Miracle-dz/UniFAR-FTUs huggingface dataset:
Structure and Electrochemical Properties of Laser-Modified NiWO4

In recent years, nickel tungstate has attracted considerable research interest as an electrode material for supercapacitors. In this work, NiWO4 was synthesized by co-precipitation and exposed to laser irradiation. The structure of nickel tungstate was investigated by X-ray diffraction and its electrochemical properties by potentiodynamics, galvanostatic and impedance spectroscopy methods. The results show that NiWO4 subjected to laser irradiation for 180 s showed higher specific characteristics than the initial material. Namely, at a discharge current of 1 mA, NiWO4 achieves a specific capacitance of 153 F/g, and this value is 48% higher than that of the initial material. The higher specific characteristics of laser-modified NiWO4 result from the ability of the material to interact better with electrolyte ions due to the passage of fast redox reactions and the capacitance of the electrical double layer, which is confirmed by impedance studies.
ANÁLISE DE PROCESSOS POR MEIO DA SIMULAÇÃO COMPUTACIONAL: PROPOSTA DE UMA ESTRATÉGIA DE ENSINO NA GRADUAÇÃO EM ADMINISTRAÇÃO COMPUTER SIMULATED PROCESS ANALYSIS: A PROPOSED TEACHING STRATEGY FOR BUSINESS ADMINISTRATION DEGR EES

Considering the importance of the use of discrete event simulation to analyze and improve existing processes within organizations, this paper discusses the teaching of this technique in undergraduate business administration courses. The paper outlines a teaching strategy where the emphasis lies on understanding and analyzing the process to be simulated in contrast to existing approaches that focus on knowing the routines and particularities of simulation software. The proposed approach is based on the works of Laguna and Marklund (2004) and Hartvigsen (2005). The simulation is carried out using spreadsheets and the SimQuick software package. This strategy consists of four steps. The first step comprises identifying opportunities and defining the scope of work, the second step aims at a detailed description of the process to be analyzed, the third step consists of the process evaluation through computer simulation, and finally, the last step encompasses the redesign proposal. A case modeling conducted by a group of students is presented here as a teaching resource to clarify and demonstrate the proposed teaching strategy.
Mapping the Concept, Content, and Outcome of Family-Based Outdoor Therapy for Children and Adolescents with Mental Health Problems: A Scoping Review

Outdoor therapy and family-based therapy are suggested to be promising interventions for the treatment of mental health problems. The aim of the present scoping review was to systematically map the concept, content, and outcome of combining family- and outdoor-based therapy for children and adolescents with mental health problems. The Joanna Briggs Institute methodology and PRISMA guidelines were applied. Eligible qualitative and quantitative studies were screened, included, and extracted for data. Seven studies were included. Findings from these studies indicated that family-based outdoor therapy programs have a positive impact on family- and peer relationships, adolescent behavior, mental health, self-perceptions (self-concept), school success, social engagement, and delinquency rates. However, participant characteristics, study design, and content and mode of delivery of the interventions varied substantially, hence preventing detailed comparison of outcomes across studies. In addition, most of the studies included few participants and lacked population diversity and comparable control groups. Although important ethical concerns were raised, such as non-voluntary participation in some of the programs, there was a lack of reporting on safety. This review indicates that a combination of family- and outdoor-based therapy may benefit mental health among children and adolescents, but due to the limited number of studies eligible for inclusion and high levels of heterogeneity, it was difficult to draw firm conclusions. Thus, future theory-based studies using robust designs are warranted.
Tertiary motifs as building blocks for the design of protein‐binding peptides

Despite advances in protein engineering, the de novo design of small proteins or peptides that bind to a desired target remains a difficult task. Most computational methods search for binder structures in a library of candidate scaffolds, which can lead to designs with poor target complementarity and low success rates. Instead of choosing from pre‐defined scaffolds, we propose that custom peptide structures can be constructed to complement a target surface. Our method mines tertiary motifs (TERMs) from known structures to identify surface‐complementing fragments or “seeds. ” We combine seeds that satisfy geometric overlap criteria to generate peptide backbones and score the backbones to identify the most likely binding structures. We found that TERM‐based seeds can describe known binding structures with high resolution: the vast majority of peptide binders from 486 peptide‐protein complexes can be covered by seeds generated from single‐chain structures. Furthermore, we demonstrate that known peptide structures can be reconstructed with high accuracy from peptide‐covering seeds. As a proof of concept, we used our method to design 100 peptide binders of TRAF6, seven of which were predicted by Rosetta to form higher‐quality interfaces than a native binder. The designed peptides interact with distinct sites on TRAF6, including the native peptide‐binding site. These results demonstrate that known peptide‐binding structures can be constructed from TERMs in single‐chain structures and suggest that TERM information can be applied to efficiently design novel target‐complementing binders.
Global Trends in Hemophilia Research

