bluuebunny/crossref_metadata_2025 huggingface dataset:
MODELLING TRAVELLERS’ ROUTE SWITCHING BEHAVIOUR IN RESPONSE TO VARIABLE MESSAGE SIGNS USING THE TECHNOLOGY ACCEPTANCE MODEL
Authors: Diop El Bachir , Zhao Shengchuan , Song Shuo , Duy Tran Van
Published: April 2020

Recent studies adopted models of user acceptance of information technology to predict and explain drivers’ acceptance of traffic information. Among these frameworks, the most commonly used is the Technology Acceptance Model (TAM). However, TAM is too general and does not consider drivers’ response in specific traffic conditions or choice scenarios. This study combines an extended TAM with different choice scenarios displayed by Variable Message Signs (VMS) into a Hybrid Choice Model (HCM). Two models are proposed. The first model takes into account the causal relationships among latent variables based on the following hypotheses: Information Quality (IQ) has a positive effect on Perceived Usefulness (PU) and Perceived Ease of Use (PEOU) which, in turn, have a positive effect on the Behavioural Intention (BI) to use traffic information. In the second model, the four latent variables PU, PEOU, IQ, and BI are directly added to the utility function without any causal relationships. 339 drivers with valid licence were interviewed via Stated Preference (SP) survey and the results show that TAM can explain travellers’ response to VMS if the causal relationships among latent variables are taken into account. In addition, all hypothesized relationships are strongly supported. Practical and academic implications are also discussed.
Phase Mixing of Kink MHD Waves in the Solar Corona: Viscous Dissipation and Heating
Authors: Ebrahimi Zanyar , Soler Roberto , Karami Kayoomars
Published: April 2020

Magnetohydrodynamic (MHD) kink waves have been observed frequently in solar coronal flux tubes, which makes them a great tool for seismology of the solar corona. Here, the effect of viscosity is studied on the evolution of kink waves. To this aim, we solve the initial value problem for the incompressible linearized viscous MHD equations in a radially inhomogeneous flux tube in the limit of long wavelengths. Using a modal expansion technique the spatio-temporal behavior of the perturbations is obtained. We confirm that for large Reynolds numbers representative of the coronal plasma the decrement in the amplitude of the kink oscillations is due to the resonant absorption mechanism that converts the global transverse oscillation to rotational motions in the inhomogeneous layer of the flux tube. We show that viscosity suppresses the rate of phase mixing of the perturbations in the inhomogeneous region of the flux tube and prevents the continuous building up of small scales in the system once a sufficiently small scale is reached. The viscous dissipation function is calculated to investigate plasma heating by viscosity in the inhomogeneous layer of the flux tube. For Reynolds numbers of the order of 106–108, the energy of the kink wave is transformed into heat in two to eight periods of the kink oscillation. For larger and more realistic Reynolds numbers, heating happens, predominantly, after the global kink oscillation is damped, and no significant heating occurs during the observable transverse motion of the flux tube.
Water Production Rates and Activity of Interstellar Comet 2I/Borisov
Authors: Xing 邢泽 Zexi 曦 , Bodewits Dennis , Noonan John , Bannister Michele T.
Published: April 2020

We observed the interstellar comet 2I/Borisov using the Neil Gehrels Swift Observatory’s Ultraviolet/Optical Telescope. We obtained images of the OH gas and dust surrounding the nucleus at six epochs spaced before and after perihelion (−2.56 to 2.54 au). Water production rates increased steadily before perihelion from (7.0 ± 1.5) × 1026 molecules s−1 on 2019 November 1, to (10.7 ± 1.2) × 1026 molecules s−1 on December 1. This rate of increase in water production rate is quicker than that of most dynamically new comets and at the slower end of the wide range of Jupiter-family comets. After perihelion, the water production rate decreased to (4.9 ± 0.9) × 1026 molecules s−1 on December 21, which is much more rapidly than that of all previously observed comets. Our sublimation model constrains the minimum radius of the nucleus to 0.37 km, and indicates an active fraction of at least 55% of the surface. A(0)fρ calculations show a variation between 57.5 and 105.6 cm with a slight trend peaking before the perihelion, lower than previous and concurrent published values. The observations confirm that 2I/Borisov is carbon-chain depleted and enriched in NH2 relative to water.
Contribuindo ao desenvolvimento sustentável: testes experimentais de um termossifão para aplicação em coletor solar de tubos a vácuo de alta pressão
Authors: Machado Pedro Leineker Ochoski , Basílio Kaciane Aparecida , Souza Rogério De Oliveira , Bartmeyer Guilherme Antonio , Alves Thiago Antonini
Published: April 2020

Coletores solares são dispositivos que aquecem um fluido de trabalho por meio da irradiação solar. Um tipo de coletor solar de destaque é o de tubos à vácuo que utiliza termossifões como meio de transporte de energia térmica, permitindo que esses coletores apresentem elevada eficiência e sejam mais compactos. Neste trabalho foi realizado um estudo experimental do desempenho térmico de um termossifão comercial para aplicação em coletores solares de tubos à vácuo de alta pressão na inclinação de 25° em relação à horizontal, referente à latitude da cidade de Ponta Grossa/PR: 25° 05' 42" Sul. O termossifão possui comprimento do evaporador de 1.700 mm, diâmetro do evaporador e da seção adiabática de 8,2mm, comprimento da seção adiabática de 40 mm, comprimento do condensador de 60 mm e diâmetro do condensador de 14,1 mm. O condensador foi arrefecido por convecção forçada de água. O evaporador foi aquecido utilizando um resistor elétrico simulando a irradiação solar. O termossifão foi testado com o condensador acima do evaporador para cargas térmicas de 20W a 60W. Os resultados experimentais mostraram que o termossifão comercial operou satisfatoriamente à inclinação de 25° em relação à horizontal e está apto a operar em um coletor solar de tubos a vácuo de alta pressão nessas condições.
Proposta de um modelo de referência em notação BPMN para um sistema de MRP
Authors: Entringer Tulio Cremonini , Ferreira Ailton Da Silva
Published: April 2020

