bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengembangan Desa Wisata Berbasis Pemberdayaan Masyarakat Desa Wisata Kaki Langit Padukuhan Mangunan
Authors: Prihasta Anggit Kurnia , Suswanta Suswanta
Published: July 2020

Local tourism is currently developed such as Tourism Village development. Kaki Langit Tourism Village one of the tourism village that is currently developing and as a tourism village of Bantul Regency and special region of Yogyakarta. Kaki Langit Tourism Village uses the concept of community empowerment around Padukuhan Mangunan in which the tourism village stands. The natural beauty, cultural diversity, traditions and potential of the community have been the drive of the thriving Kaki Langit Tourism Village. Kaki Langit Tourism Village is developing. The community develops traditional culinary tourism, the lodging of Javanese rural concept, outbound tourism, and nature tourism. With the community being included directly today the community feels the impact of the economy with the additional income they can. This research uses qualitative descriptive methods. The result is that local tourism through the development of tourism village with Community Empowerment is able to bring economic impact to the community.

Keywords: Development of tourist village, community empowerment, and economic impact
Transiciones civilizatorias y crisis de la modernidad: ¿hacia una lectura emancipatoria del concepto de civilización? Algunas consideraciones iniciales
Authors: Duhart Daniel
Published: July 2020

El presente artículo construye un marco analítico para relacionar el concepto de civilización con la discusión sobre la crisis de la modernidad, en el contexto de la emergencia de los discursos de transición civilizatoria ante a los imperativos ecológicos y sociales de la crisis global, explorando las maneras en que podría ayudar a abordar de forma más comprehensiva algunos elementos de esta discusión sociológica, en particular la dicotomía tradición versus modernidad, así como entre las escuelas de pensamiento de las modernidades múltiples y el enfoque decolonial/poscolonial.
SAMPL7 TrimerTrip Host-Guest Binding Poses and Binding Affinities from Spherical-Coordinates-Biased Simulations
Authors: Sun Zhaoxi
Published: July 2020

Host-guest binding remains a major challenge in modern computational modelling. The newest 7th statistical assessment of the modeling of proteins and ligands (SAMPL) challenge contains a new series of host-guest systems. The TrimerTrip host binds to 16 structurally diverse guests. Previously, we have successfully employed the spherical coordinates as the collective variables coupled with the enhanced sampling technique metadynamics to enhance the sampling of the binding/unbinding event, search for possible binding poses and predict the binding affinities in all three host-guest binding cases of the 6th SAMPL challenge. In this work, we employed the same protocol to investigate the TrimerTrip host in the SAMPL7 challenge. As no binding pose is provided by the SAMPL7 host, our simulations initiate from randomly selected configurations and are proceeded long enough to obtain converged free energy estimates and search for possible binding poses. The predicted binding affinities are in good agreement with the experimental reference, and the obtained binding poses serve as a nice starting point for end-point or alchemical free energy calculations.
Strain-Based Chemical Sensing Using Metal-Organic Framework Nanoparticles
Authors: Yeung Hamish , Yoshikawa Genki , Minami Kosuke , Shiba Kota
Published: July 2020

Metal-organic frameworks (MOFs) have received much attention for their potential as chemical sensors, owing to unparalleled tunability of their host-guest response, high uptake and structural flexibility. However, because of the limited compatibility between MOF properties and sensor transduction mechanisms, very few MOFs have successfully been integrated into practical devices. We report the fabrication of the first strain-based sensor constructed from MOF nanoparticles deposited directly onto a membrane-type surface stress sensing architecture, which exhibits unprecedented response times on the order of seconds and ppm-level sensitivity towards volatile organic compounds (VOCs). Finite element analysis is used to demonstrate that the sensor response is a result of analyte-induced strain in the MOF receptor layer. We show that an array of four types of MOF nanoparticles allows for clear discrimination between different classes of VOCs and even individual gases, using principal component analysis of their response profiles. This work opens up the possibility of VOC sensing using a wide range of MOFs, beyond those that are electrically conducting or those that form oriented thin films, with the added advantages of high sensitivity and rapid response compared to existing MOF strain-based sensors.
Simultaneous Suppression of pi- and sigma- Transmission in pi-Conjugated Molecules
Authors: Garner Marc Hamilton , Solomon Gemma C.
Published: July 2020

Molecular dielectric materials require ostensibly conflicting requirements of high polarizability and low conductivity. As previous efforts towards molecular insulators focused on saturated molecules, it remains an open question whether pi- and sigma-transport can be simultaneously suppressed in conjugated systems. Here, we demonstrate that there are conjugated molecules where the sigma-transmission is suppressed by destructive sigma-interference, while the pi-transmission can be suppressed by a localized disruption of conjugation. Using density functional theory, we study the Landauer transmission and ballistic current density, which allow us to determine how the transmission is affected by various structural changes in the molecule. We find that in para-linked oligophenyl rings the sigma-transmission can be suppressed by changing the remaining hydrogens to methyl groups due to the inherent gauche-like structure of the carbon backbone within a benzene ring, similar to what was previously seen in saturated systems. At the same time, the methyl groups fulfil a dual purpose as they modulate the twist angle between neighboring phenyl rings. When neighboring rings are orthogonal to each other, the transmission through both pi- and sigma-systems is effectively suppressed. Alternatively, breaking conjugation in a single phenyl ring by saturating two carbons atoms with two methyl substituents on each carbon, results in suppressed pi- and sigma-transport independent of dihedral angle. These two strategies demonstrate that methyl-substituted oligophenyls are promising candidates for the development of molecular dielectric materials.
Rapid Detection of Strong Correlation with Machine Learning for Transition Metal Complex High-Throughput Screening
Authors: Liu Fang , Duan Chenru , Kulik Heather
Published: July 2020

