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Sample records for plants controlador digital

  1. Digital viscosity controller for fossil power plants; Controlador digital de viscosidad para plantas termoelectricas

    Energy Technology Data Exchange (ETDEWEB)

    Bautista B, Amberto; Ocampo P, Carlos; Gutierrez A, Ruben; Madinaveitia V, Miguel [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1989-12-31

    Upon the need of increasing the efficiency of the existing fossil power plants in Mexico, the Instrumentation and Control Department of the Instituto de Investigaciones Electricas (IIE) designed and built a viscosity controller to enhance the fuel oil heating process. The system strategy, that allows the control either by temperature or viscosity considers, as an important element, the changing characteristics of the supplied fuels. The equipment that is utilized forms apart of the line Acquisition and Control System (ACS) developed at the same Institute, that has been successfully applied in other systems. [Espanol] Ante la necesidad de aumentar la eficiencia de las plantas termoelectricas existentes en Mexico, el Departamento de Instrumentacion y Control, del Instituto de Investigaciones Electricas (IIE), diseno y construyo un controlador de viscosidad para mejorar el proceso de calentamiento del aceite combustible. La estrategia del sistema, que permite controlar ya sea por viscosidad o por temperatura, considera como elemento importante las caracteristicas cambiantes de los combustibles suministrados. El equipo que se utiliza forma parte de la linea SAC (sistema de adquisicion y control), desarrollada en el mismo Instituto, que se ha aplicado satisfactoriamente en otros sistemas.

  2. SIMULACIÓN DE CONTROLADORES DIGITALES SIMULATION OF DIGITAL CONTROLLERS

    Directory of Open Access Journals (Sweden)

    Carlos Álvarez G

    2009-12-01

    Full Text Available El presente trabajo tiene como objetivo la implementación de controladores digitales en un entorno de simulación controlado, para esto se desarrolla una plataforma de hardware que permite ejecutar los programas en lenguaje C generados en una estación de trabajo. Estos programas corresponden al controlador y a la planta que son generados por un software que genera dichos programas a partir de sus parámetros de modelación aplicando teoría de control digital sobre procesos reales.This paper describes an implementation of digital controllers in a simulation environment for including a hardware platform for running programs generated on a workstation. These programs for both the controller and the plant are generated by software based on parameters using digital control theory for real processes.

  3. SIMULACIÓN DE CONTROLADORES DIGITALES SIMULATION OF DIGITAL CONTROLLERS

    National Research Council Canada - National Science Library

    Carlos Álvarez G; Andrés Soto P; Francisco Watkins O

    2009-01-01

    ... teoría de control digital sobre procesos reales.This paper describes an implementation of digital controllers in a simulation environment for including a hardware platform for running programs generated on a workstation...

  4. Controlador Inteligente De Transporte

    Directory of Open Access Journals (Sweden)

    Alejandro J. Cabrera Sarmiento

    2011-03-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} En el presente trabajo se expone la concepción, desarrollo e implementación de un Controlador Inteligente de Transporte, el cual se encarga del control de una intersección semaforizada. La estructura hardware del controlador ha sido dividida en dos clases de tarjetas: las Tarjetas de Luces, encargadas de activar las señales para las indicaciones en una intersección (luces, sonido, etc. y la Tarjeta de Control, encargada del control de la intersección gobernando hasta cuatro tarjetas de luces con las cuales se comunica, así como de establecer comunicación con un nivel jerárquico superior. Ambas tarjetas han sido desarrolladas en base a microcontroladores de 8 bits de Microchip. El firmware de ambos tipos de tarjetas ha sido desarrollado y puesto a punto utilizando PIC C de CCS. El desarrollo de este controlador, de prestaciones superiores a los existentes actualmente en el país, permite su inserción en un Sistema Inteligente de Transporte (SIT que se encuentra en fase de desarrollo.

  5. Controlador empotrado para PBX de ocho abonados

    Directory of Open Access Journals (Sweden)

    René Yañes de la Rivera

    2011-11-01

    Full Text Available Normal 0 21 false false false ES X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Como parte del Proyecto Ramal del MIC “Plataforma de Conmutación de Paquetes”, previsto para el desarrollo de productos y tecnologías de origen cubano en el campo de la telefonía, se ha trabajado en el desarrollo de una central telefónica privada (PBX basada en el diseño digital con lógica programable. En el presente artículo se propone el diseño de un controlador de llamada empotrado para la atención de ocho abonados que constituye uno de los bloques fundamentales de dicha PBX. El controlador, desarrollado en VHDL y empotrado en un FPGA Cyclone II de Altera,  permite a través de dos tarjetas de abonado previamente desarrolladas, generar toda la señalización de abonado y establecer hasta cuatro conversaciones simultáneas.

