bluuebunny/crossref_metadata_2025 huggingface dataset:
Subsidized Housing and Adult Asthma in Boston, 2010–2015
Authors: Mehta Amar J. , Dooley Daniel P. , Kane John , Reid Margaret , Shah Snehal N.
Published: June 2018

Objectives. To examine whether subsidized housing, specifically public housing and rental assistance, is associated with asthma in the Boston, Massachusetts, adult population.

Methods. We analyzed a pooled cross-sectional sample of 9554 adults taking part in 3 Boston Behavioral Risk Factor Surveillance System surveys from 2010 to 2015. We estimated odds ratios for current asthma in association with housing status (public housing development [PHD] resident, rental assistance [RA] renter, non-RA renter, nonrenter nonowner, homeowner as reference) in logistic regression analyses adjusting for year, age, sex, race/ethnicity, education, and income.

Results. The odds of current asthma were 2.02 (95% confidence interval [CI] = 1.35, 3.03) and 2.34 (95% CI = 1.60, 3.44) times higher among PHD residents and RA renters, respectively, than among homeowners. We observed smoking-related effect modification (interaction P = .04); elevated associations for PHD residents and RA renters remained statistically significant (P < .05) only among ever smokers. Associations for PHD residents and RA renters remained consistent in magnitude in comparison with non-RA renters who were eligible for subsidized housing according to income.

Conclusions. Public housing and rental assistance were strongly associated with asthma in this large cross-sectional sample of adult Boston residents.
Nonsuicidal Self-Injury Among a Representative Sample of US Adolescents, 2015
Authors: Monto Martin A. , McRee Nick , Deryck Frank S.
Published: June 2018

Objectives. To provide prevalence estimates of adolescent nonsuicidal self-injury (NSSI) based on large, representative, nonclinical samples of high-school students, and to explore gender differences in health risks associated with NSSI.

Methods. We used 2015 Centers for Disease Control and Prevention Youth Risk Behavior Surveillance System data to estimate the prevalence of self-injury and variables potentially associated with self-injury for high-school–age boys (n = 32 150) and girls (n = 32 521) in 11 US states. We used logistic regression analysis to consider associations between NSSI and other health risks.

Results. Rates of boys reporting purposefully hurting themselves without wanting to die over the past 12 months ranged from 6.4% (Delaware) to 14.8% (Nevada). Rates for girls varied from 17.7% (Delaware) to 30.8% (Idaho). Rates declined with age and varied by race and ethnicity. Depression; suicidal thoughts, plans, and attempts; sexual minority status; being electronically bullied; smoking; and substance use were associated with NSSI. There were minor differences in associations between NSSI and health risk variables by gender.

Conclusions. Nonclinical populations of adolescents are at high risk for self-injury. Nonsuicidal self-injury was higher among girls than among boys, but patterns of association with other health risks were similar.
Multiporosity/Multipermeability Inclined-Wellbore Solutions With Mudcake Effects
Authors: Liu Chao , Abousleiman Younane N.
Published: June 2018

This paper investigates the effects of mudcake and formation multiporosity/multipermeability on the evolution of a safe-drilling mudweight window. The analytical poroelastic solutions for an inclined wellbore drilled through a multiporosity/multipermeability porous medium were derived, taking into account the mudcake buildup on the wellbore wall. A multiporosity/multipermeability porous medium consists of an overlapping of N distinct porous-continuum networks, each of which has its own geomechanical and petrophysical properties. Wellbore collapse and fracturing are investigated by studying a dual-porosity naturally fractured weak sandstone. The first porosity is matrix porosity, and the second porosity is the fractures. In addition, a triple-porosity source shale with multiple scales of natural fractures was modeled. The first porosity corresponds to the shale matrix one, and two scales of fracture distribution account for the other two sets of porosity.

The Drucker and Prager (1952) criterion is applied to analyze wellbore collapse and shear failure, whereas the tensile strengths of both formations are considered, conservatively, as negligible. The safe-drilling mud-weight window is calculated to illustrate the time-dependent effects of formation N-porosity/N-permeability nature and the wellbore-wall boundary conditions (with/without mudcake). On the one hand, natural fractures narrow the safe-drilling mud-weight window by degrading rock strength and facilitating hydraulic-pressure invasion. On the other hand, the mudcake leads to a wider safe-drilling mud-weight window by generating compressive effective radial stress on the wellbore wall and impeding hydraulic-pressure invasion. Mudcake thickness and mudcake permeability are found to have significant effects. The drilling-mud design to build a mudcake on the wellbore wall is essential when drilling through difficult naturally fractured formations.
Sheathed Panicle Phenotype (cv. Sathi) Maintains Normal Spikelet Fertility and Grain Filling under Prolonged Heat Stress in Rice
Authors: Lawas Lovely M. F. , Bheemanahalli Raju , Solis Celymar A. , Jagadish S. V. Krishna
Published: June 2018

The failure of panicle exertion or sheathed panicle (SP) phenotype in rice (Oryza sativa L.) has been associated with spikelet sterility and grain yield loss under both stress and nonstress conditions. A unique SP phenotype (cv. Sathi) having the potential to maintain normal seed‐set and grain weight (exposed to 38°C for 20 d) was identified. Despite the higher spikelet tissue temperatures (38–40°C) at anthesis, pollen count and germinated pollen grains on the stigma were greater in number than the threshold required for successful seed‐set. Panicle length, total spikelet number, and grain thickness in SP phenotype were not affected significantly by heat stress. In addition, lower lipid peroxidation in spikelets and nonsignificant reduction in carbohydrate metabolism enzymes (invertases and starch synthase) were recorded during grain filling, even after 10 d of heat stress exposure. Minimal impact on carbohydrate metabolism enzymes would support normal sucrose unloading and starch synthesis in the grain and normal grain size under prolonged heat stress exposure. Our findings open novel avenues for genetic and molecular dissection for inducing greater heat stress resilience during anthesis and grain filling in sensitive, popular rice cultivars to sustain global food security under future uncertain environmental conditions.
Abiotic Stress Effects on Sorghum Leaf Dhurrin and Soluble Sugar Contents throughout Plant Development
Authors: Emendack Yves , Burke John , Laza Haydee , Sanchez Jake , Hayes Chad
Published: June 2018

