bluuebunny/crossref_metadata_2025 huggingface dataset:
The effect of absenteeism and school failure in the consumption of snuff in a sample of students in 3rd and 4th of Secondary Education / El efecto del absentismo y el fracaso escolar en el consumo de tabaco, en una muestra de estudiantes de 3º y 4º (...)
Authors: Corbí Gran Beatriz , Pérez Nieto Miguel Ángel
Published: November 2017

Objetivos: El presente estudio tiene como objetivo ver la relación existente entre el sexo, el absentismo escolar y la repetición de curso junto al consumo de tabaco en adolescentes de 3º y 4º de la ESO. Método: Los participantes de este estudio fueron un total de 688 adolescentes. Dichos participantes fueron extraídos de la población total (N= 7.832) de adolescentes de 3º y 4º de la ESO de Vitoria (Álava). Para recoger dichos datos se utilizó el cuestionario de la Encuesta Estatal sobre uso de drogas en Enseñanza Secundaria (ESTUDES). Resultados: Los resultados del estudio muestran una prevalencia de consumo de tabaco mayor por parte del sexo femenino en comparación con el masculino. Así mismo, aquellos sujetos que realizan un mayor consumo son quienes más faltan a clase o quienes obtienen un mayor fracaso escolar repitiendo uno o varios cursos. Conclusiones: Las consecuencias negativas experimentadas por el consumo de tabaco reflejan el alto riesgo de fracaso o absentismo escolar. Consecuencias que se deberían tener en cuenta en los próximos programas preventivos con el objetivo de la reducción del daño. AbstractObjectives: This study aims to see the relationship between sex, school absenteeism and grade repetition by the consumption of snuff in adolescents 3 º and 4 º ESO. Method: Participants in this study were a total of 688 adolescents. These participants were drawn from the total population (N = 7832) of teenagers from 3rd and 4th of ESO of Vitoria (Alava). To collect the data we used the National Survey on Drug Use in Secondary Education (ESTUDES). Results: The results of the study show a prevalence of snuff increased by females compared with males. Also, those subjects who made ​​more consumption are the ones who miss class or who obtain a higher school failure repeating one or more courses. Conclusions: The negative consequences experienced by the consumption of snuff reflect the high risk of failure or truancy. Consequences should consider preventive upcoming programs in order to harm reduction.
Medios de comunicación y consumo de alcohol en adolescentes: ¿qué dicen los expertos?
Authors: Suárez Relinque Cristian , Del Moral Gonzalo , Musitu Gonzalo , Villarreal-González María
Published: November 2017

El objetivo del presente estudio es conocer la opinión de profesionales expertos en adolescencia, familia, escuela, medios de comunicación y políticas locales, respecto al rol que desempeñan los medios de comunicación en el consumo de alcohol en los adolescentes.  Se ha realizado una investigación cualitativa siguiendo el esquema propuesto por la Teoría Fundamentada (Grounded Theory) (Glaser y Strauss, 1967).  La información se ha obtenido a partir de Grupos de Discusión guiados por entrevistas semiestructuradas.  Participaron en el estudio 32 expertos nacionales.  La conclusión principal es que los expertos entrevistados perciben que los medios de comunicación desempeñan un importante rol educativo en el consumo de alcohol e identifican siete aspectos clave (subcategorías) en el comportamiento de los medios que suponen factores de riesgo para el consumo en los adolescentes, los cuales se agrupan en tres categorías (modelado en hábitos no saludables, imagen sesgada del adolescente y falta de rigor en la información).
Programa de prevención del consumo de drogas Saluda: evaluación de una nueva versión en adolescentes españoles
Authors: Hernández Serrano Olga , Espada Sánchez Jose Pedro , Orgilés Mireia , García Fernández Jose Manuel
Published: November 2017

En la actualidad se han evaluado numerosas intervenciones preventivas de drogodependencias en el medio escolar. Sin embargo, en España son pocos los estudios que analizan la influencia precisa de cada uno de los componentes específicos a los programas con el fin de determinar cuáles se consideran cruciales para el cambio de conducta de consumo. El objetivo del presente estudio fue evaluar los efectos de una nueva versión del programa de prevención del consumo de drogas Saluda en la que se prescinde del componente fomento del ocio saludable y las tareas para casa. Esta versión reducida fue dirigida a una muestra de 106 escolares (44.6 % chicos) entre 14 y 17 años (M = 15.20; DT = 0.92) de un centro de Educación Secundaria. Se trata de un estudio exploratorio de tipo cuasi experimental y un diseño pre-post de un único grupo. Se realizó diferencia de proporciones mediante la prueba Z y diferencia de medias mediante la prueba T para muestras relacionadas. Los resultados muestran una reducción en el porcentaje de episodios de embriaguez, así como un efecto de mejora significativa sobre las variables protectoras del consumo. Se discuten estos hallazgos y se realizan propuestas para la mejora de futuras intervenciones.
Sex practices and knowledge about HIV/AIDS among drug users in a low-income urban community of Costa Rica
Authors: Chacón Ortiz Manuel , Barrantes Kenia , Achí Rosario , Comerford Mary , McCoy, Clyde
Published: November 2017

