Miracle-dz/UniFAR-FTUs huggingface dataset:
QoE based random sleep-awake scheduling in heterogeneous cellular networks

In this paper, we investigate an optimal resource on-off switching framework that minimizes the energy consumption of a heterogeneous cellular network. Specifically, our goal is to minimize the energy consumption of the cellular network while satisfying a desired level of buffer starvation probability, which can be considered as a quality of experience (QoE) term. For an ON/OFF bursty arrival process, we introduce recursive equations to obtain the buffer starvation probability of a mobile device (MD) for streaming services. The MD is in the coverage area of a femtocell base station (FBS) which is implemented at the cell edge of a macrocell base station (MBS), and when its buffer gets empty, the media player of the MD restarts the service after a certain amount of packets are prefetched (this event is known as start-up delay in the literature). Numerical simulations illustrate how our system significantly reduces the overall energy consumption of the network while guaranteeing a target starvation probability in comparison to the case where the MD is covered only by one MBS.
Introduction: The Second Generation and the Children of Immigrants Longitudinal Study

Abstract This Special Issue presents original results from the third wave of the Children of Immigrants Longitudinal Study [CILS], a decade-old panel that followed a large sample of second-generation youths from early adolescence to early adulthood. The issue contains results of the third survey, conducted in 2001–2003 as members of the panel had reached an average age of 24. This introduction provides evidence of the importance of the topic, describes the methodology of the study, and summarizes the contents of the issue. The following articles examine different aspects of the second-generation adaptation process in early adulthood and tests alternative hypotheses on the forms of the process and its determinants.
Content Based Medical Image Retrieval System ( CBMIRS ) Using Patch Based Representation

This research work is to develop an efficient and powerful medical search engine to classify and search the radiographic medical images. It focuses on bag of visual words image representation and a similarity matching technique to represent match and retrieve the similar images. This work addresses the issues in content based image retrieval for medical images. In this system can handles different categories of medical images in organ level and the pathology level for chest X-ray images. This simple, efficient medical image categorization and retrieval system in large radiographic archives (IRMA database) is developed for a medicine physicians and researchers those who are interested in being able to retrieve medical images based on low level features. This would make these systems more helpful for radiologists in medical settings, researches in medical analysis and medical students as well as teachers in academic healthcare environments. The methodology presented is based on local patch representation of the image content using a bag of visual words approach with a kernel based SVM classifier. The system supports the classification of X-ray images and retrieval of similar medical images for given input query image. Key terms: CBIR, IRMA, Picture archiving and Communication System, Bag of Visual Words, Computer Aided Diagnosis, Chest Radiography, image Patches.
A Model for Increasing Reform Implementation and Teacher Efficacy: Teacher Peer Coaching in Grades 3 and 6 Mathematics.

This study examined the effects of peer coaching on mathematics teaching practices and teacher beliefs about their capacity to have an impact on student learning. Twelve teachers in grades 3 and 6 participated in a brief but intensive professional development program over six months. The program focused on effective math ‐ ematics teaching strategies and peer coaching opportunities. Data sources included classroom observations, teacher self ‐ assessments, interviews, and field notes. Data were analysed using a two ‐ level qualitative coding strategy with multiple inter ‐ preters. Findings showed that teachers implemented key strategies for effective mathematics teaching, especially in facilitating student interaction and improving the quality of tasks assigned. Key words: mathematics, teaching strategies, professional development Cette etude a trait aux effets de l’enseignement mutuel en mathematiques sur les methodes pedagogiques des enseignants et leurs croyances quant a leur capacite d’avoir un impact sur l’apprentissage de leurs eleves. Douze enseignants en 3 e et 6 e annees ont participe a un programme de perfectionnement intensif sur une periode de six mois. Le programme etait axe principalement sur des strategies efficaces pour l’enseignement des mathematiques et les possibilites d’enseignement mutuel. Les sources des donnees etaient multiples : observation de la classe, auto ‐ evaluation de l’enseignant, entrevues et notes prises sur le terrain. Les donnees ont ete analysees a l’aide d’une strategie de codage qualitatif a deux niveaux avec de multiples interpretes. Les resultats indiquent que les enseignants ont mis en œuvre des strategies cles pour enseigner efficacement les mathematiques, notamment en facilitant les interactions entre les eleves et en ameliorant la qualite des tâches assignees. Mots cles : mathematiques, strategies pedagogiques, perfectionnement professionnel.
Distributions of Transmit Power and SINR in Device-to-Device Networks