Although cyanogenic glucosides are considered to play important roles in plant growth, development, and resistance against abiotic and biotic stresses, their presence in high concentrations in feed and food can be fatal to animals and humans. Sorghum [Sorghum bicolor (L.) Moench] is cyanogenic, and the cyanide potential varies with environmental factors, management, and genetic background. Acyanogenic lines have not been identified to date in natural collections. Although the variability of cyanide potentials in seedlings and leaves of plants at early growth stages has been highly researched, few works have looked beyond these stages, especially under variable environmental factors such as water deficit stress. Here, we evaluated 40 diverse sorghum lines for leaf dhurrin and soluble sugar content at various crop developmental stages and variable water availability. Five lines were identified with little‐to‐very low leaf dhurrin content across developmental stages and water availability. Leaves of 30‐d‐old sorghum plants had less cyanide potential than at later stages. A brief preflowering water stress, imposed at booting to flowering, decreased leaf dhurrin and soluble sugar contents, whereas a brief postflowering water stress or prolonged preflowering water stress increased dhurrin and soluble sugar contents. Rapid and efficient screening of dhurrin levels within existing sorghum germplasms could lead to the identification of additional lines with very low to nondetectable dhurrin levels, which will have an enormous impact on sorghum breeding and increase the agronomic value of the sorghum crop.
Prevalencia de caries dental según el índice CPOD en pacientes adultos chacchadores de hojas de coca.
Authors: Torres Portuguez Cinthya Gissella , Cisneros del Aguila Melvin
Published: June 2018

Objetivo: Se buscó determinar la prevalencia de caries dental, actitudes en el hábito del chacchado de coca y el índice CPOD en una población de adultos de 20 a 60 años. Material y métodos: La muestra correspondió a 365 chacchadores de coca; mediante un examen bucal previo se hizo una pre-selección de la población para incluirlos o excluirlos del estudio; los incluidos llenaron un cuestionario y se les realizó el examen odontológico correspondiente. Resultados: La mayor frecuencia de chacchado fue de  una vez al día (34%). El complemento más utilizado fue la cal (60%). La prevalencia de caries fue de (98%). El índice CPOD fue de 7,56. Conclusiónes: La cal y mishquina fueron complementos preferidos por el chachador; a mayor edad mayor cantidad de piezas perdidas y con indicación de exodoncia. La prevalencia de caries fue bastante elevada y el índice CPOD correspondió a un nivel de severidad muy alto.
PERFIL DE SUSCEPTIBILIDAD EN BACTERIAS COLONIZANTES AISLADAS DE CUCARACHAS EN UN HOSPITAL DE LIMA METROPOLITANA
Authors: Camones Villanueva Magna , Cabello Vilchez Alfonso Martin
Published: June 2018

Objetivo: Determinar el perfil de susceptibilidad y el Rango de resistencia de bacterias colonizantes aisladas en cucarachas deun Hospital de Lima Metropolitana. Material y Métodos: Estudio descriptivo de corte transversal en los meses de Junio y Julio del año 2015. Se preparó una trampa doméstica con cinta adhesiva para recolectar las cucarachas, se capturaron 100 cucarachas de la especie (Blatella germánica), de diferentes áreas dentro de un Hospital de Lima Metropolitana en un frasco estéril, el aislamiento de bacterias que colonizan en la parte externa de la cucaracha se realizaron por lavado con solución salina al 0,9%, se concentró la muestra, del pellet se realizó tinción de Gram y Ziehl Neelsen. Y se sembraron en medios Agar Sangre y Maconkey, para determinar género y especie por métodos manuales con medios TSI, LIA, CITRATO, UREA y SIM y susceptibilidad y resistencia se realizó por método de difusión o Kirby - Bauer. Los inóculos se sembró en agar Muller Hinton, los discos para Grampositivos (Ampicilina, Oxacilina, Eritromicina, Clindamicina, Vancomicina y cefazolina) y para Gramnegativos (Ciprofloxacino, Trimetroprim + sulfametoxazol, Amikacina, Ceftriaxona, Imipenem y Amoxicilina + Ac. Clavulánico), la lectura comparando con las tablas desarrolladas por NCCLS. Resultados: se aislaron bacterias Grampositivos, el 16% para Staphylococcus coagulasa - negativa 4% Streptococcus viridans y bacterias Gramnegativos 24% Serratiamarcescens, 4% Acinetobactersp, 36% Klebsiellapneumoniae, 4% Klebsiellaoxytoca, 8% Escherichiacoli y 4% para Pseudomona sp.Conclusiones: Streptococcus viridans,Klebsiellaoxytoca, y Escherichiacoli fueron los más relevantes y gran de importancia clínica altamente patógenos; causantes de infecciones intrahospitalarias.
Model of Islamic Religion Education 435 Based on Islam Nusantara on College
Authors: Zulfa Umi
Published: June 2018

