Miracle-dz/UniFAR-FTUs huggingface dataset:
Adaptive backoff mechanism for OFDMA random access with finite service period in IEEE802.11ax

In next generation wireless LAN standard which is called IEEE802.11ax, Orthogonal Frequency Division Multiple Access (OFDMA) random access has been adopted as an uplink multi-user transmission technology. In this paper, we propose an adaptive backoff algorithm for OFDMA random access. Due to the finite service period defined by the standard, random access OFDMA sessions are discontinuous in time which may result in performance degradation when naive implementations are performed. Via computer simulations, we show that near maximum throughput is consistently achieved even in the case of dense environment. In addition, we explain a method for accurately estimating the number of OFDMA random access users, a key parameter in the proposed adaptive method.
Class Size and Determinants of Learning Effectiveness.

MFOI/PCO2 Plus Postage. *Academic Achievement; *Class Size; *College Students; Comparative Analysis; *Economics; Females; Higher Education; High Schools; *Learning; Males; Questionnaires; Regression (Statistics); *Sex Differences Based on the comparison of a regular-sized (n=25) and an oversized (n=54) class of college students taught by the same instructor, significant superior performance was found in favor of the large class. This disparity persisted even when a switching regression model (with endogenous switching) was performed. Only 39% of the learning disparity can be explained by characteristics of the student, including a 29.5% performance gap that is attributed to the potential "overachiever" trait of small class students. In addition, it was found that overall grade point average and performances in previous college economics courses did not have any significant impact on the students' current scores. Contrary to most of the findings in recent literature, high school economic education did not have any positive impact on the students' performance. In fact, it had a slightly negative effect. No evidence of gender difference was found for the large class, but a fairly significant lower performance was found for females in the small class. The student questionnaire is attached. Three tables are included. (Contains 28 references.) (Author/SLD) *********************************************************************** Reproductions supplied by EDRS are the best that can be made * from the original document. *********************************************************************** U S. IMPARTMENT OF EDUCATION Once of Educatfonal Research and Improvement EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC, ms document has been reproduced as received from. the person or copanIzahon ortpinatmg It C Minor Changes havt bean made to improve reproduction Quakily Points of .0,ev. or Opint OnS stated ,n th.1d0Cv mesh do nol necessarily represent otfic.al OE RI posmon or oollCy "PERMISSION TO REPRODUCE THIS MATERIAL HAS BEEN GRANTED BY TO THE EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC). " Class Size and Determinants of Learning Effectiveness
Social Support as a Neglected E-Learning Motivator Affecting Trainee's Decisions of Continuous Intentions of Usage.

Drawing from the social influence theory and acknowledging that the others’ support within the work context affects employees’ learning, values, and behaviours, an alternative framework was proposed to explain employees’ learning satisfaction and future intention to participate in e-training programs in the current study. 578 survey data collected from employees of various corporations in Taiwan provide empirical support for our extended model. The results suggest that social support from peers and supervisors, a usually neglected factor, has significant effect on trainees’ learning satisfaction, while family support, an often neglected antecedent of e-learning choice, was surprisingly found to affect trainees’ continuous intentions to participate. Finally, the paper concludes with the importance of employees’ perceptions of social support in terms of organisational training. The impact of human resource management policies is also discussed.
Robust MIMO-OFDM design for CMMB systems based on LMMSE channel estimation

Employing MIMO-OFDM architecture in the next generation of CMMB systems offers the potential to obtain higher spectral efficiency as well as diversity gain. In particular, a low-complexity effective strategy for transmission scheme based on parallel SFBC design is realized, while the data rate is the same as the traditional SFBC system. At the receiver, the time-frequency joint LMMSE wiener filtering channel estimation is proposed to accurately track the MIMO channel variation, whereby time-domain synchronizing signal is used for path delays estimation, while the MIMO path gains are acquired by the differential pilots without interference cancellation. Finally, the simulation results demonstrate the performance advantages of the proposed robust design.
Principled workflow-centric tracing of distributed systems

