bluuebunny/crossref_metadata_2025 huggingface dataset:
As representações do ensino público no artigo “Escolas rudimentares” de Manoel Dantas
Authors: Morais Isabela Cristina
Published: September 2018

No Rio Grande do Norte, durante as duas primeiras décadas do século XX, o intelectual Manoel Dantas esteve à frente da Direção Geral da Instrução Pública. Devido a sua atuação enquanto Diretor e Educador, ele foi convidado pela Associação de Professores para traçar considerações sobre o ensino público na Revista Pedagogium. Este estudo está inserido na perspectiva da História Cultural, tendo como base a noção de Representação, conforme o sentido dado pelo historiador Francês Roger Chartier (2002). De modo que, tem-se como objetivo analisar as representações do ensino público apresentadas por Manoel Gomes de Medeiros Dantas no artigo “Escolas Rudimentares”, publicado em 1921, na Revista Pedagogium. Por fim, conclui-se que, ao longo do artigo, o autor apresenta vários aspectos da trajetória do ensino público no Rio Grande do Norte.  Assim sendo, percebe-se nas diferentes gestões políticas que o denominador comum era a preocupação, no que tange o desenvolvimento intelectual da população, através da instrução, conforme a leitura das representações contidas na fala. A educação ofertada aprimorou-se com a construção dos grupos escolares, e foi difundida, para os lugares mais ermos do Estado, com a instalação das escolas rudimentares. Estas escolas significaram uma opção que com menor custo e em menor espaço de tempo conseguia alfabetizar um maior número de pessoas, além de oportunizar o acesso à escola a um maior percentual de alunos como foi possível constatar a partir de dados estatísticos encontrados no artigo de Manoel Dantas.
A criação das Escolas Cenecistas no Brasil: uma abordagem histórica
Authors: Pereira Idinária Faustino , Silva Lenina Lopes Soares , Medeiros Neta Olivia Morais de
Published: September 2018

A Campanha Nacional de Escolas da Comunidade (CNEC) é uma instituição que possui uma presença significativa na educação brasileira e na política educacional. Sendo assim, nos propomos a pesquisar e analisar a história da CNEC, que começou como Campanha do Ginasiano Pobre (CGP), em Recife (PE), no ano de 1943. A pesquisa é de cunho documental e bibliográfico. O corpus documental é composto por Relatórios de atividade e publicações oficiais da CNEC. O entendimento de desenvolvimento de comunidade, educação não formal e história das instituições educativas orientam a análise da história da Campanha. O movimento para a criação da CGP originou-se no Brasil inspirado na experiência de Victor Raul Haya de La Torre, com a criação das Universidades Populares González Prada no início da década de 1920, no Peru. Felipe Tiago Gomes foi o principal protagonista e idealizador da Campanha que, junto com outros colegas universitários, resolveram preparar alunos carentes de recursos para dar continuidade aos estudos, além do ensino primário. Depois de fundar o primeiro Ginásio, resolveram expandir para todo o Brasil e chegaram ao Rio Grande do Norte em outubro de 1948. A CNEC assumiu um discurso de uma via entre o público e o privado, entre o Estado e o Mercado, embasando-se, para tanto, no mecanismo e no discurso do tema comunidade, um modelo onde as próprias pessoas da comunidade se encarregavam de administrar a Instituição.
O currículo da instrução pública primária no Império: as meninas na província do Rio Grande do Norte
Authors: Fernandes Aline Medeiros , Stamatto Maria Inês Sucupira
Published: September 2018

Apresenta a organização da instrução primária pública para meninas nas escolas de primeiras letras da província do Rio Grande do Norte durante o Império brasileiro. Teve-se como problemática: qual o currículo que fundamentou as práticas pedagógicas voltadas para a aprendizagem das meninas nesse contexto? O objetivo foi analisar o conteúdo instrucional e as expectativas de aprendizagem para meninas previstas nos atos legislativos do Rio Grande do Norte. O período delimitado para o estudo (1822-1889) compreende a formação do Estado nacional brasileiro e a necessária criação de instituições e do ordenamento jurídico para a nova nação que ainda contava com uma sociedade escravocrata e com uma instrução pública que atingia a uma minoria. No âmbito desta apreciação, orientamo-nos pela observação e análise dos dispositivos que nortearam o aparelhamento da escola primária norte-rio-grandense, considerando a natureza e intencionalidade da legislação educacional. A fundamentação pautou-se nas abordagens de Augusto Tavares de Lyra (2008), Luis da Câmara Cascudo (1955), Jacques Le Goff (1994), Leslie Maria José da Silva Rama (1987) e Maria Inês Sucupira Stamatto (1996) e (2012) sobre as percepções de História, legislações do ensino e educação norte-rio-grandense. Verificou-se que a regulamentação do estado indicou diferenciações por gênero na instrução primária, incluindo para as meninas o ensino de prendas domésticas e a limitação do ensino da disciplina Aritmética. O regulamento da criação de cadeiras mistas, para ambos os sexos, somente foi instituído no fim do Império.
Tecnologias digitais no Ensino de Física: um relato de experiência utilizando o Kahoot como ferramenta de avaliação gamificada
Authors: Cavalcante Artur Araujo , Sales Gilvandenys Leite , Silva João Batista da
Published: September 2018

