bluuebunny/crossref_metadata_2025 huggingface dataset:
INFLUENCE OF GRAIN SIZE ON SEISMIC SIGNALS: A PHYSICAL MODELING STUDY
Authors: Silva Jhonnes Pin , Ceia Marco Antônio Rodrigues de , Misságia Roseane Marchezi , Silva Adalto Oliveira da
Published: March 2017

ABSTRACT. The most common method used worldwide for reservoir characterization is seismic reflection, which is sensible to variations in lithology and fluidcontent. However, the seismic signals are also affected by pressure, pore geometry and bedding shape. Grain size, especially in unconsolidated sediments, can alsoinfluence the propagation of these seismic signals, once it can determine the pore size distribution and porosity. This paper presents a physical modeling study of thevariation in seismic responses due to differences in grain size. The experiments were conducted using ultrasonic signals to perform seismic surveys on a Plexiglas blockwith a wedge-type cavity to simulate a reservoir. Those surveys were conducted with the reservoir filled with four different contents, one containing only the fluid phaseand the other three representing an unconsolidated medium characterized by three different grain sizes saturated with the same fluid phase. The results showed how theseismic images, amplitudes, velocities, reflectivities and attenuation can be affected by the grain size.Keywords: P-wave velocity, unconsolidated media, seismic wave attenuation. RESUMO. O método mais comumente usado no mundo para caracterização de reservatórios é a sísmica de reflexão, que é sensível a variações na litologia e conteúdo líquido. No entanto, os sinais sísmicos também são afetados pela pressão, geometria dos poros e por outros fatores. O tamanho de grãos, especialmente nos sedimentosinconsolidados, pode também influenciar a propagação destes sinais sísmicos, uma vez que é possível determinar a distribuição do tamanho dos poros e porosidade. Este trabalho apresenta um estudo de modelagem física na variação das respostas sísmicas devido à variação do tamanho de grão. Os experimentos foram conduzidos utilizando sinais de ultrassom para realizar levantamentos sísmicos em um bloco de acrílico com uma cavidade tipo cunha para simular um reservatório. Esses estudos foram realizados com o reservatório preenchido com quatro conteúdos diferentes, um contendo apenas a fase de fluido e os outros três representam um meio não consolidado caracterizado por três granulometrias diferentes saturado com a mesma fase de fluido. Os resultados mostraram como as imagens sísmicas, amplitudes, velocidades, refletividades e atenuação podem ser afetadas pelo tamanho de grão.Palavras-chave: velocidade de ondas-P, meio inconsolidado, atenuação da onda sísmica.
ANALYSIS OF A LINEAR SCHEME FOR ESTIMATION OF LOCAL ANISOTROPY FROM P-WAVE DATA IN MULTI-AZIMUTH VSP SURVEYS
Authors: Macambira Raiza De Nazaré Assunção , Gomes Ellen De Nazaré Souza , Barreto Adriano César Rodrigues
Published: March 2017

ABSTRACT. This study presents an analysis of the linear inversion scheme for estimating anisotropy in the neighborhood of a receiver placed in a well using thevertical components of the slowness and polarization vectors of P-waves measured in multi-azimuth walkaway vertical seismic profile (VSP) surveys. Independently ofthe medium above the geophone (homogeneous or heterogeneous) and the shape of the well (directional or curved, vertical or sloped), an inversion is performed froma first-order approximation around a reference isotropic medium. The analysis of the inversion scheme considers factors such as the noise level of the data, the type ofP-wave, the degree of the anisotropy of the medium, the choice of parameters in the reference isotropic medium and the degree of heterogeneity of the medium.Keywords: anisotropy estimation, multi-azimuth walkaway VSP data, weak anisotropy.RESUMO. Neste trabalho é apresentada uma análise do esquema de inversão linear para a estimativa de anisotropia na vizinhança de um receptor situado em um poço a partir da componente vertical do vetor de vagarosidade e do vetor de polarização das ondas P medidos em experimentos de VSP walkaway multiazimutal. Independente do meio acima do geofone (homogêneo ou heterogêneo) e da geometria do poço (inclinado, reto ou curvo), a inversão é feita a partir de uma aproximação de primeira ordem em torno de um meio isotrópico de referência. O esquema de inversão é analisado considerando diferente fatores, tais como: nível de ruído nos dados, tipo deonda P, grau de anisotropia do meio, escolha dos parâmetros no meio isotrópico de referência e grau de heterogeneidade do meio.Palavras-chave: estimativa de anisotropia local, dados de VSP walkaway multiazimutal, fraca anisotropia.
Sumário
Authors: SBGf Sociedade Brasileira de Geofísica
Published: March 2017

Sumário RBGf 33.1
MAGNETIC SUSCEPTIBILITY AND GAMMA-RAY SPECTROMETRY ON DRILL CORE: LITHOTYPE CHARACTERIZATION AND 3D ORE MODELING OF THE MORRO DO PADRE NIOBIUM DEPOSIT, GOIÁS, BRAZIL
Authors: Jácomo Marta Henriques , Brod Tereza Cristina Junqueira , Pires Augusto Cesar Bittencourt , Brod José Affonso , Palmieri Matheus , De Melo Saulo Sampaio Vaz
Published: March 2017

