Miracle-dz/UniFAR-FTUs huggingface dataset:
A Partition-Centric Distributed Algorithm for Identifying Euler Circuits in Large Graphs

Finding the Eulerian circuit in graphs is a classic problem, but inadequately explored for parallel computation. With such cycles finding use in neuroscience and Internet of Things for large graphs, designing a distributed algorithm for finding the Euler circuit is important. Existing parallel algorithms are impractical for commodity clusters and Clouds. We propose a novel partition-centric algorithm to find the Euler circuit, over large graphs partitioned across distributed machines and executed iteratively using a Bulk Synchronous Parallel (BSP) model. The algorithm finds partial paths and cycles within each partition, and refines these into longer paths by recursively merging the partitions. We describe the algorithm, analyze its complexity, and validate it on Apache Spark for large graphs. Our experiments show that memory pressure still limits weak and strong scaling, and we propose an enhanced design to address it.
Modeling Fluctuation of the Price of Crude Oil in Nigeria Using ARCH, ARCH-M Models

As a mono-product economy, where the main export commodity is crude oil, volatility in oil prices has implications for the Nigerian economy and, in particular, exchange rate movements. The latter is particularly important due to the twin dilemma of being an oil exporting and oil-importing country, a situation that emerged in the last decade. The study examined the effects of oil price volatility, demand for foreign exchange, and external reserves on exchange rate volatility in Nigeria using monthly data over the period from May, 1989 to April 2019. Drawing from the works of Atoi [1] Having realized the potentials of an Autoregressive conditional heteroskedasticity (ARCH) model several studies have use it in modeling financial series. However, when using the ARCH model in determining the optimal lag length of variables the processes are very cumbersome. Therefore, often time users encounter problems of over parameterization. Thus, Rydberg (2016) argued that since large lag values are required in ARCH model therefore there is the need for additional parameters. Sequel to that, this research uses the ARCH-M to solve the challenges. The study reaffirms the direct link of demand for foreign exchange and oil price volatility with exchange rate movements and, therefore, recommends that demand for foreign exchange should be closely monitored and exchange rate should move in tandem with the volatility in crude oil prices bearing in mind that Nigeria remains an oil-dependent economy.
An Exploration of State-of-the-art Methods for Offensive Language Detection

We provide a comprehensive investigation of different custom and off-the-shelf architectures as well as different approaches to generating feature vectors for offensive language detection. We also show that these approaches work well on small and noisy datasets such as on the Offensive Language Identification Dataset (OLID), so it should be possible to use them for other applications.
Intimate Partner Violence and Psychological Maladjustment: Examining the Role of Institutional Betrayal Among Survivors

Research has found that a majority of individuals, irrespective of gender, experienced their first intimate partner violence (IPV) victimization between the ages of 18 and 24 years. Indeed, researchers have found that college students’ experiences of IPV are comparable if not higher than that of the general population. IPV victimization also places individuals at a higher risk for developing psychological conditions. In addition, when IPV experiences occur on college campuses, there are a variety of institutional factors that may impact the outcome of the traumatic event for the survivor. The present study seeks to examine whether institutional betrayal moderates the relationship between IPV and different psychological outcomes (i.e., depression, posttraumatic stress, anxiety). The study analyzed survey responses from a sample of 316 undergraduate students attending a Midwestern University. Three separate hierarchical regression analyses were conducted for each of the maladaptive psychological outcomes. Results showed that institutional betrayal was positively correlated with depressive symptoms, posttraumatic stress symptoms, and anxiety symptoms. Interestingly, institutional betrayal was a significant predictor of depressive symptoms, posttraumatic stress symptoms, and anxiety symptoms when controlling for the effects of physical violence, sexual violence, and psychological aggression. The present study highlights the significance of the impact of institutional betrayal, independent of interpersonal betrayal, on mental health.
Time Series Predict DB

