bluuebunny/crossref_metadata_2025 huggingface dataset:
Classification of Encryption Algorithms using Fisher’s Discriminant Analysis
Authors: Ray Prabhat Kumar , Ojha Shrikant , Roy Bimal Kumar , Basu Ayanendranath
Published: December 2016

Fisher’s Discriminant Analysis (FDA) is a method used in statistics and machine learning which can often lead to good classification between several populations by maximizing the separation between the populations. We will present some applications of FDA that discriminate between cipher texts in terms of a finite set of encryption algorithms. Specifically, we use ten algorithms, five each of stream and block cipher types. Our results display good classification with some of the features. In the present case we have little in terms of an existing standard; however, our limited study clearly shows that further exploration of this issue could be worthwhile.
A Singular Perturbation Based Midcourse Guidance Law for Realistic Air-to-Air Engagement
Authors: Manickavasagam M , Sarkar A.K. , Vaithiyanathan V
Published: December 2016

In this study, a singular perturbation based technique is used for synthesis and analysis of a near optimal midcourse guidance law for realistic air-to-air engagement. After designing the proposed midcourse guidance law using three dimensional point mass formulation it has been validated through detailed realistic six degrees of freedom simulation. During terminal phase only proportional navigation guidance have been used. The calculation of optimal altitude in present guidance law has been carried out using Newton’s method, which needs generally one iteration for convergence and suitable for real-time implementation. Extended Kalman filter based estimator has been used for obtaining evader kinetic information from both radar and seeker noisy measurements available during midcourse and terminal guidance. The data link look angle constraint due to hardware limitation which affects the performance of midcourse guidance has also been incorporated in guidance law design. Robustness of complete simulation has been carried out through Monte Carlo studies. Extension of launch boundary due to singular perturbation over proportional navigation guidance at a given altitude for a typical engagement has also been reported.
Investigation of Stick Propellant Internal Perforation Erosive Burning on Interior Ballistics Performances
Authors: Zhao Xiaoliang , Zhang Xiaobing
Published: December 2016

In this study, a thorough investigation of a stick propellant internal perforation erosive burning on interior ballistic performances is presented via extending the previous work of author. The stick propellant combustion process and the internal perforation erosive burning are revealed by numerical simulations. Different factors with respect to the stick propellant, including propellant length, internal perforation diameter and loading density are analysed in detail. Stick propellant length and the internal perforation diameter have a significant influence on the ballistic performance, the longer and smaller internal propellant have a greater erosive burning effect to the ballistic performance. Loading density has very weak influence on the ballistic.
Automatic Intruder Combat System: A way to Smart Border Surveillance
Authors: Singh Dushyant Kumar , Kushwaha Dharmender Singh
Published: December 2016

Security and safeguard of international borders have always been a dominant issue for every nation. A large part of a nation’s budget is provided to its defense system. Besides wars, illegal intrusion in terms of terrorism is a critical matter that causes severe harm to nation’s property. In India’s perspective, border patrolling by Border Security Forces (BSF) has already been practiced from a long time for surveillance. The patrolling parties are equipped with high-end surveillance equipments but yet an alternative to the ply of huge manpower and that too in harsh environmental conditions hasn’t been in existence. An automatic mechanism for smart surveillance and combat is proposed in this paper as a solution to the above-discussed problems. Smart surveillance requires automatic intrusion detection in the surveillance video, which is achieved by using optical flow information as motion features for intruder/human in the scene. The use of optical flow in the proposed smart surveillance makes it robust and more accurate. Use of a simple horizontal feature for fence detection makes system simple and faster to work in real-time. System is also designed to respond against the activities of intruders, of which auto combat is one kind of response.
Comparative analysis of electrical and hot water actuation of shape memory alloy spring using thermo-mechanical cycle test bench
Authors: Nath Tameshwar , Chouhan Priya , Disawal Reena , Palani I.A.
Published: December 2016

The optimal design and analysis of hot water actuated shape memory alloy spring is presented. Smart materials exhibit special properties that make them a preferred choice for industrial applications in many branches of engineering. The serviceable properties of a Ni-Ti piece can be improved by altering the energy source. With hot water actuation, as the temperature reaches 70 °C - 90 °C, spring gets fully compressed for the first few cycles followed by loss in actuation. The actuation loss is then studied with different characterisation methods such as thermo gravimetric analysis (TGA) and scanning electron microscopy (SEM). With SEM results, it can be strongly recommended that the energy source is sufficient for actuation (not affecting too much the structure). Results observed from TGA shows high oxygen content at lower temperature, suggest the need of conducting experiments in inert atmosphere. For the validation of hot water actuation, comparative analysis between electrical and hot water actuation is done. Graph shows that, there is a good agreement between both the methods. In addition to this, the application of hot water actuation is some micro-devices like micro-valve, drug delivery, directional control valve, also in engine in place of thermostat valve etc.
Application of a Winch-type Towed Acoustic Sensor to a Wave-powered Unmanned Surface Vehicle
Authors: Moh Taejun , Jang Namdo , Jang Seok , Cho Jin Hyung
Published: December 2016

