Miracle-dz/UniFAR-FTUs huggingface dataset:
Applications of Large Random Matrices in Communications Engineering

This work gives an overview of analytic tools for the design, analysis, and modelling of communication systems which can be described by linear vector channels such as y = Hx+z where the number of components in each vector is large. Tools from probability theory, operator algebra, and statistical physics are reviewed. The survey of analytical tools is complemented by examples of applications in communications engineering. Asymptotic eigenvalue distributions of many classes of random matrices are given. The treatment includes the problem of moments and the introduction of the Stieltjes transform. Free probability theory, which evolved from non-commutative operator algebras, is explained from a probabilistic point of view in order to better fit the engineering community. For that purpose freeness is defined without reference to non-commutative algebras. The treatment includes additive and multiplicative free convolution, the R-transform, the S-transform, and the free central limit theorem. The replica method developed in statistical physics for the purpose of analyzing spin glasses is reviewed from the viewpoint of its applications in communications engineering. Correspondences between free energy and mutual information as well as energy functions and detector metrics are established. These analytic tools are applied to the design and the analysis of linear multiuser detectors, the modelling of scattering in communication channels with dual antennas arrays, and the analysis of optimal detection for communication via code-division multiple-access and/or dual antenna array channels.
Determinants of Sensitization of Carotid Baroreceptors by Pulsatile Pressure in Dogs

The threshold pressure of single baroreceptor units is decreased after compared with before exposure to pulsatile pressure according to previous studies in our laboratory. The purpose of the present study is to characterize the determinants of sensitization of arterial baroreceptors by pulsatile pressure. Carotid sinus nerve activity was recorded in dogs anesthetized with chloralose. Two indexes of baroreceptor "sensitivity" were obtained by comparing nerve activity before and immediately after exposure of the isolated carotid sinus to pulsatile pressure for periods up to 10 minutes. Sensitization occurred 1) when the threshold pressure of single baroreceptor units determined with a slow nonpulsatile ramp decreased after as compared with before pulsing and 2) when multiple unit activity increased after as compared with before pulsing at various mean levels of static pressure. Sensitization was evident after pulsing at mean pressures of 50 and 100 mm Hg, but not at 150 and 200 mm Hg, and was caused by the pulsatile change in diameter or deformation and not by the pulsatile change in wall tension. The magnitude of the effect was directly related to the duration of the pulsing period and to the frequency and amplitude of the pressure pulses. The sensitization could not be explained by increased diameter (sonomicrometers) or strain of the carotid sinus at the same pressure after pulsing; thus, there was an increase in "strain sensitivity" that outlasted the period of pulsing by up to several minutes. In most experiments the shift from static to pulsatile pressure at 50 and 100 mm Hg caused an increase in nerve activity, yet sensitization occurred after pulsing when one would have expected postexcitatory hyperpolarization or depression of activity upon return to static pressure. The sensitization was not caused by the release of prostacyclin from the endothelium since it was not reduced after endothelial denudation or inhibition of cyclooxygenase with indomethacin (30–80 μM) or ibuprofen (250 μM}. We speculate that sensitization of baroreceptors by pulsatile pressure may contribute to the decreased sympathetic activity after periods of elevated pulse pressure (e.g., after exercise). We also propose that the decreased sensitivity of baroreceptors after acute elevation of arterial pressure (acute resetting) may be offset in part by the sensitizing effect of increased pulsatile stretch.
Sleep Modulates the Neural Substrates of Both Spatial and Contextual Memory Consolidation

It is known that sleep reshapes the neural representations that subtend the memories acquired while navigating in a virtual environment. However, navigation is not process-pure, as manifold learning components contribute to performance, notably the spatial and contextual memory constituents. In this context, it remains unclear whether post-training sleep globally promotes consolidation of all of the memory components embedded in virtual navigation, or rather favors the development of specific representations. Here, we investigated the effect of post-training sleep on the neural substrates of the consolidation of spatial and contextual memories acquired while navigating in a complex 3D, naturalistic virtual town. Using fMRI, we mapped regional cerebral activity during various tasks designed to tap either the spatial or the contextual memory component, or both, 72 h after encoding with or without sleep deprivation during the first post-training night. Behavioral performance was not dependent upon post-training sleep deprivation, neither in a natural setting that engages both spatial and contextual memory processes nor when looking more specifically at each of these memory representations. At the neuronal level however, analyses that focused on contextual memory revealed distinct correlations between performance and neuronal activity in frontal areas associated with recollection processes after post-training sleep, and in the parahippocampal gyrus associated with familiarity processes in sleep-deprived participants. Likewise, efficient spatial memory was associated with posterior cortical activity after sleep whereas it correlated with parahippocampal/medial temporal activity after sleep deprivation. Finally, variations in place-finding efficiency in a natural setting encompassing spatial and contextual elements were associated with caudate activity after post-training sleep, suggesting the automation of navigation. These data indicate that post-training sleep modulates the neural substrates of the consolidation of both the spatial and contextual memories acquired during virtual navigation.
Summarizing customer review based on product feature and opinion

