bluuebunny/crossref_metadata_2025 huggingface dataset:
TD 2645 - A Progressividade dos Tributos Diretos nas Pesquisas de Orçamentos Familiares (POFs) 2008-2009 e 2017-2018
Authors: Junior Pedro Humberto Bruno de Carvalho
Published: May 2021

Este trabalho analisou a distribuição da frequência e da participação na renda domiciliar de quatro tributos diretos nos domicílios brasileiros: Imposto Predial e Territorial Urbano (IPTU), Imposto sobre a Propriedade de Veículos Automotores (IPVA), Imposto de Renda de Pessoa Física (IRPF) sobre rendimentos do trabalho e contribuição previdenciária por estratos de renda e geográfico com base nos dados das duas últimas pesquisas de orçamentos familiares (POFs) 2008-2009 e 2017-2018. O estudo constatou que o IRPF sobre rendimentos do trabalho foi progressivo em todos os estados de renda. O IPTU foi progressivo até os 9% mais ricos onde estabiliza sua participação na renda. O IPVA e a contribuição previdenciária foram regressivos devido ao crescimento recente da propriedade de veículos entre os mais pobres e ao limite máximo da contribuição previdenciária do Regime Geral de Previdência Social (RGPS) para rendas superiores ao teto previdenciário, respectivamente. Por fim, o estudo faz algumas propostas para reforma tributária de forma a tornar esses tributos mais progressivos.
TD 2647- Uma Metodologia para Quantificação de Co-Vítimas de Homicídios no Brasil
Authors: Goes Fernanda Lira , Oliveira Marina Barros de
Published: May 2021

Com a realização de uma primeira quantificação de sobreviventes a homicídios no Brasil publicada no Texto para Discussão no 2489 (Goes e Lopes, 2019), nos dedicamos à elaboração de uma segunda metodologia, próxima à primeira, para quantificar grupos populacionais específicos por raça, cor, faixa etária e sexo de pessoas sobreviventes indiretas ou co-vítimas. A metodologia escolhida calculou sobreviventes com base na elaboração de um multiplicador. Para obter o total populacional, nos apoiamos nos dados da Pesquisa Nacional por Amostra de Domicílios Contínua (PNAD), realizada pelo Instituto Brasileiro de Geografia e Estatística (IBGE); para informações referentes aos homicídios, nos atemos aos dados do Sistema de Informação sobre Mortalidade (SIM), do Ministério da Saúde. A escala geográfica usada na pesquisa foi realizada por meio do recorte de municípios, Unidades da Federação e Brasil.
TD 2649 - Ensaios Operacionais para a Identificação de Cidades Médias
Authors: Moura Rosa , Ferreira Gustavo
Published: May 2021

Neste texto, relatam-se os procedimentos operacionais de dois ensaios realizados para identificar cidades médias brasileiras, e se acrescem a eles duas possibilidades de refinamento na identificação, um de ordem urbana e outro de ordem rural. Com esses relatos, objetiva-se colocar em discussão a necessidade de buscar procedimentos metodológicos e operacionais adequados para captar, sob variadas dimensões, as especificidades dos municípios, antes de formular políticas públicas com incidência territorial em determinada categoria de cidade. Os ensaios realizados consideram o universo de 5.570 municípios do Brasil e se valem de informações comparáveis, portanto produzidas sobre uma mesma metodologia, que expressem as características principais dos municípios e os diferenciem entre si diante da heterogeneidade do conjunto. As informações consideradas e os resultados das classificações fazem parte de um anexo disponibilizado junto com o trabalho. O texto está estruturado em quatro segmentos, além da introdução. No primeiro, retoma-se com brevidade a compreensão conceitual do termo cidade média, suas funções e seu papel na rede de cidades, como também no processo de reestruturação produtiva em finais do século XX. No segundo segmento, fazendo-se uso das centralidades do patamar intermediário da classificação dos municípios brasileiros, segundo a publicação Regiões de Influência das Cidades 2007, do Instituto Brasileiro de Geografia e Estatística (IBGE), foram consideradas cidades médias as capitais regionais C, os centros sub-regionais A e B e os centros de zona A e B, sendo os centros de zona B com população superior a 50 mil habitantes, ou qualquer tamanho populacional quando situados nas regiões Norte, Nordeste ou Centro-Oeste. Parte-se dessa identificação para agregar outros elementos identificadores de especificidades: a inserção em arranjos populacionais; a natureza desses arranjos populacionais; e a existência de alguns polos de regiões imediatas, não captados pelos critérios anteriores, que em áreas de baixa densidade de ocupação exercem polarização sobre grandes extensões ocupadas. No terceiro segmento do trabalho faz-se um exercício de busca das especificidades do conjunto identificado a partir de dois refinamentos complementares aos classificatórios. No quarto segmento, de considerações finais, se enfatiza a diversidade encontrada entre os municípios que podem ser considerados cidades médias e contemplados em políticas públicas voltadas a essa categoria de centros no Brasil.
Ontwaakt! laagopgeleiden der aarde
Authors: Hendrikse Reijer
Published: May 2021

