bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploring the opportunity for a hybrid methodology in project management: a focus group approach
Authors: Bagiu N , Avasilcăi S , Alexa L 
Published: August 2020

Abstract
Nowadays, project-based work is no longer a challenge for a today company. Optimizing the workforce, better managing the results, delivering in time, quality and budget (the triple constrains [1]) are just a few of the advantages. Still, to re-organize an entire company into a project-based organization requires a lot of efforts and energy across its departments and teams. However, some companies step forward and change the project management methodologies multiple times. That brings another wave of changes, stress and reorganizations combined with a complex organizational phenomenon, which requires far more effort than just to replace the current tools and technologies with new ones [2]. Thus, the main purpose of this paper is to reflect and present the results of the workshop called “Going Agile – the journey”, which was held on Project Management Forum 2019, a Conference organized inside of Continental Automotive Romania for all project managers working in the company. Based on the focus group technique there was identified the main struggles associated with the adoption of Agile methodology within Automotive Industry, the similarities with the plan-driven methodologies and willingness to advance the agility in company’s daily working life.
Simulation modelling as a method of risk analysis in real estate valuation
Authors: Gromova E A , Pupentsova S V 
Published: August 2020

Abstract
The advent of the fourth industrial revolution was marked by the fact that changes became the main characteristics of the new time. It means a high level of uncertainty and instability in the business environment. The real estate market, being a part of the investment market, is changing. The current development of Russia’s investment potential leads to an increasing need for professional management of the profitability of such investments. Thus, the main goal of this research is to present non-traditional methods of risk assessment, which should be used in determining the market value of the real estate object at the present time. Simulation modelling is a method of research in which the system under study is replaced by a model that describes the real system with sufficient, with which experiments are conducted in order to obtain information about this system. An example of the application of simulation modelling in the analysis for the purpose of choosing the best and most effective use of a land plot as conditionally free is given. Financing of investment projects is a dynamic process that requires a risk assessment.
A simplified yet enhanced and versatile microfluidic platform for cyclic cell stretching on an elastic polymer
Authors: He Yingning , Mao Tianjiao , Gu Yexin , Yang Yuqian , Ding Jiandong 
Published: August 2020

Abstract
While the microfluidic chips for cell stretching and real-time cell observations have so far been composed of three layers, the present work reports a two-layer one, which is, on the surface, not available due to the ‘inherent’ difficulty of unstable focusing on cells in the microscopic observation under the stretching operation, etc. Herein, this difficulty was overcome to a large extent, in the case of appropriate device parameters, which were determined based upon finite element analysis and orthogonal experimental design. The novel chip was fabricated and confirmed to work in frequency up to 2 Hz and stretching ratio up to 20%. We further performed uniaxial stretching experiments of human mesenchymal stem cells on an elastic polymer, polydimethylsiloxane, and the cells were found to be highly oriented perpendicular to the stretching direction. The short working distance on this simplified two-layer chip enabled clear observation of microtubules and stress fibers of cells under an optical microscope. We also tested radial stretching and gradient stretching as proofs of concept of the extendibility of this type of chip. Therefore, in spite of being simpler, the two-layer chip suggested in this study exhibited enhanced and versatile functions, and the present work has thus afforded a new methodology of fabrication of microfluidic chips for the study of cells on biomaterials under a mechanical stimulus.
Fabrication of thermal energy storage wood based on graphene aerogel encapsulated polyethylene glycol as phase change material
Authors: Lin Xianxian , Jia Shifang , Liu Jingyi , Wang Wenbin , Cao Huimin , Guo Xi , Sun Weisheng 
Published: August 2020