ABSTRACT. The Morro do Padre niobium Deposit, in the Late-Cretaceous Catal˜ao 2 alkaline-carbonatite complex, central Brazil, consists of stockworks of nelsonite and carbonatite dykes intruded into Precambrian phyllites, quartzites, and amphibolites. A gamma-ray spectrometry and magnetic susceptibility petrophysical survey was conducted on the cores of 73 drill holes in fresh-rock, producing a total of 1295 geophysical samples. Nelsonite, the host rock of the niobium mineralization in the Morro do Padre Deposit, has a characteristic geophysical signature, with higher gamma-ray spectrometry counting rates and magnetic susceptibility values, compared to other rock types. The studied nelsonites may be divided into N1 and N2 types. N2 nelsonite is richer in K, U and Th than N1. Carbonatites are divided into magnetic (C1) and nonmagnetic (C2) varieties. The nonmagnetic carbonatites can be subdivided into C2a and C2b. The C2a carbonatite is richer in K, U and Th than C2b, which is consistent with the presence of apatite and/or monazite in the former. The geophysical 3Dmodeling has shown that the main mineralized body is elongated in the E-W direction. It is about 100 m wide and 300 m long with a maximum depth of approximately 850 m reached by drilling.Keywords: 3D ore modeling, niobium ore, applied geophysics, alkaline rocks, nelsonite. RESUMO. O depósito de nióbio do Morro do Padre no complexo carbonatítico alcalino de Catalão 2 do Cretáceo Superior, região central do Brasil, consiste em stockworks de nelsonito e diques de carbonatito intrudidos em filitos pré-cambrianos, quartzitos e anfibolitos. A pesquisa petrofísica de gamaespectrometria e de susceptibilidade magnética foi realizada em testemunhos de 73 furos de sondagem em rocha fresca, produzindo um total de 1.295 amostras. Nelsonito, a rocha hospedeira da mineralização de nióbio no depósito Morro do Padre, tem uma assinatura geofisica característica, com maiores taxas de radiação gamaespectrométrica e maiores valores de susceptibilidade magnética em comparação com outros tipos de rochas. Os nelsonitos estudados podem ser divididos em N1 e N2. O nelsonito N2 é mais rico em K, U e Th do que o N1. Carbonatitos são divididos em magnéticos (C1) e não magnéticos (C2). Os carbonatitos não magnéticos podem ser subdivididos em C2a e C2b. O carbonatito C2a é mais rico em K, U e Th do que o C2b, o que é consistente com a presença de apatita e/ou monazita na composição minerológica. O modelamento 3D revela um corpo principal de nelsonito mineralizado, alongado segundo a direção E-W. Este é cerca de 100 m de largura e 300 m de comprimento, com uma profundidade máxima de 850 m.Palavras-chave: modelamento 3D de minério, minério de nióbio, geofísica aplicada, rochas alcalinas, nelsonito.
A STUDY OF THE ELASTIC BEHAVIOUR PRESENTED BY DIFFERENT TYPES OF SEDIMENTARY ROCKS
Authors: Castro Ana Paula O. , Alves Eliane Da Costa , Vasquez Guilherme F.
Published: March 2017

ABSTRACT. The purpose of this paper is to study the elastic behavior of the different kinds of sedimentary rocks from outcrops of the Middle-West region of the United States of America, among those, Berea sandstone from Bedford formation (Ohio), Indiana limestone from Salem formation (Indiana) and Silurian dolomite from Thornton formation (Illinois). To do so, it has been made in the Laboratório de Física de Rochas from Cenpes (Centro de Pesquisas e Desenvolvimento da Petrobras ), measurements of porosity, density and elastic wave propagation velocity presented by each type of studied rock. The wave propagation velocities were estimated by measuring the transit time ultrasonic pulses transmitted through the samples. From the results obtained, it was possible to compare the measured velocities with predictions from theoretical models, as well as to observe correlations between the petrophysical properties of rocks and its seismic behavior. Understanding these correlations helps to improve the interpretation of geophysical measurements and to improve the seismic method, which in turn has a direct impact on exploration and development activities reservoirs.Keywords: seismic velocities, elastic properties, sedimentary rocks.RESUMO. O objetivo deste trabalho é estudar o comportamento elástico de diferentes tipos de rochas sedimentares provenientes de afloramentos da região Centro-Oeste dos Estados Unidos da América, entres estas, o arenito Berea da formação Bedford (Ohio), o calcário Indiana da formação Salem (Indiana) e o dolomito Silurian da formação Thornton (Illinois). Para tanto, foram realizadas, no Laboratório de Física de Rochas do Cenpes (Centro de Pesquisas e Desenvolvimento da Petrobras), medidas de porosidade, densidade e de velocidades de propagação das ondas elásticas apresentadas por tipo de rocha estudada. As velocidades de propagação das ondas foram determinadas medindo-se o tempo de trânsito de um pulso ultrassônico de alta frequência transmitido através das amostras. A partir dos resultados obtidos, foi possível comparar as velocidades medidas com as previsões feitas a partir de modelos teóricos, assim como foi possível observar correlações existentes entre as propriedades petrofísicas das rochas e o seu comportamento sísmico. O entendimento dessas correlações contribui para a melhoria da interpretação de medidas geofísicas e para o aprimoramento do método sísmico, que por sua vez, tem impacto direto nas atividades de exploração e desenvolvimento de reservatórios.Palavras-chave: velocidades sísmicas, propriedades elásticas, rochas sedimentares.
Resumos de Teses e Dissertações
Authors: SBGf Sociedade Brasileira de Geofísica
Published: March 2017

