bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effectiveness of “River Chief System” Policy: An Empirical Study Based on Environmental Monitoring Samples of China
Authors: Li Wanhua , Zhou Yaodong , Deng Zhijia
Published: July 2021

There has been controversy in theory and practice among studies about the governance of the “River Chief System” (RCS) policy and the watershed management issues behind it. This paper uses the regression discontinuity (RD) method and the water pollution monitoring data of 150 state-controlled monitoring points in China from 2007 to 2018 at the China National Environmental Monitoring Station to empirically study the effect of the “River Chief System” on water pollution treatment and the influencing factors behind the effect of the “River Chief System”. The results show that the “River Chief System” policy has a positive impact on river pollution treatment in the observation term. The implementation effectiveness of the “River Chief System” is limited by factors such as the boundaries of the river chief’s jurisdictions, the administrative conflict among river chiefs, local government environmental expenditure capacity, and environmental pressure. It is believed that the key to basin governance is to further improve the synergistic model of basin governance among regions.
Studying Satisfaction with the Restriction Measures Implemented in Greece during the First COVID-19 Pandemic Wave
Authors: Zavras Dimitris
Published: July 2021

There is an ongoing debate regarding the effectiveness of policy responses to the coronavirus disease 2019 (COVID-19) pandemic. As satisfaction with such measures is a function of their effectiveness, the main objective of this study was to identify the factors driving satisfaction with the measures implemented in Greece during the first pandemic wave. The study used data from the first round of the “Public Opinion in the European Union (EU) in Time of Coronavirus Crisis” survey. The sample consisted of 1050 individuals aged between 16 and 54 years. The results of the analysis, which was based on an adjacent category logistic model, indicate that materially deprived individuals were less likely to be satisfied with the restriction measures, while those considering that the health benefits were greater than the economic damage, those concerned for their own health and those concerned for the health of their family and friends were more likely to be satisfied with the restriction measures. The results confirm the existence of uncertainty regarding the effectiveness and impacts of the restriction measures.
Labour law aspects of organization of distance education in universities
Authors: Voronina A. A.
Published: July 2021

The article considers changes in the organization of the educational process in universities in Russia in connection with the pandemic, an attempt was made to analyze changes in the performance by university teachers of labor functions in the conditions of the transition of universities to distance learning. Peculiarities of working time regime, requirements for teachers in changed conditions, as well as a number of problematic aspects related to work in information and educational environment are considered.
Unprepared and unprotected: Graduating medical students’ knowledge, attitudes, and practices regarding drug-resistant tuberculosis in Cape Town, South Africa
Authors: Harrison Michael J. , Watts Jonathan , Rosslee Michael-Jon , von Delft Arne , van der Westhuizen Helene-Mari
Published: July 2021

South Africa has a high burden of drug-resistant tuberculosis (DR-TB), which has a particularly high mortality among healthcare workers. Junior clinicians deliver key DR-TB services and require training in DR-TB management and prevention. This study aimed to investigate graduating medical students’ knowledge, attitudes, and practices relating to DR-TB, including management, infection control measures, and occupational health services. This cross-sectional, questionnaire-based study at the University of Cape Town, South Africa, recruited final year medical students and included 87 participants. The mean DR-TB knowledge score was 4.7 points (95% confidence interval [CI]: 4.42–5.06, maximum score 8 points). Students reported challenges in accessing respiratory protection, with half (47.7%) struggling to find an N95 respirator when needed. DR-TB exposure was reportedly common. Three students reported prior TB disease, approximately half (n = 49, 55.9%) reported personal concern of active DR-TB disease during undergraduate studies, and the majority (n = 80, 91.9%) correctly perceived themselves to be at increased risk compared to the general population. Medical students are currently unprepared for their role in managing DR-TB in South Africa and unprotected against occupational illness during their studies. This should be addressed in undergraduate curricula and in establishing comprehensive occupational health policies. Resilient personal protective equipment (PPE) supply chains, infection control training, and comprehensive occupational health support have relevance to both DR-TB and novel pathogens, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
Análisis del turismo sostenible en la provincia de Utcubamba, Amazonas-Perú
Authors: Llanos Flores Jhesica , Menacho Carhuamaca Jaime David , Cerrón Alcocer Melissa Esther
Published: July 2021

El presente estudio se realizó con el objetivo de analizar la importancia del desarrollo del turismo sostenible en la provincia de Utcubamba del departamento de Amazonas, Perú. La metodología se fundamentó en un sintagma holístico de enfoque mixto, para la muestra participaron cuarenta turistas que visitaron la provincia. Para el análisis cuantitativo, se planteó una encuesta destinada a turistas entre los dieciocho y cincuenta años de edad. Los resultados, se expusieron en el diagrama de Pareto, manifestando tres problemas críticos, como primer problema se encontró insuficientes guías oficiales de turismo especializados para realizar las actividades turísticas en la zona, así mismo se percibió como segundo problema la insatisfacción por parte de los visitantes debido a la poca información turística que recibieron y finalmente como tercer problema se detectó que los establecimientos los cuales son parte del mercado turístico de la provincia ofrecen un servicio deficiente de calidad de atención hacia los turistas. En el caso del análisis cualitativo se efectuaron entrevistas a personas que trabajan en el sector agropecuario y en el área de turismo de Utcubamba, donde se obtuvo como resultado deficiencia de promoción turística sobre las actividades y visitas que se pueden realizar pero no se han efectuado a falta de puesta en valor y preservación de los recursos naturales y culturales de la provincia, carencia de seguridad turística y además escaso reconocimiento por los pobladores de los recursos turísticos e identidad cultural. Se plantearon estrategias para incentivar al desarrollo del turismo sostenible con el fin de alcanzar efectos positivos en la calidad de vida de los pobladores que logre ser sustentable a largo plazo mediante la protección de la identidad cultural de la comunidad y promoviendo el desarrollo de un turismo responsable.
Entrevista com Andrew Pinsent
Authors: Pinsent Andrew
Published: July 2021

