bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effects of imagery training on free-throw accuracy among young basketball players
Authors: Slančo Matúš 
Published: March 2022

Abstract

Objectives
The influence of mental imagery training on the performance of adolescent basketball players in free-throw task was examined using an experimental design and the results revealed significantly better improvement among players who practiced using mental imagery compared to the control group.

Methods
The training program was based on adjusted MIIMS imagery model, and 81 basketball players (aged 13–17) from five junior competition-level teams were divided into two groups: an experimental group and a control group, where players practiced free throws only physically. Players from both groups underwent a total of 14 training sessions at the end of practices during a 7-week period. Their performance in a free-throw task was measured pre- and post-intervention along with multiple factors that could influence changes in performance.

Results
Comparison of groups with both parametric and non-parametric tests revealed a significant improvement in the experimental group and non-significant improvement in the control group. Furthermore, correlation and regression analyses discovered several statistically significant factors that might influence the performance change.

Conclusions
The findings not only help in understanding the role of imagery in training routines of young athletes, but they also reveal several methodological implications for future research.
Effect of Re and Ru additions on morphology and long-term stability of gamma prime particles in new modified superalloys prepared by a vacuum arc melting process
Authors: Tapalad Weerachai , Kiatwisarnkij Napat , Rojhirunsakool Tanaporn , Nisaratanaporn Ekasit , Lothongkum Gobboon , Wangyao Panyawat 
Published: March 2022

Abstract
This research investigated the effects of adding rhenium and ruthenium with various contents to new modified nickel-based superalloys, which were prepared and cast using a vacuum arc melting process. Heat treatment processes were then carried out. The size, circularity and the area fraction of the gamma prime phase were characterized via scanning electron microscopy after solution treatment, precipitation aging and long-term heating processes. The addition of ruthenium seems to provide a stronger effect than adding rhenium by increasing the area fraction of the gamma prime phase after precipitation aging. Furthermore, rhenium and/or ruthenium additions maintain the precipitation of the gamma prime particles in a cubic shape. For phase stability analyses, the alloys were subsequently heated at 1173 K in intervals up to 1080 ks. The study showed that the coarsening rate of γ′ particles can be significantly retarded with the addition of rhenium and/or ruthenium, and topologically close-packed phase can occur with excessive rhenium addition. In addition, the highest addition of ruthenium content in this study strongly exhibited high gamma prime phase stability. Thus, increasing the content of ruthenium and decreasing the content of rhenium can inhibit the formation of the topologically close-packed phase.
Mechanical behavior of a friction welded AA6013/AA7075 beam
Authors: Kocar Oguz , Yetmez Mehmet , Baysal Erhan , Ozyigit Hamdi Alper 
Published: March 2022

Abstract
In this study, mechanical responses of a friction welded AA6013/AA7075 aluminum alloy beam are investigated. For this purpose, the experimental study is conducted with two different friction welding parameters (i.e., rotational speed and welding pressure) and two constant friction welding parameters (i.e., friction pressure and contact time). Microstructural and mechanical performance analyses (i.e., macrohardness and tensile measurements) are considered to determine the weld quality. Effects of speed and welding pressure on the vibration characteristics/structural performances are also examined experimentally. Advantages of using vibration analysis are discussed to understand the effects of different weld parameters. Results are given in tabular and graphical forms.
The critical incident negotiation process of public librarians in Aotearoa New Zealand
Authors: Pierson Cameron M. 
Published: March 2022

Abstract
This paper reports findings from interviews with practicing public librarians in Aotearoa New Zealand. It details respondent understanding of influences on perception and behaviour, and critical incidents as they relate to librarian professional identity. In-depth semi-structed interviews were conducted with forty practicing public librarians. Interviews were analysed with an inductive approach. Findings report on sample tendencies of dominant influences on practitioners’ perception and behaviour, impacting professional identity development over time. Dominant influences are respondent understanding of the strongest aspect they understand to influence their professional identity for both their individual perception of their professional identity and social factors influencing their professional behaviour. Findings also report on the identity negotiation process prompted by critical incidents, whose criticality is reliant on individual perception of incident in relation to professional identity. This process outlines affective response to the critical incident as a gateway to identity negotiations, leading to a discovery and/or growth of an identity facet, which will either affirm or undermine identity understanding. This process may be iterative, as meaning ascribed to the incident may change over time. Three theoretical propositions are presented articulating the role of dominant influences and critical incidents on identity negotiations of public librarian professional identity.
Microstructural and Impact Considerations of Heat Affected Zone in Gas Tungsten Arc Welding of Armor Steel
Authors: Akca Cem , Karaaslan Ahmet 
Published: March 2022

