bluuebunny/crossref_metadata_2025_split huggingface dataset:
Insight into the significance of ramped wall temperature and ramped surface concentration: The case of Casson fluid flow on an inclined Riga plate with heat absorption and chemical reaction
Authors: Asogwa Kanayo K. , Bilal Sardar M. , Animasaun Isaac L. , Mebarek-Oudina Fateh M. 
Published: October 2021

Abstract
The importance of heat absorption and chemical reactions and their impact in engineering is increasingly appreciated. However, little is known about the effect of chemical reaction and heat absorption of ramped wall temperature and ramped surface concentration on a Casson fluid flow over a rapidly accelerated inclined Riga plate. The aim of the study, among other findings along an inclined Riga plate, is to address the impact of heat sink and chemical reaction over a ramped temperature and ramped surface concentration. By introducing relevant similarity variables, the dimensional governing equations are non-dimensionalized and parameterized. After that, the derived parameterized governing equations are solved analytically using the Laplace transform method. Graphs are used to discuss and analyse the effects of various physical parameters on momentum, energy, and concentration. The latest findings are verified by comparing them to previous results. Tables are also used to determine skin friction, Nusselt number, and Sherwood number expressions. Comparatively, it's worth noting that chemical reaction, Casson, and heat absorption parameters tend to escalate Skin friction for both ramped temperature and ramped surface concentration. Moreso, an increase in the chemical reaction and heat absorption parameters induces a decrease in the momentum distribution.
The effect of process design on refiner pulp quality control performance
Authors: Sund Johan , Sandberg Christer , Karlström Anders , Thungström Göran , Engstrand Per 
Published: October 2021

Abstract
In this study, the effect of process- and online analyser configuration on pulp quality control is explored. The following parameters were included: analyser sampling interval, time delay, measurement error magnitude, and latency chest residence time. Using different values of parameters in a process model, a range of configurations were constructed. For each configuration, the achievable control performance was evaluated using an optimization approach. PI controller settings were chosen based on minimization of the integrated absolute error (IAE) in pulp quality after an input step disturbance. The results show that reducing the sampling interval improves performance also when the interval is smaller than the chest residence time or the analyser delay. Moreover, reducing the chest residence time can reduce the IAE by up to 40 %. However, reducing the residence time to lower than 1/3 of the sampling interval does not improve performance. Further improvement is possible if the analyser delay is reduced. The compromise between reducing the IAE and avoiding creating variation by acting on measurement error has a strong influence on the results. In conclusion, pulp quality control performance can be improved significantly by making changes to the studied configuration parameters.
Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
Authors: He Wei , Liao Gang 
Published: October 2021

Abstract
Nano calcium silicate hydrate (nano-C–S–H) has become a novel additive for advanced cement-based materials. In this paper, the effect of nano-C–S–H on the early-age performance of cement paste has been studied, and some micro-characterization methods were used to measure the microstructure of nano-C–S–H-modified cement-based material. The results showed that the initial fluidity of cement paste was improved after addition of nano-C–S–H, but the fluidity gradual loss increased with the dosage of nano-C–S–H. The autogenous shrinkage of cement paste can be reduced by up to 42% maximum at an appropriate addition of nano-C–S–H. The mechanical property of cement paste was enhanced noticeably after adding nano-C–S–H, namely, the compressive strengths were improved by 52% and 47.74% at age of 1 day and 7 days, respectively. More hydration products were observed and pore diameter of cement matrix was refined after adding nano-C–S–H, indicating that the early hydration process of cement was accelerated by nano-C–S–H. This was mainly attributed to seed effect of nano-C–S–H. The detailed relationship between microstructure and early-age performance was also discussed.
Kurt Daluege, die Stennes-Revolten 1930/31 und der Aufstieg der SS
Authors: Steger Sascha 
Published: October 2021