Although many countries have focused on anti-submarine warfare for several decades, underwater submarines can hardly be detected by current assets such as patrol aircraft, surface ships and fixed underwater surveillance systems. Due to the difficult conditions of the oceanic environment and the relative quietness of submarines, existing acoustic surveillance platforms are not able to fully cover their mission areas. To fill in the gaps, a winch-type towed acoustic sensor system was developed and integrated into a wave-powered unmanned surface vehicle by the Korea Institute of Ocean Science and Technology. In June 2015, sea trial tests were conducted to verify maneuvering, acoustic signal detection, and communication capabilities. During the maneuvering test, the wave-powered glider successfully moved along programmed waypoints. Despite towing the acoustic sensor system, only 20% of initial electricity was consumed in 20 days. The acoustic sensor was lowered to depths of 100–150 m by the winch system, and received signals from an acoustic simulator lowered to depths of 50–100 m by RV Jangmok. Simulated submarine noises that were refracted downward could be clearly received and classified by the hydrophone system, from distances of 2–8 km, while it was being towed silently and deeply. In addition, an optical camera provided high-resolution images of surface vessels, allowing integration with acoustic detection of underwater objects. In conclusion, this new platform using a deeply towed hydrophone system is worthy of consideration as an underwater surveillance asset. Future work is required to strengthen inter-asset communication and obstacle avoidance, and to overcome strong currents to make this technology a reliable part of the underwater surveillance network.
Design and Development of Power Management System of Unmanned Underwater Platform for Defence Application
Authors: Kumar Arun , Anjaneyulu L.
Published: December 2016

Development of underwater weapon systems for defence application are carried out on unmanned underwater platform. Extensive testing and measurement of physical parameters are carried out during development phase trials. After several trials, system is qualified and installed on the actual platform. Mostly battery bank is used to power the unmanned platform. Design and development of power management system is an important issue of underwater platform to increase the underwater time of the platform. During development trials some additional equipments are also included for which power requirement was not considered during design of battery bank. This also becomes an issue to manage the power requirement of additional equipment beyond the design capability of the battery bank. Unmanned submersible platforms at a depth of 50 m to 70 m are used during development of underwater missile. Platform houses the missile to be tested, equipment required for missile launch and control of the platform. A power management system (PMS) with redundancy and fault tolerant features achieving reliability figure of 99 per cent has been designed, developed and tested successfully for underwater phase of missile launch. The system allows remote operation of individual or group of equipment, current monitoring, and isolation of faulty equipment. Power requirement for additional equipment on platform is also included in PMS without affecting the reliability of the system. Power control of equipment on requirement basis to save battery power, to increase underwater time of platform and to manage additional power requirement beyond the designed capacity of the battery bank is described in detail.
Evaluation of 976 nm Multimode Single Emitter Laser Diodes for Efficient Pumping of 100 W+ Yb-doped Fiber Laser
Authors: Sharma Rishi Kant , Wadhwa Shammi , Verma N.K. , Reddy M.N. , Rana H
Published: December 2016

Experimental evaluation of spectral and power-current (P-I) characteristics of fiber coupled single emitter multimode laser diodes used for development of efficient pumping assembly is reported. Fiber coupled laser diodes emitting around 976 nm are best suited for pumping Yb-doped fiber lasers because of excellent coupling efficiency and reduced thermal load. We have experimentally investigated emission spectrum of fiber coupled multimode laser diodes at different temperatures and drive currents. It is found that peak emission wavelength shifts towards the longer wavelength with increase in temperature and drive current. P-I characteristics of fiber coupled laser diodes have been obtained and presented for drive current from 0.4 A to 11.5 A. Based on experiment, we have constructed spectrally matched laser diode assembly for efficient pumping of 100 W fiber laser. It requires very precise control of temperature and drive current to maintain the emission spectrum. Total 162 W power is pumped in to the Yb-doped fiber laser cavity through multi-mode pump combiners and we have obtained 110 W fiber laser output power @1070 nm. The achieved optical-to-optical efficiency is 68 per cent.
Parameter Estimation from Near Stall Flight Data using Conventional and Neural-based Methods
Authors: Saderla S. , Dhayalan R. , Ghosh A.K.
Published: December 2016

The current research paper is an endeavour to estimate the parameters from near stall flight data of manned and unmanned research flight vehicles using conventional and neural based methods. For an aircraft undergoing stall, the aerodynamic model at these high angles of attack becomes non linear due to the influence of unsteady, transient and flow separation phenomena. In order to address these issues the Kirchhoff’s flow separation theory was used to incorporate the nonlinearity in the aerodynamic model in terms of flow separation point and stall characteristic parameters. The classical Maximum Likelihood (MLE) method and Neural Gauss-Newton (NGN) method have been employed to estimate the nonlinear parameters of two manned and one unmanned research aircrafts. The estimated static stall parameter and the break point, for the flight vehicles under consideration, were observed to be consistent from both the methods. Moreover the efficacy of the methods is also evident from the consistent estimates of post stall hysteresis time constant. It can also be inferred that the considered quasi steady model is able to adequately capture the drag and pitching moment coefficients in the post stall regime. The confidence in these estimates have been significantly enhanced with the observed lower values of Cramer-Rao bounds. Further the estimated nonlinear parameters were validated by performing a proof of match exercise for the considered flight vehicles. Interestingly the NGN method, which doesn’t involve solving equations of motion, was able to perform on a par with the MLE method.
Development of Pocket‐sized Hand‐held Ultrasound Devices Enhancing People's Abilities and Need for Education on Them
Authors: Kobayashi Tadashi , Kato Hiroyuki
Published: December 2016