Abstract
Gas tungsten arc welding is a preferred welding process due to its excellent heat control which provides high quality joinings of various metals. Welded armor steels are widely used in armored vehicles for the ease of production. Thus, characterization of gas tungsten arc welding of armor steels reveals important data on both present applications and potential uses of gas tungsten arc welding in future. In this study, microstructural and mechanical properties of welded armor steel were investigated. Optimal welding parameters depending on a previous research were used to eliminate welding defects. The results have shown that application of pre-heating and/or multi-pass welding on armor steel could provide fine and homogeneously dispersed carbides in heat affected zone.
An overview of quinoxaline synthesis by green methods: recent reports
Authors: Yadavalli Venkata Durga Nageswar , Katla Ramesh 
Published: March 2022

Abstract
Quinoxalines and their derivatives belong to an important class of bicyclic aromatic heterocyclic system, also known as benzopyrazines, containing a benzene ring and a pyrazine ring. They have attracted considerable attention over the years due to their potential biological and pharmaceutical properties. A wide range of synthetic strategies is reported in this significant area of research. The present review showcases recent research advances in the synthesis of quinoxaline derivatives following environmentally benign approaches.
Dariusz Leszczynski responds to comments of Maël Dieudonné on Leszczynski’s review of the scientific evidence on the individual sensitivity to electromagnetic fields (EHS)
Authors: Leszczynski Dariusz 
Published: March 2022

Abstract
While Dieudonné has praised thoroughness of Leszczynski’s review of EHS studies, he was critical of the final conclusions. Leszczynski strongly disagrees with argumentation of Dieudonné that EHS issue is settled and that biomarker research is unnecessary because it is expensive and might produce false positives. Leszczynski’s opinion is that his review has demonstrated how very poor scientifically and inadequate statistically is the to-date executed research on EHS. Dieudonné’s approach of using such poor science to justify claim that EHS issue is settled and there is no causality link between EHS and EMF exposures, is completely unjustified and simply false.
Systematische Diversifikation
Authors: Schuh Günther , Graw Myron 
Published: March 2022

Abstract
Technologische Kompetenzen umfassend zu nutzen heißt neue Geschäftsfelder zu erschließen und nachhaltiges Wachstum zu generieren. Jedoch sind heutige Wettbewerbsarenen zunehmend dynamisch und die Entwicklung von Märkten ist mit großer Unsicherheit behaftet. In vielen Fällen wird daher versucht, sinkenden Absätzen in ursprünglich rentablen Kernmärkten durch Diversifikation zu begegnen. Allerdings werden Diversifikationsbestrebungen zumeist auf Grund inkonsistenter Ziele, fehlender Informationsquellen oder mangelnder Orientierung in neuen Märkten oftmals nicht erfolgreich umgesetzt. Die nicht exakt vorhersagbare Entwicklung von Märkten und Technologien wird auch weiterhin als bedeutende Rahmenbedingungen im Diversifikationsprozess bestehen bleiben. Dennoch kann durch ein systematisches Vorgehen einem Teil dieser Unsicherheiten begegnet und so ein besseres Endergebnis erzielt werden.
Produzieren in Hochlohnländern
Authors: Scherrer-Rathje Maike , Deflorin Patricia 
Published: March 2022

Abstract
Standorte in Hochlohnländern können in guter, wie auch in angespannter Wirtschaftslage erfolgreich agieren. Während in einer guten Wirtschaftslage Strategien verfolgt werden, welche die Adressierung mehrerer Differenzierungsfaktoren beinhalten, werden in einer angespannten Wirtschaftslage klare strategische Fokussierung gelegt. Beiden Wirtschaftslagen ist gemeinsam, dass Maßnahmen und Fähigkeiten auf die anvisierte Strategie abzustimmen sind.
Anforderungen an intralogistische Anlagen
Authors: Riekhof Florian , Bielefeld Ovidiu , Esser Christian , Winzer Petra 
Published: March 2022

