Miracle-dz/UniFAR-FTUs huggingface dataset:
Compute-and-forward for two-way relay

In this paper, compute-and-forward physical layer network coding (PNC) scheme is investigated for wireless two-way relay channel. The achievable rates are reviewed both for AWGN channel and fading channel. New transmit schemes by using channel inversion precoding are proposed over fading channel to achieve much higher rates. It is revealed that with the proposed channel aware precoding scheme, the performance of compute-and-forward improves enormously. For two-way relay channel, compute-and-forward can achieve the maximum degree of freedom (DoF) of 2 without the limitation of Diophantine tradeoff, which indicates that compute-and-forward is the most suitable relaying scheme for two-way relay channel.
Quality of life in patients with visual impairment in Ibadan: a clinical study in primary care

Background Visual function is important for optimal orientation in functional and social life, and has an effect on physical and emotional well-being. Visual impairment, therefore, leads to restrictions in all aspects of daily living and is related to quality of life. The aim of this study was to provide information on the causes of visual impairment in patients presenting to their family physician, the spectrum of impairment, and its impact on quality of life for these patients. Methods This descriptive cross-sectional study of 375 adult patients with ocular symptoms was performed in the general outpatient department of the University College Hospital, Ibadan, from July to September, 2009. After checking their presenting visual acuity, the patients were interviewed using the Vision-Related Quality of Life questionnaire to determine the impact of visual impairment on their quality of life. Ophthalmic examinations were performed to determine the causes of visual impairment. The results were analyzed using proportions and percentages. Results The main causes of visual impairment were cataracts (58.7%), refractive error (19.4%), and glaucoma (2.9%). Visual impairment was found to be associated with advancing age, low education, and unemployment (P<0.001). Most patients (85.1%) were found to have good quality of life overall. Quality of life was found to be poor in the domains of visual function (64.2%) and social interaction (50.9%). Quality of life was found to be related to the degree of visual impairment, ie, blind patients reported poor quality of life (41.4%) when compared with those having low vision (8.6%) or near normal vision (2.4%, P<0.001). Conclusion This study identified poor quality of life in patients with a higher degree of visual impairment. Family physicians need to identify these visually impaired patients early and make timely referrals.
Median filtering‐based methods for static background extraction from surveillance video

We propose some computational methods for extracting static backgrounds from surveillance videos corrupted by noise, blur, or both. The new methods are constructed based on the fact that the matrix representation of a static background consists of identical columns; hence the idea of median filtering is embedded in these methods. These new methods significantly differ from existing methods originating from the robust principal component analysis (RPCA) in that no nuclear‐norm term is involved; thus the computation of singular value decomposition can be completely avoided when solving these new models iteratively. This is an important feature because usually the dimensionality of a surveillance video is large and so the involved singular value decomposition (which is inevitable for RPCA‐based models) is very expensive computationally. We show that these methods can be easily solved by well‐developed operator splitting methods in optimization literature such as the alternating direction method of multipliers. We compare the new methods with their RPCA‐based counterparts via testing some synthetic and real videos. Our numerical results show that compared with RPCA‐based models, these median filtering‐based vaiational models can extract more accurate backgrounds when the background in a surveillance video is static, and numerically, they can be solved much more efficiently. Copyright © 2015 John Wiley & Sons, Ltd.
Interventions de formation parentale pour les enfants d'âge préscolaire

Introduction Il y a de plus en plus de donnees sur le role important des facteurs de risques familiaux qui facilitent la participation et la progression des jeunes enfants a la trajectoire des « debutants precoces » en matiere de troubles de conduite. Cette trajectoire se caracterise par trois elements : l’apparition des troubles de conduite (comme les niveaux developpementaux excessifs d’agressivite, un refus d’obeissance et autres comportements oppositionnels) a l’âge prescolaire et au debut de l’âge scolaire; un degre eleve de continuite pendant l’enfance, l’adolescence et l’âge adulte, et un mauvais pronostic.
Graphic Requirements for Multistationarity