Today, ultrasound devices (US) for medical and healthcare uses are undergoing a revolutionary transition from conventional cart‐based US to pocket‐sized hand‐held US (phUS) in terms of size, performance, cost, and portability. Each type has its best area of application. For example, while cart‐based US is essential for elaborate and precise diagnoses in laboratories, phUS is ideal for quick point‐of‐care applications and data‐sharing via a network inside and outside medical institutions because it is handy, portable, and networking. The remarkable progress in electronics technologies has indeed made these devices ever smaller, smarter, and more affordable, leading to their growing proliferation in Japan. As we believe this irreversible trend will quickly spread into other parts of the world, we feel a pressing need to establish an education system, rules, and guidelines for governing US (especially phUS), first domestically and then globally.
The Effect of Respiratory Rehabilitation for the Frail Elderly: a Pilot Study
Authors: Maki Naoki , Takahashi Hirotomo , Nakata Toshiaki , Wakayama Shuichi , Hasegawa Daigo , Sakamoto Harumi , Fujita Yoshihiko , Takata Yu , Sukada Takeshi , Sato Yukio , Yanagi Hisako
Published: December 2016

Objective: To analyze the effects of respiratory rehabilitation on the activities of daily living (ADL) and quality of life (QOL) in community‐dwelling frail elderly.

Design: Pilot intervention study after a one‐year period of observation.

Setting: Day care facility in a rehabilitation hospital.

Subjects: Thirty community‐dwelling frail elderly using rehabilitation services

Intervention: After a one‐year observation period of usual rehabilitation, 30 participants were given 12 rehabilitation sessions that included respiratory rehabilitation (three sessions a week for four weeks).

Main Measures: The measurement was performed approximately one year before the 12 rehabilitation sessions (initial evaluation), prior to training (pre‐training evaluation), and after the sessions (post‐training evaluation). Primary outcome measures included: respiratory function, swallowing function, ADL, and QOL. Secondary outcome measures included: depressive score, exercise tolerance, 6‐minute walk distance, thorax flexibility, and muscle strength (knee extension, grip, and abdominal). QOL were estimated using questionnaires.

Results: Swallowing function, ADL, QOL (SF8 physical and mental summary score), respiratory function, and physical function were significantly reduced during usual rehabilitation (between the initial evaluation and pre‐training evaluation), whereas swallowing function, ADL, QOL (SF8 physical component summary score [PCS]), respiratory function, exercise tolerance, 6‐minute walk distance, thorax flexibility, and muscle strength (knee extension) were significantly improved during respiratory rehabilitation (between the pre‐training evaluation and post‐training evaluation).

Conclusions: Our results suggest that a usual rehabilitation program without respiratory training is not sufficient for the frail elderly to maintain their ADL and QOL, and furthermore that respiratory rehabilitation can help improve their ADL and QOL as well as their swallowing and respiratory function.
Analysis of Associations between Health Literacy and Healthy Lifestyle Characteristics among Japanese Outpatients with Lifestyle‐related Disorders
Authors: Kudo Nagako , Yokokawa Hirohide , Fukuda Hiroshi , Hisaoka Teruhiko , Isonuma Hiroshi , Naito Toshio
Published: December 2016

Background: The skills of individuals to find and apply adequate information needed to make health decisions have been conceptualized as health literacy (HL). However, limited studies have examined the association between HL and healthy lifestyle characteristics among patients with lifestyle related disorders.

Methods: This cross‐sectional study examined associations between HL and healthy lifestyle characteristics among Japanese outpatients with lifestyle related disorders. Participants were 207 men and 254 women who visited Tokorozawa Medical Clinic in Tokorozawa City, Japan, from April to May 2015. Information on five items for functional HL, five items for communicative HL, and four items for critical HL, and healthy lifestyle characteristics was collected by self‐administered questionnaires.

Results: Mean age was 68.1 years among men, and 70.3 years among women. In multivariate logistic analysis, a higher HL was significantly associated with having 6–7 healthy lifestyle characteristics among men [Odds ratio (OR) = 2.19, 95% Confidence interval (CI) = 1.09–4.41]. Moreover, functional, communicative, and critical HLs were significantly associated with having 6–7 healthy lifestyle characteristics among men [(OR = 2.34, 95% CI = 1.09–5.02), (OR = 2.37, 95% CI = 1.15–4.88), (OR = 2.78, 95% CI = 1.36–5.70)]. No association was observed between total HL score and healthy lifestyle characteristics among women.