: The hemophilias are the most common X-linked inherited bleeding disorders, and if not managed properly, they can lead to chronic disease and lifelong disabilities. The hemophilias remains a hot topic in the field of hematology. This bibliometric study aimed to investigate the current status of publications on haemophilia. The goal of this study was to retrieve data from journals that were indexed in the Web of Science (WoS; Thomson Reuters, New York, NY, USA) database. Keywords related to “Hemophilia” were used. The time span was set from 1970 to 2021. Data pertaining to growth of publications, the most active countries and institutions, the most cited journals, and mapping of publications and keywords were analyzed. Retrieved data were analyzed to present various bibliometric indicators while maps were visualized using the VOS viewer technique. The Hirsch (H) index and the impact factor (IF) of the publishing journal were used as indicators of impact of publications. A total of 7.736 articles were retrieved with an average of 22.06 and total of 170.624 citations. H index was found as 149. Study searches the publications in the period between 1970 and 2020 first article was in the year 1970. The leading country on journal number is the United States of America (USA) with (n=2474; 31.98%), followed by England (11.69%), Germany (9.76%), Italy (8.59%), Canada (6.81%), France (6.67%). Most of the retrieved articles were from research areas of Hematology (n=4706; 60.83%)
Order vs. Disorder: Cholesterol and Omega-3 Phospholipids Determine Biomembrane Organization

Lipid structural diversity strongly affects biomembrane chemico-physical and structural properties in addition to membrane-associated events. At high concentrations, cholesterol increases membrane order and rigidity, while polyunsaturated lipids are reported to increase disorder and flexibility. How these different tendencies balance in composite bilayers is still controversial. In this study, electron paramagnetic resonance spectroscopy, small angle neutron scattering, and neutron reflectivity were used to investigate the structural properties of cholesterol-containing lipid bilayers in the fluid state with increasing amounts of polyunsaturated omega-3 lipids. Either the hybrid 1-stearoyl-2-docosahexaenoyl-sn-glycero-3-phosphocholine or the symmetric 1,2-docosahexaenoyl-sn-glycero-3-phosphocholine were added to the mixture of the naturally abundant 1-palmitoyl-2-oleyl-sn-glycero-3-phosphocholine and cholesterol. Our results indicate that the hybrid and the symmetric omega-3 phospholipids affect the microscopic organization of lipid bilayers differently. Cholesterol does not segregate from polyunsaturated phospholipids and, through interactions with them, is able to suppress the formation of non-lamellar structures induced by the symmetric polyunsaturated lipid. However, this order/disorder balance leads to a bilayer whose structural organization cannot be ascribed to either a liquid ordered or to a canonical liquid disordered phase, in that it displays a very loose packing of the intermediate segments of lipid chains.
Software Product Lines Essentials

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Proportional Electromagnetic Valve Driven by Frequency-varying PWM

In applications of excavator or other industrial machines,proportional electromagnetic valve was usually driven by PWM signals of embedded control system.However,due to pulse output characteristics of electromagnet,the performance of proportional electromagnetic valve was limited,even impacted stability of the system.A frequency-varying method of PWM driving was proposed.According to different duty ratio of PWM,the embedded control system output PWM with different frequencies.Through this method,the output oil pressure of proportional electromagnetic valve maintains within a determinated range,the valve-core's zero-average oscillations is reserved and power consumption of proportional electromagnetic valve is relatively low.
Implementation of the spherical harmonics in glare sources simulation

The UGR index is practically used measure of a discomfort glare for the interior working environment. The basic parameters of the index formula are the angular dependences which define the visibility of light sources. In the paper the new method for light sources description has been presented. The mathematical model using spherical harmonics is discussed. Spherical harmonics allows for convenient and efficient description of the light sources positions as well as their shapes in the field of view. Streszczenie Wskaźnik UGR jest praktycznie stosowaną miarą olśnienia przykrego dla stanowisk pracy we wnętrzach. Podstawowymi parametrami wpływającymi na wartość wskaźnika są zależności kątowe w jakich widoczne są źródła światła. W artykule została przedstawiona nowa metoda opisu źródeł światła z wykorzystaniem harmonicznych sferycznych. Pozwalają one na wygodny i skuteczny opis położenia źródeł światła, jak również ich kształtu w polu widzenia. (Implementacja harmonicznych sferycznych w symulacji źródła olśnienia)
A DTN oriented adaptive routing algorithm based on node load