We study the spatial distribution of transmit powers and signal to interference plus noise ratio (SINR) in device-to-device (D2D) networks. Using homogeneous Poisson Point Processes (PPP), cumulative distribution function (CDF) of the transmit power and SINR are analytically derived for a D2D network employing power control. Then, computer simulations are performed for the same network architecture and it is shown that device location modeling and analytical methods from stochastic geometry can enable us to obtain transmit power and SINR distributions of a D2D network.
Improving robustness of monocular urban localization using augmented Street View

With the fast development of Geographic Information Systems, visual global localization has gained a lot of attention due to the low price of a camera and the practical implications. In this paper, we leverage Google Street View and a monocular camera to develop a refined and continuous positioning in urban environments: namely a topological visual place recognition and then a 6 DoF pose estimation by local bundle adjustment. In order to avoid discrete localization problems, augmented Street View data are virtually synthesized to render a smooth and metric localization. We also demonstrate that this approach significantly improves the sub-meter accuracy and the robustness to important viewpoint changes, illumination and occlusion.
The job demands-resources model of work engagement in South African call centres

Orientation: A ‘sacrificial human resource strategy’ is practised in call centres, resulting in poor employee occupational health. Consequently, questions are posed in terms of the consequences of call centre work and which salient antecedent variables impact the engagement and wellbeing of call centre representatives. Research purpose: Firstly, to gauge the level of employee engagement amongst a sample of call centre representatives in South Africa and, secondly, to track the paths through which salient personal and job resources affect this engagement. More specifically, the relationships between sense of coherence, leadership effectiveness, team effectiveness and engagement were investigated, thus testing the Job Demands-Resources model of work engagement. Motivation for the study: To present an application of the Job Demands-Resources model of work engagement in a call centre environment in order to diagnose current ills and consequently propose remedies. Research design: A cross-sectional survey design was used and a non-probability convenient sample of 217 call centre representatives was selected. The measuring instruments comprise the Utrecht Work Engagement Scale to measure engagement, the Team Diagnostic Survey to measure team effectiveness, the leadership practices inventory to gauge leadership effectiveness, and the Orientation to Life Questionnaire to measure sense of coherence. A series of structural equation modelling analyses were performed. Main findings: Contrary to the ‘electronic sweatshop’ image attached to call centre jobs depicted in the literature, results show a high level of employee engagement for call centre representatives in the sample. Also, personal resources such as sense of coherence and job resources such as team effectiveness related significantly to engagement. A non-significant relationship exists between leadership effectiveness and engagement. Practical/managerial implications: Both the content and context of jobs need to be addressed to increase the personal and job resources of call centre representatives. Contribution/value-add: The Job Demands-Resources model of work engagement can be used to improve the occupational health and performance of employees in call centres.
Formation of the chlorophyll precursor delta-aminolevulinic acid in cyanobacteria requires aminoacylation of a tRNAGlu species