Despite its widespread use in chemical discovery, approximate density functional theory (DFT) is poorly suited to many targets, such as those containing open-shell, 3d transition metals that can be expected to have strong multi-reference (MR) character. For discovery workflows to be predictive, we need automated, low-cost methods that can distinguish the regions of chemical space where DFT should be applied from those where it should not. We curate over 4,800 open-shell transition-metal complexes up to hundreds of atoms in size from prior high-throughput DFT studies and evaluate affordable, finite-temperature DFT evaluation of fractional occupation number (FON)-based MR diagnostics. We show that intuitive measures of strong correlation (i.e., the HOMO–LUMO gap) are not predictive of MR character as judged by FON-based diagnostics. Analysis of independently trained machine learning (ML) models to predict HOMO–LUMO gaps and FON-based diagnostics reveals differences in metal- and ligand-sensitivity of the two quantities. We use our trained ML models to rapidly evaluate MR character over a space of ca. 187,000 theoretical complexes, identifying large-scale trends in spin-state-dependent MR character and finding small HOMO–LUMO gap complexes while ensuring low MR character.
Fick Diffusion Coefficients via Molecular Dynamics: An Alternative Approach in the Fourier Domain
Authors: Pinheiro dos Santos Thiago José , Tavares Frederico W. , Abreu Charlles
Published: July 2020

Mutual diffusion coefficient data are required for several systems of scientific and engineering interest to properly describe mass transport phenomena over a wide range of pressures, temperatures, and compositions. In this work, we calculated Fick diffusion coefficients for some CO2+n-alkane mixtures at high pressures using a new method, which we derived by introducing modifications to the Fourier Correlation Method (FCM) originally proposed by Nichols and Wheeler [I&EC Research, 54, 12156–12164 (2015)]. The modified FCM (mFCM) results were validated through comparisons with experimental data and with Fick coefficients calculated by employing well-established Molecular Dynamics methodologies. The new approach has some interesting advantages, such as providing Fick coefficients for molecular systems directly through a single equilibrium calculation, in contrast to traditional methods in which an extra calculation is needed to obtain the so-called thermodynamic factor. It is shown that the new approach considerably reduces the finite-size effect of the simulation box on the calculated diffusion coefficients, which are thus obtained in the thermodynamic limit.
DNA Aptamers Block the Receptor Binding Domain at the Spike Protein of SARS-CoV-2
Authors: Cleri Fabrizio , Lensink Marc F. , Blossey Ralf
Published: July 2020

DNA aptamers are versatile molecular species obtained by the folding of short single-stranded nucleotide sequences, with highly specific recognition capabilities against proteins. Here we test the ability of selected DNA aptamers in interacting with the spike (S-)protein of the SARS-CoV-2 viral capsid. The S-protein, a trimer made up of several subdomains, develops the crucial function of recognizing the ACE2 receptors on the surface of human cells, and sub- sequent fusioning of the virus membrane with the host cell membrane. In order to do this, the S1 domain of one protomer switches between a closed conformation, in which the binding site is inaccessible to the cell receptors, and an open conformation, in which ACE2 can bind, thereby initiating the entry process of the viral genetic material in the host cell. Here we show by means of state-of-the-art molecular simulations that small DNA aptamers can recognize the S-protein of SARS-CoV-2. Moreover, their interaction with different regions of the S-protein can effectively block, or at least considerably slow down the opening process of the S1 domain, thereby largely reducing the probability of virus-cell binding. We also provide evidence that binding of the human ACE2 receptor may be drastically affected under such conditions. Given the facility and low cost of fabrication of specific aptamers, the present findings could open the way to both an innovative viral screening technique with sub-nanomolar sensitivity, and to an effective and low impact curative strategy.
Synthesis of Anthradithiophene Containing Conjugated Polymers via a Cross-coupling Strategy
Authors: Hussain Waseem A. , Plunkett Kyle
Published: July 2020

New conjugated polymers that incorporate dihexylanthradithiophene (DHADT) in the main chain were prepared by Stille and Sonogashira cross-coupling polymerization reactions. The polymerization chemistry is enabled by a soluble 5,11-dibromodihexylanthradithiophene monomer that is capable of cross-coupling reactions. Four readily soluble DHADT containing co-polymers were prepared and characterized experimentally and computationally. These polymers possess HOMO energies of -5.18 eV to -5.43 eV and LUMO energies of -3.0 eV to -2.82 eV. The notable optical features include broad absorption and band gaps ranging from 1.62 eV to 2.15 eV.
A Synergy Between Push-Pull Electronic Effect and Twisted Conformation for High-Contrast Mechanochromic AIEgens
Authors: Wang Xiaoxuan , Qi Chunxuan , Fu Zhiyuan , Zhang Haoke , Wang Jianguo , Feng Hai-Tao , Wang Kai , Zou Bo , Lam Jacky W. Y. , Tang Ben Zhong
Published: July 2020