In recent years, Delay Tolerant Networks (DTN) have received more and more attention. At the same time, several existing DTN routing algorithms generally have disadvantages such as poor scalability and inability to perceive changes in the network environment. This paper proposes an AdaptiveSpray routing algorithm. The algorithm can dynamically control the initial maximum message copy number according to the cache occupancy rate of the node itself, and the cache occupancy rate is added as an impact factor to the calculation of the probability of each node meeting the destination node. In the forwarding phase, the node will first compare the meeting probability of itself and the meeting node to the destination node, and then choose different forwarding strategies. The simulation shows that the AdaptiveSpray algorithm proposed in this paper has obvious advantages compared with the existing routing algorithms in terms of message delivery rate and average delay.
Unconditionally Stable FDTD Algorithm Based on Split-Step Scheme for the Analysis of Oblique Incident Plane Wave on Periodic Structures

Abstract In this paper, an unconditionally stable finite-difference time-domain (FDTD) algorithm is presented for solving the problems of oblique incident wave on 2-D periodic structures. By expressing the extra time derivatives caused by the field transformation technique as the form of the coefficient matrix, and applying the split-step scheme (2, 2) (SS2) to the transformed Maxwell’s equations, the update at each time step is subdivided into three sub-step implementations. The proposed method has second-order accuracy both in time and space, and the time step size of which is not limited by the Courant–Friedrich–Levy (CFL) stability condition. Compared with the previous approaches of the field transformation method, this technique does not need to introduce additional field components and is more efficient and accurate especially at the large incident angle.
Mesosphere and Lower Thermosphere Changes Associated With the 2 July 2019 Total Eclipse in South America Over the Andes Lidar Observatory, Cerro Pachon, Chile

This article presents the results of a week of observations around the 2 July 2019, total Chilean eclipse. The eclipse occurred between 19:22 and 21:46 UTC, with complete sun disc obscuration at 20:38–20:40 UTC (16:38–16:40 LT) over the Andes Lidar Observatory (ALO) at (30.3°S, 70.7°W). Observations were carried out using ALO instrumentation with the goal to observe possible eclipse‐induced effects on the mesosphere and lower thermosphere region (MLT; 75–105 km altitude). To complement our data set, we have also utilized TIMED/SABER temperatures and ionosonde electron density measurements taken at the University of La Serena's Juan Soldado Observatory. Observed events include an unusual fast, bow‐shaped gravity wave structure in airglow images, mesosphere temperature mapper brightness as well as in lidar temperature with 150 km horizontal wavelength 24 min observed period, and vertical wavelength of 25 km. Also, a strong zonal wind shear above 100 km in meteor radar scans as well as the occurrence of a sporadic E layer around 100 km from ionosonde measurements. Finally, variations in temperature and density and the presence of a descending sporadic sodium layer near 98 km were seen in lidar data. We discuss the effects of the eclipse in the MLT, which can shed light on a sparse set of measurements during this type of event. Our results point out several effects of eclipse‐associated changes in the atmosphere below and above but not directly within the MLT.
Design and testing of a laboratory scale test rig for wave energy converters using a double-sided permanent magnet linear generator

This study considers the design and testing of a laboratory scale test rig for wave energy converters (WECs). The main element of the test rig is a double-sided permanent magnet linear generator (PMLG). In this study, the authors describe the detailed design of the PMLG. The objective of the design is to find the detailed parameters of the PMLG to meet the targeted electromotive force (EMF) voltage with respect to the designed physical constraints. The design procedure is easy to follow and emphasises the practical aspects to construct the PMLG. A spreadsheet table was generated using the procedure to find the design parameters. Therefore, a designer can easily modify the parameters based on the physical constraints and the targeted EMF voltage. In addition to that, the authors explain the procedure to find the rating temperature for the generator. Finally, this PMLG is integrated with other components to form the test rig. The experiment is conducted to show how close the performance of the constructed PMLG is, in term of its EMF voltage and rated thermal, to the designed values. Additional tests were also conducted to test the performance of the test rig using various scenarios similar to ocean wave profiles.
Pair-Wise Orthogonal Classifier Based Domain Adaptation Network for Fault Diagnosis in Rotating Machinery