In the chloroplasts of higher plants and algae, the biosynthesis of the chlorophyll precursor delta-aminolevulinic acid (ALA) involves at least three enzymes and a tRNA species. Here we demonstrate that in cell extracts of the unicellular cyanobacterium Synechocystis sp. strain PCC 6803 ALA was formed from glutamate in a series of reactions in which activation of glutamate by glutamyl-tRNAGlu formation was the first step. The activated glutamate was reduced by a dehydrogenase which displayed tRNA sequence specificity. Fractionation of strain 6803 tRNA by reverse-phase chromatography and polyacrylamide gel electrophoresis yielded two pure tRNAGlu species which stimulated ALA synthesis in vitro. These tRNAs had identical primary sequences but differed in the nucleotide modification of their anticodon. The 6803 tRNAGlu was similar to the sequences of tRNAGlu species or tRNAGlu genes from Escherichia coli and from chloroplasts of Euglena gracilis and higher plants. Southern blot analysis revealed at least two tRNAGlu gene copies in the 6803 chromosome. A glutamate-1-semialdehyde aminotransferase, the terminal enzyme in the conversion of glutamate to ALA in chloroplasts, was detected in 6803 cell extracts by the conversion of glutamate-1-semialdehyde to ALA and by the inhibition of this reaction by gabaculin.
Opacity in compact extragalactic radio sources and its effect on astrophysical and astrometric studies

Context. The apparent position of the “core” in a parsec-scale radio jet (a compact, bright emitting region at the narrow end of the jet) depends on the observing frequency, owing to synchrotron self-absorption and external absorption. While providing a tool probing physical conditions in the vicinity of the core, this dependency poses problems for astrometric studies using compact radio sources. Aims. We investigated the frequency-dependent shift in the positions of the cores ( core shift ) observed with very long baseline interferometry (VLBI) in parsec-scale jets. We discuss related physics, as well as its effect on radio astrometry and the connection between radio and optical positions of astrometric reference objects. Methods. We searched for the core shift in a sample of 277 radio sources imaged at 2.3 GHz (13 cm) and 8.6 GHz (4 cm) frequency bands using VLBI observations made in 2002 and 2003. The core shift was measured by referencing the core position to optically thin jet features whose positions are not expected to change with frequency. Results. We present here results for 29 selected active galactic nuclei (AGN) with bright distinct VLBI jet features that can be used in differential measurements and that allow robust measurements of the shift to be made. In these AGN, the magnitude of the measured core shift between 2.3 and 8.6 GHz reaches 1.4 mas, with a median value for the sample of 0.44 mas. Nuclear flares result in temporal variability of the shift. Conclusions. An average shift between the radio (4 cm) and optical (6000 A) bands is estimated to be approximately 0.1 mas, and it should be taken into account in order to provide the required accuracy of the radio-optical reference frame connection. This can be accomplished with multi-frequency VLBI measurements yielding estimates of the core shift in the sources used for the radio reference frame and radio-optical position alignment.
Dual antiplatelet therapy for acute coronary syndromes: How long to continue?

For patients with an acute coronary syndrome event, current guidelines recommend dual antiplatelet therapy for at least 12 months after drug-eluting stent placement. However, several clinical trials have assessed whether continuing dual antiplatelet therapy beyond 12 months is beneficial. We review the pros and cons of extending dual antiplatelet therapy. After drug-eluting stent placement, at least 12 months of dual antiplatelet therapy is recommended. Would longer be better?
Arabidopsis AtPLC2 Is a Primary Phosphoinositide-Specific Phospholipase C in Phosphoinositide Metabolism and the Endoplasmic Reticulum Stress Response

Abstract Phosphoinositides represent important lipid signals in the plant development and stress response. However, multiple isoforms of the phosphoinositide biosynthetic genes hamper our understanding of the pivotal enzymes in each step of the pathway as well as their roles in plant growth and development. Here, we report that phosphoinositide-specific phospholipase C2 (AtPLC2) is the primary phospholipase in phosphoinositide metabolism and is involved in seedling growth and the endoplasmic reticulum (ER) stress responses in Arabidopsis thaliana. Lipidomic profiling of multiple plc mutants showed that the plc2-1 mutant increased levels of its substrates phosphatidylinositol 4-phosphate and phosphatidylinositol 4,5-bisphosphate, suggesting that the major phosphoinositide metabolic pathway is impaired. AtPLC2 displayed a distinct tissue expression pattern and localized at the plasma membrane in different cell types, where phosphoinositide signaling occurs. The seedlings of plc2-1 mutant showed growth defect that was complemented by heterologous expression of AtPLC2, suggesting that phosphoinositide-specific phospholipase C activity borne by AtPLC2 is required for seedling growth. Moreover, the plc2-1 mutant showed hypersensitive response to ER stress as evidenced by changes in relevant phenotypes and gene expression profiles. Our results revealed the primary enzyme in phosphoinositide metabolism, its involvement in seedling growth and an emerging link between phosphoinositide and the ER stress response.
Using Community Mapping to Understand Family Planning Behavior