Conclusion: Our study revealed a positive association between HL and healthy lifestyle characteristics among male outpatients with lifestyle related disorders, suggesting that men, but not women, are likely to engage in health‐promoting behaviors based on several aspects of HL. Further studies will be needed to confirm this gender discrepancy.
Renal Infarction in a Patient with Hyperhomocysteinemia
Authors: Tsukui Takunori , Nakamura Tomohiro , Ishida Takeshi , Momomura Shin‐ichi
Published: December 2016

A 62‐year‐old man was referred to our hospital due to acute‐onset severe left lumbar pain. Computed tomography of the abdomen revealed a nonenhancing area in the left kidney with renal artery occlusion. Hyperhomocysteinemia, which is known as a risk factor of cardiovascular and thrombotic diseases, was also diagnosed. We performed percutaneous transluminal renal intervention using an aspiration catheter, and started the replacement therapy for folic acid and vitamin B deficiencies in addition to anticoagulant therapy. With improvement of blood perfusion in the left kidney, the patient was discharged after 15 days. In this patient with renal infarction, hyperhomocysteinemia may have been responsible.
Del lenguaje hacia la pedagogía de la lengua en la formación del sujeto social
Authors: Quitián Bernal Sandra Patricia
Published: December 2016

El lenguaje se constituye en un hecho social que dinamiza y permea toda la actividad de los seres humanos, pues solo es posible reconocernos como sujetos en y para el lenguaje. Este “tiene origen social y precede al pensamiento racional e influye en la naturaleza del mismo” (Vygotsky, 1995, p. 99). Este planteamiento nos conduce a señalar el lenguaje como la principal mediación entre el individuo y el mundo, ya que asegura la participación de este en los procesos históricos y sociales, además de ser fundamental en la construcción del conocimiento.
Constitución de sujeto maestro en prácticas de resistencia en Colombia
Authors: Mendez Rivera Pilar
Published: December 2016

Este artículo comparte los resultados de una investigación que analizó la constitución de sujeto maestro en las prácticas de resistencia en Colombia en el periodo comprendido entre 1930 y 2013 para dar cuenta de los cambios en sus prácticas frente al reclamo de un estatus profesional de la docencia. Se identifican y describen los modos como las prácticas de resistencia han contribuido a la constitución de sujeto maestro en Colombia, con el propósito de situar la participación del movimiento magisterial en las distintas formas que han definido o connotado la condición de maestro en Colombia. En cuanto estudio arqueológico (Foucault, 1969), la mirada al pasado para comprender el presente permitió entender los modos en que la forma maestro ha sido intervenida por distintas fuerzas. El archivo de la resistencia que se construyó en esta investigación organizó temáticamente enunciados provenientes de distintas fuentes documentales (revistas sindicales, revistas académicas, prensa, leyes, decretos, etc.) y los sometió a los procesos de eventualización, líneas de fuerza, condiciones de posibilidad, desmultiplicación causal, polimorfismo creciente y puntos en suspenso. Los resultados de esta investigación identifican tres trayectos importantes de las prácticas de resistencia y del sujeto que se constituye en ellas: el primero ligado a la lucha gremial reivindicativa, el segundo referido a las luchas de sí y un tercer trayecto de disputas por la distinción de sí mismo en la función docente.
Análisis crítico del discurso: un discurso ecológico que integra el componente social
Authors: Guerrero Cabrera Sonia Amparo
Published: December 2016

El proyecto de investigación –finalizado– denominado “Reconstrucción analítica de un discurso ecológico (RADE)”, tuvo como objetivo central el reconocimiento de la realidad ecológica de Colombia, en cuanto muchas de sus dimensiones y componentes permanecen desconocidos para la población de Colombia. De esta manera se recurrió a las publicaciones que en el diario La República hizo la directora del Instituto de Investigación de Recursos Biológicos Alexander von Humboldt –es decir, una experta en el tema–, durante el periodo 2013-2014, se trata de 43 artículos en total. Esta investigación aborda la problemática ambiental desde un enfoque poco usual: el análisis del discurso, cuyos postulados centrales, enunciados por Van Dijk, se aplican en cuanto al nivel semántico y pragmático. Por efectos metodológicos, en este artículo se da cuenta de los hallazgos a nivel semántico, donde tras el análisis se evidencia la importancia del componente social en la comprensión de la situación ecológica del país, es decir que uno de los resultados más significativos de esta investigación se orienta a resaltar el papel protagónico de elementos como la cultura, las tradiciones, la lengua, la historia y demás fenómenos sociales a la hora de entender e intervenir en una problemática que involucra a toda la ciudadanía: la gestión ambiental integral.
Corporrelatos del yo docente: el cuerpo tras la práctica pedagógica
Authors: Villalba Labrador Raimundo
Published: December 2016

En este artículo expongo una serie de imágenes, relatos y disertaciones para revelar el cuerpo del docente tras la práctica pedagógica. El abordaje implica reconocer la experiencia corporal de quienes somos considerados sujetos de saber y la incidencia que tiene sobre nuestros cuerpos en el territorio escolar. Para este propósito, compartiré los resultados de una experiencia de investigación-creación sobre mi condición corporal como docente en una institución educativa distrital (IED), a partir del reconocimiento de marcas que la experiencia ha dejado en mi cuerpo y el corporrelato como ruta metodológica de indagación y creación a partir de la escritura desde el cuerpo.
Sexo y vocabulario: relación en escolares habaneros
Authors: Cuba Vega Lidia Ester
Published: December 2016