Workflow-centric tracing captures the workflow of causally-related events (e.g., work done to process a request) within and among the components of a distributed system. As distributed systems grow in scale and complexity, such tracing is becoming a critical tool for understanding distributed system behavior. Yet, there is a fundamental lack of clarity about how such infrastructures should be designed to provide maximum benefit for important management tasks, such as resource accounting and diagnosis. Without research into this important issue, there is a danger that workflow-centric tracing will not reach its full potential. To help, this paper distills the design space of workflow-centric tracing and describes key design choices that can help or hinder a tracing infrastructures utility for important tasks. Our design space and the design choices we suggest are based on our experiences developing several previous workflow-centric tracing infrastructures.
Comparative performance of backpropagation networks designed by genetic algorithms and heuristics

The design of neural network models involves numerous complexities, including the determination of input vectors, choosing the number of hidden layers and their computational units, and specifying activation functions for the latter. The combinatoric possibilities are daunting, yet experience has yielded informal guidelines that can be useful. Alternatively, current research on genetic algorithms (GA) suggests that they might be of practical use as a formal method of determining ‘good’ architectures for neural networks. In this paper, we use a genetic algorithm to find effective architectures for backpropagation neural networks (BP). We compare the performance of heuristically designed BP networks with that of GA-designed BP networks. Our test domains are sets of problems having compensatory, conjunctive, and mixed-decision structures. The results of our experiment suggest that heuristic methods produce architectures that are simpler and yet perform comparatively well.  1998 John Wiley & Sons, Ltd.
Le deuil dans les sciences de l’organisation : éléments d’analyse critique d’un transfert conceptuel

Dans les sciences organisationnelles, de nombreux travaux utilisent, ou simplement evoquent, la notion de deuil pour donner un sens aux reactions « emotionnelles » particulierement intenses de certains acteurs confrontes a des pertes dans leur champ professionnel. L’objet de cet article est de questionner les fondements theoriques et epistemologiques qui entourent la legitimite de l’analogie induite par ce transfert conceptuel et les limites de sa validite dans les pratiques empiriques de la recherche scientifique. La premiere partie de cet article s’attachera a reperer et categoriser les travaux mobilisant ce concept dans les sciences organisationnelles. Le second visera a definir les contours de la notion de deuil et les exigences theoriques que cette definition impose au chercheur en gestion. La troisieme partie visera a montrer la diversite des theories qui la compose et les difficultes posees par cet eclectisme dans l’usage gestionnaire du deuil. Enfin, nous chercherons, dans la quatrieme partie, a marquer les limites theoriques des modeles des stades qui restent l’organisateur theorique le plus mobilise dans notre discipline.
Testing distributional assumptions in psychometric measurement models with substantive applications in psychology

Bij psychologisch onderzoek worden tests en vragenlijsten afgenomen waarmee psychologische constructen (persoonseigenschappen die niet direct zichtbaar zijn) zoals intelligentie en extraversie kunnen worden gemeten. Deze metingen zijn nooit helemaal zuiver, doordat bij het antwoorden talloze andere persoonlijke factoren een rol spelen (bijvoorbeeld gemoedstoestand of koffieconsumptie). Deze ‘ruisfactoren’ zorgen voor meetfouten bij het meten van psychologische constructen. Dylan Molenaar onderzocht of bij mensen die verschillen op een psychologisch construct, eenzelfde hoeveelheid meetfouten wordt gemaakt bij het afnemen van de test. Hij bestudeerde hiertoe verschillende constructen, waaronder de persoonlijkheidstrek alexithymie (het onvermogen om emoties onder woorden te brengen). Uit zijn resultaten blijkt dat bij mensen die laag-alexithym zijn een grotere meetfout wordt gemaakt dan bij mensen die hoog-alexithym zijn. Dit heeft als consequentie dat de alexithymiescores een hogere betrouwbaarheid hebben naarmate een respondent hoger scoort op de vragenlijst.
Refining psychiatric genetics: from ‘mouse psychiatry’ to understanding complex human disorders