Resumos de Teses e Dissertações
ELECTRICAL RESISTIVITY METHOD APPLIED TO STUDY GROUNDWATER CONTAMINATION AROUND THE ALAGOINHAS CEMETERY, BAHIA, BRAZIL
Authors: Amarante Eduardo M.S. , Lima Olivar A.L. de , Cavalcanti Susana S.
Published: March 2017

ABSTRACT. To investigate the subsurface geological and hydrological conditions around the area of the Alagoinhas county cemetery – Bahia State, Brazil, 38 vertical electrical soundings using Schlumberger electrode array were performed to a maximum AB/2 spacing... RESUMO. Para investigar as condições geológicas e hidrológicas da subsuperfície na área do entorno do Cemitério Municipal de Alagoinhas, Bahia, foram realizadas 38 sondagens elétricas verticais centradas em pontos acessíveis da área. As sondagens foram...
ESTIMATES OF SOIL WATER CONTENT USING GROUND-PENETRATING RADAR IN FIELD CONDITIONS
Authors: Mesquita Marcelo Jorge Luz , Luiz José Gouvêa , Costa José de Paulo Rocha da
Published: March 2017

ABSTRACT. Electromagnetic methods play an important role in the study of soil water content, mainly because electromagnetic properties in the shallow subsurface area are primarily controlled by the presence of... RESUMO. Os métodos eletromagnéticos são uma importante ferramenta no estudo da umidade do solo, principalmente porque as propriedades eletromagnéticas da subsuperfície rasa são...
SEASONAL AND INTERANNUAL PATTERN OF METEOROLOGICAL VARIABLES IN CUIABÁ, MATO GROSSO STATE, BRAZIL
Authors: Machado Nadja Gomes , Biudes Marcelo Sacardi , Querino Carlos Alexandre Santos , Danelichen Victor Hugo De Morais , Velasque Maísa Caldas Souza
Published: March 2017

ABSTRACT. Cuiabá is located on the border of the Pantanal and Cerrado, in Mato Grosso State, which is recognized as one of the biggest agricultural producers of Brazil. The use... RESUMO. Cuiabá está localizado na fronteira do Pantanal e Cerrado, no Mato Grosso, que é reconhecido como um dos maiores produtores agrícolas do Brasil. A utilização dos...
SHALLOW WATERS INTERFERENCE PATTERN FEATURES AND APPLICATIONS
Authors: Chaves Antonio Hugo Saroldi , Pessek Kleber , Guimarães Luiz Gallisa , Parente Carlos Eduardo
Published: March 2017

ABSTRACT. Studies in shallow waters pointed out that the acoustic wave interference patterns have potential application in a broad range of problems in underwater acoustics... RESUMO. Estudos em águas rasas apontam que os padrões de interferência de ondas acústicas têm aplicação potencial em uma ampla gama de problemas de acústica...
TECTONOSTRATIGRAPHIC CHARACTERIZATION OF THE ADJACENT PORTION TO THE SÃO VINCENTE EARTHQUAKE EPICENTER IN THE SANTOS BASIN
Authors: Schweig Camila , Dourado João Carlos , De Souza Anderson
Published: March 2017

ABSTRACT. The São Vicente earthquake, which had occurred in the Santos Basin, approximately 200 km from São Vicente city, São Paulo state in 2008, was well detected in the global network...RESUMO. O sismo São Vicente, que ocorreu na Bacia de Santos, há aproximadamente 200 km da cidade de São Vicente (SP) em 2008, foi bem detectado na rede mundial...
RELATIONSHIP BETWEEN INSTABILITY INDICES AND EXTREME RAINFALL IN THE STATE OF RIO GRANDE DO SUL, BRAZIL
Authors: Schumacher Vanúcia , Teixeira Mateus Da Silva
Published: March 2017

ABSTRACT. The relationship between stability indices and extreme daily rainfall over state of Rio Grande do Sul, Brazil, is studied, as well as the main differences between extreme and ordinary rainfall events. A total...Keywords: rainfall forecasting, atmospheric instability, composites, correlation. RESUMO. A relação entre os índices de instabilidade e a chuva extrema sobre o estado do Rio Grande do Sul, Brasil, é estudada neste trabalho, bem como as principais diferenças entre eventos comuns e extremos de chuva diária...Palavras-chave: previsão de chuva, instabilidade atmosférica, compostos, correlação.
SUBSURFACE STRESS PREDICTION USING SEISMIC DATA FOR OIL AND GAS EXPLORATION
Authors: Leite Lourenildo W.B. , Vieira Wildney W.S. , Sibiryakov Boris
Published: March 2017

ABSTRACT. The present paper is part of a major research study that has for objective the prediction of stress in sedimentary basins, as a contribution to geological and engineering methods and techniques for oil and gas exploration. Such an attractive and important scientific theme is based on the knowledge of the compressional...Keywords: sedimentary basin modeling, pressure prediction, subsurface stress. RESUMO. O presente trabalho faz parte de um projeto de estudomaior que tem por objetivo a predição de tensões embacias sedimentares, como uma contribuição aos métodos e técnicas da geologia e da engenharia de exploração de óleo e gás. Este assunto científico, atrativo e importante, é baseado...Palavras-chave: modelagem de bacia sedimentar, predição de pressão, tensão na subsuperfície.
GULLY CAVITY IDENTIFICATION THROUGH ELECTRICAL RESISTIVITY TOMOGRAPHY
Authors: Carrazza Leonardo Paioli , Moreira Cesar Augusto , Helene Lívia Portes Innocenti
Published: March 2017