This paper aims to provide an alternative model of Islamic Religion Education Based on Islam Nusantara on College, that make students able to emerge as wise leaders in the midst of Indonesian society and far from being exclusive. This research used qualitative approach with type of research library.  The result sawn that Islamic Religion Education model of Islam Nusantara in college is built from 435 Islam Nusantara concept that is a model consisting of four (4) character, they are spirit of religious education process. Namely: ruuhuddin (religious spirit), nationalism, ruuhudta'addudiyah (spirit of diversity) and ruuhul insaniyyah (spirit of humanity), built on 3 main pillars:  thought (fikrah), movement (harakah), real action (amaliyyah), and with 5 markers, namely islakhiyyah, tawazunniyah, tatawwuniyah, akhlaqiyah, and tasamuh.. Abstrak Tulisan ini bertujuan untuk memberikan model alternatif Pendidikan Agama Islam Berbasis Islam Nusantara di Perguruan Tinggi, yang membuat siswa mampu tampil sebagai pemimpin yang bijaksana di tengah masyarakat Indonesia dan jauh dari eksklusif. Penelitian ini menggunakan pendekatan kualitatif dengan jenis perpustakaan penelitian. Hasil penelitian menunjukkan bahwa model Pendidikan Agama Islam Islam Nusantara di perguruan tinggi dibangun dari 435 konsep Islam Nusantara yaitu model yang terdiri dari empat (4) karakter, yaitu semangat proses pendidikan agama. Yakni: ruuhuddin (semangat agama), nasionalisme, ruuhudta'addudiyah (spirit of diversity) dan ruuhul insaniyyah (semangat kemanusiaan), dibangun di atas 3 pilar utama: pemikiran (fikrah), gerakan (harakah), aksi nyata (amaliyyah), dan dengan 5 penanda, yaitu islakhiyyah, tawazunniyah, tatawwuniyah, akhlaqiyah, dan tasamuh.
Coupled finite-volume scheme with adapted Augmented Roe scheme for simulating morphological evolution in arbitrary cross-sections
Authors: Franzini F. , Soares-Frazao S.
Published: June 2018

A new coupled finite-volume scheme based on the Augmented Roe solver adapted to simulate morphological evolution of arbitrary cross-sections is presented. In pure hydrodynamic conditions, the Augmented Roe scheme has proven to provide accurate results and a constant discharge in steady-flow conditions. Here, this scheme is extended to solve the one-dimensional Saint-Venant–Exner system of equations written for arbitrary cross-sections. Therefore, new eigenvalues and source-term calculations are proposed to account for the irregular shape of the cross-sections. The performances of the proposed scheme are assessed by comparison with three different one-dimensional numerical models aimed at simulating morphological changes, with coupled or uncoupled approaches, and based on HLL or Roe-based flux calculations. Numerous test cases were examined, including water at rest, steady flows and transient flows for which experimental results exist. The results show that the proposed scheme provides stable and accurate results for a wider range of situations than is available with other classical models.
Dispositivos estatales, ilegalismos y prácticas sociales en la frontera Brasil-Paraguay (1890–2015)
Authors: Cardin Eric , Lima Cíntia Fiorotti
Published: June 2018

El objetivo de la investigación es analizar el desarrollo de las prácticas ilegales y sus relaciones con los aparatos de fiscalización y represión en la frontera Brasil-Paraguay, específicamente en los límites entre Foz de Iguazú-Ciudad del Este y Guaíra-Salto del Guairá. Metodológicamente, utilizamos entrevistas, fuentes bibliográficas y procesos criminales. A través del abordaje histórico sociológico, problematizamos las relaciones entre las prácticas ilegales y los aparatos estatales en tres momentos específicos, que representan periodos en los cuales el gobierno brasileño y los habitantes de las zonas referidas presentaron posiciones diferenciadas en relación con las fronteras. La investigación permitió concluir que la organización del mercado de trabajo y las vivencias de los habitantes de la frontera están relacionados con la intensidad de la presencia del Estado en la región estudiada.
COMPARAÇÃO E CLASSIFICAÇÃO DE RISCO ENTRE ETFS E SEUS ÍNDICES DE REFERÊNCIA
Authors: Arantes Pedro Paulo Melo , Souza Guilherme Santos , Penedo Antonio Sergio Torres , Pereira Vinícius Silva
Published: June 2018

Exchange Traded Funds (ETFs) são fundos negociados em bolsa de valores que foram a poucos anos incorporados no mercado de capitais brasileiro, fato ocorrido apenas em 2004. Dessa forma há poucos estudos sobre ETF, o que possibilita várias abordagens sobre sua temática e comparabilidade entre ETF, fundos e índices. Dessa forma este trabalho buscou comparar e classificar o risco das ETFs utilizando a medida de desvio-padrão e Índice Sharpe. Para isso utilizou-se de uma amostra intraday para as ETFs brasileiras no mês de outubro, avaliando numa perspectiva de curso prazo a variabilidade das ETFs. Os resultados indicam que há maior variabilidade do valor das ETFs se comparados com seus índices de referência, ainda o valor do Índice Sharpe apresenta valor negativo para a maior parte das ETFs estudadas, indicando uma valorização abaixo do índice de referência quanto ao prêmio pelo risco das ETFs.
As cidades dos santos doutores: a influência de Agostinho de Hipona na obra de Catarina de Siena
Authors: Medeiros Laureano Gabriel Moreira
Published: June 2018

Santa Catarina de Siena e Santo Agostinho de Hipona, dois santos agraciados com o título de doutores pela Igreja Católica produziram obras marcantes sobre espiritualidade e também Teologia. A primeira, pouco conhecida, oriunda de uma família burguesa de Siena, na Península Itálica, se viu aos vinte oito anos envolvida inteiramente em questões delicada de seu tempo. Encantando a todos com uma enorme erudição, Santa Catarina, por meio da oralidade, bebeu efusivamente da patrística e da tradição da Igreja. O objetivo deste artigo não está em desvendar os meandros da trajetória política da jovem santa de Siena, mas sim em compreender os embasamentos de seu discurso, chamando atenção, sobretudo, a grande influência exercida pelos escritos de Santo Agostinho.
Estudo da influência de cal hidratada na permeabilidade do concreto
Authors: Da Silva Fabiana Ferreira , Da Silva Fiuza Gizele Ferreira , Silva de Souza Bandeira Laura Heleonora , Da Costa Gomes Gustavo José
Published: June 2018

