bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental and numerical investigations on heat transfer in fused filament fabrication 3D-printed specimens
Authors: Ramos Nathalie , Mittermeier Christoph , Kiendl Josef 
Published: September 2021

AbstractA good understanding of the heat transfer in fused filament fabrication is crucial for an accurate stress prediction and subsequently for repetitive, high-quality printing. This work focuses on two challenges that have been presented when it comes to the accuracy and efficiency in simulating the heat transfer in the fused filament fabrication process. With the prospect of choosing correct thermal boundary conditions expressing the natural convection between printed material and its environment, values for the convective heat transfer coefficient and ambient temperature were calibrated through numerical data fitting of experimental thermal measurements. Furthermore, modeling simplifications were proposed for an efficient numerical discretization of infill structures. Samples were printed with varying infill characteristics, such as varying air void size, infill densities and infill patterns. Thermal measurements were performed to investigate the role of these parameters on the heat transfer and based on these observations, possible modeling simplifications were studied in the numerical simulations.
Auftragsmord und Anstiftung zum Mord als Varianten des Intimizids
Authors: Dietz E. , Schädler J. , Püschel K. , Ondruschka B. 
Published: September 2021

ZusammenfassungDargestellt wird der Fall eines Intimizids, bei dem sich ein Ehemann durch Anstiftung zum Mord seiner Ehefrau entledigen wollte. Auftragsmorde bzw. Anstiftungen zum Mord innerhalb von Paarbeziehungen stellen ein Ausnahmegeschehen dar. Hier sollen die Facetten einer umfangreichen kriminalistischen Fallbearbeitung dargestellt werden, die neben rechtsmedizinischen Erkenntnissen auch wesentliche psychiatrische, psychologische und kriminalistische Aspekte der Tatbegehung bzw. -anstiftung beleuchtet.
„Skills fOr Life Adjustment and Resilience“ Programm
Authors: Lotzin Annett , Hinrichsen Imke , Kenntemich Laura , Freyberg Renée-Christin , Lau Winnie , Gibson Kari , O’Donnell Meaghan 
Published: September 2021

Zusammenfassung
Hintergrund
Nach Katastrophen, Traumata und anderen schweren Belastungen entwickelt ein Teil der Betroffenen eine psychische Erkrankung, während ein weiterer Teil anhaltende subklinische Belastungen zeigt, die das psychosoziale Funktionsniveau einschränken. Anhaltend subklinisch belastete Menschen erhalten jedoch selten psychosoziale Unterstützungsangebote.

Ziel der Arbeit
Vorgestellt wird das Programm „Skills fOr Life Adjustment and Resilience“ (SOLAR), eine Kurzintervention für Menschen mit anhaltender subklinischer Belastung nach Katastrophen und anderen schweren Belastungen. Erste Ergebnisse einer Pilotstudie zur Zufriedenheit mit dem Programm bei Betroffenen werden berichtet.

Methoden
Das SOLAR-Programm wurde von einem internationalen Konsortium, zusammengesetzt aus Katastrophen- und Traumaexperten, entwickelt. Es beinhaltet 5 wöchentliche Gruppensitzungen, in denen verhaltenstherapeutische Elemente vermittelt werden. Im Rahmen der Pilotstudie nahmen 15 Teilnehmende im Präsenzformat und 15 Teilnehmende mithilfe einer Videokonferenzschaltung während der „Coronavirus Disease 2019“ (COVID-19) Pandemie am SOLAR Programm teil. Nach Abschluss beantworteten die Teilnehmenden den Fragebogen zur Messung der Patientenzufriedenheit (ZUF-8).

Ergebnisse
Die Teilnehmenden waren „weitgehend“ bis „sehr zufrieden“. In der Präsenzgruppe war die Zufriedenheit über alle Aspekte hinweg geringfügig stärker ausgeprägt als in der Onlinegruppe. Die TrainerInnen bewerteten das Programm als gut durchführbar.

