bluuebunny/crossref_metadata_2025 huggingface dataset:
CALCULATION OF POLYNOMIAL RATIO APPROXIMATED SURFACES OF BIFOCAL LENS
Authors: Nikulina Yu. S. , Nikulin A. V. , Stepanov M. A.
Published: May 2019

General imperfection of existent synthesis methods of bifocal lens surface is use complexity emerging over lack of analytical solution. Method of successive approximations is relatively simple, its main problem is determination of power polynomial coefficient approximating illuminated and shadow surface of being synthesized lens. To solve this problem it is suggest analytical determination method of polynomial coefficient approximating illuminated and shadow surface of bifocal lens. This method based on equality condition of electric path length of edge beam and beam passing through lens center. It is obtained analytical equation which permit to determine interdependence polynomials coefficients approximating illuminated and shadow surface of bifocal lens. Moreover, been finded equation allow to calculate bifocal lens thickness, that impossible using known methods of synthesis methods of bifocal lens surface. Cross-section of bifocal lens was be calculated with being suggested analytical method.
USING ACCUMULATION AND SIMPLE VOTING METHOD FOR RECOGNIZING CLASSES OF TARGETS BASED ON JOINT DISTRIBUTION OF PAIRS OF ECHO SIGNALS AMPLITUDES
Authors: Martynov D. O. , Kalin A. V.
Published: May 2019

With the development of the defense industry and aviation, there is an increasing number of different air targets. In this regard, the detection and identification of the type of target is currently a actual problem. The algorithm for recognizing object classes based on a two-dimensional probability distribution density of the correlating amplitudes is known from the recently written works. In this paper the methods of increasing the probability of correct radar target classes recognition are considered. The methods are applied with regard to recognition algorithm, which makes a decision based on two attributes (effective radar cross-section and correlation coefficient of the received echo amplitudes samples).The averaging and the simple voting methods were used for increasing the recognition reliability. In this paper is considered evaluation of efficiency of proposed methods. The results of numerical simulation showed that both methods provide the significant gain.
NOISE AND TARGET SIGNALS SIMULATION IN PASSIVE SEISMIC LOCATION SYSTEMS
Authors: Morozov Yu. V. , Rajfeld M. A. , Spektor A. A.
Published: May 2019

The paper proposes the model of a person seismic signal with noise for the investigation of passive seismic location system characteristics. The known models based on Gabor and Berlage pulses have been analyzed. These models are not able wholly to consider statistical properties of seismic signals. The proposed model is based on almost cyclic character of seismic signals, Gauss character of fluctuations inside a pulse, random amplitude change from pulse to pulse and relatively small fluctuation of separate pulses positions. The simulation procedure consists of passing the white noise through a linear generating filter with characteristics formed by real steps of a person, and the primary pulse sequence modulation by Gauss functions. The model permits to control the signal-to-noise ratio after its reduction to unity and to vary pulse shifts with respect to person steps irregularity. It has been shown that the model of a person seismic signal with noise agrees with experimental data.
FUNCTIONAL TESTS FOR MULTIPROCESSOR COMPUTER SYSTEMS
Authors: Benenson M. Z. , Divin A. P.
Published: May 2019

The article covers the technique of construction of a subsystem functional tests designed to check the configuration of the instrument and measure the performance of a multiprocessor computing system (platform). Algorithms for determining the configuration of the system and measure the performance of processors in heterogeneous computing system. For interaction between the processors was chosen as the most common parallel programming interface standard for data exchange MPI. Performance measurement was carried out using a known test sets Intel - MPI Benchmark and HPL LINPACK, which allow to fully assess the bandwidth of communication network and the performance of the modules of Central processor computing platform. Received graphs of throughput and performance. The methods of measuring the speed exchange with memory and storage on magnetic disks. To measure the performance of graphics processors proposed an original methodology based on the parallelization of computing across multiple processors Given the overall estimation of maximum performance heterogeneous computing system. The obtained results confirm the effectiveness of the proposed methods to verify the claimed functionality of multiprocessor computing systems.
HARDWARE-SOFTWARE COMPLEX FOR TESTING OF BEHIND-THE-HORIZON RADAR STATIONS USING THE METHOD OF AUTOMATIC PASSIVE AIRSPACE SURVEILLANCE
Authors: Sorokin S. A. , Sverdlov S. S. , Kucherov Yu. S. , Sobchuk V. A.
Published: May 2019

The basis of the work of over-horizon radar stations is a jump mechanism of propagation of short-range radio waves, which involves the adaptation of the equipment to continuously changing geophysical and noise conditions. The review of the station’s area of responsibility is usually carried out sequentially at a number of frequencies. To assess the probability of correct detection of air objects and other characteristics of over-horizon radar stations, a comprehensive test simulation stand and an algorithm for assessing the current combat capabilities are used. A comprehensive simulation test stand to test and confirm compliance with the achieved characteristics of the station simulates different variants of the air situation in the field of view of the radar. It is proposed to use the technology to obtain the parameters of the routes of scheduled aircraft, which are equipped with dependent observation equipment, compare them automatically with the parameters of the finally detected route of the station and to evaluate the characteristics of over-horizon radar in real helio and geophysical conditions. Thus, the hardware and software complex for testing over-horizon stations for flight air objects using the method of automatic passive review of airspace, including outside the territory of the Russian Federation will allow to evaluate their tactical and technical characteristics in automatic mode, in real conditions of application.
AUTOMATION OF CONTROL AND DIAGNOSTICS OF ELECTRICAL CIRCUITS FAILURES WHEN PERFORMING ORGANISATIONAL REPAIR OF AD WME COMPONENT PARTS
Authors: Komarov M. V. , Krivolapov V. L. , Strakhov A. F.
Published: May 2019