O emprego de teores de cal hidratada em materiais cimentícios promove alterações demandadas quanto ao seu uso em ambientes críticos. As adições dispostas visam intervir no consumo de hidróxido de cálcio oriundo da hidratação, que ocasiona a diminuição deste composto, levando a um estado superior de facilidade de entrada de íons corrosivos, promovendo desgaste da armadura, uma vez o pH diminuído devido a isto. Foram utilizados para análise, corpos-de-prova com aglomerantes com teores de 100% de cimento Portland, outros com 20% de adição de cal hidratada e os demais com 50% de adição do referido composto. Todos os teores possuem corpos-de-prova variando com o fator água/aglomerantes em 0,4; 0,5 e 0,6, com o intuito de investigar a contribuição da adição da cal hidratada na permeabilidade do concreto elaborado, em teste de permeabilidade e também seu aporte quanto às características físicas dos corpos-de-prova em ensaio de compressão mecânica. Observou-se que as massas elaboradas com a cal hidratada possuíam um menor índice de vazios, oriundo da evaporação da água, influenciando na permeabilidade da pasta, que contribui significativamente na permissividade de agentes agressivos.
ESTUDO DA UTILIZAÇÃO DO PVC COMO CONSTITUINTE DE CONCRETO RECILADO
Authors: Batista Alexandro Batalha , Dos Santos Leandro Rosa Januário , Ribeiro Marcela Saboya , Gomes Gustavo José Da Costa
Published: June 2018

Dentre os materiais empregue em uma obra, o PVC encontra-se entre os mais utilizados, resultando, portanto, em uma grande parcela constituinte do material total descartado, e por ser a base de petróleo, leva um tempo considerável para degradar-se no meio ambiente. Muito empregado na parte hidráulica, forros e conduítes, nem sempre seus resíduos acabam tendo um correto descarte. A resolução do CONAMA que define diretrizes para a efetiva redução dos impactos ambientais gerados pelos resíduos sólidos oriundos da construção civil, classifica esse tipo de material e ainda conta com medidas especificas para seu destino final, e baseando-se nisso, o artigo apresenta uma ideia para reuso do PVC no concreto, inserindo-o parcialmente no agregado miúdo. O PVC foi triturado e adicionado na massa de concreto CPRS III e apresentou valores decrescentes de resistência à compressão quando seu teor foi aumentado, e quando imerso, não houve diferença significativa na sua permeabilidade.
On the Relationship between Theory of Mind and Syntax in Clinical and Non-Clinical Populations: State of the Art and Implications for Research
Authors: Fontana Elena , Adenzato Mauro , Penso Jacopo S. , Enrici Ivan , Ardito Rita B.
Published: June 2018

Background:

Over the years, different explanations have been given on the relationship between syntax and Theory of Mind,i.e., the ability to attribute mental states to others and predict, describe, and explain behavior based on such mental states. In the present study, we focus on the relationship between false-belief understanding as a crucial aspect of Theory of Mind, and on the ability to master the syntax of complementation,i.e., the ability to produce and comprehend sentences in a recursive way.

Objective:

Our purpose is to test two main hypotheses on the relationship between false-belief understanding and the ability to master the syntax of complementation: the dependence and the independence of false-belief understanding on syntactic complementation.

Method:

We analyze studies on children with typical development, deaf children with deaf signing or hearing parents, children with specific language impairment, children diagnosed with autism spectrum disorder, longitudinal and training studies, and studies on adults with neuropsychological disorders.

Conclusion:

Strengths and weaknesses of the two hypotheses are discussed and limitations of the current state of knowledge are presented. A lifespan approach taking into account both the emergence and maintenance of false-belief understanding and using both implicit and explicit false-belief tasks is proposed to face the issue discussed.
Impact of mobile subscribers dual stack IPv4/IPv6 deployment
Authors: Pahlevi Mohammad Dian , Soewito Benfano
Published: June 2018

The use of CGNAT at PT. ZYX as a mobile telecommunication service provider cannot be relied as the solution to solve addressing needs against subscriber growth in future technology. Meanwhile, native IPv6 deployment is currently application-driven, which requires maturity support in either subscriber user equipment, network, and application itself. IPv4/IPv6 dual stack deployment was selected by PT. ZYX as stepping stone towards native IPv6 deployment. This paper analyzes the impact of dual stack IPv4/IPv6 deployment for mobile subscribers at PT. ZYX.  After selecting the dual stack approach and completing the deployment, test and measurements were performed to confirm the connectivity also against the performance and node utilization to conclude the impact. The test confirmed successful connectivity and the measurements showed that the deployment gives significant enhancement of routing table size and NAT table in node utilization and does not cause performance drop of hop count, throughput, and download time.
The Use of Social Media in Interprofessional Education: Systematic Review (Preprint)
Authors: Rankin Audra , Truskey Maria , Chisolm Margaret S
Published: June 2018

BACKGROUND

The implementation of interprofessional education (IPE) activities into health care education is a challenge for many training programs owing to time and location constraints of both faculty and learners. The integration of social media into these IPE activities may provide a solution to these problems.

OBJECTIVE

This review of the published literature aims to identify health care IPE activities using social media.

METHODS

The authors searched 5 databases (from the beginning coverage date to May 27, 2017) using keywords related to IPE and social media. Teams of 2 authors independently reviewed the search results to identify peer-reviewed, English language papers reporting on IPE activities using social media. They assessed the study quality of identified papers using the Medical Education Research Study Quality Instrument.