Boekbespreking van: Ewald Engelen (2021) Ontwaak! Kom uit uw neoliberale sluimer.
Absorption Lines in the 0.91–1.33 μm Spectra of Red Giants for Measuring Abundances of Mg, Si, Ca, Ti, Cr, and Ni
Authors: Fukue Kei , Matsunaga Noriyuki , Kondo Sohei , Taniguchi Daisuke , Ikeda Yuji , Kobayashi Naoto , Sameshima Hiroaki , Hamano Satoshi , Arai Akira , Kawakita Hideyo , Yasui Chikako , Mizumoto Misaki , Otsubo Shogo , Takenaka Keiichi , Yoshikawa Tomohiro , Tsujimoto Takuji
Published: May 2021

Red giants show a large number of absorption lines in both optical and near-infrared wavelengths. Still, the characteristics of the lines in different wave passbands are not necessarily the same. We searched for lines of Mg i, Si i, Ca i, Ti i, Cr i, and Ni i in the

, Y, and J bands (0.91–1.33 μm), that are useful for precise abundance analyses, from two different compilations of lines, namely, the third release of Vienna Atomic Line Database (VALD3) and the catalog published by Meléndez & Barbuy in 1999 (MB99). We selected sufficiently strong lines that are not severely blended and ended up with 191 lines (165 and 141 lines from VALD3 and MB99, respectively), in total, for the six elements. Combining our line lists with high-resolution (λ/Δλ = 28,000) and high signal-to-noise ratio (>500) spectra taken with the WINERED spectrograph, we measured the abundances of the six elements in addition to Fe i of two prototype red giants, i.e., Arcturus and μ Leo. The resultant abundances show reasonable agreement with the values in the literature within ∼0.2 dex, indicating that the available oscillator strengths are acceptable, although the abundances based on the two line lists show systematic differences by 0.1–0.2 dex. Furthermore, to improve the precision, solid estimation of the microturbulence (or the microturbulences if they are different for different elements) is necessary as far as the classical hydrostatic atmosphere models are used for the analysis.
Multi-wave band Synchrotron Polarization of Gamma-Ray Burst Afterglows
Authors: Shimoda Jiro , Toma Kenji
Published: May 2021

Multi-wave band synchrotron linear polarization of gamma-ray burst (GRB) afterglows is studied under the assumption of an anisotropic turbulent magnetic field with a coherence length of the plasma skin-depth scale in the downstream of forward shocks. We find that for typical GRBs, in comparison to optical polarization, the degree of radio polarization shows a similar temporal evolution but a significantly smaller peak value. This results from differences in observed intensity image shapes between the radio and optical bands. We also show that the degree of the polarization spectrum undergoes a gradual variation from the low- to the high-polarization regime above the intensity of the spectral peak frequency, and that the difference in polarization angles in the two regimes is zero or 90°. Thus, simultaneous multi-wave band polarimetric observations of GRB afterglows would be a new determinative test of the plasma-scale magnetic field model. We also discuss theoretical implications from the recent detection of radio linear polarization in GRB 171205A with the Atacama Large Millimeter/submillimeter Array and other models of magnetic field configuration.
The Imprint of Large-scale Structure on the Ultrahigh-energy Cosmic-Ray Sky
Authors: Ding 丁忱 Chen , Globus Noémie , Farrar Glennys R.
Published: May 2021

Ultrahigh-energy cosmic rays (UHECRs) are atomic nuclei from space with vastly higher energies than any other particles ever observed. Their origin and chemical composition remain a mystery. As we show here, the large and intermediate angular scale anisotropies observed by the Pierre Auger Observatory are a powerful tool for understanding the origin of UHECRs. Without specifying any particular production mechanism but only postulating that the source distribution follows the matter distribution of the local universe, a good accounting of the magnitude, direction, and energy dependence of the dipole anisotropy at energies above 8 × 1018 eV is obtained after taking into account the impact of energy losses during propagation (the “GZK horizon”), diffusion in the extragalactic magnetic field, and deflections in the Galactic magnetic field (GMF). This is a major step toward the long-standing hope of using UHECR anisotropies to constrain UHECR composition and magnetic fields. The observed dipole anisotropy is incompatible with a pure proton composition in this scenario. With a more accurate treatment of energy losses, it should be possible to further constrain the cosmic-ray composition and properties of the extragalactic magnetic field, self-consistently improve the GMF model, and potentially expose individual UHECR sources.
Competitive ability of native and alien plants: effects of residence time and invasion status
Authors: Sheppard Christine S. , Brendel Marco R.
Published: May 2021