HIV/AIDS transmission among drug users is associated with education, sex practices and substance use. This study examined 159 drugs users’ knowledge, beliefs and sex behavior related to HIV/AIDS risk in Costa Rica.  Results showed considerable use of marihuana, alcohol, crack and cocaine and a very low lifetime incidence of other drugs. All substance use patterns were higher than national averages. Respondents showed a high level of knowledge about HIV/AIDS transmission and prevention. However, there did not seem to be a relationship between knowledge and practice. Unprotected sex was common and having an HIV/AIDS test was not a regular practice. Knowledge about HIV/AIDS is not a determinant factor for condom use among this group. It is concluded that having the proper knowledge about transmission and prevention does not guarantee safe sex practices. Further research and public health evidence based practices for HIV/AIDS prevention should target drug user population
Análisis de la información en la prevención del consumo de drogas y otras adicciones
Authors: García del Castillo Rodríguez José A. , López-Sánchez Carmen , García del Castillo-López Álvaro , Dias Paulo C.
Published: November 2017

Tradicionalmente gran parte de los programas preventivos de drogas y otras adicciones dirigidos a preadolescentes y adolescentes, se han apoyado en la información como estrategia fundamental para disuadir el consumo, utilizando argumentos basados en las consecuencias del deterioro al ser consumidores de sustancias, así como en el abuso de otras conductas adictivas no químicas. El enfoque clásico se apoya en que los jóvenes toman sus decisiones de consumir, o no, en base a una elaboración racional, por tanto en el caso de estar informados de los riesgos que asumen al consumir optarían por no hacerlo. Es fundamental incidir en la importancia que adquieren tres cuestiones alrededor de la información: el nivel y calidad de la información que tienen los jóvenes, el nivel y calidad de la información que tienen los padres y la búsqueda de las fuentes de información sobre drogas y su nivel de credibilidad. Posiblemente los modelos de transmisión y contenido de información que utiliza la publicidad comercial podrían ser más adecuados y eficaces que los del recurso al miedo en el ámbito de los comportamientos de salud, y por supuesto, de las adicciones en general. La tendencia de los promotores de mensajes de salud sigue siendo la de transmitir las consecuencias y los riesgos, en la línea de la apelación al miedo. Presumimos que se alcanzaría una mayor eficiencia con mensajes positivos, reforzando los estilos de vida saludables.
Relación entre el riesgo de suicidio, estrategias de afrontamiento y autoeficacia en dependientes del alcohol.
Authors: Jiménez García Karina , Carballo José Luis , Cano Poveda Mª Ángeles , Marín-Vila María
Published: November 2017

El suicidio es una problemática que se encuentra asociada al consumo de alcohol y otras sustancias. En este estudio se analizó la relación entre el riesgo suicida, las habilidades de afrontamiento y autoeficacia en pacientes aclohólicos. Participaron un total de 75 sujetos con diagnóstico de trastorno por consumo de alcohol y que reciben tratamiento ambulatorio. Se evaluó el historial de consumo de sustancias, tratamientos previos y posibles antecedentes psiquiátricos. Asimismo, se utilizaron diferentes cuestionarios para evaluar variables relacionadas con la identificación de situaciones de riesgo, estrategias de afrontamiento, autoeficacia y la probabilidad de riesgo suicida. Los resultados mostraron diferencias estadísticamente significativas en las variables de identificación de situaciones de riesgo y autoeficacia. Estos hallazgos pueden ser útiles de cara tener en cuenta la importancia de los programas de prevención de recaídas no solamente en relación al consumo de alcohol si no en la reducción del riesgo de intentos suicidas.
Consumo de alcohol en adolescentes del Estado de Guerrero, México
Authors: Telumbre Terrero Juan Yovani , Sanchez Jaimes Blanca Estela
Published: November 2017

El consumo de alcohol representa un problema creciente se salud pública, debido a los consecuencias que ocasiona en el individuo, la familia y la sociedad, además de ser la sustancia psicoactiva más usada por la población en general. En base a lo anterior el objetivo del estudio fue determinar el tipo consumo de alcohol en adolescentes del estado de Guerrero. Por lo cual se llevó a cabo un estudio transversal descriptivo en 292 adolescentes del Estado de Guerrero. Se identificó que el 72.1% de los adolescentes han consumido alcohol alguna vez en la vida y el 46.9% en el último año, la edad de inicio del consumo de alcohol fue a los 14.4 años. En relación al tipo de consumo de alcohol predomino un consumo perjudicial en el 38% de los adolescentes, seguido por un consumo de riesgo de alcohol (37.2%) y el 24.8% presenta síntoma de dependencia al alcohol. Los resultados muestran que el consumo de alcohol en los adolescentes representa un problema prioritario de salud, lo cual hace necesario el diseño e implementación de programas de prevención dirigidas a este grupo de la sociedad.
Efectos de la impulsividad y el consumo de alcohol sobre la toma de decisiones en los adolescentes
Authors: Caña María Laura , Michelini Yanina , Acuña Ignacio , Godoy Juan Carlos
Published: November 2017