Restoration of the AD WME operability at their deployment sites in case of REE failures is performed by an aggregate method,i. e. by replacing faulty structural REE RCs with serviceable ones from the operational spare tools and accessories kits of the AD WME system. Detection and localization of the faulty RCs is performed by means of built-in test equipment of the AD WME component part (CP). However, there are some situations when replacement of possibly faulty RCs with serviceable ones does not result in restoration of operability of the repaired CP. In this cases, reasons for the CP failure are defects of electrical connections being a part of the CP. In order to detect and localize the CP electrical wiring defects, it is necessary to control and diagnose a state of the electrical circuits with regard to assessment of electrical connections integrity according to the CP electrical scheme and lack of faults between these connections. Works related to detection of the CP electrical wiring defects at their proper locations shall be carried out within limited workspace of the CP cabins of the AD WME pieces. This fact excludes feasibility of applying bulky standard industrial plants of electrical wiring control [1-3]. Given these limitations, an innovative method and a compact portable automated control system of electrical circuits were developed under the patents of JSC Principle Production and Technical Company Granit. The article contains specificity of implementation control of the REE CP electrical circuits at their proper locations applying the said method and the required automated system.
AREA OF INITIAL POSITIONS OF A UAV (UNMANNED AERIAL APPARATUS) IN THREEDIMENSIONAL SPACE
Authors: Makhonin I. O.
Published: May 2019

When landing an unmanned aerial vehicle (UAV) on a ship, it is required to perform the specified boundary values of the state vector at the moment of approach to the hook equipment. The article considers the solution of the problem of calculating the points of the area of initial positions of UAV. It is mean, that each point provide hitting for the UAV to a predetermined aiming area at a given time in the vicinity of the hitch. In this case, the phase coordinates of the UAV at the time of approach to the hook device have to defined. To calculate the points located on the boundary of the area of initial positions, auxiliary problems of optimal program control have been solved. To solve it, the necessary conditions for the maximum principle of L. S. Pontryagin were used. The article considers the algorithm of the computational solution of the auxiliary problem of optimal program control and the results of calculating points thats located at the far boundary of the area of initial positions, that is mean, that points located at the maximum distance from the aiming point (the location of the hook device).
HYDRODYNAMIC THERMOIONIC SOURCE OF SPACECRAFT RADIO-ELECTRONIC SYSTEMS POWER SUPPLY
Authors: Kolychev A. V. , Kernozhitskiy V. A. , Unakov L. P.
Published: May 2019

Actual problem of modern equipment is the electricity supply of radio-electronic systems of remote sensing of Earth of the spacecrafts and complexes functioning in difficult weather conditions, for example, in the Arctic or in case of emergency situation when it is necessary to give signal «about need of the help». Data on the hydrodynamic thermal electron emission converter (HTEEC) developed in Baltic State Technical University VOENMEH, and also on option of its laboratory sample (LS) are provided in the present article. The HTEEC device is that in active zone HTEEC the current of flows of weakly ionized plasma (FWIP) with high speeds will be organized (0,5-7 km/s and above). It allows to have working surfaces of the cathode and GITEP anode at distances much more than sizes, characteristic of classical TEC, in 0,3-0,5 mm. Thus reliability of HTEEC due to lack of need of maintenance of fine-line spacing and minimizing of negative effects of change of form of active surface of the cathode increases. The laboratory sample is intended for carrying out complex pilot studies of the HTEEC device for two types of propulsive masses -combustion products of organic fuel and inert gases with additives of alkaline metals. Results of the real research have found the reflection when working on the subject «Geksapod» which is carried out to Baltic State Technical University VOENMEH. Field of application of such converters is independent power sources of the Arctic vehicles functioning on the basis of organic fuel and spacecrafts of radio-electronic remote sensing of Earth with superlong life.
OPENVX STANDARD TENSOR IMPLEMENTATION FOR ARTIFICIAL NEURAL NETWORKS ON SPECIALIZED PLATFORMS
Authors: Vorotnev D. V. , Golovanov R. V. , Kuznetsov D. A. , Panfilova K. V. , Umnyashkin S. V. , Sharonov I. O.
Published: May 2019

NNE extension for OpenVX 1.2 standard adds functions that implement layers of artificial neural networks. Each layer receives a tensor object as input, processes it and passes the result tensor to the next layer. Implementation recommendations and hardware optimization of tensor processing functions were proposed. The types of data supported by the OpenVX standard for creating of tensors are given, and the operations for processing them are described. The mathematical and software models of tensors are described in detail, which allow performing element-by-element processing. A new program model of the tensor is proposed, which allows to reduce the implementation of functions for processing tensors to the re-invocation of functions for image processing of the OpenVX standard. There are a detail description of functions algorithms from NNE extension based on the proposal method in the paper. Advantages and disadvantages of considered approach function implementation were shown.
DESIGN AND VERIFICATION FLOW OF MULTI-STAGE SIGMA-DELTA ADC DIGITAL CORE
Authors: Skripnichenko M. N. , Lipatov I. A.
Published: May 2019