Schlussfolgerung
Das SOLAR-Programm ist eine vielversprechende Kurzintervention bei anhaltender subklinischer Belastung nach schweren Belastungen, die im Präsenz- oder im videogestützten Format weiter auf seine Wirksamkeit erprobt werden sollte. Im Beitrag werden Praxisempfehlungen zur Durchführung gegeben.
CFD analysis on the oil flow of a gear stage with guide plate
Authors: Hildebrand Lucas , Dangl Florian , Sedlmair Martin , Lohner Thomas , Stahl Karsten 
Published: September 2021

AbstractGearbox housing geometry and oil guide plates strongly influence gearbox oil flow and interaction of oil with machine elements. Guided oil flow can increase gearbox efficiency and improve heat management. Recent research studies have demonstrated the potential of Computational Fluid Dynamics (CFD) simulations to predict the gearbox oil flow and no-load losses. Thereby, the influence of housing geometry and guide plates has rarely been addressed. This study focuses on a CFD analysis on the oil flow of a dip lubricated spur gear stage with a guide plate. Grid-based CFD models with different simulation setups were confronted and evaluated. Results show that the selection of the simulation setup with respect to the acceleration ramp and mesh size needs to address the considered object of investigation and the desired depth of information. An appropriate simulation setup shows great accordance with recordings of the oil distribution by a high-speed camera. A detailed analysis of the simulation results identified the contribution of different gear surface zones to the no-load gear loss torque. For the considered guide plate a strong interaction of oil flow and loss torque due to pressure forces on the tooth flank surface zones and due to shear forces on the front and tip circle surface zones of the gears was determined.
Approach for multiscale modeling the thermomechanical tool load in gear hobbing
Authors: Troß Nico , Brimmers Jens , Bergs Thomas 
Published: September 2021

AbstractIn this report, an approach is presented how a geometric penetration calculation can be combined with FE simulations to a multiscale model, which allows an efficient determination of the thermomechanical load in gear hobbing. FE simulations of the linear-orthogonal cut are used to derive approximate equations for calculating the cutting force and the rake face temperature. The hobbing process is then simulated with a geometric penetration calculation and uncut chip geometries are determined for each generating position. The uncut chip geometries serve as input variables for the derived equations, which are solved at each point of the cutting edge for each generating position. The cutting force is scaled according to the established procedure of discrete addition of the forces along the cutting edge over all individual cross-section elements. For the calculation of the temperature, an approach is presented how to consider a variable chip thickness profile. Based on this, the temperature distribution on the rake face is calculated. The model is verified on the one hand by cutting force measurements in machining trials and on the other hand by an FE simulation of a full engagement of a hob tooth.
Comparison results for solutions to p-Laplace equations with Robin boundary conditions
Authors: Amato Vincenzo , Gentile Andrea , Masiello Alba Lia 
Published: September 2021

AbstractIn the last decades, comparison results of Talenti type for Elliptic Problems with Dirichlet boundary conditions have been widely investigated. In this paper, we generalize the results obtained in Alvino et al. (Commun Pure Appl Math, to appear) to the case of p-Laplace operator with Robin boundary conditions. The point-wise comparison, obtained in Alvino et al. (to appear) only in the planar case, holds true in any dimension if p is sufficiently small.
Suicidality and Personality Pathology in Adolescence: A Systematic Review
Authors: Moselli Marta , Casini Maria Pia , Frattini Camilla , Williams Riccardo 
Published: September 2021

AbstractThis work presents a review of research papers examining the role of emerging personality pathology in suicidal ideation and behaviours in adolescence. Initially, 226 studies were selected in line with PRISMA guidelines, and 33 articles were finally included in this review. The data show percentages of any personality disorder diagnosis ranging from 19.5 to 22.8% in suicide attempters, while in autopsy studies, the rate of personality disorder diagnosis varied between 29.6 and 42.1%. The overwhelming majority of the studies focus on the role of borderline personality disorder (BPD) in suicidal behaviours, also highlighting its predictive role at a longitudinal level. Furthermore, the literature review shows that personality traits supposed to underlie BPD, such as affective instability, impulsivity and identity diffusion, have specific predictive links with suicidal conduct. Other personality pathology dimensions, such as aggressiveness, sadism and perfectionism that are associated with other personality disorders, namely, antisocial and narcissistic personality disorders, have also shown a significant mediating role for suicidal risk. Overall, these results seem to parallel the role of personality pathology in predicting suicide in adulthood and point to the relevance of assessing the presence of emerging patterns of personality disorders for the clinical management of suicidal risk in adolescence.
Self-adaptive macroslip array for friction force prediction in contact interfaces with non-conforming meshes
Authors: Battiato Giuseppe 
Published: September 2021