Mechanochromic (MC) luminogens in response to external stimulus have shown promising applications as pressure sensors and memory devices. While, research on their underlying mechanism is still in the initial stage. Here, three pyridinium-functionalized tetraphenylethylenes bearing n-pentyloxy group, hydrogen, nitro group, namely TPE-OP, TPE-H and TPE-NO, are designed to systematically investigate the influence of push-pull electronic effect and molecular conformation on MC luminescence. Upon anisotropic grinding and isotropic hydrostatic compression, TPE-OP with strong intramolecular charge transfer (ICT) affords the best MC behavior among them. Analysis of three polymorphs of TPE-H clearly indicates that planarization of molecular conformation is responsible for their bathochromic shift under mechanical stimuli. Theoretical calculations also verify that high twisting stress of AIEgens can be released under high pressure. This study presents a clear picture for MC behaviour and proposes an effective strategy to achieve high-contrast MC luminescence.
Molecular Basis of Iterative C–H Oxidation by TamI, a Multifunctional P450 Monooxygenase from the Tirandamycin Biosynthetic Pathway
Authors: Newmister Sean A. , Srivastava Kinshuk Raj , Espinoza Rosa V. , Caddell Haatveit Kersti , Khatri Yogan , Martini Rachel M. , Garcia-Borràs Marc , Podust Larissa M. , Houk Kendall N , Sherman David H.
Published: July 2020

Biocatalysis offers an expanding and powerful strategy to construct and diversify complex molecules by C-H bond functionalization. Due to their high selectivity, enzymes have become an essential tool for C-H bond functionalization and offer complementary reactivity to small-molecule catalysts. Hemoproteins, particularly cytochromes P450, have proven effective for selective oxidation of unactivated C-H bonds. Previously, we reported the in vitro characterization of an oxidative tailoring cascade in which TamI, a multifunctional P450 functions co-dependently with the TamL flavoprotein to catalyze regio- and stereoselective hydroxylations and epoxidation to yield tirandamycin A and tirandamycin B. TamI follows a defined order including 1) C10 hydroxylation, 2) C11/C12 epoxidation, and 3) C18 hydroxylation. Here we present a structural, biochemical, and computational investigation of TamI to understand the molecular basis of its substrate binding, diverse reactivity, and specific reaction sequence. The crystal structure of TamI in complex with tirandamycin C together with molecular dynamics simulations and targeted mutagenesis suggest that hydrophobic interactions with the polyene chain of its natural substrate are critical for molecular recognition. QM/MM calculations and molecular dynamics simulations of TamI with variant substrates provided detailed information on the molecular basis of sequential reactivity, and pattern of regio- and stereo-selectivity in catalyzing the three-step oxidative cascade.
Water-Involved Methane Selective Catalytic Oxidation by Dioxygen over Copper-Zeolites
Authors: Sun Lanlan , Wang Yu , Wang Chuanming , Xie Zaiku , Guan Naijia , Li Landong
Published: July 2020

The selective oxidation of methane to methanol is a dream reaction of direct methane functionalization, which remains a key challenge in catalysis and a hot issue of controversy. Herein, we report the water-involved methane selective catalytic oxidation by dioxygen over copper-zeolites. At 573 K, a state-of-the-art methanol space-time yield of 543 mmol/molCu/h with methanol selectivity of 91 % is achieved with Cu-CHA catalyst. Temperature-programmed surface reactions with isotope labelling determine water as the dominating oxygen and hydrogen source of hydroxyl in methanol while dioxygen participates in the reaction through reducing to water. Spectroscopic analyses reveal the fast redox cycle of Cu2+-Cu+-Cu2+ during methane selective oxidation, which is closely related to the high catalytic activity of Cu-CHA. Density functional theory calculations suggest that both CuOH monomer and dimer in Cu-CHA can catalyze the selective oxidation of methane to methanol with Cu-OOH as the key reaction intermediate, and meanwhile, various copper sites undergo interconversion under reaction conditions.
Synthetic Spider Silk Provides New Insights into the Mechanisms of Flagelliform Silk Fiber Assemble and Elastomeric Behavior
Authors: Bittencourt Daniela , Oliveira Paula F. , Souto Betulia M. , Maria de Freitas Sonia , Michalczechen-Lacerda Valquiria , Murad André M. , Paulino Silva Luciano , Lewis Randolph V. , Rech Elibio
Published: July 2020

In order to better understand the relationship between the elastomeric behavior of Flagelliform (Flag) spider silks and its molecular structure, it was designed and produced the Nephilengys cruentata Flageliform (Flag) spidroin analogue rNcFlag2222. The recombinant proteins are composed by the elastic repetitive glycine-rich motifs (GPGGX/GGX) and the spacer region, rich in hydrophilic charged amino acids, present at the native silk spidroin. Using different approaches for nanomolecular protein analysis, the structural data of rNcFlag2222 recombinant proteins were compared in its fibrillar and in its fully solvated states. Based on the results and previous published data, it was possible to propose a model for the molecular dynamics of Flag spidroins’ repetitive core, during gland storage and fiber formation, and their contribution to its exceptional mechanoelastic properties. This model assumes that the Flag silk proteins acquire elastomeric behavior through a mechanism similar to collagen proteins, with the repetitive glycine-rich and the spacer regions, together with water, playing important roles in fiber assemble and elastomeric behavior.
Repurposing Nonnucleoside Antivirals Against SARS-CoV2 NSP12 (RNA Dependent RNA Polymerase) and Identification of Domain Specific Interactions
Authors: Begum Feroza , RAY UPASANA
Published: July 2020

