bluuebunny/crossref_metadata_2025_split huggingface dataset:
Basic performance and future developments of BeiDou global navigation satellite system
Authors: Yang Yuanxi , Mao Yue , Sun Bijiao 
Published: January 2020

AbstractThe core performance elements of global navigation satellite system include availability, continuity, integrity and accuracy, all of which are particularly important for the developing BeiDou global navigation satellite system (BDS-3). This paper describes the basic performance of BDS-3 and suggests some methods to improve the positioning, navigation and timing (PNT) service. The precision of the BDS-3 post-processing orbit can reach centimeter level, the average satellite clock offset uncertainty of 18 medium circular orbit satellites is 1.55 ns and the average signal-in-space ranging error is approximately 0.474 m. The future possible improvements for the BeiDou navigation system are also discussed. It is suggested to increase the orbital inclination of the inclined geostationary orbit (IGSO) satellites to improve the PNT service in the Arctic region. The IGSO satellite can perform part of the geostationary orbit (GEO) satellite’s functions to solve the southern occlusion problem of the GEO satellite service in the northern hemisphere (namely the “south wall effect”). The space-borne inertial navigation system could be used to realize continuous orbit determination during satellite maneuver. In addition, high-accuracy space-borne hydrogen clock or cesium clock can be used to maintain the time system in the autonomous navigation mode, and stability of spatial datum. Furthermore, the ionospheric delay correction model of BDS-3 for all signals should be unified to avoid user confusion and improve positioning accuracy. Finally, to overcome the vulnerability of satellite navigation system, the comprehensive and resilient PNT infrastructures are proposed for the future seamless PNT services.
Addressing variability in iPSC-derived models of human disease: guidelines to promote reproducibility
Authors: Volpato Viola , Webber Caleb 
Published: January 2020

ABSTRACT
Induced pluripotent stem cell (iPSC) technologies have provided in vitro models of inaccessible human cell types, yielding new insights into disease mechanisms especially for neurological disorders. However, without due consideration, the thousands of new human iPSC lines generated in the past decade will inevitably affect the reproducibility of iPSC-based experiments. Differences between donor individuals, genetic stability and experimental variability contribute to iPSC model variation by impacting differentiation potency, cellular heterogeneity, morphology, and transcript and protein abundance. Such effects will confound reproducible disease modelling in the absence of appropriate strategies. In this Review, we explore the causes and effects of iPSC heterogeneity, and propose approaches to detect and account for experimental variation between studies, or even exploit it for deeper biological insight.
Molecular Tools to Detect Alloforms of Aβ and Tau: Implications for Multiplexing and Multimodal Diagnosis of Alzheimer’s Disease
Authors: Arora Harshit , Ramesh Madhu , Rajasekhar Kolla , Govindaraju Thimmaiah 
Published: January 2020

Abstract
The advancements in the field of imaging and diagnostics have been benefitted by the concurrent expansion of molecular probes space to monitor the diverse biological targets and events. The misfolding and aggregation of amyloid β peptide as well as Tau protein generate toxic polymorphic species (referred to as alloforms in this article) which are formally designated as core AD biomarkers by National Institute on Aging and Alzheimer’s Association Research Framework (NIA-AA 2018). Positron emission tomography and magnetic resonance imaging, which are currently the efficient and sophisticated techniques in the clinical diagnosis, are incapable of detection and differentiation of various alloforms besides being not easily operable and affordable by the common people. As a consequence, fluorescence optical imaging has gained great impetus besides many recent technological advancements that have positioned its sensitivity at par with PET and MRI in addition to offering the possibility of alloform detection, rapid analyses and economic benefits to cater to a larger population. In addition, there exists an array of biomarkers or pathophysiological conditions that are known to aggravate the disease progression. This emphasises the importance of molecular tools and methods for the detection of various known as well as yet to be identified AD biomarkers. The molecular and hybrid tools intended for detection and imaging of biomarkers inside the AD brain must cross the blood brain barrier which is one of the persistent challenges for synthetic organic chemists and in this context various strategies are discussed. In this review, we have proposed multiplexed and multimodal analytical approach for the in vitro and in vivo detection and imaging of the core and indirect biomarkers in brain and bio-fluids such as cerebrospinal fluid (CSF) and blood among others to generate characteristic fingerprints to distinguish between healthy and AD patients with precision. Overall, this review offers critical discussions on design, properties, functions, advantages and limitations of the existing molecular probes besides providing current and future prospects for the development of novel diagnostic and theranostic tools for AD.
Outshine to Outbid: Weather-Induced Sentiment and the Housing Market
Authors: Hu Maggie Rong , Lee Adrian D. 
Published: January 2020