Fundamentación: la adolescencia es un período asociado al inicio y la progresión del consumo de alcohol. En esta etapa también son frecuentes las conductas impulsivas y la toma de decisiones (TD) riesgosas. Objetivo: evaluar el patrón de consumo de alcohol (PCA) de adolescentes masculinos y femeninos, sus distintos niveles de impulsividad y cómo afectan estas variables a la toma de decisiones. Metodología: Mediante un análisis de clases latentes se determinaron diferentes PCA de 230 adolescentes de 14 a 17 años. Diseño: se utilizó un diseño ex post facto prospectivo factorial con los factores Urgencia Positiva (Baja/Alta), PCA (Moderado/Binge) y Sexo (Femenino/Masculino). Se evaluó la TD en los 78 participantes que integraron los grupos del estudio. Resultados: los consumidores varones binge, en comparación con los moderados, mostraron un mejor desempeño, pero su rendimiento disminuyó al final de la prueba. Dentro del grupo de los participantes con baja urgencia positiva, aquellos con un patrón de consumo tipo binge, realizaron TD más ventajosas. Conclusiones: El PCA y la impulsividad rasgo parecen influir sobre la TD de los adolescentes.
Full Number / Número Completo: Volumen 15, Número 1
Authors: García del Castillo Rodríguez José A.
Published: November 2017

Número completo de Enero 2015
Diferencias en los Niveles de Ira en Deportistas Fumadores
Authors: González García Higinio , Pelegrín Muñoz Antonia , Carballo Crespo José Luis
Published: November 2017

a) Introducción. La práctica de Actividad física disminuye los niveles de ira, de consumo de tabaco, y facilita la posibilidad de dejar de fumar.b) Objetivos. Los objetivos de esta investigación fueron, comprobar la relación entre la ira y el consumo de tabaco en deportistas, conocer las diferencias en los niveles de ira en función de las horas de entrenamiento deportivo en deportistas fumadores y comprobar las diferencias en los niveles de ira en función del número de cigarrillos diarios en deportistas.c) Metodología. La muestra se compuso de 502 deportistas. Se utilizó un cuestionario sociodemográfico ad hoc, el Inventario de Expresión de la Ira Estado-Rasgo STAXI-2 y la escala de Oviedo de Infrecuencia de Respuesta (INF-OV).d) Resultados. Se encontraron diferencias significativas (p < .05) en ira rasgo, temperamento y expresión externa de la ira, a favor de los deportistas fumadores. No se encontraron diferencias significativas en la ira en función de las horas de entrenamiento y el número de cigarrillos diario.e) Conclusiones. Los deportistas fumadores presentaron mayores niveles de ira rasgo, expresión externa de la ira y temperamento.
Adaptación y validación de la escala de nomofobia de Yildirim y Correia en estudiantes españoles de la Educación Secundaria Obligatoria
Authors: Ramos-Soler Irene , López-Sánchez Carmen , Quiles-Soler Mª Carmen
Published: November 2017

Aunque no se trata de un fenómeno reciente, la Nomofobia (No Mobile Phone Phobia) entendida como una adicción comportamental que implica un alto temor a quedarse sin teléfono móvil, está siendo objeto de investigación desde diferentes disciplinas dada las importantes consecuencias que se están observando entre la población más joven. Sin embargo, son pocos los instrumentos capaces de medir esta adicción no reconocida como tal por el DSM-V. En el presente trabajo se ha llevado a cabo el proceso de adaptación y validación de la escala de medición de la Nomofobia de  Yildirim y Correia. Para ello se procedió a una adaptación lingüística y cultural de la misma, seguida de una revisión por parte de expertos en la materia. La decisión del grupo de expertos supuso una modificación de la redacción y la inclusión de un nuevo ítem. La escala resultante se aplicó a una muestra de 372 estudiantes de Educación Secundaria Obligatoria, en institutos públicos de la provincia de Alicante. Los resultados permitieron la validación de la escala objeto de este estudio.
Access to documentation and training in pathological gambling / Acceso a la documentación y formación en juego patológico
Authors: Martín del Río Beatriz , Cortés Tomás Maite
Published: November 2017

Con objeto de cubrir la necesidad de actualización constante del conocimiento en el área específica del juego patológico en España se desarrolla este artículo como una guía para el acceso rápido y directo a la formación/ información y la búsqueda de bibliografía en este tópico. Para ello, ésta se configura en dos apartados: uno de documentación, que incluye las principales bases de datos, publicaciones periódicas, libros y manuales, así como tesis doctorales, y otro sobre la formación tanto general como continuada. AbstractWe develop this article as a guide for the direct and fast access to the education/information and the bibliographic search, because of the need of constant updating of the knowledge in the specific area of the Pathological Gambling in Spain. It is configure in two sections, one about documentation, that includes the databases, periodical publications, books and manuals, as well as the doctoral dissertations, and on the other hand, about training, general as well as continued.
Familiar consequences of pathological gambling: a critical review / Repercusiones familiares del juego patológico: una revisión crítica
Authors: Autor Autor
Published: November 2017

En este trabajo se presenta un análisis de las principales repercusiones familiares del juego patológico. Se revisan los estudios sobre las consecuencias físicas y psicológicas observadas en la pareja –habitualmente, la mujer– del jugador, en los hijos y, en el caso de ludópatas adolescentes, en los padres. Los resultados de la revisión ponen de manifiesto que el impacto del juego patológico va más allá del paciente afectado y se observa la presencia de repercusiones concretas en los familiares cercanos. Sin embargo, los resultados obtenidos hasta la fecha no son concluyentes. Se carece de estudios empíricos rigurosos sobre este tema. Por último, se comentan las implicaciones clínicas de las repercusiones familiares para el tratamiento del juego patológico. AbstractIn this paper, the main family consequences of pathological gambling are described. Studies about physical and psychological consequences in gambler’s partners –primarily, females–, in children and, in the case of  adolescent pathological gamblers, in parents, are reviewed. Results show that the family impact of pathological gambling is very important. However, the results of studies are not conclusive. Finally, clinical implications of these family consequences for pathological gambling treatment are commented upon.
Clinical aspects of gambling: a non conventional addiction / Aspectos clínicos de la conducta adictiva al juego: una de las adicciones no convencionales
Authors: Vacca Rodríguez Ricardo
Published: November 2017