RESULTS

A total of 8 studies met the review’s inclusion criteria. Of these 8 papers, 3 had single-group, posttest-only study design; 4 had single-group, pre- and posttest design; and 1 had nonrandomized 3-group design. Qualitative and quantitative outcome measures showed mixed results with the majority of student feedback being positive.

CONCLUSIONS

Despite a need for additional research, this review suggests that the use of social media may aid the implementation of health care IPE.
Patterns Among 754 Gamification Cases: Content Analysis for Gamification Development (Preprint)
Authors: Park Sungjin , Kim Sangkyun
Published: June 2018

BACKGROUND

Gamification is one of the techniques that applies game elements, such as game mechanics and dynamics, to a nongame context (eg, management, education, marketing, and health care). A variety of methodologies have been published for developing gamification. However, some of these are only usable by people with a certain level of gamification knowledge. People who do not have such knowledge face difficulty in using game mechanics and experiencing enjoyment. To ease their difficulties, a gamification methodology should provide directions for using game mechanics.

OBJECTIVE

This study aimed at collecting global gamification cases and determining patterns or differences among the collected cases.

METHODS

In total, 754 cases were collected based on 4F process elements, such as play type, playful user experience (PLEX)–based fun factors, and game mechanics. In addition, the collected cases were classified into 6 categories. From the data analysis, basic statistics and correlation analyses (Pearson and Kendall) were conducted.

RESULTS

According to the analysis results in PLEX-based fun factors, challenge and completion fun factors formed a large proportion among the 6 categories. In the results of the game mechanics analysis, point, leaderboard, and progress accounted for a large proportion among the 6 categories. The results of the correlation analysis showed no difference or specific patterns in game mechanics (Pearson r>.8, Kendall τ>.5, P<.05) and PLEX-based fun factors (Pearson r>.8, Kendall τ>.7, P<.05).

CONCLUSIONS

On the basis of the statistical findings, this study suggests an appropriate number of PLEX-based fun factors and game mechanics. In addition, the results of this study should be used for people who do not have gamification knowledge and face difficulty using game mechanics and PLEX-based fun factors.
Роль біологічно активних речовин у формуванні гастроезофагеальної рефлюксної хвороби у хворих на цукровий діабет 2 типу
Authors: Sirchak Ye.S. , Boldizhar O.O. , Stan M.P.
Published: June 2018

Актуальність. У наш час недостатньо вивчені фактори, що впливають на перебіг і клінічні прояви гастроезофагеальної рефлюксної хвороби (ГЕРХ) у хворих на цукровий діабет (ЦД) 2 типу. Мета. Дослідження особливостей зміни рівнів простагландинів (Pg) І2 та F2α у сироватці крові залежно від клінічного перебігу ГЕРХ у хворих на ЦД 2 типу. Матеріали та методи. Обстежено 82 хворих на ГЕРХ і ЦД 2 типу (основна — 1 група) і групу порівняння (85 хворих на ГЕРХ — 2 група). Обстеженим пацієнтам у сироватці крові проводили визначення PgF2α та 6-кето-простагландину F1α (простациклін крові — PgI2). Результати. Скарги щодо органів травлення, характерні для ГЕРХ, установлено у 61,0 % пацієнтів 1 групи; у 22,0 % хворих із поєднаною патологією виявлено отоларингологічну; у 17,1 % обстежених — кардіальну форму ГЕРХ. У хворих на поєднану патологію більш виражене підвищення концентрації PgI2 із позастравохідними проявами ГЕРХ, особливо при його отоларингологічній формі (в 4,1 раза порівняно з показниками контрольної групи), тоді як у хворих при кардіальній масці ГЕРХ його концентрація підвищена у 3,5 раза, а у хворих зі стравохідними проявами ГЕРХ і ЦД 2 типу — у 3,0 раза. У хворих на ГЕРХ аналогічні зміни встановлено у 2,4 раза (отоларингологічні прояви), у 2,2 раза (кардіологічні прояви) та у 1,6 раза (типові прояви ГЕРХ) частіше. Висновки. ГЕРХ при ЦД 2 типу часто проявляється позастравохідною симптоматикою (отоларингологічна, кардіологічна форми). Максимальне підвищення рівня простацикліну у сироватці крові встановлено у хворих із позастравохідними проявами ГЕРХ у поєднанні з ЦД 2 типу, особливо його отоларингологічної форми.
Роль вісцеральної гіперчутливості в розвитку синдрому подразненого кишечника
Authors: Stepanov Yu.M. , Budzak I.Ya.
Published: June 2018

У статті розглядаються питання патогенеза синдрому подразненого кишечника. Детально розглянуто один з ключових патогенетичних факторів — вісцеральну гіперчутливість. Показані історичні аспекти вивчення, форми та способи оцінки вісцеральної гіперчутливості. Проаналізовані питання взаємовідносин вісцеральної гіперчутливості та інших факторів патогенезу синдрому подразненого кишечника.
Із Нехворощі — у світи Присвячується 150-річчю від дня народження М.М. Лучника
Authors: Chaban M.P. , Shevtsova Z.I. , Gaponov V.V.
Published: June 2018

Досліджено життєвий шлях, професійну й громадську діяльність земського лікаря Михайла Мусійовича Лучника (1868–?). Понад десять років він очолював Катеринославську колонію для душевнохворих, був громадським діячем, просвітянином, делегатом археологічного з’їзду, садівником, аматором театру, кооператором і експертом на престижній сільськогосподарській, промисловій і кустарній виставці в Катеринославі 1910 року.
Elementos para la evaluación de un programa académico de Ingeniería: Aportes desde los procesos de acreditación
Authors: Hernández Jiménez Daniel
Published: June 2018