As empresas estão, progressivamente, investindo em práticas voltadas para melhorias da qualidade da gestão, com a finalidade principal de habilitá-las a atuar de forma competitiva no presente mercado. Para isso, se faz necessário a documentação das atividades e informações dos processos de negócios existentes na organização, visando redução de tempo e custo na elaboração do modelo particular. Nesse contexto, o objetivo deste trabalho é desenvolver um modelo de referência dos processos do Planejamento de Requisitos de Materiais (MRP), importante módulo do planejamento e controle da produção (PCP). A metodologia de pesquisa empregada neste trabalho foi dividida nas seguintes etapas: estudo do MRP e da modelagem de processos de negócios, definição dos processos do modelo de referência, escolha da metodologia e ferramenta de modelagem de processos, desenvolvimento do modelo de referência e do protótipo do software e, por fim, análise de resultados. A notação de modelagem empregada foi o BPMN, pois é considerada uma linguagem padrão no campo de modelagem de processos. O protótipo foi desenvolvido através da interface Delphi com o intuito de aplicar o modelo no apoio à implantação de programas de gestão empresarial. Como resultados, a partir de uma documentação formal, o modelo mostrou-se um mecanismo útil na compreensão dos processos levantados e apropriado no suporte à implantação de ferramentas de gestão da produção.
Consórcios públicos e o atendimento à política nacional de resíduos sólidos por municípios do Cariri Paraibano
Authors: Freire da Silva Allan Gustavo , Pereira Quirino Flávia Emanoela Sousa , Barreto Laís Karla Da Silva , De Sousa Williams Martinho Soares , Rocha Neto Manoel Pereira da
Published: April 2020

A Política Nacional de Resíduos Sólidos - PNRS estabelece as diretrizes para adequado gerenciamento dos resíduos sólidos. O objetivou-se nesse trabalho, analisar a possível viabilidade de criação de consórcios de gestão de resíduos sólidos em municípios do Cariri Paraibano. Metodologicamente, utilizou-se, para coleta de dados primários, a aplicação de questionários em 10 municípios localizados na região do Cariri Paraibano, com a intenção de identificar, considerando o período de 2017, a atual situação municipal sobre o gerenciamento dos resíduos sólidos; buscou-se ainda, avaliar as capacidades financeiras, bem como as possibilidades de investimento destes municípios. Para a aquisição de dados secundários, foram realizadas consultas aos sites do Tribunal de Contas do Estado da Paraíba e ao SAGRES Cidadão. Verificou-se que os municípios carecem de capacidade financeira e que não possuem adequada estrutura financeira para o cumprimento das exigências, de acordo com o que preceitua a PNRS. Desse modo, observa-se que a formação de um consórcio público, dispositivo administrativo-gerencial, assegurado constitucionalmente, apresenta-se como uma alternativa viável à promoção do atendimento à Lei 12.305/2010, no tocante à maioria dos municípios pesquisados.
O processo de des-re-territorialização dos moradores do conjunto residencial Geraldo Felippe no município de Paranavaí-PR: uma intervenção urbana a partir do programa Minha Casa Minha Vida
Authors: Silva Dayane Alves de Souza , Chagas Priscilla Borgonhoni
Published: April 2020

Embora o espaço urbano seja produzido por diversos agentes sociais, o Estado exerce papel relevante em sua produção. Todavia, em determinadas situações ele recorre a fatores econômicos, sem considerar aspectos políticos, culturais e, principalmente, sociais. Com as políticas habitacionais, os indivíduos são deslocados para locais distantes do centro da cidade, passando por um processo de territorialização-desterritorialização-reterritorialização (T-D-R). Baseado nesta perspectiva, este artigo tem por objetivo compreender como ocorreu o processo de (re)territorialização dos moradores do Conjunto Residencial Geraldo Felippe no município de Paranavaí – PR, a partir da intervenção do Programa Minha Casa Minha Vida (faixa 1). Assim, foi conduzido um estudo qualitativo e descritivo, envolvendo entrevistas semiestruturadas com os moradores. Para a interpretação dos dados coletados, utilizou-se a técnica da análise de conteúdo. Constatou-se que os moradores, de modo explícito, tem um sentimento de felicidade pela “casa própria”, entretanto, implicitamente, existem diferenças em relação ao território que viviam antes e o que vivem agora. Os principais resultados sugerem que na formulação de uma política habitacional deve-se ter uma visão integradora, não negligenciando os aspectos territoriais, uma vez que tais intervenções impactam a organização territorial da cidade e, consequentemente, o cotidiano dos indivíduos.
Aspectos geoambientais como subsídio ao planejamento urbano da cidade de Marabá (PA)
Authors: Lemos da Costa Savannah Tâmara , De Sousa Farias Layla Jasmim , Epifanio Loureiro Glauber
Published: April 2020

O crescimento populacional acompanhado do processo de urbanização nas cidades, tem intensificado a ocupação em locais cada vez mais adensados. Nesse sentido o objetivo deste estudo foi avaliar os aspectos geoambientais do perímetro urbano de Marabá-Pará para indicar as áreas adequadas à ocupação habitacional. Para tanto, utilizou-se informações espaciais processadas através de ESRI (2014), para elaboração dos mapas referentes aos aspectos geoambientais. Após isto, cada fator geoambiental foi submetido a Análise Hierárquica de Processos (AHP) em ambiente SIG. Como resultado, a compilação dos dados demonstrou que da totalidade do perímetro urbano de Marabá, 35% da área é considerada favorável a ocupação habitacional. Deste percentual, a primeira opção de local mais adequado é a parte oeste da Zona de Expansão da Cidade Nova, onde verifica-se a predominância de áreas apropriadas, as quais representam 57,7% do total da zona. Apesar do núcleo São Felix também ser considerado adequado à habitação, a vulnerabilidade deste local se sustenta na planície fluvial, a qual é uma unidade geomorfológica fragilizada e característica de terrenos inundados. Nesse sentido, enfatiza-se a importância do estudo dos aspectos geoambientais paralelo ao planejamento urbano, com o intuito de minimizar a potencialização da fragilidade ambiental de áreas inapropriadas para ocupação habitacional.
The genus Phasgonophora Westwood, 1832 (Hymenoptera, Chalcididae) in Saudi Arabia: re-evaluation of its limits and description of three new species
Authors: Gul Muhammad Athar , Soliman Ahmed Mostafa , Gadallah Neveen Samy , Al Dhafer Hathal Mohammed , Delvare Gérard
Published: April 2020