AbstractThe steady-state nonlinear forced response (NFR) of finite element (FE) models with friction joints is usually computed in the frequency domain through the combination of node-to-node contact elements and the Harmonic Balance Method (HBM). In the current state of the art, rare are the cases where the friction forces are estimated for contact interfaces with non-conforming mesh grids. This need is nowadays taking place due to the improving capability of commercial FE software to manage any kind of boundary condition (i.e., either coupling or contact), without requiring coincident pairs of nodes at the joint interfaces. Such an advantage becomes a drawback when the analysts are requested to investigate the NFR of the assembly by using build-in codes, where the contact forces prediction usually requires node-to-node contact elements whose parameters (i.e., the contact stiffnesses and friction coefficients) can be easily identified by means of experiments. This paper addresses the mentioned limitation, and proposes a novelself-adaptive macroslip array(SAMA) model for the estimation of the nonlinear friction forces on FE contact interfaces with non-conforming meshes. The SAMA model consists on a set of node-to-node contact elements ordered in parallel, whose contact parameters and normal preloads are identified through a step-by-stepself-adaptiveweighting algorithm that depends on the topology of the meshes in contact. The goodness of the proposed model is assessed on the calculation of the NFR of a bladed disk with shroud contacts, under the hypotheses of cyclic symmetry and HBM. The nonlinear dynamic behavior of the bladed disk is evaluated in two different cases. First, in the case of lack of node-to-node congruence at the contact interface for the structure being in its undeformed configuration, and second, in the case of a relevant static misalignment of the contact interfaces due to the application of large static loads.
The Effect of Additive Chemical Structure on the Tribofilms Derived from Varying Molybdenum-Sulfur Chemistries
Authors: Barnes Aaron L. , Morina Ardian , Andrew Rhiann E. , Neville Anne 
Published: September 2021

AbstractMolybdenum disulfide (MoS2) is an effective friction modifier that can be formed on surfaces from oil-soluble lubricant additives. Different additive chemistries can be used to form MoS2 on a surface. The tribofilms formed from three different molybdenum additives (MoDTC Dimer, MoDTC Trimer, and molybdate ester) were studied in additive monoblends and fully formulated systems. The resulting tribofilms were then characterized by Raman spectroscopic spatial mapping, XPS, and FIB-TEM. The distribution of MoS2 on the surface was much more sparse for the molybdate ester than the other additives. No crystalline molybdenum oxides were observed by Raman spectroscopy, but their presence was inferred from XPS analysis. XPS analysis showed very similar distributions of Mo oxidation states from each additive, such that the chemical nature of the films formed from all of the additives is likely similar. Each of the additive tribofilms was observed to have MoS3 vibrations in Raman and persulfide XPS peaks associated with amorphous MoS3, as such this species is presented as a common frictional decomposition product for all the additives. The MoDTC trimer is more able to produce this amorphous species on the contacting surfaces due to its structural similarities to the co-ordination polymer MoS3.
Graphical Abstract
MiR-200c-3p aggravates gastric cell carcinoma via KLF6
Authors: Wang Ying , Lu Kaijuan , Li Weibing , Wang Zhigang , Ding Jing , Zhu Zeyu , Li Zhipeng 
Published: September 2021

Abstract
Background
Gastric cell carcinoma (GCC) is a common and high-incidence malignant gastrointestinal cancer that seriously threatens human life and safety. Evidences suggest that microRNAs (miRNAs) exhibit an essential role in regulating the occurrence and development of GCC, while the effects and possible mechanisms remain to be further explored.

Objective
This study was designed to explore whether miR-200c-3p exerted its functional role in the growth and metastasis of GCC, and investigate the possible mechanisms.