There is a need for analog-to-digital converters with high signal-to-noise ratio and large signal bandwidth to solve a number of radiolocation problems. Developing such ADC is a challenge in the analog core, digital core and verification. The design flow of the digital core must take into account the possibility of changing the analog core specification at any design stage, provide the ability to quickly obtain the synthesizable RTL code of the device and conduct its functional verification. Automation tools were used to reduce the time spent on development and verification. This article describes the developed software package that generates the synthesizable RTL code and the verification environment configurations for each stage of development of the analog core of the multi-stage sigma-delta ADC.
ADAPTIVE ALGORITHM BASED ON NONLOCAL MEANS IN IMAGE PROCESSING
Authors: Zhertunova T. V. , Yanakova E. S.
Published: May 2019

This article describes the existing problem situation associated with the absence of resource-lights denoising algorithms, capable to produce good-quality output images in the different intensity noise conditions without blurring the boundaries, contours and basic structure. The adaptive algorithm proposed in the article allows to solve this problem due to the developed algorithms of splitting the search region into two sets of similar and points different from the pixel and adapting of the kernel type to the image region, depending on the presence or detection of structural and smooth pixels. The results of the proposed algorithm and the standard method of nonlocal means are compared with the metrics of the peak signal-to-noise ratio and structural similarity. It is found out that the developed adaptive algorithm is surpass by far than the standard method both on numerical results and on the quality of the image processing.
Eficiencia del extracto vegetal de Datura stramonium L. como insecticida para el control de la mosca sierra
Authors: Flores-Villegas Mónica Yazmín , González-Laredo Rubén Fancisco , Prieto-Ruíz José Ángel , Pompa-García Marín , Ordaz-Díaz Luis Alberto , Domínguez-Calleros Pedro Antonio
Published: May 2019

Las plagas representan un efecto negativo en los bosques y a menudo son subestimadas por el hombre. Sus brotes contribuyen directa o indirectamente en la economía y el medioambiente. Uno de los principales problemas en los ecosistemas forestales son las plagas defoliadoras del pino, conocidas como “mosca sierra”. El objetivo de la investigación fue caracterizar extractos de las diferentes partes (hoja, tallo y raíz) de Datura stramonium para evaluar sus propiedades tóxicas y posible uso como insecticida orgánico sobre larvas de Neodiprion autumnalis. Se evaluó en laboratorio a las 0 h, 3 h, 6 h, 12 h y 24 h la repelencia y mortalidad de la mosca sierra en Pinus leiophylla, tratados con extractos hidroalcohólicos. Para llevar a cabo la caracterización se realizó la extracción de alcaloides. Los extractos fueron analizados por cromatografía de gases acoplada a espectrometría de masas lo que permitió identificar los alcaloides presentes que fueron de tipo tropánico. Las medias estadísticas fueron comparadas por la prueba de Tukey a 5% de probabilidad y se encontraron diferencias entre los tratamientos realizados para cada parte vegetal y dosis aplicada (10 mg/L, 30 mg/L y 50 mg/L) con respecto al testigo. Los resultados mostraron porcentajes de mortalidad de 7% hasta 30%, dependiendo de la dosis y del tiempo de exposición sobre las larvas. La estructura vegetal que presentó mejores resultados fue la raíz, seguida por las hojas y el tallo. Los extractos pueden considerarse como parte fundamental de un manejo integrado de plagas.
MEASURING PUBLIC ASSET PERFORMANCE USING OUTPUTBASED APPROACH: EVIDENCE FROM INDONESIA
Authors: Puspitarini Intan , Akhmadi Muhammad Heru
Published: May 2019

Islamic garden is a traditional garden concept that is significantly related to the history of the Muslim civilization. The first establishment of the concept was in the 7th century through the formation of the Persian Garden. Presently, the idea of the Islamic garden is beginning to be overlooked as the contemporary garden design is becoming a current trend. The situation has given a negative impact towards the implementation of the traditional garden concept. This study is conducted to identify the physical characteristics of the Islamic garden. The firstobjective is to determine the chronology of the Islamic garden design and, second, to categorize the physical characteristics of the garden according to the level of its importance. Three types of methods are embedded in the study, which are the document analysis, site study, and semi-structured interviews. The method of analysing the data is using the Atlas.ti and Microsoft Excel software. The result gathered are categorized into two important aspects: (1) the movement of the Islamic garden concept in response to the history of the Muslim civilization and (2) the list of the physical characteristic of the Islamic garden. The result is triangulated as to develop an understanding on the list of the significant physical characteristics of the Islamic garden.
MEASURING TECHNICAL EFFICIENCY OF MALAYSIAN REAL ESTATE INVESTMENT TRUSTS: A DATA ENVELOPMENT ANALYSIS APPROACH
Authors: Chuweni Nor Nazihah
Published: May 2019

The research examines the technical efficiency (TE) and economies of scale for the Malaysian Real Estate Investment Trust (M-REITs) from 2010 to 2014, using a non-parametric approach of Data Envelopment Analysis (DEA). The nonparametric approach of Variable Return to Scale DEA (VRS-DEA model) was used to estimate the efficiency scores for M-REITs. The negative inefficient value for the technical inefficiencies is identified as a result of both poor input utilisation (managerial inefficiency) and failure of M-REITs to operate at optimum scale (scale inefficiency). The mean technical efficiency (TE) measures ranged from as low as 41.70% in 2011 to as high as 84.30% in 2014. Despite having the Sharia requirement, Islamic REITs in Malaysia provide an effective investment opportunity evidenced by the higher scores for all efficiency measures, as compared to conventional REITs for the period under study. Pure technical inefficiency has a greater deviation in the efficient frontier than scale inefficiency, suggesting that M-REITs inputs are not fully minimised to produce more outputs. With regard to scale inefficiency, M-REITs are operating at economies of scale, indicating the importance of expansion or growth to improve on efficiency performance. This will then allow M-REIT managers to formulate better strategic investment decisions.
El Programa de Bachillerato a Distancia (B@UNAM), en Chicago
Authors: Zúñiga Salas Irasema
Published: May 2019