Diante do aumento das pesquisas sobre a utilização da gamificação como estratégia de ensino, têm surgido alguns recursos tecnológicos que tem como propósito facilitar o uso dessa metodologia em sala de aula. Nesse sentido, este trabalho tem como objetivo descrever as potencialidades do Kahoot, um destes recursos tecnológicos, como ferramenta de avaliação em atividades gamificadas. Para alcançar esse intento, realizou-se um estudo exploratório e descritivo de uma experiência vivenciada com o uso Kahoot por alunos de Ensino Médio de uma instituição de ensino particular de Fortaleza (CE). O instrumento de coleta de dados utilizados foi um questionário de opinião utilizando a Likert de cinco pontos. Os resultados mostraram que o Kahoot apresentou um notório potencial como instrumento de avaliação em atividades gamificadas por possibilitar feedback imediato das respostas dos alunos, pontuação e ranking com classificação instantânea dos estudantes. Isto posto, foi possível concluir que o uso adequado do Kahoot, associado ao conhecimento substancial do professor sobre gamificação, poderá possibilitar que a avaliação possa ser atraente, envolvente e prazerosa para os alunos. Por fim, acredita-se que subjacente à utilização eficaz das tecnologias digitais em sala de aula deve sempre existir uma metodologia de ensino/aprendizagem adequada e consistente.
INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER AT CONSTANT HEAT FLUX ALONG A VERTICAL AND INCLINED PLATE
Authors: YILDIZ Sebiha
Published: September 2018

It is a common phenomenon that
the devices that are exposed to constant heat fluxes are cooled at natural
atmospheric environments. However, it is required to know the surface
temperature in these devices. In this study, the cooling of a plate (1 m in
height and 1 m in width) which is oriented vertical, and also 20°- and
45°-inclined from the vertical (downward-facing surface), at the constant heat
flux of 1000 Wm-2 at atmospheric natural convection conditions is
investigated. The local temperature values at the vertical center of the plate
are calculated using the correlation in Vliet [1]’s experimental study and
computer analyses and compared to those results. The results show that the
surface temperature values of the plate at the inclination angle of 45° are
relatively higher than those of the plate at the vertical state and those of
the 20°-inclined plate.
A REVIEW OF SINGLE-PHASE AND TWO-PHASE PRESSURE DROP CHARACTERISTICS AND FLOW BOILING INSTABILITIES IN MICROCHANNELS
Authors: ÖZDEMİR Mehmet Rafet
Published: September 2018

This study presents a comprehensive review on single and two-phase pressure drop characteristics and flow boiling instabilities in microchannels to outline the discrepancies in the literature. The effect of mass flux, heat flux, experimental conditions, channel geometrical parameters (hydraulic diameter, aspect ratio etc.) was surveyed critically over a broad range of literature studies including the past and recent researches. Additionally, conventional and micro-scale pressure drop correlations are discussed. This study showed that the continuum theory is applicable for single-phase pressure drop applications with some considerations. Also, the two-phase pressure drop in micro-scale was found to have similar characteristics with conventional-scale channels. On the other hand, flow boiling instability is one of the important issues in microchannel heat exchangers. Flow boiling instabilities affect the system performance and may cause system failures. Therefore, unstable flow boiling conditions were identified in this paper for a reliable design of micro heat exchangers. 
THE EFFECT OF BLOWING DIRECTION ON HEAT SINK PERFORMANCE BY THERMAL IMAGING
Authors: ABUŞKA Mesut
Published: September 2018

Heat sinks (HSs) are designed for
the mechanical, electrical and electronic components that generate heat in
considerable amount. For this purpose, an aluminum conical pin fin heat sink is
designed. Aluminum conical pin-fins geometry has been experimentally
investigated for the blowing direction (pushing or pulling) which is the energy
efficient option for the heat sink. The heat sink was tested at the same fan
power for pushing and pulling conditions for 25, 50, 75 and 100 W resistance
heater power. Designed aluminum conical pin fin heat sink can be easily used in
heat sweeping processes. It has found that pushing configuration of the fan is
more efficient for this design.
Study of good pharmacy practice in community pharmacy of three districts of Kathmandu valley, Nepal
Authors: Shrestha Rajeev , Ghale Anish
Published: September 2018

Background: Medicines are an essential component of health-care services. The community pharmacies have great value in terms of providing medicinal services in developing countries. Good Pharmacy Practice (GPP) assesses whether the medicines are safe, effective, available, and accessible and are used correctly. The objective of the study is to assess the good pharmacy practice among community pharmacy of Kathmandu, Bhaktapur and Lalitpur districts.

Methods: This was a cross-sectional prospective study. A quota sampling approach was adopted to sample 94 community pharmacies. Data on the premises, storage, prescription handling and dispensing, pharmacy services and rational use of drug were collected using pre-tested questionnaire.  

Results: The overall compliance with GPP indicators for Kathmandu, Bhaktapur and Lalitpur districts were found to be 12.81 (55.69%), 11.13 (48.39%) and 12.99 (56.48%). On structure wise study, the GPP compliance was higher in others category (Metropolitan city, Sub-metropolitan city and Municipality) i.e. 13.49 (58.65%) and 11.9 (51.74%) in VDC. The studies showed the declining involvement of pharmacists or pharmacy assistants in community pharmacy for more than eight hours a working day i.e. Lalitpur (65%), Bhaktapur (56%) and Kathmandu (59%). Antibiotic dispensing without prescription was highly practiced in Lalitpur 50% compared to Bhaktapur (44%), Kathmandu (34%).
Conclusions: It was found that all districts miserably failed to comply with the standards set by GPP particularly Bhaktapur. Pharmacies seemed to have established their place in the society more as a business entity rather than healthcare establishment.
A rare case of primary gastric tuberculosis presenting as gastric outlet obstruction mimicking malignancy
Authors: Singh Kanika , Raychaudhuri Sujata , Gole Sheetal , Aggarwal Anu
Published: September 2018