ABSTRACT. Chaotic urban expansion often leads to hazardous environmental consequences. The absense of rainwater outflow management, coupled with low cohesion in some terrains is a geotechnical threat for the population since it may lead to gully formation...Keywords: piping, geophysics, electrical resistivity, electrical resistivity tomography. RESUMO. A expansão urbana desordenada pode gerar graves consequências ao ambiente. A falta de planejamento no escoamento de águas pluviais, aliado à baixa coesão de alguns terrenos pode proporcionar o surgimento de voçorocas,Palavras-chave: piping, geofísica, resistividade elétrica, tomografia elétrica.
NOISE ATTENUATION IN SEISMIC REFLECTION DATA COMBINING EMPIRICAL MODE DECOMPOSITION AND SVD FILTERING
Authors: Alves Felipe Da Mota , Porsani Milton J.
Published: March 2017

ABSTRACT. Noises are common events in seismic reflection that have very striking features in the seismograms, hindering the data processing and interpretation. The attenuation of seismic noise is a challenge, in general frequency filters are employed, but they often do not show good results. The characteristic of noise...Keywords: seismic noise, Empirical Mode Decomposition, Singular Value Decomposition. RESUMO. Ruídos são eventos comuns na sísmica de reflexão que possuem características bem marcantes nos sismogramas, atrapalhando o processamento e interpretação dos dados. A atenuação de ruídos sísmicos é um desafio, em geral são utilizados filtros de...Palavras-chave: ruídos sísmicos, Decomposição em Modos Empíricos, Decomposição em Valores Singulares.
RESULTS OF INCORPORATING THE STRATIGRAPHY WITHIN THE EVAPORITIC SEQUENCE INTO THE VELOCITY FIELD FOR RESERVOIR CHARACTERIZATION
Authors: Falcão Livia , Maul Alexandre , Gobatto Fernanda , González Gerardo , González María De Los Ángeles
Published: March 2017

ABSTRACT. There are many ways to build velocity models for seismic migration purposes, either by using inversion algorithms, approximations by constant or variables velocities, including or not including anisotropic parameters, etc...Keywords: amplitude responses, attributes, salt, pre-salt, uncertainties. RESUMO. Atualmente existem muitas alternativas para construção de modelos de velocidades para propósitos de migração sísmica, seja usando algoritmos de inversão ou aproximações por estimativas de velocidades constantes e/ou variáveis, inserindo ou não parâmetros de anisotropia, etc.Palavras-chave: respostas de amplitude, atributos, sal, pré-sal, incertezas.
Internal and External Factors of Future Returns in the Banking Business: Time Series Analysis of Interrelationship
Authors: Kyei Kwabena A , Antwi Albert
Published: March 2017

The paper seeks to find the interrelationship between internal and external factors of future returns in the banking business. A multivariate time series regression models are fitted for the dependent variable: return on equity (ROE) against the lag one independent variables, namely: deposit, size, loan, capital, inflation, gross domestic product (GDP) and stock market capitalization (SMC), for ABSA bank; using secondary data, which span from 1998 to 2014 fiscal years. Logarithm transformation of the absolute value of the de-trended data and first differencing at lag one were the smoothing techniques applied to the data. Multivariate time series regression by the least square approach with special consideration of the stepwise method was used in fitting the models to the data. Results indicated that first, there is a positive linear relationship between ROE and loans, a negative linear relationship between ROE and inflation from the differencing techniques; and equally a negative log-linear relationship between ROE and capital as well as a positive log-linear relationship between ROE and ROA for the logarithm de-trend technique.
Project progress measurement under the circumstance of interrupted schedule
Authors: Guo Yun-Tao , Yang Shao-Ting , Wang Lin , Luo Shu-Juan
Published: March 2017

Earned Value Method (EVM) is a project management technique for measuring
both project progress and performance in project activities. Unfortunately,
this method could not provide credible data in project progress measurement
these days due to its deficiency. Thus, a new method called Earned Schedule
(ES) is designed to cover EVMs limitation. Considering the fact that
researches on ES are focus on simply project under certainty, this paper is
to fill in the blank of uncertainty. In this paper, a new concept called
interrupted Earned Schedule (iES) and its indicators are presented
considering the situation of interrupted schedule when doing project
progress measurement. This concept can offer accurate description about
schedule interrupted project of its progress measurement. With the help of a
model project, iES and its indicators are proven practicable. Moreover, a
comparison between iES and ES of a schedule interrupted project shows
priority of the former one.
The impact of bus priority policies on peak commuters behavior: An agent-based modelling perspective
Authors: Ling Shuai , Hu Wandi , Zhang Yongjie
Published: March 2017

By using micro-simulation method and the BushCMosteller reinforcement
learning model, this paper modeled the behavior of urban commuters departure
time choice on a many-to-one transit system during the morning peak-period.
Three kinds of typical urban public transport priority policies were
studied. Result shows that if we can choose the right time for free public
transportation, the pre-peak-free policy will have certain effects on
staggering the commuting peak by influencing commuters decision making on
departure-time. As for the bus-accelerating policy, it can lower commuters
cost, but it is likely to cause more congested volume and add more pressure
on the public transit system. The departure frequency increasing policy can
partially alleviate the peak congestion problem, but cannot fundamentally
eliminate the congestion, instead, it may increase the operating costs. This
research is helpful in acquiring a better understanding of commuters
departure time choice and commuting equilibrium during the peak period. The
research approaches also provide an effective way to explore the formation
and evolution of complicated traffic phenomena.
Hybridizing support vector machines into genetic algorithm for key factor exploration in core competence evaluation of aviation manufacturing enterprises
Authors: Zhai Linwei , Qin Jian , Yu Lean
Published: March 2017