Se presentan los antecedentes del Bachillerato a Distancia de la UNAM impartido en la Escuela de Extensión de Chicago, así como información de la estructura organizativa y de sus principales resultados después de dos años de iniciada la gestión.
Sistema de evaluacion B@UNAM
Authors: Villatoro Alvaradejo Carmen
Published: May 2019

Se presenta el sistema de evaluación del Bachillerato a Distancia de la UNAM (B@ UNAM), basado en su modelo de calidad con 29 estándares. Incluye la evaluación de materiales, docentes y aprendizaje y los actores de dicho proceso son expertos disciplinarios, académicos y estudiantes. También el proceso de evaluación del desempeño de los asesores y se describe la toma de decisiones con respecto a la recontratación con base en resultados de dicha evaluación.
El Bachillerato Universitario en la Modalidad a Distancia (BUMAD) de la Universidad Autónoma del Estado de México
Authors: Guadarrama Rico Luis Alfonso
Published: May 2019

El propósito del artículo es condensar una información reflexiva sobre el trabajo realizado, así como un somero análisis de algunos aspectos que se enfrentaron en este recorrido memorial.

La evolución social tan acelerada afecta directamente el sistema educativo, por lo cual, la tarea es revisar continuamente las orientaciones de conocimientos y en especial la relación entre el discente y el docente en el ámbito equilibrado de una educación formal, sin olvidar el lecho histórico que dio surgimiento a esta modalidad.

Por ello, se concretiza y ordena en los diferentes apartados los productos resultantes de este ejercicio de revisión; enfatiza la importancia de conocer y reconocer el contexto, el trabajo y la autocrítica al modelo para con ello mejorarlo; favorece una base de principios, valores y conocimientos para que los discentes que opten por el modelo a distancia de la UAEMex puedan acceder al nivel superior universitario y mejorar así su existencia.
UNA VISIÓN INTEGRAL SOBRE LA EXPERIENCIA PEDAGÓGICA EN EL BACHILLERATO TECNOLÓGICO BIVALENTE A DISTANCIA DEL IPN
Authors: Sierra Sánchez Cristina
Published: May 2019

Este escrito describe la experiencia que he adquirido al interrelacionarme con algunas de las figuras que intervienen en el bachillerato a distancia del Instituto Politécnico Nacional: el diseño didáctico de las unidades de aprendizaje (planeación); estudiante (receptor-aprendizaje), profesor–asesor (facilitador del contenido) y profesor–tutor (acompañamiento a los estudiantes).
Cómo manejar la pregunta detonadora en un escenario virtual
Authors: Cruz Moreno Eduardo
Published: May 2019

El uso de las preguntas detonadoras debe convertirse en una estrategia fundamental para el asesor del Bachillerato Tecnológico Bivalente a Distancia del IPN, con el objeto de guiar de forma correcta a los alumnos dentro de los foros, tomando como base los diferentes contextos en los que se desarrollan, con el ánimo de clarificar las competencias a desarrollar por el alumno y de evitar la confusión a la que tiende la hipercontextualidad, producto de la Internet.
A partir de estrategias de comunicación escrita a distancia: imagine un barco y a sus tripulantes
Authors: Fabián González Waldo Manuel
Published: May 2019

En el marco del curso propedéutico de "Lectura y Redacción" del Bachillerato a Distancia del Gobierno del Distrito Federal, uno de sus asesores reflexiona sobre su práctica docente al describir estrategias de comunicación escrita que ha desarrollado y/o aplicado exitosamente durante tres años, con base en un idílico grupo que condensa cronológicamente todos los trayectos, desde luego, cuando el asesor crea su perfil, envía mensajes ose despide. Las maneras de contar aquí, por momentos son poco convencionales, en tanto necesariamente prevalecen analogías entre el lenguaje marítimo y el léxico propio de la educación a distancia. A saber: “los apuntes de un capitán de barco en su bitácora” y “el encuadre de un asesor a distancia en su cuaderno”, “los tripulantes” y “los estudiantes a distancia”, o “las tormentas” y “las fallas de plataforma”.
Polivirtual: modelo de producción para recursos didácticos digitales de apoyo al bachillerato a distancia
Authors: Fernández Quiroz Silvia Leticia
Published: May 2019

En este trabajo se explican los aspectos más relevantes que conforman el modelo de producción Polivirtual, integrado por seis documentos que orientan la producción de las unidades de aprendizaje de los bachilleratos a distancia del IPN. El modelo se divide en dos subprocesos simultáneos: el diseño de recursos gráficos y la programación para implementar unidades de aprendizaje en la plataforma educativa del Polivirtual.
Educación a distancia como solución al rezago estudiantil en la Educación Media Superior
Authors: Martínez Godínez Verónica Laura
Published: May 2019

En 2009 México estuvo en uno de los últimos lugares de la OCDE por su baja calidad educativa. Ese mismo año, el analfabetismo en jóvenes de 15 o más años, se situó en los rangos de muy alto, alto y medio en los estados de Chiapas, Oaxaca, Campeche, Tabasco y Quintana Roo. El primer lugar lo ocupó Chiapas con 21.33% de rezago educativo, y Oaxaca, el tercero con 19.33%. A nivel nacional, en el ciclo escolar 2006-2007, de 5 millones 979 mil 256 de alumnos que terminaron la secundaria, sólo 3 millones 301 mil 555 ingresaron a educación media superior. Esto significa que el 55 por ciento de jóvenes ya no continuaron en los siguientes niveles educativos, aunque la Ley General de Educación establece que toda persona tiene derecho a recibir educación, además de que ésta debe ser de calidad. Ante esta problemática, el gobierno federal ha puesto en práctica acciones para ampliar la cobertura, favorecer la equidad y mejorar la calidad y pertinencia de la educación media superior, entre otras: crear nuevas instituciones de educación superior, diversificar los programas educativos, fortalecer las modalidades educativas e incrementar los programas de becas (Programa Desarrollo Humano Oportunidades).

