bluuebunny/crossref_metadata_2025_split huggingface dataset:
Semi-waves and spreading speeds of stage-structured diffusive competition model with a free boundary
Authors: Tang Yaobin , Dai Binxiang 
Published: December 2022

Abstract
A stage-structured diffusive competition model with a free boundary is considered. The main aim of this paper is to study the evolution of the mature invasive species with competitive ability, and determine whether it disrupts the stable ecosystem provided by native species. According to the long-time behaviors under the case of weak-strong competition, strong-weak competition and weak competition, we obtain respectively the exact asymptotic spreading speed by delay-induced semi-wave problems if the spreading of invasive species occurs. And we demonstrate that, as the moving coefficient goes to infinite, the corresponding Cauchy problem can be viewed as the limiting profile of model and the asymptotic spreading speed approaches the minimal speed of the corresponding traveling wavefront solutions. Moreover, under strong-weak competition situation, the asymptotic spreading speed of invasive species is decreasing with respect to the maturation time.
Mathematics Subject Classification 35K57, 35R35, 35B40, 92D25
Xgression The Dynamic and Explainable Regression/Classification Solution
Authors: Chinnakornsakul Thaphon , Chinnakornsakul Thaphon 
Published: December 2022

Abstract
Xgression is the solution to find relationships between data to an equation by constructing computational tree that represent the steps of calculation from inputs to an output of algorithm then modify the tree with various operator to find the optimal solution. As the result Xgression can perform many forms of regression without setting initial equations or parameters
Novel dynamical behaviors of interaction solutions of the new (3+1)-dimensional integrable fourth-order nonlinear equation
Authors: Liu Na , Gao Fangjie 
Published: December 2022

Abstract
In this paper, the breather wave, rouge wave and interaction solutions of lumps and various solitary waves of the (3+1)-dimensional integrable fourth-order nonlinear equation are discussed. With the aid of the extended homoclinc test, the breather wave and rouge wave are gained. Subsequently, the interaction solutions between a lump wave and 1-kink soliton or 2-kink soliton are studied. In addition, four types of interaction solutions between lump, kink and periodic waves via a “rational-cosh-cos” type test function are constructed. Moreover, the dynamical characteristics of these obtained solutions are displayed using graphical analysis.
Relationship between covariance of Wigner functions and transformation noncontextuality
Authors: Catani Lorenzo 
Published: December 2022

Abstract
We investigate the relationship between two properties of quantum transformations often studied in popular subtheories of quantum theory: covariance of the Wigner representation of the theory and the existence of a transformation noncontextual ontological model of the theory. We consider subtheories of quantum theory specified by a set of states, measurements and transformations, defined specifying a group of unitaries, that map between states (and measurements) within the subtheory. We show that if there exists a Wigner representation of the subtheory which is covariant under the group of unitaries defining the set of transformations then the subtheory admits of a transformation noncontextual ontological model. We provide some concrete arguments to conjecture that the converse statement also holds provided that the underlying ontological model is the one given by the Wigner representation. In addition, we investigate the relationships of covariance and transformation noncontextuality with the existence of a quasiprobability distribution for the theory that represents the transformations as positivity preserving maps. We conclude that covariance implies transformation noncontextuality, which implies positivity preservation.
The effect of roughness on the boundary condition on porous wall
Authors: Marusic-Paloka Eduard , Pazanin Igor 
Published: December 2022

Abstract
The effects of roughness on the Darcy boundary condition for the Stokes system is studied using rigorous asymptotic analysis and homogenization techniques. Starting from the Stokes system in domain with porous part of the boundary and assuming that the porous boundary is periodically oscillating, we determine the effective permeability as a function of roughness.
AMS Subject Classification. 35B27, 76S99, 76M50
Penalized Regression Splines in Mixture Density Networks
Authors: Seifert Quentin Edward , Thielmann Anton , Bergherr Elisabeth , Säfken Benjamin , Zierk Jakob , Rauh Manfred , Hepp Tobias 
Published: December 2022

Abstract
Mixture Density Networks (MDN) belong to a class of models that can be applied to data which cannot be sufficiently described by a single distribution since it originates from different components of the main unit and therefore needs to be described by a mixture of densities. In some situations, however, MDNs seem to have problems with the proper identification of the latent components. While these identification issues can to some extent be contained by using custom initialization strategies for the network weights, this solution is still less than ideal since it involves subjective opinions. We therefore suggest replacing the hidden layers between the model input and the output parameter vector of MDNs and estimating the respective distributional parameters with penalized cubic regression splines. Applying this approach to data from Gaussian mixture distributions as well gamma mixture distributions proved to be successful with the identification issues not playing a role anymore and the splines reliably converging to the true parameter values.
Castability of Cu-Al-Mn shape memory alloy in a rapid investment casting process: computational and experimental analysis
Authors: Albuquerque Carlos Eduardo da Silva , Grassi Estephanie Nobre Dantas , De Araujo Carlos Jose 
Published: December 2022