Traditional approaches to researching family planning in developing countries utilize surveys, focus group discussions, key informant interviews, or some combination thereof. However, these methods are limited in their ability to measure community-level influences on family planning behavior. In this article, we assess the benefits of applying community mapping, a participatory research technique, to understand social and cultural influences on family planning in rural Ethiopia and Kenya. In gender-segregated focus groups, participants collaboratively created a map of their district or zone, which they subsequently used to anchor discussion of local supports, barriers, and targets for change. Qualitative analysis of the transcripts revealed that community mapping is a powerful tool with which to understand community-level factors that influence family planning. By facilitating reflection on and discussion of local assets and issues, the mapping exercise identifies relevant factors from the perspective of community members and defines priority points for intervention.
Handover Strategies in Beacon-Enabled Mobile Sensor Network

IEEE 802.15. 4 has become the de facto standard in many areas of wireless sensor network (WSN) such as body area networks, industrial automation, and healthcare domains. In many WSN applications, the sensor nodes could be mobile, and indoor communications are limited in terms of signal propagation. Therefore, a large number of access points need to be deployed to cover large areas. To maintain the sensor connectivity, sensor node should frequently change the serving access point by performing a mechanism known as a handover. We observed that the amount of time required for the association process is the key reason IEEE 802.15. 4 is unable to handle the mobility. In this paper, we show what is required for node mobility support and propose three strategies for the support. First, the proactive algorithm is developed to anticipate the future link breakage. Second, a new greedy scanning technique is presented, which prevents nodes from scanning multiple channels. Third, the coordinator selection algorithm is developed which chooses the best coordinator that gives the longest connectivity time reducing the handover frequency. Experimental results have verified that our schemes work well in the mobile sensor network environment.
The Gruesome Dozen: Problems Plaguing Program/Project Evaluators

Evaluation is a mystique. Evaluators write much about their successes. However, those who do don't tell too much for fear that (1) others will learn so well that the "experts" may lose their edge in getting lucrative contracts, or (2) the science of evaluation will be exposed as less than perfect. This cycle is easily perpetuated because practicing evaluators seldom discuss common problems; they allow the neophyte to learn in the College of Hard Knocks. This oversimplified narrative, in the spirit of the federal government's interest in streamlining the bureaucracy, is the first trickle of information "from the highest levels of Eeyore's Gloomy Place" (apologies to A. A. Milne). Interest in evaluation has been increas-
Suppression Effect of Superoxide Dismutase (SOD)-Like Activity Protein Partially Purified from Raphnus sativus Leaves against Liver Metastasis in Mice Intraperitoneally Infected with Ehrlich Ascites Carcinoma Cell