Para abatir el rezago educativo, las instituciones y los programas de educación a distancia pueden ser fundamentales. La opción tiene bajo costo, puede llegar a comunidades rurales aisladas, ser accesible para personas con discapacidad, para madres y padres de familia cuyos horarios de trabajo no les permiten asistir a escuelas presenciales o para los estudiantes sin acceso a la educación presencial por falta de espacios.
Auto regulación en el bachillerato a distancia del Estado de México
Authors: García Salas Lilia , Ortega Massé Juan Carlos
Published: May 2019

Se realizó un análisis comparativo de dos generaciones de alumnos del Bachillerato a Distancia del Estado de México. Se evaluó su autorregulación como parte de las habilidades adquiridas en esta modalidad. Se encontraron diferencias significativas: la primera generación presentó mayor autorregulación y un mejor rendimiento académico. Los hallazgos permiten afirmar que el bachillerato a distancia favorece el desarrollo de la capacidad de autorregulación.
Inclusión de personas con discapacidad en la educación virtual: el caso del Bachillerato a Distancia, U de G
Authors: Camacho Real Claudia , Varela Navarro Gerardo Alberto
Published: May 2019

El presente trabajo reseña el contexto, metodología y avance de un proyecto particular sobre la iniciativa de inclusión educativa impulsada por las acciones del Sistema de Universidad Virtual (SUV) de la Universidad de Guadalajara. Desde hace más de una década, la inclusión ha sido retomada en la agenda internacional, debido a la exclusión generada por los sistemas educativos desde fines del siglo XIX (Guajardo, 1999). El proyecto se ha piloteado en un grupo de bachillerato virtual con personas con capacidades diferentes del CRIT de Occidente. Utilizando a las TIC como medio de inclusión se buscó identificar sus necesidades tecnológicas y de formación mediante un pre diagnóstico y diagnóstico de necesidades de ingreso al Sistema a Distancia. Aunque el SUV ha sido partícipe de la inclusión de manera natural, en los procesos no se habían tomado en cuenta algunas cuestiones, principalmente las de accesibilidad y necesidades educativas particulares. Este trabajo es un punto de partida para reflexionar respecto a los itinerarios posibles para atender la diversidad de la demanda educativa.
El asesor a distancia: Experiencias e ideales
Authors: Macías Mendoza Francisco Javier
Published: May 2019

Brindar asesoría es parte esencial del proceso de aprendizaje en la educación a distancia, actividad que abre un cuestionamiento: si el profesor a distancia debería indagar sobre los problemas que se les presentan a los estudiantes cuando están en un curso; por tanto, se requiere saber de manera fehaciente si el sentido común basta, esto es, si el docente es autosuficiente en la labor de asesoría.

Es válido aceptar que de manera ideal los asesores orientan a los estudiantes para que comprendan con mayor claridad las actividades del curso, porque los motivan para que cumplan en el tiempo preciso, porque aún los estimulan para que mejoren sus formas de aprender y de enfrentarse al curso.

Así, este texto será una reflexión, con una perspectiva estrictamente personal, sobre la actividad educativa en la modalidad a distancia, como asesor y diseñador de actividades de aprendizaje.
Calidad en la atención a usuarios en el área de Soporte Técnico
Authors: Naranjo Sánchez Lilia Donaji
Published: May 2019

En este astículo la autora describe los procesos que se realizan en el área de Soporte Técnico de B@UNAM y su interacción con los especialistas que contribuyen al óptimo aprendizaje del estudiante de Educación Media Superior en línea.
Una mirada al Conectivismo: la diversificación del Entorno Personal de Aprendizaje en la educación a distancia mediante el uso de herramientas web 2.0 con fines educativos
Authors: Ruiz Vázquez José Leonardo
Published: May 2019

En este artículo el autor hace un análisis de ciertas aplicaciones tecnológicas cuyo uso está en auge: aquellas que pertenecen a la web 2.0, a las redes sociales, a las sociedades en línea.
XML: una herramienta de apoyo para la creación de cuestionarios en cursos virtuales
Authors: Luna Miranda Héctor Hugo
Published: May 2019

El presente trabajo se centra en la descripción del uso de XML1 como herramienta de apoyo para la elaboración de cuestionarios, especí-ficamente utilizado en los cursos virtuales de bachillerato de la Universidad Virtual del Estado de Guanajuato (UVEG), propician-do la reutilización de un mismo documento XML aplicando diferentes tecnologías según el contexto y las necesidades pedagógicas al momento que se diseña y desarrolla un curso virtual.
La información no financiera y el desempeño financiero empresarial
Authors: Correa Mejía Diego Andrés , Reyes Naranjo Diana Camila , Montoya Beltrán Keila Marley
Published: May 2019