Gastric tuberculosis (TB), both primary and secondary is a rare condition. It is less common in immunocompetent individuals and in those without any antecedent pulmonary infection. The nonspecific complaints like epigastric pain, vomiting and weight loss may be confounding and lead to difficulty in diagnosis and differential diagnosis may include adenocarcinoma. We present a case of an immunocompetent male who presented with the above mentioned symptoms and on endoscopy showed an ulcerated region in the pyloric antrum with gastric outlet obstruction. A differential diagnosis of adenocarcinoma was suggested by the clinician. The endoscopic biopsy revealed granulomas and giant cells with no evidence of dysplasia. However, Ziehl-Neelson stain for acid fast bacilli was negative. The diagnosis of gastric tuberculosis was confirmed on Polymerase chain reaction (PCR) test for TB. A possibility of gastric tuberculosis should always be kept in mind in an endemic country like India with nonspecific abdominal complaints like epigastric pain, weight loss, vomiting etc. along with other differential diagnosis. A correct clinicopathological diagnosis would help in the appropriate treatment of the patient and would prevent unnecessary surgical excision.
Um Panorama da Pesquisa em Disciplinas de Estágio Supervisionado em Cursos Superiores a Distância no Brasil
Authors: Barbosa Marcelo Werneck
Published: September 2018

Este estudo teve como objetivo traçar um panorama da pesquisa sobre a disciplina Estágio Supervisionado em cursos superiores a distância no Brasil. Por meio de uma revisão da literatura, foram identificadas as principais características dos estudos realizados até os dias atuais. Foi observada a concentração de trabalhos do tipo relato de experiência; tais relatos se concentram em cursos 100% a distância, ministrados em universidades públicas, em cursos de licenciatura e formação de professores, sobretudo na área de Pedagogia. Como contribuições deste trabalho, destaca-se, além da observação desse panorama de publicações, a identificação de lacunas de pesquisa na área, como a falta de relatos da orientação de estágio em cursos da área de Gestão, em universidades particulares e ainda abrangendo a modalidade semipresencial, uma tendência para as universidades no Brasil.Palavras-chave: Educação a distância; Estágio supervisionado; Estágio curricular; Formação de professores. Research Overview of Supervised Internship Discipline in Distance Higher Education in Brazil AbstractThe objective of this study was to present an overview of the research on the Supervised Internship discipline for Distance Higher Education in Brazil. By means of a literature review, the main characteristics of the existing research were identified. The study observed a concentration of published work based on experience reports and that such reports are from 100% at distance programs, taught in public universities, at the undergraduate level, especially in the area of Pedagogy. As a contribution of this work, it can be highlighted that, besides the research overview, the study also identified research gaps, such as the lack of reports about internship orientation in the area of Business Management, in private universities, and in blended courses, which is a strong trend in distance learning in Brazil.Keywords: Distance higher Education; Supervised Internship; Teaching Preparation program.
Targeted Nanostructured Lipid Carrier for Brain Delivery of Artemisinin: Design, Preparation, Characterization, Optimization and Cell Toxicity
Authors: Emami Jaber , Yousefian Hessam , Sadeghi Hojjat
Published: September 2018

In the present study, a transferrin-conjugated nanostructured lipid carrier (TF-NLCs) for brain delivery of artemisinin (ART) was developed. ART-loaded NLCs (ART-NLCs) were prepared using solvent evaporation method and the impact of various formulation or process variables on the responses were assessed using a Taguchi design. Optimized ART-NLC was then coupled with transferrin as targeting ligand and its in vitro cytotoxicity was investigated against U-87MG brain cancer cell line. As a result, the following values are suggested by the software to prepare the optimized formulation: 20 mg Compritol®, 0.25% Tween 80, 5 mg oleic acid, 2.5 mL dichloromethane and 4 min sonication. Mean particle size (PS), zeta potential (ZP), polydispersity index (PDI), entrapment efficiency (EE), mean release time (MRT) of adopted formulation were confirmed to be 145 ± 12.5 nm, 24.3 ± 1.5 mV, 0.513 ± 0.021, 82.3 ± 7.3 % and 24.0 ± 1.1 h, respectively. Following conjugation of optimized ART-NLCs with TF, PS and MRT were increased, while ZP, and EE were decreased significantly. TF-ART-NLCs showed higher cytotoxic activity compared to non-targeted NLCs and free drug. These results indicated that the TF-ART-NLCs could potentially be exploited as a delivery system for anticancer and antimalarial drug ART in brain tumors and malaria.
Solar-Based Thermoelectric Generator and its ANFIS Model
Authors: ÖZDEMİR Ali Ekber
Published: September 2018

In this work, it is
aimed to construct an Adaptive Neuro Fuzzy Inference System (ANFIS) model using
the experimental values of our previous work on solar heating with wind chimney
thermoelectric generator and to predict the generated open circuit voltage of
experimental system under variable conditions. The ANFIS model constructed
makes use of input parameters such as local radiation intensity on solar
collector tube (W), ambiance temperature oC and average wind
velocity in the chimney (m/s). Open circuit voltage (V) is denoted as output.
Selected experimental data sets are used in training and testing procedures to
accomplish the model required. Assessment of the outcomes of the study reveals
that the proposed modeling by ANFIS is consistent and validated by the
experimental results. Promising results show that ANFIS model can be used to
estimate the output parameter of solar-based generator (the open circuit
voltage) correctly and this result can use enhancing of presented system.  Employment of artificial neural networks on
renewable energy systems is a rather new area of study. Hence, continuing work
via neural network structures will be related to the optimization and
improvement of these generators for useful energy producing.
Examination of Factors Affecting the Shear Strength of Granulated Blast Furnace Slag
Authors: PULAT Hasan Fırat , DEVELİOĞLU İnci , RASUL Azhi Yassin
Published: September 2018