Abstract
Thermal energy storage wood (TESW) was fabricated by using graphene aerogel encapsulated polyethylene glycol (PEG) as phase change material and wood as the matrix. The microstructure of TESW was investigated by scanning electron microscope (SEM), the thermal properties of TESW was determined by differential scanning calorimetry (DSC), thermal gravimetric analysis (TG) and laser flash diffusivity apparatus (LFA). The results showed that: (1) graphene aerogel (GA) encapsulated PEG composite was founded in the lumens of wood, there was no apparent interface between PEG and graphene aerogel; (2) the melting and freezing enthalpy of TESW were 11.81 and 27.91 J g−1, respectively. The melting and freezing point were 20 °C and 15 °C, respectively, which were suitable for human comfortable temperature; (3) incorporation of graphene aerogel improved the thermal conductivity of TESW apparently. Thermal conductivity of TESW was 0.374 W (m*K)−1, which increased about 274% compared to pure wood; (4) TG and hygroscopicity test indicated that the TESW had excellent thermal and dimensional stability. The TESW was suggested as energy conservation building material for indoor temperature regulating due to its comfortable phase change temperature and prior latent heat.
26 Results of hyperbolic partial differential equations in B-poly basis
Authors: Bhatti Muhammad I , Hinojosa Emilio 
Published: August 2020

Abstract
A two-variable process to estimate results of Hyperbolic Partial Differentiation (HPD) equations in a B-Polynomial (B-Poly) bases is established. In the proposed process, a linear product of variable coefficients and B-Polys is manipulated to express the predicted solution of the HPD equation. The variable coefficients of the linear mixture in the results are concluded using Galerkin technique. The HPD equation is converted into a matrix which when inverted provided the unknown coefficients in the linear mixture of the solution. The anticipated solution is constructed from the variable coefficients and B-Poly basis set as a product with initial conditions implemented. Both the effectiveness and precision of the process depend on the number of B-Polys employed in the results and degree of the B-polys utilized in the linear sequence. The current process is applied to solve four linear examples of the HPD equations with various initial conditions. An excellent agreement was found between exact and estimated results and in some cases estimates were exact. The current process renders a higher degree of efficiency and accuracy for solving the HPD equations. The process can be easily employed in other fields such as physics and engineering to solve complex PDEs in two variables.
Visualizing one-dimensional non-hermitian topological phases
Authors: Yang X M , Wu H C , Wang P , Jin L , Song Z 
Published: August 2020

Abstract
We develop a graphic approach for characterizing one-dimensional non-Hermitian topological phases. The eigenstates of energy bands are mapped to a graph on the torus, where a nontrivial topology exhibits as links. The topology of band touching exceptional points is a crucial aspect of a non-Hermitian system; the existence of exceptional point results in networks. We discuss the parity-time (




) symmetric two-band models. The pseudo-anti-Hermiticity protects the band topology, and the eigenstate graphs in the exact


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-symmetric phase locate on the torus surface under the

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symmetry protection. For the Su-Schrieffer-Heeger ladder, the eigenstate graph is a Hopf link in the gapped nontrivial phase; chiral-time symmetry protects that the movable exceptional points appear in pairs in the real-energy gapless phase, and each exceptional point splits into a pair of exceptional points when the


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symmetry breaks. The proposed graphic approach is applicable in one-dimensional N-band models. Our findings provide insight into one-dimensional non-Hermitian topology phases through visualizing the eigenstates.
Rolling bearing fault feature extraction using Adaptive Resonance-based Sparse Signal Decomposition
Authors: Wang Kaibo , Jiang Hongkai , Wu Zhenghong , Cao Jiping 
Published: August 2020

Abstract
The existence of periodic impacts in collected vibration signal is the representative symptom of rolling bearing localized defect. Due to the complicacy of the working condition, the fault-related impacts are usually submerged in other ingredients. This article proposes an adaptive Resonance-based Sparse Signal Decomposition (RSSD) for extracting the fault features of rolling bearings. Adaptive RSSD is constructed to fetch the impacts from collected vibration signal, by making RSSD decomposed signal kurtosis value maximum using Lion Swarm Algorithm (LSA). Multipoint Optimal Minimum Entropy Deconvolution Adjusted (MOMEDA) is further performed to enhance the amplitude and periodicity of impacts contained in RSSD decomposed signal, so that fault feature is highlighted. The superiority and availability of proposed strategy are validated by applying to single fault feature extraction of an experimental dataset and compound faults feature extraction of a locomotive rolling bearing.
Effect of Elevated Ambient Temperature on Simulator-Derived Oscillometric Blood Pressure Measurement
Authors: Ringrose Jennifer S , Kennedy Michael D , Kassam Jalisa , Mouhammed Omar , Sridar Sangita , Kenwell Zoltan , Padwal Raj 
Published: August 2020