La pretensión inicial de las presentes notas, es a portar algunos elementos que contribuyan con la comprensión del significado de la evaluación de un programa académico de Ingeniería, en el marco de los procesos de acreditación. La comprensiónse busca a través de la respuesta a tres interrogantes fundamentales: ¿Qué sentido tiene la evaluación del programa?, ¿qué finalidad tiene la evaluación del programa? y,¿cómo debe desarrollarse la evaluación del programa? como parte de un proceso que tiene la intencionalidad de acreditar públicamente la calidad del programa, por parteuna agencia constituida para tal fin; aunque no exclusivamente. Sin ánimo de desalentar otras interrogantes u otras alternativas de respuesta, se proponen elementos enmarcados en una concepción de la evaluación en general, que bien puedeadaptarse a la situación particular de la evaluación de un programa académico, que concibe a la evaluación como un proceso de diálogo, de comprensión y de mejora.Si bien las anotaciones se hacen pensando en una carrera de Ingeniería, con las adecuaciones y prevenciones del caso, las mismas se pueden aplicar a otros contextos académicos.
Estrategia para el diseño de programas académicos en línea: la experiencia de la Maestría en Educación a Distancia
Authors: Chaves Hidalgo Eugenia , Umaña Mata Ana Cristina
Published: June 2018

Este artículo presenta lineamientos para la planificación y ejecución de programas académicos en línea de la UNED. La Maestría en Educación a Distancia como proyecto en línea, surge como respuesta a la necesidad de fundamentar y compartir el desarrollo de una metodología de estudio que caracteriza la UNED. Este proyecto se inicia con planteamientos teóricos de expertos en el campo de la educación a distancia y virtual que sirvieron de sustento en el proceso inicial de diseño y que hoy día se convierten enrecomendaciones para quienes deseen emprender una tarea de este tipo. Se presenta la secuencia de etapas desarrolladas en este proceso de diseño y aquellas lecciones aprendidas que permiten orientar futuras acciones.
Puntos en común entre la Psicogenética y la neurogenética en relación al desarrollo humano, el conocimiento, las emociones y las funciones ejecutivas
Authors: Zárate Arguedas Nelson
Published: June 2018

El trabajo se ocupa de presentar inicialmente elementos teóricos básicos de la psicogenética y la neurogenética, para luego incursionar en una comparación sobre algunos puntos en común de las dos disciplinas. De ese modo se amplía el espectro explicativo de la neuropsicología infantil en relación con su desarrollo maduracional, la construcción del conocimiento, el papel de las emociones y las funciones ejecutivas. Palabras clave: psicogenética, epistemología genética, neurogenética, neuropsicología infantil, desarrollo maduracional, funciones ejecutivas.
Producción de melón (Cucumis melo L.) en invernadero: efecto de poda y densidad de siembra.
Authors: Díaz-Alvarado Jorge Manuel , Monge-Pérez José Eladio
Published: June 2018

Se evaluó el efecto de dos densidades de siembra (1,5 y 2,0 plantas/m2) y dos tipos de poda (un tallo secundario y dos tallos secundarios) sobre el rendimiento y la calidad del melón tipo Amarillo JMX-904 F-1 (Cucumis melo L. var. inodorus), en Alajuela, Costa Rica, entre marzo y julio de 2011. No se presentaron diferencias estadísticamente significativas entre tratamientos para el número total de frutos por planta, el peso promedio del fruto, el porcentaje de sólidos solubles totales, la firmeza de la pulpa, y la relación pulpa:cavidad del fruto. Se presentaron diferencias estadísticamente significativas entre tratamientos para el rendimiento total; el mejor tratamiento correspondió a plantas con poda a un tallo secundario y con una densidad de siembra de 2,0 plantas/m2, el cual produjo un rendimiento total de 27,5 ton/ha.
¿Desarrollo sostenible o sustentable? La controversia de un concepto
Authors: Rivera-Hernández Jaime Ernesto , Blanco-Orozco Napoleón Vicente , Alcántara-Salinas Graciela , Houbron Eric Pascal , Pérez-Sato Juan Antonio
Published: June 2018

Se presenta una revisión y discusión de los conceptos desarrollo sostenible y desarrollo sustentable, en el afán de aclarar su origen y dilucidar si los conceptos son o no sinónimos y si ambos son correctos y válidos. Se incluye un breve panorama de cómo se han usado ambos conceptos tanto en la literatura científica, como en textos y leyes gubernamentales y de divulgación; también se describe la controversia que se ha generado por el uso no diferenciado de estos términos y las corrientes de pensamiento que los sustentan. Se concluye que, a pesar de que lingüísticamente ambos términos son correctos y sinónimos casi perfectos, representan posturas e ideologías diferentes, ya que el “desarrollo sostenible”, representa un enfoque principal sobre el desarrollo y busca la manera que sea sostenido por medio del cuidado del ambiente y el “desarrollo sustentable”, enfatiza el cuidado de los recursos naturales y su uso, pero mediante un modelo que proteja el ambiente como prioridad.
Mujeres científicas en la prensa: análisis de reportajes de ciencia en diarios de España, México y Costa Rica
Authors: Mena Young Margoth
Published: June 2018