Abstract
In den Jahren 1930 und 1931 erschütterten zwei Revolten des SA-Führers Walter Stennes die im Dauerwahlkampf stehende NS-Bewegung. Die schnelle Niederschlagung beider Parteikrisen reklamierte die ostdeutsche Schutzstaffel unter Kurt Daluege für sich und verbreitete die Erzählung, Hitler habe die aufstrebende SS mit dem Leitspruch „Meine Ehre heißt Treue“ ausgezeichnet, um ihr für den aufopferungsvollen Einsatz gegen die Rebellen zu danken. Sascha Steger stellt dieses bis heute wirkmächtige Narrativ auf den Prüfstand, analysiert den tatsächlichen Verlauf der Stennes-Revolten und kommt zu dem Ergebnis, dass die SS unter Daluege zwar treu zum „Führer“ stand, aber keine entscheidende Rolle bei der Beendigung der Auseinandersetzung spielte.
Geschlecht und Demokratie
Authors: Heinemann Isabel , Steber Martina 
Published: October 2021

Abstract
Deutungskämpfe um die Ordnung der Geschlechter prägten die Geschichte der bundesrepublikanischen Demokratie. Vorstellungen von einer je nach Standpunkt natürlichen oder gerechten Geschlechterordnung gingen in das Grundgesetz ein, sie formten die politische Praxis demokratischer Institutionen und sie strukturierten alltägliche Aneignungen demokratischer Prinzipien. Gleichzeitig waren diese Vorstellungen von Beginn an umstritten. Die Autorinnen und Autoren untersuchen aus sechs verschiedenen Perspektiven, wie die Produktion von Geschlecht als sozialer Kategorie mit der Hervorbringung und Praxis von Demokratie in den ersten Jahrzehnten der Bundesrepublik verschränkt war. Mit Blick auf Geschlechterordnungen treten die inneren Widersprüche des westdeutschen Demokratieprojekts klar hervor.
Evaluation of the Properties of Cement Mortar Used in Prefabricated Road Base as Caulking Material
Authors: Yongchun Cheng , Haitao Wang , Yuwei Zhang , Liding Li , Yunshuo Bai , Xun Sun , Zhishu Xu , Jiaxiang Liang 
Published: October 2021

Abstract
For economical and convenient construction of road pavement, the prefabricated road base is used in pavement engineering as a new construction technique. The same as the other prefabricated structure, the joints of prefabricated road base blocks need a caulking material to fulfill and connect, and cement mortar is selected because of its superb properties in mechanics and workability. Aimed to evaluate the cement mortar with different additives, such as redispersion emulsoid powder and defoamer to meet the needs of prefabricated road base, three experimental groups of cement mortar are compared with the control group through mechanical properties tests, durability tests, and fatigue tests in this paper. By analyzing the results of these laboratory experimental tests, it can be found that the addition of redispersion emulsoid powder in the cement mortar can improve the deformability and the ability of frost resistance, and the addition of defoamer can improve the mechanical properties but decrease the frost resistance. And the cement mortar with redispersion emulsoid powder and defoamer obtains an excellent fatigue performance.
Pure Nash Equilibria in Resource Graph Games
Authors: Harks Tobias , Klimm Max , Matuschke Jannik 
Published: October 2021