Interview with Andrew Pinsent, Director of the Ian Ramsey Centre for Science and Religion, University of Oxford.
Financial Twitter Sentiment on Bitcoin Return and High-Frequency Volatility
Authors: Gao Xiang , Huang Weige , Wang Hua
Published: July 2021

This paper studies how sentiment affect Bitcoin pricing by examining, at an hourly frequency, the linkage between sentiment of finance-related Twitter messages and return as well as the volatility of Bitcoin as a financial asset. On the one hand, there was calculated the return from minute-level Bitcoin exchange quotes and use of both rolling variance and high-minus-low price to proxy for Bitcoin volatility per each trading hour. On the other hand, the mood signals from tweets were extracted based on a list of positive, negative, and uncertain words according to the Loughran-McDonald finance-specific dictionary. These signals were translated by categorizing each tweet into one of three sentiments, namely, bullish, bearish, and null. Then the total number of tweets were adopted in each category over one hour and their differences as potential Bitcoin price predictors. The empirical results indicate that after controlling a list of lagged returns and volatilities, stronger bullish sentiment significantly foreshadows higher Bitcoin return and volatility over the time range of 24 hours. While bearish and neutral financial Twitter sentiments have no such consistent performance, the difference between bullish and bearish ratings can improve prediction consistency. Overall, this research results add to the growing Bitcoin literature by demonstrating that the Bitcoin pricing mechanism can be partially revealed by the momentum on sentiment in social media networks, justifying a sentimental appetite for cryptocurrency investment.
Zonas de espera
Authors: Arantes Paulo Eduardo
Published: July 2021

Uma tremenda mutação temporal virou de ponta cabeça o mundo que o capitalismo vencedor está reorganizando e governando. Mutação cuja fratura exposta se encontra justamente na virada punitiva operada pelo estado bifurcado estudado por Loïc Wacquant. São duas esperas: uma disciplinadora da insegurança social alimentada pela inquietação do trabalho desqualificado; outra envenenando a euforia perpétua das novas classes confortáveis que o capital costuma acariciar com uma mão e infernizar com uma outra. A forma predominante de intervenção em nome da ordem que a guerra contemporânea assumiu é tributária de uma virada punitiva onde a desmedida reina, da estratégia de Choque e Pavor ao desenho do arsenal cirúrgico concebido para gravar a memória perene da dor na mente de seus alvos preferenciais, novamente disseminados pelas populações liminares do mundo-fronteira contemporâneo, entendendo-se por fronteira toda sorte de barreira por cuja terra de ninguém (social, econômica, simbólica, etc.) campeia o peso morto do poder punitivo despertado de sua sonolência social pelos novos Estados do Workfare.
Publicado originalmente em 2012 como capítulo em Vera Malaguti Batista (Org.). Loïc Wacquant e a questão penal no capitalismo neoliberal. Rio de Janeiro: Revan, p. 229-280; e posteriormente como capítulo em Paulo Arantes. O novo tempo do mundo. São Paulo: Boitempo, 2014, p.141-198.
Palavras-chave: Estado de Exceção, Loïc Wacquant, Giorgio Agamben, Trabalho, Encarceramento, Refugiados, Geopolítica, Contemporaneidade, Capitalismo, Horizonte de espera, Ernst Bloch, Territórios ocupados, Palestina.
Sentimento da dialética na experiência intelectual brasileira
Authors: Arantes Paulo Eduardo
Published: July 2021

Quais os pressupostos de uma crítica literária verdadeiramente dialética? Esta a questão que Paulo Arantes busca responder neste livro, publicado em 1992, que analisa a obra de dois dos mais importantes críticos brasileiros: Antonio Candido e Roberto Schwarz. O interesse ultrapassa de muito o âmbito literário. O autor contextualiza o ensaísmo de ambos, discute as teorias explicativas da realidade brasileira que se desenvolviam paralelamente a ele e mostra como, em suas obras mais características, Antonio Candido e Roberto Schwarz atinaram com uma homologia estrutural entre a obra literária e a organização social cheia de consequências para o estuda da cultura de um país periférico. Como escreve o autor: “pela primeira vez a crítica da cultura, instruída pela revisão das implicações de uma sociedade dual, examinava no seu conjunto os efeitos artístico-ideológicos do desenvolvimento desigual e combinado do capitalismo”.
Bento Prado Jr., em resenha, publicada aqui como posfácio, afirma que “com Sentimento da Dialética, de Paulo Arantes, não ganhamos apenas um grande acerto na reflexão sobre a historiografia literária no Brasil. Muito mais do que isso (que não é pouco) é a própria filosofia brasileira que sai dos limites estreitos de seus seminários mais ou menos ‘técnicos’ (pois ignora-se, normalmente, que a essência das ‘técnicas’ filosóficas jamais é, ela própria, técnica), para mergulhar na ‘experiência’ e no próprio Brasil”.
 