Abstract
Comparisons between virtual prototyping and experimental results are notably beneficial for the development of investment casting processes. In this research, such a comparison aimed to study the castability of a Cu-Al-Mn shape memory alloy (SMA) in a modified centrifugal investment casting process that uses centrifugal force to inject the molten metal into the mold. Virtual prototyping was numerically simulated using ProCAST software applying a rectangular mesh part design. The real and virtual parts were examined for mold filling (castability), pore formation and solidification time. Using Whitlook's methodology, it was possible to validate the model created in the ProCAST software to simulate the modified investment casting process, detecting results regarding filling, solidification and porosity with a high degree of accuracy and reliability. In addition to the validation of the developed model, this work also presents estimated values for interface heat transfer coefficient (IHTC) of the metal/mold of aluminum bronze (Cu-Al and Cu-Al-Mn) alloys poured by gravity and centrifugation into plaster molds. Among the obtained values, the IHTC for the 86.7Cu-7.9Al-5.4Mn SMA were estimated at 535 W/m²K when poured by centrifugal force and 75 W/m²K by gravity. Ultimately, it was possible to verify that Cu-Al based shape memory alloy presents a high castability and a low cooling rate.
Association of Urbanization with Psychological Well-Being in Chinese Adults Aged 50 Years and Older: A Population-Based Study
Authors: Li Dianjiang , Ruan Yuhui , Kang Qi , Rong Chao 
Published: December 2022

Abstract
Background
China has undergone unprecedented urbanization in the past decades, with this rapid urbanization having profound and lasting impacts on human well-being. The aim of this study was to examine the association between urbanization and psychological well-being (PWB) in China.
Methods
Data was obtained from the 2015 China Health and Nutrition Survey and included 3,071 men and 3,385 women aged 50 years or older who lived in 288 communities across 12 provinces and municipalities. The urbanization index, summarizing 12 urbanization dimensions at community level, was categorized into tertiles representing low, medium and high levels of urbanization. PWB was assessed by scoring three self-reported questions. Gender-stratified multilevel analyses (level-1, individuals; level-2, communities; level-3: provinces/municipalities) were used to estimate the association between exposure to urbanization and PWB.
Results
The urbanization index was associated positively with PWB in middle-aged and elderly people after controlling for individual-level factors, with the association being stronger in women than in men. More specifically, an increase of one standard deviation in the score of community population density, economic activity, housing, education, sanitation, and diversity were associated significantly with PWB in both genders after adjustment for individual-level factors. In addition, the increase in the score of community communications, social services, transportation, and modern markets were also associated significantly with PWB in women, but not in men.
Conclusions
Urbanization has, on average, had an independent and positive effect on PWB in middle-aged and elderly Chinese populations, with many components of urbanization being separately and positively associated with PWB, especially in women. These findings provide novel insights for decision-makers on how to equitably allocate public resources to improve human well-being in the face of rapid urbanization.
Spectroscopic Properties of $\mathit {B}$ and $\mathit {B_s}$ meson using Screened Potential
Authors: Patel Vikas , Chaturvedi Raghav , Rai Ajay Kumar 
Published: December 2022

Abstract
We compute the masses of the ground, orbitally, and radially excited states in response to recent observations of the $B$ and $B_s$ meson states at the LHCb\cite{Aaij:2020hcw}. In addition, we calculate the electromagnetic transition widths, leptonic decay width, decay constant, and appropriate branching ratios. The Hamiltonian includes relativistic corrections to the potential and kinetic energy terms in the form of ${\cal{O}}\left(\frac{1}{m}\right)$ and ${\cal{O}}(p^{10})$. The gaussian wave function is used to solve the screening potential. The Regge trajectories are constructed using the estimated masses, and this allows us to associate some recently observed states with the $B$ and $B_s$ meson families. Overall, the findings of this study are in reasonable agreement with existing experimental and theoretical researches.
A Study on use of Waste Materials as Partial Replacement of Coarse Aggregate in Concrete
Authors: JAIN AYUSH , AGRAWAL GAURAV KUMAR , VERMA PRIYANKA 
Published: December 2022