Methods
The expression levels of miR-200c-3p in GCC tissues and cell lines were detected by qRT-PCR analysis. The functional role of miR-200c-3p in the viability, proliferation, migration and invasion of GCC cells were evaluated by CCK-8, EdU, wound healing and Transwell assays. In addition, the candidate targets of miR-200c-3p was predicted and confirmed by dual-luciferase reporter assay. Moreover, the relationship between miR-200c-3p and target (Krüppel like factor 6, KLF6) was assessed by qRT-PCR and western blot assays. Besides, the expression levels of KLF6 in GCC cells were determined by qRT-PCR and western blot assays. Furthermore, the role of KLF6 in the viability, proliferation, migration and invasion of GCC cells mediated with miR-200c-3p mimics was evaluated by CCK-8, EdU, wound healing and Transwell assays.

Results
In the present study, a new tumor promoting function of miR-200c-3p was disclosed in GCC. We found that the expression of miR-200c-3p was obviously increased in clinic GCC tissues and cell lines. In addition, down-regulation of miR-200c-3p suppressed cell viability, proliferation, migration, and invasion in GCC cells. Moreover, KLF6 was verified as a direct target of miR-200c-3p by binding its 3’-UTR. Additionally, KLF6 was remarkably decreased and was negatively associated with the miR-200c-3p expression in GCC cell lines. Furthermore, over-expression of KLF6 retarded the effects of miR-200c-3p on the growth and metastasis of GCC cell lines.

Conclusions
MiR-200c-3p potentially played a tumor-promoting role in the occurrence and development of GCC, which may be achieved by targeting KLF6.

Graphic abstract
DPM model segregation validation and scaling effect in a rotary drum
Authors: Patil Amit V. , Hofsteenge Jesse , Bujalski Jakub M. , Johansen Stein T. 
Published: September 2021

AbstractDiscrete phase method (DPM) model was used to analyse rotary drum systems for segregation behavior. DPM simulations were performed for comparison with a dynamic segregation experimental measurement from the literature. This included dynamic segregation and time-averaged particle velocity field, which were validated with experimental data. In addition, a direct DPM and parcel scaled DPM simulation study was performed to analyse the effect of drum and particle parcel size scaling. The segregation dynamics was evaluated using the Lacey mixing index. This work shows segregation dynamics decreases with increasing drum size while keeping the same particle size. It further shows that for a given drum size the segregation dynamics deviate after a certain particle parcel scaling limit. The parcel scaling limit also increases with increasing drum size.
Characteristic strength and acoustic emission properties of weakly cemented sandstone at different depths under uniaxial compression
Authors: Liu Bin , Zhao Yixin , Zhang Cun , Zhou Jinlong , Li Yutao , Sun Zhuang 
Published: September 2021

AbstractAs coal mining is extended from shallow to deep areas along the western coalfield, it is of great significance to study weakly cemented sandstone at different depths for underground mining engineering. Sandstones from depths of 101.5, 203.2, 317.3, 406.9, 509.9 and 589.8 m at the Buertai Coal Mine were collected. The characteristic strength, acoustic emission (AE), and energy evolution of sandstone during uniaxial compression tests were analyzed. The results show that the intermediate frequency (125–275 kHz) of shallow rock mainly occurs in the postpeak stage, while deep rock occurs in the prepeak stage. The initiation strength and damage strength of the sandstone at different depths range from 0.23 to 0.50 and 0.63 to 0.84 of peak strength (σc), respectively, decrease exponentially and are a power function with depth. The precursor strength ranges from 0.88σc to 0.99σc, increases with depth before reaching a depth of 300 m, and tends to stabilize after 300 m. The ratio of the initiation strength to the damage strength (k) ranges from 0.25 to 0.62 and decreases exponentially with depth. The failure modes of sandstone at different depths are tension-dominated mixed tensile-shear failure. Shear failure mainly occurs at the unstable crack propagation stage. The count of the shear failure bands before the peak strength increases gradually, and increases first and then decreases after the peak strength with burial depth. The cumulative input energy, released elastic energy and dissipated energy increase with depth. The elastic release rate ranges from 0.46 × 10–3 to 198.57 × 10–3 J/(cm3 s) and increases exponentially with depth.
‘Come on, man!’ On errors, choice, and Hayekian behavioral economics
Authors: Sunstein Cass R. 
Published: September 2021