We discuss properties which must be satisfied by a genetic network in order for it to allow differentiation. These conditions are expressed as follows in mathematical terms. Let F be a differentiable mapping from a finite dimensional real vector space to itself. The signs of the entries of the Jacobian matrix of F at a given point a define an interaction graph, i.e. a finite oriented finite graph G(a) where each edge is equipped with a sign. René Thomas conjectured 20 years ago that if F has at least two nondegenerate zeroes, there exists a such that G(a) contains a positive circuit. Different authors proved this in special cases, and we give here a general proof of the conjecture. In particular, in this way we get a necessary condition for genetic networks to lead to multistationarity, and therefore to differentiation. We use for our proof the mathematical literature on global univalence, and we show how to derive from it several variants of Thomas rule, some of which had been anticipated by Kaufman and Thomas.
Evolving role of MRI in Crohn's disease

MR enterography is playing an evolving role in the evaluation of small bowel Crohn's disease (CD). Standard MR enterography includes a combination of rapidly acquired T2 sequence, balanced steady‐state acquisition, and contrast enhanced T1‐weighted gradient echo sequence. The diagnostic performance of these sequences has been shown to be comparable, and in some respects superior, to other small bowel imaging modalities. The findings of CD on MR enterography have been well described in the literature. New and emerging techniques such as diffusion‐weighted imaging (DWI), dynamic contrast enhanced MRI (DCE‐MRI), cinematography, and magnetization transfer, may lead to improved accuracy in characterizing the disease. These advanced techniques can provide quantitative parameters that may prove to be useful in assessing disease activity, severity, and response to treatment. In the future, MR enterography may play an increasing role in management decisions for patients with small bowel CD; however, larger studies are needed to validate these emerging MRI parameters as imaging biomarkers. J. Magn. Reson. Imaging 2013;37:1277–1289. © 2013 Wiley Periodicals, Inc.
Time dependent ionization calculations of gaseous nebulae

We developed a new computer code which is able to treat the time dependent photo- and collisional ionization of gaseous nebulae together with the consistent energy balance for arbitrary numbers of elements, ions and line transitions. The in- tention of this paper is to describe the basic numerical methods andafewtestcalculationsasbeingpartsoffullsphericallysym- metricradiation-gasdynamiccomputationsinthelimitofanon- moving gas (v(r)=0). Exemplarily we discuss the evolution of ionization fronts around a suddenly switched-on/switched-off central star with Teff =50000K and L? =6000L. Evidence is presented that the photon velocities must articially be limited in time dependent astrophysical calculations when the equation ofradiativetransferisnotexplicitelytreatedinatimedependent way. Furthermore, computations with different spatial resolu- tions demonstrate that a careful choice of the grid resolution in ionization calculations is essential for the interpretation of observed line intensities. Frank&Mellemaincludedthetimedependentequationsofion- ization for hydrogen and helium and assumed ionization equi- librium for carbon, nitrogen and oxygen in their models. While the time dependent treatment of hydrogen and helium has been shown to be essential for PN dynamics by Schmidt-Voigt & K¨ oppen (1987) and Marten & Sch¨ (1991), the assump- tion of ionization equilibrium for metals may be correct during most evolutionary phases of a typical PN, but may lead to a signicant loss of accuracy in regions where the time scales of changes in the local radiation eld become comparable to ion- ization/recombinationtime-scales.Duetotherestrictednumber ofelementsandionizationstagesconsidered,Frank&Mellema (1994) used two different approaches for the cooling function, at electron temperatures below and above 10 5 K, in order to get an overall cooling function correct to a rst approximation.
T lymphocyte infiltration in non-rheumatic aortic stenosis: a comparative descriptive study between tricuspid and bicuspid aortic valves