En la actualidad el campo de las adicciones se ha ampliado ante la aparición de una patología similar a las adicciones a las sustancias químicas pero donde no existe una sustancia psicoactiva, denominadas conductas adictivas, o adicciones no convencionales. Através de los últimos años se ha comprobado que ciertos individuos son más sensibles a desarrollar una conducta adictiva hacia objetos actividades o personas o un mismo individuo puede desarrollar unas conductas adictivas y a la vez una adicción a drogas. En cambio otras pueden desarrollar con mayor facilidad una conducta adictiva a las actividades, a las máquinas u objetos o a las personas de manera exclusiva, permanente y/o sucesiva, a la cual se le denomina personalidad adictógena. Una de estas patologías es la conducta adictiva al juego llamada también ludopatía y es la que desarrollaremos en este trabajo. Se presentan las características clínicas del trastorno, las diferentes etapas del proceso adictivo, incidiendo en los mecanismos cognitivos. Se propone una clasificación del adicto al juego. AbstractThe addicionology field is more extensive these days than many years ago because it comes up pathology some at chemical substance addiction but there aren't a psychoactive substance in use, this pathology is calling for the specialists "addictive behaviors" or none conventional addictions. Through the years in clinical and hospitals we can see that some people are more sensitive to develop an addictive behavior besides a chemical addiction, and others can develop easily an addiction to the activities, machines, objects or persons of exclusive permanent and successive way. One of this interesting and complexity pathology is the gambler addictive behavior, calling also ludopatia and the following are the clinical profile. Characteristics of gambling are presented, the stages of the addictive process, especially on cognitive mechanisms. A classification of gambler is presented.
Social education: Study programs and drug-addiction / Educación social: planes de estudio y drogodependencias
Authors: Bas Peña Encarna
Published: November 2017

No disponible.
Full number: Volume 6, Number 2 / Número completo: Volumen 6, Número 2
Authors: De diciembre de 2006. Número completo
Published: November 2017

Full number: Volume 6, Number 2 / Número completo: Volumen 6, Número 2.
New addictions, different reintegration. Intervention for the readjustment to a market of work in constant change / Nuevas adicciones, diferente reinserción. Intervención para la readaptación a un mercado de trabajo en constante cambio
Authors: Sanz Gabriel Felisa , Monsalve Juan E.
Published: November 2017

El siguiente artículo es una refl exión sobre las características de laspersonas en tratamiento por drogodependencias y su adaptación a las condiciones que requiere el mercado de trabajo actual. Tras una breve exposición de la Asociación Red ARAÑA (entidad pionera en la inserción sociolaboral de colectivos en riesgo de exclusión) y su trayectoria, se desarrollan unas breves línea acerca del concepto de exclusión y las dimensiones que incluye, la imagen de las personas ex drogodependientes como grupo en exclusión y/o riesgo de exclusión, y los cambios que se están produciendo en los últimos años y que afecta a sus características biológicas, psicológicas y sociales, y a su imagen social. Este nuevo perfi l de la persona consumidora de drogas necesita de una nueva forma de intervenir desde cualquier proyecto de inserción sociolaboral. Esa intervención parte de una adaptación exhaustiva a las condiciones del mercado de trabajo, un mercado de trabajo en constante cambio. AbstractThe following article is a refl ection about the persons in drugdependency treatment characteristics and their adaptation to theconditions required for the current labour market. After a brief description of “Red Araña Association” (a pioneer entity in the sociolabour insertion for socially excluded collectives) and its trajectory, we expound a few lines about the exclusion concept and the dimensions included, the ex-drug dependents image as a socially excluded collective or at risk of being excluded, and the changes produced during the last years affecting their biological, psychological and social characteristics, and their social image. This new profi le about persons with a history of substance misuse needs a new way of intervention at any sociolabour inclusion project. This intervention is based in a labour market conditions exhaustive adaptation, a labour market in a permanent transformation.
Differences in cognitive abilities among young women alcohol users / Diferencias en habilidades cognitivas entre jóvenes universitarias consumidoras de alcohol
Authors: Carballo José Luis , García Gabriela , Jáuregui Valentina , Saez Moya Adrián
Published: November 2017