The pandemic of SARS-CoV-2 has necessitated expedited research efforts towards finding potential antiviral targets and drug development measures. While new drug discovery is time consuming, drug repurposing has been a promising area for elaborate virtual screening and identification of existing FDA approved drugs that could possibly be used for targeting against functions of various proteins of SARS-CoV-2 virus. RNA dependent RNA polymerase (RdRp) is an important enzyme for the virus that mediates replication of the viral RNA. Inhibition of RdRp could inhibit viral RNA replication and thus new virus particle production. Here, we screened non-nucleoside antivirals and found three out of them to be strongest in binding to RdRp. We propose these three drugs as potential RdRp inhibitors based on the site of binding.
Spatiotemporal Formation Kinetics of Polyelectrolyte Complex Micelles with Millisecond Resolution
Authors: Wu Hao , Ting Jeffrey , Yu Boyuan , Jackson Nicholas , Meng Siqi , de Pablo Juan , Tirrell Matthew
Published: July 2020

We have directly observed the in situ self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. A synthesized neutral-charged diblock polycation and homopolyanion that we have previously investigated as a model charge-matched, core-shell micelle system were selected for this work. The initial micellization of the oppositely charged polyelectrolytes was completed within the dead time of mixing of 100 ms, followed by micelle growth and equilibration up to several seconds. By combining the structural evolution of the radius of gyration (Rg) and aggregation number (N) with complementary molecular dynamics simulations, we develop new information on how the self-assemblies evolve incrementally in size over time through a two-step kinetic process: first, oppositely-charged polyelectrolyte chains pair to form nascent aggregates that immediately assemble into spherical micelles, and second, these PEC micelles grow into larger micellar entities. This work has determined one possible kinetic pathway for the initial formation of PEC micelles, which provides useful physical insights for increasing fundamental understanding self-assembly dynamics driven by polyelectrolyte complexation that occur on ultrafast timescales.
A EFETIVIDADE DE DIREITOS FUNDAMENTAIS TRABALHISTAS DELIMITANDO A FORMA DE PAGAMENTO NO TRABALHO INTERMITENTE
Authors: Romar Carla Teresa Martins , Cioffi Leandro
Published: July 2020

Estudo teórico, bibliográfico e método dedutivo que aborda o tema da forma de pagamento da contraprestação dos serviços prestados no trabalho intermitente, cujo problema consiste na questão da regra dessa forma de pagamento em face aos ditames constitucionais na perspectiva de efetividade de direitos fundamentais trabalhistas, contendo conclusão no sentido de que o trabalho intermitente sofre limites constitucionais na aplicação de suas regras dadas pela Reforma Trabalhista, especialmente para a garantia do recebimento mensal igual ou superior ao salário mínimo, da vedação de pagamento das férias e do décimo terceiro salário fragmentados juntamente com as remunerações pagas logo após a prestação de cada serviço intermitente.
Mata ciliar, erosão e assoreamento: construindo saberes de forma lúdica
Authors: Pereira Thayná Machado , Fonseca Diogo Barros de Faria , Ribeiro Matheus Benásio , Almeida Marcelo Nocelle de
Published: July 2020

O meio ambiente é um recurso heterogêneo que deve ser tratado e estudado também de forma heterogênea. Os objetivos desse trabalho foram: construir uma maquete que simula a erosão e o assoreamento em corpos d’água após a retirada da mata ciliar, e construir um jogo didático para aprofundar o conhecimento acerca do tema proposto. Esse trabalho buscou envolver os participantes na discussão de questões sociais, políticas e econômicas que contribuem para a degradação/preservação ambiental. Os resultados obtidos com ambos os recursos foram satisfatórios, pois os alunos puderam observar de forma tridimensional o que as ações humanas têm provocado no ambiente, além de discutirem suas consequências e ações que podem minimizar os seus efeitos. A adequação da abordagem permite que a metodologia seja utilizada em qualquer ciclo de ensino, desde o fundamental até a formação continuada de professores.
Uma análise dos conteúdos conceituais presentes no ensino de derivadas
Authors: Silva José Roberto Damasceno da
Published: July 2020

O ensino de derivadas apresenta uma série de obstáculos que acabam por dificultar a sua efetiva aplicação nas aulas de Cálculo. Na maioria das vezes, os docentes priorizam o ensino apenas da definição de derivada, não levando em consideração a aplicação de estratégias que visam à mobilização da natureza procedimental e atitudinal dos conteúdos, excluindo as contribuições que esses fornecem para a formação integral dos aprendizes. Assim, esse trabalho evidencia uma análise dos conteúdos conceituais presentes no ensino de derivadas em três artigos do Bolema (Boletim de Educação Matemática), objetivando destacar as categorias procedimentais e atitudinais, além das conceituais, baseadas nos pressupostos de POZO e CRESPO (2009). A compreensão dessas categorias e de suas interelações podem tornar esse conteúdo mais concreto para sua efetiva aplicação nas aulas de Cálculo.

Palavras-chaves: Conteúdos conceituais, procedimentais e atitudinais. Derivadas.
Ensino de Ciências, alfabetização científica e tecnológica e enfoque Ciência, Tecnologia e Sociedade: o que pensam docentes dos anos iniciais do ensino fundamental em exercício
Authors: Silveira Rosemari Monteiro Castilho  Foggiatto , Fabri Fabiane
Published: July 2020