Background: The two most common causes of aortic stenosis are primary “degenerative” calcification of tricuspid aortic valves and secondary calcification of congenital bicuspid valves. T lymphocyte infiltration occurs in stenotic tricuspid aortic valves, indicating an inflammatory component, but it has not been shown whether it also occurs in stenotic bicuspid valves. Objective: To compare non-rheumatic tricuspid and bicuspid stenotic aortic valves for the presence and distribution of T lymphocytes. Setting: University hospital. Patients and design: Valve specimens were obtained from 29 patients (15 women, 14 men, mean age 69 years (range 52–81 years)), referred to the hospital for aortic valve replacement because of symptomatic aortic valve stenosis. There were 17 tricuspid valves (from 10 women and seven men, mean age 71 years) and 12 bicuspid valves (from five women and seven men, mean age 67 years). To identify mononuclear inflammatory cells, sections were stained with antibodies for CD3 (pan-T cell antigen, Dako 1:400) and then graded histologically according to the degree of T cell infiltrate. Results: T lymphocyte infiltration was present in both tricuspid and bicuspid stenotic aortic valves, without any significant differences in extent or localisation. Conclusions: Stenotic bicuspid aortic valves show the same degree of T lymphocyte infiltration as degenerative tricuspid aortic valves. Inflammation needs to be considered in the pathogenesis of acquired aortic stenosis, irrespective of the primary valve anomaly.
An interactive web-based curriculum on evidence-based medicine: design and effectiveness.

BACKGROUND AND OBJECTIVES Medical education experts have called for improved training in evidence-based medicine (EBM) and the increased use of e-learning technologies in medical education. In response, we developed an interactive, Web-based curriculum on key aspects of EBM in family medicine. METHODS Students participating in a 6-week family medicine clerkship (n=238) were randomly assigned to intervention (n=134) or control (n=104) groups. Both groups participated in the traditional clerkship experience, but intervention group students received additional training via an on-line curriculum that included learning modules in MEDLINE searching skills, EBM skills, and the calculation of the number needed to treat (NNT) statistic. The on-line curriculum was evaluated using a case-control design with a test case at the clerkship's end. RESULTS Results suggested that the on-line curriculum was effective, with experimental group students outperforming control group participants on a variety of measures, including the number of MEDLINE searches conducted during the clerkship (13 searches versus 3 searches) and the quality of literature search strategies on an evaluation patient case study (2.9 versus 2.1 on a 1=poor to 4=excellent scale). Intervention group students reported greater confidence and enjoyment in searching the biomedical journal literature via MEDLINE and were more likely to identify the best articles (randomized controlled trials or meta-analyses) for the evaluation case from among those retrieved (60% versus 34%). In addition, intervention group students' abilities to correctly calculate the NNT were significantly higher than those of control group participants (73% versus 27%). Intervention group students were more likely than control subjects to report learning from other students during the clerkship. CONCLUSIONS This study demonstrates that an e-learning approach to educating medical students to effectively search MEDLINE for articles meeting the criteria for evidence-based practice can result in higher-quality literature search strategies, identification of higher-quality evidence, and improved confidence in information retrieval and analysis skills.
Control Knowledge in Planning: Benefits and Tradeoffs

Recent new planning paradigms, such as Graphplan and Satplan, have been shown to outperform more traditional domain-independent planners. An interesting aspect of these planners is that they do not incorporate domain specific control knowledge, but instead rely on efficient graph-based or propositional representations and advanced search techniques. An alternative approach has been proposed in the TLPlan system. TLPlan is an example of a powerful planner incorporating declarative control specified in temporal logic formulas. We show how these control rules can be parsed into Satplan. Our empirical results show up to an order of magnitude speed up. We also provide a detailed comparison with TLPlan, and show how the search strategies in TLPlan lead to efficient plans in terms of the number of actions but with little or no parallelism. The Satplan and Graphplan formalisms on the other hand do find highly parallel plans, but are less effective in sequential domains. Our results enhance our understanding of the various tradeoffs in planning technology, and extend earlier work on control knowledge in the Satplan framework by Ernst et al. (1997) and Kautz and Selman (1998).
The influences of system quality and service quality to consumer satisfaction and loyalty in on-line game industry