La evidencia empírica ha mostrado que el consumo abusivo de alcohol puede repercutir negativamente en determinadas funciones cognitivas.El objetivo de este artículo ha sido analizar si existe relación entre el consumo de alcohol y determinadas habilidades cognitivas (memoria, percepción y razonamiento) en jóvenes universitarias. Se han utilizado varios cuestionarios para recoger el perfil adictivo de las jóvenes y para evaluar el rendimiento de los sujetos en tareas que implican ciertas habilidades cognitivas. Participaron 100 mujeres, de entre 18 y 25 años, distribuidas en dos grupos: consumidoras de riesgo (n=31) y consumidoras de bajo riesgo (n=69), siguiendo los criterios de la OMS. En cuanto a losresultados, por un lado, el grupo de las consumidoras de riesgo mostró un patrón de consumo más grave en términos de uso de otras sustancias, frecuencia de consumo y porcentajes de cumplimiento de criterios de abuso. Por otro lado, en cuanto a las habilidades cognitivas se encontraron diferencias significativas entre grupos en razonamiento abstracto y en percepción. Los resultados muestran tendencias de cómo el consumo abusivo de alcohol podría afectar al funcionamiento cognitivo de las mujeres jóvenes. Futuros estudios podrían profundizar en estos déficits y aportar luz en la mejora de las técnicas terapéuticas y preventivas en este campo.  Abstract Empirical evidence has shown that alcohol abuse may negatively affect to certain cognitive functions. The aim of this paper was to analyze the relationship between alcohol consumption and certain cognitive abilities (memory, perception and reasoning) in university students. Two questionnaires were used to assess the young women addictive profile and to assess several the subjects’ performance on tasks involving cognitive skills. A total of 100 women between 18 and 25 years, divided into two groups following the WHO criteria was involved in the study: consumers at risk (n = 31) and low-risk users (n = 69). In terms of results, on the one hand, the consumers at risk group showed a more severe pattern of consumption in terms of substance, frequency of consumption and rates of fulfill criteria for abuse. Furthermore, in terms of cognitive abilities significant differences between groups in abstract reasoning and perception were found. The results show trends of how alcohol abuse might affect cognitive functioning in young women. Future studies could deepen the deficit and bring light into the improvement of preventive and therapeutic techniques in this field.
Psychometric properties of the HIV/AIDS Knowledge Scale for Spanish adolescents (HIV-KS) / Propiedades psicométricas de la Escala de Conocimientos sobre VIH/SIDA para adolescentes (VIH-KS)
Authors: Espada José P. , Huedo-Medina Tania B. , Orgilés Mireia , Secades Roberto , Ballester Rafael , Remor Eduardo
Published: November 2017

El objetivo de este trabajo consistió en desarrollar y analizar las propiedades psicométricas de una escala multidimensional para evaluar los conocimientos relacionados con el VIH/SIDA en adolescentes (Escala de conocimientos sobre VIH/SIDA, HIV-KS). Tras un estudio piloto se administró un cuestionario de 48 ítems a una muestra de 14 centros escolares de 5 provincias españolas. Se puso a prueba la estructura teórica del cuestionario mediante un análisis de componentes principales al que se le aplicó un análisis confirmatorio. Se analizó la validez convergente y discriminante y la fiabilidad de la escala y, finalmente, se procedió a comprobar su invarianza factorial en función del género y la edad con una muestra de 1216 participantes. La versión final de HIV-KS estuvo compuesta por 10 ítems distribuidos en 3 factores principales. Los factores incluidos fueron (1) Transmisión oral del VIH, (2) Efectos del VIH, y (3) Otras vías de transmisión del VIH. La escala HIV-KS muestra invarianza en función del género y la edad y buena consistencia interna. HIV-KS es una escala capaz de evaluar de forma rápida y eficaz el grado de conocimientos sobre VIH/SIDA en población adolescente.  Absctract This paper aims to describe the development process, the factor structure, the reliability and validity of a multidimensional scale to measure HIV/AIDS-related knowledge for adolescents (HIV/AIDS Knowledge Scale, HIV-KS). After a pilot study of the items, a questionnaire of 28 items was administered to a sample from 14 different schools in 5 counties in Spain. Firstly, Principal-component analysis was used: first, to test a theory-driven structure and second, to develop an empirically derived factor structure for HIV-KS, which was tested with a confirmatory factor analysis. Secondly, reliability and convergent and discriminant validity were examined and finally, the factorial invariance was analyzed according to gender and age with a sample of 1,216 Spanish adolescents.The final version of the HIV-KS consists of 10 items distributed across three major factors. The factors included are: (1) HIV oral transmission, (2) HIV effects, and (3) other HIV transmission methods. The HIV-KS is invariant across gender and age and shows good validity and internal reliability. HIV-KS is a capable and parsimonious self-report scale for assessing main aspects of HIV/AIDS-related knowledge for adolescents.
Molecular Modeling of Organic Materials for Flow Simulation and Digital Source-Rock Physics
Authors: Feng Feng , Akkutlu I. Yucel
Published: November 2017

Model development for organic materials such as kerogen and bitumen using molecular building blocks is an important and fast-evolving science for source rock characterization. However, the size of the current models is much smaller than the representative elementary volume of organic in order to describe the macroscopic quantities such as diffusion coefficents and permeability. In addition, pore size distribution of the current models is skewed towards the lower end such that the predicted quantities are inaccurate.

A new methodology is presented to build larger organic models to overcome the scale-dependence issue. A solid organic skeleton can be built using 3D tomographs which can be obtained from high-resolution microscopy such as TEM. The skeleton is populated with atoms distributed based on the organic matters maturity and elemental composition. As part of the new methodology to build larger organic model, we replace the atoms that make up the skeleton with an average representative atom whose bond length with the surrounding representative atoms is tuned to maintain the solid density and the structure of the skeleton unchanged. The average force field parameters are calculated based on kerogen's elemental composition. Permeability of this simplified organic model is measured using molecular dynamics simulation of steady-state fluid flow through the model pore-network.