In the core competence comprehensive evaluation of aviation manufacturing
enterprises, exploring the key factors affecting core competence is crucial
to improve the competitiveness of the aviation manufacturing enterprises. In
this paper, a novel hybrid approach integrating genetic algorithm (GA) and
support vector machines (SVM) is proposed to conduct the key factor
exploration tasks in the core competitiveness evaluation of aviation
manufacturing enterprises. In the proposed hybrid GA-SVM approach, the GA is
used for key factor exploration, while SVM is used to calculate the fitness
function of the GA method. Using the survey data from Aviation Industry
Corporation of China (AVIC), some experiments analysis is conducted to test
the effectiveness of the proposed hybrid approach. Empirical results
demonstrate that the proposed hybrid GA-SVM approach can be used as an
alternative solution to key factor exploration.
A research on internal control, cash dividends and enterprise performance based on economic consequences
Authors: Wang Yilin , Ruan Lei
Published: March 2017

Whether internal control and cash dividend will have an interactive
synergetic effect on enterprise performance or not is a study of both
theoretical value and practical significance. Consequently, this article
adopts a two-stage investment decision research process, explains the complex
theoretical relationship among internal control, cash dividend and enterprise
performance and, taking the Chinese A-share motherboard as an example,
further explores their interactive synergetic effect. The research concludes
that: (1) Internal control and cash dividend can contribute to the
improvement of both short-term and longterm enterprise performance; (2)
Internal control and cash dividend do have a significant synergetic effect,
however there is a large disparity between the synergetic effect on
short-term and long-term enterprise performance. In addition, the study finds
that internal control and cash dividends are mutually regulative, thereby
diminishing the positive impact on short-term enterprise performance and
conversely enhancing the positive impact on long-term enterprise performance
respectively.
Endothelial HIF-1α Enables Hypothalamic Glucose Uptake to Drive POMC Neurons
Authors: Varela Luis , Suyama Shigetomo , Huang Yan , Shanabrough Marya , Tschöp Matthias H. , Gao Xiao-Bing , Giordano Frank J. , Horvath Tamas L.
Published: March 2017

Glucose is the primary driver of hypothalamic proopiomelanocortin (POMC) neurons. We show that endothelial hypoxia-inducible factor 1α (HIF-1α) controls glucose uptake in the hypothalamus and that it is upregulated in conditions of undernourishment, during which POMC neuronal activity is decreased. Endothelium-specific knockdown of HIF-1α impairs the ability of POMC neurons to adapt to the changing metabolic environment in vivo, resulting in overeating after food deprivation in mice. The impaired functioning of POMC neurons was reversed ex vivo or by parenchymal glucose administration. These observations indicate an active role for endothelial cells in the central control of metabolism and suggest that central vascular impairments may cause metabolic disorders.
Brian, Ellis, 2009. The Metaphysics of Scientific Realism. Durham: Acumen Publishing Co. 165 pp.
Authors: Reyes Cárdenas Paniel Osberto
Published: March 2017

Reseña del libro de Ellis Brian "The Metaphysics of Scientific Realism". 2009. Durham: Acumen Publishing Co. 165 pp.
Investigation of Functional Carboxy-Containing Oligomers by IR and NMR Spectroscopy
Authors:   Lviv Polytechnic National University, 12 S. Bandera St., 79013 Lviv, Ukraine, Bashta Bogdana , Donchak Volodymyr ,   Lviv Polytechnic National University, 12 S. Bandera St., 79013 Lviv, Ukraine, Plonska-Brzezinskа Marta ,   University of Bialystok, 1 Hurtowa St., 15-399 Bialystok, Poland, Astakhova Olena ,   Lviv Polytechnic National University, 12 S. Bandera St., 79013 Lviv, Ukraine, Bratychak Michael ,   Lviv Polytechnic National University, 12 S. Bandera St., 79013 Lviv, Ukraine
Published: March 2017

New functional oligomers have been synthesized via intereaction of epoxy oligomers with carboxylic ones or with dibasic carboxy acids. In some cases synthesis was accompanied by ROP-polymerization of DGEBA, initiated by carboxylic oligomer. The structure of obtained products was investigated by IR, 1Н and 13C NMR spectroscopy.
Comparative Dynamic Characteristics of Electrospun Ultrathin Fibers and Films Based on Poly(3-hydroxybutyrate)
Authors:   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation, Staroverova Olga , Karpova Svetlana ,   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation, Iordanskii Alexey ,   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation, Olkhov Anatoliy ,   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation,   G. Plekhanov Russian University of Economics, 9 Stremyannoy Ln., 117997 Moscow, Russian Federation, Khvatov Anatoliy ,   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation, Grumezescu Alexandru Mihai ,   University Politehnica of Bucharest, 1-7 Polizu str., 011061 Bucharest, Romania, Kildeeva Natalia ,   Moscow State Institute of Design and Technology, 1 Malaya Kaluzhskaya St., 119071 Moscow, Russian Federation, Artsis Marina ,   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation, Zaikov Gennady ,   General Institute of Chemical Physics of Russian Academy of Sciences, 4 Kosygin St., 119991 Moscow, Russian Federation
Published: March 2017