Palavras-chave: Antonio Candido, Roberto Schwarz, formação, dialética, dualidade, dualismo, marxismo, literatura brasileira, crítica literária, Brasil, consciência nacional, sistema colonial, escravidão, malandragem, Crítica da cultura, subdesenvolvimento, dependência, periferia, Machado de Assis, Aluísio Azevedo, Maria Sylvia de Carvalho Franco, Caio Prado Jr., Florestan Fernandes, Fernando Novais, USP, uspiano.
The Neo-Enlightenment Aesthetics of Jürgen Habermas
Authors: Fiori Arantes Otília Beatriz , Arantes Paulo Eduardo
Published: July 2021

This essay was prepared especially for the issue 49 of Cultural Critique (2001) as an extract of the argument presented in Otília and Paulo Arantes’ book Um Ponto Cego no Projeto Moderno de Jürgen Habermas (A blind spot in Jürgen Habermas’ Modern Project, 1992) (which remain untranslated into English). While Habermas has seldom addressed the question of aesthetic directly, here the authors reconstruct why architecture becomes the aesthetic side of predilection for him. What the authors call a “neo-Enlightenment aesthetics” in Habermas involves a reconfiguration of the judgement of taste, as conceived in the Enlightenment, but now projected through the lens of communicative action where the rules of engagement have left the spectacle behind. A Kantian aesthetic with airs of Benjamin and Brecht, they contend, became the ingredients which Habermas tried to get beyond the impasse that Peter Bürger had already pointed out with regard to idealist aesthetics, namely how the process of the autonomization of art is simultaneously a process both of its consolidation and its eventual demise. How then to talk about aesthetics after Avant-Garde? For Habermas, architecture becomes a place of encounter for his own ideas about the public sphere, rational engagement, and aesthetic engagement.
The Arantes, however, contest Habermas’ abstract defense of Modern Architecture by showing how, in the word and specially in Brazil, each phase of its development is intimately tied to specific moments in capitalism development. They follow in Adorno’s footsteps in arguing that the site of Modern Architecture in Brazil is a cipher of glass and concrete that evinces the silence of the spellbound rather than the emergence of a public genre with enlightenment functions.
(Sílvia Lopes)
 
Keywords: Habermas, Modernity, Modern Design, Modern Movement, Postmodernism, Ideology, History, Benjamin, Utopia, Communicative Action, Linguistic Turn, Enlightenment, Reason, Critical Theory, Welfare, Brazil.
Mário Pedrosa
Authors: Fiori Arantes Otília Beatriz
Published: July 2021

Neste livro, Otília reconstitui as grandes linhas de uma trajetória, nada linear, de um dos maiores críticos de arte do Brasil e que acompanhou de perto, ao longo de quase todo o século XX, as idas e vindas da arte internacional. Mário Pedrosa, sem nunca abandonar a militância política, jamais dissociará revolução social e arte a mais avançada, ou arte independente – o que nem sempre interpretou da mesma maneira.  Ou seja, apesar de suas reticências iniciais em relação àquela arte moderna que na conferência de 1933, sobre Käthe Kollwitz, identificava como “um jogo pueril de formas”, aos poucos, como político e como revolucionário, foi se dando conta do quanto a luta pela libertação da humanidade passa pela preservação e ampliação daquele mínimo de iniciativa de que ela pode dispor na sociedade capitalista e, portanto, a olhar com outros olhos a arte burguesa e a tentar adivinhar aí a convergência, embora incipiente, entre uma arte que chamou de hermética, confinada na aparência estética, e aquela que ia buscar sua inspiração na “dramática fermentação” da sociedade. Em seu retorno do exílio, em 1945, embora já afastado do trotskismo, mantinha-se fiel à máxima do Manifesto por uma arte independente – “A independência da arte para a revolução e a revolução para a independência da arte” –, encetando uma batalha sem trégua para que o Brasil saísse do isolamento e se alinhasse à arte mais avançada da época. Não há dúvida que esbarrava nos impasses característicos de um país periférico, onde falar de independência artística é algo no mínimo problemático, mas o sopro de ar novo que trouxe obrigou nossos artistas e críticos a porem em discussão o rumo que a arte, em nítido refluxo em relação às conquistas vanguardistas, ia tomando entre nós. Em defesa da arte abstrata, alegava estar ela elaborando os símbolos de uma linguagem plástica inédita, destinada a nos arrancar da atonia perceptiva quotidiana, na esperança de encurtar a distância que nos separa dos “horizontes longínquos da utopia”.  O ápice de uma tal empreitada seria Brasília – a grande síntese anunciada pelas vanguardas e reativada pelo projeto construtivo abstrato – cujo feito não apenas registraria, mas defenderia ardorosamente, tendo inclusive promovido um encontro internacional de críticos de arte, em 1959, sob o título “Brasília, síntese das artes”.
Originalmente publicado em 1991, por ocasião dos 10 anos de morte de Mário Pedrosa, republicado em 2004, foi acrescentado o texto “Atualidade de Mário Pedrosa”, escrito por ocasião de seu centenário, situando-o na grande linhagem crítica brasileira. Mantivemos aqui integralmente esta última edição.
Palavras-chave: Mário Pedrosa, Crítica de arte, Arte proletária, Arte abstrata, Concretismo, Neoconcretismo, Gestalt, Pós-Modernismo, Arquitetura Brasileira, Brasília, Bienais
Depois de junho a paz será total
Authors: Arantes Paulo Eduardo
Published: July 2021