When the transport simulation results of the simplified organic model are compared to its counterpart carrying exact molecular description, the simplified model is accurate for the calculations of permeability, tortuosity, and saturations and reduced the computational cost significantly. The simplified model can be applied to large samples and plugged into the existing digital rock workflows, to utilize meaningful pore connection information provided from tomograhy.
Hybrid Purity Testing of Brassica rapa Using SSR Marker Technology
Authors: Li Li , Liu Ling , Zhang Deshuang , Wu Ping , Zhang Fenglan , Xu Xiulan
Published: November 2017

Thirteen Chinese cabbage (Brassica rapa) hybrid cultivars and 26 parental inbred lines were used as experimental materials to screen for primers producing hybrid and parental complementary bands and for primers with high polymorphism information contents and low genotype frequencies. A total of 18 pairs of core primers were designed to identify the purity of Chinese cabbage. There was no significant difference in the purity percentage measured between different loci of the same strain. The fingerprint obtained by the amplification of each locus could be used to identify purity to obtain an authentic purity percentage. Curve mapping and significance analyses were conducted using the purity percentage of eight different seed samples and confirmed a sampling seed number of 96. The results of the purity test were verified by comparison with the grow-out test (GOT) using molecular markers. In conclusion, the simple sequence repeat (SSR) detection system could be used for the rapid identification of the purity of the tested Chinese cabbage hybrids.
Growth Response of Herbaceous Ornamentals to Phosphorus Fertilization
Authors: Henry Josh B. , McCall Ingram , Jackson Brian , Whipker Brian E.
Published: November 2017

A series of experiments investigated the effects of increasing phosphate–phosphorus (P) concentrations on the growth and development of four horticultural species. In experiment 1, petunia [Petunia atkinsiana (Sweet) D. Don ex W.H. Baxter] plants were grown using eight P concentrations, and we found that the upper bound for plant growth was at 8.72–9.08 mg·L−1 P, whereas concentrations ≤2.5 mg·L−1 P caused P deficiency symptoms. Experiment 2 investigated P growth response in two cultivars each of New Guinea impatiens (Impatiens hawkeri W. Bull) and vinca [Catharanthus roseus (L.) G. Don]. Growth for these plants was maximized with 6.43–12.42 mg·L−1 P. In experiment 3, ornamental peppers (Capsicum annuum L. ‘Tango Red’) were given an initial concentration of P for 6 weeks and then switched to 0 mg·L−1 P to observe whether plants could be supplied with sufficient levels of P, and finished without P to keep them compact. Plants switched to restricted P began developing P deficiency symptoms within 3 weeks; however, restricting P successfully limited plant growth. These experiments indicated that current P fertilization regimens exceed the P requirements of these bedding plants, and depending on species, concentrations of 5–15 mg·L−1 P maximize growth.
EDA-BASED ESTIMATION OF VISUAL ATTENTION BY OBSERVATION OF EYE BLINK FREQUENCY
Authors: Sakai Tsugunosuke , Tamaki Harunya , Ota Yosuke , Egusa Ryohei , Imagaki Shigenori , Kusunoki Fusako , Sugimoto Masanori , Mizoguchi Hiroshi
Published: November 2017

This paper describes the relationship between visual attention and eye blink frequency. In an experiment, we prompted the activation of a subject’s visual attention and examined the influence of visual attention (as measured using electrodermal activity (EDA), which is meaningfully correlated with visual attention) on the subject’s eye blink frequency. Experimental results show that engagement of visual attention decreased eye blink frequency and that when visual attention was not activated, eye blink frequency increased. Knowledge of this relationship provides a technique using EDA to objectively determining a subject’s visual attention status.
SMART SENSING SYSTEM FOR ENHANCEING THE RELIABILITY OF POWER ELECTRONIC DEVICES USED IN WIND TURBINES
Authors: Teay S. H. , Batunlu C. , Albarbar A.
Published: November 2017

Reliability of modern power systems, in particular those use wind and solar energies, is affected by the relatively short lifetime of the associated power electronic converters (PECs). Thermal stress has been identified as one of the commonest causes for failures in PECs. However, existing thermal monitoring systems are expensive, bulky and with no intelligent capabilities, which limit their full acceptance as monitoring and control tools in operational power plants. This work presents autonomous and inexpensive microcontroller-based system for monitoring and predicting thermal behaviour of switching devices used in PECs. System’s inputs are non-intrusively measured voltages and currents drawn by those devices while in operation. The developed system also determines lifetime consumption and has the ability to communicate with external monitoring and control systems e.g. supervisory, control and data acquisition (SCADA) platforms. The performance of the developed system was critically assessed and compared with high-resolution thermal imaging camera. Good agreement between both systems was achieved and the inexpensive developed system was found to have an accuracy of 95%.
INITIAL ALIGNMENT OF FIBER-OPTIC INERTIAL NAVIGATION SYSTEM WITH LARGE MISALIGNMENT ANGLES BASED ON GENERALIZED PROPORTIONAL-INTEGRAL-DERIVATIVE FILTER
Authors: Ali Rahgoshay Mohammad , Karimaghaie Paknoosh , Shabaninia Fereidoon
Published: November 2017