Abstract
Der Forderung nach hoher Zuverlässigkeit intralogistischer Anlagen wird oft durch Überdimensionierung von Antrieben und Bauteilen Folge geleistet, was in höheren Anschaffungs- und Betriebskosten resultiert. Eine Alternative zu Systemen wie Rollenförderern können Linearantriebe darstellen. Um diese anforderungsgerecht auszulegen und Kenntnis über Komponenten, deren Entwicklung und Problemen hierbei zu gewinnen, wurden in einer Industriebefragung Anforderungen von Herstellern und Nutzern intralogistischer Anlagen erhoben und analysiert.*
Prozessgestützte Umsetzung einer Instandhaltungsstrategie
Authors: Huber Thomas , Loos Manuel Norbert 
Published: March 2022

Abstract
Prozessuale und systemtechnische Veränderungen müssen von Beginn an professionell angeleitet werden, um die Umstellung zum Erfolg zu führen. Im Rahmen einer neuen Instandhaltungsstrategie wird bei der AUDI AG in einem stufenweisen Rollout ein neues Prozessmodell zusammen mit einer IT-Lösung in der Instandhaltung eingeführt. Die Abwicklung des Projekts wurde dabei von Anfang an unter den Gesichtspunkten des Change Managements durchgeführt. Die Vorgehensweise und Umsetzung werden in diesem Beitrag beschrieben.
Störungsmanagement in einer Baustellenmontage
Authors: Hund Eric , Bohlmann Sebastian , Ullmann Georg 
Published: March 2022

Abstract
Störungen, wie z. B. ein defektes Werkzeug, führen häufig im Ablauf einer Baustellenmontage zu Verzögerungen und dazu, dass die Montagesteuerung kurzfristig einen neuen Montageablauf festlegen muss, um negative Folgen zu vermeiden. In diesem Beitrag wird ein Forschungsprojekt vorgestellt, welches die Entwicklung einer Methode zum Ziel hat, in der Online-Simulation eingesetzt wird, um schnell günstige Alternativpläne zu identifizieren und anhand unternehmensindividueller Zielgrößen zu bewerten.*
Energieeffiziente Produktionsplanung und -regelung
Authors: Hering Niklas , Brandenburg Ulrich , Kropp Sebastian 
Published: March 2022

Abstract
Gegenstand des Beitrags ist ein Ansatz für eine energieeffiziente Produktionsplanung und -regelung. Dieser überträgt kybernetische Planungslogiken auf die Produktionsplanungs- und ‑steuerung für energieeffiziente Produktionssysteme. Notwendige Voraussetzung hierfür ist die echtzeitnahe Verarbeitung von Shop Floor-Daten. Durch die Verknüpfung einer ereignisorientierten Architektur mit kybernetischen Planungslogiken kann somit ein anpassungsfähiges, adaptives Produktionssystem realisiert werden, welches den Anforderungen volatiler Energiemärkte gerecht wird.
Causal Evidence for the Multiple Demand Network in Change Detection: Auditory Mismatch Magnetoencephalography across Focal Neurodegenerative Diseases
Authors: Cope Thomas E. , Hughes Laura E. , Phillips Holly N. , Adams Natalie E. , Jafarian Amirhossein , Nesbitt David , Assem Moataz , Woolgar Alexandra , Duncan John , Rowe James B. 
Published: March 2022