A phylogenetic study based on 25 species of Phasgonophorinae (Hymenoptera: Chalcididae) and 36 characters was carried out for ensuring the generic placement of three new species from Saudi Arabia. As a result of this study, the generaTrigonuraSichel, 1866,BactrochalcisKieffer, 1912,CentrochalcisCameron, 1913,CentrochalcidiaGahan & Fagan, 1923,ChalcidelliaGirault, 1924,UrochalcisNikol’skaya, 1952,TrigonurellaBouček, 1988, andMuhabbetellaKoçak & Kemal, 2008 are synonymized withPhasgonophoraWestwood, 1832. This genus is recorded in Saudi Arabia for the first time, represented here byP. rubens(Klug), and newly described speciesP. baiocchiiSoliman & Gul,sp. nov.,P. granulisDelvare,sp. nov., andP. magnaniiGadallah & Gul,sp. nov.An illustrated key to species of the Arabian Peninsula is provided. The relevant specimens were mostly reared from buprestid species infestingAcaciasp. andDodonaea viscosain Al-Baha, Asir and Riyadh regions, Saudi Arabia.
Las andanzas de la portada de Oñate tras la demolición de la casa-palacio: calle Mayor, Teatro Español, La Moncloa
Authors: Muñoz Hernández Jara , Villarreal Colunga Carlos
Published: April 2020

Este artículo cuenta la historia de los cambios de localización, reales o imaginados, de la portada del palacio del conde de Oñate y Villamediana de la calle Mayor de Madrid. La investigación aborda el origen de la portada, su abandono tras la demolición del palacio, los proyectos en los que se sitúa y la reconstrucción en la Casa de Velázquez en La Moncloa, donde, a pesar de resistir los bombardeos durante la guerra civil, se demuele y desaparece, quedando algunos restos en el jardín. Se hace este viaje a través de información gráfica relevante, como los dibujos del palacio (ca. 1845), el proyecto de fachada del Teatro Español (1917) y el levantamiento de la portada de la Revista Arquitectura (1927). Se emplea el Dibujo de Arquitectura como instrumento para la confirmación de argumentos, la búsqueda de respuestas y la hipótesis de localización de los restos en la portada.
Modeling Binary Fingerprint Descriptors With the Superposing Significant Interaction Rules (SSIR) Method
Authors: Besalú Emili
Published: April 2020

Recently, the superposing significant interaction rules (SSIR) method has been applied in several fields of QSPR to model and establish molecular rankings that correlate dichotomous properties. The origin of the method is in the field of combinatorial chemistry, but it has been shown that the procedure is fast, versatile, and that it can be applied in many other fields. In particular, an example is phospholipidosis modeling taking, as primary descriptors, the binary fingerprints of the molecules. This is the first time SSIR is used to treat this kind of descriptors. The performance achieved is similar to other results found in the literature and, in particular, to the results obtained by authors who considered the same molecular set and descriptors. One of the main advantages of SSIR is that the method acts as an automated variable selector. This allows it to be used almost immediately without prior selection of variables.
Cullin 3 Is Crucial for Pro-B Cell Proliferation, Interacts with CD22, and Controls CD22 Internalization on B Cells
Authors: Meyer Sarah J. , Böser Alexander , Korn Marina A. , Koller Claudia , Bertocci Barbara , Reimann Lena , Warscheid Bettina , Nitschke Lars
Published: April 2020

B lymphocytes are important players of the adaptive immune system. However, not just activation of B cells but also regulation of B cell signaling is important to prevent hyperactivity and dysregulation of the immune response. Different mechanisms and proteins contribute to this balance. One of these is CD22, a member of the Siglec family. It is an inhibitory coreceptor of the BCR and inhibits B cell activation. Upon BCR stimulation, CD22-dependent inhibition of BCR signaling results in a decreased calcium mobilization. Although some CD22 binding partners have already been identified, the knowledge about the CD22 interactome is still incomplete. In this study, quantitative affinity purification–mass spectrometry enabled the delineation of the CD22 interactome in the B cell line DT40. These data will clarify molecular mechanisms and CD22 signaling events after BCR activation and revealed several new CD22-associated proteins. One new identified interaction partner is the E3 ubiquitin ligase cullin 3, which was revealed to regulate CD22 surface expression and clathrin-dependent CD22 internalization after BCR stimulation. Furthermore cullin 3 was identified to be important for B lymphocytes in general. B cell–specific cullin 3-deficient mice show reduced developing B cells in the bone marrow and a severe pro-B cell proliferation defect. Mature B cells in the periphery are also reduced and characterized by increased CD22 expression and additionally by preactivated and apoptotic phenotypes. The findings reveal novel functions of cullin 3 in B lymphocytes, namely regulating CD22 surface expression and internalization after B cell activation, as well as promoting proliferation of pro-B cells.
Investigation of Effect of Tectorigenin (O-Methylated Isoflavone) on Ca2+ Signal Transduction and Cytotoxic Responses in Canine Renal Tubular Cells
Authors: Cheng He-Hsiung , Liang Wei-Zhe , Liao Wei-Chuan , Kuo Chun-Chi , Hao Lyh-Jyh , Chou Chiang-Ting , Jan Chung-Ren
Published: April 2020