Es común escuchar, aun a maestros y profesores experimentados en la enseñanza de lenguas, que las niñas tienen un vocabulario más amplio que los niños. Sin embargo, la mayoría de esas afirmaciones no están avaladas por resultados de investigaciones científicas, sino por el ejercicio de la práctica pedagógica cotidiana. Este trabajo tiene la finalidad de comprobar la veracidad de los criterios acerca de mayores índices de vocabulario en las niñas que en los niños, a partir de la aplicación de pruebas de riqueza léxica, y análisis estadísticos de la significación de los resultados obtenidos (las pruebas estadísticas paramétricas de diferencia de proporciones y la prueba T de Student). Para ello, a través de una metodología descriptivo-cuantitativa, propia de estudios léxico-estadísticos, y específica para los análisis de riqueza léxica, se trabajó con dos muestras de textos escritos de escolares de primaria de seis escuelas de La Habana, recogidas en dos momentos diferentes. El estudio presentado corresponde al proyecto de investigación universitario titulado “Proyecto marco sobre enseñanza del léxico”, que desarrolla la Facultad de Español para No Hispanohablantes de la Universidad de La Habana, dirigido por la autora del actual artículo. Los resultados permiten llegar a conclusiones válidas para la muestra analizada.
Un género discursivo mediático: el defensor del televidente
Authors: Barragán Escarpeta Víctor Alfonso
Published: December 2016

En este artículo se exponen los avances de la investigación en curso, que tiene como objeto caracterizar el género discursivo mediático a partir de los programas del “defensor del televidente”, para evidenciar con ello cómo categorías propias del análisis de los géneros discursivos permiten describir el funcionamiento de prácticas discursivas, en este caso mediática. Esta investigación parte de las ideas de Bajtin (1982), Carranza (2012) así como de la perspectiva sociocomunicativa de Charaudeau (2012) sobre los géneros, ya que brindan elementos teórico-empíricos para el establecimiento de dicha caracterización, y de igual forma, al ser perspectivas que enfatizan en el componente social de los textos, permiten la comprensión de variantes como las relaciones entre los participantes y la influencia de estas en el discurso. Para ello, con la metodología se plantea el análisis de dos programas de diferentes cadenas de televisión pública, a través de la realización de transcripciones e imágenes, seleccionados a partir del establecimiento de las siguientes categorías: ámbito de práctica social, situación global de comunicación (SGC) y situación específica de comunicación (SEC); también las propiedades discursivas y formales; los marcos flexibles y el sujeto agente. De esta manera, se realiza un ejercicio teórico-práctico de índole inductiva que rescata cómo las categorías de la situación comunicativa y el análisis de elementos como los soportes permiten mayor profundización de diferentes dimensiones de las prácticas discursivas mediáticas (las relaciones sociales, las temáticas, etc.) así como observar en qué medida hablamos de géneros y subgéneros discursivos en la vida cotidiana.
Lenguaje, interacción y diferencia sexual
Authors: Tusón Valls Amparo
Published: December 2016

Cada vez son más abundantes los estudios que abordan las relaciones entre los usos lingüísticos y las diferencias sexuales. La antropología lingüística, la sociolingüística, la nueva dialectología y lo que en el ámbito anglosajón se denomina la "lingüística feminista" llevan varias décadas aportando datos que muestran cómo hombres y mujeres se construyen y se manifiestan de forma diferente en cuanto a la manera de utilizar las lenguas; asimismo, se están desvelando los usos sexistas de las lenguas y proponiendo formas de uso que permitan nombrar a las mujeres. Los principales ejes que han promovido la investigación en torno de la diversidad lingüística ligada a la diferencia sexual han sido las diferencias en la adquisición lingüística según el sexo; las formas de transmisión cultural y, especialmente, la adquisición y el desarrollo de la competencia comunicativa en niños y niñas, chicos y chicas. En este sentido resulta de gran interés la consulta de los diferentes trabajos que aparecen en la obra coordinada por B. Schieffelin y E. Ochs (1986).* Este artículo apareció en C. Lomas & A, González (coords.) Mujer y educación: educar para la igualdad, educar desde la diferencia. Barcelona: Graó, 2002, pp. 61-76. ISBN 84-7827-268-
La lectura y el aprendizaje de gramática a través de teléfonos móviles
Authors: Wang Shudong , Smith Simon
Published: December 2016

Este artículo describe un proyecto en curso acerca del aprendizaje de idiomas mediante un reporte parcial, tres años después del inicio de su implementación. Aquí se examina tanto la viabilidad como las limitaciones del desarrollo de habilidades de lectura y gramática en inglés a través de la interfaz de los teléfonos móviles. Materiales de lectura y gramática se enviaron regularmente a lo largo del proyecto a los teléfonos móviles de los estudiantes, quienes leyeron o interactuaron de alguna manera con los materiales que les llamaban la atención. La información obtenida de los participantes y los registros del servidor indican que la lectura y el aprendizaje de la gramática, utilizando dispositivos móviles, fueron considerados experiencias positivas del lenguaje. Sin embargo, los datos también indican que el éxito de cualquier proyecto de aprendizaje a través de estos dispositivos podría ser limitado, a menos que se cumplan ciertos criterios, los cuales incluyen: a) proporcionar material de aprendizaje interesante que no sean muy extenso ni demasiado exigente; b) brindar un grado adecuado de acompañamiento; c) incentivar la participación activa de los estudiantes; d) ofrecer incentivos; e) garantizar el respeto a la privacidad, f) crear un entorno de aprendizaje móvil y técnico que sea seguro y protegido.
El experimento del efecto fotoeléctrico para la comprensión del concepto de cuantización de la energía de la radiación
Authors: Berrios Saavedra Yeimy Gerardine , Ramos Bonilla Mayra Alejandra
Published: December 2016