Blast furnace slag (BFS) is an
alternative material used in various civil engineering functions, such as stabilization
of problematic soils, ready mixed concrete production, road and foundation
construction and fill material. In this study the geotechnical index properties
and shear strength behaviour of Granulated Blast Furnace Slag (GBFS) were
determined for fine, medium and coarse grained samples at loose, medium and
dense  densities. The sieve analysis was
performed and GBFS was divided in three sections; coarse (4.75 mm - 2 mm),
medium (2 – 0.425 mm) and fine grained (< 0.425 mm) samples. The
consolidated drained direct shear tests were conducted with saturated samples
at a shear rate of 0.20 mm/min. The test results have shown that GBFS had
comparatively higher specific gravity than usual soils (3.0 – 3.4). GBFS was
basic (pH >7) and non- plastic characteristic (NP). The maximum shear stress
of the samples was obtained at 5% - 10% axial deformation range. The internal
friction angle of fine, medium and coarse grained samples were with in the
range of 14° - 33°, 27° - 42° and 46° - 50°, respectively. The highest internal
friction angle for fine and medium grained samples were obtained for dense
samples. Increment of density affects the internal friction angles of
medium grained samples positively. However, no significant change in the
internal friction angle of the coarse grained samples was observed. The cohesion of GBFS samples ranged between 7 and 39 kPa.
Recurrence Quantification Analysis on Gait Reaction Forces of Elderly Adults for Determination of Pathological States
Authors: AFŞAR Özgür
Published: September 2018

A better classification between patients with
parkinson disease and healthy adults is of great importance for clinicians and
directly affects the selection of treatment method, the adjustment of
medication dose, or even the decision about a dopaminergic therapy. Clinicians
widely use semi-objective/subjective assessments in order to be able to differ
patients from healthy adults. Here, to make an objective classification between
two distinct groups (healthy/patient), we apply a powerful method, recurrence
quantification analysis, on data including trajectory behavior of gait reaction
forces with long length collected from elderly patients with Parkinson disease
and healthy adults as they walk. We show that the complexity measures of the
quantification analysis, determinism, entropy and divergence, behave different
for two distinct groups (healthy/patients) and may be used for an objective
classification.
Effect of Tannic Acid on Photocatalytic Efficiency of NiFe2O4 and ZnO
Authors: ATACAN Keziban
Published: September 2018

ZnO, NiFe2O4, NiFe2O4/TA
and NiFe2O4/TA/ZnO photocatalyts were successfully
synthesized and characterized, and they demonstrated significant photocatalytic
efficiency under visible-light. The photodegradation rates of congo red (CR)
are 35.7%, 19.4%, 25.5% and 91.1% over the ZnO, NiFe2O4,
NiFe2O4/TA and NiFe2O4/TA/ZnO for
180 min, respectively. The results display that the NiFe2O4/TA/ZnO
has the most excellent photocatalytic efficiency for CR among to the other
photocatalysts. Furthermore, NiFe2O4/TA/ZnO may be
separated easily from solution by magnet because of the magnetic property of
NiFe2O4. The considerable increment in efficiency of NiFe2O4/TA/ZnO
can be attributed to synergistic effects between NiFe2O4,
the tannic acid (TA) and ZnO, which extend lifetime and hinder the
recombination of photogenerated charge carriers. This work presents new
perspectives on the use of tannic acid based magnetic photocatalysts in
wastewater treatment.
GREEN CHEMICAL SYNTHESIS AND PROPERTIES OF SOLID DISPERSIONS OF BENZIMIDAZOLE –Β. NAPHTHOL BINARY DRUG SYSTEM
Authors: Shekhar H. , Kumar Manoj
Published: September 2018

With a view to synthesize and characterize the enhanced pharmaceutical properties of the solid-liquid dispersions of binary drug system through a green chemical technique, the present communication have been undertaken for detailed investigation of thermodynamic and interfacial properties of benzimidazole (BI) and β. naphthol (βN) binary eutectic and non-eutectic drug dispersions. Eutectic solid dispersion was observed at 0.657-mole fraction of β. naphthol (βN) and at melting temperature 90°C. Thermodynamic quantities; Partial and Integral excess Gibbs energy (gE), excess enthalpy (hE), excess entropy (sE) of eutectic and non-eutectic dispersions were determined with the help of activity coefficient data. The negative deviation from ideal behaviour has been seen in the system which refers to a stronger association between unlike molecules during the formation of the binary mix. The negative value of Gibbs free energy of mixing (DGM) refers to the mixing for all eutectic and non-eutectic dispersions are spontaneous. The solid-liquid interfacial characteristics i.e., the entropy of fusion per unit volume (DSV), solid-liquid interfacial energy (s), roughness parameter (α), grain boundary energy and roughness parameter (α) of eutectic and non-eutectic solid dispersions have been reported. The size of the critical nucleus at different undercooling has been found in nanoscale, which may be a big significance in the pharmaceutical world. The value of roughness parameter, α > 2 was observed which manifests the faceted and irregular growth leads in the system.
A Deadbeat Controller for Doubly-Fed Induction Generator Power Control
Authors: Filho Alfeu J. Sguarezi , Azcue P. J. L. , Barros T. A. S. , Filho M. E. Oliveira , Ruppert E.
Published: September 2018