Tectorigenin, a traditional Chinese medicine, is isolated from the flower of plants such as Pueraria thomsonii Benth. It is an O-methylated isoflavone, a type of flavonoid. Previous studies have shown that tectorigenin evoked various physiological responses in different models, but the effect of tectorigenin on cytosolic-free Ca2+ levels ([Ca2+]i) and cytotoxicity in renal tubular cells is unknown. Our research explored if tectorigenin changed Ca2+ signal transduction and viability in Madin–Darby Canine Kidney (MDCK) renal tubular cells. [Ca2+]i in suspended cells were measured by applying the fluorescent Ca2+-sensitive probe fura-2. Viability was explored by using water-soluble tetrazolium-1 as a fluorescent dye. Tectorigenin at concentrations of 5–50 μM induced [Ca2+]i rises. Ca2+ removal reduced the signal by approximately 20%. Tectorigenin (50 μM) induced Mn2+ influx suggesting of Ca2+ entry. Tectorigenin-induced Ca2+ entry was inhibited by 10% by three inhibitors of store-operated Ca2+ channels, namely, nifedipine, econazole, and SKF96365. In Ca2+-free medium, treatment with the endoplasmic reticulum Ca2+ pump inhibitor thapsigargin inhibited 83% of tectorigenin-evoked [Ca2+]i rises. Conversely, treatment with tectorigenin abolished thapsigargin-evoked [Ca2+]i rises. Inhibition of phospholipase C with U73122 inhibited 50% of tectorigenin-induced [Ca2+]i rises. Tectorigenin at concentrations between 10 and 60 μM killed cells in a concentration-dependent fashion. Chelation of cytosolic Ca2+ with 1,2-bis (2-aminophenoxy)ethane-N, N, N', N'-tetraacetic acid/acetoxy methyl did not reverse tectorigenin's cytotoxicity. Our data suggest that, in MDCK cells, tectorigenin evoked [Ca2+]i rises and induced cell death that was not associated with [Ca2+]i rises. Therefore, tectorigenin may be a Ca2+-independent cytotoxic agent for kidney cells.
Repetitively Hypoxic Preconditioning Attenuates Ischemia/Reperfusion-Induced Liver Dysfunction Through Upregulation of Hypoxia-Induced Factor-1 Alpha-Dependent Mitochondrial Bcl-xL in Rat
Authors: Chou Pei-Lei , Chen Kuo-Hsin , Chang Tzu-Ching , Chien Chiang-Ting
Published: April 2020

Repetitive hypoxic preconditioning (HP) enforces protective effects to subsequently severe hypoxic/ischemic stress. We hypothesized that HP may provide protection against ischemia/reperfusion (I/R) injury in rat livers via hypoxia-induced factor-1 alpha (HIF-1α)/reactive oxygen species (ROS)-dependent defensive mechanisms. Female Wistar rats were exposed to hypoxia (15 h/day) in a hypobaric hypoxic chamber (5500 m) for HP induction, whereas the others were kept in sea level. These rats were subjected to 45 min of hepatic ischemia by portal vein occlusion followed by 6 h of reperfusion. We evaluated HIF-1α in nuclear extracts, MnSOD, CuZnSOD, catalase, Bad/Bcl-xL/caspase 3/poly-(ADP-ribose)-polymerase (PARP), mitochondrial Bcl-xL, and cytosolic cytochrome C expression with Western blot and nitroblue tetrazolium/3-nitrotyrosine stain. Kupffer cell infiltration and terminal deoxynucleotidyl transferase-mediated nick-end labeling method apoptosis were determined by immunocytochemistry. The ROS value from liver surface and bile was detected by an ultrasensitive chemiluminescence–amplification method. Hepatic function was assessed with plasma alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels. HP increased nuclear translocation of HIF-1α and enhanced Bcl-xL, MnSOD, CuZnSOD, and catalase protein expression in a time-dependent manner. The response of HP enhanced hepatic HIF-1α, and Bcl-xL expression was abrogated by a HIF-1α inhibitor YC-1. Hepatic I/R increased ROS levels, myeloperoxidase activity, Kupffer cell infiltration, ALT and AST levels associated with the enhancement of cytosolic Bad translocation to mitochondria, release of cytochrome C to cytosol, and activation of caspase 3/PARP-mediated apoptosis. HP significantly ameliorated hepatic I/R-enhanced oxidative stress, apoptosis, and mitochondrial and hepatic dysfunction. In summary, HP enhances HIF-1α/ROS-dependent cascades to upregulate mitochondrial Bcl-xL protein expression and to confer protection against I/R injury in the livers.
Ipomoea aquatica Extract Reduces Hepatotoxicity by Antioxidative Properties following Dichlorvos Administration in Rats
Authors: Salahshoor Mohammad Reza , Abdolmaleki Amir , Shabanizadeh Ahmad , Jalali Amir , Roshankhah Shiva
Published: April 2020

Ipomoea aquatica (IA) with antioxidant properties is used in therapeutic trends. An organophosphate, dichlorvos (Dich), is a common insecticide with various side effects on living tissues. This study examines the role of IA on Dich-induced hepatotoxicity in male rats. Sixty-four male rats were divided into eight groups including sham, Dich (4 mg/kg/day, intraperitoneally), IA 1, 2, and 3 (250, 500, and 1000 mg/kg/day, respectively, orally), and Dich + IA 1, 2, and 3. All treatments were applied daily for 60 days. At the end of the treatment, the animals were sacrificed. The histopathological changes, leukocyte infiltration, and apoptosis were assessed by light and fluorescent microscopy. The serum levels of hepatic enzymes, nitrite oxide (NO), and total antioxidant capacity (TAC) were evaluated biochemically. Dich statistically significantly increased the NO level, hepatic enzyme activity, apoptosis, leukocyte infiltration, the mean diameter of hepatocytes (DHs), and central hepatic vein diameter (CHVD) and also decreased the TAC, mean weight of liver, and the total weight of rats compared to the sham group (P < 0.01). In all IA and Dich + IA groups, a statistically significant decrease was detected in apoptosis, leukocyte infiltration, hepatic enzyme activity, NO level, mean DH, and CHVD, whereas an increase in TAC level, mean liver weight, and total weight was detected compared to the Dich group (P < 0.01). IA, due to the antioxidant property, recovers the Dich-related catastrophic changes in liver.
Alternaria chartarum sclerokeratouveitis
Authors: Concha del Río Luz Elena , Ramirez-Dominguez Carolina , Vanzzini-Zago Virginia , Arellanes-Garcia Lourdes
Published: April 2020