Investigating the pathogenesis of psychiatric disorders is a complicated and rigorous task for psychiatric geneticists, as the disorders often involve combinations of genetic, behavioral, personality, and environmental factors. To nurture further progress in this field, a new set of conceptual tools is needed in addition to the currently accepted approaches. Concepts that consider cross-species trait genetics and the interplay between the domains of disorders, as well as the full spectrum of potential symptoms and their place along the pathogenetic continuum, are particularly important to address these needs. Here, we outline recent concepts and approaches that can help refine the field and enable more precise dissection of the genetic mechanisms contributing to psychiatric disorders.
Building a research agenda on water policy: an exploration of the Water Framework Directive as an interdisciplinary problem

Abstract Under the European Union Water Framework Directive, Europe's water bodies must be managed in an integrated and sustainable manner, taking account of stakeholder views, and are required to achieve 'good status' by 2015. This policy represents a shift in approach to the management of the environment and raises multiple questions about the relationship between policy-making, policy implementation, and the research base informing policy work. Specifically, it prompts questions about existing approaches to the study of environment and society, and how natural and social scientists should work together. Here we review some of these questions, and explore a specific response to them in the formation of a cross-disciplinary research network. We conclude the paper by outlining potential ways forward to understanding the layered challenges presented by the need for sustainable water management.
Capital social entre empresas familiares y asociaciones empresariales en Celaya, Guanajuato

This work is part of a comprehensive study on family businesses held in Celaya, Guanajuato Mexico (year 2011) with a sample of 343 interviews with owners or managers responsible. This study examines the specific relationship capital with family businesses with various business associations, as is supposedly the social purpose of these associations. The analysis is based on the open question: Does your business communication with business associations (CCE, COPARMEX, CANACINTRA .) and how they perceive the relationship (positive and / or negative)? With it, you want to know what they think micro, small and medium-sized family relationships If there are business associations? , Who or who have such relationships? And do you think of these relationships? The analysis is based primarily on social capital theory of Bourdieu. The study is mixed, predominantly qualitative and exploratory. An analysis of the various testimonies to quantify and represent the descriptive factors of these relationships.
The Enhancement of Learning in Public Sector Training Programs

This article attempts to build on recent work on individual learning differences by discussing several psychological learning models and their importance to training in public agencies. The article first presents several ideas on the concept of learning along with accepted principles of learning. The article then addresses the question of “How do people learn? ” and offers the views of Dewey, Kolb, and others on learning and thinking styles as frameworks for increasing our understanding of the learning process and enhancing training in public agencies. Finally, potential applications of learning and thinking styles information are presented to summarize the ideas presented in the article.
A DUAL-SYSTEMS APPROACH FOR UNDERSTANDING DIFFERENTIAL SUSCEPTIBILITY TO PROCESSES OF PEER INFLUENCE†

The distinct peer-based perspectives of deviant normative influence and unstructured/unsupervised socializing with friends contend that adolescents rely on different information when deciding to offend, with the former positing that individuals offend after considering the longer term consequences of behavior, and the latter positing that decisions to offend derive from situational stimuli. We argue that these processes can be organized under a dual-systems framework of decision making, which leads to the hypothesis that individuals at the edges of impulsivity should be differentially vulnerable to these peer influence processes because of their tendency to rely on only one system of decision making. We use two large data sets to test this hypothesis: a nationally representative sample of adolescents from the AddHealth study (N = ∼9,000) and a pooled panel data set of adolescents from the Gang Resistance Education and Training (G.R.E.A.T.) evaluation (N = 1,172). The results of longitudinal negative binomial analyses indicate that normative influence by deviant peers has a stronger effect on delinquency for adolescents with low impulsivity than it does for individuals with high impulsivity. Differences in the informal socializing with peers coefficients are less clear and offer minimal support for our predictions.
Neural Network Analysis of the Mastoid EEG for the Assessment of Vigilance