A deadbeat power control scheme for doubly-fed induction generator for variable speed was proposed. The deadbeat controller algorithm calculates the voltage vector to be supplied to the rotor in order to eliminate the active and reactive power errors in each period using and stator field orientation and the doublyfed induction generator dynamic model. The deadbeat controller uses the rotor current control to the power control of the machine. This control technique can be applied to the wind energy systems. Experimental results are carried out to validate of the deadbeat controller operation.
Inversor de Tensão Monofásico NPC Três Níveis com Snubber Regenerativo
Authors: Lima Luiz Ricardo , Novaes Yales Rômulo de , Mezaroba Marcello
Published: September 2018

Esse artigo apresenta a análise de um inversor de tensão NPC três níveis que utiliza o snubber de Undeland modificado com um circuito de regeneração de energia. Para a regeneração, foi utilizado o conversor Buck-boost QSC (Quasi-Square wave Converter) ZVS (Zero Voltage Switching). O conversor Buck-boost retira energia do capacitor de grampeamento do snubber e devolve essa energia para o barramento de entrada. Esse conversor ressonante apresenta uma única chave ativa e opera com razão cíclica fixa. São apresentadas as etapas de operação, formas de onda teóricas e uma metodologia de projeto. Resultados experimentais de um protótipo de 1,5 kVA são mostrados como validação da estrutura proposta.
Direct Power Control of a Doubly Fed Induction Generator By Using A Neuro-fuzzy Controller
Authors: Jacomini Rog´erio Vani , Bim Edson
Published: September 2018

In this article, a direct power control strategy for a doubly fed induction generation is presented. The control variables -- d-axis and q-axis rotor voltages -- are determined through a control system that consists of a neuro-fuzzy inference system and a Takagi- Sugeno fuzzy logic controller of first order. The input variables of the control system are the rotor speed, active and reactive power references, and their respective errors. Constant converter switching frequency is achieved, what eases the design of ac harmonic filter and reduced the power loss in the power converter. Another features are the rotor current-sensorless operation, lower cost implementation and the gain of reliability. To validate the strategy, simulation and experimental results are presented for abrupt and linear variations of active and reactive power.
Gerador a Relutância Variável Operando no Modo Auto-excitado
Authors: Bernardeli V. R. , Andrade D. A. , Silveira A. W. F. V. , Gomes L. C. , Viajante G. P.
Published: September 2018

Neste artigo é apresentado um estudo sobre o comportamento do gerador a relutância variável operando no modo auto excitado (GRVA). É realizado um extenso levantamento bibliográfico sobre o GRVA, e apresentada modelagem matemática que inclui a saturação do circuito magnético para representar a máquina. Aspectos da operação dinâmica da máquina a relutância variável trabalhando como gerador auto excitado são explorados. Um capacitor carregado com uma tensão inicial, instalado em paralelo com a carga é utilizado como fonte de energia para a excitação da máquina. O gerador entrega à carga tensão e corrente CC. O conjunto completo é simulado utilizando o ambiente MatLab/Simulink® e resultados experimentais são incluídos para validar as discussões apresentadas.
Deriving The Canonical Equivalent Circuit For Small Signal & Low Frequency Ac Model For The Sepic And Zeta PWM Dc-dc Converters With Two-port Network
Authors: Kassick Enio V.
Published: September 2018

PWM dc-dc converters operating in Continuous Conduction Mode (CCM) perform similar basic functions despite the topology of which one. The canonical equivalent circuit of small signal & low frequency ac model permits to analyze converter behavior in a general manner, without the need to make reference to a specific topology. For Buck, Boost, Buck-Boost and Cuk topologies the “plug-in” parameters of the canonical model can be easily found just by circuit manipulation using very simple circuit analysis techniques. For the Sepic (Single-Ended Primary Inductor Converter) and Zeta topologies, utilization of the same procedure fails and one cannot arrive to the canonical model. To overcome this barrier, some authors indicate the need to apply circuit synthesis techniques which are not always familiar to many engineers. It will be shown that it is possible to arrive to the canonical model of this two converter topologies by using the well-known two-port network (quadripoles) circuit analysis technique.
Two Digital-scalar PWM Schemes for Generating  ree-phase Unbalanced Voltages
Authors: Fernandes Darlan A. , Jr Euzeli C. Santos , Costa Fabiano F. , Castro Alexandre C.
Published: September 2018

This paper presents two modulation approaches for generating unbalanced voltages by means of four-leg voltage source inverters (VSI). The first modulation is an extended scheme of a digital scalar pulse width modulation previously proposed for controlling three-leg inverters. The second one is based on the decomposition of the voltage reference signals into their symmetrical components. The schemes are compared theoretically, by simulations and by experimental results. As consequence, it is found out a total equivalence between the two modulations despite their different inspirations. The fundamentals of both techniques and a mathematical proof of their equality are unfolded. Also, the performance of the techniques with respect to the harmonic distortion and power switching loss are discussed. The results show that the techniques are effective.
Dual-output DC-DC buck converter
Authors: Cipriano dos Santos Júnior Euzeli
Published: September 2018

This paper presents a single-input double-output synchronous dc-dc buck converter, for applications that demand two dc controlled output voltages. The proposed converter presents a component count reduction and it is considered as a monolithic device with both output voltages generated by the same integrated power converter. Besides the proposal of the suitable power converter, this paper presents its model, control strategy, modulation approach, and design technique. Selected simulated and experimental results are presented as well.
Uma Estratégia para Obtenção dos Limites de Suportabilidade Dielétrica e Térmica de Equipamentos com Foco aos Pedidos de Indenização por Danos
Authors: Gondim Isaque Nogueira , Junior João Areis Ferreira Barbosa , Oliveira José Carlos de , Tavares Carlos Eduardo , Delaiba Antônio Carlos
Published: September 2018