Competition is commonly thought to underlie the impact of plant invasions. However, competitive effects of aliens and competitive response of natives may also change over time. Indeed, as with time, the novelty of an invader decreases, the accumulated eco-evolutionary experience of resident species may eventually limit invasion success. We aimed to gain insights on whether directional changes in biotic interactions over time or more general differences between natives and aliens, for instance, resulting from an introduction bias, are relevant in determining competitive ability. We conducted a pairwise competition experiment in a target-neighbour design, using 47 Asteraceae species with residence times between 8 years-12,000 years in Germany. We first tested whether there are differences in performance in intraspecific competition amongst invasion status groups, that is casual and established neophytes, archaeophytes or native species. We then evaluated whether competitive response and effects depend on residence time or invasion status. Lastly, we assessed whether competitive effects influence range sizes. We found only limited evidence that native target species tolerate neighbours with longer potential co-existence times better, whereas differences in competitive ability were mostly better explained by invasion status than residence time. Although casual neophytes produced most biomass in intraspecific competition, they had the weakest per-capita competitive effects on natives. Notably, we did not find differences between established neophytes and natives, both of which ranked highest in interspecific competitive ability. This lack of differences might be explained by a biased selection of highly invasive or rare native species in previous studies or because invasion success may result from mechanisms other than interspecific competitive superiority. Accordingly, interspecific per-capita competitive effects did not influence range sizes. Further studies across a broader range of environmental conditions, involving other biotic interactions that indirectly influence plant-plant interactions, may clarify when eco-evolutionary adaptations to new invaders are a relevant mechanism.
Western pond turtles in the Mojave Desert? A review of their past, present, and possible future
Authors: Lovich Jeffrey E. , Jefferson George , Reynolds Robert , Scott Peter A. , Shaffer H. Bradley , Puffer Shellie , Greely Sarah , Cummings Kristy , Fisher Robert N. , Meyer-Wilkins Kathie , Gomez Doug , Ford Morgan , Otahal Christopher D.
Published: May 2021

The western pond turtle (WPT) was formerly considered a single species (ActinemysorEmys marmorata) that ranged from southern British Columbia, Canada to Baja California, México. More recently it was divided into a northern and a southern species. WPTs are found primarily in streams that drain into the Pacific Ocean, although scattered populations exist in endorheic drainages of the Great Basin and Mojave deserts. Populations in the Mojave Desert were long thought to be restricted to the Mojave River, but recently another population was documented in Piute Ponds, a terminal wetland complex associated with Amargosa Creek on Edwards Air Force Base. WPT fossils in the Mojave Desert are known from the Miocene to the Pleistocene. Recently, Pleistocene fossils have been found as far into the desert as Salt Springs, just south of Death Valley. The oldest fossil records suggest that WPTs were present in wetlands and drainages of the geological feature known as the Mojave block prior to the uplift of the Sierra Nevada Range about 8 Ma and prior to the ~ 3 Ma uplift of the Transverse Ranges. Archaeological records document use of turtles by Native Americans for food and cultural purposes 1,000 or more years ago at the Cronese Lakes on the lower Mojave River and Oro Grande on the upper river. The first modern publication documenting their presence in the Mojave River was 1861. Museum specimens were collected as early as 1937. These fossil and early literature records support the indigenous status of WPTs to the Mojave River. However, mtDNA-based genetic evidence shows that Mojave River turtles share an identical haplotype with turtles on the California coast. Limited nuclear data show some minor differences. Overdraft of water from the Mojave River for municipal and agricultural uses, urban development, and saltcedar expansion are threats to the continued survival of WPTs in the Mojave River.
High endemicity in aquatic dance flies of Corsica, France (Diptera, Empididae, Clinocerinae and Hemerodromiinae), with the description of a new species of Chelipoda
Authors: Ivković Marija , Perović Marija , Grootaert Patrick , Pollet Marc
Published: May 2021

All known records of aquatic dance flies (Empididae, Clinocerinae: 21 species; Hemerodromiinae: eight species) from the island of Corsica (France) are summarized, including previously unpublished data and data on the newly described species Chelipoda puschae Ivković, Perović & Grootaert, sp. nov. This species was collected during the “La Planète Revisitée Corsica 2019” survey and represents the first description of a new species in the genus Chelipoda from the European–Mediterranean region in more than 180 years. A key to European species of Chelipoda is provided. Including the new species, five species are recorded from Corsica for the first time: Dolichocephala malickyi Wagner, 1995, Dolichocephala oblongoguttata (Dale, 1878), Dolichocephala ocellata (Costa, 1854), Chelifera subangusta Collin, 1961, and Hemerodromia unilineata Zetterstedt, 1842. The new species is described and illustrated, and new records of aquatic dance flies from Corsica are given, with new data on 17 species in eight different genera. At present, 29 species of aquatic dance flies are known from Corsica, with 10 species endemic to the island.
Transdermal delivery of carnosine into equine skeletal muscle
Authors: Dieter B.P. , Macias C.J. , Sharpe T.J. , Roberts B. , Wille M. , Young A. , Reisenauer C. , Cantrell B. , Bayly W.M.
Published: May 2021