Initial alignment in the presence of large misalignment angles is a critical issue in strapdown inertial navigation systems. The large initial misalignment angle adversely affects the accuracy and rapidness of the alignment process. In this paper a novel robust alignment approach is proposed based on a generalized proportional-integral-derivative filter. The proposed alignment approach has some significant advantages compared to the standard Kalman filter based alignment method. This method increases the accuracy and the convergence speed of the alignment process in the large misalignment angles problem. Experimental results also, verify the prominent performance of the presented approach in comparison to conventional standard Kalman filter based alignment method.
HARDWARE IMPLEMENTATION OF METHODOLOGIES OF FIXED POINT DIVISION ALGORITHMS
Authors: Kumar D. , Saha P. , Dandapat A.
Published: November 2017

This paper describes the hardware implementation methodologies of fixed point binary division algorithms. The implementations have been extended for the execution of the reciprocal of the binary numbers. Radix-2 (binary) implementations of digit recurrence and multiplicative based methods have been considered for comparison. Functionality of the algorithms have been verified in Verilog hardware description language (HDL) and synthesized in Xilinx ISE 8.2i targeting the device xc4vlx15-12sf363 of Virtex4 family. Implementation was done for both signed and unsigned number systems, having bit width of operands vary as an exponential function of 2n, where n=2 to 5. Performance parameters have been calculated in terms of clock frequency, FPGA slice utilization, latency and power consumption. Implementation results indicate that multiplicative based algorithm is superior in terms of latency, while digit recurrence algorithms are consuming low power along-with less area overhead.
IDENTIFICATION OF TWO TYPES OF ROTTEN MEAT USING AN ELECTRONIC NOSE FOR FOOD QUALITY CONTROL
Authors: Benabdellah Nihad , Hachami Khalid , Bourhaleb Mohammed , Benazzi Naima
Published: November 2017

Microorganisms are contained in all foods, some of them don’t pose a risk for consumers, but many others became pathogenic, because of bad conservation or expired dates. Food will be degraded when the number of microorganisms became very large. The focus in this paper will be on the design of an electronic nose used in detecting rotten food. This nose is applied to detect bad odor diffused by rotten beef, and rotten chicken those meat have almost the same odor at rottenness which is not easily identified by human. Durations and gases emit of its rotten are determined by the pattern recognition methods PCA (Principal Components Analysis) for classification and DFA (Discriminate factorial analysis) for dating, and we will be identify between those rotten meat by DFA method.
Design and Implementation of Dual-Band Circularly Polarized Antennas Using Stacked Patches
Authors: Sankaranarayanan S , Anto Bennet M , Deepa B. , Banu A. , Gayathri S.
Published: November 2017

Single and Dual feed Antennas with dual frequencies have been demonstrated. Varactor diodes are used for independent tuning. The PIFA (Planar Inverted F-Antenna) has two frequencies from 0.7 to 1.1 GHz and from 1.7 to 2.3GHz. Impedance match of about -10dB an isolation greater than 13dB is obtained. The single feed antenna can be tuned from 1.2 to 1.6GHz and 1.6 to 2.3 GHz. The antenna volumes are 63x100x3.15 mm3 with relative permittivity is 3.55 substrates. The efficiency varies from 25% to 50% over tuning range. The application areas are in 4G wireless systems.
Wireless Zigbee Network Cluster - Capacity Calculation and Secure Data Conveyance Using Indegree
Authors: Elankavi R. , Kalaiprasath R. , Udayakumar R.
Published: November 2017

A tree topology is used to construct to construct a Zigbee networks practices by wireless sensor network for data delivery applications. There are 3 types of nodes in zigbee networks; coordinator, router and mobile end devices. Coordinator performs the initialization and maintenance functions in the network. A router is responsible for routing data between the coordinator and mobile end device. In-order to avoid the delivery failures occurs due to node movements and network topology changes, the existing system collect and analyze data about device movement and gives Zigbee node deployment and tree construction framework, which uses three algorithms ZND(zigbee node deployment), ZCD(zigbee coordinator decision) and ZTC(zigbee tree construction). In the proposed system we improve the data delivery by introducing the capacity calculation. If any two nodes have same number of indegree or out-degree, we select the node with maximum capacity.
A Lifi Based Data Transmission for Anti Collision System
Authors: Lokesh S , Priya N , Divyakanni K , Karthika S
Published: November 2017

A new way of data transmission between two vehicles using light fidelity technology is proposed in this paper. A best way of avoiding accidents can be achieved by the communication between the vehicles. This system can be simplified by using LED bulbs for data transmission. The previously used data transmission technology can be overcome by the newly proposed LIFI technology. The major objective of this system is to achieve reliable communication between the vehicle using a transmitter and a receiver. The communication methods and the operations are presented in detail.
Secure Route Discovery for Dynamic Source Routing in Manets
Authors: Anto Bennet M. , Vijayalakshmi G. , Shenbagavalli P. , Vijayalakshmi M. , Saranya S.
Published: November 2017

Mobile ad hoc networks (MANETs) are collections of wireless mobile devices with restricted broadcast range and resources and no fixed infrastructure. Communication is achieved by communicating data along suitable routes that are dynamically discovered and maintained through association between the nodes. Discovery of such routes is a major task both from good organization and security points of view. Recently a security model tailored to the specific requirements of MANETs. A novel route discovery algorithm called endairA is also proposed together with a claimed security proof within the same model. In this paper we show the security proof for the route discovery algorithm endairA is malfunctioning and moreover this algorithm is vulnerable to a hidden channel attack. We also analyze the security framework that is used for route discovery and argue the compos ability is an essential feature for ubiquitous applications. We conclude by discussing some of the major security challenges for route discovery in MANETs.
Patrol Inspection and Time Study to Improve Quality
Authors: Vijayan R. , Karthikeyan P. , Bharanichandar J. , Palanisamy R. , Thanka Geetha T.
Published: November 2017