O presente artigo contempla o estabelecimento de procedimentos destinados à obtenção de expressões matemáticas para os limites de suportabilidade dielétricos e térmicos para equipamentos eletroeletrônicos, informações estas relevantes para os processos de análise de pedidos de indenização por danos elétricos. Os trabalhos encontram-se centrados em aparelhos televisores, de som e microcomputadores e envolvem uma estratégia laboratorial para realização de ensaios, à nível destrutivo, para a extração de informações requeridas pelos modelos propostos. Tais resultados encontram-se em consonância com os requisitos impostos pelos processos de análise, computacionais ou não, da consistência dos nexos causais entre distúrbios manifestados nas redes e eventuais danos físicos ocorridos nos produtos. A aplicabilidade do processo e dos resultados se justifica pelos crescentes interesses para a implementação de procedimentos sistematizados ao processo decisório dos requerimentos de indenização. Os resultados obtidos são, por fim, correlacionados com propostas atualmente disponibilizadas pela literatura.
Herramientas de software matemático para la enseñanza de números complejos
Authors: Esguerra-Prieto Brayan , González-Garzón Natalia , Acosta-López Alberto
Published: September 2018

El artículo propone un método para enseñar los números complejos y sus correspondientes operaciones mediante herramientas de software matemático. Inicialmente se presentan las herramientas MATLAB, cuya licencia es de pago, y GeoGebra, que es un software libre. En la segunda parte se explica el procedimiento para definir las representaciones de las operaciones básicas (adición, diferencia, multiplicación y división) y complementarias (módulo y conjugado, raíces, forma polar) del sistema numérico de los números complejos, usando cada una de las dos herramientas y utilizando una serie de ejercicios propuestos. Finalmente, se diferencian las cualidades evidenciadas durante el desarrollo de los ejercicios y su trascendencia en la enseñanza y aprendizaje.
OPTIMASI PENDISTRIBUSIAN BARANG FARMASI MENGGUNAKAN ALGORITMA GENETIKA
Authors: Ramadhani Febri , Fathurrachman Ficry Agam , Fitriawanti Restu , Rongre Angki Christiawan , Wijayaningrum Vivi Nur
Published: September 2018

Distribution is an activity of distributing goods from factory to agents. Distribution process is considered efficient if the process of distribution of goods done with a minimal distance, so that the time and cost required for the distribution process will also be smaller. Genetic algorithm is used to optimize the pharmaceutical goods distribution process by finding the order of agents that each vehicle must visit during the distribution process. The data used is the cost and distance data between factory and each agent. One-cut point method is used for crossover process, reciprocal exchange method is used for mutation process, and elitism method for selection process. Based on the test result that has been done, the optimal parameters which are used to produce the best solution, such as the population size is 45, the generation number is 70, and the combination of cr and mr is 0.8 and 0.3. By using the best parameters, the resulting fitness value is in the range 0.014909 up to 0.017642.

Keywords: Genetic Algorithm, Distribution, Pharmaceutical, Optimization

Distribusi merupakan kegiatan menyalurkan barang dari pabrik ke agen. Proses distribusi dianggap efisien jika proses penyaluran barang dilakukan dengan jarak yang minimal, sehingga waktu dan biaya yang dibutuhkan untuk proses distribusi juga akan semakin kecil. Algoritma genetika digunakan untuk melakukan optimasi pada proses distribusi barang farmasi dengan mencari solusi berupa urutan agen yang harus dikunjungi oleh setiap kendaraan saat proses distribusi. Data yang digunakan adalah data biaya dan jarak antara pabrik dengan masing-masing agen. Metode one-cut point digunakan untuk proses crossover, metode reciprocal exchange digunakan untuk proses mutasi, dan metode elitism untuk proses seleksi. Berdasarkan hasil pengujian yang telah dilakukan, parameter optimal yang digunakan untuk menghasilkan solusi terbaik, antara lain ukuran populasi sebanyak 45, generasi sebanyak 70, serta kombinasi cr dan mr yaitu 0.8 dan 0.3. Dengan menggunakan parameter terbaik tersebut, nilai fitness yang dihasilkan berada pada rentang 0.014909 sampai dengan 0.017642.

Kata kunci: Algoritma Genetika, Distribusi, Farmasi, Optimasi
PENERAPAN METODE K-MEANS UNTUK PEMETAAN CALON PENERIMA JAMKESDA
Authors: Waworuntu M. Nanda Variestha , Faisal Amin Muhammad
Published: September 2018

Kelurahan Kemuning, one of the Social Welfare Section, there is poor community service to receive Regional Health Insurance. During this section of Social Welfare Section in Kelurahan Kemuning, there is no method that can classify the level of poverty so that the beneficiaries on target, so the Kelurahan can't prevent the inaccuracies. Therefore, poverty grouping can assist Kelurahan in making the right decision to prevent the inaccuracies of recipients of Regional Health Insurance. In this research, the application of the k-means method is implemented in an application made with 2 clusters. This study uses as many as 440 data samples. From result of calculation of Davies Bouldin Index obtained value determination of cluster amount with value 2 cluster (0,243), 3 cluster (0,256), 4 cluster (0,275). The value used is 2 clusters because the value is close to 0.