The dipeptide carnosine consists of β-alanine and L-histidine. It plays a major role in skeletal muscle metabolism, especially as an intracellular buffer and antioxidant. Increasing intramuscular carnosine has been shown to improve recovery from exercise and increase anaerobic threshold and time-to-exhaustion. Dietary supplementation with carnosine does not effectively increase intramuscular carnosine due to the presence of carnosinase in the blood. However, an effective transdermal delivery process could expediently increase intramuscular concentrations of carnosine. This study’s objective was to examine the efficacy of a transdermal system for delivering carnosine into the skeletal muscle of horses, using a randomised, placebo controlled, crossover study. Carnosine plus a proprietary transdermal delivery agent or the agent alone (placebo) were applied to the middle gluteal muscles of 10 Thoroughbred racehorses, and muscle biopsies were taken before and 30, 60, and 120 min after application. Muscle carnosine concentration was measured using an enzyme-linked immunosorbent assay. A two-way repeated measures analysis of variance was used to test for the main effects of time and treatment (placebo or carnosine) as well as an interaction between time and treatment. Independent F-tests examined the change in intramuscular carnosine levels from baseline to each time point (30, 60, and 120 min). There was a significant main effect of treatment (P=0.004), no significant main effect for time (P=0.18), and a non-significant interaction of treatment with time (P=0.08). Mean intramuscular carnosine concentrations increased from baseline to 120 min. Compared to concentrations following placebo application, carnosine was greater by ~35% at 30 min (P=0.002) and ~46% after 60 min (P=0.044), but not at 120 min (P=0.20). The results indicated that intramuscular carnosine can be increased using a transdermal delivery system within 60 min of application which could have important implications for the health of horses, and their capacity to perform and recover from physical activity.
Analysis of Rural-Based Pre-Service Teachers Spatial-Visualisation Skills in Problem Solving in Vector Calculus Using MATLAB
Authors: Amevor Godfred , Bayaga Anass , Bosse Michael J.
Published: May 2021

In science, technology, engineering and mathematics (STEM) for instance, interdisciplinary studies have noted positive correlation between spatial-visualization (SV skills) and mathematical problem solving. The majority of these studies sharing a link between SV skills and problem solving were contextualized in urban settings and only a few in rural settings. This investigation analyses how rural-based pre-service teachers apply their SV skills in problem-solving in a South African university, in the context of vector calculus. One hundred rural-based pre-service teachers in a second year vector calculus class at University of Zululand (UNIZULU) were randomly selected into control and experimental groups. MATLAB was used as a dynamic visual tool to analyse how research participants applied their SV skills. A mixed method approach was employed in data collection (quantitative and qualitative). Our findings revealed that the rural-based pre-service teachers’ SV skills correlate with their problem-solving skills in vector calculus.
Formation of Professional Competence of University Students Based on a Systematic Approach
Authors: Issakova Gulnur O. , Kaltayeva Gulnar , Bakhtiyarova Gulshat R. , Ibrayeva Kulyan , Kudaibergenova Sayagul
Published: May 2021

The purpose of this article is to demonstrate the feasibility and effectiveness of a systematic approach to the formation of professional competence of students in higher educational institutions. The study was conducted in the S. Seifullin Ka-zakh Agro Technical University with the participation of 126 master students (2 groups) of the specialty “Vocational Education”. Using a complex of theoretical, empirical and statistical methods, it was possible to show the ways to increase the effectiveness of the educational process. The basic principles for the training of students were formulated as: 1) systematic approach to the formation of profes-sional competence, organization and implementation of the educational process; 2) program-targeted formation of the indicative basis of the upcoming profes-sional activity, and 3) creating a competency model of the corresponding special-ist as a hierarchy of the student’s professional competency system, its subsys-tems, and supersystems. It is recommended that Kazakhstan universities should improve tools and procedures for assessing and monitoring students’ level of knowledge, as well as create new programs for developing students’ professional competencies to ensure their successful employment. The further research on the matter may be the systematic comparative study of contemporary teaching meth-ods and techniques to determine the most productive ways to prepare future pro-fessionals.
Management Priorities of Audiovisual Student Projects during the COVID-crisis
Authors: Goian Vita , Goian Oles , Biletska Tetiana
Published: May 2021

COVID-crisis has made significant changes in the educational process of many coun-tries, including the need for new management decisions that would solve the complex problem of accelerating the development of online resources for distance learning. Management, particularly in education, is valuable when it is able to combine both general and specific goals. Especially when it comes to a specific educational process for training future TV and radio journalists, advertisers and PR-managers, screenwrit-ers and directors, sound directors, TV presenters, film and cameramen. The peculiarity of these professions is the combination of both creative and technological components of production and placement of professional audio-video content, i.e. content pro-duced by TV and radio companies, film or TV studios, advertising agencies, and aimed at a mass audience. One of the basic priorities in training such specialists is, first of all, the practice, which is based on the planned implementation of educational audiovisual projects and the ability to put them into effect in certain circumstances, including COVID-crisis caused by COVID-19 virus. Therefore, the aim of the article is to hypothesize how to build a productive distance educational strategy in the condi-tions of COVID-crisis, which specifically affected the quality of practical training of specialists in the field of audiovisual media and arts in Ukraine.
Education and Music Culture in the Context of Web 2.0
Authors: Revenko Vira
Published: May 2021