This paper studies the existence of pure Nash equilibria in resource graph games, a general class of strategic games succinctly representing the players’ private costs. These games are defined relative to a finite set of resources and the strategy set of each player corresponds to a set of subsets of resources. The cost of a resource is an arbitrary function of the load vector of a certain subset of resources. As our main result, we give complete characterizations of the cost functions guaranteeing the existence of pure Nash equilibria for weighted and unweighted players, respectively.
For unweighted players, pure Nash equilibria are guaranteed to exist for any choice of the players’ strategy space if and only if the cost of each resource is an arbitrary function of the load of the resource itself and linear in the load of all other resources where the linear coefficients of mutual influence of different resources are symmetric. This implies in particular that for any other cost structure there is a resource graph game that does not have a pure Nash equilibrium.
For weighted games where players have intrinsic weights and the cost of each resource depends on the aggregated weight of its users, pure Nash equilibria are guaranteed to exist if and only if the cost of a resource is linear in all resource loads, and the linear factors of mutual influence are symmetric, or there is no interaction among resources and the cost is an exponential function of the local resource load.
We further discuss the computational complexity of pure Nash equilibria in resource graph games showing that for unweighted games where pure Nash equilibria are guaranteed to exist, it is coNP-complete to decide for a given strategy profile whether it is a pure Nash equilibrium. For general resource graph games, we prove that the decision whether a pure Nash equilibrium exists is Σ p 2 -complete.
Modelos Mentales en los jóvenes transeúntes de la plaza de Bolívar de Bogotá con respecto a lo que es la viruela y de qué manera lo relacionan con las palomas del sector
Authors: Varón Rodríguez María José , Rodríguez Torres Nevis Zharick , Torres Niño Aura Lucia , Olave Angulo Camila , Orjuela Ibáñez Adrián Felipe 
Published: October 2021

Este artículo trata sobre la indagación de los modelos mentales que tienen los transeúntes (de entre los 15 y 25 años) de la Plaza de Bolívar de Bogotá, sobre la concepción de la enfermedad de la viruela y su proceso infeccioso dentro del cuerpo, para relacionar esta con la infección viral de la viruela aviar y las percepciones de la misma; teniendo en cuenta la importancia de la situación actual de pandemia por la COVID 19 y además la relevancia de la construcción de conocimiento frente a un complejo tan relevante como lo son los virus en consecuencia con el riesgo que representan para los seres vivos. Para esto se realizó un cuestionario, que incluye dibujos y una entrevista final. El presente trabajo se realizó con una postura artefactual desde una mirada hermenéutica-interpretativa, tanto los materiales como los resultados obtenidos se observan desde la óptica de la Teoría de los Modelos Mentales de Johnson Laird, referente principal para de analizar los diferentes modelos mentales que se generaron en los participantes de este proyecto, obteniendo como resultados cuatro modelos generales, a raíz el cuestionario usado, Modelo: Racional simple, Espacial, Temporal y Cinemático, estos establecidos por las subcategorías que se realizaron previamente con los datos recolectados. Además de tres modelos generales a partir de la entrevista: Monádico, Relacional y Metalingüístico; logrando de esta manera analizar los modelos mentales desde un carácter hermenéutico-interpretativo, sobre la enfermedad de la viruela y su proceso infeccioso dentro del cuerpo.
Spatial variability of the horizontal structure and production of biomass in Massai grass in an agropastoral system
Authors: Batista Carlos Henrique , Silveira Júnior Otacílio , Lima Ítalo Cordeiro Silva , Cardoso José Alberto Ferreira , Cruz Rossini Sôffa da , Santos Antonio Clementino dos 
Published: October 2021

In Brazil, 60% to 80% of cultivated pastures show some degradation level. Thus, the objective was to evaluate the variability of the horizontal structure and biomass of Massai grass in an agropastoral system as a diagnosis of degraded pasture. We performed the georeferencing in a 12m × 13m mesh, totaling 48 sampling stations, and evaluated grass's biomass and structural characteristics at each station. We submitted the data to descriptive statistics and geostatistical analysis. We observed a process of degradation of pasture in the experimental area. Under these conditions, most of the characteristics of the pasture's horizontal structure and the production of biomass showed spatial dependence with high variability. Geostatistics efficiently represented and understood the variability of the studied attributes, enabling developing a specific pasture recovery management plan.
Stakeholders Influence on the Closing Phase of Projects
Authors: Caibula Milis Nilgun , Militaru Constantin 
Published: October 2021

The current context of the economic-social environment determines a multidimensional approach to performance in project management, taking into account the particularities of each stage of the life cycle. Stakeholders of the projects influence in a high proportion the performance of the projects through the interests, of the intervention force and of influence on the scope and the objectives set. In this paper, the influence of the stakeholders on the performance of the projects in the closing phase was analyzed, from the perspective of how an influence on the impact and sustainability of the project can be exercised. The research results highlight the importance of establishing an integrated strategy for stakeholder approach, in accordance with the performance requirements imposed.
Physicians Professional Immunity in the COVID-19 Pandemic. Problems and Solutions
Authors: Rotila Viorel 
Published: October 2021