Abstract

BACKGROUND
Oscillometric blood pressure (BP) devices are typically labeled for use up to 40 °C. Many geographic regions have ambient temperatures exceeding 40 °C. We assessed the effect of increased ambient temperature (40–55 °C) on simulator-derived oscillometric BP measurement.

METHODS
Three Omron BP769CAN devices, 3 A&D Medical UA-651BLE devices, and accompanying cuffs were used. A custom heat chamber heated each device to the specified temperature. A noninvasive BP simulator was used to take 3 measurements with each device at differing temperatures (22, 40, 45, 50, and 55 °C) and BP thresholds: 80/50, 100/60, 120/80, 140/90, 160/110, and 180/130 mm Hg. Using each device as its own control (22 °C), we determined the relative differences in mean BP for each device at each temperature and BP setting, assessed graphical trends with increasing temperature, and examined variability.

RESULTS
Graphical trends of mean simulator-subtracted BP differences from room temperature showed no discernable pattern, with differences clustered around zero. Overall mean difference in BP (combined elevated temperatures minus room temperature) was −0.8 ± 2.1 (systolic ± SD)/1.2 ± 3.5 (diastolic ± SD) mm Hg for the A&D device and 0.2 ± 0.4 (systolic ± SD)/−0.1 ± 0.1 (diastolic ± SD) mm Hg for the Omron. All individual elevated temperature differences (elevated temperature minus room temperature) except A&D diastolic BP at 50 °C were within 5 mm Hg.

CONCLUSIONS
In this simulator-based study assessing within-device differences, higher ambient temperatures resulted in oscillometric BP measurements that were comparable to those performed at room temperature.
Compete or commit: Preferences for early commitment process or ASHP Match among pharmacy residency program directors and residents
Authors: Cleverdon Kristin , Fisher Amber K , Mason Barbara , Nguyen Elaine 
Published: August 2020

Abstract

Purpose
To assess the recruitment preferences of directors of postgraduate year 2 (PGY2) pharmacy residency programs and postgraduate year 1 (PGY1) pharmacy residents seeking PGY2 residency positions, as well as key drivers of preference.

Methods
Two Web-based questionnaires were administered to residency program directors (RPDs) of PGY2 programs and PGY1 residents, respectively. Participants were recruited via email, and responses were collected from November 27 through December 14, 2018. RPDs and PGY1 residents were surveyed about their preferences regarding participation in the ASHP Resident Matching Program (ASHP Match) and participation in the early commitment process (ECP). Respondents were also asked to rank the importance of prespecified factors in decisions about whether to participate in either the Match or the ECP.

Results
The RPD questionnaire was completed by 295 participants in 43 states. The majority of RPDs (70.2%) stated that their PGY2 program generally preferred the ECP to the ASHP Match. Regardless of program preference, the most important driver of preference was the current PGY1 resident’s personality and fit. There were 243 completed resident questionnaires from 41 states. The majority of respondents (83.5%) indicated a preference to participate in the ECP vs the ASHP Match. Of those preferring the ECP, the highest-ranked consideration was the opportunity for further development at their PGY1 site.

Conclusion
Overall, the survey results indicated that both PGY2 programs and PGY1 residents interested in PGY2 training generally prefer the ECP to the ASHP Match. The survey results should be considered by stakeholders (students, residents, and RPDs) in deciding whether to participate in the Match or the ECP process.
Immediate Post-concussion and Cognitive Testing: Ceiling Effects, Reliability, and Implications for Interpretation
Authors: Gaudet Charles E , Konin Jeff , Faust David 
Published: August 2020

Abstract

Objective
The most commonly used computerized neurocognitive test in concussion assessment and management, Immediate Post-concussion and Cognitive Testing (ImPACT), has demonstrated varying and sometimes concerning levels of test–retest reliability. This study aimed to further examine ImPACT’s psychometric qualities and whether ceiling effects may suppress its reliability.