Total digitalization of culture requires the extensive integration of Web 2.0 ser-vices and capabilities into music education. The penetration of digital technologies is not reduced to the technologies for fixing and distributing musical works or the means of their broadcasting but also dramatically transforms the process of creat-ing musical works. Web 2.0 offers a new distributed creativity culture and pro-vides musicians with specific opportunities to work and distribute creative prod-ucts. The study is devoted to the integration of music education and the services and opportunities that Web 2.0 provides to the mass audience (free specialized and non-specialized services), its impact on the quality of music education, as well as on the most important psychological parameters of students of music uni-versities. The study involved 150 students of R. Glier Kyiv Municipal Academy of Music (Kyiv, Ukraine); there were three groups of 50 participants: two exper-imental groups and a control one. In Experimental Group 1, training was partially integrated with Web 2.0 services; in Experimental Group 2, there was a more complete and structured integration. Based on the results of semester training and the objective test scores, a significant increase in the results of experimental groups was observed (an increase by 1.3 points in Group 1 and 2.84 points in Group 2 on a 5-point scale); Group 2 demonstrated a more significant improve-ment. The subjective assessment of the level of involvement, motivation and anx-iety showed a statistically significant decrease in academic anxiety in the experi-mental groups (2.99 and 2.01 compared to 3.98 in the control group, respective-ly) and a statistically significant increase in motivation and involvement in the group with deep integration of Web 2.0 services (Experimental Group 2). The hypothesis of the study that deep integration of Web 2.0 services and capabilities into music education will increase objective academic results, motivation and stu-dent involvement has been fully confirmed. It has also been revealed that it helps students reduce academic anxiety. The research results can be used as a basis for further research and in the course of the development of music education curricu-la based on online learning, mobile learning and the integration of music learning into a digital environment.
Analysis of an Extensible Teaching Mode for Cultivating College Students into Innovative Talents
Authors: Li Changliang , Liu Hui
Published: May 2021

The competition between countries is essentially the competition of innovative talents. However, China now faces multiple problems in the cultivation of innovative talents: the talents are weak in innovation ability; the high-level innovative talents are not sufficient; neither the quality or level of talents fully meet the demand of social and economic development. As a result, it is urgent for colleges to renovate the cultivation mode of innovative talents. Focusing on the cultivation of innovative talents majoring in architectural design, this paper thoroughly analyzed the extensible teaching mode for cultivating college students into innovative talents. Firstly, a questionnaire survey on relevant issues was carried out among employers and college graduates. The survey results revealed several problems with the innovative talent training in Chinese colleges, namely, the irrational curriculum design, the narrow scope of training objectives, and the lack of diverse teaching methods. Results verified, the employers are not highly satisfied with the innovative talents, especially the newly graduated ones. These problems are attributable to the weak professional development ability, poor teamwork ability, and insufficient innovation ability. To solve these problems, the authors analyzed and expounded the extensible teaching mode for the cultivation of innovative talents from four aspects: teaching content scope, teaching methods, teaching space, and appraisal. The research findings enrich the evidences of innovative talent training in Chinese colleges, providing a reference for improving the training quality of innovative talents.
Strategies to Enhance the Teaching Competence of University Teachers in English Major
Authors: Xiang Yafang
Published: May 2021

This paper aims to find strategies to improve the teaching ability of college teachers in English major, which is affected by various factors. Firstly, the teaching ability deficiencies of college teachers in English major were analyzed, and the connotations of this ability were summarized. On this basis, a novel measurement system was established for the teaching ability of college teachers in English major. Then, analytical hierarchy process (AHP) was combined with Shannon’s information theory into an improved model to measure the said teaching ability. In addition, several strategies were presented to improve teaching ability of college teachers in English major. The research results provide a good guide for the teaching reform in English major.
The Intelligent Platform of Autonomous Learning in Post-Secondary Education
Authors: Samusenkov Vadim , Klyushin Vladimir , Prasolov Valeriy , Sokolovskiy Konstantin
Published: May 2021

The aim of the study was to develop and test the effectiveness of an autonomous learning intelligent platform in post-secondary education. It was conducted on the basis of the Institute of Dentistry named after E.V. Borovsky in I.M. Sechenov First Moscow State Medical University (Moscow, Russia) and Humanitarian and technical academy (Kokshetau, Kazakhstan). This research involved 59 teachers and 390 students, who comprised the total sample of 449 respondents. The experiment consisted of three stages – introductory, experimental, and final. The introductory stage included the distribution of enrolled students into the experimental and control groups. Besides, at the introductory stage, the development of questionnaires directed at identifying students’ and teachers’ readiness to implement autonomous learning was performed. Apart from this, the involved educators were required to fill the learning platform with predetermined training content. The considered intelligent learning platform was developed by programmers by prior agreement with educational institutions under study. The experimental stage was aimed at introducing the designed model of autonomous learning based on the created intelligent platform. The final stage implied surveying of all study participants according to the developed questionnaires. After the introduction of the created autonomous learning model, it was revealed that 51.5% of enrolled teachers were ready for self-directed education at a high level, 20.4% – at a satisfactory level, 18.4% – at a moderate level, and 9.7% – at a low level. Among the students of Sechenov University, 21% of respondents had a high level of readiness for autonomous learning based on intelligent platforms, 27% of students had a sufficient level, 35% – moderate, and 17% – low. Among the Humanitarian and technical academy students, 29% had a high readiness for autonomous learning, 30% were ready at a sufficient level, 25% at a moderate, and 16% at a low level. This study provided an opportunity to use the developed questionnaires and the model of autonomous learning in post-secondary education for further research on the implementation of self-directed training.
Face Recognition Using the Convolutional Neural Network for Barrier Gate System
Authors: Prasetyo Mochammad Langgeng , Wibowo Achmad Teguh , Ridwan Mujib , Milad Mohammad Khusnu , Arifin Sirajul , Izzuddin Muhammad Andik , Setyowati Rr Diah Nugraheni , Ernawan Ferda
Published: May 2021

