bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation and prediction of open source software evolution using automated parameter mining for agent-based simulation
Authors: Honsel Daniel , Herbold Verena , Waack Stephan , Grabowski Jens 
Published: May 2021

AbstractTo guide software development, the estimation of the impact of decision making on the development process can be helpful in planning. For this estimation, often prediction models are used which can be learned from project data. In this paper, an approach for the usage of agent-based simulation for the prediction of software evolution trends is presented. The specialty of the proposed approach lies in the automated parameter estimation for the instantiation of project-specific simulation models. We want to assess how well a baseline model using average (commit) behavior of the agents (i.e., the developers) performs compared to models where different amount of project-specific data is fed into the simulation model. The approach involves the interplay between the mining framework and simulation framework. Parameters to be estimated include, e.g., file change probabilities of developers and the team constellation reflecting different developer roles. The structural evolution of software projects is observed using change coupling graphs based on common file changes. For the validation of simulation results, we compare empirical with simulated results. Our results showed that an average simulation model can mimic general project growth trends like the number of commits and files well and thus, can help project managers in, e.g., controlling the onboarding of developers. Besides, the simulated co-change evolution could be improved significantly using project-specific data.
The influence of crystalline structure of cellulose in chitosan-based biocomposites on removal of Ca(II), Mg(II), Fe(III) ion in aqueous solutions
Authors: Grząbka-Zasadzińska Aleksandra , Ratajczak Izabela , Król Katarzyna , Woźniak Magdalena , Borysiak Sławomir 
Published: May 2021

AbstractIn this work, the influence of the supermolecular structure of cellulosic fillers in chitosan matrix on the process of adsorption of calcium, magnesium and iron metal ion was analyzed, while using techniques such as: X-ray diffraction, flame atomic absorption spectrometry, FTIR spectroscopy, particle size analysis, and wettability angle. It has been shown that polymorphic form of cellulose significantly affects its particle size. The introduction of cellulosic filler into polymer matrix was responsible for changes in the sorption efficiency of chitosan composites. It was found that materials with nanocellulose II were characterized with the highest efficiency of adsorption. This interesting relationship has not been reported in the literature, yet. It is important especially in terms of designing composite materials with high adsorption capacity. In the presented paper this issue was discussed, taking into account crystallographic aspects as well as changes in the hydrophilicity of the surface of composite materials. Composite materials were also subjected to mechanical tests which showed some interesting increase in tensile strength when compared to the unfilled polymer.
Towards an enhanced indication of provisioning ecosystem services in agro-ecosystems
Authors: Bethwell Claudia , Burkhard Benjamin , Daedlow Katrin , Sattler Claudia , Reckling Moritz , Zander Peter 
Published: May 2021

AbstractProvisioning ecosystem services play a vital role in sustaining human well-being. Agro-ecosystems contribute a significant share of these services, besides food and fodder and also fuel and fibre as well as regulating and cultural ecosystem services. Until now, the indication of provisioning ecosystem services of agro-ecosystems has been based almost only on yield numbers of agricultural products. Such an indication is problematic due to several reasons which include a disregard of the role of significant anthropogenic contributions to ecosystem service co-generation, external environmental effects and strong dependence on site conditions. We argue for an enhanced indication of provisioning ecosystem services that considers multiple aspects of their delivery. The conceptual base for such an indication has been made by prior publications which have been reviewed. Relevant points were taken up in this article and condensed into a conceptual model in order to develop a more holistic and expanded set of indictors, which was then exemplarily applied and tested in three case studies in Germany. The case studies represent different natural conditions, and the indicator set application showed that ecosystem services (ES) flow—in terms of output alone—does not characterise agro-ecosystems sufficiently. The proposed aspects of provisioning ecosystem services can give a fuller picture, for example, by input-output relationships, as it is possible by just using single indicators. Uncertainties as well as pros and cons of such an approach are elaborated. Finally, recommendations for an enhanced indication of provisioning ecosystem services in agro-ecosystems that can help to integrate agricultural principles with ideas of sustainability and site-specific land use are derived.
Shaping a Smart Transportation System for Sustainable Value Co-Creation
Authors: Zhang Jun , Li Shuyang , Wang Yichuan 
Published: May 2021