  6. COMPARACIÓN DE DESEMPEÑO ENTRE CONTROLADORES FUZZY Y CONTROLADORES PROPORCIONALES

    Directory of Open Access Journals (Sweden)

    Sergio L. Martínez

    2012-01-01

    Full Text Available El objetivo de este trabajo es comparar el desempeño de dos controladores fuzzy y un controlador proporcional. La variable controlada es el nivel de un tanque con descarga gravitatoria. Para realizar el estudio, se desarrolló un simulador dinámico implementado en Simulink® de MatLab®. Para cada controlador estudiado, se evaluó la respuesta producida ante un cambio escalón en el set point. Para realizar una comparación válida, los controladores fueron ajustados para producir offset iguales. Los resultados obtenidos muestran que los sistemas basados en heurísticas (controladores fuzzy pueden ser tanto o más convenientes que aquellos basados en conocimiento determinístico (el controlador proporcional. Si bien el controlador proporcional actúa con mayor velocidad, los controladores fuzzy mejoran los valores de algunos de los índices más importantes de desempeño, como los sobrepicos, las oscilaciones y el factor de ripple.

  7. Investigation on the use digital controls instead of PID analog controls in the level control of steam generators of nuclear power PWR; Investigacao sobre o uso de controladores digitais em substituicao aos controladores analogicos PID para o controle de nivel de geradores de vapor de centrais nucleares PWR

    Energy Technology Data Exchange (ETDEWEB)

    Alvarenga, Marco Antonio Bayout

    2012-07-01

    The aim of this study is to identify current alternatives for the implementation of digital controllers in the level control of steam generators of nuclear power PWR (Pressurized Water Reaetor). It is intended to identify the types of digital controls that are available from the theoretical and conceptual viewpoints for this purpose. We investigate the advantages and disadvantages of each controller model. From this assessment are pointed the most suitable models in hierarchical scale. This evaluation also serves to suggest possible types of control installation as a whole, where the level control of the steam generators becomes just one of many controls that are part of the plant. In this case, the use of digital controls allows the non-linear and multivariable treatment which is characteristic of complex systems, such as the nuclear power generation. The treatment of nonlinearities and multivariable aspects allows a more detailed study of the stability of these plants when they are subject to transients or several accidents, such as the case of losing external power of transients. In the specific case of steam generators, the instabilities result from the emergence of the shrink and swell phenomenas, depending on the load variations of thermonuclear plant. The application of several types and digital controllers, considering these inherent characteristics of the level control of steam generators, allows to infer which types of controllers are more appropriate to treat instabilities of this type and to make conjectures in its use for the cases of more complex instabilities, considering the integration of all nucleus-plant controls.

  8. Controladores digitales estocásticos

    OpenAIRE

    Quero Reboul, José Manuel; García Franquelo, Leopoldo

    1995-01-01

    En este artículo se presenta la realización de controladores clásicos basados en el procesamiento lógico estocástico. Se aporta una descripción de las operaciones aritméticas básicas -suma, resta, multiplicación e integración. EI objetivo de esta arquitectura es proporcionar un conjunto de circuitos simples que permitan realizar estas operaciones con circuitos digitales simples. Como resultado de ello se pueden sintetizar controladores empleando dispositivos lógicos programables (FPGA). EI ...

  9. DEFENSINAS DE PLANTAS Y SU USO POTENCIAL COMO CONTROLADORES DE PLAGAS EN LA AGRICULTURA Plant Defensins and Their Potential Use as Pest Control in Agriculture

    Directory of Open Access Journals (Sweden)

    ADRIANA CAROLINA ROJAS ARIAS

    Full Text Available RESUMEN Las plantas, al igual que todos los organismos de la naturaleza, poseen elaborados sistemas de defensa contra patógenos, que pueden ser físicos y químicos, y producirse de forma constitutiva e inducida. Dentro de las barreras químicas inducidas se encuentra el grupo de proteínas de bajo peso molecular denominadas péptidos antimicrobianos (AMPs, al cual pertenecen las defensinas, péptidos con peso molecular entre 5 a 7 kDa, punto isoeléctrico de 9, y longitud de 45 a 55 aminoácidos; que tienen la capacidad de inhibir efectivamente el crecimiento de microorganismos fitopatógenos, en su mayoría hongos, y además, generan resistencia a condiciones abióticas de estrés en plantas. Este texto pretende realizar una descripción clara y actual de las características e investigaciones recientes con relación a las defensinas de plantas y sus más destacados usos en el control de patógenos en cultivos de importancia económica. Se plantea además la necesidad de profundizar en el conocimiento de dichas proteínas para su uso en estrategias de control tales como la producción de plantas y microorganismos transgénicos.ABSTRACT Plants, as all organisms in nature, have elaborate systems of defense against pathogens; which can be physical or chemical and produced in a constitutive and induced way. Among the induced chemical barriers, there is a group of low molecular weight proteins, known as antimicrobial peptides (AMPs. These peptides include defensins, which are peptides with a molecular weight about 5 to 7 kDa, isoelectric point of 9, and length of about 45 to 55 amino acids. Likewise, they have the ability to avoid the growth of phytopathogenic microorganisms, mainly funguses. Moreover, these peptides create resistance to abiotic conditions of stress in plants. This manuscript seeks to make a clear and current description about the recent characteristics and researches related to plant defensins and their most significant uses in