The implementation of face recognition technique using CCTV is able to prevent unauthorized person enter the gate. Face recognition can be used for authentication, which can be implemented for preventing of criminal incidents. This re-search proposed a face recognition system using convolutional neural network to open and close the real-time barrier gate. The process consists of a convolutional layer, pooling layer, max pooling, flattening, and fully connected layer for detecting a face. The information was sent to the microcontroller using Internet of Thing (IoT) for controlling the barrier gate. The face recognition results are used to open or close the gate in the real time. The experimental results obtained average error rate of 0.320 and the accuracy of success rate is about 93.3%. The average response time required by microcontroller is about 0.562ms. The simulation result show that the face recognition technique using CNN is highly recommended to be implemented in barrier gate system.
Real Time System Monitoring and Analysis-Based Internet of Things (IoT) Technology in Measuring Outdoor Air Quality
Authors: Irawan Yuda , Wahyuni Refni , - Muhardi , Fonda Hendry , Luthfi Hamzah Muhammad , Muzawi Rometdo
Published: May 2021

The presence of large peatland in Riau, Indonesia, could cause air pollution due to peatland fires which causes the presence of thick smoke every year in Riau,  dis-rupting human activities. In order to monitor the air quality, in this paper,  the main advantage of the  Internet of Things (IoT) is the ability to transfer data over the network without requiring human-to-human or human interaction to the com-puter   used. In this paper, we propose an air quality monitor that can display web-based information to show the temperature and air humidity, and detects CO, CO2 gases, and alcohol in real time with the help of DHT11 and MQ135 sensors, Arduino Uno and Raspberry Pie. The results show our proposed system can successfully show each parameter of the air quality on the website and make suggestions about the overall air quality level. With our proposed system, we hope the government can respond faster to mitigate the bad air quality level and give information to public about the air quality level in a faster and more accurate way.
Towards an Efficient Integrated Distance and Blended Learning Model: How to Minimize the Impact of COVID-19 on Education
Authors: Al-Hunaiyyan Ahmed , Alhajri Rana , Bimba Andrew
Published: May 2021

As governments and international bodies worldwide sought to prevent the spread of Covid-19, underdeveloped countries have been particularly challenged as they have little or no technological models and frameworks in place and the literature offers little guidance. The current research applied a quantitative approach to researching educational practitioners’ perceptions of e-learning acceptance, using a sample of 4,024 educators and students from a range of Kuwaiti educational institutions. Findings indicate that respondents were slightly supportive of e-learning adoption, with a majority acknowledging its advantages. However, respondents also mention the need for development in the technological competencies required to operate the proposed e-learning programs and a range of challenges that may impact e-learning. Hence, the authors propose a distance and blended learning model (DBLM) to enhance the implementation, utilisation, and evaluation of e-learning within the Kuwaiti educational system. Also, an e-learning teacher capability maturity model (eTCMM) was proposed to foster educators’ competencies and enable their active use of e-learning platforms.
A Review on Various Applications of Reputation Based Trust Management
Authors: Ramya Govindaraj , Priya Govindaraj , Subrata Chowdhury , Kim Dohyeun , Tran Duc Tan , Le Anh Ngoc
Published: May 2021

The extremely vibrant, scattered, and non–transparent nature of cloud computing formulate trust management a significant challenge. According to scholars the trust and security are the two issues that are in the topmost obstacles for adopting cloud computing. Also, SLA (Service Level Agreement) alone is not necessary to build trust between cloud because of vague and unpredictable clauses. Getting feedback from the consumers is the best way to know the trustworthiness of the cloud services, which will help them improve in the future. Several researchers have stated the necessity of building a robust management system and suggested many ideas to manage trust based on consumers' feedback. This paper has reviewed various reputation-based trust management systems, including trust management in cloud computing, peer-to-peer system, and Adhoc system. 
Vers un « modèle français » de régulation de l’intelligence artificielle fondé sur l’innovation sociale ?
Authors: Chevret-Castellani Christine , Labelle Sarah
Published: May 2021

Nous présentons dans cet article les résultats d’une enquête sur les politiques publiques de régulation de l’intelligence artificielle et en particulier sur les stratégies mises en œuvre dans des cadres socio-politiques aux échelles nationales, européennes et internationales. La France a créé des instances dans lesquels des « frottements » entre acteurs différents sont possibles, comme les groupes d’experts ou le Partenariat Mondial sur l’Intelligence Artificielle. Nous considérons que le travail de la part de l’ensemble des groupes sociaux, impliqués dans les instances que nous observons, est consubstantiel à la régulation. Les acteurs publics et privés s’organisent pour échanger et interagir de façon structurée, notamment par la mise en place de ces instances, comme le PMIA. Les dispositifs et instruments, auxquels les différents acteurs participent, contribuent à conférer un sens aux activités de régulation. Notre hypothèse repose sur l’émergence d’un « modèle français » de la régulation qui tend à promouvoir la « confiance » et dont le sens est de parvenir à l’acceptabilité sociale de l’IA.
Internet of Things for Travel Services
Authors: Polat Serkan , Esen M. Fevzi
Published: May 2021