Recently, Taiwan's sales revenue of online games market is rapidly growing year on year. As the internet pervasive, more and more company joined to this market and tries to gain profit in this market. However, the key to success in this market is consumer satisfaction and loyalty. As a result, based on literature, the research proposed two variables (system quality and service quality) which may influences consumer satisfaction and loyalty in online game market. The research used quantitative research method, and the questionnaire was used to collect research data. The result of the study indicated that the in-time service was the factor that influences customer repurchases intention. The system security will influence the intention to recommend the game to others. Moreover, the service quality and system quality will influence the consumer satisfaction to the game. Surprisingly, there is no significant relationship between consumer satisfaction and loyalty in online game industry.
An efficient nanoscale heterogeneous catalyst for the capture and conversion of carbon dioxide at ambient pressure.

Silver nanoparticles were successfully supported on the zeolite-type metal-organic framework MIL-101 to yield Ag@MIL-101 by a simple liquid impregnation method. For the first time, the conversion of terminal alkynes into propiolic acids with CO2 was achieved by the use of the Ag@MIL-101 catalysts. Owing to the excellent catalytic activity, the reaction proceeded at atmospheric pressure and low temperature (50 °C). The Ag@MIL-101 porous material is of outstanding bifunctional character as it is capable of simultaneously capturing and converting CO2 with low energy consumption and can be recovered easily by centrifugation.
The Amino Acid Alphabet and the Architecture of the Protein Sequence-Structure Map. I. Binary Alphabets

The correspondence between protein sequences and structures, or sequence-structure map, relates to fundamental aspects of structural, evolutionary and synthetic biology. The specifics of the mapping, such as the fraction of accessible sequences and structures, or the sequences' ability to fold fast, are dictated by the type of interactions between the monomers that compose the sequences. The set of possible interactions between monomers is encapsulated by the potential energy function. In this study, I explore the impact of the relative forces of the potential on the architecture of the sequence-structure map. My observations rely on simple exact models of proteins and random samples of the space of potential energy functions of binary alphabets. I adopt a graph perspective and study the distribution of viable sequences and the structures they produce, as networks of sequences connected by point mutations. I observe that the relative proportion of attractive, neutral and repulsive forces defines types of potentials, that induce sequence-structure maps of vastly different architectures. I characterize the properties underlying these differences and relate them to the structure of the potential. Among these properties are the expected number and relative distribution of sequences associated to specific structures and the diversity of structures as a function of sequence divergence. I study the types of binary potentials observed in natural amino acids and show that there is a strong bias towards only some types of potentials, a bias that seems to characterize the folding code of natural proteins. I discuss implications of these observations for the architecture of the sequence-structure map of natural proteins, the construction of random libraries of peptides, and the early evolution of the natural amino acid alphabet.
Compact Wideband Differential Bandpass Filters Using Half-Wavelength Ring Resonator

A new compact wideband differential bandpass filters with wideband common mode suppression using half-wavelength ring resonator is presented in this letter. Five-order passband for the wideband differential mode with two transmission zeros close to the passband is realized with four open stubs. A planar wideband differential filter (3 dB fractional bandwidth 79%) with wideband common mode suppression is designed and fabricated. The theoretical and measured results agree well and show good in-band filtering performances and high selectivity.
Applying fuzzy analytic network process in quality function deployment model