Opinion or sentiment analysis has risen to extract useful information from a lot of unstructured text data, in the form of customer reviews on different products and their features or online SNS data respectively. Customer reviews are not only helpful for potential customers, but also are helpful for the manufacturers of the products to raise their products and services. The reviews conciseness takes the attention of the customers rather than long reviews. Opinion Mining is playing a major role to summarize customer reviews and make it easy for online customers to determine whether to purchase the products or not. In this paper, we propose a supervised lazy learning model utilizing syntactic rules for the product features and opinion words extraction in subjective review sentences. In our lazy learning algorithm, i.e. K-NN with k=3 is used for the review sentences' classification into two classes (subjective, objective). Our experiment shows that proposed method can improve the performance of existing work in terms of average precision, recall and f-score for the extraction of opinion sentences and product features.
CHANGES IN SOCIAL MOBILITY IN HUNGARY DURING THE TRANSITION PERIOD

The paper analyzes social mobility data for Hungary from surveys conducted by the Hungarian Central Statistical Office in 1983, 1992 and 2000. The main focus is put on testing Treiman’s modernization hypothesis that was posed in 1970 and is still widely cited today in the context of transition. The fitted models are graphical models based on directed acyclic graphs and the values of marginal log-linear parameters (as proposed in Rudas and Bergsma 2004) are used to gain insight into the strength of associations. The main findings include that the process of status-attainment seems to be basically unchanged for women, but some of the Treiman-like associations move toward greater social closure. That is our findings do not support the hypothesis of a trend toward increasing social fluidity in Hungary between the early 1980s and 2000.
Findings at Helical CT–Enteroclysis in Symptomatic Patients With Crohn Disease: Correlation With Endoscopic and Surgical Findings

Purpose The purpose of our study was to assess the diagnostic potential of helical CT–enteroclysis (HCTE) and to correlate our findings to endoscopic and surgical results. Methods Twenty-eight consecutive patients suffering from histologic proven Crohn disease underwent HCTE and endoscopy within 4 weeks. HCTE findings were read by two observers in consensus and compared with endoscopic and surgical results. Results Morphological signs of an acute or recurrent bowel inflammation were found in 25 of 28 (89%) patients. HCTE demonstrated accurately all mural and extramural changes of the inflamed bowel walls. Moreover, in 18 of 25 (72%) patients, HCTE depicted additional pathologic changes such as fistulas, abscesses, and skip lesions, all of which could not be visualized by endoscopy. Conclusion HCTE is an accurate technique to detect mural and extramural abnormalities in patients with Crohn disease. HCTE should be considered as a complementary imaging method to endoscopy, and should be the first imaging method especially when Crohn-associated complications are suspected.
Self-Esteem and Self-Enhancement in Japan and America

Although the self-enhancement motive is commonly held to be a universal human motivation, some theorists have recently argued that it does not operate in Japan. In an attempt to shed light on this issue, the authors conducted an investigation that explored the relation between self-esteem and self-enhancement in Japan and America. In both cultures and to the same degree, high self-esteem people were more apt to display evidence of self-enhancement than were low self-esteem people. The correspondence between the two cultures suggests that the self-enhancement motive does operate in Japan.
Multinational corporations’ politics and resistance to plant shutdowns: A comparative case study in the south of France

MNCs’ politics has been considered a ‘contested terrain’ and further research is needed into the dynamics between the Head Office’s drastic restructuring decisions and local responses to understand how collective resistance is performed, and on what conditions. A neo-Gramscian approach is developed to analyse two plants in France facing drastic restructuring, including shutdown. We trace the dynamics of forces significant in aligning resisting subjects. We identify two structural processes – chains of equivalence and chains of difference – which were significant to the constitution of resistance. This article contributes to the development and refinement of a neo-Gramscian approach to management and organization studies in general and to multinational corporations’ politics in particular. It refines the study of multinational corporations’ politics by explaining how collective resistance is constituted and organized, what favours and limits the possibility of creating a collective antagonistic front and the role of local managerial resistance.
Using Technology in Gifted and Talented Education Classrooms: The Teachers' Perspective