In this work, we are motivated to make predictive functionalities native to database systems with focus on time series data. We propose a system architecture, Time Series Predict DB, that enables predictive query in any existing time series database by building an additional "prediction index" for time series data. To be effective, such an index needs to be built incrementally while keeping up with database throughput, able to scale with volume of data, provide accurate predictions for heterogeneous data, and allow for "predictive" querying with latency comparable to the traditional database queries. Building upon a recently developed model agnostic time series algorithm by making it incremental and scalable, we build such a system on top of PostgreSQL. Using extensive experimentation, we show that our incremental prediction index updates faster than PostgreSQL ($1\mu s$ per data for prediction index vs $4\mu s$ per data for PostgreSQL) and thus not affecting the throughput of the database. Across a variety of time series data, we find? that our incremental, model agnostic algorithm provides better accuracy compared to the best state-of-art time series libraries (median improvement in range 3.29 to 4.19x over Prophet of Facebook, 1.27 to 1.48x over AMELIA in R). The latency of predictive queries with respect to SELECT queries (0.5ms) is < 1.9x (0.8ms) for imputation and < 7.6x (3ms) for forecasting across machine platforms. As a by-product, we find that the incremental, scalable variant we propose improves the accuracy of the batch prediction algorithm which may be of interest in its own right.
The Role of Jordanian Secondary School Teachers in Educating Students About Cyber Bullying and the Difficulties They Face in That

The study aimed to reveal the role of Jordanian secondary school teachers in educating students about cyber bullying and the difficulties they face in this. In order to achieve the aims of the study, the descriptive survey method was used for its suitability to the nature of this study, and the study adopted a questionnaire developed to collect data, and it was distributed on a random sample that included 173 teachers from Jordanian government schools in the second Amman Directorate, The study found that the role of Jordanian secondary school teachers in educating students about cyber bullying was average, and the results also showed that the difficulties facing them in this came with an average degree, As the most prominent of these difficulties facing the teacher was the fear of the victim of bullying from talking to others that he was bullied. The study recommended the necessity of enhancing the teacher's role in combating the phenomenon of electronic bullying by providing enough time outside classroom classes to educate students and motivate teachers to take this positive role. In addition to encouraging students to disclose the incidents of electronic bullying that they have been exposed to, because students' fear of speaking to others increases the phenomenon and makes it difficult for teachers or parents to deal with. Keywords : cyberbullying. DOI: 10.7176/JEP/11-8-15 Publication date: March 31 st 2020
Effect of Sr substitution on the property and stability of CH3NH3SnI3 perovskite: A first‐principles investigation

The power conversion efficiency of organic‐inorganic hybrid perovskite solar cells (PSCs) has exceeded 25%, but the instability limited their practical applications. In this paper, we report a comprehensive study on a Sn‐ and Sr‐mixed lead‐free perovskites, MASn1−xSr xI3(x = 0, 0.25, 0.5, 0.75, 1), by using the first‐principles calculations based on the density functional theory. The crystal structures, band gaps, surface properties, and the adsorptions of oxygen and water molecules on the surfaces of the materials were analyzed and discussed. Our results show that the lattice constants and band gaps of MASn1−xSr xI3 become larger with the increase of Sr components. The band gap of MASrI3 is 4.16 eV, which is too large to be suitable as an efficient photo absorber in the solar cell, but one of the half substituted compounds, MASn0.5Sr0.5I3, has an adequate band gap of 1.37 eV. Both oxygen and water molecules prefer to adsorb on the metal sites (Sn and Sr), and Sr atom has larger attractive ability to oxygen and water molecules than Sn atom. The adsorptions of water on metal atoms are stronger than that of oxygen molecule. The charge transfer from Sn atom to O2/H2O molecule is larger than that from Sr to the adsorbate in the adsorption process, meaning that Sn atom is easier to be oxidized than Sr atom in the air condition. The adsorption energies for O2/H2O adsorbed on clean, and H2O/O2 preadsorbed surfaces are comparable, indicating that the already adsorbed molecule does not exclude the upcoming molecule. So, we predict that a stable Sn‐ and Sr‐mixed PSC material with a suitable band gap can be obtained through the substitution of Sn atom in MASnI3 by Sr atom, and the addition of Sr atom would protect Sn atom from the oxidation to a certain extent. This study is expected to be helpful for further experiments to find new kinds of possible lead‐free perovskite materials.
Rôles des récepteurs à l'hormone thyroïdienne, TRα1 et p43, dans le contrôle de la prolifération des cellules de Sertoli chez la souris