The multiple demand (MD) system is a network of fronto-parietal brain regions active during the organization and control of diverse cognitive operations. It has been argued that this activation may be a nonspecific signal of task difficulty. However, here we provide convergent evidence for a causal role for the MD network in the “simple task” of automatic auditory change detection, through the impairment of top-down control mechanisms. We employ independent structure-function mapping, dynamic causal modeling (DCM), and frequency-resolved functional connectivity analyses of MRI and magnetoencephalography (MEG) from 75 mixed-sex human patients across four neurodegenerative syndromes [behavioral variant fronto-temporal dementia (bvFTD), nonfluent variant primary progressive aphasia (nfvPPA), posterior cortical atrophy (PCA), and Alzheimer's disease mild cognitive impairment with positive amyloid imaging (ADMCI)] and 48 age-matched controls. We show that atrophy of any MD node is sufficient to impair auditory neurophysiological response to change in frequency, location, intensity, continuity, or duration. There was no similar association with atrophy of the cingulo-opercular, salience or language networks, or with global atrophy. MD regions displayed increased functional but decreased effective connectivity as a function of neurodegeneration, suggesting partially effective compensation. Overall, we show that damage to any of the nodes of the MD network is sufficient to impair top-down control of sensation, providing a common mechanism for impaired change detection across dementia syndromes.SIGNIFICANCE STATEMENTPrevious evidence for fronto-parietal networks controlling perception is largely associative and may be confounded by task difficulty. Here, we use a preattentive measure of automatic auditory change detection [mismatch negativity (MMN) magnetoencephalography (MEG)] to show that neurodegeneration in any frontal or parietal multiple demand (MD) node impairs primary auditory cortex (A1) neurophysiological response to change through top-down mechanisms. This explains why the impaired ability to respond to change is a core feature across dementias, and other conditions driven by brain network dysfunction, such as schizophrenia. It validates theoretical frameworks in which neurodegenerating networks upregulate connectivity as partially effective compensation. The significance extends beyond network science and dementia, in its construct validation of dynamic causal modeling (DCM), and human confirmation of frequency-resolved analyses of animal neurodegeneration models.
Untreated thyroid autoantibody-negative SCH increases the risk of spontaneous abortions
Authors: Yuan Ning , Sun Jianbin , Zhao Xin , Du Jing , Nan Min , Zhang Qiaoling , Zhang Xiaomei 
Published: March 2022

Background
Numerous studies have found that subclinical hypothyroidism (SCH) may increase adverse pregnancy outcomes; however, the benefit of levothyroxine (LT4) treatment remains controversial. The 2017 guidelines of the American Thyroid Association weakly recommended LT4 therapy for serum antithyroid peroxidase antibody (TPOAb)-negative women with thyroid-stimulating hormone (TSH) concentrations greater than the pregnancy-specific reference range and below 10.0 mU/L. Therefore, the primary goal of this study was to investigate the correlation between thyroid autoantibody-negative SCH with or without LT4 treatment and adverse pregnancy outcomes.

Methods
We prospectively enrolled 1868 consecutive pregnant women. Finally, 1344 women were involved in the study according to the inclusion and exclusion criteria. Assays for TSH, free thyroxine (FT4), TPOAb, anti-thyroglobulin antibody, and laboratory indicators were performed. The participants were divided into the euthyroid (ET) group (n  = 1250) and the SCH group(n  = 94). The SCH group was further divided into LT4 group (n  = 40) and non-LT4 group(n  = 54). The laboratory indicators and pregnancy outcomes were evaluated during follow-ups.

Results
Maternal age, BMI, parity, and the history of spontaneous abortion did not differ significantly between the ET group and the different SCH groups. There were no significant differences in lipid profile and homocysteine levels between ET and SCH group in the first and third trimester of pregnancy. After adjusting the confounding factors, the non-LT4 group was a risk factor for spontaneous abortion (odds ratio: 3.141, 95% CI: 1.060–9.302). Survival analysis showed that the time of abortion was different between the ET group and SCH group (log-rank P= 0.042). The spontaneous abortion in SCH, especially in non-LT4, group mainly occurred in the first trimester of pregnancy.

Conclusions
Thyroid autoantibody negative-SCH seems to be associated with increased risk of spontaneous abortions during the first trimester of pregnancy. LT4 therapy in this patient population might be beneficial to reduce adverse pregnancy outcomes.
Serum irisin levels increase in girls with central precocious puberty not dependent on BMI: a pilot study
Authors: Chen Yanfei , Li Mei , Liao Binrong , Zhong Jingzi , Lan Dan 
Published: March 2022

Objective
The objective of this study is to investigate the role of serum irisin level in diagnosis of central precocious puberty (CPP) in girls and its major determinants.