AbstractThe smart transportation system (STS) leverages ubiquitous and networked computing to improve the efficiency of urban mobility. Whilst existing IS work has explored various factors influencing STS development, there is a lack of consideration of how value can be created for building a more sustainable STS. Drawing upon the value co-creation theory and stakeholder theory, we seek to understand the socio-technical shaping of the STS ecosystem and how government, firms and citizens collaboratively create sustainable value for designing and implementing STS initiatives. To reach this aim, we carry out a longitudinal case study over 2016–2018 in Shijiazhuang, China. We offer both theoretical and practical explanations on (i) key value facets with regard to sustainable STS design and implementation; and (ii) a holistic view of iterative value co-creation process pushed by key stakeholders. This study makes particular contributions to the IS, marketing and transportation literature by offering a critical understanding of the social dynamics for shaping a big data-driven STS ecosystem.
Three-Dimensional Membrane Imaging with X-ray Ptychography: Determination of Membrane Transport Properties for Membrane Distillation
Authors: Cramer Kerstin , Prasianakis Nikolaos I. , Niceno Bojan , Ihli Johannes , Holler Mirko , Leyer Stephan 
Published: May 2021

AbstractMembrane distillation (MD) is a desalination technique that uses a membrane to thermally separate potable water from sea or brackish water. The mass transport processes through the membrane are commonly described by the dusty gas model. These processes are modeled assuming uniform, ideally cylindrical capillaries and are adjusted for the membrane geometry by including porosity and tortuosity. The tortuosity is usually set to 2 or is used as an adjusting parameter to fit theoretical models to experimentally measured data. In this work, ptychographic X-ray computed tomography is employed to map the three-dimensional (3D) structure of three commercial state-of-the-art PTFE membranes in MD. The porosity, tortuosity and permeability (viscous flow coefficient) of the samples are computed using the lattice Boltzmann method. The intrinsic permeability is compared to the dusty gas model and an apparent permeability is proposed which is corrected for Knudsen slip effects at the membrane structure.Article Highlights3D structure of membranes for distillation measured at full height at an unprecedented detail using X-ray ptychography for the first time.Comparison of the dusty gas model to 3D direct numerical simulation: permeability and Knudsen effects.Membrane characterization and calculation of the hydraulic tortuosity factor from 3D flow field simulations.
Effective suppression of mode distortion induced by stimulated Raman scattering in high-power fiber amplifiers
Authors: Gao Wei , Fan Wenhui , Ju Pei , Li Gang , Zhang Yanpeng , He Aifeng , Gao Qi , Li Zhe 
Published: May 2021

Abstract
Mode distortion induced by stimulated Raman scattering (SRS) has become a new obstacle for the further development of high-power fiber lasers with high beam quality. Here, an approach for effective suppression of the SRS-induced mode distortion in high-power fiber amplifiers has been demonstrated experimentally by adjusting the seed power (output power of seed source) and forward feedback coefficient of the rear port in the seed source. It is shown that the threshold power of the SRS-induced mode distortion can be increased significantly by reducing the seed power or the forward feedback coefficient. Moreover, it has also been found that the threshold power is extremely sensitive to the forward feedback power value from the rear port. The influence of the seed power on the threshold power can be attributed to the fact that the seed power plays an important role in the effective length of the gain fiber in the amplifier. The influence of the forward feedback coefficient on the threshold power can be attributed to the enhanced SRS configuration because the end surface of the rear port together with the fiber in the amplifier constitutes a half-opening cavity. This suppression approach will be very helpful to further develop the high-power fiber amplifiers with high beam quality.
Surgeons’ mental models of surgical site infection: Insights into adherence with complex prevention bundles
Authors: Pop-Vicas Aurora E. , Young Amanda , Knobloch Mary-Jo , Heise Charles , Bowers Barbara , Safdar Nasia 
Published: May 2021