The dynamic of polymer chains for electrospun poly(3-hydroxybutyrate) (PHB) fibers and the PHB films was studied with spin probe characteristics obtained by ESR technique. The ESR data combined with DSC analysis reveal the presence of two TEMPO probe populations with different correlation times indicating the heterogeneous structure of intercrystalline areas in the films, fibers and the cold rolled fiber mats. The ESR data are in agreement with the 2-mode model of amorphous state in semicrystalline polymers. The difference in peak intensities shows that effective correlation time in the electrospun fibers exceeds the same characteristic in the film, that also indicates the slower molecular mobility in the low-dense amorphous fraction of PHB fibers as compared to the film. The impact of potential aggressive factors such as water, temperature and ozone upon probe mobility allows suggesting that both the fiber electrospinning and the cold-rolling procedure lead to rearrangement in the intercrystalline fields of PHB that contribute to the progress in the fiber stabilization against the aggressive factors.
Interfacial and Wetting Behavior of Cationic, Anionic and Nonionic Surfactants in the Absence and Presence of Lysozyme
Authors:   Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (Central University), New Delhi-110025, India, Patel Rajan , Dohare Neeraj ,   Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (Central University), New Delhi-110025, India, Khan Abbul Bashar ,   Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (Central University), New Delhi-110025, India
Published: March 2017

Herein, we discuss various physicochemical properties of cationic (CTAB), anionic (SDBS) and nonionic (TX-100) surfactants in the presence and absence of lysozyme, at different temperatures by using tensiometery. The surface excess (Γmax) decreases with the increase in temperature for all three kinds of surfactants in the presence and absence of lysozyme, but the most prominent decrease is to be observed for SDBS as compared to CTAB and TX-100 in the presence of lysozyme. The minimum area per molecule (Amin) follows the opposite trend as expected. In addition, contact angle analysis was also done to observe the wettability of poly(methyl methacrylate) (PMMA) surface by these surfactants in the presence and absence of lysozyme.
Mineral Filled Porous Composites Based on Polyvinylpyrrolidone Copolymers with Bactericidal Properties
Authors:   Mineral Filled Porous Composites Based on Polyvinylpyrrolidone Copolymers with Bactericidal Properties, Skorokhoda Volodymyr , Semenyuk Nataliya ,   Mineral Filled Porous Composites Based on Polyvinylpyrrolidone Copolymers with Bactericidal Properties, Dziaman Iryna ,   Mineral Filled Porous Composites Based on Polyvinylpyrrolidone Copolymers with Bactericidal Properties, Suberlyak Oleg
Published: March 2017

The polymerization of 2-hydroxyethylmethacrylate compositions with polyvinylpyrrolidone has been investigated in the presence of mineral fillers (hydroxyapatite, montmorillonite and wollastonite). The influence of the nature and amount of mineral filler on polymerization kinetics and composition of copolymers has been determined. In the composite structure silver particles were obtained via silver nitrate reduction by polyvinylpyrrolidone tertiary nitrogen. The synthesized silver-containing composites possess bactericidal properties against E. colі and S. aureus bacteria, in particular.
Waste Gases Cleaning at the Production of Ferrum Oxide Pigment Using Horizontal Apparatus with Bucket-like Dispersers
Authors:   Lviv Polytechnic National University 12, St. Bandera str., 79013 Lviv, Ukraine, Yavorskiy Victor , Helesh Andriy ,   Lviv Polytechnic National University 12, St. Bandera str., 79013 Lviv, Ukraine
Published: March 2017

The efficiency of horizontal apparatus with bucket-like dispersers (HABD) for waste gases cleaning from Fe2O3 dust at the production of red ferrum oxide pigment has been proved by the experiments. It is advisable to carry out the dust trapping in HABD under countercurrent mode. Such mode allows to condense steam from the gas phase and trap small particles of the dust. The positive effect of surface active substances on the dust trapping has been shown. Technologically feasible concentrations of polyacrylamide have been determined. The obtained results may be used for the development of waste gases cleaning technology at the production of ferrum oxide pigment.
Obtaining of Brown Pigments from Concentrated Waste Water Containing Nickel
Authors:   Ukrainian State Chemical Technology University 8, Gagarina Ave., 49005 Dnipropetrovsk, Ukraine, Frolova Liliya , Pivovarov Alexander ,   Ukrainian State Chemical Technology University 8, Gagarina Ave., 49005 Dnipropetrovsk, Ukraine
Published: March 2017

The possibility of obtaining brown pigments with the use of blast furnace slag from waste water containing nickel is justified. The scheme of the main reactions is proposed. The kinetics of the reactions is studied. The contribution of the chemical interaction into the overall degree of treatment is established by potentiometric titration. The influence of the main factors on the degree of nickel extraction is determined. The phase composition of the formed pigment is established with the help of X-ray analysis. Rheological properties of the pigment particles are set. The main color characteristics of the obtained products are identified by visual and spectrophotometric way. X-ray microanalysis indicated the presence of the two phases in the obtained precipitate. Dispersed and phase compositions of the original slag determine the rheological properties of the pigment. By varying the synthesis parameters, the obtained patterns provide us with possibility of receiving pigments of the color from light brown to deep brown.
Advancement in Applicability of Carbon Nanotubes in Progressive Fuel Cells
Authors:   BITS Pilani, Dubai Campus, Dubai International Academic City, P.O. Box: 345055, Dubai, UAE, Sarkar Snatika , Ilango Vijaya ,   BITS Pilani, Dubai Campus, Dubai International Academic City, P.O. Box: 345055, Dubai, UAE
Published: March 2017