In this article, by professional immunity we refer to limitation of liability to the specific pandemic context, respectively to the concrete possibilities of diagnosis, treatment, care and too few degrees of professional freedom still available. The relevance of one or another of the limitation measures of professional liability depends on the specific legal context of each community. Our thesis is that, regardless of the form of transposition into practice, a form of health professionals protection, such as professional immunity is necessary. From the multitude of possible protection measures, each state can select the appropriate ones. The need for specific measures for professional immunity is not identical in each state, depending on the specifics of the legal system, social values, measures characteristics taken to combat the pandemic, the degree of transparency of each healthcare system, the level of bioethical principles influence. However, this need doesn`t start from "no measure", the appropriate minimum level of protection seemingly to constitute a patient compensation no-fault model, plus the characteristics of the professional immunity, designed to adapt liability to specific conditions. The main problem in the absence of professional immunity is the risk of transferring the cost of ignorance, visible, in the inadequate expectations of medical science, on healthcare professionals, the limits of scientific knowledge risking to be reinterpreted as medical fault. The COVID-19 pandemic has somehow forced an additional step towards broadening discussions on universal human rights, being forced to consider ways of putting them into practice in the context of limited resources. Assuming that the increase in social complexity increases the risks of such events, we approach these problems from the perspective of creating rapid mechanisms to adapt to such changes, the lessons learned now being applied in the future to other similar cases.
Development and validation of a prognostic model of vertebral refracture after percutaneous kyphoplasty
Authors: Yuan Feng 
Published: October 2021

Abstract
Purpose: To investigate the factors influencing refracture after percutaneous kyphoplasty and to develop and validate a prognostic model.Method: We retrospectively collected clinical data in 392 patients with osteoporotic vertebral compression fractures who underwent percutaneous kyphoplasty at the Affiliated Hospital of Xuzhou Medical University from 1 January 2018 to 1 January 2020.Predictors significantly associated with refracture after PKP were selected based on last absolute shrinkage and selection operator regression. Then a prognostic model were developed and internal validated using enhanced Bootstrap validation.Results: Among the 392 patients who included in this study, there were 19 refracture after percutaneous kyphoplasty(4.8%). Four factors were selected by least absolute shrinkage and selection operator regression for significant association with refracture after percutaneous kyphoplasty, including body mass index, bone mineral density, unilateral puncture, and bone cement leakage. After enhance Bootstrap validation, the bias-corrected curve of the model fitted well with the apparent curve, with the area under ROC curve of 0.931 and 95% CI of (0.789,0.936).Conclusion: The prognostic model developed based on four clinical profiles: body mass index, bone mineral density, unilateral puncture, and bone cement leakage can be used to identify those at most risk of refracture after percutaneous kyphoplasty.
Combined Effects of Low pH and High Water Temperature Conditions on Oxidative Stress and Cell Damage in Juvenile Olive Flounder Paralichthys Olivaceus
Authors: Lee Dae-Won , Song Jin Ah , Park Heung Sik , Choi Cheol Young 
Published: October 2021

Abstract
The use of fossil fuels by anthropogenic activities causes ocean acidification and warming, and the combined conditions of these two environments can negatively affect fish metabolism, growth, and survival. Additionally, it can affect the antioxidant enzyme activity and cell damage caused by lipid peroxidation. In this study, we explores the adaptive potential for future marine conditions by investigating the stress and antioxidant enzyme activity, and apoptosis of juvenile olive flounder in an environment where ocean acidification and warming coexist. We found that juvenile olive flounder had increased oxidative stress and apoptosis under both warming and combined warming, and acidification conditions. Additionally, the effect on acidification under warming conditions does not seem to exceed the effect of high temperature conditions, and it is considered that the effect of acidification at low water temperatures is greater.
DFT Study of The Interaction Characteristics Between the Organic Matter and Minerals In Coal-Series Kaolin
Authors: Huang Teng , Shaomin Lei , Zhihao He , Chen Man , Li Men 
Published: October 2021