We report a case of Alternaria chartarum sclerokeratouveitis with an unfavorable response to treatment. To the best of our knowledge, there are no previous reports of this fungus invading the sclera. A 68-year-old diabetic farmer male patient presented with a 3-week history of pain and redness and a decrease in visual acuity occurring 5 days before admittance in the right eye. Examination revealed severe mixed hyperemia and a scleral calcified plaque with a surrounding area of ischemia and lysis. The cornea showed diffuse infiltrates, stromal edema, and hypopyon. Initial scrapings were negative, and empiric antibiotics were started. After a fungus was reported, topical and systemic antifungals were initiated, but there was no clinical response. The eye was enucleated. A slow-growing fungus A. chartarum, resistant to voriconazole, was isolated. Fungal etiology must be kept in mind when dealing with infectious scleritis. Despite treatment, the outcome of this case was unfavorable due to the slow-growing nature of the fungus and this strain's resistance to voriconazole.
Bilateral maculopathy and cataracts secondary to an accidental high-voltage electrical discharge
Authors: Peñaranda Carlos F. , Acon Dhariana , Valdes Carlos A. , Wu Lihteh
Published: April 2020

The aim of the study was to describe the ocular findings following an accidental high-voltage electrical discharge. A 32-year-old male suffered an accidental electric discharge of 10,000 volts of direct current. He developed cortical, nuclear, and posterior subcapsular opacities in both the eyes. The retinal examination showed bilateral macular cysts. Four months after the event, the macular cyst in the OD spontaneously regressed without visual improvement. The macular cyst in the OS remained unchanged. High-voltage electrical discharge can lead to bilateral maculopathy and cataracts. The visual prognosis is reserved. The visual acuity may not improve despite macular cyst regression.
Асимптотическое решение кулоновской многоканальной задачи рассеяния с неадиабатической связью каналов
Authors: Yakovlev Sergei Leonidovich
Published: April 2020

Разработана корректная формулировка многочастичной кулоновской задачи рассеяния на основе построенных асимптотических решений кулоновской многоканальной задачи рассеяния в адиабатическом представлении. Ключевой особенностью исследованной проблемы является нетривиальность матрицы неадиабатической связи каналов на больших межъядерных расстояниях. Рассмотрен случай задачи рассеяния с произвольным значением углового момента. Подробно исследованы решения для малых значений матрицы связи каналов. В этом случае построены явные представления для асимптотического решения задачи рассеяния.
Квантование теории полудифференцируемых струн
Authors: Sergeev Armen Glebovich
Published: April 2020

Задача квантования пространства $\Omega_d$ гладких петель, принимающих значения в $d$-мерном векторном пространстве, может решаться в рамках стандартного дираковского подхода. Однако естественная симплектическая форма на $\Omega_d$ продолжается на гильбертово пополнение пространства $\Omega_d$, совпадающее с соболевским пространством $V_d:=H_0^{1/2}(\mathbb S^1,\mathbb R^{d})$ полудифференцируемых петель со значениями в $\mathbb R^{d}$. Пространство $V_d$ рассматривается как фазовое пространство теории полудифференцируемых струн. Эту теорию удается проквантовать, пользуясь идеями из некоммутативной геометрии.
PENGARUH KEPRIBADIAN DAN MOTIVASI TERHADAP KINERJA TUGAS GURU SD SWASTA KECAMATAN KELAPA GADING JAKARTA UTARA
Authors: Yulia Hidayati  , I Made Putrawan  , Mukhneri Mukhtar
Published: April 2020

This research aimed to investigate the effect of (1) personality, (2) motivation, (3) task performance of teachers in private elementary school subdistrict Kelapa Gading North Jakarta. Survey method with a quantitative-causal approach using Path Analysis Technique was used to in this research. This survey involving 84 teachers as a sample using simple random sampling technique by Slovin formula. The findings of this study indicated: first, there is a positive direct effect of personality toward task performance teachers in school. Second, there is a positive direct effect of motivation toward task performance teachers in school. Third, there is a positive direct effect of personality toward motivation teachers in school.

 

Abstrak

Penelitian ini bertujuan untuk menyelidiki efek dari (1) kepribadian, (2) motivasi, (3) tugas kinerja guru pribadi SD Kecamatan Kelapa Gading Jakarta Utara. Penelitian ini menggunakan metode survei dengan pendekatan kuantitatif-kausal dengan teknik analisis jalur. Survei melibatkan 84 guru sebagai sampel yang menggunakan teknik sampel acak sederhana dengan rumus Slovin. Hasil penelitian menunjukkan: pertama, terdapat pengaruh langsung positif kepribadian terhadap kinerja tugas guru di sekolah. Kedua, terdapat pengaruh langsung positif motivasi terhadap kinerja tugas guru di sekolah. Ketiga, terdapat pengaruh langsung positif kepribadian terhadap motivasi guru di sekolah.

Kata Kunci: Kepribadian, Motivasi, Kinerja Tugas
PENGARUH STRATEGI PEMBELAJARAN VISUAL, AUDIO, KINESTETIK (VAK) DAN KEMAMPUAN BERPIKIR KRITIS TERHADAP HASIL BELAJAR IPA SISWA SEKOLAH DASAR
Authors: Helmi Yahya Nurdiansyah  , Agung Purwanto  , Sarkadi
Published: April 2020

This research was low achievement of Indonesian student on natural science subject based on data obtained from programme for International Student Assasment (PISA) in 2015. This research objective was to look at the influence of visual, audio, kinesthetic (VAK) learning strategies and critical thingking skills on primary school student natural science outcomes. This research used an experimental method using group design by 2 x 2 level. Analysis of variance 2 path (ANOVA) was used to analys the data. This research of Majalengka Wetan VII elementary school on natural science subject. The result of the study showed that there was an influence of VAK learning strategies and the ability to think critically on student learning outcomes in water cycle material. In addition, the VAK learning strategy could improve student learning outcomes for students who had high or low critical thinking skills.