This project is concerned to analyze and increase the efficiency of patrol inspection and thus reduces time consumption for inspection. Inspection is the process of checking whether the specification of the product meet the standard specification provided by the customer. Inspector takes more time for checking the parameter that meet the specification at all time than Checking the parameters that does not satisfy the customer specification which leads to rejection .Thus the inspector should inspect the parameter that increase the rejection or rework with more attention .on the whole this concept helps the inspector to improve the quality of the product by inspecting more components according to the frequency of the component.
Unmanned Fire Extinguisher Using Quadcopter
Authors: Manimaraboopathy M. , Vivin Christopher H. S. , Vignesh S. , Tamil selvan P.
Published: November 2017

Quadcopters are unmanned Ariel Vehicle (UAV), generally small helicopter that is lifted and propelled by four rotors. Initially they were used as toys, later they gained importance and recent research on multi-copters have received growing attention for military, agriculture, photography, surveillance, news, sports, search/rescue missions and much more. The widespread use of unmanned vehicles and its growing applications in various domains can be attributed to their ability to operate in inaccessible areas, thus decreasing the human loss in major accidents, and making access easy to dangerous conditions. We have proposed an idea about how quadcopter can be used for the application of fire detecting and extinguishing. The target of this paper is to explain briefly to prepare a quadcopter so that it could be used for firefighting and can help our society.
Cloud Security and Compliance - A Semantic Approach in End to End Security
Authors: Kalaiprasath R. , Elankavi R. , Udayakumar R.
Published: November 2017

The Cloud services are becoming an essential part of many organizations. Cloud providers have to adhere to security and privacy policies to ensure their users’ data remains confidential and secure. Though there are some ongoing efforts on developing cloud security standards, most cloud providers are implementing a mishmash of security and privacy controls. This has led to confusion among cloud consumers as to what security measures they should expect from the cloud services, and whether these measures would comply with their security and compliance requirements. We have conducted a comprehensive study to review the potential threats faced by cloud consumers and have determined the compliance models and security controls that should be in place to manage the risk. Based on this study, we have developed an ontology describing the cloud security controls, threats and compliances. We have also developed an application that classifies the security threats faced by cloud users and automatically determines the high level security and compliance policy controls that have to be activated for each threat. The application also displays existing cloud providers that support these security policies. Cloud consumers can use our system to formulate their security policies and find compliant providers even if they are not familiar with the underlying technology.
A New Approach for Cloud Data Security: From Single to Cloud-of-Clouds
Authors: Kalaiprasath R. , Elankavi R. , Udayakumar R.
Published: November 2017

In the corporate world, a large number of people store their data on clouds. For doing this they need to give their confidential data in the hands of the third party, commonly known as service providers. These cloud service providers cannot be trusted since the complete data is stored in one single cloud. This increases security risks to the user’s sensitive data. Due to this issue of data integrity risk and service availability failure, the concept of “Cloud-of-Clouds” comes into picture. Cloud-of-clouds are also known as “inter-clouds” or “multi-clouds”. Use of cloud-of-clouds provides a higher level of security to the user’s confidential data. The aim of this paper is to secure the user’s data by using cloud-of clouds.
Recent Research in Network Security
Authors: Rajesh M. , Wu Wanqing
Published: November 2017

Network security and Data analytics is an important to present society where information technology and services pass through each facet of our lives. However, it is demanding to achieve, as technology is changing at rapid speed and our systems turn into ever more complex. We are gradually more dependent upon such information and communications infrastructures, and the threats we face are organized and exploit our dependency by the attackers or cyber criminals. Moreover, cyber space is considered as fifth battlefield after land, air, water and space. The focal objective of the Special Issue on “Recent research in network security” is to provide insight mechanisms while handling data; provide conceptual understanding of network security issues, challenges and mechanisms; develop basic skills of secure network architecture and explain the theory behind the security of networks, analytics and different cryptographic algorithms. It is to present the most recent challenges and developments in data analytics and networks. It also provides a forum for researchers, practitioners and educators to present and discuss the most recent innovations, trends, and concerns, practical challenges encountered and the solutions adopted in these fields.
Sensor Technology at Submillimeter Wavelengths for Space Applications
Authors: Chattopadhyay Goutam
Published: November 2017

Our universe is most luminous at far-infrared and submillimeter wavelengths (100 GHz – 10 THz) after the Cosmic Microwave Background (CMB) radiation. This region of the electromagnetic spectrum provides critical tracers for the study of a wide range of astrophysical and planetary phenomena. This spectral range contains information on the origin of the planets, stars, galaxies, and clusters; the geometry and matter/energy content of the Universe, atmospheric constituents and dynamics of the planets and comets and tracers for global monitoring and the ultimate health of the Earth. Sensors at far-infrared and submillimeter wavelengths provide unprecedented sensitivity for astrophysical, planetary, and earth observing instruments. Very often, for a spaced based platform where the instruments are not limited by atmospheric losses and absorption, the overall instrument sensitivity is dictated by the sensitivity of the sensors themselves. Moreover, some of the cryogenic sensors at submillimeter wavelengths provide almost quantum-limited sensitivity. This paper provides an overview of the submillimeter-wave sensors and their performance and capabilities for space applications.