Methods
This study was conducted in 67 girls with CPP, 19 girls with premature thelarche (PT) and 59 normal controls. The major determinants of irisin were assessed by multivariate linear regression (MLR) analysis. Propensity score matching (PSM) analysis was performed to minimize the bias that can result from BMI. A receiver operating characteristic curve was used to obtain the optimal threshold value of irisin.

Results
The girls with CPP and PT had higher irisin levels than controls (P  < 0.05). The optimal cutoff value of irisin levels for predicting CPP was 91.88 ng/mL, with a sensitivity of 70.1% and a specificity of 72.9%. MLR analysis showed that BMI was a predictor of irisin (P  < 0.05). Serum irisin levels remained higher in the CPP girls than the controls with adjustment for BMI (P  < 0.05).

Conclusions
Increased serum irisin levels with CPP suggest that irisin is involved in puberty. However, due to low sensitivity and specificity, irisin level can only be used as an auxiliary indicator rather than a single diagnostic indicator of CPP.
Impact of COVID-19 on Admissions and Outcomes for Children With Complex Chronic Conditions
Authors: Markham Jessica L. , Richardson Troy , Teufel Ronald J. , Hersh Adam L. , DePorre Adrienne , Fleegler Eric W. , Antiel Ryan M. , Williams Daniel C. , Hotz Arda , Wilder Jayme L. , Shah Samir S. 
Published: March 2022

BACKGROUNDAlthough pediatric health care use declined during the coronavirus disease 2019 (COVID-19) pandemic, the impact on children with complex chronic conditions (CCCs) has not been well reported.OBJECTIVETo describe the impact of the pandemic on inpatient use and outcomes for children with CCCs.METHODSThis multicenter cross-sectional study used data from the Pediatric Health Information System. We examined trends in admissions between January 2020 through March 2021, comparing them to the same timeframe in the previous 3 years (pre-COVID-19). We used generalized linear mixed models to examine the association of the COVID-19 period and outcomes for children with CCCs presenting between March 16, 2020 to March 15, 2021 (COVID-19 period) to the same timeframe in the previous 3 years (pre-COVID-19).RESULTSChildren with CCCs experienced a 19.5% overall decline in admissions during the COVID-19 pandemic. Declines began in the second week of March of 2020, reaching a nadir in early April 2020. Changes in admissions varied over time and by admission indication. Children with CCCs hospitalized for pneumonia and bronchiolitis experienced overall declines in admissions of 49.7% to 57.7%, whereas children with CCCs hospitalized for diabetes experienced overall increases in admissions of 21.2%. Total and index length of stay, costs, and ICU use, although statistically higher during the COVID-19 period, were similar overall to the pre-COVID-19 period.CONCLUSIONSTotal admissions for children with CCCs declined nearly 20% during the pandemic. Among prevalent conditions, the greatest declines were observed for children with CCCs hospitalized with respiratory illnesses. Despite declines in admissions, overall hospital-level outcomes remained similar.
Influence of the composition of high-strength concrete and mortar on the compressive fatigue behaviour
Authors: Oneschkow Nadja , Timmermann Tim 
Published: March 2022

AbstractThe results of compressive fatigue investigations on four high-strength concretes and their corresponding mortars are presented. The influences of coarse aggregates generally, the substitution of basalt coarse aggregate by granite, the addition of silica fume and the variation of the water to cement (w/c) ratio are investigated systematically. The numbers of cycles to failure, the developments of strain, stiffness, dissipated energy and acoustic emission hits are focused on in the analyses. The results clearly show that coarse aggregates can influence the fatigue behaviour of concretes in a negative way at higher stress levels and in a positive way at lower stress levels compared to mortars. The granite coarse aggregate decreases the adverse effect at higher stress levels due to its lower modulus of elasticity compared to that of the basalt aggregate. Silica fume improves the fatigue behaviour of concrete and mortar strongly. The increase of the w/c ratio and, thus, the increase in porosity reduces the fatigue resistance of concrete and mortar significantly, due to the weakening of the mortar matrix and of the interfacial transition zone. The results demonstrate the interaction of the coarse aggregates and the mortar matrix with their specific properties, which leads to a certain fatigue behaviour. The acoustic emission gives additional valuable strain-independent information of the damage processes occurring, possibly also on micro- and nanoscales.