 

Abstrak

Penelitian ini dilatarbelakangi oleh rendahnya rata-rata skor pencapaian sains siswa-siswi Indonesia berdasarkan data yang diperoleh dari Programme for International Students Assesment (PISA) tahun 2015. Penelitian ini bertujuan untuk mencari pengaruh pengaruh strategi pembelajaran visual, audio, kinestetik (vak) dan kemampuan berpikir kritis terhadap hasil belajar IPA siswa sekolah dasar. Penelitian ini menggunakan metode eksperimen dengan menggunakan desain kelompok by level 2 x 2. Analisis data menggunakan analisis varian 2 jalur (ANOVA). Penelitian ini dilaksanakan pada siswa kelas V SDN Majalengka Wetan VII dengan mata pelajaran IPA. Hasil penelitian dengan , menunjukan bahwa terdapat pengaruh strategi pembelajaran VAK dan kemampuan berpikir kritis terhadap hasil belajar siswa pada materi siklus air. Selain itu, Strategi pembelajaran VAK dapat meningkatkan hasil belajar siswa bagi siswa yang memiliki kemampuan berpikir kritis tinggi maupun rendah.

Kata Kunci: Strategi Pembelajaran VAK, Kemampuan Berpikir Kritis, Hasil Belajar
PENERAPAN MODEL PEMBELAJARAN TWO STAY TWO STRAY (TS – TS) DENGAN AKTIVITAS WINDOW SHOPPING UNTUK MENINGKATKAN MOTIVASI BELAJAR MAHASISWA IAIN BONE
Authors: Rina Novianty
Published: April 2020

This research was a Classroom Action Research (CAR) which aimed to improve the students learning motivation in IAIN Bone through the application of the Two Stay Two Stray (TS-TS) learning model with Activity Window Shopping. This research was conducted in two cycles. Each cycle consists of four stages, namely planning, action, observation, and reflection. The techniques in Data collection used in this research were questionnaire and documentation. The instrument used in this research was a list of questions on the questionnaire. The technique in data analysis used was descriptive data analysis by looking at the average score percentage by describing the quantitative data obtained. Based on the results of the research, it was concluded that the Application of Two Stay Two Stray (TS - TS) Learning Model with Window Shopping Activity can increase the students learning motivation in IAIN Bone. From the result of questionnaire data analysis the research showed that the percentage of the students learning motivation was obtained by an average score of 77.10% in the first cycle and then increases to 82.07% in the second cycle or increase of 4.97%.

 

Abstrak

Penelitian ini merupakan Penelitian Tindakan Kelas (PTK) yang bertujuan untuk meningkatkan motivasi belajar mahasiswa IAIN Bone melalui penerapan model pembelajaran Two Stay Two Stray (TS - TS) dengan Aktivitas Window Shopping. Penelitian ini dilaksanakan dalam dua siklus. Tiap siklus terdiri dari empat tahapan, yaitu perencanaan, tindakan, pengamatan, dan refleksi. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah angket dan dokumentasi. Instrumen yang digunakan dalam penelitian  ini adalah daftar pertanyaan pada angket. Teknik analisis data yang digunakan adalah analisis data deskriptif dengan melihat persentase skor rata- rata dengan mendeskripsikan data kuantitatif yang diperoleh. Berdasarkan hasil penelitian disimpulkan bahwa Penerapan Model Pembelajaran Two Stay Two Stray (TS - TS) dengan Aktivitas Window Shopping dapat  Meningkatkan  Motivasi Belajar Mahasiswa IAIN Bone. Dari hasil analisis data angket penelitian menunjukkan bahwa persentase motivasi belajar mahasiswa diperoleh rata –rata  skor 77,10 % pada siklus I dan kemudian meningkat menjadi 82,07 % pada siklus II atau terjadi peningkatan 4,97%.

Kata kunci: Two Stay Two Stray, Window Shopping, motivasi belajar
PENGARUH SUPERVISI AKADEMIK DAN KERJASAMA TIM TERHADAP EFEKTIFITAS KERJA GURU SEKOLAH MENENGAH PERTAMA NEGERI DI KOTA BEKASI
Authors: Rabiatul Adawiyah  , Neti Karnati  , Siti Rochanah
Published: April 2020

This study aims to determine the effect of academic supervision and teamwork on the effectiveness of the work of State Junior High School teachers in Bekasi City. This research was conducted using a quantitative approach and data collection techniques using questionnaires involving 243 public junior high school teachers in Bekasi City as a research sample. The sample in this study was determined randomly using Slovin formula. Analysis and interpretation of data indicate; First, the influence of academic supervision is directly positive and significant for teacher work effectiveness with a path coefficient of 0.249. Second, the influence of teamwork is directly positive on teacher work effectiveness with path coefficients of 0.557. Third, the influence of academic supervision is directly positive on teamwork with a path coefficient of 0.383. Based on the results of this study, teacher work effectiveness can be improved with appropriate academic supervision. Teamwork through coordination, interpersonal activities, responsibility, support between individuals and collaboration can improve teacher work effectiveness. 

 

Abstrak

Penelitian ini bertujuan untuk mengetahui pengaruh supervisi akademik dan kerjasama tim terhadap efektivitas kerja guru Sekolah Menengah Pertama Negeri di Kota Bekasi. Penelitian ini dilakukan dengan menggunakan pendekatan kuantitatif dan teknik pengumpulan data dengan menggunakan angketdengan melibatkan 243 guruSMP Negeri di Kota Bekasi sebagai sampel penelitian. Sampel dalam penelitian ini ditentukan secara acak dengan menggunakan rumus Slovin. Analisis dan interpretasi data menunjukkan indikasi; Pertama, adanya pengaruh supervisi akademik langsung positif dan signifikan terhadap efektivitas kerjaguru dengan koefisien jalur0,249. Kedua, adanya pengaruh kerja sama tim secara langsung positif terhadap efektivitas kerja guru dengan koefisien jalur0,557. Ketiga, adanya pengaruh supervisi akademik secara langsung positif terhadap kerja sama tim dengan koefisien jalur 0,383. Berdasarkan hasil penelitian ini, efektivitas kerja guru dapat ditingkatkan dengan supervisi akademik yang dilakukan secara tepat. Kerjasama tim melalui koordinasi, aktivitas interpersonal, tanggung jawab, dukungan antara individu dan kerjasama dapat meningkatkan efektivitas kerja guru.

