bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characterization of quaternary Heusler alloys CoFeYGe (Y = Ti, Cr) with respect to structural, electronic, magnetic, mechanical, and thermoelectric features
Authors: Charifi Zoulikha , Ghellab Torkia , Baaziz Hakim , Soyalp Fethi 
Published: June 2022

SummaryThe electronic, magnetic, elastic, and thermoelectric properties of CoFeYGe (Y = Ti, Cr) quaternary Heusler compounds are studied using DFT simulations. Our calculations show that both CoFeYGe (Y = Ti, Cr) alloys have a Type‐I atomic configuration. CoFeCrGe and CoFeTiGe compounds with band gaps of 0.640 eV and 0.489 eV, respectively, were found to display half‐metallic behavior in the minority spin channels. The total magnetic moment of CoFeCrGe was 3.00 μB, while CoFeTiGe's was 1.00 μB. CoFeTiGe and CoFeCrGe are both mechanically stable in the Y‐Type‐I structure. The surface of E is entirely distorted, demonstrating substantial anisotropy for two compounds. They have a higher anisotropic Young's modulus in the (XY), (XZ), and (YZ) planes. At 900 K, ZT is 0.31706 (0.45308) for CoFeTiGe (CoFeCrGe), corresponding to a carrier concentration of n0 = 20.4581 × 1021 cm−3 (64.5856 × 1021) cm−3. Two ways exist to enhance ZT values of CoFeTiGe and CoFeCrGe to 0.4032 and 0.64149, respectively: A charge carrier concentration of 17.392 × 1021 cm−3 for CoFeTiGe and 59.503 × 1021 cm−3 for CoFeCrGe is obtained. The second similar result is obtained by raising the chemical potential of CoFeTiGe and CoFeCrGe by 0.068 and 0.980 Ryd, respectively. To our knowledge, CoFeCrGe and CoFeTiGe exhibit exceptional spintronic and thermoelectric properties.
Untersuchung der Effektivität einer inversen Wenner‐Schlumberger‐Konfiguration
Authors: Prins Constantin , Schulz Reinhard , Thuro Kurosch 
Published: June 2022

AbstractAuf der Schwäbischen Albhochfläche, Südwestdeutschland, befindet sich die neue Hochgeschwindigkeitsbahnstrecke von Wendlingen nach Ulm der Deutschen Bahn AG in der Bauausführung. In Ergänzung zu den ausgeführten Erkundungsmaßnahmen der Baufirma (darunter mikrogravimetrische und seismische Verfahren) wurden geoelektrische Messungen in 2,5D (d. h. parallele 2D‐Profile) von der Aushubsohle aus durchgeführt. Ziel war es, die Effektivität einer inversen Wenner‐Schlumberger‐Konfiguration für die geoelektrische Karsthohlraumerkundung in einem stark heterogenen Karstgebiet abzuleiten. Die 2,5D geoelektrische Erkundung lieferte Resistivitätswerte für Mergel und Mergelsteine, einen Kalksteinuntergrund, eine Versturzdoline und einen luftgefüllten Hohlraum. Eine klare Abgrenzung zwischen den Mergeln und Mergelsteinen und dem Kalksteinuntergrund war nur außerhalb des Einflussbereiches der Versturzdoline möglich. Die Versturzdoline konnte nicht exakt von den angrenzenden geologischen Einheiten abgegrenzt werden. Einer von drei luftgefüllten Hohlräumen konnte präzise in seiner Lage und grob in seiner Größe und Form von der 2,5D geoelektrischen Erkundung abgeleitet werden. Die anderen zwei Hohlräume wurden aufgrund ihrer Lage unter einer hochresistiven Anomalie und ihrer vergleichsweise geringen maximalen horizontalen Öffnungsweite von nur 1‐mal dem verwendeten Elektrodenabstand von der Geoelektrik nicht detektiert.
Analyzing environmental heat stress under changing work conditions: A sensor‐based monitoring solution
Authors: Sharma Milap , Suri Narendra Mohan , Kant Suman , Alam Md Sarfaraz 
Published: June 2022