El presente estudio se inscribe en el marco de las investigaciones sobre la enseñanza de la física. La pregunta que lo orientó fue: ¿de qué manera una propuesta de aula, basada en el experimento del efecto fotoeléctrico, ayuda a los aspirantes a profesores de física, de la Universidad Pedagógica Nacional, a ampliar sus comprensiones sobre el concepto de cuantización de la energía de la radiación? La construcción del marco teórico se desarrolló, por una parte, con las ideas científicas sobre la cuantización de la energía y, por otra, con las propuestas pedagógicas de la enseñanza para la comprensión. Esta propuesta pedagógica estuvo guiada por la mirada investigativa de la metodología del estudio basado en diseño, tomando como principal elemento el uso de herramientas de aprendizaje tales como las tareas de predecir, experimentar y explicar (PEE). Se encontró que dichas tareas fortalecieron las comprensiones iniciales de los estudiantes sobre dicho concepto, en tanto que ellos enriquecieron y transformaron de manera progresiva sus modelos e ideas científicas, fomentando aspectos del trabajo científico en el desarrollo de la curiosidad, la imaginación y la motivación.
Análisis estructural de las interacciones en una red social a partir de una actividad pedagógica en la educación superior
Authors: Vásquez Gómez Eva Patricia , Bachiller Sandoval Oscar Javier
Published: December 2016

El objetivo del presente trabajo es presentar la descripción y análisis de las interacciones entre estudiantes participantes en una actividad pedagógica llevada a cabo en un curso de pregrado de educación superior, en el segundo semestre de 2013, en una universidad regional de Colombia (Universidad de Cundinamarca, sede Fusagasugá), utilizando el Análisis de Redes Sociales (ARS) [1]; y, de igual forma, determinar si el comportamiento de los individuos en la red de alguna manera influye en el rendimiento académico individual y grupal. La tutora (coautora de este trabajo) estableció un entorno colaborativo como estrategia de aprendizaje utilizando Facebook, donde la comunidad del curso podía participar aportando y debatiendo sobre el tema de estudio relacionado con la aplicación de metodologías de sistemas suaves (MSS) en la resolución de problemas no estructurados [2].
Modelo metodológico para programación de tareas en sistemas de servicios: un enfoque de ingeniería de software
Authors: Lopez-Santana Eduyn Ramiro , Bolaños Castro Sandro Javier , Mendez Giraldo German Andres
Published: December 2016

Se presenta una estructura de Ingeniería de Software (IS) para un proyecto de investigación relacionada con la construcción de un prototipo de Sistema Experto (SE) para la programación de tareas en sistemas de servicios (PTSS), empleando metodologías y procesos del desarrollo de software. Se utiliza la metodología de desarrollo de software adaptable para el desarrollo de la arquitectura de software, partiendo de la descripción como un metaproceso de software que caracterizará el proceso de la investigación. Se emplean diagramas de UML (Unified Modeling Language) para proporcionar un modelado visual que describe la metodología del trabajo de investigación, que permite establecer los actores, elementos e interacciones en el proceso de investigación.
Módulo de potencia para un picosatélite experimental tipo Cubesat
Authors: Castro Avellaneda Javier , Grajales Henriquez Alfredo , Salamanca Céspedes Jorge Enrique
Published: December 2016

Se describe el Módulo de Potencia para un picosatélite siguiendo el estándar CubeSat [1,2,3,13]. El proyecto del Módulo de Potencia se desarrolla en cuatro fases: estudio, diseño, implementación y pruebas.  En la fase de estudio se revisa el marco teórico y los diseños preliminares hechos en la Universidad Distrital [4,5 y de otros satélites tipo CubeSat desarrollados en el mundo, también investiga tecnologías  y componentes existentes en el mercado y su asequibilidad. La fase de diseño implica el análisis del sistema y la utilización de un programa de diseño computacional para generar el hardware necesario.  El objetivo final es obtener un Módulo de  Potencia funcional que trabaje en las condiciones del entorno espacial en el que el picosatélite cumplirá su misión, que en el caso del picosatélite experimental “CubeSat UD Colombia 1” está enfocada a una aplicación en telemedicina, con una carga útil representada en el sistema de telecomunicaciones.
Plataforma de teleasistencia domiciliaria para el programa de soporte social CASSAUDEC
Authors: Ardila Rodríguez Andrés Felipe , Huérfano Zapata Benjamin Andrés , Pulido Córdoba Marcia Catalina , Cifuentes Guerrero Pedro Luis
Published: December 2016

Las estrategias de formación desarrolladas para el programa de soporte social traen consigo deficiencias en la accesibilidad por parte de los enfermos crónico (EC) como del cuidador de CASSA-UDEC (Centro de Atención Social en Salud de la Universidad de Cundinamarca), que no cuentan con tiempo para desplazarse, obstaculizando su vinculación. Para tal fin se desarrolló una plataforma de teleasistencia domiciliaria (PTD) mejorando la cobertura, calidad, accesibilidad y formación a los cuidadores y EC de CASSA-UDEC. El diseño de la plataforma brinda una interfaz de contenidos dinámicos, modulares y de fácil uso al usuario con base en constructos gerontológicos identificados. Gracias a los beneficios de la virtualidad, la plataforma facilita el autoaprendizaje de sus usuarios y da soporte a las actividades desarrolladas en el programa de soporte social, ampliando su cobertura y accesibilidad.
Post-Earthquake People Loss Evaluation Based on Seismic Multi-Level Hybrid Grid: A Case Study on Yushu Ms 7.1 Earthquake in China
Authors: Yang Xiaohong , Xie Zhong , Ling Feng , Luo Xiangang , Zhong Ming
Published: December 2016