This paper examines how sentiment affects homebuyers’ housing transaction decisions with a focus on auction sales. Utilizing housing transaction data in Sydney from 2000 to 2014, we find that transaction prices are significantly higher for auction sales compared with private sales, consistent with the notion of a “winner’s curse.” Four sentiment proxies, including three weather-based sentiment proxies and a survey-based sentiment index, are used to derive novel measures of sentiment, revealing that higher sentiment is associated with higher transaction prices, particularly for auction sales. Moreover, sentiment boosts sale prices particularly when the housing market is in boom; however, investors are not more prone to sentiment bias than are owner-occupiers. Sentiment exhibits an asymmetric effect in that low sentiment dampens price to a greater extent compared with the price-boosting effect of high sentiment. Our result is robust to using national sport events as sentiment shocks, selection bias, and participation constraints. Potential mechanisms include present-biased preferences and sentiment-related projection bias. Overall, our evidence sheds light on the role of sentiment in housing market decisions. This paper was accepted by Tyler Shumway, finance.
Three-dimensional reconstruction method based on bionic active sensing in precision assembly
Authors: Ding Zihao , Xu Hui , Chen Guodong , Wang Zheng , Chi Wenzheng , Zhang Heng , Wang Zhenhua , Sun Lining , Yang Guilin , Wen Yifang 
Published: January 2020

With the prevailing application of new materials and the higher
requirements for the quality and efficiency of production in the
equipment manufacturing industry, traditional assembly methods can
hardly meet the needs of large-scale production, especially in the
field of high-precision assembly. Robot assembly guided by visual
perception has become the key of the research in the field of
engineering technology. It requires higher accuracy of robot visual
perception and the control over force, position and so on. However, in
3C assembly, most products are made of transparent materials such as
glass. Because of the transparency and specular reflection of the
surface, 3D reconstruction of transparent objects is a very difficult
problem in computer vision, in that the traditional visual perception
methods could not be accurate enough. The present research proposes a
bionic active sensing algorithm for 3D perception and reconstruction
and realizes high-precision 3D by applying the registration algorithm.
The purpose is to solve the problems existing in the traditional
visual perception method, such as difficulties in achieving active
sensing, low accuracy of point clouds registration, and complex
computation. The results of the experiments show that the present
method is efficient and accurate in 3D reconstruction. It reduces the
planar reconstruction error to 0.064 mm and the surface reconstruction
error to 0.177 mm.
EXPLORING LANGUAGE AS THE TOOL FOR RELIGIOUS LEADERS IN COUNTERING RADICALISATION AND RELIGIOUS EXTREMISM AMONG THE YOUTH IN EASTLEIGH, NAIROBI COUNTY
Authors: SHONHAYI GIVEMORE 
Published: January 2020

The gist of this study was to explore language as a tool for religious leaders in preventing and countering radicalisation and religious extremism among the youth. This study emphasised on language an indispensable tool that religious leaders can use in curbing this recruitment which has claimed lives and has had economic repercussions. The study specifically assessed the collaboration between the Government of Kenya (GoK) and religious leaders in Eastleigh towards countering radicalisation and religious extremism among the youth and it proposes a common discourse that religious leaders could use in preventing radicalisation and religious extremism of the youth. The study was anchored by the Social Movement Theory (SMT). The target population comprised of the religious leaders, security operatives and youths in Eastleigh. The study implored simple random sampling technique. In total a sample of 100 respondents were randomly selected from the study site. The researchers collected primary data from the respondents by administering questionnaires (to the youth) and interview schedules on religious leaders and the security personnel. The data was analysed using quantitative and qualitative techniques. Quantitative data was analysed using Statistical Package for Social Sciences (SPSS) version 23 program while qualitative was analysed through narrative descriptions. The study findings established that among many other tools and means, language is key in curbing youth radicalisation and religious extremism. It also revealed that the Government of Kenya should directly engage the religious leaders on matters prevention of youth radicalization and religious extremism. The youth bemoaned lack of employment and political participation as the factors that pull them to radicalisation and religious extremism. They also want to be fully engaged in occasions where language is used between the GoK and Religious leaders.
Cywilnoprawna problematyka wykorzystania gry komputerowej jako narzędzia promocji: in-game advertising oraz advergaming
Authors: Szpyt Kamil 
Published: January 2020