Keywords: : data mining, k-means, poverty, davies bouldin index 

Pada Kelurahan Kemuning salah satunya Seksi Kesejahteraan Sosial (KESSOS) terdapat pelayanan masyarakat miskin untuk menerima bantuan Jaminan Kesehatan Daerah (JAMKESDA). Selama ini bagian Seksi KESSOS pada Kelurahan Kemuning belum ada metode yang dapat mengelompokkan tingkat kemiskinan agar penerima bantuan tepat sasaran, sehingga pihak Kelurahan tidak dapat mencegah ketidaktepatsasaran tersebut. Oleh sebab itu, pengelompokan kemisikinan dapat membantu pihak Kelurahan dalam mengambil keputusan yang tepat untuk mencegah ketidaktepatsasaran penerima JAMKESDA. Pada penelitian ini, penerapan metode K-Means diimplementasikan pada aplikasi yang dibuat dengan 2 klaster. Penelitian ini menggunakan sebanyak 440 sampel data. Dari hasil perhitungan Davies Bouldin Index diperoleh nilai penentuan jumlah cluster dengan nilai 2 klaster (0.243), 3 klaster (0.256), 4 klaster (0.275). Nilai yang digunakan adalah 2 klaster karena nilai tersebut mendekati 0.
Kata kunci: data mining, k-means, kemiskinan, davies bouldin index
RANCANG BANGUN ALAT UKUR PANJANG KAKI DAN PENENTU STOK SEPATU YANG TERSEDIA SECARA DIGITAL MENGGUNAKAN ARDUINO MEGA 2560 BERBASIS WEBSITE
Authors: Hermawan Asep , Muid Abdul , Nirmala Irma
Published: September 2018

Shoes have become a necessity and human lifestyle in keeping with the times. The main function of the shoe is to protect the foot from being injured due to environmental conditions. Shoe size is also a factor that influences the safety and comfort of activities so that the right size shoes are needed.For the sake of comfort in doing activities, shoes with the right size are needed to reduce injury. Some foot injuries can be caused due to incorrect selection of shoes so that they have a bad impact on the feet. To answer these problem, digital foot length measuring device will be made in this study using LDR sensor and diodesIn addition, this device can also recommend the right shoe sizes from various shoe brands available on the website page. To connect supporting software and hardware it will be managed by Arduino MEGA. Test results on 40 samples indicate that the system can recommend shoe sizes to users with a high level of suitability. Digital device test results obtained difference between 0cm - 1cm with a tolerance value of 1cm. On manual measurements of user's foot length and shoe size obtained a difference between 0,4cm – 1,5cm with a tolerance value of 1,5cm.

Keywords: Shoe Size, LDR Sensor, Arduino MEGA, Website 

Sepatu sudah menjadi kebutuhan dan gaya hidup manusia dalam mengikuti perkembangan zaman. Fungsi utama sepatu adalah melindungi kaki agar tidak cedera karena kondisi lingkungan. Ukuran sepatu juga menjadi faktor yang mempengaruhi keamanan dan kenyamanan dalam beraktivitas sehingga  dibutuhkan sepatu dengan ukuran yang tepat. Beberapa cedera kaki dapat disebabkan  karena salah dalam pemilihan ukuran sepatu sehingga berdampak buruk bagi kaki. Untuk menjawab permasalahan tersebut, dalam penelitian ini direalisasikan alat ukur panjang telapak kaki secara digital menggunakan sensor LDR dan Dioda. Selain itu alat ini juga dapat merekomendasikan ukuran sepatu yang tepat dari berbagai merek sepatu yang tersedia di halaman website. Untuk menghubungkan perangkat lunak dan perangkat keras pendukung maka akan diatur oleh Arduino MEGA. Hasil pengujian pada 40 sampel menunjukkan bahwa sistem dapat merekomendasikan ukuran sepatu kepada pengguna dengan tingkat kesesuaian yang tinggi. Pengujian alat digital diperoleh selisih antara 0cm – 1cm dengan nilai toleransi sebesar 1cm. Untuk pengukuran manual panjang kaki dan ukuran sepatu pengguna didapatkan selisih antara 0,4cm – 1,5cm dengan nilai toleransi sebesar 1,5cm.

Kata kunci : Ukuran Sepatu, Sensor LDR, Arduino MEGA, Website
RİCARDO'NUN KARŞILAŞTIRMALI ÜSTÜNLÜKLER TEORİSİ: TÜRKİYE, KOLOMBİYA VE GÜNEY KORE ÜÇLÜSÜNÜN SEKTÖREL BAZDA UYGULAMALI BİR ANALİZİ - RICARDO'S COMPARATIVE ADVANTAGES THEORY: AN APPLIED ANALYSIS ON THE SECTORAL BASIS IN THE TRIPARTITE OF TURKEY, COLOMBIA AND SOUTH KOREA
Authors: TOPUZ Hüseyin , COŞKUN Artuğ
Published: September 2018

Bu çalışmanın amacı, Kore, Türkiye ve Kolombiya'dan oluşan 3
ülkenin tarım, sanayi ve hizmet sektörlerini basitleştirilmiş 3*3 modeliyle
analiz ederek, Ricardo'nın Karşılaştırmalı Üstünlükler Modeli'nin gerçek
hayatta nasıl çalıştığını göstermektir. Bu amaçla konunun daha iyi anlaşılması
için ilk olarak model hakkında genel bir bilgi verilmiştir. Adam Smith'in
Mutlak Üstünlük ve Ricardo'nun Karşılaştırmalı Üstünlükler Teorisinden genişçe
bahsedilmiştir. Sonraki adımda ise Türkiye, Kolombiya ve Güney Kore ülkelerinin
2009-2015 yılları arasındaki işgücü ve ihracat verileri incelenerek, gerekli
hesaplamalarla tarım, sanayi ve hizmet sektörlerinin karşılaştırmalı üstünlük
verilerine ulaşılması hedeflendi. Son bölümde Ricardo'nun Karşılaştırmalı
Üstünlükler Teorisi'nin bu açılımda genel bir eleştirisi yapılarak, sonuç
bölümüyle çalışma tamamlanmıştır.
Developing a Business Plan for a Library Publishing Program
Authors: McCready Kate , Molls Emma
Published: September 2018