Este artículo pretende validar los efectos que tienen los reportes de sostenibilidad en el desempeño financiero de las empresas colombianas. A través de un modelo de datos de panel y la información de 30 empresas que cotizan en la bolsa de valores colombiana para el periodo 2012 - 2015, se evalúa la incidencia que tienen los reportes de sostenibilidad sobre el desempeño financiero de este grupo de empresas. Se concluye que el tamaño de la empresa y la cantidad de indicadores ambientales tienen un efecto positivo en el desempeño financiero, mientras que la antigüedad de la misma causa lo contrario.
BAGAIMANAKAH KONFLIK PERAN DAN BEBAN KERJA MEMPENGARUHI KINERJA KARYAWAN DENGAN BURNOUT SEBAGAI VARIABEL INTERVENING
Authors: Syamsu Nadya Nandavati , Soelton Mochamad , Nanda Andesna , Putra Ratyuhono Linggarnusantra , Pebriani Putri
Published: May 2019

Penelitian ini bertujuan untuk menguji dan menganalisis pengaruh konflik peran dan beban kerja terhadap kinerja karyawan dengan burnout sebagai variabel intervening untuk karyawan PT. EDI Indonesia. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Objek penelitian ini adalah 80 karyawan PT. EDI Indonesia. SEM-PLS adalah alat yang digunakan untuk menganalisis data statistik dalam penelitian ini. Hasil penelitian menunjukkan konflik peran yang memiliki efek positif dan signifikan terhadap kelelahan. Beban kerja yang berpengaruh positif dan signifikan terhadap burnout. Konflik peran yang berpengaruh negatif dan signifikan terhadap kinerja karyawan. Beban kerja yang berpengaruh negatif dan signifikan terhadap kinerja karyawan. Burnout yang berpengaruh negatif dan signifikan terhadap kinerja karyawan.
PENGARUH GAYA KEPEMIMPINAN DIREKTIF DAN DISIPLIN KERJA TERHADAP KINERJA KARYAWAN (Studi Kasus Pada PT NIPSEA PAINT AND CHEMICALS di JAKARTA)
Authors: Sutrisno Atik Mustafidah
Published: May 2019

Penelitian ini bertujuan untuk menguji dan menganalisis pengaruh gaya kepemimpinan direktif, dan disiplin kerja terhadap kinerja karyawan PT. NIPSEA PAINT AND CHEMICALS di Jakarta. Pengumpulan data dilakukan melalui penyebaran kuesioner dengan jumlah sampel sebanyak 67 responden dan dengan menggunakan pendekatan deskriptif kuantitatif. Karena itu, analisis data yang digunakan adalah analisis statistik dalam bentuk uji regresi linier berganda. Hasil penelitian ini menunjukkan bahwa secara parsial dan simultan variabel Gaya Kepemimpinan Direktif dan Disiplin Kerja berpengaruh terhadap Kinerja Karyawan pada PT NIPSEA PAINT AND CHEMICALS JAKARTA. Hal ini dibuktikan dari hasil uji simultan (Uji F) dan hasil Uji Parsial (Uji t) juga menunjukkan nilai signifikan dari dua variabel bebas yang mendukung hipotesa. Oleh karena itu hasil uji dari penelitian ini menyatakan bahwa terdapat pengaruh secara simultan antara variabel Gaya Kepemimpinan Direktif dan Disiplin Kerja terhadap Kinerja Karyawan Pada PT Nipsea Paint And Chemicals Jakarta.
O impacto da educação a distância na identidade docente
Authors: Gonçalves Vaz Bárbara Regina , Gonçalves Vaz Bárbara Regina
Published: May 2019

O discurso recorrente e que vem se acentuando sobre a necessidade de uma educação de qualidade e continuada, ocasionada pelas tantas demandas da globalização, vem desafiar os sistemas educacionais. Nesse cenário é que a EAD, conquista seu espaço na sociedade, abrangendo um número crescente de sujeitos. As estratégias propostas pelo BM privilegiam a formação rápida e barata como critérios de eficiência, percebendo-se uma reestruturação capitalista na qual a educação está inserida em uma realidade econômica que busca adequar-se ao mercado. Daí, a emergência de outras modalidades de ensino, como a EAD que tem se destacado nos discursos educacionais e vêm causando grande impacto na (re)configuração da identidade profissional docente. Nessa perspectiva propõe-se analisar e problematizar as mudanças causadas no processo de (re)configuração da identidade do profissional docente na modalidade à Distância, em um estudo de caso no curso de licenciatura em Matemática EAD da UFPEL, através de análise documental, bibliográfica e de discurso dos professores e coordenadores. Este artigo é parte constituinte de uma pesquisa qualitativa que culminou em minha tese de doutorado, a fim de, analisar, compreender e interpretar como a EAD corrobora na (re)configuração da identidade do professorado. As mudanças no mundo do trabalho alcançaram o âmbito escolar, exigindo do professorado um novo perfil, com o acréscimo de suas atribuições, desencadeando um processo de precarização do trabalho.
MALBA TAHAN E SEUS REFERENCIAIS SOBRE O ENSINO DA MATEMÁTICA
Authors: Santana Rogério Joaquim
Published: May 2019