In this paper, we propose an empirical study of QFD implementation when fuzzy numbers are used to handle the uncertainty associated with different components of the proposed model. We implement fuzzy analytical network to find the relative importance of various criteria and using fuzzy numbers we calculate the relative importance of these factors. The proposed model of this paper uses fuzzy matrix and house of quality to study the products development in QFD and also the second phase i.e. part deployment. In most researches, the primary objective is only on CRs to implement the quality function deployment and some other criteria such as production costs, manufacturing costs etc were disregarded . The results of using fuzzy analysis network process based on the QFD model in Daroupat packaging company to develop PVDC show that the most important indexes are being waterproof, resistant pill packages, and production cost. In addition, the PVDC coating is the most important index in terms of company experts’ point of view.
Bounded Branching and Modalities in Non-Deterministic Planning

We study the consequences on complexity that arise when bounds on the number of branch points on the solutions for non-deterministic planning problems are imposed as well as when modal formulae are introduced into the description language. New planning tasks, such as whether there exists a plan with at most k branch points for a fully (or partially) observable non-deterministic domain, and whether there exists a no-branch (a.k.a. conformant) plan for partially observable domains, are introduced and their complexity analyzed. Among other things, we show that deciding the existence of a conformant plan for partially observable domains with modal formulae is 2EXPSPACE-complete, and that the problem of deciding the existence of plans with bounded branching, for fully or partially observable contingent domains, has the same complexity of the conformant task. These results generalize previous results on the complexity of non-deterministic planning and fill a slot that has gone unnoticed in non-deterministic planning, that of conformant planning for partially observable domains.
Gender Games: A Content Analysis Of Gender Portrayals In Modern, Narrative Video Games

Video games are a multi-billion dollar industry; 67% of households in the United States have at least one game player. The considerable reach of this medium makes it crucial to assess the messages that audiences are taking away concerning gender in these games. In this content analysis, I investigate the representation of binary gender in the narratives of modern video games from the perspective of cultivation theory. Ten popular games from 2007 through 2013 are selected for this investigation. The characteristics of each game’s main character are evaluated in the context of the narrative to uncover emergent trends, tropes, and themes over the course of gameplay. Men outnumber women in protagonist roles, and women serve as catalysts for the central conflicts throughout the narrative. Gaming narratives also tend to embody the male power fantasy trope, with both male and female protagonists becoming masculinized through the story’s progression. INDEX WORDS: Video games, Media, Gender, Cultivation Theory, Gender Schema Theory, Narrative GENDER GAMES: A CONTENT ANALYSIS OF GENDER PORTRAYALS IN MODERN, NARRATIVE VIDEO GAMES
Effect of rehabilitation tasks on organization of movement after stroke.

OBJECTIVE The purpose of this study was to examine the effect of presence or absence of an object (goal-directed action vs. rote exercise) and the effect of functional specificity of the object on the organization of reaching movements of persons who have had a stroke. METHOD A repeated-measure counterbalanced design was used in each of two experiments. Eighteen persons who had been hospitalized after stroke were recruited from the roster of a rehabilitation hospital and through stroke clubs and volunteered to participate. Fourteen of these became the data-producing sample. In Experiment 1, the OPTO-TRAK/3020 motion analysis system was used to record movement when the participants reached for preferred food (goal-directed action) or to a spatial location (rote exercise). In Experiment 2, the system recorded movement when participants reached to pick up the receiver of an active telephone (natural context), a detached receiver (partial context), and a stick (simulated context). The organization of the reach movement was described kinematically as the number of zero crossings of the acceleration profile (smoothness), movement time (speed), displacement, peak velocity (an indication of force), and location of peak velocity in the velocity profile (planning strategy). RESULTS Goal-directed action produced significantly smoother, faster, more forceful, and more preplanned movement than did the rote exercise condition. Functional specificity of the context did not significantly affect organization of the reach. CONCLUSION Goal-directed reach enabled persons with stroke to display characteristics typical of reach to a target by persons who have not had a stroke better than reaching out in space. These findings support the occupational therapy practice of using objects in a functional context to improve coordinated movement. However, the nature of the objects to be used requires further study.