AbstractHot stressful work conditions impose subsequent suppressions on workers' wellbeing resulting in heat‐related morbidities, reduced productivity, and economic burden. Heat stress evaluations require costly monitoring tools that may be uneconomical while monitoring multiple locations simultaneously under the targeted workplace, especially in industrially developing countries. With recent technological advancements, sensor‐based intelligence could enable environmental heat stress monitoring at a substantially lesser price than costlier monitoring tools. In the present study, a sensor‐based approach has been utilized to develop a low‐cost data acquisition system involving widely used temperature‐humidity (THu) based indices and environmental sensors for monitoring heat stress parameters under three different work environments (i.e., indoor, outdoor, foundry). Notable variations were observed among respective work environments for the evaluated heat stress parameters. Higher heat exposures were attributable to the foundry and outdoor conditions than indoor. Based on the bivariate correlation analysis, strong associations were observed among respective indices (p < .01). For wet bulb globe temperature (WBGT), strong association was observed with modified discomfort index and fighter index of thermal stress (R2 = .979) followed by oxford index (R2 = .973) and discomfort index (R2 = .958). Australian Bureau of Metrology (ABM) WBGT approximation overestimated heat exposure values under the respective environments, indicating the approximated WBGT values monitored using THu sensor units were not wholly reliable. The absence of radiant effects and air velocity is a limiting factor in the present study. However, the proposed prototype could have additional integration capabilities w.r.t several remedial control measures like risk‐based early warning systems, automation controls, and real‐time data monitoring and analysis for multiple locations simultaneously, with potential payoffs like cost‐effectiveness and energy savings.
An optimal statistical feature‐based transformation function for enhancement of retinal images using adaptive enhanced leader particle swarm optimization
Authors: Mahapatra Sakambhari , Agrawal Sanjay 
Published: June 2022

AbstractRetinal images play a crucial role in the clinical diagnosis and detection of many eye diseases. However, the retinal image is degraded with noise and suffers from low contrast, which makes it difficult to interpret the image precisely and accurately. So retinal image enhancement becomes a vital step before any further processing. Here, a new approach is suggested for fundus image enhancement, where the image is processed in the spatial domain through an optimal statistical feature‐based transformation function (SFTF). The proposed SFTF has four tunable parameters. An optimal set of these parameters is obtained through a newly suggested adaptive enhanced leader particle swarm optimization technique. The suggested method is investigated with freely accessible DRIVE, STARE, and IDRiD databases. The efficiency of the suggested technique is assessed through different validation indices. The results reveal superior performance compared with other popular methods used for vessel enhancement.
One‐pot facile synthesis of Cu‐SAPO‐34 via addition of tetraethylenepentamine and its enhanced catalytic activity in selective catalytic reduction of NOx with NH3
Authors: Cao Yue , Chen Boyuan , Dong Yongli , Zhu Yujun , Li Zhibin 
Published: June 2022

AbstractBACKGROUNDA series of Cu‐SAPO‐34 samples were prepared with different copper sources and addition of tetraethylenepentamine (TEPA) by a one‐pot method, which were applied for selective catalytic reduction of NOx with ammonia (NH3‐SCR).RESULTSVarious measurements were carried out to investigate the effect of TEPA addition and copper sources used on sample properties. The results indicated that Cu‐SAPO‐34 obtained with the addition of TEPA using copper citrate (Cu‐SAPO‐34‐TC) displayed over 90% NOx conversion at 150–500 °C and excellent H2O and SO2 resistance in NH3‐SCR. This is because the addition of TEPA can control the formation of isolated Cu2+ species located at the junction of D6R in CHA cage, Site (I), which is regarded as a more easily approachable site to adsorbates (NH3 and NO) than others, thus leading to the excellent NH3‐SCR performance. Further study demonstrated that the Cu‐SAPO‐34‐TC catalyst shows much wider temperature window and more hydrothermal stability due to a greater amount of surface isolated Cu2+, fewer Si islands and more Al(IV) species.CONCLUSIONSThe excellent activity of the Cu‐SAPO‐34‐TC catalyst can be attributed to the addition of TEPA, which is beneficial for controlling the isolated Cu2+ at Site (I) as well as inhibiting the aggregation of CuO species. Various characterizations also confirm that more surface Cu2+ can be produced using copper citrate as copper source. © 2022 Society of Chemical Industry (SCI).
General evaluation score for predicting the development of hepatocellular carcinoma in patients with advanced liver fibrosis associated with hepatitis C virus genotype 1 or 2 after direct‐acting antiviral therapy
Authors: Tada Toshifumi , Kurosaki Masayuki , Tamaki Nobuharu , Yasui Yutaka , Mori Nami , Tsuji Keiji , Hasebe Chitomi , Joko Koji , Akahane Takehiro , Furuta Koichiro , Kobashi Haruhiko , Fujii Hideki , Ishii Toru , Marusawa Hiroyuki , Kondo Masahiko , Kojima Yuji , Yoshida Hideo , Uchida Yasushi , Nakamura Shinichiro , Izumi Namiki 
Published: June 2022