AbstractOf 10 surgeons interviewed in a descriptive qualitative study, 6 believed that surgical site infections are inevitable. Bundle adherence was felt to be more likely with strong evidence-based measures developed by surgical leaders. The intrinsic desire to excel was viewed as the main adherence motivator, rather than “pay-for-performance” models.
Physics of unsteady cylinder-induced shock-wave/transitional boundary-layer interactions
Authors: Murphree Zachary R. , Combs Christopher S. , Yu Wesley M. , Dolling David S. , Clemens Noel T. 
Published: May 2021

Given the current lack of experimental data for shock waves interacting with incoming transitional boundary layers, the goal of this study was to characterize the dynamics of such an interaction to better understand the fundamental fluid physics of these complex phenomena. Here, the mean flow field and time-dependent characteristics of a three-dimensional Mach 5 cylinder-induced shock-wave/boundary-layer interaction where the upstream boundary layer is transitional, have been studied experimentally. The interactions were generated with a right circular cylinder mounted on a flat plate. Streamwise–spanwise planar laser scattering from a condensed alcohol fog and schlieren imaging were used to characterize the mean and instantaneous structure of the interaction, and fast-response wall-pressure measurements on the centreline upstream of the cylinder enabled characterization of the unsteadiness. The pressure measurements show a mean pressure profile that resembles a composite of an upstream laminar profile and a downstream turbulent profile. The upstream influence location of the transitional interaction was approximately 8.5 diameters (

$d$

) upstream of the cylinder leading edge, which is between that of a laminar and a turbulent interaction, and is followed by a plateau region to approximately

$4d$

upstream of the cylinder. The plateau region is a region with a thicker boundary layer and possible flow separation. The plateau pressure was within 7 % of the value predicted by Hill's correlation for free-interaction phenomena. Furthermore, a statistical analysis of the pressure histories suggests that the entire interaction stretches and contracts in concert. Power spectral densities of the pressure fluctuations showed unsteadiness throughout the interaction with energy content primarily centred between a region defined by a separation-length-based Strouhal number

$St_{L} = 0.05\text {--}0.2$

, comparing well with other related studies of cylinder-induced interactions. Cross-correlations and coherence functions in the interaction suggest that the unsteadiness in the laminar region may be due to the entire ‘laminar’ region oscillating in response to the ‘turbulent’ unsteadiness of the intermittent region.
Feminism as Epic Theory
Authors: Phelan Kate M. 
Published: May 2021

AbstractSheldon Wolin identifies a particular tradition within political theory that he calls ‘epic theory’. Epic theory, he explains, is political theory's equivalent of the Kuhnian scientific revolution. This article takes up the analogy between epic theory and scientific revolution to show that feminism is an epic theory in the truest sense of the term, a sense not fully grasped by Wolin. It is so for two reasons. First, it is a theory of the whole. Second, it is less a discovery than an invention of the world. The author seeks to account for the existence of feminism in the face of its impossibility, and to demonstrate the magnitude of the achievement that feminism represents.
Efficacy of topical application of autologous platelet-rich plasma in adult tonsillectomy patients: a randomised control study
Authors: Nanditha S , Gopalakrishnan S , Karthikeyan P , Singh Bakshi S 
Published: May 2021

AbstractObjectiveTonsillectomy is a painful surgery performed in cases of recurrent tonsillitis. Application of platelet-rich plasma to diminish the pain and morbidity post-tonsillectomy is gaining importance. This study evaluated post-operative pain and morbidity after autologous platelet-rich plasma application on the tonsil beds during tonsillectomy.MethodParticipants were randomised into group 1 (n = 28, peri-operative platelet-rich plasma intervention) and group 2 (n = 28, control). Post-tonsillectomy, patients were assessed (day 0, 1, 2, 3, 7 and 14) for pain, healing and time taken to return to normal activity. Data were analysed by independent t-test and chi-square test with p ≤ 0.05 as the significance level.ResultsA significant decrease in the mean pain score up to day 7 (p < 0.05) and tonsillar fossae healing on days 2 and 3 (p < 0.05) post-tonsillectomy was noted. The majority of the patients returned to their routine activities after a week post-tonsillectomy.ConclusionPlatelet-rich plasma application was effective in accentuating healing and reducing post-tonsillectomy pain and morbidity.
Functional connexin35 increased in the myopic chicken retina
Authors: Banerjee Seema , Wang Qing , Tang George , So ChungHim , Shan Sze Wan , Li King Kit , Do Chi-Wai , Pan Feng 
Published: May 2021