Des changements dans le statut thyroidien alterent les fonctions testiculaires, impliquant, entre autre, le recepteur a la T3, TRα1. Lorsqu’un recepteur dominant-negatif de TRα1 (TRα AMI) est specifiquement introduit dans les cellules de Sertoli (lignee TRα AMI-SC), on observe une augmentation significative de l’index de proliferation des cellules de Sertoli a 3 jpp, induisant une augmentation de la densite de ces cellules et du poids testiculaire chez l’adulte. Ce phenotype est correle a une modification de l’expression de genes cles du cycle cellulaire dont Cdk4, JunD et c-myc. Lorsque le recepteur TRα AMI est introduit egalement dans les cellules de Leydig (lignee TRα AMI-Aro), la secretion de testosterone est augmentee. Enfin, nous montrons l’implication de l’isoforme mitochondriale p43 du recepteur TRα1, dans ce controle T3- dependant et autonome de la proliferation des cellules de Sertoli suggerant l’existence d’un crosstalk entre genome nucleaire et mitochondrial dans cette regulation par la T3.
CLRL: Feature Engineering for Cross-Language Record Linkage

Record linkage aims at identifying duplicate records across datasets. Most existing record linkage techniques have been designed for monolingual datasets. In this paper, we propose a novel approach, CLRL, that links the records in a cross-language setting, where each input dataset is in a different language. CLRL combines monolingual similarity measures with multilingual cross-language word embedding similarities to identify the correspondence of records across datasets. As our experiments show, CLRL outperforms baseline approaches in cross-language data integration settings.
Polyploidy and the sexual system: what can we learn from Mercurialis annua?

The evolutionary success of polyploidy most directly requires the ability of polyploid individuals to reproduce and transmit their genes to subsequent generations. As a result, the sexual system (i.e. the mating system and the sex allocation of a species) will necessarily play a key role in determining the fate of a new polyploid lineage. The effects of the sexual system on the evolution of polyploidy are complex and interactive. They include both aspects of the genetic system, the genetic load maintained in a population and the ecological context in which selection takes place. Here, we explore these complexities and review the empirical evidence for several potentially important genetic and ecological interactions between ploidy and the sexual system in plants. We place particular emphasis on work in our laboratory on the European annual plant Mercurialis annua, which offers promising scope for detailed investigations on this topic. M. annua forms a polyploid complex that varies in its sexual system from dioecy (separate sexes) through androdioecy (males and hermaphrodites) to functional hermaphroditism.
Scar Volumization With Pedicle Fat During Forehead Flap Takedown.

Various techniques have been developed to improve skin texture and depressed contour abnormalities that can result from scar formation. The use of subcision to release dermal layers from underlying scar tether is one such widely accepted method. To enhance the effects of subcision, many adjunctive procedures have been reported in the literature, including laser and chemical resurfacing, upward suture traction, microneedling, and placement of autologous or synthetic fillers. Autologous fat is a biocompatible tissue source for filling soft-tissue defects caused by trauma, deep burns, or surgery. Adipose tissue is rich in mesenchymal stem cells postulated to enhance tissue repair mechanismsafter plastic and reconstructive surgery. As such, it has become a popular choice for scar volumization, but obtaining autologous fat often requires creation of a second surgery site with additional morbidity. We present a patient in whom a paramedian forehead flap was used to reconstruct a large medial canthal Mohs defect. A depressed flap donor site scar was revised at the time of flap takedown using subcision followed by augmentation with fat harvested from the excised pedicle. The clinical care and report of the patient described herein were undertaken in a fashion in accordance with the principles of the Declaration of Helsinki and with Health Insurance Portability and Accountability Act (HIPAA) regulations.
Static Balancing of Wheeled-legged Hexapod Robots