AbstractBackground and AimTo validate a composite predictive model for hepatocellular carcinoma (HCC) development in patients with advanced liver fibrosis associated with chronic hepatitis C virus (HCV) who have received direct‐acting antiviral (DAA) therapy and achieved sustained virologic response (SVR).MethodsThis study included 1258 patients with advanced liver fibrosis associated with HCV genotype 1, 2, or both. General evaluation score (GES), which is based on sex, age, fibrosis stage, albumin, and α‐fetoprotein, was used as a composite predictive model.ResultsThere were 645 (51.3%) patients in the low‐risk group, 228 (18.1%) in the intermediate‐risk group, and 385 (30.6%) in the high‐risk group based on GES categories. The 12‐, 36‐, and 60‐month cumulative incidence of HCC was 0.7%, 5.3%, and 13.0%, respectively. Multivariable analysis with Cox proportional hazards models showed that male sex (hazard ratio [HR], 1.863; 95% confidence interval [CI], 1.204–2.883), F4 fibrosis stage (HR, 3.199; 95% CI, 1.696–6.036), and albumin (HR, 0.489; 95% CI, 0.288–0.828) are independently associated with HCC development. The incidence of HCC differed significantly by GES‐based risk category (P < 0.001). Cox proportional hazards models showed that, with the low‐risk group as the referent, the HR for HCC development was 1.875 (95% CI, 1.000–3.514) in the intermediate‐risk group and 2.819 (95% CI, 1.716–4.630) in the high‐risk group. GES had better predictive ability for HCC development than fibrosis‐4 index according to time‐dependent receiver operating characteristic analysis.ConclusionGES is useful for predicting HCC development in patients with advanced liver fibrosis after SVR.
Effects of an alternative bleaching method for yerba mate leaves on total phenolic content: evaluation and prediction with soft‐computing approaches
Authors: Nomura Vitor Hiroyuki , Moreira Beatriz Godoy Martins , Carniel Anderson Chaves , Pereira Edimir Andrade , Johann Gracielle 
Published: June 2022

AbstractBACKGROUNDThe effects of an alternative bleaching method on the total phenolic content (TPC) and antioxidant activity (AA) of yerba mate extracts were evaluated. Traditional bleaching (‘zapeco’) was compared with submerging the leaves in water followed by a hot air oven‐drying process. Seven different approaches, i.e. linear model (LM), response surface model (RSM), Mamdani, Larsen, adaptive neuro‐fuzzy inference system (ANFIS) with the product (Prod) and the minimum (Min) operators, and ANFIS with automatically membership functions (Auto), were employed to compare the TPC of yerba mate extracts based on drying temperature and AA assays.RESULTSThe results showed that if leaves were bleached followed by drying at higher temperatures, we obtained higher AA and TPC values. For submerging bleaching treatment, RSM model delivered the best accuracy measures with a mean absolute error (MAE), average absolute percentage error (MAPE), and mean squared error (MSE) of 0.128, 0.006, and 0.028, respectively. The ANFIS Auto model was the best for traditional bleaching treatment, with MAE, MAPE, and MSE of 0.490, 0.013, and 0.612, respectively.CONCLUSIONThe results suggest a second‐order linear relation between drying temperature, AA assays to TPC, and a high level of relation complexity of drying temperature, AA assays, and TPC. The evaluated soft‐computing approaches have the excellent ability to estimate TPC from bleached leaves. © 2022 Society of Chemical Industry.
Cathodic control using cellular automata approach
Authors: Zenkri Mariem , di Caprio Dung , Raouafi Fayçal , Féron Damien 
Published: June 2022

AbstractWe present a stochastic three‐dimensional cellular automata model of aqueous corrosion. We consider the cathodic reaction with dissolved oxygen and different concentrations of the oxidizer. We study the role and the stability of the passive layer and its effect on the kinetics, surface morphology, and roughness of the metallic surface. The model considers balanced spatially separated anodic and cathodic reactions and is capable of illustrating the cathodic control of the corrosion rate. Besides the electrochemical reactions, we take into account ionic diffusion, and acidic/basic neutralization. Results are compared to the aqueous corrosion of Fe in a near‐neutral solution.
Implement high impact practices to increase student engagement, success
Authors: Sutton Halley 
Published: June 2022