Abstract
Our previous research showed that increased phosphorylation of connexin (Cx)36 indicated extended coupling of AII amacrine cells (ACs) in the rod-dominant mouse myopic retina. This research will determine whether phosphorylation at serine 276 of Cx35-containing gap junctions increased in the myopic chicken, whose retina is cone-dominant. Refractive errors and ocular biometric dimensions of 7-days-old chickens were determined following 12 h and 7 days induction of myopia by a −10D lens. The expression pattern and size of Cx35-positive plaques were examined in the early (12 h) and compensated stages (7 days) of lens-induced myopia (LIM). At the same time, phosphorylation at serine 276 (functional assay) of Cx35 in strata 5 (S5) of the inner plexiform layer was investigated. The axial length of the 7 days LIM eyes was significantly longer than that of non-LIM controls (P < 0.05). Anti-phospho-Ser276 (Ser276-P)-labeled plaques were significantly increased in LIM retinas at both 12 h and 7 days. The density of Ser276-P of Cx35 was observed to increase after 12 h LIM. In the meanwhile, the areas of existing Cx35 plaques did not change. As there was more phosphorylation of connexin35 at Ser276 at both the early and late stages (12 h) and 7 days of LIM chicken retinal activity, the coupling with ACs could be increased in myopia development of the cone-dominated chicken retina.
Interference of fixatives and fixation period on the morphologic analysis of ovarian preantral follicles
Authors: Brito D.C.C. , Ñaupas L.V.S. , Souza S.S. , Alcântara G.L.H. , Figueiredo J.R. , Santos R.R. , Rodrigues A.P.R. 
Published: May 2021

SummaryOvine ovarian fragments (3 × 3 × 1 mm) were fixed in neutral buffered formalin (NBF), Carnoy’s solution (CAR), Davidson’s solution (DAV), or paraformaldehyde (PFA) for 12 h or 24 h. After this fixation time, each fragment was prepared for histological analysis. Although fixative and fixation period did not affect follicular and stromal cells density, the percentages of morphologically normal primordial and primary follicles was affected by the fixative type and period of fixation. Paraformaldehyde was not indicated as a fixative for ovarian fragments. Formalin was a suitable fixative only when the period of fixation was 12 h, while Carnoy was efficient after a fixation period of 24 h. In conclusion, the most indicated fixative for the morphological evaluation of ovarian preantral follicles was DAV, regardless of the fixation period, that is 12 or 24 h.
Chest tube drainage placement may not be a necessity in paediatric thoracoscopic surgery: a retrospective study
Authors: Zhang Gang , Liu Dandan , Kuang Ruiming , Cai Chun , Li Xiao , Yu Gang , Fan Xiujing 
Published: May 2021

AbstractObjective:Chest tube drainage placement, a standard procedure in video-assisted thoracoscopic surgery, was reported to cause perioperative complications like pain and increased risk of infection. The present study was designed to evaluate the necessity of chest tube drainage inpaediatric thoracoscopic surgery.Methods:Thirty children admitted to our hospital from April 2018 to April 2020 were included in the current study and were grouped as the tube group (children receiving video-assisted thoracoscopic surgery with chest tube drainage) and the non-tube group (children receiving video-assisted thoracoscopic surgery without chest tube drainage). Laboratory hemogram index, length of hospitalisation, post-operative performance of involved children, and psychological acceptance of indicated therapy by guardians of the involved children were investigated.Results:Laboratory examination revealed that the mean corpuscular haemoglobin concentration in the non-tube group was significantly higher than that in the tube group on post-operative day 1 (p < 0.05). Children in the non-tube group had a shorter length of hospitalisation (7–9 days) than that of patients from the tube group. Additionally, the frequency of crying of children was decreased and psychological acceptance by patients’ guardians was improved in the non-tube group when compared with the tube group.Conclusion:This study showed that chest tube drainage placement may not be necessary in several cases of paediatric video-assisted thoracoscopic surgery. Rapid recovery with decreased perioperative complications in children operated by video-assisted thoracoscopic surgery without tube placement could also reduce the burden of the family and society both economically and psychologically.
Leveling the Field: Gender Inequity in Academia During COVID-19
Authors: Shalaby Marwa , Allam Nermin , Buttorff Gail J. 
Published: May 2021