A variety of data sources are available from smart devices which are connected to each other via different communication protocols. These devices are designed to be used in human-centric environments through a distributed physical-virtual interaction. Internet of things (IoT) is a concept of gathering the variety of devices through wired or wireless connections anytime and anyplace. This helps to create new services by integrating the physical world into virtual systems within various domains of tourism. In this chapter, the authors discuss the importance of IoT data for travel services. In the study, the major challenges and opportunities of IoT that allow tour operators and travel agencies to improve the customer experience and provide personalized services are examined. It is concluded that although there are studies on the use of IoT applications within tourism industries, there have been very limited studies conducted on integrated applications of IoT, especially for tour operators and travel agencies.
Knowledge Management is Why E-Government Exists
Authors: Williams Idongesit
Published: May 2021

There are many countries in the world where e-government services are underdeveloped. In e-government literature, numerous reasons are attributed to the failures in the implementation of e-government services. A reason often overlooked is the fact that government agencies may not see the value of existing ICTs to the current knowledge management processes supporting the delivery of government services. In this chapter, the Mobilization-Decision theory is used to explain how the perceived knowledge management value that can be enabled using information and communication technologies resulted in the implementation of e-government services in Europe.
Development of Forming Method of Deployable Boom from Thermoplastic Polymer Composite
Authors: Iuvshin A.M. , Andreev Y.S. , Tretyakov S.D.
Published: May 2021

This paper studies deployable elements which are used in satellites and different terrestrial antenna devices. Many deployable elements are made from steel or thermoset polymer composite materials and have the following disadvantages like length limitation of deployable elements, labour intensity of manufacturing process of deployable elements etc. For this purpose a deployable tube boom element was chosen and a forming method for manufacturing deployable tube element from thermoplastic polymer composite material was developed.
Oxidative Degradation of Polyethylene Filled with Nanosized Crushed Shells of Sea Oysters
Authors: Akhmetshina Z. , Mastalygina E. , Pantyukhov P.
Published: May 2021

The work is devoted to the study of the effect of marine calcium carbonate on the polymer matrix. The composite flat strips based on low-density polyethylene filled by crushed shells of sea oysters, which are the main source of sea calcium, were investigated. Marine calcium carbonate masterbatch was used to reduce the cost and stiffen the resulting composite materials. The effect of the masterbatch concentration on mechanical properties and oxidative degradation were studied. The materials were exposed to three climatic factors (temperature, UV-radiation and moisture). The addition of crushed shells led to embrittlement of the test materials. According to FTIR analysis, the absorption band at 1432 cm-1 attributed to carbonate minerals decreased or completely disappeared after weathering test due to washing out of CaCO3 from the composite.
Evaluation of the Influence of the Conditions of Catalytic Continuous Steam Explosive Activation of Wood on the Physical and Operational Properties of Wooded Composite Materials Based on Activated Fibers
Authors: Prosvirnikov Dmitry B. , Safin R.R. , Kozlov R.R.
Published: May 2021

This article presents the results of studies of obtaining wood composite board materials without binders using the method of preliminary steam explosive treatment, as well as an assessment of the impact of impregnation conditions and continuous steam explosive activation of wood on the physical and operational properties of wood-based composite materials based on activated fibers. The rational operating parameters for obtaining board wood-composite materials (WCM) have been determined. We established the influence of impregnation modes (temperature, catalyst concentration), continuous steam explosive treatment with afterwash (temperature, pressure, intensity of mechanical action), as well as the properties of activated lignocellulose fibers (composition and morphological structure) on the operational properties of WCM. The expediency of introducing a catalyst (sodium bisulfite) at the washing stage has been proved, since the introduction of sodium bisulfite during impregnation before steam explosive treatment promotes the formation of lignosulfonates in the activated material, which participate in the formation of the physical properties of WCM.
Purification of Zinc Oxide from Chlorides Using Microwave Radiation
Authors: Ryazanov A.G. , Senin A.V. , Galimov D.M.
Published: May 2021

Waelz oxide is a secondary zinc raw material and a product of Electric Arc Furnaces (EAF) dust, copper smelters dust and zinc production residues. The use of Waelz oxide in the traditional RLE (Roasting-Leaching-Electrowinning) zinc production scheme requires the removal of halogens (fluorides and chlorides). Waelz oxide is mainly composed of zinc oxide, also contains zinc chloride. Zinc chloride is removed into the gas phase at heating. Microwave heating is one of the promising methods. Test experiments of microwave heating of a ZnO-ZnCl2 mixture were carried out. It was shown that zinc chloride absorbs microwave radiation; zinc oxide does not absorb microwave radiation. The degree of zinc chloride removal from ZnO-ZnCl2 mixture was 100%.
Modern Technologies of Metal Processing in the Socio-Cultural Context
Authors: Diaghileva T.V. , Sokolov R.A. , Novikov V.F. , Deneko M.V.
Published: May 2021