Depois de junho a paz será total é o título irônico do tour de force que encerra a nossa viagem e que procura dar conta do vínculo entre pacificação e insurgência. Pulverizando os clichês propagados à direita e à esquerda – “baderna” de rua protagonizada por vândalos a serem devidamente dedetizados pelas forças da ordem, ou esquerdismo infantil de uma juventude desorganizada, sem direção e que, portanto, dará em nada –, Paulo Arantes vai rastreando, na literatura recente sobre as classes populares urbanas no Brasil e em publicações de protagonistas dos eventos, ideias que lhe permitam construir hipóteses sobre a genealogia dos acontecimentos de junho de 2013. Dessa maneira, leva a cabo a interpretação mais original desses eventos realizada até agora. Se pusermos na panela de pressão brasileira os seguintes ingredientes, quase todos indigestos: o Programa de Pacificação das Favelas no Rio de Janeiro com suas UPPs, na verdade uma estratégia de guerra; a violência policial contra os moradores das periferias urbanas; as remoções forçadas exigidas pelos megaeventos; as políticas públicas que, ao incitar o empreendedorismo dos pobres, se, por um lado, canalizam sua energia para uma atividade governável, por outro, criam um sedimento reivindicativo à espreita para explodir; as lutas pela cidade, levadas a cabo por uma geração de “cidadãos insurgentes” exigindo a democratização do solo urbano; a “agonia do trabalho descartável, mostrando que o capitalismo como religião em sua forma contemporânea tornou-se um espantoso e interminável ‘ritual de sofrimento’”; as revoltas populares pelo transporte público; a síndrome da participação cidadã sem poder, etc. – todos temas analisados pelo Autor –, desconfiamos que esse conjunto de fenômenos faz sistema e explica, quem sabe, a “nova insurgência profanatória” que explodiu nas ruas em junho. (...) Encarar esse estado de coisas e dar um passo adiante é a tarefa da nova geração, que abriu uma porta em junho de 2013.
(Excerto da Nota introdutória de Isabel Loureiro)
Acompanha o livro, o link para a Aula Pública: Tarifa zero e mobilização popular, ocorrida no calor dos acontecimentos, em 27 de junho  de 2013, a convite do Movimento Passe Livre (MPL), defronte à sede da Prefeitura de São Paulo. A transcrição resumida da aula está incluída no Ebook. 
 
Palavras-chave: Junho de 2013, manifestações, insurgência, revolta, pacificação, juventude, classes populares, trabalhadores, cidades, trabalho, sofrimento social, transportes, MPL, anticapitalismo, neoliberalismo, democracia, controle social, recusa, utopia, tempo presente.
MANAGEMENT OF THE TRAINING SIMULATOR OF SPECIAL-PURPOSE ZONAL DATA NETWORKS
Authors: БАСАРАБ М.А. , БЕЛЬФЕР Р.А. , КРАВЦОВ А.В.
Published: July 2021

Представлены процедуры выполнения одних из основных функций централизованного управления учебным имитатором сети передачи данных категории специального назначения: маршрутизации, информационной безопасности и управления неисправностями. Процедуры рассматриваются на примере конфигурации имитатора сети, представляющей собой часть сети передачи данных специального назначения страны (нижний уровень, зоновые сети). Показана возможность упростить решение задачи управления имитатором зоновой сети передачи данных категории специального назначения в сравнении с управлением сетями связи с помощью TMN и управлением виртуальной частной маршрутизируемой сетью ( VPRN) благодаря использованию принудительной маршрутизации («от источника»). Результаты работы планируется использовать для решения задачи управления имитатором сети, представляющей собой полную конфигурацию всей сети передачи данных страны, частью которой являются зоновые сети.

The procedures for performing the main functions of centralized control of a training simulator of a special-purpose data transmission network (routing, information security, and fault management) are proposed. The procedures are discussed using an example of the configuration of a network simulator representing part of a country's special-purpose data network (lower level, zonal networks). It is shown that it is possible to simplify the solution of the complex task of managing a special-purpose data transmission network simulator in comparison with the management of communication networks using Telecommunication Management Network (TMN) and management of virtual private routed network, using forced routing “from the source”. The results of this work will be used to solve the problem of managing a network simulator, which is a complete configuration of the entire data network of a country.
Los desafíos del crecimiento partidario. El PRO y la penetración territorial en Quilmes
Authors: Gené Mariana , Longa Francisco
Published: July 2021

Uno de los retos más importantes que enfrentó Propuesta Republicana (PRO) tras su exitoso desarrollo en la Ciudad de Buenos Aires fue su nacionalización. Al tratarse de un partido que forjó una fuerte “marca partidaria”, resulta relevante analizar qué desafíos enfrentó en su expansión a nuevos distritos. ¿Cuál fue la estrategia privilegiada para lograr cobertura nacional y qué contratiempos encontró ese proceso? ¿Qué tipo de cuadros reclutó y qué dinámica organizacional existió entre ellos? Este artículo analiza los inicios y el desarrollo del PRO en el partido de Quilmes, provincia de Buenos Aires, dando cuenta de las tres vertientes que lo nutrieron desde 2007 y de su lento crecimiento hasta llegar a ocupar la intendencia en 2015 de la mano de un outsider. Basado en trabajo de archivo, entrevistas en profundidad con funcionarios y revisión de la literatura especializada, el artículo muestra la estrategia de “penetración territorial” privilegiada por el centro partidario y las tensiones y acuerdos que esta supuso con los actores locales.
Criminal-Legal Characteristics of Encroachment on the Health, Personal Integrity, Honor and Dignity of a Representative of the Authorities
Authors: Borzunova N. Yu. , Matorina O. S. , Letunova E. P.
Published: July 2021