Method
A total of 300 consecutively selected ImPACT score reports for students attending a secondary school between 2010 and 2015 were reviewed. Test–retest reliabilities for composite scores and subscales were computed using Pearson product moment correlations (r) and intraclass correlation coefficients. To examine the potential influence of ceiling effects, we conducted frequency analyses of scores falling at, or near, the maximum possible score.

Results
A total of 92 score reports met inclusion criteria. Test–retest reliabilities ranged from 0.42 to 0.69 for composite scores and 0.19 to 0.71 for subscales. Subscales comprising the Verbal and Visual Memory composites evidenced the most prominent ceiling effects.

Conclusions
Obtained test–retest reliabilities were consistent with a large segment of the literature and add to concerns about ImPACT’s reliability. Furthermore, at least in a select sample, this study identified sizeable ceiling effects that likely diminish the reliability of some composite scores. To mitigate the risk of false-negative errors on post-injury testing, ImPACT users should be cognizant of such ceiling effects. Supplemental, or alternative, approaches to protect against underestimating baseline functioning also warrant consideration.
Topoly: Python package to analyze topology of polymers
Authors: Dabrowski-Tumanski Pawel , Rubach Pawel , Niemyska Wanda , Gren Bartosz Ambrozy , Sulkowska Joanna Ida 
Published: August 2020

AbstractThe increasing role of topology in (bio)physical properties of matter creates a need for an efficient method of detecting the topology of a (bio)polymer. However, the existing tools allow one to classify only the simplest knots and cannot be used in automated sample analysis. To answer this need, we created the Topoly Python package. This package enables the distinguishing of knots, slipknots, links and spatial graphs through the calculation of different topological polynomial invariants. It also enables one to create the minimal spanning surface on a given loop, e.g. to detect a lasso motif or to generate random closed polymers. It is capable of reading various file formats, including PDB. The extensive documentation along with test cases and the simplicity of the Python programming language make it a very simple to use yet powerful tool, suitable even for inexperienced users. Topoly can be obtained from https://topoly.cent.uw.edu.pl.
Structure of the reproductive system of the sexual generation of the endemic Arctic species Acyrthosiphon svalbardicum and its temperate counterpart Acyrthosiphon pisum (Hemiptera, Aphididae)
Authors: Wieczorek Karina , Chłond Dominik , Junkiert Łukasz , Świątek Piotr 
Published: August 2020

Abstract
The Arctic aphids live briefly and must breed quickly to survive. Shortened life cycle, with only two generations: the stem mother and sexuales—oviparous females and males is an adaptation for optimal use of the short breeding period, which lasts from late July to the end of August. Using Acyrthosiphon svalbardicum, an endemic High Arctic aphid species, we describe the structure of the reproductive system of sexual morphs and compare with its temperate counterparts, in particular the model organism the pea aphid Acyrthosiphon pisum. Generally, the histological composition and ultrastructure of reproductive system of sexuales of A. svalbardicum is broadly similar to the reproductive systems described already in other species of aphids. The unique characters include in both oviparous females and males an enormous layer of the fat body, adhering to the structures of the internal reproductive system. The greatly enlarged accessory glands of males accumulate a heterogenous secretion composed of irregularly organized bunches of spicule-like structures of high electron density embedded in fine and coarse granular material. This material, unknown among temperate counterparts of A. svalbardicum, during mating is transported from the accessory glands of the male to its ejaculatory duct, where it is mixed with the ejaculate, and then is transferred to the spermatheca of the oviparous female.
Transcriptomic response to elevated water temperatures in adult migrating Yukon River Chinook salmon (Oncorhynchus tshawytscha)
Authors: Bowen Lizabeth , von Biela Vanessa R , McCormick Stephen D , Regish Amy M , Waters Shannon C , Durbin-Johnson Blythe , Britton Monica , Settles Matthew L , Donnelly Daniel S , Laske Sarah M , Carey Michael P , Brown Randy J , Zimmerman Christian E 
Published: August 2020