O objetivo desse artigo é apresentar um levantamento sobre as concepções dos professores que atuam na Rede Municipal de Ensino da cidade de Ponta Grossa- Pr em relação ao Ensino de Ciências, enfoque CTS (Ciência, Tecnologia e Sociedade) e sobre Alfabetização Científica e Tecnológica (ACT). A abordagem metodológica foi à quantitativa, cujo instrumento de coleta de dados foi um questionário composto por perguntas abertas e fechadas. Foi possível perceber que um número preocupante 80%, nunca fizeram cursos de formações continuadas na área de ciências. No que tange ao conhecimento do enfoque CTS 40% nunca ouviu falar e nem utiliza em suas aulas, a maioria 55% afirmou ter ouvido falar, ou por leitura, participação em oficinas e palestras. Todavia, destes poucos foram os que mostraram ter uma visão mais adequada do que seria o enfoque CTS. Salienta-se que esses são dados que serviram de subsídios para o desenvolvimento de uma FC na área de ciências com enfoque CTS na forma de projeto de extensão do PPGECT/UTFPR-PG em parceria com a Secretaria Municipal de Educação da cidade de Ponta Grossa – Pr, a qual foi foco da pesquisa para a tese de doutorado do Programa de Pós Graduação em Ensino de Ciência e Tecnologia
disciplina de estágio curricular na licenciatura em Ciências Exatas como espaço de reflexões sobre os modelos didáticos na formação docente
Authors: Bartelmebs Roberta Chiesa
Published: July 2020

Neste trabalho apresentamos uma pesquisa realizada sobre os Modelos Didáticos e a formação inicial docente. As atividades foram aplicadas em uma turma de Licenciatura em Ciências Exatas na disciplina de Estágio Supervisionado Escolar Específico da Universidade XXX. Para o desenvolvimento da disciplina utilizamos os conceitos de problema prático profissional (PPP) e Modelos Didáticos, todos derivados do projeto Inovação e Renovação Escolar (IRES) da Universidade de Sevilha/ES. Ao longo das 18 semanas de aulas os licenciandos realizaram diferentes atividades teórico-reflexiva com o intuito de repensarem a prática docente de forma crítica e criativa. Com o uso sistemático do diário de campo, os licenciandos realizaram suas reflexões acerca de textos, planejamentos de aula, observações e atividades de grupo. Foi possível identificar um significativo crescimento dos alunos com relação as suas concepções acerca do ensino e da aprendizagem de Ciências.
Mapeamento de objetos de aprendizagem para o ensino de números complexos na engenharia elétrica
Authors: Puhl Cassiano Scott , Müller Thaísa Jacintho , Lara Isabel Cristina Machado de
Published: July 2020

Este artigo apresenta um mapeamento teórico de pesquisas brasileiras sobre objetos de aprendizagem para o ensino de Números Complexos no Ensino Superior, buscando estudos aplicados na área da Engenharia Elétrica. O objetivo é identificar o estado do conhecimento de pesquisas sobre objetos de aprendizagem para o ensino de Números Complexos no Ensino Superior, conhecendo os recursos disponíveis, verificando as diferentes concepções, teorias educacionais e metodologias de pesquisa. A partir de consultas ao Banco de Teses disponibilizado pela Coordenação de Aperfeiçoamento de Pessoal de Nível Superior foi realizado o mapeamento, encontrando-se 185 dissertações/teses sobre números complexos. Em virtude da quantidade de dissertações/teses, delimitou-se a busca para as que envolviam Tecnologias ou Engenharia ou Ensino Superior, tendo uma pré-seleção de 24 pesquisas. Em continuidade, foram selecionadas treze pesquisas, a partir da leitura dos resumos, em especial as que abordaram o ensino e/ou a aplicação dos números complexos, por meio de recursos digitais, na área da Elétrica. Na análise constatou-se a existência de poucos objetos de aprendizagem para o ensino de Números Complexos, sendo que a maioria é destinado ao Ensino Médio, mas que apresentam indicativos que qualificam o processo de aprendizagem. Além disso, as teorias de aprendizagem têm sido pouco utilizadas como fundamentação nas pesquisas. Portanto, conclui-se que o processo de ensino de Números Complexos não está sendo investigado no Ensino Superior e da inexistência de um objeto de aprendizagem que propicie a compreensão dos conceitos e operações com números complexos para os acadêmicos de Engenharia Elétrica pode ser considerada inédita.
Simulação de energia fotovoltaica: uma sequência didática alternativa para o ensino da eletrodinâmica
Authors: Neto Pedro Alves Fontes , Moura Francisco Antonio Gudemberg Almeida , Ribeiro Gyulianna Pinheiro
Published: July 2020

O ensino da eletrodinâmica, mais precisamente geradores e receptores, fazem parte dos conteúdos ministrados na 3ª série do Ensino Médio nas aulas de Física. Para melhor compreensão sobre a produção de energia elétrica, este trabalho objetivou a aplicação de uma sequência didática (SD) através de simulações em plataformas nacionais e internacionais, com as quais verificou-se a viabilidade da implantação de sistemas fotovoltaicos (SFVs) em escolas da cidade de Bacabal - MA. Utilizou-se uma metodologia qualitativa e quantitativa num estudo de caso, cujos resultados são demonstrados com: o cálculo do consumo de aparelhos eletrônicos, uma comparação do consumo de eletricidade com e sem os SFVs, a energia gerada para suprir as demandas das escolas versus as suas capacidades de geração, o custo benefício para os próximos 25 anos e do tempo de retorno do investimento. Bem como, a contribuição para a preservação do meio ambiente com a não emissão de dióxido de carbono (CO2).
Contrastive Study of Chinese and Indonesian Passive Sentences
Authors: Sakti Karina Fefi Laksana , Sunarti Sunarti , Ventivani Aiga
Published: July 2020