Los medios de comunicación son actores clave en el proceso de hacer llegar el conocimiento científico y tecnológico a la sociedad. Desde el campo de la Comunicación Pública de la Ciencia (CPC), el periodismo científico puede incidir en la construcción del binomio ciencia-mujer mediante los textos publicados en prensa nacional de referencia, mostrando que es posible trabajar en áreas científicas y tecnológicas, y aún más: poder tener una posición de liderazgo y reconocimiento. El objetivo de esta investigación fue caracterizar la presencia de mujeres científicas y voceras expertas en los grandes reportajes de ciencia y tecnología en los diarios El País de España, El Universal de México y La Nación de Costa Rica, con el fin de propiciar el reconocimiento público del aporte de la mujer en el campo científico y tecnológico. Se aplicó un análisis de contenido en la totalidad de grandes reportajes publicados durante el primer semestre del 2015, que fueron 155 textos. Como resultados principales del estudio, se comprueba que existe desequilibrio en la inclusión de fuentes expertas en los reportajes de ciencia de los tres diarios analizados, en los cuales se triplica la presencia de expertos masculinos sobre los femeninos, con una diferencia marcada según el campo del conocimiento. Además, la diversidad y la frecuencia de adjetivos en los textos, evidenció que el tratamiento de las fuentes expertas masculinas se asocia a jerarquía y autoridad formal, lo que no sucede con las mujeres expertas.
Panorama de la investigación y desarrollo de las nanotecnologías para el tratamiento de agua en México
Authors: Castañeda Olvera Rafael , Foladori Guillermo , León Silva Sein , Záyago Lau Edgar , Robles-Belmont Eduardo
Published: June 2018

El objetivo de este artículo es revisar el panorama acerca de las nanotecnologías para el tratamiento del agua en México, desde la investigación y desarrollo hasta los procesos y dispositivos disponibles en el mercado. El estudio abarcó un análisis bibliométrico de publicaciones científicas, una base de datos con los grupos de investigación sobre el tema, un catálogo de patentes y, finalmente, una descripción de las empresas mexicanas que producen instrumentos y dispositivos para descontaminar, purificar y desalinizar el agua. Pese a que no existe una estrategia nacional respecto a las nanotecnologías en nuestro país, de 2000 a 2015, se publicaron 115 artículos sobre el tema en 45 instituciones, lo cual coloca a México como país que aporta gran porcentaje de la investigación sobre el tema en la región; asimismo, hay empresas nacionales e internacionales que ofrecen opciones para el tratamiento del agua, a saber: dispositivos y materiales nanoestructurados, así como servicios para purificar el agua con nanopartículas.
Spectrophotometric determination of fluocortolone in tablets using 1,4-dihydrazinophthalazine
Authors: Cudina Olivera , Vladimirov Sote , Zivanov-Stakic Dobrila , Agbaba Danica
Published: June 2018

The proposed method for the determination of fluocortolone is based on the
formation of a stable, yellow coloured hydrazone product with
1,4-dihydrazinophthalazine as the reagent. Heating at 85?C for 2 h was found
to be necessary to ensure optimal hydrazone formation in acidified
1-propanol as the solvent. The detection limit was 1.2 ?g/ml. This method
when applied for the determination of fluocortolone in pharmaceutical
formulations gave precise and reproducible results.
Sesquiterpene lactones and monoterpene glucosides from plant species Picris echoides
Authors: Milovanovic Mirjana , Picuric-Jovanovic Ksenija , Djermanovic Miodrag , Djermanovic Verica , Stefanovic Milutin
Published: June 2018

Investigation of the constituents of the aerial parts of domestic plant
species Picris echoides afforded the sesquiterpene lactones, i.e.,
guaianolides jacquilenin (1), 11-epi-jacquilenin (2), achillin (3) and
eudesmanolide telekin (4). The chemical indentification of the two
monoterpene glucosides (-)-cis-chrysanthenol-b-D-glucopyranoside (5) and its
6?-acetate 6 is also repoted. The guaianolide achillin (3) and the two
monoterpene glucosides 5 and 6 were isolated for the first time from this
plant species. Isolation was achieved by column chromatography and the
structures were established mainly by the interpretation of their physical
and spectral data, which were in agreement with those in the literature.
Peracids oxidation of cholesta-5,8-dien-3β-yl acetate
Authors: Dabovic Milan , Petrovic Ivanka , Krstic Natalija , Lorenc Ljubinka
Published: June 2018

Expoxidation of cholesta-5,8-dien-3?-yl acetate (1) with peracids takes place
preferentially at the more highly substituted ?8-olefinic double bond to
give: (a) with monoperphthalic acid, 8?,9?-epoxycholest-5-en-3?-yl acetate
(2) (in 39 % yield) and 9?-hydroxy-5?,6?-epoxycholest-8(14)-en-3?-yl acetate
(3) (in 30 % yield); and (b) with m-chloroperbenzoic acid, the 8?,9?-epoxide
2 (64 %) and 5?,6?-epoxy derivative 3 (20%). Some chemical transformations
of the obtained epoxides are described.
Determination and structural correlation of the pKa values of p-substituted trans-2,3-epoxy-4-oxo-4-phenylbutanoic acids
Authors: Pfendt L. , Popovic G. , Kostic M. , Stevovic Lj. , Drakulic B. , Juranic I.
Published: June 2018

The pKa values for a series of eight p-substituted trans-2,3-epoxy-4-phenyl
butanoic acids (p-substituted trans-b-aroylepoxyacrylic acids) have been
determined potentiometrically in aqueous media at 25?C at an ionic strength
of 0.1 mol/dm3 (NaCl). The transmission of polar effects from the
substituents on the phenyl nucleus to the carboxylic group through the side
chain involving a carbonyl group and an epoxide ring was investigated. The
pKa values were correlated with structure using the Hammett, Taft and
Yukawa-Tsuno approaches. The Hammett r constant (0.34) was compared with
analogue values for structurally similar acids.
No Hückel graph is hyperenergetic
Authors: Gutman I. , Hou Y. , Walikar H.B. , Ramane H.S. , Hampiholi P.R.
Published: June 2018

If G is a molecular graph with n vertices and if ?1, ?2, ..., ?n are its
eigenvalues, then the energy of G is equal to E(G) = |?1| + |?2|+ ... +
|?n|. If E(G) > 2n - 2, then G is said to be hyperenergetic. We show that no
H?ckel graph (= the graph representation of a conjugated hydrocarbon within
the H?ckel molecular orbital model) is hyperenergetic.
The structure of bright zinc coatings
Authors: Nikolic Nebojsa , Popov Konstantin , Rakocevic Zlatko , Djurovic Dejan , Pavlovic Miomir , Stojanovic Miodrag
Published: June 2018