Abstract
Background: More development approaches more litter, more litter makes natural worries of harmful danger. The use of litter materials for future new products would be a cost-effective and realistic solution to this problem, reducing the tremendous pressure on the country's landfills. Reusing litter as development materials save regular assets, saves energy, diminishes strong waste, brings down air and water contamination, and brings down ozone-depleting substance outflows. The development area can start to recognize and benefit from the advantages of using trash and repurposed materials. Acceptable litter, reused and reusable materials, and strategies have all been explored in numerous studies.
Scope and approach: Due to the scarcity and rising expense of raw materials, the use of shattered tiles, glass, granite in structural components are used in this study. Compressive strength, workability, unit weight, density, cost of concrete made of litter material will be tested in this study. A comparison of all test findings of concrete formed of litter materials with conventional concrete will be done to break down present practices in the building industry regarding litter use and reused materials.
Key findings and conclusion: This study provides an early knowledge of the practice's current strengths and flaws to assist the construction industry in formulating appropriate policies governing the use of trash and reused substances as improvement materials.Nine Samples were used with different proportion and mixes and it was found that 10 % partial replacement of coarse aggregate with glass achieved 26.83 % & 6.39 % more strength than target mean compressive strength (fm) of M20 conventional concrete for 7 & 28 days respectively. 7 day density & 28 day density of concrete cube made with 10 % partial replacement of glass with coarse aggregate was 1.75 % & 0.45 % less than the conventional concrete, this make concrete light and gives more target mean compressive strength (fm) than conventional concrete. All Samples come under medium degree of workability. Slump values are directly proportional to percentage of replacement. Use of this type of concrete will also reduce the dead load of the structure by 0.45 %. Saving of 10 % cost of aggregate can done by using concrete made with 10 % partial replacement of glass with coarse aggregate.
Weakly Nonlinear Thermohaline Rotating Convection in a Sparsely Packed Porous Medium due to Horizontal Magnetic Field
Authors: Avula Benerji Babu , Rao N.Venkata Koteswara , Reddy G.Shiva Kumar 
Published: December 2022

Abstract
Linear and weakly non-linear thermohaline rotating convection in a sparsely packed porous medium with an imposed horizontal magnetic eld is studied analytically. In the linear stability analysis, the normal mode technique is employed to nd the critical Rayleigh number and it is calculated as a function of q, Ta, Q, Λ, Da, Pr 1, and Pr 2 . In order to study the secondary instabilities and heat transport by convection, the well-known equation Ginzburg-Landau equation is derived. The system of one dimensional coupled amplitude equations arederived at the onset of oscillatory convection to study the stability regions of steady state, Standing waves and Travelling waves.
Matrices de Investigación y Desarrollo del Proyecto de Tesis en los estudiantes de educación superior universitaria, 2020
Authors: Segovia Suller Cirilo 
Published: December 2022

El propósito de la investigación fue determinar la relación de asociación que existe entre las variables “Matrices de investigación” y el “Desarrollo del Proyecto de Tesis” en los estudiantes universitarios de educación superior. La investigación fue aplicada y el enfoque cuantitativo con característica observacional, transversal, retrospectivo y analítico. El nivel de investigación fue relacional. El diseño fue no experimental y mediante validación del instrumento. La técnica empleada fue la observación, encuesta y fuentes documentales. El instrumento empleado fue un cuestionario estructurado y cerrado con escala Likert. La población en estudio fueron los estudiantes de la Facultad de Ciencias Empresariales de una universidad privada y la muestra fueron los estudiantes de la asignatura metodología de la investigación. El instrumento fue sometido al juicio de expertos para obtener la validez de contenido; a la prueba del Alfa de Cronbach para darle validez de criterio; y, se operacionalizó las variables, dimensiones e indicadores para darle validez de constructo. La relación de asociación de las variables y la contrastación de las hipótesis del investigador fue sometida a la prueba del Rho de Spearman. La misma que demostró que las matrices de investigación se relacionan positivamente con el desarrollo del proyecto de tesis en los estudiantes de educación superior universitaria.
Reducing disinfection byproduct precursors through coagulation enhancement as particle weight and size control using potassium permanganate
Authors: Bayomi Ahmed M. , Souaya Eglal R. , Ismail Eman H. , Mohamed Gehad G. , Hussein Mahmoud Mohamed Fouad 
Published: December 2022

Abstract
The widespread use of chlorine pre-oxidation in water purification has been limited in several countries owing to the production of carcinogenic byproducts when combined with naturally occurring organic matter. This study investigates the efficient use of potassium permanganate (KMnO4) pretreatment and coagulation enhancement as particle size and molecular weight distribution controlling parameters. KMnO4 pretreatment significantly reduced the apparent molecular weight of humic acid due to KMnO4 reduction and the continuous generation of manganese dioxide (MnO2) formed in situ under neutral and alkaline conditions. The MnO2 formed in situ had adsorption characteristics that enabled it to form large and stable flocs with the hydrolysis products of aluminum sulfate. However, under acidic conditions, KMnO4 pretreatment exhibited strong oxidation characteristics due to Mn(VII) reduction to Mn(II), and the mean particle floc size was the same as without KMnO4 pretreatment. Overall, KMnO4 pretreatment is a useful alternative strategy for traditional pre-oxidation using chlorine and a good coagulant enhancement agent in neutral and basic media.
Gamified Physical Rehabilitation for Older Adults With Musculoskeletal Issues: Pilot Noninferiority Randomized Clinical Trial
Authors: Randriambelonoro Mirana , Perrin Franck Caroline , Herrmann François , Carmona Gorki Antonio , Geissbuhler Antoine , Graf Christophe , Frangos Emilia 
Published: December 2022