W artykule omówiono dwa zjawiska charakterystyczne dla wykorzystania gry komputerowej jako narzędzia promocji: in-game advertising i advergaming. Rozpoczęto od zaprezentowania kontekstu historycznego oraz społecznego zjawiska, jak również przedstawienia niezbędnych definicji. Następnie przeanalizowano obowiązek zastosowania wobec gier komputerowych przepisów regulujących reklamę zawartych w najistotniejszych aktach prawnych. Wywody te uzupełniono rozważaniami na temat kwestii reklamowania wirtualnych produktów, które nie mają realnych odpowiedników. W dalszej kolejności przyjrzano się zjawisku możliwości dochodzenia przez reklamodawcę odszkodowania z tytułu wadliwej reklamy, jak również możliwości naruszenia dóbr osobistych twórców gry z powodu wprowadzenia do niej reklamy lub lokowania produktu przez wydawcę bez ich wiedzy i zgody.
The Dual Baer Criterion for non-perfect rings
Authors: Trlifaj Jan 
Published: January 2020

Abstract
Baer’s Criterion for Injectivity is a useful tool of the theory of modules.
Its dual version (DBC) is known to hold for all right perfect rings, but its validity for the non-right perfect ones is a complex problem (first formulated by C. Faith
[Algebra. II. Ring Theory,
Springer, Berlin, 1976]).
Recently, it has turned out that there are two classes of non-right perfect rings:
(1) those for which DBC fails in ZFC, and
(2) those for which DBC is independent of ZFC.
First examples of rings in the latter class were constructed in
[J. Trlifaj,
Faith’s problem on R-projectivity is undecidable,
Proc. Amer. Math. Soc. 147 2019, 2, 497–504];
here, we show that this class contains all small semiartinian von Neumann regular rings with primitive factors artinian.
Recovery of non-smooth radiative coefficient from nonlocal observation by diffusion system
Authors: Zhang Mengmeng , Liu Jijun 
Published: January 2020

Abstract
The heat conduction process in composite medium can be modeled by a parabolic equation with discontinuous radiative coefficient.
To detect the composite medium characterized by such a non-smooth coefficient from measurable information about the heat distribution, we consider a nonlinear inverse problem for parabolic equation, with the average measurement of temperature field in some time interval as the inversion input.
We firstly establish the uniqueness for this nonlinear inverse problem, based on the property of the direct problem and the known uniqueness result for linear inverse source problem.
To solve the inverse problem from a nonlinear operator equation, the differentiability and the tangential condition of this nonlinear map is analyzed.
An iterative process called two-point gradient method is proposed by minimizing data-fit term and the penalty term alternatively, with rigorous convergence analysis in terms of the tangential condition.
Numerical simulations are presented to illustrate the effectiveness of the proposed method.
Kinetics and thermodynamics of the hydroxylation products in the photodegradation of the herbicide Metolachlor
Authors: Salta Zoi , Kosmas Agnie M. , Ventura Oscar N. 
Published: January 2020

Abstract
Electronic structure calculations have been performed to determine the thermochemistry and kinetics of the reaction between OH and the radicals of the S enantiomer of the herbicide Metolachlor, 2-chloro-N-(2-methyl-6-ethylphenyl)-N(2-methoxy-1-methylethyl) acetamide (MC), produced by photoinduced breaking of the C–Cl bond. Both density functional and ab initio composite methods were employed to calculate the structure of reactants, intermediates, transition states and products, in gas phase and in aqueous solution. The expected relative abundance of each product was calculated and compared to the experimentally observed concentrations. It is shown that a combination of thermodynamic and kinetic characteristics interplay to produce the expected theoretical abundances, which turn out to be in agreement with the experimentally observed distribution of products.
Comparative Surface Morphology of Machined Hybrid and Unhybrid Zinc-Aluminum Alloy-Based Metal Matrix Composites
Authors: Marigoudar Rajaneesh N. 
Published: January 2020

Abstract
The present article reveals the surface characteristics of zinc-aluminum alloy (ZA43) reinforced with silicon carbide (SiC) particulate conventional composite and SiC+Graphite dual reinforced hybrid metal matrix composites. Both the composites were prepared using a liquid metallurgy technique. A base alloy of metal matrix composites (MMC) containing zinc—57 %, aluminum—43 % was reinforced with SiC (5 %) with an average particle size of 60 μm and hybrid composite with 5 % SiC and 5 % graphite. The coated carbide tool SNMG was used to machine the two varieties of composites under dry condition. Machining parameters were considered at three different levels, keeping a constant depth of cut. It was observed from the results that the surface finish was greatly influenced by cutting speed and feed. Unhybridized composites exhibit (without graphite) higher roughness values than composites with graphite during the machining trials. The reasons for higher roughness values include particle pullout, particle fracture, and built-up edge formation on the cutting tool during the machining process.
AVALIAÇÃO DA QUALIDADE BIOLÓGICA, MICROBIOLÓGICA E POR METAIS PESADOS DAS ÁGUAS DOS PRINCIPAIS RESERVATÓRIOS DO RIO GRANDE DO NORTE
Authors: Grilo Junior José Américo 
Published: January 2020