The study analyzes the specifics of modern metal processing technologies. The results of laboratory research for samples made from structural steel St3 with various heat treatment are presented. The results of mechanical tests, measurements of the relaxation coercive field force are shown. The processes that occur with the structure during heat treatment are studied and described. It is made by x-ray diffractograms and images obtained with raster electron and optical microscopes. The influence of structural changes on the relaxation coercive field force and mechanical parameters is described.
Mechanical and Corrosion Properties of VT6 Titanium Alloy after Irradiation with Helium and Aluminum Lons
Authors: Ovchinnikov Viktor V. , Yakutina Svetlana V. , Uchevatkina Nadezhda V.
Published: May 2021

The effect of high-dose aluminum implantation on the structural-phase state of the surface layer of titanium alloy VT6 with a fine structure (average grain size 2.3 μm) on the mechanical and corrosion properties has been investigated. It is shown that, as a result of ion irradiation, polyphase implanted layers based on α-titanium grains are formed, containing an intermetallic Ti3Al phase along the grain boundaries of α-titanium. The modified surface layers are characterized by improved mechanical properties and corrosion resistance. The noted effect is enhanced by the use of preliminary helium implantation with a dose of 1.3 × 1017ion / cm2.
Experimental and Analytical Assessment of the Power Parameters of the Combined Rolling-Extruding Process Using a Round Billet from Alloy 01417 Obtained Using an Electromagnetic Mold
Authors: Sidelnikov S. , Voroshilov D. , Motkov M. , Bespalov V. , Voroshilova M.
Published: May 2021

Analytical and experimental studies have been carried out, which made it possible to propose new technological modes of combined rolling-extruding for the production of rods from alloy 01417 for the further drawing of wire for electrical purposes. The force parameters on the rolls and the die are calculated when extruding a rod with a diameter of 5 mm on the laboratory unit CRE-200 and the industrial unit CRE-400. The obtained values of the forces on the rolls and the die do not exceed the permissible values of the power load of the units. Therefore the selected parameters are suitable for conducting experiments on the manufacture of prototypes of rods. To verify the conclusions made, experimental studies were carried out on the CRE-200 unit at a temperature of 320 oC and a drawing coefficient μ = 12.1. The results of experimental studies in comparison with the calculated data showed that the deviation of the calculated data does not exceed 15%.
Use of Bacterial Carbonatogenesis to Increase the Strength of Cement Solutions with the Help of Microorganisms
Authors: Beregovoi V.A. , Kapustin A.E. , Beregovoi A.M.
Published: May 2021

Influence of exometabolites of Bacillus cereus strain microorganism on cement mortar properties was studied. According to the strength criterion, the optimal dosages of the bioadditives and the order of its introduction into the solution are established. The description of the mechanism of formation of the effect of bio-cementation is given.
Building Systems Based on Foamed Modified Polymers
Authors: Bessonov Igor V. , Bogomolova L.K. , Zhukov Alexey D. , Zinoveva E.A.
Published: May 2021

Systems of floor insulation on the ground, isolation of roads and shallow foundations suggest the use of heat-insulating products resistant to moisture, the minerals contained in it, having low heat conductivity and water absorption and relatively high strength for compressive loads.The aim of the research was to study the possibility of using mineral substances containing crystalline water as a dispersed component. Firstly, such compounds as a reinforcing component increase the strength characteristics of products. Secondly, being flame retardants, they contribute to increasing the fire safety of materials and building systems in which these materials are used. To achieve this goal, two particular tasks were set: determination of the optimal consumption of mineral modifying additives; assessment of exploitative stability of the received products. It was found that the introduction of a mineral modifying additive can significantly increase the compressive strength by 10% deformation of samples from extruded polystyrene foam. The exploitative stability of products with a mineral additive varies slightly and depends on its consumption and uniform distribution in the product matrix. The effect of additive consumption on the change in the thermal conductivity of products has not been established. A nomogram has been built which allows one to evaluate the properties of products and determine the optimal consumption of a modifying additive.Systems of using products from modified extruded polystyrene foam in monolithic foundations with insulation for buildings erected on problem soils are considered.
Unused Plant Waste and Thermal Insulation Composition Boards on their Basis
Authors: Vachnina T.N. , Susoeva I.V. , Titunin A.A. , Tsybakin S.V.
Published: May 2021

Many plant wastes are not currently used in production, they are disposed of in landfills or incinerated. The aim of this study is to develop a composite thermal insulation material from unused spinning waste of flax and cotton fibers and soft wood waste. Samples of thermal insulation materials from plant waste were made by drying using the technology of production of soft wood fiber boards. For composite board defined physico-mechanical characteristics and thermal conductivity. The experiment was carried out according to a second-order plan, regression models of the dependences of the material indicators on the proportion of the binder additive, drying temperature and the proportion of wood waste additives were developed. The study showed that composites from unused spinning waste of plant fibers and soft wood waste have the necessary strength under static bending, the swelling in thickness after staying in water is much lower in comparison with the performance of boards from other plant fillers. The coefficient of thermal conductivity of the boards is comparable with the indicator for mineral wool boards.