The authors of the article consider the criminal- legal characteristics of crimes against representatives of the authorities, in particular, encroachment with the purpose of causing harm to the health, personal integrity, honor and dignity of a representative of the authorities. The definition of the term “representative of the authorities”is given. The main characteristics of a representative of the government are analyzed. Statistical data on the number of convictions and types of punishments in accordance with the provisions of articles of the Criminal Code of the Russian Federation (Articles 318, 319) are summarized. Examples of judicial practice are considered. The ways of improving the criminal legislation are proposed.
Misinformation e debunking: abbiamo i mezzi per tradurli
Authors: Lombardi Vallauri Edoardo
Published: July 2021

Un lettore chiede quale sia il modo migliore per tradurre l’inglese misinformation, tenendolo distinto da disinformation, e se sia il caso di tradurre debunking o sia meglio conservarlo tale e quale.
Tipos de cambio flotantes y desliz cambiario: Las experiencias de algunos países en desarrollo
Authors: Ortiz Martínez Guillermo , Solís Leopoldo
Published: July 2021

Experiencia que en materia cambiaria han tenido recientemente algunos países en desarrollo.
Ajuste estacional de una serie de tiempo mediante el uso complementario de métodos tradicionales y la técnica de Box-Jenkins
Authors: Guerrero Víctor M. , Vera y Ferrer Gabriel
Published: July 2021

El objetivo de este trabajo es determinar si, como se cree, la serie del financiamiento total otorgado por el sistema bancario, depende de factores estacionales mensuales.
It may be time to improve the neuron of artificial neural network
Authors: Liu Gang
Published: July 2021

Artificial neural networks (ANNs) have won
numerous contests in pattern recognition, machine learning, or artificial
intelligence in recent years. The neuron
of ANNs was designed by the stereotypical knowledge of biological neurons 70
years ago. Artificial Neuron is expressed as f(wx+b) or f(WX). This design
does not consider dendrites' information processing capacity. However, some recent studies show that biological dendrites participate in the
pre-calculation of input data. Concretely, biological dendrites play a role in
extracting the interaction information among inputs (features). Therefore, it
may be time to improve the neuron of ANNs. According to our previous studies
(DD), this paper adds the dendrites' function to artificial Neuron. The
dendrite function can be expressed as Wi,i-1Ai-1 ○ A0|1|2|...|i-1 . The generalized new neuron can be expressed as f(W(Wi,i-1Ai-1 ○
A0|1|2|...|i-1)).The simplified new neuron
be expressed as f(∑(WA ○ X)). After improving the neuron, there
are so many networks to try. This paper shows some basic architecture for
reference in the future.

Interesting things: (1) The computational
complexity of dendrite modules (Wi,i-1Ai-1 ○ Ai-1) connected in series is far lower than Horner's method. Will this
speed up the calculation of basic functions in computers? (2) The range of sight of animals has a
gradient, but the convolution layer does not have this characteristic. This
paper proposes receptive fields with a gradient. (3) The networks using Gang
neurons can delete traditional networks' Fully-connected Layer. In other words,
the Fully-connected Layers' parameters are assigned to a single neuron, which
reduces the parameters of a network for the same mapping capacity.

One important thing: ResDD can replace the current all ANNs' Neurons (ResDD modules+One Linear module)! ResDD has controllable precision for better generalization capability!

Gang neuron code is available at https://github.com/liugang1234567/Gang-neuron.
Wireless Ice Detection and Monitoring using Flexible UHF RFID Tags
Authors: Wagih Mahmoud , Shi Junjie
Published: July 2021

Owing to its low relative permittivity, very few microwave sensors have been developed for monitoring ice deposition. This paper presents the first use of UHF RFID tags for wireless RF ice sensing applications. Despite its low permittivity, the existence of ice as a superstrate on a planar ultra-thin dipole antenna can lower the resonance frequency of the antenna significantly. The RFID tags, having a measured unloaded range of 9.4 m, were evaluated for remotely detecting the formation of ice in various scenarios and up to 10~m from the reader, as well as monitoring the ice thawing, based on the Relative Signal Strength (RSS) in a phase-free approach. Unlike conventional RSS-based sensing approaches where the tag's read-range is reduced as the RSS decreases in response to the stimulant, the ice superstrate improves the impedance matching of the tags, maintaining a 10 m loaded read-range with over 12 dB ice-sensitivity, in an echoic multi-path environment. The long range and high sensitivity show that UHF RFID is a promising method of detecting and monitoring ice formation and thawing in future smart cities.
FDTD Computation of Space/Time Integrated Electromagnetic Lagrangian: New Insights on Mutually Coupled Wide-band Antenna Design
Authors: Sarkar Debdeep , Antar Yahia
Published: July 2021

In this paper, we develop a formalism based on either spatially or temporally integrated electromagnetic (EM) Lagrangian, which provides new insights about the near-field reactive energy around generic antennas for arbitrary spatio-temporal excitation signals. Using electric and magnetic fields calculated via FDTD technique and interpolation routines, we compute and plot the normalized values of space/time integrated EM Lagrangian around antennas. While the time-integration of EM Lagrangian sheds light onto the spatial distribution of inductive/capacitive reactive energy, time-variation of spatially integrated EM Lagrangian can help in design of ultra-wideband (UWB) MIMO antennas with low mutual coupling. The EM Lagrangian approach can assist in design of energy harvesting and wireless power transfer systems, as well as for electromagnetic interference mitigation applications.
Fake News detector: A Dynamic approach for Detecting Fake News using Neural Network
Authors: Jain Manas
Published: July 2021