O presente trabalho tem por objetivo avaliar a qualidade das águas dos principais reservatórios de abastecimento público no estado do Rio Grande do Norte. As coletas foram realizadas em pontos pré-estabelecidos nos açude em estudo em cinco semanas consecutivas. Foram analisados os aspectos biológicos, microbiológicos e por metais pesados dos principais reservatórios de água de Rio Grande do Norte (RN). condições de balneabilidade dos reservatórios. O estudo identificou como sendo de boa qualidade para maioria dos açudes estudados e de ótima qualidade somente para Boqueirão-Parelhas. Verificou-se que a quantificação de densidade de Cianobactérias nos corpos d’água de Lucrécia, Armando Ribeiro, de Pau dos Ferros, Passagem das Traíras e Gargalheiras estavam superiores ao permitido pela legislação indicando processo de eutrofização, podendo causar problema a saúde humana e aos animais. Em relação aos níveis de metais pesados, todos apresentaram algum metal acima do limite permitido, porém todos apresentaram valor acima do limite para o cádmio, a Barragem de Santa Cruz apresentou menor quantidade de matais. A avaliação da Balneabilidade constatou que as barragens de Pau dos Ferros e Santa Cruz foram classificadas como impróprio para a atividade de recreação de contato primário, enquanto que os demais pontos foram enquadrados como excelente. A maioria das águas dos reservatórios estudados está inadequada para dessedentação de animais.
UM ESTUDO DE CASO COM ESTUDANTES EM CURSO FIC PRONATEC ENVOLVENDO CONHECIMENTOS SOBRE PROBLEMAS SOCIAIS E AMBIENTAIS
Authors: Pouey João Franciso Fernandes , Laroque Luís Fernando da Silva 
Published: January 2020

As políticas públicas para a formação profissional tiveram significativo investimento no primeiro governo Dilma no Brasil e o Programa Nacional de Acesso ao Ensino Técnico e Emprego (Pronatec), alcançou a meta de oito milhões de matriculas em cursos técnicos de grau médio ou de formação inicial e continuada (FIC). O objetivo do estudo é identificar se a capacitação técnica dos cursos FIC foi desenvolvida juntamente com a formação social e política dos estudantes com vista aos conhecimentos dos problemas sociais e ambientais. A pesquisa é qualiquantitativa e os procedimentos metodológicos constitui-se na aplicação de questionários em uma amostragem com 10 estudantes do curso de capacitação ou FIC do Pronatec - área da construção civil de Mestre de Obras no Instituto Federal Sul-rio-grandense (IFSul), câmpus Pelotas, Rio Grande do Sul. Consultou-se documentos, tais como Projeto Político Pedagógico, matriz curricular, conteúdos programáticos e a legislação sobre o Pronatec, os quais foram analisados com base em autores que tratam da educação profissional, educação ambiental e construção civil e ambiente. Constatou-se que o curso propicia pouca quantidade de conhecimento sobre a problemática ambiental e fazem parte dos conteúdos somente de uma disciplina, enquanto deveriam ser trabalhados de maneira transversal.
INSERÇÃO DO ASSISTENTE SOCIAL NA POLÍTICA PÚBLICA DE SAÚDE: ABORDAGENS E PERSPECTIVAS
Authors: Guerra Lenin Cavalcanti Brito , Aquino Veronica Maria 
Published: January 2020