The purpose of this study was to compare Chinese and Indonesian passive sentences. This article belongs to the description of qualitative research. The research methods used in this paper are description and contrastive analysis method.  The data source of this research is the Chinese and Indonesian references. The data of this research are in the form of descriptions of Mandarin passive sentences and Indonesian passive sentences. Data collection techniques in this research is to collect data relevant to research from various sources then arranged, analyzed, and drawn conclusions. First of all, describe the syntactic structures of Chinese and ndonesian passive sentences. Then comparing the syntactic structures of Chinese and ndonesian passive sentences to find out the difference of syntactic structures between Chinese and Indonesian passive sentences. The same point between Chinese and Indonesian passive syntactic structures is that both languages can change from active sentences to passive sentences, and sometimes there is no promoter. The difference between Chinese and Indonesian passive sentences lies in the position of the promoter; the morphology of predicate verb of Chinese passive sentences and Chinese active sentences are same, while the morphology of predicate verb of Indonesian Passive Sentences active sentences is different; and passive sentences in Indonesian can carry single verb. The predicate verb of the passive sentence in Chinese cannot be a single verb.
PHYTOCHEMICAL SCREENING AND NUTRIENT CONTENT ANALYSIS OF STEM AND ROOT OF TRIDAX PROCUMBENS LINN
Authors: Bharathi Thiyagarajan , Udayakumar Rajangam
Published: July 2020

The medicinal plant Tridax procumbens belongs to the family of Asteraceae was selected for this study based on medicinal value. It was collected from the campus of Government Arts College (Autonomous), Kumbakonam - 612 002, Tamilnadu, India during the months between March and June 2017. The stem and root of Tridax procumbens were separated, cleaned and dried under shade. The dried plant materials were then ground well into powder. The 20g of powder of stem and root was soaked in 200ml of benzene and diethyl ether individually and they were kept at room temperature for 48 hours. After that, the mixture was filtered through a clean muslin cloth and the extracts were concentrated using evaporator at 37˚C till the sticky mass was obtained. The phytocompounds alkaloids, flavonoids, saponins, terpenoids, phenolic compounds, tannins, triterpenoids, steroids, quinones, glycosides and coumarins were analysed in benzene and diethyl ether extracts of stem and root of Tridax procumbens by qualitatively. Phytochemical screening showed that the presence of all above mentioned phytocompounds in benzene and diethyl ether extracts of stem and root of Tridax procumbens except steroids, saponins and glycosides. The content of carbohydrates, protein and vitamin C in the fresh sample of stem and root were analysed by quantitatively.
THE CONSEQUENCES OF EROSION ON THE SLOPE LANDS OF AZERBAIJAN AND MEASURES TO COMBAT IT
Authors: Aliyev RANS Z.H.
Published: July 2020

The article considers the probability of the intensity of the erosion process and the prerequisites for its mitigation and control. The results of the research prove that soil erosion is based on natural and anthropogenic factors. The main objectives of the study were to determine the amount and level of development of worn and erosion-prone soils in the foothills of the country, where it is very difficult to develop on the slope soils of Upper Shirvani. Therefore, in this connection, the tasks are solved, taking into account the requirements of preserving the ecological situation in the example of the Shamakhi district of the Upper Shirvan zone of the Republic of Azerbaijan, where the areas of its potential danger are identified and the preconditions for its prevention are given.
THE USE OF MODAL AUXILIARY VERBS IN REPORTING COVID-19: A STUDY OF SELECTED ARTICLES DAILY NATION NEWSPAPER
Authors: Odhiambo Kenneth , Odhiambo Owala Silas
Published: July 2020

This article analyses the uses of modal auxiliary verbs in reporting Covid-19 in selected articles in Daily Nation newspaper. Covid-19 is a member of the beta coronaviruses that can cause acute severe respiratory symptoms or possibly mild, cold-like symptoms. The reporting of the disease was done in the newspaper in Kenya every day from the first time it was reported in the country on 13th March 2020. The articles analyzed were purposively selected from articles in Daily Nation newspaper and analyzed using insights from Quirk et al’s (2000) dichotomy of modal auxiliary verbs. The data was analyzed manually with regard to different functions of the modal auxiliary verbs in question. Six categories of modal auxiliaries namely; Ability, possibility, prediction, obligation, intention and quasi-legal modals characterized the data. Findings indicate that the authors of the articles chose predictive auxiliary modals will, may, can and should in that order in the articles. Other types of modal used are would, must and might. The modals used presented the opinions of the article writers and the use of will reported the highest frequency.
As máquinas inteligentes e o impacto sobre os empregos
Authors: Dias Sales Ana Patricia , Lima Sales Francisco José
Published: July 2020

O estudo é parte de uma pesquisa maior sobre a dinâmica do mercado de trabalho na cidade do Natal/RN, no entanto, a análise aqui desenvolvida circunscreve-se ao setor supermercadista. O objetivo é analisar os impactos não somente da adoção das máquinas inteligentes, os Self-Checkouts, sobre o trabalho dos operadores de caixa de supermercados, bem como das relações de trabalho, e demarcar a compreensão deles sobre a Quarta Revolução Industrial. A pesquisa tem como período referencial o ano de 2018 e se embasa em dados primários e secundários. Constata-se que a falta de conhecimento dos trabalhadores de supermercados no tocante à Revolução 4.0 os faz acreditarem que as novas tecnologias não são poupadoras do trabalho vivo e, por conseguinte, não afetarão seus empregos e muito menos provocarão desemprego.
Crise ambiental e sociedade de risco: o paradigma das alterações climáticas diante do direito ambiental e da sustentabilidade
Authors: Arruda Danilo Barbosa de , Cunha Belinda Pereira da , Milioli Geraldo
Published: July 2020

A urgência da crise ambiental e suas implicações ensejam a humanidade a repensar a sociedade de risco. Os objetivos deste manuscrito visam compreender e questionar o paradigma das alterações climáticas no semiárido nordestino. A metodologia utilizada é a bibliográfica e dedutiva, pois faz uma incursão teórica em autores internacionais e nacionais que corroboram com a análise conceitual do artigo. As conquistas sociais e os direitos já garantidos estão em constante ameaça com a transformação rápida advinda das extenuantes e inesperadas mudanças socioclimáticas. Os principais resultados encontrados foram a constatação do prejuízo socioambiental e os impactos das alterações climáticas resultantes das atividades humanas, assim como a insustentabilidade do uso intensivo dos recursos naturais da Caatinga.  