Online news stages extraordinarily impact our public and culture in both positive and negative manners. As online media turns out to be more reliant for wellspring of data, a ton of fake news is posted on the web, that far reaching with individuals following it with no earlier or complete data of occasion legitimacy. At the point when somebody (or something like a bot) imitates somebody or a solid source to bogus spread data, that can likewise be considered as fake news. Much of the time, individuals making thisbogus data have a plan, that can be political, prudent or to change the conduct or considered a topic. This paper audits different Machine learning approaches in location of fake and created news. The limit of such and approaches and act of spontaneity via carrying out deep learning is additionally surveyed
Magnetic Field Based Positioning Systems
Authors: Carbone Paolo
Published: July 2021

This paper has the main purpose to give an introductory survey on the various systems that exploit magnetic fields for positioning. Such systems find applications in those scenarios, both indoors and outdoors, where Global Navigation Satellite Systems (GNSS) are not available or fail to provide information with the needed accuracy. While the main idea of using electromagnetic fields to provide position information dates back to the past century, new application–led research on this topic has emerged in recent years. Results have expanded the application range of Magnetic Positioning (MP) technologies and form now a domain of knowledge that enables realization of positioning systems applicable to indoor and outdoor environments.

The paper provides the main characteristics of different positioning systems with focus on those solutions that are based on low–frequency magnetic fields. Some background theory is presented and positioning results from the literature are analyzed and compared.
RESEARCH FACTORS INFLUENCING STUDENTS ACCOUNTING CAREER PATH: A GHANAIAN PERSPECTIVE
Authors: Wilson Elorm Pekyi  , Zhang Wenfang  , Takyi Kwabena Nsiah  , Ofori Charles  , Abraham Lincoln Ayisi
Published: July 2021

Due to increasing demands for the accounting professional and limited studies devoted to the accounting context in developing countries like Ghana. This investigates the objectives to explore the factors influencing students accounting careers paths. A closed-ended questionnaire based on 5-point Likert scale was administered to record response. Data was collected through online survey and shared via WeChat and WhatsApp among the university’s students. The SmartPLS 3.0 was employed to run analysis on 337 valid responses. The research findings include the positive and significant effect of financial benefits, influence of third parties and cost and benefits on students accounting careers path. The model of the study explained 57.2% variation. The research evidenced that among the factors financial benefits has a strongest influence on students’ intentions towards accounting career path. The study also has several theoretical and practical implication for the scholars and practitioner.
A Novel Approach to Detect Abnormal Chest X-rays of COVID-19 Patients Using Image Processing and Deep Learning
Authors: Chattopadhyay Subhagata
Published: July 2021

The study proposes a novel approach to automate classifying Chest X-ray (CXR) images of COVID-19 positive patients. All acquired images have been pre-processed with Simple Median Filter (SMF) and Gaussian Filter (GF) with kernel size (5, 5). The better filter is then identified by comparing Mean Squared Error (MSE) and Peak Signal-to-Noise Ratio (PSNR) of denoised images. Canny's edge detection has been applied to find the Region of Interest (ROI) on denoised images. Eigenvalues [-2, 2] of the Hessian matrix (5 × 5) of the ROIs are then extracted, which constitutes the 'input' dataset to the Feed Forward Neural Network (FFNN) classifier, developed in this study. Eighty percent of the data is used for training the said network after 10-fold cross-validation and the performance of the network is tested with the remaining 20% of the data. Finally, validation has been made on another set of 'raw' normal and abnormal CXRs. Precision, Recall, Accuracy, and Computational time complexity (Big(O)) of the classifier are then estimated to examine its performance.
Modeling and Comparative Analysis of Different Generic Cross Section B-Pillar Design in Roof Crush Impact
Authors: Pankaj Kumar Jha  , Arakerimath Rachayya
Published: July 2021

When a vehicle tips over onto its roof or side due to internal or external force on a vehicle is called Rollover impact. Rollover is a very critical impact compared to another mode of vehicle impacts. B-pillar and its cross-section design are very critical in the rollover impacts by reducing the cabin intrusion of vehicle. B-pillar absorbs most of the energy at the time of rollover and reduces the fatality rate of the passenger. In this work, a B-pillar finite element (FE) model is modeled to analyze as per FMVSS216a standard protocol to check the critical performance. Two generic cross-sections of the B-pillar are considered for preliminary assessment. This B-pillar designs FE model (cut model) are modeled and analyzed for FMVSS216a using LS-DYNA explicit code. The FMVS216a lab test is a quasi-static test and LS-DYNA is the well-accepted FEA tool to simulate the quasi-static test. LS-DYNA software is widely accepted as a multi-purpose finite element analysis (FEA), capable of solving complex problems in the field of Automobile, Aerospace, etc. So LS-DYNA is considered for the study of the B-Pillar simulations. Both the B-pillar designs are accessed and compared with respect to energy absorption, crush resistance characteristics with respect to the full vehicle rollover test. With the detailed performance study of both cross-section designs under rollover impact, the best performing B-pillar design in terms of high energy absorption and high vehicle resistance is selected for furtheroptimization study to meet the Roof crush standard requirements.
Buccal Acupuncture Combined with Stellate Ganglion Block in the Treatment of Intractable Vertigo Syndrome: A Case Report
Authors: Deng Wenguang , Zhang Yuenong , Xu Jian , Ye Jinxiang
Published: July 2021

Intractable vertigo syndrome can be diagnosed after failure of routine treatments for benign paroxysmal positional vertigo (BPPV). Stellate ganglion block can be used in patients who do not respond to oral medication. However, buccal acupuncture combined with stellate ganglion block
in the treatment of intractable vertigo syndrome has not been described yet. In this case report, we describe a patient who showed good response to combined treatment with buccal acupuncture and stellate ganglion block.
Topical Ethanol Therapy for Human Papillomavirus in Atheroma
Authors: Murata Etsuo , Tokita Kazutaka , Tsurusaki Shigeyuki , Murata Hidetaka
Published: July 2021