WASHINGTON, D.C. — At a virtual session at the annual conference for the Association of American Colleges and Universities, Tracie Clifford, an Instructor and Master Faculty of high impact practices at Chattanooga State Community College, shared how her institution has implemented HIPs and overhauled course design to better meet the needs of student success.
Weight changes in patients with sustained viral suppression switching tenofovir disoproxil fumarate to tenofovir alafenamide
Authors: Schafer Jason J. , Zimmerman Matty , Walshe Ciara , Cerankowski Jesse , Shimada Ayako , Keith Scott W. 
Published: June 2022

AbstractObjectiveSwitching from tenofovir disoproxil fumarate (TDF)‐ to tenofovir alafenamide (TAF)‐containing antiretroviral therapy may negatively influence weight, cholesterol, and atherosclerotic cardiovascular disease risk. The extent of these changes and their association with TAF remain unclear.MethodsThis retrospective cohort evaluated metabolic changes in virologically suppressed patients with HIV infection who switched from TDF to TAF without switching other antiretroviral therapy medications. Adult patients on TDF and with no HIV viral load values >200 copies/mL for ≥2 years prior to and following a TAF switch were included. Weight and other variables were collected for 2 years before and after the switch. Longitudinal linear mixed‐effects models evaluated changes at 1 and 2 years after the switch.ResultsIn the unadjusted analysis, there were increases in weight, BMI, total cholesterol, low‐density lipoprotein cholesterol, high‐density lipoprotein cholesterol, triglycerides, systolic blood pressure, fasting glucose, and atherosclerotic cardiovascular disease risk scores 2 years after switching to TAF (each p ≤ 0.03). However, only increases in total and low‐density lipoprotein cholesterol were associated with TAF and were significantly different from expected changes predicted in the adjusted longitudinal models.ConclusionsDespite observing significant unadjusted metabolic changes after switching to TAF, only changes in cholesterol were associated with TAF and were different from changes expected in time‐trend adjusted models.
Can Thailand achieve COVID‐19 herd immunity?
Authors: Jitanan Manatee , Chirasatienpon Tharisara , Tiamjan Rapeeporn , Amnatsatsue Kwanjai , Nguanjairak Rachanon , Miranda Adriana Viola , Lin Xu , Gyeltshen Dawa , Vicerra Paolo Miguel Manalang , Kouwenhoven M. B. N. 
Published: June 2022

AbstractThe COVID‐19 outbreak has had a great impact on the social, economic, and health systems of Thailand. A variety of measures to curb the spread of the disease were implemented since the beginning of the pandemic, including a strict national lockdown protocol. The Thai government aimed to achieve herd immunity through an efficient vaccination programme. Initially, vaccine supply shortage and a lack of vaccine options plagued the health system, but this has since been improved. Continuous monitoring of the situation through research is being carried out to assess the level of immunity among the population whereby the current general recommendation is presently a fourth booster dose for adults. Hurdles towards achieving herd immunity remain. One such issue is the low level of vaccine literacy among those that are unvaccinated or inadequately vaccinated. Another obstacle is the sizeable rate of hesitancy towards getting booster doses. Achieving herd immunity in the Thai population would require multilateral cooperation, improved health promotion to target population groups, such as older adults, and a developed distribution system for those with limited access, such as those in the rural areas.
Das Space Cube der SEH Engineering
Authors: Geske Heinz , Kiehn Diethard 
Published: June 2022