Energy conservation is an important issue in a world that is still largely dependent on non-renewable energy resources. Despite the growing awareness about the advantages of renewable resources, fossil fuels in the form of coal and petroleum dominate the energy consumption scenario. The primary reason for this situation is the greater commercial viability of fossil fuels. Fuel cells are an important, environment friendly means of utilizing the energy stored in hydrogen. It is however, essential to strive towards making them more economical for commercial use. This paper focuses on proton exchange membrane fuel cells (PEMFC) and usage of carbon nanotubes for increased efficiency. The paper also discusses a possible material that may find potential application in the fuel cell as an alternative to the carbon nanotubes existing so far.
KINERJA GURU SEJARAH SMA DI KOTA METRO
Authors: Kuswono Kuswono
Published: March 2017

The aim of this study was to describe the performance of high school history teacher in Metro City. Assess teacher performance in the history of the city's Metro As infromasi for measures of performance development in the history teachers to meet curriculum of 2013. This type of research is quantitative descriptive using the survey method. This study will assess the performance of teachers and the entire population of high school history teacher in Metro City. The sampling technique using disproportionate stratified random sampling, data collection techniques using a questionnaire using Likert scale. The maximum score 7 so that teacher performance can be compared with scores obtained from each school that SMA 1 Metro get the value of 6.59. SMAN 2 Metro get a score of 6, 17. SMAN 3 Metro has a score of 4.03. SMAN 4 get a score of 5.33. SMAN 5 get a score of 6.61 and SMAN 6 get a score of 5.91. Performance history teacher high schools in Metro City is at a good level.
PENGARUH DISIPLIN BELAJAR DAN KINERJA TUGAS RUMAH TERHADAP HASIL BELAJAR FISIKA SISWA KELAS VIII SMP MUHAMMADIYAH 1 PEKALONGAN TAHUN PELAJARAN 2012/2013
Authors: Utama Galih Ricky , Salim M. Barkah
Published: March 2017

Discipline is one thing that is important in achieving the maximum target in the learning process . Besides the performance of the task is an effort to instill a deeper concept in a subject matter . With the homework expected of students actively learn and be stimulated to enhance better learning , fostering initiative and are solely responsible bold . Sengganggnya so students use the time for things that support their learning by completing activities that are useful and constructive With discipline and performance of the duties expected student achievement in the field of study of physics can be optimal.                          The purpose of this study was to determine the effect of the discipline of learning and the performance of the duties of the learning outcomes of physics . This type of research is experimental . Collecting data using questionnaires and tests . The research was conducted at SMP Muhammadiyah 1 Pekalongan , randomly selected sample . The data analysis technique used is the calculation of the linear regression analysis . The results showed that the discipline of learning and administration tasks affect student learning outcomes , it is obtained from the results of hypothesis testing on the discipline of learning on learning outcomes in Fhit = 20.32 greater than t table at significance level α = 5 % Fdaf = 4 , 10 . While testing the hypothesis on the performance of the duties of the student learning outcomes obtained with Fdaf value = 48.67 greater than the significance level α = 5 % tdaf = 4.10 . After the authors conducted a study proved that the suspect had a significant influence between disciplines home learning and task performance on learning outcomes , the authors suggest to students to be more disciplined in learning activities , so that the learning outcomes that will be obtained will be better and in accordance with the expected . For teachers to further streamline the tasks given to the students , not just the task of completing a matter of course , but the task of creating a summary and demonstrate concepts learned in class.
Using Battery-Less RFID Tags with Augmented Capabilities in the Internet of Things
Authors: Colella Riccardo , Esposito Alessandra , Catarinucci Luca , Tarricone Luciano
Published: March 2017

Driven by user demand for new smart systems in the framework of the Internet of Things (IoT) and fueled by technological advances in Radiofrequency Identification (RFID), an increasing number of new IoT-oriented RFID-based devices has appeared in recent years in scientific literature. Some of them conjugate canonical RFID identification with extra functionalities such as sensing, reasoning, memorization, and actuation. In this way, IoT challenging applications can be developed, which distribute processing load till to the extreme nodes of the network, while lying upon the well-established RFID infrastructure. In this work, a reasoned panoramic on the potentialities in the IoT framework of augmented RFID tags is presented and classified. Two applicative scenarios are envisioned, presented and discussed, to illustrate how augmented RFID devices may support advanced IoT systems.
Visualization Tool for Control Signalling in NG-PON2
Authors: Jurcik Michal , Horvath Tomas
Published: March 2017

The requirements of end users on the quality of Internet connection and services is forcing the Internet providersand technical community to propose and introduce new technologies which may react to this demand. The most promising solution in this regard seems to be a passive optical network. There are many standards and recommendations provided by the organizations IEEE and ITU-T, such as EPON, GEPON, G-PON, XG-PON, and newly added NG-PON2 described in the ITU-T G.989 recommendation. Due to the implementation of TWDM mechanism the recommendation describes additionalcontrol messages to manage the whole network. This leads us to a need for a visualization tool which clearly shows control message flows and events between ONU and OLT units for each state. The application, designed by the authors and developed in C# programming language, is mainly focused on education purposes, but could be also useful to skilled industry professionals and in general those who have read the standard but are not fully familiar with the sequence of data flow in NG-PON2.
Género, sexualidad y transición subjetiva en México: construcción de la adolescencia femenina en las celebraciones de 15 años
Authors: Gutiérrez Domínguez Lisett María
Published: March 2017