Over the last twenty years, library publishing has emerged in higher education as a new class of publisher. Conceived as a response to commercial publishing practices that have strained library budgets and prevented scholars from openly licensing and sharing their works, library publishing is both a local service program and a broader movement to disrupt the current scholarly publishing arena. It is growing both in numbers of publishers and numbers of works produced. The commercial publishing framework which determines the viability of monetizing a product is not necessarily applicable for library publishers who exist as a common good to address the needs of their academic communities. Like any business venture, however, library publishers must develop a clear service model and business plan in order to create shared expectations for funding streams, quality markers, as well as technical and staff capacity. As the field is maturing from experimental projects to full programs, library publishers are formalizing their offerings and limitations. The anatomy of a library publishing business plan is presented and includes the principles of the program, scope of services, and staffing and governance requirements. Other aspects include production policies, financial structures, and measures of success.
Moringa Oleifera L. Extracts as Bioactive Ingredients That Increasing Safety of Body Wash Cosmetics
Authors: Nizioł-Łukaszewska Zofia , Furman-Toczek Dominika , Bujak Tomasz , Wasilewski Tomasz
Published: September 2018

Extracts obtained from leaves of Moringa tree (Moringa oleifera) are a rich source of many bioactive compounds: flavonoids, phenolic acids or carotenoids. It also contains such components as, vitamins (A, C, niacin, pantothenic acid), alkaloids, tannins or saponins. Extracts and plant substances derived from the leaves of Moringa oleifera L. have a strong antioxidant, toning and anti-inflammatory effect. The work attempts to obtain a multifunctional plant extract derived from Moringa tree leaves. Obtained extracts was analyzed for their biochemical and physicochemical properties. The obtained results indicate on a strong antioxidative potential of the tested extracts. The further step was an attempt to apply the extracts in the model body wash cosmetic. The biological activity of extracts and model cosmetic formulation were assayed by in vitro analysis on two human cell lines: keratinocytes (HaCat,) and fibroblasts (BJ). The results showed that the tested extracts may affect on increasing of cell proliferation and reduce oxidative stress in cells. The addition of the tested extracts to the model cosmetic formulation, were contributed to the reduction of their ability to irritate the skin and improve the safety of use of the product.
Estimation of the Onset of Crack Growth in Ductile Materials
Authors: Neimitz Andrzej , Galkiewicz Jaroslaw , Lipiec Sebastian , Dzioba Ihor
Published: September 2018

In this paper, the ductile fracture mechanism is discussed. The results of the numerical and experimental analyses are used to estimate of the onset of the crack front growth . It is assumed that the ductile fracture in front of the crack starts at the location along the crack front where the accumulated effective plastic strain reaches a critical value. It is also assumed that the critical effective plastic strain depends on the stress triaxiality and the Lode angle. The experimental programme was performed using five different specimen geometries, three different materials and three different temperatures of +20°C, -20°C and -50°C. Using the experimental data and the results of the finite element computations, the critical effective plastic strains are determined for each material and each temperature. However, before the critical effective plastic strain is determined, a careful calibration of the stress–strain curves was performed after modification of the Bai–Wierzbicki procedure. Finally, by analysing the experimental results recorded during the interrupted fracture tests and scanning microscopy observations, the research hypothesis is verified.
Study on the Preferred Application-Oriented Index for Mental Fatigue Detection
Authors: Duan Tianhong , Zhang Nong , Li Kaiway , Hou Xuelin , Pei Jun
Published: September 2018

Most of the research of mental fatigue evaluation mainly concentrated on some indexes that require sophisticate and large instruments which make the detection of mental fatigue cumbersome, time-consuming, and difficult to apply on a large scale. A quick and sensitive mental fatigue detection index is necessary so that mental workers can be alerted in time and take corresponding countermeasures. But to date, no studies have compared the sensitivity of common objective evaluation indexes. To solve these problems this study recruited 56 human subjects. These subjects were evaluated using six fatigue indexes: the Stanford sleepiness scale, digital span, digital decoding, short-term memory, critical flicker fusion frequency (CFF), and speed perception deviation. The results of fatigue tests before and after mental fatigue were compared, and a one-way analysis of variance (ANOVA) was performed on the speed perception deviation. The result indicated the significance of this index. Considering individual differences, the relative fatigue index (RFI) was proposed to compare the sensitivity of the indexes. The results showed that when the self-rated fatigue grade changed from non-fatigue to mild fatigue, the ranges of RFI values for digital span, digital decoding, short-term memory and CFF were 0.175–0.258, 0.194–0.316, 0.068–0.139, and 0.055–0.075, respectively. Correspondingly, when the self-rated fatigue grade changed from non-fatigue to severe fatigue, the ranges of RFI values for the above indexes were 0.175–0.258, 0.194–0.316, 0.068–0.139, and 0.055–0.075, respectively. These results suggest that the sensitivity of the digital decoding, digital span, short-term memory, and CFF decreased sequentially when the self-evaluated fatigue grade changed from no fatigue to mild or severe fatigue. The RFI individuality of the speed perception deviation is highly variable and is not suitable as an evaluation index. In mental fatigue testing, digital decoding testing can provide faster, more convenient, and more accurate results.