People loss is one of the most important information that the government concerns after an earthquake, because it affects appropriate rescue levels. However, existing evaluation methods often consider an entire stricken region as a whole assessment area but disregard the spatial disparity of influencing factors. As a consequence, results are inaccurately evaluated. In order to address this problem, this paper proposes a post-earthquake evaluation approach of people loss based on the seismic multi-level hybrid grid (SMHG). In SMHG, the whole area is divided into grids at different levels with various sizes. In this manner, the efficiency of data management is improved. With SMHG, disaster statistics can be easily counted under both the administrative unit and per unit area. The proposed approach was then applied to investigate Yushu M
Geometry, kinematics and dynamic characteristics of a compound transfer zone: the Dongying anticline, Bohai Bay Basin, eastern China
Authors: Tian Fei , Yang Jianting , Cheng Ming , Lei Yuhong , Zhang Likuan , Wang Xiaoxue , Liu Xin
Published: December 2016

The Dongying anticline is an E-W striking complex fault-bounded block unit which located in the central Dongying Depression, Bohai Bay Basin. The anticline covers an area of approximately 12 km2. The overlying succession, which is mainly composed of Tertiary strata, is cut by normal faults with opposing dips. In terms of the general structure, the study area is located in a compound transfer zone with major bounding faults to the west (Ying 1 fault) and east (Ying -8 and -31 faults). Using three-dimensional seismic data, wireline log and checkshot data, the geometries and kinematics of faults in the transfer zone were studied, and fault displacements were calculated. The results show that when activity on the Ying 1 fault diminished, displacement was transferred to the Ying -8, Ying -31 and secondary faults so that total displacement increased. Dynamic analysis shows that the stress fields in the transfer zone were complex: the northern portion was a left-lateral extensional shear zone, and the southern portion was a right-lateral extensional shear zone. A model of potential hydrocarbon traps in the Dongying transfer zone was constructed based on the above data combined with the observed reservoir rock distribution and the sealing characteristics of the faults. The hydrocarbons were mainly expulsed from Minfeng Sag during deposition periods of Neogene Guantao and Minghuazhen Formations, and migrated along major faults from source kitchens to reservoirs. The secondary faults acted as barriers, resulting in the formation of fault-bound compartments. The high points of the anticline and well-sealed traps near secondary faults are potential targets. This paper provides a reservoir formation model of the low-order transfer zone and can be applied to the hydrocarbon exploration in transfer zones, especially the complex fault block oilfields in eastern China.
The Influence of Refractance Window Drying on Qualitative Properties of Kiwifruit Slices
Authors: Azizi Dariush , Jafari Seid Mahdi , Mirzaei Habibollah , Dehnad Danial
Published: December 2016

In this research, effect of Refractance Window (RW) drying on the quality properties of the kiwifruit samples was investigated. Drying temperatures of 80–100 °C, slice thickness of 0.8–2.4 mm and Mylar thickness of 100–300 µm were the independent variables and different qualitative attributes including drying duration, textural hardness, colour, rehydration ratio and organoleptic properties were responses monitored in each situation. Drying temperature was the most important factor contributed to quality features of RW dried kiwifruits with significant effects on all properties. Similarly, slice thickness influenced nearly all quality traits except textural hardness and some colour indices. However, Mylar membrane thickness failed to affect about every qualitative property of kiwifruit samples significantly. The majority of organoleptic properties of RW dried kiwifruits, including flavour, colour, texture, shrinkage and overall acceptance, were judged to be in the range of medium to good quality (scores of 3–4) by panellists.
Semi-quotient mappings and spaces
Authors: Khan Moiz ud Din , Noreen Rafaqat , Siddique Bosan Muhammad
Published: December 2016

In this paper, we continue the study of s-topological and irresolute-topological groups. We define semi-quotient mappings which are stronger than semi-continuous mappings, and then consider semi-quotient spaces and groups. It is proved that for some classes of irresolute-topological groups (G, *, τ) the semi-quotient space G/H is regular. Semi-isomorphisms of s-topological groups are also discussed.
Convergence theorems for a family of multivalued nonexpansive mappings in hyperbolic spaces
Authors: Alagoz Osman , Gunduz Birol , Akbulut Sezgin
Published: December 2016

In this article we modify an iteration process to prove strong convergence and Δ— convergence theorems for a finite family of nonexpansive multivalued mappings in hyperbolic spaces. The results presented here extend some existing results in the literature.
Fractional virus epidemic model on financial networks
Authors: Balci Mehmet Ali
Published: December 2016