AbstractAuf dem Werksgelände der SEH Engineering GmbH in Hannover ist ein multifunktionales und hochmodernes Bürogebäude entstanden, das eindrucksvoll die nahezu unendlichen Einsatzmöglichkeiten des Werkstoffs Stahl zeigt. Die Aufgabenstellung war kurz und knackig: einen Raum schaffen für ein Klima der Offenheit, wo inspirierendes Denken, Begeisterung und Fokussierung auf die Aufgaben – frei von Mustern – gefördert wird. Ein Bauwerk mit einer klaren Formensprache, dessen Design sich deutlich vom üblichen Bürostandard abhebt. Man spürt förmlich von außen wie von innen: Hier wird gern mit dem Werkstoff Stahl gearbeitet. Durch die sichtbare Stahlstruktur im Inneren entsteht ein Loftcharakter. Der kubusartige Baukörper hat klare Gebäudekanten, die Gebäudehülle lässt sich sehr gut mit dem Werkstoff Holz kombinieren. Große, bodentiefe Verglasungen schaffen eine freundliche und offene Atmosphäre mit ausreichend Tageslicht. Jalousien, die bei Bedarf hinter der Fassade verschwinden, sorgen für einen wirksamen Blend‐ und Sonnenschutz. Auf nur acht Stahlrundstützen ruhend, hat das Gebäude einen schwebenden Charakter, der Raum darunter kann als Parkfläche und für andere Zwecke genutzt werden. Das Gebäude ist ca. 30 m lang, die Breite beträgt im Regelbereich ca. 9 m mit einer Höhe von 10,70 m. Das Space Cube wählt statt Einzelbüros Open‐Space‐Büros, in denen Fachteams zusammen Platz finden, mit offener Raumstruktur, gelockerter Arbeitsatmosphäre und ausgestattet mit modernster Technik.
Predictive analytics beyond time series: Predicting series of events extracted from time series data
Authors: Mishra Sambeet , Bordin Chiara , Taharaguchi Kota , Purkayastha Adri 
Published: June 2022

AbstractRealizing carbon neutral energy generation creates the challenge of accurately predicting time‐series generation data for long‐term capacity planning and for short‐term operational decisions. The key challenges for adopting data‐driven decision‐making, specifically predictive analytics, can be attributed to data volume and velocity. Data volume poses challenges for data storage and retrieval. Data velocity poses challenges for processing the data near real time for operational decisions or for capacity building. This manuscript proposes a novel prediction method to tackle the above two challenges by using an event‐based prediction in place of traditional time series prediction methods. The central concept is to extract meaningful information, denoted by events, from time‐series data and use these events for predictive analysis. These extracted events retain the information required for predictive analytics while significantly reducing the volume of the velocity of data; consequently, a series of events present the information at a glance, effectively enabling data‐driven decision‐making. This method is applied to a data set consisting of six years of historical wind power capacity factor and temperature measurements. Deploying five deep learning models, a comparison is drawn between classical time‐series predictions and series of events predictions based on computational time and several error metrics. The computational analysis results are presented in graphical format and a comparative discussion is drawn on the prediction results. The results indicate that the proposed method obtains the same or better prediction accuracy while significantly reducing computational time and data volume.
Roles of Middle Managers in Agile Project Governance
Authors: Uwadi Maduka , Gregory Peggy , Allison Ian , Sharp Helen 
Published: June 2022

AbstractProject governance is an important activity in agile software development (ASD) projects for project success. Middle managers are part of the governance structure in ASD projects. Despite the efficacy of project governance and existence of middle managers in agile teams, project governance and middle management in ASD projects are under-researched. This multiple-case study investigates the roles of middle managers in agile project governance activities within two Nigerian ASD projects through the lens of activity theory. We collected data in semi-structured interviews, observations, questionnaires, and company documents. Our findings show that middle managers performed 25 roles related to planning and coordination for project alignment and execution, continuous improvement and organisational change, agile and technical leadership, monitoring, and capability building. We conclude that middle managers are pivotal to project governance practice and the effectual functioning of agile teams in ASD projects. The study will help agile practitioners to better understand the roles of middle managers in agile project governance. Results from this work contribute to the ‘middle management in agile’ debate and offer an alternative view that may change beliefs about middle managers in agile project settings.
Understanding Leadership in Agile Software Development Teams: Who and How?
Authors: Weichbrodt Johann , Kropp Martin , Biddle Robert , Gregory Peggy , Anslow Craig , Bühler Ursina Maria , Mateescu Magdalena , Meier Andreas 
Published: June 2022

AbstractThe principles in the Agile Manifesto, the Scrum Guide and most other approaches to agile software development emphasize self-organizing teams, but rarely address issues of leadership. In this paper we report on a study of the nature of different aspects of leadership in agile teams. We used an established model of leadership, distinguishing transactional and transformational styles, and asked IT professionals a set of questions about the leadership they experience, both from direct supervisors (hierarchical leadership) and from the team itself (shared leadership). We determined correlation measures of these four types of leadership with the extent of agility in the whole organization. Our results show that agility is indeed related to the transformational style, but that the transactional style also plays a part, especially as shared leadership. Furthermore, even in highly agile software development, leadership by direct supervisors still plays an important role. We propose that, as software development becomes more agile, the transactional aspects of leadership may shift away from the leadership dyad between supervisor and employee into the agile team, while transformational leadership is important for both the team and supervisors. We discuss our results in light of applications for both research and practice.