This article is concerned with the analysis of the mastoid electroencephalogram (EEG) using parametric modeling and neural network techniques to assess the vigilance of an individual. One possible application of this work would be the design of a monitoring system for tracking the transitions within the vigilance continuum. The strategy presented consists of training neural networks with spectral features extracted from the mastoid EEG. The results are validated against the expert scoring of the vigilance level performed by visual inspection of the central EEG, electrooculographic (EOG), and electromyography (EMG) signals, and against the results obtained by training similar networks with information extracted from the central EEG (widely recognized as providing useful information for vigilance level assessment). To improve the performance of the neural networks, a Kohonen map-based technique for filtering the training data is proposed (this allows labels assigned by an expert to 15-sec epochs to be transcripted reliably to 1-sec segments). The results presented demonstrate conclusively that the tracking of fluctuations from alertness to drowsiness within the vigilance continuum is possible by neural network analysis of a single channel of EEG recorded from the mastoid site.
Consideration of Cardia Preserving Proximal Gastrectomy in Early Gastric Cancer of Upper Body for Prevention of Gastroesophageal Reflux Disease and Stenosis of Anastomosis Site

Purpose The aim of this study is to evaluate the feasibility and safety of cardia preserving proximal gastrectomy, in early gastric cancer of the upper third. Materials and Methods A total of 10 patients were diagnosed with early gastric cancer of the upper third through endoscopic biopsy. The operation time, length of resection free margin, number of resected lymph nodes and postoperative complications, gastrointestinal symptoms, nutritional status, anastomotic stricture, and recurrence were examined. Results There were 5 males and 5 females. The mean age was 56.5±0.5 years. The mean operation time was 188.5±0.5 minutes (laparoscopic operation was 270 minutes). Nine patients were T1 stage (T2 : 1), and N stage was all N0. The mean number of resected lymph nodes was 25.2±0.5. The length of proximal resection free margin was 3.1±0.1 cm and distal was 3.7±0.1 cm. Early complications were surgical site infection (1), bleeding (1), and gastro-esophageal reflux disease (1) (this symptom was improved with medication). Late complications were dyspepsia (3) (this symptom was improved without any treatment), and others were nonspecific results of endoscopy or symptom. Conclusions Cardia preserving proximal gastrectomy was feasible for early gastric cancer of the upper third. Further evaluation and prospective research will be required.
TEORIAS DA SEMIÓTICA E CULTURA ORGANIZACIONAL: ESTUDO EM UMA INSTITUIÇÃO MILITAR DO EXÉRCITO BRASILEIRO

Resumo Buscou-se neste artigo, a partir de teorias da semiotica e de percepcoes dos integrantes de uma organizacao militar, valores organizacionais e culturais que orientam o comportamento cotidiano da organizacao. O estudo teve um delineamento qualiquantitativo (misto) e utilizou um instrumento de pesquisa ja validado por estudos anteriores (Escala de Valores Organizacionais – EVO), porem, adaptado e orientado por meio de teorias da semiotica. O locus da pesquisa empirica foi uma Organizacao Militar do Exercito Brasileiro e os resultados evidenciaram, segundo o universo simbolico dos seus integrantes, um conjunto de valores que sinalizam o comportamento e a cultura organizacional desta importante instituicao nacional. Palavras-Chave: Teorias da semiotica; Valores e cultura organizacionais. SEMIOTIC AND THEORIES OF ORGANIZATIONAL CULTURE: A STUDY IN A MILITARY INSTITUTION OF BRAZILIAN ARMY ABSTRACT This Article is to demonstrate, from the theories of semiotic and from members’ perceptions of a military organization, organizational and cultural values that guide the daily behavior of the organization. The study had a (mixed) quality and quantitative design and using a research tool for already validated by previous studies (Scale Organizational Values - SOV), however, adapted and directed by theories from the semiotics. The locus of the empirical research was a military organization of the Brazilian Army and theresults showed, in the symbolic universe of its members, a set of values that indicate the behavior and organizational culture of this important national institution. Keywords: Theory of semiotics; Values and organizational culture
Specific CD8+ response discriminates presumed Epstein-Barr virus-related hepatitis and non-alcoholic fatty liver