ABSTRACTThis article explores the differential impact of the COVID-19 pandemic on the productivity of male and female academics and whether the ongoing health crisis will exacerbate further the existing gender gap in academia in both the short and long terms. We present early evidence of the pandemic’s disproportionate effect on women’s research productivity using online survey data supplemented by interview data with regional and international female political scientists. The interviews and survey findings reveal gender disparities in perceived research productivity and service workloads during the pandemic. The results also shed initial light on the pandemic’s impact on the research productivity of academics who are parents, especially among women.
Who Says Yes or No? Models of Ethical and Safety Oversight for Student-Led Political Violence Research
Authors: Eck Kristine , Cohen Dara Kay 
Published: May 2021

ABSTRACTThe ethical risks inherent in student research on political violence that involve human participants are myriad. Undergraduate and master’s students face constraints that are different than those for many doctoral students and faculty researchers, and it is the responsibility of educators and academic institutions to ensure that students engage in ethical practices and to mitigate risks. This article focuses on formal mechanisms of oversight. Drawing on discussions with colleagues across the globe, we describe how institutions can design oversight mechanisms to manage student research. We present five distinct models for how ethical oversight of student research is provided in academic programs around the world, considering the costs and benefits of each model. The article concludes that whereas the creation of oversight systems can seem daunting, it is useful to start small—indeed, moving from no oversight to some oversight is a significant improvement. Programs and academic units then can build on these early efforts, experiment with other systems, and eventually develop a system that is adapted to an institution through iterative improvements based on student and faculty experiences.
Ritual and ritual text in the Zoroastrian tradition: The extent of Yasna 41
Authors: ZEINI ARASH 
Published: May 2021

AbstractThis article examines the extent of the concluding section (Y 41) of the Yasna Haptaŋhāiti in light of the manuscript evidence and the section's divergent reception in a Middle Persian text known as the “Supplementary Texts to the Šāyest nē Šāyest” (Suppl.ŠnŠ). This investigation will entertain the possibility of an alternative ritual being described in the Suppl.ŠnŠ. Moreover, it argues that the manuscripts transmit the ritual text along with certain variations and repetitions while the descriptions of the extent of each section preserve the necessary boundaries of the text as a textual composition or unit.
Using vignettes to improve understanding of Social Security and annuities
Authors: Samek Anya , Kapteyn Arie , Gray Andre 
Published: May 2021

AbstractEvidence shows that people have difficulty understanding complex aspects of retirement planning, which leads them to under-utilize annuities and claim Social Security benefits earlier than is optimal. To target this problem, we developed vignettes about the consequences of different annuitization and claiming decisions. We evaluated our vignettes using an experiment with a representative online panel of nearly 2,000 Americans. In our experiment, respondents were either assigned to a control group with no vignette, to a written vignette, or to a video vignette. They were then asked to give advice to hypothetical persons on annuitization or Social Security claiming, and were asked factual questions about these concepts. We found evidence that being exposed to vignettes led respondents to give better advice. For example, the gap between advised claim age for a relatively healthy person versus a relatively sick person was larger by nearly a year in the vignette treatments than in the control group. Furthermore, the vignettes increased financial literacy related to these concepts by 10–15 percentage points. Interestingly, the mode of communication did not have a significant impact – the video and written vignettes were equally effective.