Kata kunci: Supervisi Akademik, Kerjasama Tim, Efektifitas Kerja
BELAJAR KOOPERATIF MODEL PENYELIDIKAN KELOMPOK DALAM PEMBELAJARAN MEMBACA PEMAHAMAN UNTUK MENINGKATKAN KETERAMPILAN MEMBACA SISWA KELAS 5 SEKOLAH DASAR
Authors: Baihaqi
Published: April 2020

Penelitian ini dilakukan untuk mencari bentuk belajar kooperatif model penyelidikan kelompok dalam pembelajaran membaca pemahaman yang dapat meningkatkan keterampilan membaca siswa pada tahap pra baca, saat baca, dan pasca baca. Rancangan penelitian yang digunakan adalah penelitian tindakan kelas kolaboratif. Sumber data dalam penelitian ini adalah satu kelas, yakni siswa kelas V SDN Karang Besuki 1 Malang. Subjek penelitian di fokuskan pada satu kelompok 4 siswa yang heterogen dari segi kemampuan, jenis kelamin, dan status sosial. Penelitian dilaksanakan pada bulan Agustus sampai September 2003. Hasil penelitian menunjukkan bahwa belajar kooperatif model penyelidikan kelompok dapat meningkatkan keterampilan membaca siswa dalam pembelajaran membaca pemahaman. Model penyelidikan kelompok yang dapat meningkatkan keterampilan membaca siswa terbagi dalam tiga kegiatan, yaitu kegiatan perencanaan, pelaksanaan, dan evaluasi. Kegiatan pelaksanaan terbagi menjadi tiga tahap, yaitu tahap pra baca, saat baca dan pasca baca
FERMAT TEST AND THE EXISTENCE OF PSEUDOPRIMES
Authors: Ega Gradini
Published: April 2020

In this paper the author present Fermat test as one of primality tests. In order to perform the ability of the test, the algorithm of the test coded in Mathematica (6.0 version). The application of Fermat’s Little Theorem as well as Euler’s Theorem on the tests are also discussed and this leads to the concept of pseudoprime.
MANAJEMEN KONFLIK DI SEKOLAH
Authors: Inom Nasution
Published: April 2020

Dalam suatu organisasi tidak terlepas dari konflik. Kepala sekolah sebagai pimpinan tertinggi di sekolah harus dapat mengetahui factor-faktor timbulnya konflik. Ketidak cocokan antar dua pihak yang terlibat konflik terjadi karena kelangkaan sumber daya, baik berupa dana, promosi, prestise, perbedaan penafsiran ide, ketidaksesuaian sasaran dan tujuan yang ingin dicapai, kekuasaan maupun bentuk yang mendukung satu pihak menghargai pihak lain. Sumber-sumber konflik diantaranya keterbatasan sumber daya organisasi, (2) kegagalan komunikasi, (3) perbedaan sifat, nilai-nilai dan persepsi, (4) saling ketergantungan tugas, (5) sistem penggajian. Strategi penyelesaian konflik (a) negosiasi yang berarti proses dimana dua kelompok yang bertikai duduk bersama untuk saling membuat penawaran, kontra-penawaran, dan kesepakatan dalam upaya memecahkan masalah perbedaan-perbedaan yang terjadi, (b) negosiator dari pihak ketiga atau mengundang pihak ketiga yang terampil melakukan tawar menawar dan negosiasi, (c) mediator yang berarti mengundang pihak ketiga yang berada pada posisi netral untuk membantu pihak yang bertikai merekonsiliasi perbedaan-perbedaan yang timbul diantara mereka, dan (d) artiber atau pihak ketiga yang memiliki kewenangan menerapkan solusi atas perbedaan pihak-pihak yang bertikai.
STUDENT’S ABILITY IN ENGLISH SPEAKING SKILL BY USING PICTURE (A COMPARATIVE STUDY BETWEEN MUHAMMADIYAH ISLAMIC SCHOOL AND SMAN 1 SIMEULUE TIMUR)
Authors: Indratmoko Ariwibowo
Published: April 2020

This study is intended to figure out if there is a significant difference in English speaking ability between public school students and Islamic school students. The population of this study is the second year students of both SMAN 1 Simeulue Timur and Muhammadiyah Islamic School Simeulue Timur. The samples of this study were 20 students taken from two classes at SMAN 1 Simeulu Timur and 20 students taken from two classes at Muhammadiyah Islamic School Simeulue Timur. So, the total number of samples from the two schools was 40 students. In collecting the data, the writer gave a picture of 26th December 2004 tsunami in Aceh. The students were asked to describe the picture by their own words. In analyzing the data, the writer used t-test formula to see the significant difference between the students of the two schools in English speaking ability. The mean and standard deviation scores for Muhammadiyah Islamic School Simeulue Timur are 35.25 and 8.20. While the mean and mean and standard deviation scores for SMAN 1 Simeulue Timur are 39 and 8. The result of t-test of the two schools is 13.20. It is considered higher than t value on the table if significance at level 0.05 and 38 for the degree of the freedom which is stated 2.02. The writer concludes that the speaking ability between SMAN 1 Simeulue Timur and Muhammadiyah Islamic School Simeulue Timur is significantly different. Furthermore, the writer found that students of SMAN 1 Simeulue Timur are better in speaking ability than those of Muhammadiyah Islamic School Simeulue Timur. Therefore, the writer suggests that the teachers of boarding school should evaluate their teaching learning process and have more motivation to improve their student’s ability English speaking
THE IMPLEMENTATION OF GAME IN TEACHING ENGLISH VOCABULARY
Authors: Syarfuni
Published: April 2020

The primary activities of students in the classroom is learning. Successful learning is only the right way to lead the process. Good learning atmosphere method and technique will guide the students to learn more serious and meaningful. To accomplish such condition, the teacher must create some types and attractive method or technique in the classroom. To avoid the students bore in the classroom the teacher should use some types of game to be an alternative solution to handle the problem. Games as a matter of fact can help and encourage students to sustain their interest in learning English. In this paper the writer wants to share experiences about the implementation of game in teaching English.
ALIRAN-ALIRAN DALAM FILSAFAT
Authors: Musdiani
Published: April 2020

