos educacionais, criterios de financiamento definidos pela Federacao e avaliacao centralizada.
Dairy Intake Enhances Body Weight and Composition Changes during Energy Restriction in 18–50-Year-Old Adults—A Meta-Analysis of Randomized Controlled Trials

Background/Aims: A meta-analysis of randomized controlled trials (RCTs) was performed to investigate the effects of dairy food or supplements during energy restriction on body weight and composition in 18–50-year-old. Methods: RCTs ≥ 4 weeks comparing the effect of dairy consumption (whole food or supplements) with control diets lower in dairy during energy restriction on body weight, fat and lean mass were identified by searching MEDLINE, EMBASE, Pubmed, Cochrane Central and World Health Organization International Clinical Trials Registry Platform (WHO ICTRP) until March 2016. Reports were identified and critically appraised in duplicate. Data were pooled using random-effects meta-analysis. Chi2- and I2-statistics indicated heterogeneity. Dose effect was assessed using meta-regression analysis. GRADE guidelines were used to rate the quality (QR) of the evidence considering risk of bias, inconsistency, indirectness, imprecision, publication bias and effect estimates. Results: 27 RCTs were reviewed. Participants consumed between 2 and 4 standard servings/day of dairy food or 20–84 g/day of whey protein compared to low dairy control diets, over a median of 16 weeks. A greater reduction in body weight (−1.16 kg [−1.66, −0.66 kg], p < 0.001, I2 = 11%, QR = high, n = 644) and body fat mass (−1.49 kg [−2.06, −0.92 kg], p < 0.001, I2 = 21%, n = 521, QR = high) were found in studies largely including women (90% women). These effects were absent in studies that imposed resistance training (QR = low-moderate). Dairy intake resulted in smaller loss of lean mass (all trials pooled: 0.36 kg [0.01, 0.71 kg], p = 0.04, I2 = 64%, n = 651, QR = moderate). No between study dose-response effects were seen. Conclusions: Increased dairy intake as part of energy restricted diets resulted in greater loss in bodyweight and fat mass while attenuating lean mass loss in 18–50-year-old adults. Further research in males is needed to investigate sex effects.
Infant–mother attachment security, contextual risk, and early development: A moderational analysis

In light of evidence that the effects of attachment security on subsequent development may be contingent on the social context in which the child continues to develop, we examined the effect of attachment security at age 15 months, cumulative contextual risk from 1 to 36 months, and the interaction of attachment and cumulative risk to predict socioemotional and cognitive linguistic functioning at age 3 years, using data from the National Institute of Child Health and Human Development Study of Early Child Care. Results indicated that early attachment predicts both socioemotional development and language skills, but not cognitive functioning as indexed by a measure of school readiness, and that the effect of attachment on socioemotional development and expressive language varied as a function of social-contextual risk. Insecure–avoidant infants proved most vulnerable to contextual risk, not children classified as secure or insecure more generally, although in one instance security did prove protective with respect to the adverse effects of cumulative contextual risk. Findings are discussed in terms of risk and resilience and in light of the probabilistic nature of the relation between early attachment and later development.
Probability of error for diversity combining in DS CDMA systems with synchronization errors

An efficient series that is used to calculate the probability of error for a BPSK modulated DS CDMA system with chip timing and carrier phase errors in a slowly fading, multipath channel is derived. The receiver is assumed to be a coherent RAKE receiver. Three types of diversity schemes are considered: selection diversity, equal gain diversity combining and maximal ratio diversity combining. The error probability derivation does not resort to the widely used Gaussian approximation for the intersymbol interference and multiple access interference and is very accurate. The derived series for probability of error calculations is used to assess the reduction in the system capacity due to different levels of synchronization errors. For all three diversity combining schemes considered, the degradation in the system performance is expressed as an effective reduction in the system processing gain. Systems of 1.25 MHz, 5 MHz and 10 MHz are considered for different number of diversity branches and it is shown that the percentage reduction in the system capacity due to synchronization errors is approximately the same for all these systems.