Locomotion over different terrain types, whether flat or uneven, is very important for a wide range of service operations in robotics. Potential applications range from surveillance, rescue, or hospital assistance. Wheeled-legged hexapod robots have been designed to solve these locomotion tasks. Given the wide range of feasible operations, one of the key operation planning issues is related to the robot balancing during motion tasks. Usually this problem is related with the pose of the robot’s center of mass, which can be addressed using different mathematical techniques. This paper proposes a new practical technique for balancing wheeled-legged hexapod robots, where a Biodex Balance System model SD (for static & dynamic) is used to obtain the effective position of the center of mass, thus it can be recalculated to its optimal position. Experimental tests are carried out to evaluate the effectiveness of this technique and modify and improve the position of hexapod robots’ center of mass.
Gender differences in the presentation of chest pain in obstructive coronary artery disease: results from the Korean Women’s Chest Pain Registry

Background/Aims Chest pain in patients with obstructive coronary artery disease (OCAD) is affected by several social factors. The gender-based differences in chest pain among Koreans have yet to be investigated. Methods The study consecutively enrolled 1,549 patients (male/female, 514/1,035; 61 ± 11 years old) with suspected angina. The predictive factors for OCAD based on gender were evaluated. Results Men experienced more squeezing type pain on the left side of chest, while women demonstrated more dull quality pain in the retrosternal and epigastric area. After adjustment for risk factors, pain in the retrosternal area (odds ratio [OR], 1.491; 95% confidence interval [CI], 1.178 to 1.887) and aggravation by exercise (OR, 2.235; 95% CI, 1.745 to 2.861) were positively associated with OCAD. In men, shorter duration (OR, 1.581; 95% CI, 1.086 to 2.303) and dyspnea (OR, 1.610; 95% CI, 1.040 to 2.490) increased the probability for OCAD, while left-sided chest pain suggested a low probability for OCAD (OR, 0.590; 95% CI, 0.388 to 0.897). In women, aggravation by emotional stress (OR, 0.348; 95% CI, 0.162 to 0.746) and dizziness (OR, 0.457; 95% CI, 0.246 to 0.849) decreased the probability for OCAD. Conclusions This is the first study to focus on gender differences in chest pain among Koreans with angina. Symptoms with high probability for OCAD were different between sexes. Our findings suggest that patient’s medical history in pretest assessment for OCAD should be individualized considering gender.
Estimation of yellowfin tuna (Thunnus albacares) habitat in waters adjacent to Australia’s East Coast: making the most of commercial catch data

The physical environment directly inﬂuences the distribution, abundance, physiology and phenology of marine species. Relating species presence to physical ocean characteristics to determine habitat associations is fundamental to the management of marine species. However, direct observation of highly mobile animals in the open ocean, such as tunas and billﬁsh, is challenging and expensive. As a result, detailed data on habitat preferences using electronic tags have only been collected for the large iconic, valuable or endangered species. An alternative is to use commercial ﬁshery catch data matched with historical ocean data to infer habitat associations. Using catch information from an Australian longline ﬁshery and Bayesian hierarchical models, we investigate the inﬂuence of environmental variables on the catch distribution of yellowﬁn tuna ( Thunnus albacares ). The focus was to understand the relative importance of space, time and ocean conditions on the catch of this pelagic predator. We found that pelagic regions with elevated eddy kinetic energy, a shallow surface mixed layer and relatively high concentrations of chlorophyll a are all associated with high yellowﬁn tuna catch in the Tasman Sea. The time and space information incorporated in the analysis, while important, were less informative than oceanic variables in explaining catch. An inspection of model prediction errors identified clumping of errors at margins of ocean features, such as eddies and frontal features, which indicate that these models could be improved by including representations of dynamic ocean processes which affect the catch of yellowﬁn tuna.
Topic-Guided Variational Auto-Encoder for Text Generation

We propose a topic-guided variational auto-encoder (TGVAE) model for text generation. Distinct from existing variational auto-encoder (VAE) based approaches, which assume a simple Gaussian prior for latent code, our model specifies the prior as a Gaussian mixture model (GMM) parametrized by a neural topic module. Each mixture component corresponds to a latent topic, which provides a guidance to generate sentences under the topic. The neural topic module and the VAE-based neural sequence module in our model are learned jointly. In particular, a sequence of invertible Householder transformations is applied to endow the approximate posterior of the latent code with high flexibility during the model inference. Experimental results show that our TGVAE outperforms its competitors on both unconditional and conditional text generation, which can also generate semantically-meaningful sentences with various topics.
Iron Metabolism in Liver Cancer Stem Cells