ABSTRACTChinook salmon (Oncorhynchus tshawytscha) declines are widespread and may be attributed, at least in part, to warming river temperatures. Water temperatures in the Yukon River and tributaries often exceed 18°C, a threshold commonly associated with heat stress and elevated mortality in Pacific salmon. Untangling the complex web of direct and indirect physiological effects of heat stress on salmon is difficult in a natural setting with innumerable system challenges but is necessary to increase our understanding of both lethal and sublethal impacts of heat stress on populations. The goal of this study was to characterize the cellular stress response in multiple Chinook salmon tissues after acute elevated temperature challenges. We conducted a controlled 4-hour temperature exposure (control, 18°C and 21°C) experiment on the bank of the Yukon River followed by gene expression (GE) profiling using a 3′-Tag-RNA-Seq protocol. The full transcriptome was analysed for 22 Chinook salmon in muscle, gill and liver tissue. Both the 21°C and 18°C treatments induced greater activity in genes associated with protein folding (e.g. HSP70, HSP90 mRNA) processes in all tissues. Global GE patterns indicate that transcriptomic responses to heat stress were highly tissue-specific, underscoring the importance of analyzing multiple tissues for determination of physiological effect. Primary superclusters (i.e. groupings of loosely related terms) of altered biological processes were identified in each tissue type, including regulation of DNA damage response (gill), regulation by host of viral transcription (liver) and regulation of the force of heart contraction (muscle) in the 21°C treatment. This study provides insight into mechanisms potentially affecting adult Chinook salmon as they encounter warm water during their spawning migration in the Yukon River and suggests that both basic and more specialized cellular functions may be disrupted.
Case report: third-degree atrioventricular block secondary to septic coronary artery embolism following infective endocarditis
Authors: Prashar Abhisheik , Chen Daniel , Youssef George , Ramsay David 
Published: August 2020

Abstract

Background
Coronary artery emboli can occur from a number of rare causes such as arterial thrombo-embolus or septic embolus. This diagnosis generally requires multi-modal imaging including echocardiography, computed tomography, or invasive coronary angiography. Septic coronary emboli is an extremely rare consequence of infective endocarditis (IE), having been reported in &lt;1% of all cases.

Case summary
A 54-year-old previously healthy Tibetan monk presented feeling generally unwell and lethargic. Electrocardiogram demonstrated sinus rhythm, third-degree atrioventricular block with a left bundle branch escape. Initial transthoracic and transoesophageal echocardiography demonstrated vegetations on the aortic and tricuspid valve as well as intra-myocardial abscess. Coronary angiography revealed septic embolus involving the septal perforator coronary artery. He underwent surgical replacement of the infected valves and debridement and repair of a ventricular septal defect.

Discussion
Infective endocarditis can predispose to a range of cardiac pathology. This case demonstrates that patients can present with cardiac conduction disease from a septic embolus involving a coronary artery as a complication of IE.
The Effect of Fertility on Mothers’ Labor Supply over the Last Two Centuries
Authors: Aaronson Daniel , Dehejia Rajeev , Jordan Andrew , Pop-Eleches Cristian , Samii Cyrus , Schulze Karl 
Published: August 2020

AbstractUsing a compiled data set of 441 censuses and surveys from between 1787 and 2015, representing 103 countries and 51.4 million mothers, we find that: (i) the effect of fertility on labour supply is typically indistinguishable from zero at low levels of development and large and negative at higher levels of development, (ii) the negative gradient is stable across historical and contemporary data, and (iii) the results are robust to identification strategies, model specification, and data construction and scaling. Our results are consistent with changes in the sectoral and occupational structure of female jobs and a standard labour–leisure model.