Abstract
Coal-series kaolin is an associated mineral resource in coal mining process, often contains organic components and other discoloring impurities, which may lower the quality and limit the industrial application. However, the occurrence, stability of organic component and how they affect the surface physical and chemical properties of coal-series kaolin is known little. In this article, several representative organic components have been enrolled for analyzing the interactions with different minerals of the coal-series kaolin. Results shows that the unsaturated double bonds may be easier to adsorb with kaolinite, and the energy on C20H40 is the least among all the compositions. Among the different crystal planes of kaolinite, the (001) surface may possess higher adsorption characteristic on the organic molecules, which may be consistent with the crystal face index of the kaolinite. While the adsorption energy between the organic molecules and the impurities in coal-series kaolin was positive all the time, suggesting that the organic matter could only adsorb with kaolinite compared with the impurities such as pyrite, quartz and anatase. Calculations of state density also showed that the displacement of the energy band for kaolinite may shift to the lower state after adsorbed with different organic matter, also a rearrangement and significant increase of peak values for the state density may occur after adsorption. This study aims to provide a theoretical basis for the occurrence state and stability differences of different organic matters on the coal-series kaolin, also further solve the long-term problems of restricting the whiteness and comprehensive utilization of coal-series kaolin resources.
Thin-Walled Tube Made of AZ31 Magnesium Alloy Fabricated by New Compound Extrusion Including Direct Extrusion and Multi-pass Bending
Authors: lin LI Xing , Hu Hongjun , Huiling Zhang , Hui Zhao , Dingfei ZHANG , Zhongwen OU 
Published: October 2021

Abstract
A new severe plastic deformation for manufacturing thin-walled tube made of AZ31 magnesium alloy called TEB(Tube-Extrusion-Bending ) process, which combines direct extrusion with two step bending,has been developed to manufacture tube.The TEB process has been researched by using finite element modeling (FEM) method. The rules of extrusion temperatures and the extrusion forces varying with process parameters have been developed. A TEB process with installed containers and dies has been constructed to perform tests in order to validate the FEM model with different process conditions. And the microstructures evolution have been researched based on effective strains evolution. The results showed that refined and uniform microstructures can be achieved by TEB process. The research results showed that the TEB process would produce the serve plastic deformation and improve the recrystallization of the grains.The comparisons of FEM simulation and experimental results have been made to obtain the relative important principles of TEB process.
Neural Network Modeling of NiTiHf Shape Memory Alloy Transformation Temperatures
Authors: Abedi Hossein , Qattawi Ala 
Published: October 2021

Abstract
Machine Learning (ML) techniques enabled the effective correlation of alloy characteristics. In this paper, an ML Neural Network (NN) model is proposed to predict the transformation temperatures (TTs) of NiTiHf for a given combination of elemental composition and processing parameters within an acceptable confidence interval. The main challenge in NiTiHf TTs prediction is the high dimensional dependency of TTs to various parameters as well as not fully clear governing physics. Considerable experimental research was performed from 1995 to design the NiTiHf TTs which in turn paved the path to feed the ML algorithms which are now presenting an excellent approach for material design. A thorough data set is constructed from both unpublished data and available literature and then analyzed to select twenty input parameters to feed the NN model. To model and forecast the TTs of NiTiHf with a wide range of TTs up to 800°C, a total of 173 data points are gathered, verified, and selected. The model's overall determination factor (R2 )was 0.92, indicating the viability of the proposed NN model in showing the link between material composition, processing factors, and then defining the TTs of NiTiHf alloy. The effort additionally validates the generated results against existing data in the literature. The validation confirms the significance of the proposed model.