Technology skills are assumed to be a necessity for college and career success, but technology is constantly evolving. Thus, development of students’ technology skills is an on-going and persistent issue. Standards from the Partnership for 21 st Century Skills and the International Society for Technology in Education encourage educators to teach skills that help students adapt to changing working environments. These skills resemble the National Association for Gifted Children’s program and teacher preparation standards. Descriptive research about what is already occurring in classrooms has been done, but the information is frequently limited to a list of activities. A qualitative multi-case phenomenological study of six Alabama teachers of the gifted examined how they use and shape technology experiences with students, and promote student learning of 21 st century skills. The teachers were chosen for the case study due to their reputation as teachers skilled in using technology with students. Lesson plans, interviews, and observations were used to discover themes between the teachers. Findings from the research indicate that educational technology use with students is shaped by factors such as teacher attitudes and expertise, available equipment and support, pedagogical decisions related to working with technology, and the particular student group participating in the technology use.
Fear of difference: ‘Space of risk’ and anxiety in violent settings

Yosef Jabareen ties fear to planning in his empirical research conducted in Israel/Palestine, offering scholarly research in planning an important concept that is termed a ‘space of risk’. Yet, Jabareen’s research fails to outline the key theoretical aspects of fear which underpin his concept. The importance of fear to planning practice lies in helping planning scholars, and in particular those conducting research in cases of violent conflict, to understand the complexity that underpins spaces of anxiety, risk and threat. Analysis in this article therefore attempts to further conceptualise fear in planning theory, building upon and complementing Jabareen’s conceptualisation of a ‘space of risk’. A fresh area for scholarly research in planning theory emerges that addresses the politics of fear and the impact that fear has on the production of spaces in violent settings.
The Early Lives of Highly Creative Persons: The Influence of the Complex Family

Over the last 50 years, theoretical, speculative, and empirical scholarship has examined the influence of early family context on subsequent accomplishments in children of high ability. Building upon 40 years of creativity literature focusing on optimal experience, this exploratory study applied the Complex Family Framework in a systematic analysis of creative adults' recollections of their early family lives. The study identifies evidence of the interplay of Integration and Differentiation, a catalyst for individual optimal experience, in the families of 9 creative exemplars who have made significant contributions to contemporary culture. Five participants represented the Arts and Humanities, three the Social Sciences, and one the Physical Sciences. The study demonstrates the utility of the Complex Family Framework in understanding families' contributions to children's later creative achievement.
Observability of Plant Metabolic Networks Is Reflected in the Correlation of Metabolic Profiles1

Correlations of metabolic profiles are reflected in the role of metabolites and describe the state of the entire metabolic network of Arabidopsis thaliana Understanding whether the functionality of a biological system can be characterized by measuring few selected components is key to targeted phenotyping techniques in systems biology. Methods from observability theory have proven useful in identifying sensor components that have to be measured to obtain information about the entire system. Yet, the extent to which the data profiles reflect the role of components in the observability of the system remains unexplored. Here we first identify the sensor metabolites in the model plant Arabidopsis (Arabidopsis thaliana) by employing state-of-the-art genome-scale metabolic networks. By using metabolic data profiles from a set of seven environmental perturbations as well as from natural variability, we demonstrate that the data profiles of sensor metabolites are more correlated than those of nonsensor metabolites. This pattern was confirmed with in silico generated metabolic profiles from a medium-size kinetic model of plant central carbon metabolism. Altogether, due to the small number of identified sensors, our study implies that targeted metabolite analyses may provide the vast majority of relevant information about plant metabolic systems.
Directed Differentiation of Patient-Specific Induced Pluripotent Stem Cells Identifies the Transcriptional Repression and Epigenetic Modification of NKX2-5, HAND1, and NOTCH1 in Hypoplastic Left Heart Syndrome

The genetic basis of hypoplastic left heart syndrome (HLHS) remains unknown, and the lack of animal models to reconstitute the cardiac maldevelopment has hampered the study of this disease. This study investigated the altered control of transcriptional and epigenetic programs that may affect the development of HLHS by using disease-specific induced pluripotent stem (iPS) cells. Cardiac progenitor cells (CPCs) were isolated from patients with congenital heart diseases to generate patient-specific iPS cells. Comparative gene expression analysis of HLHS- and biventricle (BV) heart-derived iPS cells was performed to dissect the complex genetic circuits that may promote the disease phenotype. Both HLHS- and BV heart-derived CPCs were reprogrammed to generate disease-specific iPS cells, which showed characteristic human embryonic stem cell signatures, expressed pluripotency markers, and could give rise to cardiomyocytes. However, HLHS-iPS cells exhibited lower cardiomyogenic differentiation potential than BV-iPS cells. Quantitative gene expression analysis demonstrated that HLHS-derived iPS cells showed transcriptional repression of NKX2-5, reduced levels of TBX2 and NOTCH/HEY signaling, and inhibited HAND1/2 transcripts compared with control cells. Although both HLHS-derived CPCs and iPS cells showed reduced SRE and TNNT2 transcriptional activation compared with BV-derived cells, co-transfection of NKX2-5, HAND1, and NOTCH1 into HLHS-derived cells resulted in synergistic restoration of these promoters activation. Notably, gain- and loss-of-function studies revealed that NKX2-5 had a predominant impact on NPPA transcriptional activation. Moreover, differentiated HLHS-derived iPS cells showed reduced H3K4 dimethylation as well as histone H3 acetylation but increased H3K27 trimethylation to inhibit transcriptional activation on the NKX2-5 promoter. These findings suggest that patient-specific iPS cells may provide molecular insights into complex transcriptional and epigenetic mechanisms, at least in part, through combinatorial expression of NKX2-5, HAND1, and NOTCH1 that coordinately contribute to cardiac malformations in HLHS.
Tracking multiple objects in urban traffic environments using dense stereo and optical flow