We have developed ethanol therapy for infectious atheroma based on the experience of two cases in which ethanol was injected into the liver cyst and the cyst shrank. For 64 infectious atheromas, atheroma contents were excreted and the cyst wall was contacted with 76% ethanol gauze for
5 minutes. Postoperatively, the cyst was washed daily as an open drainage. All cases were cured 10 days postoperatively, and no side effects. Postoperative follow-up study results in 36 cases showed no recurrence in an average of 5 years. Pathological examination revealed koilocytosis in 14
of 25 cases (56.0%), which is considered to be an indirect finding of viral infection. The changes in human papillomavirus (HPV 16) before and after ethanol therapy in 25 cases using the Bi-Digital O- ring Test (BDORT) decreased significantly from 1026.0 ng (BDORT units) preoperatively to
1.6ng (BDORT units) postoperatively. In also 12 cases follow- up study without microscopy HPV 16 same decreased from 1064.2ng to 1.2ng (BDORT unit) using BDORT with atheroma photographs. In total, HPV 16 could be demonstrated in 37 of 64 cases (57.8%) using BDORT. Temporal changes of HPV 16
used for BDORT in 7 cases after contact with ethanol were inactivated after 3 minutes 30 seconds. The involvement of HPV 16 is suggested as the cause of atheroma. It is speculated that ethanol inactivated HPV 16 of atheroma, which stopped the turnover of the squamous epithelium and prevented
recurrence. Ethanol therapy for infectious atheroma is useful as an original new one-stage surgery because it is a simple procedure and has no side effects or recurrence.
The Effectiveness of Electro-acupuncture in Ovarian Ischemia Reperfusion Injury
Authors: Keskin Seda , Keskin Deha Denizhan , Değermenci Muhammet , Hancı Hatice , Karabekir Nuket Göçmen , Atak Mehtap , Baş Orhan
Published: July 2021

Electro-acupuncture is widely used in gynecology. Adnexal torsion is an important threat to ovarian reserves in women of reproductive age. This is the first study to investigate whether electro-acupuncture is beneficial in protecting ovarian reserves in case of adnexal torsion resulting
in reperfusion injury. Thirty-two female Wistar Albino rats were randomized into four groups: the first group — sham operation, the second group — torsion/detorsion model, the third group — pre-acupunture + torsion/detorsion + post-acupuncture, and the fourth group —
torsion/detorsion + post-acupuncture. The acupoints used were CV4 and bilateral SP6, Ex-CA1, Kid3, and ST36. In the third group, the acupoints were needled for two weeks before torsion, continuing for a further two weeks after torsion. In the fourth group, needling began after torsion and
was maintained for two weeks. Both histological and biochemical parameters indicating ovarian reserves showed that electro-acupuncture applied to the above points exhibited an ameliorating effect on ovaries injured during ischemia/reperfusion. Electro-acupuncture may be capable of protecting
against and preventing ischemia/reperfusion injury in case of ovarian torsion.
Avaliação das tele-aulas em tempo de covid-19 pelos encarregados de educação de Luanda
Authors: Brás Chocolate
Published: July 2021

Este artigo estuda a implementação das tele-aulas em Angola, como uma das principais acções e medidas de política adoptadas pelo sector da educação em resposta à suspensão das actividades lectivas presenciais no país. O estudo tem como objectivo reflectir sobre os resultados da avaliação das tele-aulas feita pelos encarregados de educação da província de Luanda durante o período de Estado de Emergência. Trata-se de um estudo exploratório, cuja sustentação teórica é feita com suporte aos estudos de Souza & Aguiar (2020) e Bahia (2020), articulados com a análise de relatórios do Ministério da Educação (2019; 2020), do Instituto Nacional de Estatística (2016; 2017), de alguns referentes bibliográficos internacionais, com particular realce para as recomendações da UNESCO (2020), OCDE (2020), Organização Mundial da Saúde (2020), estudos da EdTechHub & Elearning Africa (2020) e da Save the Children International (2020). Para compreender a avaliação das tele-aulas realizou-se um inquérito por questionário online aplicado a cento e dezassete (117) encarregados de educação durante o mês de Abril do ano 2020. O estudo concluiu que a produção das tele-aulas foi uma boa alternativa à suspensão das aulas presenciais, apesar de 23,1% das crianças não as terem acompanhado por desatenção e falta de acompanhamento dos encarregados de educação, constantes de cortes de energia eléctrica e da sua falta em algumas zonas, associado à falta de sinal de televisão, bem como a não posse de aparelho de televisão da parte de alguns agregados familiares pela débil situação socioeconómica que os caracterizam.
Contracção dimensional sistemática: uma proposta metodológica para o cálculo de equações e sistemas de M equações lineares com N incógnitas.
Authors: Zau Francisco Lubota Bufeca
Published: July 2021