En el presente artículo se discute el tema de la articulación entre el género, la edad y la clase social en los procesos de construcción subjetiva que ocurren durante el tránsito de la infancia a la adolescencia. A partir de la relación entre los conceptos de posiciones de sujeto, interpelación, performatividad y cita, se analiza cómo esta transición para las adolescentes mexicanas es asociada con la celebración de los 15 años, a pesar de que muchas familias rechazan el patrón de fiesta típica y las normas de género vinculadas a ese patrón. Como material empírico para la discusión, se presentan dos casos de quinceañeras que, aunque no hacen una fiesta típica, tanto ellas como sus familiares se sienten interpeladas por la llegada de los 15 años, reconocen la existencia de una tradición asociada a este momento de la vida, manifiestan algún tipo de rechazo a dicha tradición, debaten acerca de formas alternativas de celebrar, y facilitan procesos de transición subjetiva hacia la feminidad adolescente, o bien, se resisten a ellos, postergándolos.
Planificar la exclusión de los hombres de la planificación familiar: un estudio de caso en México
Authors: Gutmann Matthew
Published: March 2017

No hay ningún lugar en el mundo donde participen más hombres que mujeres en la anticoncepción. A medida que se ha ampliado en el ámbito internacional la disponibilidad de métodos anticonceptivos altamente efectivos para mujeres, y que en las últimas décadas las mujeres se han convertido en el objetivo crucial de las campañas de planificación familiar, las decisiones sobre el control de la natalidad ocurren cada vez más en una cultura anticonceptiva femenina. Se ha marginado involuntariamente a los hombres de la responsabilidad para prevenir el embarazo y en ello han estado involucradas la industria farmacéutica trasnacional, los organismos nacionales de planificación familiar, las instituciones religiosas y los organismos y fundaciones de ayuda multilateral. En Oaxaca, la baja tasa de participación masculina en la anticoncepción está determinada por las estructuras e ideologías globales articuladas en la premisa, legitimada por tópicos biológicos inadecuados, de que la sexualidad masculina y la femenina son dicotómicas.
Las niñas buenas no gritan: anorexia y desafíos a la feminidad en jóvenes mujeres de León, Guanajuato
Authors: Hernández Gutiérrez Julia
Published: March 2017

Desde un cruce entre los estudios de juventud y género, se sugiere una interpretación de la anorexia nerviosa relacionada particularmente con la vida y experiencias de las mujeres jóvenes que sufren de este trastorno de la alimentación, teniendo en cuenta su edad, así como las demandas de género que experimentan. Se cuestiona que las jóvenes con anorexia se ajusten dócil y silenciosamente ?como es "propio de su género"? a los requerimientos sociales y de su entorno inmediato, relacionados con el apego a cierto ideal estético y al mantenimiento de una actitud propia de una "señorita". En este artículo se propone, por el contrario, que la anorexia puede implicar formas de resistir a las exigencias del entorno, lo que muestra la ironía de las fachadas y la rabia que puede haber en un cuerpo, parentemente, delicado. El presente trabajo se funda en una investigación realizada en León, Guanajuato.
Cambios y permanencias en las experiencias sexuales de tres generaciones de mujeres indígenas originarias de los Altos de Chiapas
Authors: Velasco Domínguez Lourdes
Published: March 2017

La presente nota de investigación expone los principales planteamientos y hallazgos de la tesis de maestría en Estudios de Género titulada “Sexualidades entre las normas comunitarias y la individualización: experiencias sexuales de mujeres indígenas de tres generaciones originarias de los Altos de Chiapas” (Velasco, 2014).En esta investigación se exploran las condicionantes sociales y formas de agenciainvolucradas en las experiencias sexuales de nueve mujeres indígenas, para conocer sus cambios y permanencias a lo largo de tres generaciones
A difusão do você pelas estruturas sociais carioca e mineira dos séculos XIX e XX
Authors: Lopes Célia Regina dos Santos , Rumeu Márcia Cristina de Brito
Published: March 2017

Neste trabalho, busca-se discutir a produtividade das estratégias pronominais de referência ao sujeito de 2a pessoa do discurso e os tipos de relações sociais travadas entre remetente e destinatário em missivas cariocas e mineiras oitocentistas e novecentistas. O foco deste estudo são os tipos de relações sociais que parecem condicionar a frequência de uso das estratégias pronominais de 2a pessoa no Brasil à luz da Teoria do Poder e da Solidariedade pensada por Brown e Gilman (1960). De uma forma geral, nas missivas cariocas e mineiras caracterizadas pelas relações sociais simétricas e assimétricas, observou-se a difusão do você, parecendo já sedimentar a semântica da Solidariedade no Brasil novecentista. 
El SENA: Un legado de Rodolfo Martínez Tono
Authors: Nieva Chaves José Antonio
Published: March 2017

En este artículo se reflexiona sobre el quehacer del SENA a partir de los aportes de Rodolfo Martínez Tono; destacando el papel decisivo de la entidad como una de las instituciones con mayor pre- sencia en todo el país, aún en los lugares más recónditos, y su lugar como ejemplo de Formación para el trabajo y desarrollo humano en América Latina. Para ello, se piensa su quehacer y su impacto en la sociedad colombiana, desde principios que asumen los procesos educativos desde una perspectiva integral, en la que subyace una concepción antropológica y de cosmovisión que no se reduce a lo metodológico o a la producción.