Stereo vision based sensors provide large amounts of data, a fact which is advantageous when trying to extract semantic information about the imaged scene. However, this data is corrupted by errors, caused especially by the uncertainties in the stereo reconstruction process. Temporal information can be used in order to minimize these errors. This paper presents an advanced object model, a novel association mechanism and the design of a Kalman filter based tracking algorithm, for tracking multiple objects, in complex, urban traffic scenarios.
Effective Curriculum‐Based Sex and STD/HIV Education Programs for Adolescents

ABSTRACT—High rates of teen pregnancy and sexually transmitted disease (STD) are important problems in the United States. Curriculum-based sex and STD/HIV education programs have been proffered as a partial solution. This article reviews evaluations of the impact of such programs that met specified criteria and finds that about two thirds of programs had a significant impact on behavior. The proportion having a negative impact was less than expected by chance. Those having a positive impact had such effects as delaying the initiation of sex, reducing the frequency of sex or the number of sexual partners, and increasing the use of condoms or other contraceptive methods. Positive findings were robust across different groups of youth and replication of programs in different locations. Programs with 17 specific characteristics were much more likely to be effective than programs without these characteristics. These programs alone cannot dramatically reduce teen pregnancy and STD, but they can contribute to the reduction of those problems.
Contexts of antonymous adjectives

ABSTRACT The method of sorting is used to compare sets of adjectival contexts. Contexts of directly antonymous adjectives are found to be highly discriminable, both with sentential and phrasal contexts. These results are used to argue that words with different meanings normally appear in discriminably different contexts, and that the cue for learning to associate direct antonyms is not their substitutability, but rather their relatively frequent co-occurrence in the same sentence.
Using arterial spin labelling to investigate spontaneous and evoked ongoing musculoskeletal pain

Clinical pain is difficult to study using standard Blood Oxygenation Level Dependent (BOLD) magnetic resonance imaging because it is often ongoing and, if evoked, it is associated with stimulus-correlated motion. Arterial spin labelling (ASL) offers an attractive alternative. This study used arm repositioning to evoke clinically-relevant musculoskeletal pain in patients with shoulder impingement syndrome. Fifty-five patients were scanned using a multi post-labelling delay pseudo-continuous ASL (pCASL) sequence, first with both arms along the body and then with the affected arm raised into a painful position. Twenty healthy volunteers were scanned as a control group. Arm repositioning resulted in increased perfusion in brain regions involved in sensory processing and movement integration, such as the contralateral primary motor and primary somatosensory cortex, mid- and posterior cingulate cortex, and, bilaterally, in the insular cortex/operculum, putamen, thalamus, midbrain and cerebellum. Perfusion in the thalamus, midbrain and cerebellum was larger in the patient group. Results of a post hoc analysis suggested that the observed perfusion changes were related to pain rather than arm repositioning. This study showed that ASL can be useful in research on clinical ongoing musculoskeletal pain but the technique is not sensitive enough to detect small differences in perfusion.
Cognitive Endophenotypes of Dyslexia

The study investigated cognitive deficits associated with dyslexia and familial risk of dyslexia (endophenotypes) by comparing children from families with and without a history of dyslexia. Eighty-eight school-aged children were assessed on measures of phonology, language and rapid automatized naming. A series of regression analyses with family risk and dyslexia status as predictors indicated that word recall, morphology, and rapid automatized naming were associated with the deficit, whereas the two phonological measures (phoneme awareness and nonword repetition) were associated with both literacy deficits and family risk, suggesting that the phonological deficit is an endophenotype of dyslexia. Whereas the association with familial risk was similar for the two phonological measures, they differed in their relation to dyslexia status: Phoneme awareness showed a stronger association with dyslexia than risk status, whereas nonword repetition was more strongly related to the risk. The data are interpreted within the framework of multiple deficit models of dyslexia.