Este trabalho está fundamentado em pesquisas realizadas nas obras do professor Júlio Cesar de Mello e Souza, conhecido também pelo seu heterônimo Malba Tahan. Buscamos trazer subsídios para ampliar nosso conhecimento e abrir debates sobre conceitos didáticos defendidos pelo autor e compará-los às práticas e conceitos atuais, trazendo para a discussão as metodologias de ensino defendidas por ele, como também as críticas a metodologias e estratégias como o algebrismo que Malba Tahan atacava duramente por considerar ser prejudicial para o ensino da Matemática. Trazemos nesse artigo conceitos considerados modernos e muito utilizados nos dias atuais e convidamos o leitor a realizar reflexões sobre a prática docente e indagamos o quanto podemos aprimorar nossos conceitos de ensino observando as orientações realizadas pelo Professor Júlio Cesar.
Editorial
Authors: Igliori Sonia Barbosa Camargo
Published: May 2019

Este é o Editorial do número 1 do volume 6 da Revista Ensino da Matemática em Debate, revista do Departamento de Matemática da PUC-SP, do ano de 2019. O número apresenta seis artigos científicos.
GLOBALIZAÇÃO E HUMANISMO INTEGRAL
Authors: Agostinho Theodoro Vicente , Guimarães Antônio Márcio da Cunha
Published: May 2019

O presente trabalho tem como escopo demonstrar a conexão existente entre a globalização e o humanismo, essencialmente voltado para o humanismo integral, conceito estrito da palavra, onde garante a todos uma dignidade essencial sem qualquer distinção. Referido estudo enaltece a proteção a dignidade da pessoa humana tutelado na Constituição da República Federativa do Brasil de 1988, reforçando que o valor da vida humana é incomensurável, de modo que seu valor intrínseco não depende e não é acrescido por outra qualidade e, sua grandeza provém do fato unicamente de ser pessoa, digna de proteção e garantia do Estado para o progresso humanitário em conjunto com os avanços da globalização, visando à construção do bem comum.
Sustainable Education Assessment ABK Viewed from The Condition Physical Characteristics of Regional, Social, and Economic Community in Underdeveloped Area Ranah Batahan, Pasaman Barat District, Indonesia
Authors: Nur Arsida , Safii Nur Azizah
Published: May 2019

The problem in this research study originated from education of ABK in the rural area, Ranah Batahan Sub-district of Pasaman Barat. There were many problems related to the continuity of education of ABK in this area. The research used mixed method (combined) to collect the data besides. It conducted an observations and interviews to reinforce the data. The respondents were chosen by using total sampling and for the techniques of data analysis; it used reduction, display, verification test of validity and reliability. To find the solution of this problem the researcher with a FGD (focus group discussion) together with principals, teachers, and UPTPD of Ranah Batahan Sub-district. From the research the result showed that the physical characteristic of the area was difficult to reach. From the social side, the research showed that there is not enough concern guides by the parents of ABK. So that ABK had a low motivation to continue their study. Besides, there were problem in economic community education the research showed. In this area, most of the people had a problem related to the cost for the education of ABK. It was also constrained to the sustainability of education of ABK. So that it was important to give an effort to continuity education of ABK in Ranah Batahan Sub-district. For example, it was conducted by building a SLB together with the parents of ABK, people, head master, and also the government.
The Effect of Round Robin Technique and Anxiety Toward Students Speaking Achievement at Fort De Kock Nursing Academy
Authors: Giffari Abizar
Published: May 2019

This study aims to explain the effect of Round Robin techniques and student anxiety on speaking ability. The design of this study was a quasi-experimental study with a factorial 2x2 design. The population of this study was first-level students at the Health Academy of Fort De Kock Bukittinggi. The ability to speak and the anxiety level questionnaire was used as a data collection tool for this study. Furthermore, the research data was by using the T-test formula and two-way ANOVA. The results showed that (1) groups of students with Round Robin techniques had better speaking skills than students with Memorization techniques, (2) groups of students with high anxiety with Round Robin technique has better speaking skills than Memorization techniques, (3) groups of students with low anxiety with Round Robin technique have good speaking skills from Memorization techniques and (4) there is no interaction between the two and anxiety towards students' speaking ability, where Fcount (0.0251) is lower than Ftable (4.96).
THE EFFECT OF SONG IN TEACHING ENGLISH
Authors: Ningsih Nurfajri
Published: May 2019

This research aims at finding the effectiveness of using song in teaching English at Sulawesi flight college. The researcher applied pre-experimental method, with one group pretest and posttest design which employed speaking test to find out the students’ speaking performance in terms of accuracy. The sample consisted of 40 students used purposive sampling technique taken from the population of the second semester students of Sulawesi Flight. The result of the data analysis indicated that there was significant difference of student’ English achievement before and after being taught by using songs. It is proved by result of statistical analysis of the level significance 0.05 with degree of freedom (df) =  N-1 = 46-1 = 39 which indicated that( t- obs =  4.06 >  t –table =  (1.68 ). It can be said that there is a significant difference of achievement of the students after the treatment.
Color Grading Systems to Classify Ripeness of Apple Mango Fruit
Authors: Prayogi Yanuar Risah , Budiman Saiful Nur
Published: May 2019

Harvesting of apple mangoes fruit that simultaneously causes not all apple mango fruits are harvested ripe. Farmers should sort the apple mango manually. So, harvesting in large quantities will take a long time. There are several obstacles to sort the apple mango fruit manually. It needs skills and experiences to sort the apple mangoes fruit and it needs many workers. In addition, when the apple mango is ripe and not immediately sorted, it will be too ripe and decayed, so cause losses. Previous research has already made the apple mango classification system mango level but required an expensive tool and take a long time to process one apple mango. This research proposes a new strategy to measure the ripeness level of apple mango fruit, especially apple mango at low cost, without the expensive device and takes a short time based on the apple mango skin color region using the feed-forward neural network. The test used 214 images consisting of 4 classes. Validation test using k-fold of 7, 9, and 11 with an average accuracy of 90.61%, 91.41%, and 90.82%. Highest accuracy with a value of 91.41% on k-fold 9 while at k-fold 11 accuracy is lower but has the least standard deviation value. A small standard deviation means that the accuracy is more stable than others
Arylboronic Acids in Self-condensation of Glucosamines Forming Deoxyfructosazine, Catalysts or Reagents?
Authors: Wang Meifeng , Zhu Gan , Li Yiqun , Gu Liuqun
Published: May 2019