Although machine learning methods have demonstrated their effectiveness in fault diagnosis in rotating machinery, there is a major assumption that the training data (source domain) and testing data (target domain) should share the same distribution. However, this assumption is difficult to hold in real scenarios considering the variable working conditions, and it recasts the fault diagnosis problem in a cross-domain manner. Recently, the adversarial domain adaptation methods have become a hot research topic, since they aim to address cross-domain issues and can be well embedded into convolutional neural networks. Most previous studies aimed to achieve the optimal alignment of data in a global view. Unfortunately, they may affect the data which are originally well aligned in the local view between the source domain and the target domain, thus leading to diminished diagnosis performance. In this paper, a pair-wise orthogonal classifier based domain adaptation network is proposed to address this issue. A feature extractor together with a pair-wise orthogonal classifier is designed to learn domain-invariant features from the source domain and the target domain. Then, based on the outputs of the pair-wise classifier, a dynamic weighted domain discriminator is designed to form an adversarial framework with a feature extractor. It considers the sample-level alignment in the domain adaptation process and enables the global alignment without sacrificing the original well-aligned data. Cross-domain experiments via two datasets are carried out to validate the performance of the proposed network. Performance comparisons with state-of-the-art methods are also made. The results have demonstrated the effectiveness and novelty of the proposed network.
A systematic overview of live virtual machine migration methods

Virtualization is regarded as one of the key technologies used in cloud computing by means of which virtual resources and dynamic resources are provided for users. Power management, load balancing, online system maintenance are remarkable benefits of virtualization. Such advantages are attributed to the feature of Virtual machine (VM) migration. Many research studies have been recently conducted on live migration and many researchers are seeking to reduce migration time. Prolonged migration time results in some problems especially in WANs which are geographically far from data centers. Hence, the speed of VM transfer from the source to the destination is reduced. There are many cases which can affect the migration of the VM. To the best of the researchers' knowledge, there is no comprehensive overview of studies conducted on live VM migration. This paper is aimed at providing a systematic overview and at investigating the literature on live migration. It includes 50 selected research reports which were published between 2011 and 2020. These papers are categorized by year of publication, publisher, number of citations, authors, immigration methods, techniques used, and effective parameters, and different results have been obtained from them, which we have been discussed in the paper.
Substituting Resistance Spot Welding with Flexible Laser Spot Welding to Join Ultra-Thin Foil of Inconel 718 to Thick 410 Steel

This paper investigated various aspects of replacing existing micro-resistance spot welding (micro-RSW) with micro-laser spot welding for joining Inconel 718 thin foils to thick 410 steel stack-up to allow faster, non-contact joining together with flexibility in spot positioning and removal of tip dressing required for RSW electrodes. The joint quality was evaluated based on the mechanical strength, microstructural characteristics and joint strength at elevated temperature as these joints are often used for high-temperature applications. Experimental investigations were performed using micro-RSW and micro-laser spot welding to obtain the 90° peel and lap shear specimens, each comprising four spots. The obtained strength from laser joints was significantly higher than that of micro-RSW joints due to larger weld nugget formation and interface width. The process map for obtaining good quality welds was also identified, and about a 17% reduction in joint strength was obtained when welded specimens were subjected to elevated temperature (i.e., 500 °C) in comparison with room temperature. This reduction was compensated for using the flexibility of laser welding to add two extra spots. The overall performance of the micro-laser spot welds was found to be better than the micro-RSW considering joint strength, flexibility in placing the spots and time to produce the welds.
Streaming, Sharing, Stealing: Big Data and the Future of Entertainment

Traditional network television programming has always followed the same script: executives approve a pilot, order a trial number of episodes, and broadcast them, expecting viewers to watch a given show on their television sets at the same time every week. But then came Netflix's House of Cards. Netflix gauged the show's potential from data it had gathered about subscribers' preferences, ordered two seasons without seeing a pilot, and uploaded the first thirteen episodes all at once for viewers to watch whenever they wanted on the devices of their choice. In this book, Michael Smith and Rahul Telang, experts on entertainment analytics, show how the success of House of Cards upended the film and TV industries -- and how companies like Amazon and Apple are changing the rules in other entertainment industries, notably publishing and music. We're living through a period of unprecedented technological disruption in the entertainment industries. Just about everything is affected: pricing, production, distribution, piracy. Smith and Telang discuss niche products and the long tail, product differentiation, price discrimination, and incentives for users not to steal content. To survive and succeed, businesses have to adapt rapidly and creatively. Smith and Telang explain how. How can companies discover who their customers are, what they want, and how much they are willing to pay for it? Data. The entertainment industries, must learn to play a little "moneyball. " The bottom line: follow the data.