Liver metastasis is a normal result in Ehrlich Ascites Carcinoma Cell (EAC) infected mice. A partially purified protein with Superoxide Dismutase (SOD)-like activity extracted from leaves of Raphnus sativus was tested for its ability to down regulate liver metastasis of Ehrlich Ascites Carcinoma Cell (EAC) intraperitoneally implanted in albino mice. Sixty albino mice were divided equally into 4 groups. Group I mice (G1 control) were treated with physiologic saline solution for 7 days. Group 2 mice (G2) were injected with the partially purified protein. Group 3 mice (G3) were intraperitoneally inoculated with EAC cells and treated with the partially purified protein. Group 4 mice (G4) were inoculated EAC cells and treated with physiologic saline solution. The results showed a disturbance in liver functions. This disturbance was observed as a reduction in the values of serum albumin, hemoglobin, total counts of erythrocytes and platelets, total lipids in liver tissues, erythrocytes SOD activity, serum glucose, reduced glutathione (GSH) and the trace elements (Fe, Mn, Zn, and Cu) contents in liver and spleen tissues as well as the elevation of serum transaminases activities, the levels of malondialdehyde in blood, DNA and RNA of liver tissues in the infected mice (G4). On the other hand, in G3, after treatment with the partial purified protein all these parameters restored their normal values and became near from the normal group (GI). Moreover, the protein showed no toxicity towards the mice as shown in G2. It could be concluded that a partially purified protein with Superoxide Dismutase (SOD)-like activity extracted from leaves of Raphnus sativus as a nature source has a promised future in controlling liver metastasis.
TransCom: A Virtual Disk-Based Cloud Computing Platform for Heterogeneous Services

This paper presents the design, implementation, and evaluation of TransCom, a virtual disk (Vdisk) based cloud computing platform that supports heterogeneous services of operating systems (OSes) and their applications in enterprise environments. In TransCom, clients store all data and software, including OS and application software, on Vdisks that correspond to disk images located on centralized servers, while computing tasks are carried out by the clients. Users can choose to boot any client for using the desired OS, including Windows, and access software and data services from Vdisks as usual without consideration of any other tasks, such as installation, maintenance, and management. By centralizing storage yet distributing computing tasks, TransCom can greatly reduce the potential system maintenance and management costs. We have implemented a multi-platform TransCom prototype that supports both Windows and Linux services. The extensive evaluation based on both test-bed experiments and real-usage experiments has demonstrated that TransCom is a feasible, scalable, and efficient solution for successful real-world use.
Perturbações do comportamento alimentar na gravidez: uma revisão

Esta revisao de literatura visa abordar os processos envolvidos nas perturbacoes do comportamento alimentar no periodo gravidico, nomeadamente no que respeita as vivencias subjectivas das mulheres gravidas e dos seus companheiros. Apesar da escassez de estudos sobre a sua experiencia neste periodo, sobretudo relativos as vivencias dos intervenientes, e visivel a variedade de respostas das gravidas que tiveram alguma perturbacao do comportamento alimentar na sua historia de vida. Para alem da prevalencia e dos riscos associados a estas perturbacoes para a gravida e para o bebe, analisa-se a precipitacao, melhoria, manutencao ou agravamento de sintomas associados a estas perturbacoes e possiveis factores envolvidos. Aborda-se, finalmente, a importância na avaliacao e intervencao dos tecnicos de saude.
Toward an analysis of emotion regulation in children using late positive potential

The ability of emotion regulation and emotional responses in children is a main component of emotional competence through the development process. We had employed electroencephalography (EEG) a well-known noninvasive method for recording of brain emotion signals in order to analyze the emotion regulations in children. The international affective picture system (IAPS) pictures dataset was used for selection of stimuli presentation. The stimulus presentation was commonly practiced to induce the emotional responses from human brain. Brain signals were recorded using EEG electrodes and analyzed after preprocessing. There are rare studies available for detection of emotion regulation in children using late positive potential (LPP) analysis. The event related potential (ERP) is well known for analysis in cognitive neuroscience that was used in this paper for analysis of LPP. In this paper, we proposed the LPP as a neural marker for physiatrists and neurophysiologists to detect the mood disruption in children. We employed 21 subjects in this investigation, which were aged from 12 to 14 years. The ERP was analyzed through stimulus lock strategy which includes 180 stimuli of four emotions (arousal-valence). Each stimulus time duration was 1.5 s following of 0.5 s of rest time. Results show the increased modulation of LPP amplitude under all brain regions.