Filsafat merupakan bagian dari kehidupan Manusia, dan karena itu tercermin dari sikap manusia dalam kehidupan sehari-hari. Aliran-aliran filsafat dan kaitanya dengan ilmu pengetahuan, merupakan penelahan dua aspek sekaligus menyangkut paham dan pandangan para ahli pikir atau filsafat. Dari kajian ini para ahli pikir melihat sesuatu secara menyeluruh, mendalam dan sistematis. Sedangkan ilmu pengetahuan dalam mengkaji atau mempelajari sesuatu tidak secara menyeluruh akan tetapi mempelajari bagian-bagian tertentu saja. Dengan demikian dapat disimpulkan bahwa aliran-aliran filsafat mempunyai kaitan dengan ilmu pengetahuan terutama aliran realisme, aliran reasionalisme, aliran empirisme, dan aliran positivisme. Yang memandang aliaran dalam Filsafat secara berbeda.
KOMPETENSI GURU DAN PERANAN KEPALA SEKOLAH
Authors: Inom Nasution
Published: April 2020

Dalam upaya meningkatan mutu pendidikan, kompetensi guru merupakan salah satu faktor yang sangat penting. Kompetensi guru tersebut meliputi kompetensi pedagogik, kompetensi personal, kompetensi sosial dan kompetensi profesional. Upaya untuk meningkatkan kompetensi guru dapat dilakukan melalui optimalisasi peran kepala sesekolah, sebagai : edukator, manajer, administrator, supervisor, leader, pencipta iklim kerja dan wirausahawan.
COMPARISON STUDY OF FERMAT, SOLOVAY-STRASSEN AND MILLER-RABIN PRIMALITY TEST USING MATHEMATICA 6.0
Authors: Ega Gradini
Published: April 2020

This paper presents three primality tests; Fermat test, Solovay-Strassen test, and Rabin-Miller test. Mathematica software is used to carry out the primality tests. The application of Fermat’s Litle Theorem as well as Euler’s Theorem on the tests was also discussed and this leads to the concept of pseudoprime. This paper is also discussed some results on pseudoprimes with certain range and do quantitative comparison. Those primality tests need to be evaluated in terms of its ability to compute as well as correctness in determining primality of given numbers. The answer to this is to create a source codes for those tests and evaluate them by using Mathematica 6.0. Those are Miller-Rabin test, Solovay-Strassen test, Fermat test and Lucas-Lehmer test. Each test was coded using an algorithm derived from number theoretic theorems and coded using the Mathematica version 6.0. Miller-Rabin test, SolovayStrassen test, and Fermat test are probabilistic tests since they cannot certainly identify the given number is prime, sometimes they fail. Using Mathematica 6.0, comparison study of primality test has been made and given the Miller- Rabin test as the most powerful test than other.
EVALUASI PROGRAM DIKLAT PADA KOPERASI MAHASISWA (KOPMA) DALAM LINGKUNGAN PERGURUAN TINGGI BINA BANGSA GETSEMPENA BANDA ACEH TAHUN 2011
Authors: Azhar Amsal
Published: April 2020

Perguruan Tinggi memiliki landasan ideal dan praktis yakni sebagai bagian dari upaya kegiatan pengembangan dalam proses pembelajaran bagi mahasiswa dan mempunyai hubungan kerjasama dan jaringan antar kampus. Jaringan assosiasi Koperasi Mahasiswa (Kopma) merupakan satu kekuatan organisasi yang dapat digerakkan sebagai wadah yang mampu mendukung sinergi pengembangan dalam mengatasi segala permasalahan kopma di tingkat nasional, regional dan lokal. Evaluasi program bertujuan untuk mengetahui apakah program yang dirancang, dilaksanakan, dan bermanfaat bagi pihak-pihak yang berkepentingan dalam program dimaksud. Pada pelaksanaannya evaluasi program diklat untuk koperasi mahasiswa dalam lingkungan Perguruan Tinggi Bina Bangsa Getsempena Propinsi Nanggroe Aceh Darussalam ini bermaksud mencari informasi untuk mendapatkan gambaran rancangan dan pelaksanaan program diklat perkoperasian yang telah dilaksanakan. Hasil evaluasi program diklat tersebut akan digunakan untuk mengambil keputusan tentang program diklat perkoperasian yang dimaksud. Tujuan evaluasi program pendidikan dan latihan pada koperasi mahasiswa ini untuk mengevaluasi efektivitas pelaksanaan diklat perkoperasian, serta untuk merumuskan model dan sistem evaluasi diklat perkoperasian yang ideal di koperasi mahasiswa dalam lingkungan Perguruan Tinggi Bina Bangsa Getsempena Propinsi NAD. Dalam prakteknya Diklat Perkoperasian yang pernah diselenggarakan masih memiliki sisi-sisi kekurangan. Dari sisi internal adalah kurikulum berupa materi pelatihan kurang sesuai dengan usaha koperasi mahasiswa, ketidakseimbangan antara penyampaian teori dan praktek lapangan, kompetensi pelatih/instruktur yang belum sepadan dengan kepentingan usaha kopma, rentang waktu pelatihan yang belum sejalan dengan harapan peserta. Dari sisi eksternal adalah kurangnya pemupukan modal usaha kopma pasca diklat serta minimnya program pendampingan dalam pemasaran dan penguatan jaringan kemitraan kopma terhadap sentra industri di sekitar kampus. Disamping itu pihak peserta dan instruktur mengeluhkan minimnya insentif selama pelatihan berlangsung. Pelatihan perkoperasian di masa mendatang sepatutnya merupakan hasil pilihan yang kompromi diantara berbagai kalangan mulai dari pihak penyelenggara/ instansi terkait, peserta dan pengelola koperasi mahasiswa, perguruan tinggi, LSM dan lembaga keuangan terkait. Hal tersebut didasarkan pada kenyataan bahwa elemen yang berhubungan dengan input, proses, output, outcome dan impact merupakan tahapan-tahapan yang tidak boleh lepas dari semua pihak yang terkait. Indikator keberhasilan dan kekurangberhasilan pelatihan perkoperasian bagi Kopma tidak saja ditentukan oleh tingkat pengorganisasian pelatihan selama proses belajar mengajar dalam pelatihan, akan tetapi juga oleh hasil pembinaan pasca pelatihan. Oleh karena itu Diklat Perkoperasian yang selama ini dilaksanakan oleh berbagai pihak patut diteruskan dengan melakukan berbagai penyesuaian dan perbaikan.