Os sistemas lineares homogéneos integram propriedades especiais que os diferenciam dos demais sistemas lineares e permitem simplificar a busca por soluções que, em certas condições, promovem soluções gerais de até sistemas heterogéneos e sistemas não lineares, daí a sua crucial importância na Matemática, ciências afins e na Engenharia. Desde os Nove Capítulos sobre a Arte Matemática da China Antiga a autores como SekiKowa, Leibniz, Cayley, Silvester, Bôcher, a resolução dos sistemas lineares passou a contar com métodos matriciais firmados em resultados teóricos como o algoritmo de eliminação de Gauss-Jordan, o teorema de Cramer, o teorema de Kronecker-Capelli. Introduziu-se, também, métodos iterativos clássicos como os de Jacobi-Richardson, Gauss-Seidel, factoração de Cholesck, o método SOR, métodos iterativos dos gradientes conjugados, assim como métodos gráficos. Contudo, este artigo apresenta uma alternativa metodológica inovadora denominada contracção dimensional sistemática, que não se funda em matrizes: visa, entre outras dinâmicas, reduzir, de forma sistemática, o número de incógnitas até que a respectiva resolução seja viável. Nesta visão, objectiva-se analisar a operacionalidade deste método de contracção dimensional sistemática no estudo de equações e sistemas lineares, a partir de técnicas homogéneas. Para o efeito, este artigo serve-se de uma pesquisa teórico-metodológica, de tipologia explicativa, com procedimentos técnicos bibliográficos e que utiliza o método indutivo - dedutivo. Assim, foi construído o método de contracção dimensional sistemática e aplicado para a obtenção de soluções originais e exactas de sistemas homogéneos de equações lineares, porque soluções desta natureza são condição necessária para a construção do produto vectorial homogéneo e, em geral, da Teoria Homogénea dos Espaços Vectoriais.
La educación en Ciencia, Tecnología y Sociedad para la formación investigativa del ingeniero civil.
Authors: Vilar de los Santos Finalé Marlene , Pla López Ramón Vidal
Published: July 2021

El objetivo de este artículo es explicar un proceder didáctico para contribuir a la formación investigativa de los estudiantes desde el proceso de enseñanza aprendizaje (PEA) de la asignatura Problemas Sociales de la Ciencia y la Tecnología (PSCT), en la carrera de Ingeniería Civil de la Universidad Máximo Gómez Báez, Cuba. Se parte de analizar las insuficiencias que persisten en la formación de los ingenieros civiles respecto a su desarrollo investigativo causado por las características que asume el proceso de formación. A partir del método de estudio de contenidos de autores como: Restrepo Gómez (2003), Hilarraza (2012), Zamora Vega (2014), Márquez Valdés y Acosta Urbano (2014), entre otros, se establece la relación entre Formación Investigativa - Enfoque Ciencia Tecnología y Sociedad (CTS) - Proceso de Enseñanza Aprendizaje de la asignatura PSCT. Se aplicó una encuesta a profesores para determinar las causas de las insuficiencias del proceso de formación de los estudiantes. El estudio de contenido y el diagnóstico realizado permitió elaborar un proceder didáctico para perfeccionar el proceso de enseñanza aprendizaje de la referida asignatura. El nuevo proceder didáctico se implementó en el tercer año de la carrera de Ingeniería Civil de la Universidad Máximo Gómez Báez, Cuba. Se realizaron evaluaciones sistemáticas de los indicadores establecidos y se obtuvieron resultados significativos registrados y sometidos a pruebas estadísticas. Se demuestran coincidencias de los resultados con los fundamentos teóricos estudiados a través de diferentes autores.
Modelo de emprendimiento para estudiantes universitarios: A través de una revisión documental
Authors: Cervantes-González Emiliano , Hernández López Ma Sandra
Published: July 2021

Al emprendimiento se le ha relacionado con el crecimiento económico regional por lo que en las universidades se forman emprendedores continuamente. Se pretende descubrir cuáles son los elementos clave y generar un modelo de emprendimiento. Para ello, se realizó una búsqueda de documentos en las bases de datos de WOS, Scopus, SD, DOAJ, REDIB y ERIC, y se aplicó la cartografía conceptual de Tobón et al. (2015). Los resultados mostraron que el emprendimiento tiene tres dimensiones iniciales que son la intención, la orientación y el comportamiento emprendedor, los cuales formaron la base de nuestro modelo antropológico de emprendimiento universitario propuesto.
Recent progress in actuation technologies of micro/nanorobots
Authors: Xu Ke , Liu Bing
Published: July 2021

As a research field of robotics, micro/nanorobots have been extensively studied in recent years because of their important application prospects in biomedical fields, such as medical diagnosis, nanoscale surgery, and targeted therapy. In this article, recent progress on micro/nanorobots is reviewed regarding actuation technologies. First, the different actuation mechanisms are divided into two types, external field actuation and self-actuation. Then, a few latest achievements on actuation methods are presented. On this basis, the principles of various actuation methods and their limitations are also analyzed. Finally, some key challenges in the development of micro/nanorobots are summarized and the next development direction of the field is explored.
EFFECTS OF POLYMER ADDITIVES ON SOME MECHANICAL AND PHYSICAL PROPERTIES OF CEMENT BONDED PARTICLEBOARDS
Authors: TAŞ HASAN HÜSEYİN , ARSLAN BİLGE , KALAYCIOĞLU HÜLYA
Published: July 2021

The effects of some polymer additives, also called super plasticizers, on selected physical and mechanical properties of cement bonded particle board were investigated. Two different kinds of poly carboxylic ether (PF300, DX40) and a melamine based polymer (300M) were added to the wood cement mixture. The ratios of polymer additives to the wood cement mixture were 1%, 1.2% and 1.4%. Cement bonded particleboards were manufactured with wood/cement (w/w) ratio of 1:3; target density of 1300 kg.m-3, and CaCl2 content of 5%. The cement bonded particleboards were tested for water absorption (2 and 24 hour), thickness swelling (2 and
24 hour), bending stiffness and strength and internal bond strength. Results of the study showed that most of the polymer addition decreased water absorption and thickness swelling
of the boards. Replacement of cement with polymers increased internal bond strength and bending stiffness of the boards while bending strength was slightly reduced. Use of small amount of super plasticizers significantly improves most of the board properties.