Arylboronic acids were widely used as efficient catalysts in direct amide formation and other organic transformations. Surprisingly, reports on their use as catalysts in carbohydrates synthesis are very rare even though boron acid-diol complexation was extensively investigated in molecular recognition for saccharides and so on. Here we developed an efficient arylboronic acids catalyzed dimerization of glucosamines forming deoxyfructosazine which is important compound in pharmaceutical and food industries, against a commonly held belief that excess amount of phenyl boronic acid (or boric acid) is a must. A catalytic mechanism was also proposed and arylboronic acids instead of their boronates was identified as catalysts.
Mechanistic Approaches for Modifying the Coordination Sphere of Metal–Amyloid-β Complexes: Covalent Adduct Formation and Oxidation
Authors: Han Jiyeon , Lee Hyuck Jin , Kim Kyu Yeon , Chae Junghyun , Lim Mi Hee
Published: May 2019

We report, for the first time, a novel mechanistic tactic to directly modify the coordination sphere of Cu(II)–Aβ complexes in a metal binding residue-specific manner, which can prevent Cu(II) binding to Aβ, modulate the aggregation of Cu(II)–Aβ, and generate chemically transformed Aβ with less cytotoxicity, to the best of our knowledge.
Direct CO2 Electroreduction from Carbonate
Authors: Li Yuguang , Lee Geonhui , Yuan Tiange , Wang Ying , Nam DaeHyun , wang Ziyun , Garcia De Arquer Pelayo , lum yanwei , Dinh Cao Thang , Voznyy Oleksandr , Sargent Edward H.
Published: May 2019

The process of CO2 valorization – all the way from capture/concentration of CO2 to its electrochemical upgrade - requires significant inputs in each of the capture, upgrade, and separation steps. The gas-phase CO2 feed following the capture-and-release stage and into the CO2 electroreduction stage produce a large waste of CO2 (between 80 and 95% of CO2 is wasted due to carbonate formation or electrolyte crossover) that adds cost and energy consumption to the CO2 management aspect of the system. Here we report an electrolyzer that instead directly upgrades carbonate electrolyte from CO2 capture solution to syngas, achieving 100% carbon utilization across the system. A bipolar membrane is used to produce proton in situ, under applied potential, which facilitates CO2 releasing at the membrane:catalyst interface from the carbonate solution. Using an Ag catalyst, we generate pure syngas at a 3:1 H2:CO ratio, with no CO2 dilution at the gas outlet, at a current density of 150 mA/cm2, and achieve a full cell energy efficiency of 35%. The direct carbonate cell was stable under a continuous 145 h of catalytic operation at ca. 180 mA/cm2. The work demonstrates that coupling CO2 electrolysis directly with a CO2 capture system can accelerate the path towards viable CO2 conversion technologies.
The Suzuki−Miyaura Coupling of Aryl Sulfones
Authors: Chatelain Paul , Sau Abhijit , Rowley Christopher , Moran Joseph
Published: May 2019

We describe conditions under which aryl sulfones act as electrophilic coupling partners in the palladium-catalyzed Suzuki–Miyaura cross-coupling (SMC) reaction. Sequential cross-coupling of arenes bearing sulfone, halide and nitro leaving groups permits rapid access to non-symmetric terphenyls and quaterphenyls starting from common functional groups. Mechanistic experiments and DFT calculations are consistent with oxidative addition into the sulfone C–S bond as the turnover-limiting step.
“Sobre a Essência da Crítica Filosófica em geral”, de G.W.F Hegel e F.W.J. Schelling: introdução e tradução
Authors: Lima Erick
Published: May 2019

Pretendo apresentar uma versão para o português da Introdução ao Jornal Crítico de Filosofia, texto de autoria de Hegel e Schelling. A versão traduzida é antecedida por uma introdução geral na qual procuro esclarecer, em linhas gerais, o contexto intelectual e biográfico no qual o texto surgiu (1), o significado geral da noção de Unphilosophie, a cuja crítica se dirige o esforço do Jornal (2); e, finalmente, o argumento perseguido pelo texto (3).
Agent of Chaos? Or a Reflection of American Society? The Truth Behind Gotham's Greatest Criminal
Authors: Smith Chelsea
Published: May 2019

Ever since his creation in 1939, the villain of the Batman comic series, the Joker, has had an unstated, yet very specific purpose (other than to be defeated by Batman); as this paper will demonstrate, he represents and reflects the fears and anxieties of American society at any given time period. What has been deemed ‘scary’ by society has changed throughout the decades, and the Joker’s repeated transformations follow these changes. Aside from being a villain mastermind in Gotham, Joker has been, among other things, a depression era-gangster, a post-war rebel, even the head of a modern-day terrorist group and a computer hacker. Each manifestation, while sharing the same name and a fondness for suits, exhibits different personalities, characteristics and desires, all of which change to reflect the darkest parts of American society, as they are perceived in the wider culture. In this way, the Joker becomes, for readers of this comic, a demonstration of the changing landscape of fear in America.