Palavras chave: Mudanças climáticas, crise civilizatória, insustentabilidade, racionalidade ambiental, reflexão ambiental.
Crenças de autoeficácia e estratégias de aprendizagem: um estudo de caso dos ingressantes no curso de Licenciatura em Física
Authors: Rocha Diego Marceli
Published: July 2020

A etapa de ingresso dos estudantes nos cursos de licenciatura é uma fase de relevante análise a respeito dos processos que gerenciam as estratégias de aprendizagem dos futuros professores. A fim de compreendermos os fatores que se relacionam com as estratégias de aprendizagem dos alunos e com seu desempenho acadêmico, é que escolhemos as crenças de autoeficácia, propostas por Albert Bandura (1986), como constructo teórico para estudarmos tais relações, logo na etapa de ingresso dos estudantes no curso de licenciatura em Física. Assim, por meio de uma pesquisa qualitativa, em um estudo de caso, realizamos entrevistas, em momentos distintos do ingresso, de três alunos do curso de licenciatura em Física do Centro de Formação de Professores da Universidade Federal de Campina Grande (CFP/UFCG). O estudo revelou um incremento no nível de autoeficácia desses estudantes na passagem do primeiro para o segundo período do curso. Esse aumento em seus níveis de autoeficácia resultou em diferentes estratégias de aprendizagem que, por sua vez, possibilitaram um melhor desempenho acadêmico nessa fase do curso de graduação.  

Palavras chave: Autoeficácia, Licenciatura em Física, desempenho acadêmico, estratégias de aprendizagem.
The Effect of Work-Family Conflict and Balancing Strategy towards Wive's Job Satisfaction
Authors: Sunarti Euis , Rizkillah Risda , Muktiyah Novy Tri
Published: July 2020

This study aims to analyze the effects of work-family conflicts and balancing strategies on job satisfaction felt by families in working husbands and wives. The design of this study was cross-sectional with a sample of 160 wives in families with working wives who have children aged 0-9 years chosen stratified non-proportional random sampling in West Bogor and Central Bogor District, Bogor City. The data collection process carried out using a questionnaire. This study's results indicate that there is a significant negative correlation between work-family conflict and job satisfaction. Besides, theBesidesnificant positive correlation between the strategy of balancing family and work with job satisfaction. Based on the results of the regression test, the data show that work-family conflict and the balancing strategy have an effect on job satisfaction 22.2 percent, and the rest is influenced by other variables not examined. The implications of these results require a broader study for the elaboration of wives' job satisfaction factors.
Eskalasi Keterampilan Menulis Siswa Menggunakan Media Gambar Seri dengan Model Pembelajaran Kooperatif Tipe Think Pair Write
Authors: Pardiansyah Tri
Published: July 2020

Eskalasi sebagai pendekatan dalam meningkatan keterampilan seseorang, khususnya dalam penguasaan berbahasa dalam bentuk tulisan, merupakan hal baru yang perlu diperhatikan. Penelitian ini memanfaatkan media gambar seri dan model  pembelajaran  kooperatif tipe think pair write yang bertujuan untuk meningkatkan kualitas keterampilan seseorang khususnya dalam menulis.  Metode penelitian yang digunakan adalah metode deskriptif dengan prosedur pelaksanaan penelitian tindakan kelas dalam bentuk siklus dan setiap siklus terdiri atas empat tahap yaitu tahap perencanaan (planning), tahap pelaksanaan (acting), tahap pengamatan (observing), dan tahap refleksi (reflecting) yang dilakukan. Teknik pengumpulan data penelitian ini menggunakan lembar observasi dan lembar tes. Hasil penelitian ini menunjukkan bahwa media gambar seri dengan model pembelajaran Think Pair Write dapat mengeskalasikan keterampilan menulis siswa khususnya pada keterampilan menulis sebuah karangan. Di mana pada pelaksanaan siklus I, siklus II dan II terjadi eskalasi keterampilan menulis dengan kategori sangat baik
Upaya Meningkatkan Aktivitas dan Hasil Belajar Fisika Siswa Menggunakan Model Pembelajaran Quching
Authors: Multazam Muhammad
Published: July 2020