In this study, we present an epidemic model that characterizes the behavior of a financial network of globally operating stock markets. Since the long time series have a global memory effect, we represent our model by using the fractional calculus. This model operates on a network, where vertices are the stock markets and edges are constructed by the correlation distances. Thereafter, we find an analytical solution to commensurate system and use the well-known differential transform method to obtain the solution of incommensurate system of fractional differential equations. Our findings are confirmed and complemented by the data set of the relevant stock markets between 2006 and 2016. Rather than the hypothetical values, we use the Hurst Exponent of each time series to approximate the fraction size and graph theoretical concepts to obtain the variables.
Trap-Induced Dispersive Transport and Dielectric Loss in PbS Nanoparticle Films
Authors: Chanaewa Alina , Poulsen Katharina , Gräfe Alexander , Gimmler Christoph , von Hauff Elizabeth
Published: December 2016

In this work, we investigate the electrical and dielectric response of lead sulfide (PbS) nanoparticle (NP) films with impedance spectroscopy. In particular, the influence of the ligand passivation on the surface trap state density of PbS NPs is demonstrated by comparing two different types of ligands: ethane-1,2-dithiol (EDT) and 3-sulfanylpropanoic acid (MPA). We observe that the MPA treatment passivates the PbS surface more efficiently than EDT. By analyzing the dielectric loss spectra, we are able to visualize shallow trap states in the bulk of PbS-EDT films and correlate this with the dispersive response observed in the impedance spectra. Evidence of deep trap states is revealed for both PbS-EDT and PbS-MPA diodes. Under illumination, the PbS-MPA and PbS-EDT films demonstrate almost identical trap profiles, showing solely the deep trap state densities. We conclude that the deep traps are related to the stoichiometry of the PbS NPs.
İŞ YERİNDE YALNIZLIĞIN TÜKENMİŞLİK ÜZERİNE ETKİSİ
Authors: Akşit Aşık Nuran
Published: December 2016

Bu araştırmanın amacı, otel çalışanlarının iş yerinde yalnızlık algıları ile tükenmişlik düzeyleri arasındaki ilişkinin incelenmesidir. Araştırmanın evrenini, Balıkesir il merkezinde faaliyet gösteren otellerin çalışanları oluşturmaktadır. Evrenin ulaşılabilir büyüklükte olması nedeniyle, tam sayım tekniği kullanılmış ve evrenin tamamına ulaşılmıştır. Araştırmada veri toplamak için, nicel araştırma yöntemlerinden anket tekniği kullanılmıştır. Anket üç bölümde tasarlanmış olup, birinci bölümde demografik sorular, ikinci bölümde iş yerinde yalnızlık ölçeği, üçüncü bölümde ise tükenmişlik ölçeği yer almaktadır.  Hazırlanan anket formu 143 çalışana uygulanmıştır. Araştırma sonucunda, otel çalışanlarının yalnızlık düzeylerinin orta ve tükenmişlik seviyelerinin yüksek düzeyde olduğu ve yalnızlık ile tükenmişlik arasında orta düzeyde pozitif bir ilişki olduğu belirlenmiştir. Ayrıca iş yerinde yalnızlığın çalışanların tükenmişlik düzeyini arttırdığı tespit edilmiştir. Elde edilen sonuçlar, iş yerinde yalnızlık algısının, duygusal tükenmenin %31,2’sini, duyarsızlaşmanın %24,6’sını, düşük kişisel başarının %12,6’sını açıkladığını ve tükenmişlik boyutlarını en çok etkileyen değişkenin sosyal yalnızlık olduğunu göstermiştir.
Continuing Education and Professional Life Quality of the Nursing Community of Madrid
Authors: Mazuecos F. J.
Published: December 2016

Today's society demands that nurses are as up to date as possible, as advances and changes in relation to health are required to provide consistent quality. This study investigates if the influence of certain variables have some significance on the quality of working life of nurses, and if continuing training exercises significantly influence the quality of life. A descriptive, correlational and cross-sectional study design was used to investigate a sample of nurses in Madrid using a self-administered and anonymous online survey. The professional quality of life questionnaire CVP-35 (Cabezas, 1998), validated for health areas was used. Regarding continuing training, 66.67% were awaiting training, 81.62%were currently undergoing training and 92.59% had training directly connected with their position. A certain quality of life correlated with average dimensions of managerial support and intrinsic motivation. There was no association with perceived workload. The nurses’ perceptions regarding their overall quality of life was relatively good with young nurses with families being satisfied with their professional workload.
Use of Telepresence Equipment for Teachers’ Professional Development
Authors: Ulrich Catalina , Mironov Cosmina , Stingu Mihaela
Published: December 2016

In the framework of the IRIS project, telepresence system is used to provide better educational and study opportunities to students living in geographically isolated areas of the Danube Delta in Romania. The study refocuses teachers’ attention to the quality of interactions as the key issue of facilitating learning, by using video recorded teaching activities. This research is grounded on identifying adults and teenagers’ resistance and openness to adopt new technology. Telepresence is investigated as challenging context for teachers’ professional development by switching the primary focus from virtual environments back to traditional educational settings. Using videography data as input and a motivational driver, researchers involve teachers into an action research collaborative effort, focusing on interactions as a catalyst of quality teaching. This paper presents the design of a teacher training program that extensively uses videography materials as a platform for understanding social interactions in the classroom, as part of the learning process. The program’s design embodies the “triple A model”, bringing both teachers and students into the process of awareness, acknowledgement and accomplishment of their experiences in classroom.