AbstractWith respect to the views of dead thinkers, answers to many particular questions are often interpretive in Ronald Dworkin's sense. Such answers must attempt (1) to fit the materials to be interpreted and (2) to justify them, that is, to put them in the best constructive light. What looks like (1), or what purports to be (1), is often (2). That is, when a follower of Kant urges that ‘Kant would say x’, or that ‘Kantianism entails y’, the goal is to make the best constructive sense of Kant and Kantianism, not merely to adhere to something that Kant actually said. An approach to behavioral economics cannot claim to be Hayekian if it is rooted in enthusiasm for the abilities of planners to set prices and quantities, or if it sees the price system as a jumble of mistakes and errors. But within a not-so-narrow range, a variety of freedom-preserving approaches, alert to the epistemic limits of planners, can fairly claim to be Hayekian. Hayekian behavioral economics, I suggest, is an approach that (1) recognizes the importance and pervasiveness of individual errors, (2) emphasizes the epistemic limits of planners, (3) builds on individual choices rather than planner preferences, and (4) gives authority to choices made under epistemically favorable conditions, in which informational deficits and behavioral biases are least likely to be at work. The key step, of course, is (4). If it is properly elaborated, the resulting approach deserves respect. It is worthy of serious consideration, even if some of us, including the present author, would not entirely embrace it. In defending that proposition, the present essay responds to some critical remarks on behaviorally informed policy, including the resort to ‘explainawaytions’ (Matthew Rabin's term) for behavioral findings.
The Protection of Human Rights in Pandemics—Reflections on the Past, Present, and Future
Authors: Dąbrowska-Kłosińska Patrycja 
Published: September 2021

AbstractThis special section tells the story of Covid-19 through the lens of national responses, serious concerns about unprecedented human rights limitations and infringements, and the respective role of courts in public health emergencies. It compiles perspectives on disease control developments in Brazil, Italy, Poland, Taiwan, the U.S., and the EU to explore various aspects of judicial review protecting, or failing to protect, human rights. It offers insights from states and regions which have experienced high pandemic rates or may attract attention for not treating human rights as a priority. Amidst the crisis of multilateralism and the World Health Organization (WHO) authority, and the fact that public health is typically a national power, the Articles focus on the state-level analyses to inspire comparative findings and further research. The section also draws on diversity and transdisciplinarity. The contributions are authored by scholars specializing in wide-ranging areas of law, including constitutional, health, private, and human rights law, as well as in political philosophy and public health. This text introduces the special section by offering a broader picture of the human rights’ problématique in times of pandemics.
Prevalence and underlying factors of mobile game addiction among university students in Bangladesh
Authors: Sayeed Md Abu , Rasel Md Shabbir Rahman , Habibullah Abrar Ahamed , Hossain Md Moyazzem 
Published: September 2021

Abstract

Background
Nowadays, the youth are more engaging with their more advanced smartphones having high-quality graphics and gaming features. However, existing literature depicts that adolescents suffer from several forms of psychological problems including mental health, depression, loneliness, insomnia and low self-control due to mobile game addiction. Therefore, this study aims to find the prevalence and motivating factors for mobile game addiction among university students of Bangladesh.

Methods
A cross-sectional survey was carried out to collect the required information from 1125 students of three universities in Bangladesh. Descriptive statistics, χ2 test and ordinal regression model are employed to meet the objective of this study.

Results
The findings reveal that male students are more likely to show addictive behaviours than their counterparts in the context of mobile game addiction. The results depict that loneliness, duration of using smartphones and playing mobile games, and source of entertainment are the main cause of mobile addiction. Also, more than half of the respondents (54.3%) are severely addicted to mobile games who were influenced by friends and YouTube gamers to play games. Moreover, students are suffering from several physical problems such as headaches, eye discomfort, blurry vision and ear discomfort.

Conclusion
Considering the findings of this paper, the authors suggest that the authorities should consider this immediately and arrange a positive entertainment environment to prevent students from mobile games. Furthermore, it is necessary to encourage students to participate in sports or other extracurricular activities that may be helpful to lessen mobile game addiction among students in Bangladesh.