Background
Resource-rich countries are facing the challenge of aging societies, a high risk of dependence, and a high cost of care. Researchers attempted to address these issues by using cost-efficient, innovative technology to promote healthy aging and regain functionality. After an injury, efficient rehabilitation is crucial to promote returning home and prevent institutionalization. However, there is often a lack of motivation to carry out physical therapies. Consequently, there is a growing interest in testing new approaches like gamified physical rehabilitation to achieve functional targets and prevent rehospitalization.

Objective
The purpose of this study is to assess the effectiveness of a personal mobility device compared with standard care in the rehabilitation treatment of patients with musculoskeletal issues.

Methods
A total of 57 patients aged 67-95 years were randomly assigned to the intervention group (n=35) using the gamified rehabilitation equipment 3 times a week or to the control group (n=22) receiving usual standard care. Due to dropout, only 41 patients were included in the postintervention analysis. Outcome measures included the short physical performance battery (SPPB), isometric hand grip strength (IHGS), functional independence measure (FIM), and the number of steps.

Results
A noninferiority related to the primary outcome (SPPB) was identified during the hospital stay, and no significant differences were found between the control and intervention groups for any of the secondary outcomes (IHGS, FIM, or steps), which demonstrates the potential of the serious game-based intervention to be as effective as the standard physical rehabilitation at the hospital. The analysis by mixed-effects regression on SPPB showed a group×time interaction (SPPB_I_t1=–0.77, 95% CI –2.03 to 0.50, P=.23; SPPB_I_t2=0.21, 95% CI –1.07 to 0.48, P=.75). Although not significant, a positive IHGS improvement of more than 2 kg (Right: 2.52 kg, 95% CI –0.72 to 5.37, P=.13; Left: 2.43 kg, 95% CI –0.18 to 4.23, P=.07) for the patient from the intervention group was observed.

Conclusions
Serious game-based rehabilitation could potentially be an effective alternative for older patients to regain their functional capacities.

Trial Registration
ClinicalTrials.gov NCT03847454; https://clinicaltrials.gov/ct2/show/NCT03847454
Ethical Issues in the Use of Smartphone Apps for HIV Prevention in Malaysia: Focus Group Study With Men Who Have Sex With Men
Authors: Khati Antoine , Wickersham Jeffrey A , Rosen Aviana O , Luces Jeffrey Ralph B , Copenhaver Nicholas , Jeri-Wahrhaftig Alma , Ab Halim Mohd Akbar , Azwa Iskandar , Gautam Kamal , Ooi Kai Hong , Shrestha Roman 
Published: December 2022

BackgroundThe use of smartphone apps can improve the HIV prevention cascade for key populations such as men who have sex with men (MSM). In Malaysia, where stigma and discrimination toward MSM are high, mobile health app-based strategies have the potential to open new frontiers for HIV prevention. However, little guidance is available to inform researchers about the ethical concerns that are unique to the development and implementation of app-based HIV prevention programs.ObjectiveThis study aimed to fill this gap by characterizing the attitudes and concerns of Malaysian MSM regarding HIV prevention mobile apps, particularly regarding the ethical aspects surrounding their use.MethodsWe conducted web-based focus group discussions with 23 MSM between August and September 2021. Using in-depth semistructured interviews, participants were asked about the risks and ethical issues they perceived to be associated with using mobile apps for HIV prevention. Each session was digitally recorded and transcribed. Transcripts were inductively coded using the Dedoose software (SocioCultural Research Consultants) and analyzed to identify and interpret emerging themes.ResultsAlthough participants were highly willing to use app-based strategies for HIV prevention, they raised several ethical concerns related to their use. Prominent concerns raised by participants included privacy and confidentiality concerns, including fear of third-party access to personal health information (eg, friends or family and government agencies), issues around personal health data storage and management, equity and equitable access, informed consent, and regulation.ConclusionsThe study’s findings highlight the role of ethical concerns related to the use of app-based HIV prevention programs. Given the ever-growing nature of such technological platforms that are intermixed with a complex ethical-legal landscape, mobile health platforms must be safe and secure to minimize unintended harm, safeguard user privacy and confidentiality, and obtain public trust and uptake.