Penelitian tindakan kelas ini bertujuan untuk meningkatkan aktivitas dan hasil belajar fisika siswa kelas X-MIPA-2 SMA Negeri 4 Praya dengan menggunakan model pembelajaran Quantum Teaching (Quching) pada materi Gerak Lurus. Penelitian ini dilaksanakan dalam tiga siklus yaitu siklus I, siklus II, dan siklus III. Tiap siklus terdiri dari perencanaan tindakan, pelaksanaan tindakan, observasi, dan refleksi. Instrumen yang digunakan adalah lembar observasi aktivitas siswa, lembar observasi kegiatan guru, dan tes hasil belajar dengan soal pilihan ganda. Teknik analisis data yang digunakan yaitu analisis data deskriptif kuantitatif dan kualitatif. Hasil penelitian menunjukkan adanya peningkatan aktivitas dan hasil belajar fisika siswa pada tiap siklus. Pada siklus I, pembelajaran siswa belum berjalan dengan baik sehingga hasil belajar siswa masih rendah yaitu 66,12 dengan jumlah siswa yang berhasil sebanyak 15 orang dan rata-rata aktivitas yang diperoleh seluruh siswa adalah 48,10%. Hal ini disebabkan karena guru belum sepenuhnya menguasai model pembelajaran. Pada siklus II nilai rata-rata hasil belajar 77,2 dan rata-rata persentase aktivitas siswa meningkat menjadi 61,66% dan dengan jumlah siswa yang berhasil sebanyak 18 orang. Pada siklus III nilai rata-rata hasil belajar 81,00 dan rata-rata persentase aktivitas siswa meningkat menjadi 73,56% dengan jumlah siswa yang berhasil sebanyak 29 orang. Berdasarkan hasil yang diperoleh dalam penelitian dapat disimpulkan bahwa dengan menggunakan model pembelajaran Quantum Teaching dapat meningkatkan nilai hasil belajar fisika dan aktivitas siswa di kelas X-MIPA-2.
ANALISIS BUTIR SOAL ULA NGAN AKHIR SEMESTER GASAL MATA PELAJARAN MATEMATIKA KELAS VIII SMP K LASTER 1 KABUPATEN BANYUMAS BERDASARKAN TAKSONOMI BLOOM DUA DIMENSI
Authors: Afriani Desi , Kusno Kusno
Published: July 2020

This research aims to describe the composition of cognitive process and knowledge dimension of the item analysis of even final test on mathematic of the fourth grade of SMP cluster 1 Banyumas in academic year 2014/2015, to describe the quality of the even final test based on the theoretical and empirical analysis. Based on the analysis result, the composition of the cognitive process in the item consisted of cognitive process of understanding (35,14%) and applying (64,86%), the knowledge composition consisted of conceptual knowledge (35,14%) and procedural (64,86%). The analysis result of the content validity, multiple choice test, short answer, and essay with the accordingly percentages 96%, 90%, and 80% had fulfilled the criteria of good test. The analysis result of the contruct validity and face validity, multiple choice test, short answer, and essay with the accordingly percentages 92%, 90%, and 80% had fulfilled the criteria of good test. The empirical result analysis showed that the validity level of the item of multiple choice and short answer were dominant in fair category, the essay were dominant in high category, the coefficient reliability of multiple choice, short anwer question, and essay were accordingly 0,62; 0,50; 0,63, the distractor of multiple choice, short answer, and essays were dominant in fair category, the difficulty level of the multiple choice, short answer, and essay were dominant in fair category.
Deskripsi Kemampuan Berikir Kritis Matematis dan Kemandirian Belajar Siswa Ditinjau dari Gaya Belajar
Authors: Mursari Cici
Published: July 2020

The study aimed to describe the mathematical critical thinking skills and learner autonomy of students at SMP Negeri 1 Baturraden viewed from learning style. This study was descriptive qualitative. The subjects of the study were students of grade VII G. The selection of the sample was done through purposive sampling technique obtaining 3 students of visual learning style, 3 students of auditory learning style and 3 students of kinesthetic learning style. Techniques to collect the data were questionnaire, test, and interview. Data analyses were data reduction, data presentation, and drawing conclusions. The validity test of the data was triangulation test of triangulation techniques. The findings obtained that students with visual learning styles mastered the indicators of analytical skills, synthesizing skills, problem solving skills as well as the skills of evaluating and assessing, meanwhile the learner autonomy mastered indicators of learning strategies, planning, evaluating, assignments/exercises, various learning resources and students workbook. Students with auditory learning styles grasped indicators of analytical skills, problem solving skills, as well as evaluating and assessing skills while for learner autonomy understood indicators of learning strategies, planning, evaluating, various learning resources and students workbook. While kinesthetic learning style students grasped the indicators of synthesizing and evaluating skills while for learner autonomy mastered the indicators of using learning strategies and using various learning resources.
Pipino traduttore del Devisement dou monde (un esercizio di prima approssimazione)
Authors: Burgio Eugenio
Published: July 2020

This paper offers a sample of the linguistic strategies used by Francesco Pipino in his Latin translation of the Marco Polo’s Devisement dou monde, by comparing a passage of Pipino’s text with its source (the Italian redaction named VA) and with the Latin redactions Z and L.
PEMILIHAN FRAMEWORK APLIKASI WEB BERBASIS JAVA MENGGUNAKAN ANALYTICAL HIERARCHY PROCESS (AHP)
Authors: Azhari Lukman
Published: July 2020

Abstract - Currently, many web application frameworks that available in the internet, we know from wikipedia that more than 20 java frameworks for developing web application. Frameworks is a developed base of related design or related architecture. A framework provides a set of libraries or classes that used by us to developing a web application, they will cooperate each others to accomplish certain tasks in the intended domain [SCHWABE 2001]. Decision makers can choose application frameworks that can be implemented in information system development. In this research writer will examine features in framework Java server faces, Struts, and Spring MVC with using ISO 9126 for getting criteria in choosing framework. This research will compare hierarchically with approaching Analytical Hierarchy Process (AHP). Finally, from the result of this research we got the best alternatif from Java framework. The best java framework is Java Framework Spring MVC in comparison of Java Framework Java Server Faces and Java Framework Struts. So, it is very clear that Java Framework Spring MVC is the best framework which supported in developing information system. Keyword : Framework, Java Server Faces, Spring MVC, ISO 9126, Analytical Hierarchy Process