TO THE EDITOR: Chronic liver injury in immunocompetent patients is rarely related to Epstein-Barr virus (EBV) and no standard diagnostic criteria for EBV hepatitis are available. Non-alcoholic fatty liver disease (NAFLD) is a common condition comprising a wide spectrum of liver damage, and is strongly associated with type 2 diabetes, obesity and hyperlipidaemia. EBV reactivation has not been correlated to any disease in immunocompetent individuals so far, though it is a common phenomenon and has recently been tentatively linked to chronic hepatitis [1,2]. Although immunofluorescence serology diagnosis is still the gold standard, it reveals reactivation only retrospectively [3]. Labelling liver disease as EBVassociated is hindered more by lack of validated diagnostic tools. CD38 quantification could be helpful in the differential diagnostics of EBV infection [4]. As described elsewhere, the percentage of CD38-expressing cells among total CD8 T cells was found to correlate significantly with viral load. A strong correlation was also found between viral load and the frequency of CD38 CD8 EBV-specific T cells [5].
Non-Fragile Controllers for a Class of Time-Delay Nonlinear Systems

Abstract The paper presents the complexity–reduced non-fragile state controller design for a class of continuous–time nonlinear delayed symmetric composite systems. Additive controller gain perturbations are considered. Both subsystems and interconnections include time–delays. A low-order control design system is constructed first. Then, stabilizing controllers with norm bounded gain uncertainties are designed for the control design system using linear matrix inequalities (LMIs) for the delay-independent stability. Main result shows that when such non-fragile low–order controllers are implemented into each local controller of the decentralized controller for the global system, then the global closed–loop systems are globally asymptotically stable.
Management of complex perianal Crohn’s disease

Patients with Crohn’s disease often develop perianal disease, successfully managed in most cases. However, its most aggressive form, complex perianal disease, is associated with high morbidity and a significant impairment in patients’ quality of life. The aim of this review is to provide an updated approach to this condition, reviewing aspects of its epidemiology, diagnosis and therapeutic alternatives. Emerging treatment options are also discussed. A multidisciplinary assessment of these patients with a coordinated medical and surgical approach is crucial.
Characterization of Epstein–Barr virus (EBV)‐infected natural killer (NK) cell proliferation in patients with severe mosquito allergy; establishment of an IL‐2‐dependent NK‐like cell line

The clinical evidence of a relationship between severe hypersensitivity to mosquito bite (HMB) and clonal expansion of EBV‐infected NK cells has been accumulated. In order to clarify the mechanism of EBV‐induced NK cell proliferation and its relationship with high incidence of leukaemias or lymphomas in HMB patients, we studied clonally expanded NK cells from three HMB patients and succeeded in establishing an EBV‐infected NK‐like cell line designated KAI3. Immunoblotting and reverse transcriptase‐polymerase chain reaction (RT‐PCR) analyses revealed that KAI3 cells as well as infected NK cells exhibited an EBV latent infection type II, where EBV gene expression was limited to EBNA 1 and LMP1. As KAI3 was established by culture with IL‐2, IL‐2 responsiveness of peripheral blood NK cells from patients was examined. The results represented markedly augmented IL‐2‐induced IL‐2Rα expression in NK cells. This characteristic property may contribute to the persistent expansion of infected NK cells. However, KAI3 cells as well as the NK cells from patients were not protected from apoptosis induced by either an anti‐Fas antibody or NK‐sensitive K562 cells. Preserved sensitivity to apoptosis might explain the relatively regulated NK cell numbers in the peripheral blood of the patients. To our knowledge, KAI3 is the first reported NK‐like cell line established from patients of severe chronic active EBV infection (SCAEBV) before the onset of leukaemias or lymphomas. KAI3 cells will contribute to the study of EBV persistency in the NK cell environment and its relationship with high incidence of leukaemias or lymphomas in HMB patients.