Cancer stem cells (CSC) which have been identified in several tumors, including liver cancer, represent a particular subpopulation of tumor cells characterized by properties similar to those of adult stem cells. Importantly, CSC are resistant to standard therapies, thereby leading to metastatic dissemination and tumor relapse. Given the increasing evidence that iron homeostasis is deregulated in cancer, here we describe the iron homeostasis alterations in cancer cells, particularly in liver CSC. We also discuss two paradoxically opposite iron manipulation-strategies for tumor therapy based either on iron chelation or iron overload-mediated oxidant production leading to ferroptosis. A better understanding of iron metabolism modifications occurring in hepatic tumors and particularly in liver CSC cells may offer new therapeutic options for this cancer, which is characterized by increasing incidence and unfavorable prognosis.
Oxygen compared to air during exercise training in COPD with exercise-induced desaturation

Almost half the patients referred to pulmonary rehabilitation with chronic obstructive pulmonary disease (COPD) desaturate during exercise. Although oxygen supplementation may ameliorate oxygen desaturation, the effects on outcomes of exercise training have not been rigorously evaluated. This study aimed to determine whether supplemental oxygen during exercise training was more effective than medical air in improving exercise capacity and health-related quality of life (HRQoL) in people with COPD. People with COPD who demonstrated oxygen desaturation <90% during the 6-min walk test were recruited to this multicentre trial with randomisation (independent, concealed allocation) to either an Oxygen group or Air group, blinding (participants, exercise trainers and European Respiratory Journal assessors) and intention-to-treat analysis. Both groups received the respective gas from concentrators via nasal prongs at 5 L·min−1 during exercise training consisting of treadmill and cycle exercise, three times per week for 8 weeks. Primary outcomes were the endurance shuttle walk test (ESWT) time and Chronic Respiratory Disease Questionnaire (CRQ)-Total score. 111 participants (60 males), mean±sd age 69±7 years, with moderate to severe COPD were recruited and 97 completed (Oxygen group n=52; Air group n=45). At the end of the 8-week training programme there were no between-group differences in change in ESWT (mean difference 15 s (95% CI −106–136 s) or change in CRQ-Total (0.0 points (95% CI −0.3–0.3 points)). Within-group changes at end-training were significant for ESWT and CRQ-Total (all p<0.01). Exercise capacity and HRQoL improved in both groups, with no greater benefit from training with supplemental oxygen than medical air. Exercise training improved exercise capacity and quality of life in normoxaemic COPD patients who demonstrated oxygen desaturation during exercise, with no greater improvement with supplemental oxygen during exercise training compared to air http://ow.ly/7hRP30o3vxu
Administração experimental de esteróide anabólico androgênico e álcool causa alterações histológicas e morfométricas nos ovários e útero de ratas adultas

O uso abusivo e indiscriminado de esteroides anabolicos androgenicos e uma pratica comum entre jovens e adultos de ambos os sexos. Geralmente estas substâncias sao utilizadas simultaneamente com outras drogas, licitas ou nao, que causam prejuizos a saude. O objetivo do estudo foi avaliar a influencia da administracao experimental do esteroide decanoato de nandrolona (DN), associado ou nao ao alcool, nos ovarios e utero de ratas adultas. Femeas com ciclo estral regular (n=20), foram distribuidas nos grupos: a) controle ( solucao fisiologica); b) DN (7,5 mg/kg de peso corporeo; intraperitoneal); c) alcool (AL; 0,2 mL/100g de peso corporeo; oral); d) DN + AL. Os tratamentos foram realizados atraves de uma unica dose por semana, durante doze semanas consecutivas. Verificou-se que os tratamentos experimentais promoveram alteracoes no ciclo sexual, na histologia ovariana e uterina, na quantificacao folicular e nos parâmetros morfometricos do utero, sendo estes efeitos marcantes nos grupos androgenizados DN e DN + AL. Concluiu-se que o uso isolado ou simultâneo de esteroide anabolico e alcool promovem toxicidade ovariana e uterina em ratas adultas.