O presente artigo discute a inserção dos assistentes sociais na política pública de saúde sob a perspectiva da ampliação dos direitos sociais, uma vez que estes profissionais trabalham na prevenção, promoção da saúde e na constante busca por melhorias no sistema público de saúde no tocante ao acesso e ampliação dos direitos à saúde. Posto isso, temos como objetivo geral: analisar como se deu inserção dos Assistentes Sociais na saúde no marco do Movimento da Reforma Sanitária até a chegada do Neoliberalismo nos anos de 1990. Na revisão de literatura foram estudados autores que discutem a temática Serviço Social e Saúde como: Bravo (2006), Código de Ética do/a Assistente Social (1993), Minayo (1994) e Parâmetros para atuação de Assistentes Sociais na Política de Saúde (2013), CFESS (1999) além da revisão documental das legislações referentes à saúde, tais como a Constituição Federal da República Federativa do Brasil (1988) e a Lei nº 8.080. Foi utilizada uma abordagem qualitativa a partir do método das narrativas, o qual irá abordar os principais marcos históricos que personalizam a inserção dos assistentes sociais na saúde, enfatizando principalmente a reforma sanitária, Resolução do CFESS e a chegada do Neoliberalismo.
IDEAÇÃO E TENTATIVA DE SUICÍDIO EM ESTUDANTES DE PSICOLOGIA: UMA DOR QUE TEM MORADA NA UNIVERSIDADE
Authors: Azevedo Ana Karina Silva , Silva Maria Vanessa Morais da , Lima Airllanne Palloma da Silva 
Published: January 2020

A Organização Mundial da Saúde estima que mais de 800 mil pessoas morrem devido ao suicídio todos os anos, entretanto, apesar desse expressivo índice, ainda é um assunto tabu e carente de discussão em diferentes esferas, como: a escola, a mídia e, fundamentalmente, nos currículos e formação de profissionais de saúde, incluindo a Psicologia. Este trabalho é fruto de uma pesquisa qualitativa que entrevistou estudantes do curso de psicologia da FACISA-UFRN e tem como objetivo compreender aspectos relacionados a ideações e tentativas de suicídio, presentes na história de vida desses estudantes. Em nossa pesquisa foram utilizados questionários semiestruturados, os quais foram analisados em dois momentos: as perguntas fechadas foram submetidas a tratamento estatístico simples e as perguntas abertas foram analisadas a partir do discurso dos participantes à luz da fenomenologia existencial, embasando-nos para nossa análise em autores dessa perspectiva que já trabalham o tema do suicídio. Participaram do estudo 63 estudantes do 1º e 3º períodos de Psicologia. Pudemos constatar a tentativa de suicídio presente em 11,50%, e no que se refere a ideação suicida, emerge um quantitativo de 47,22% da amostra. Percebemos que o suicídio aparece como sofrimento, desespero, fuga, angústia e, sobretudo, como escolha existencial. A possibilidade de suicidar-se surge de maneira multifacetada, estando correlacionada com várias outras questões, inclusive com o fazer profissional dos estudantes e futuros psicólogos. Existe um sofrimento evidente relacionado a temática do suicídio, sendo necessário pensar em ações que contribuam para abordar tal fenômeno entre os universitários, e também para além disso, pensar a necessidade de termos mais estudos na área, propiciando compreensões sobre o fenômeno do suicídio.
Application of Expectation-Maximization (EM) Algorithm in Grouping Popularity Tourism Objects in Malang Raya Based on Indicator of Many Visitors
Authors: Atikah Nur 
Published: January 2020

Malang Metropolitan Area is one of the areas in East Java which is a leading tourism destination in Indonesia with Batu Tourism City (Kota Wisata Batu) as the center. Considering the development of tourism in Malang, it is necessary to do a grouping of the popularity of tourism objects so that it can be used as a reference for making policy by the tourism department and tourism management. In this article, the grouping is analyzed by using the method of grouping the Expectation Maximation (EM) algorithm. The data used is secondary data obtained from BPS data, namely data of many tourism visitors in Malang Raya. The results of the grouping the popularity of leading tourism objects in Malang are based on indicators of the number of visitors divided into five groups, there are Group 1: Selecta; Group 2: Balekambang, Pemandian Wendit and Wisata Oleh-Oleh Brawijaya; Group3: Museum Angkut, Coban Rondo, Museum Satwa, Jatim Park, BNS, Petik Apel “Makmur Abadi and Agro Kebun Teh Wonosari; Group 4: Kusuma Agro Wisata, Kampoeng Kidz, Air Panas Cangar, Eco Green Park, Predator Fun Park, Wana Wisata Coban Rais, Gunung Banyak, Mahajaya T-Shirt & Oleh-oleh, Ngliyep and Bendungan Selorejo; Group 5: Vihara “Dammadhipa Arama”, Rafting “Kaliwatu”, Batu Rafting, Wana Wisata Coban Talun, Pemandian Tirta Nirwana, Pemandian Air Panas Alam Songgoriti, Wonderland Waterpark, Sahabat Air Rafting, Petik Apel Mandiri, Batu Agro Apel, Kampung Wisata.