The structures of bright zinc coatings obtained from acid sulfate solutions
in the presence of dextrin/salicyl aldehyde mixture were examined. It was
shown by the STM technique that the surfaces of bright zinc coatings are
covered by hexagonal zinc crystals, the tops of planes of which are flat and
mutually parallel and which exhibit smoothness on the atomic level. X-Ray
diffraction (XRD) analysis of the bright zinc coatings showed that the zinc
crystallites are oriented in the (110) plane only.
Characterization of water-in-oil emulsions produced with microporous hollow polypropylene fibers
Authors: Vladisavljevic Goran , Brösel Sabine , Schubert Helmar
Published: June 2018

The preparation of fine and monodispersed water-in-oil (W/O) emulsions by
utilizing hydrophobic hollow polypropylene fibers with 0.4 mm pores was
investigated in this work. The experiments were carried out using
demineralized water as the disperse phase, mineral oil Velocite No. 3 as the
continuous phase, and polyglycerol polyricinoleate (PGPR 90) in the
concentration range of 2.5 - 10 wt % as the oil-soluble emulsifier. The size
of the water droplets in the prepared emulsions and the droplet size
distribution strongly depend on the content of the disperse phase, the
transmembrane pressure difference, and the emulsifier concentration. Stable
emulsions with a very narrow droplet size distribution and a mean droplet
diameter lower than 0.27 ?m were produced using 10 wt % PGPR 90 at a
pressure difference below 30 kPa.
Non-linear frequency response of non-isothermal adsorption controlled by micropore diffusion with variable diffusivity
Authors: Petkovska Menka
Published: June 2018

The concept of higher order frequency response functions (FRFs) is used for
the analysis of non-linear adsorption kinetics on a particle scale, for the
case of non-isothermal micropore diffusion with variable diffusivity. Six
series of FRFs are defined for the general non-isothermal case. A
non-linerar mathematical model is postulated and the first and second order
FRFs derived and simulated. A variable diffusivity influences the shapes of
the second order FRFs relating the sorbate concentration in the solid phase
and t he gas pressure significantly, but they still keep their
characteristics which can be used for discrimination of this from other
kinetic mechanisms. It is also shown that first and second order particle
FRFs offter sufficient information for an easy and fast estimation of all
model parameters, including those defining the system non-linearity.
Research on carbon fiber reinforced thermal polymer/stainless steel laser direct joining
Authors: Jiao Junke , Xu Zifa , Wang Qiang , Zan Shaoping , Zhang Wenwu
Published: June 2018

To improve the numerical simulation accuracy of carbon fiber reinforced thermal polymer (CFRTP)/stainless steel laser direct joining (LDJ), a fitting formula of thermal contact conductance was established based on experiments in this paper. Taking into account the thermal contact resistance, a three-dimensional finite element thermal contact model of LDJ was established, and the theoretical simulation and experimental results were compared and analyzed. The result showed that the thermal contact model was more consistent with the reality compared with the traditional model. This thermal contact model could be used to characterize the influence of clamping pressure on the laser joining quality. When the laser power was 318 W and the clamping pressure was 0.1 MPa, the relative error of the melting width was 17.8% for the traditional model and 6.7% for the thermal contact model considering the thermal conductivity. The numerical simulation accuracy could be improved in the process of LDJ. With this numerical model, relationships between the thermal behaviors and the joining parameters were studied numerically. The CFRTP/stainless steel laser joining experiments were also carried out, and the result showed that the joint width measured agreed well with the numerical result.
Study on weld formation and its mechanism in laser-TIG hybrid welding with filler wire of a titanium alloy
Authors: Shi Jipeng , Song Gang , Wang Hongyang , Liu Liming
Published: June 2018

A series of laser-tungsten inert gas hybrid welding with filler wire experiments were performed on the TA15 titanium alloys to investigate the effect of welding parameters, such as the distance between the axis of the laser beam and the tip of the tungsten electrode (Dla), the defocused distance of the laser beam, and its CO2 concentration in the shielding gas, on the weld appearance and dimension. The mechanism of the weld formation was then analyzed. The results demonstrated that by adjusting space position between the heat sources and protecting the shielding gas content, the undercut defect could be suppressed effectively in the hybrid welding process. With the increase in the Dla, defocused distance, and CO2 concentration, the width of the top weld presented an increasing trend, while the width and reinforcement of the backside showed a decreasing trend. The ridgelike appearance may be effectively suppressed if the Dla, defocused distance of the laser beam, and CO2 concentration in the argon shielding gas were more than 2 mm, 4 mm, and 2%, respectively, because the Dla, defocused distance, and CO2-determined energy concentration, surface tension, and Marangoni convection determine the molten metal flow direction.
VERSATILE MEASURING DEVICE FOR THE STUDY OF MAGNETIC PROPERTIES OF SOLIDS
Authors: COSMA Ioan
Published: June 2018

As a zero apparatus, our measurement device is based on the Faraday method. We have made two compensation systems; mechanical and electromagnetic. It is adapted to the translational movements for insertion of the sample between the poles of the electromagnet that creates a field with an appropriate gradient of operation. To the balance can attach either a non-inductive furnace that provides sample heating up to 1900 K, or a cryostat that provides a controlled cooling temperature and a return temperature between ambient and to liquid nitrogen temperature. Susceptibility and magnetization are assessed in a relative mode; calibration using standard samples of high trust. Magnetic properties studies, versus temperature and intensity the magnetic field, on hundreds materials of thousand different metallic, vitreous and crystalline and oxidic superconductor samples, have been confirmed with similar research, demonstrating the versatility and utility of our measuring system for many years.