  10. Controlador MIDI basado en Kinect

    OpenAIRE

    González Berenguer, Roberto

    2013-01-01

    Este proyecto tiene como objetivo el desarrollo de una interfaz MIDI, basada en técnicas de procesamiento digital de la imagen, capaz de controlar diversos parámetros de un software de audio mediante información gestual: el movimiento de las manos. La imagen es capturada por una cámara Kinect comercial y los datos obtenidos por ésta son procesados en tiempo real. La finalidad es convertir la posición de varios puntos de control de nuestro cuerpo en información de control musical MIDI. L...

  11. General digitalized system on nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Akagi, Katsumi; Kadohara, Hozumi; Taniguchi, Manabu [Mitsubishi Electric Corp., Tokyo (Japan)

    2000-08-01

    Hitherto, instrumentation control system in a PWR nuclear power plant has stepwisely adopted digital technology such as application of digital instrumentation control device to ordinary use (primary/secondary system control device, and so on), application of CRT display system to monitoring function, and so forth, to realize load reduction of an operator due to expansion of operation automation range, upgrading of reliability and maintenance due to self-diagnosis function, reduction of mass in cables due to multiple transfer, and upgrading of visual recognition due to information integration. In next term PWR plant instrumentation control system, under consideration of application practice of conventional digital technology, application of general digitalisation system to adopt digitalisation of overall instrumentation control system containing safety protection system, and central instrumentation system (new type of instrumentation system) and to intend to further upgrade economics, maintenance, operability/monitoring under security of reliability/safety is planned. And, together with embodiment of construction program of the next-term plant, verification at the general digitalisation proto-system aiming at establishment of basic technology on the system is carried out. Then, here was described on abstract of the general digitalisation system and characteristics of a digital type safety protection apparatus to be adopted in the next-term plant. (G.K.)

  12. Diseño en VHDL de un controlador HDLC

    Directory of Open Access Journals (Sweden)

    Ilena Del Valle Crespo

    2013-06-01

    Full Text Available En esta investigación se presenta el diseño de un módulo de hardware embebido con la funcionalidad de un controlador HDLC (de sus siglas en inglés High Level Dato Link Control para una interfaz de línea digital E1. El sistema diseñado realiza las tareas de un transmisor-receptor, encargándose de acciones como la inserción y  detección de las banderas de inicio y fin de trama, la inserción y detección de ceros para evitar la existencia  de la secuencia de bandera en el campo de dato y el chequeo de trama. También incorpora una interfaz con un microprocesador  para la configuración de los parámetros iníciales y a través de ella se adquieren los datos de control que se van a transmitir o recibir. Cada uno de los bloques presentes en el sistema  se ha  diseñado a través del lenguaje de descripción de hardware VHDL (de sus siglas en inglés Very High Density Language empleando el software Xilinx ISE Design Suite 12.4. Finalmente, la investigación es implementada en la tarjeta de desarrollo SPARTAN3 Starter Board Kit y los resultados quedan validados con las comprobaciones pertinentes.

  13. Controlador fuzzy de dos etapas para frenos ABS

    OpenAIRE

    2003-01-01

    [ESP] En este artículo se presenta un nuevo controlador fuzzy jerárquico de dos etapas para sistemas ABS. En una primera etapa el controlador estima el deslizamiento que ha de tener la rueda del vehículo para conseguir la mejor frenada posible en función del tipo de firme y en una segunda calcula cual debe ser el par de frenado más adecuado para cada instante. [ENG]In this article a new two-stages hierarchical fuzzy controller for Anti-lock Braking Systems is presented. In the ...

  14. Control de velocidad de un motor de inducción utilizando un controlador Fuzzy

    Directory of Open Access Journals (Sweden)

    Madelín Lima Álvarez

    2011-03-01

    Full Text Available Se realiza la simulación del sistema de control de velocidad del motor de inducción. Se parte del enfoquevectorial y de un sistema de coordenadas adecuado a su futura utilización, utilizando para esto el lenguaje desimulación de sistemas dinámicos Simulink. En cuanto a la simulación del método de control vectorial porcampo orientado se ha empleado el denominado método de control vectorial indirecto. El control de la velocidaddel motor se simuló utilizando un controlador Fuzzy, comparándose posteriormente estos resultados con losobtenidos mediante la utilización de un controlador PI digital.  This work carries out the simulation of speed control of induction motor. It is based on the field orientation theoryand on a system of coordinates adapted to its future use. The language that has been used for the simulation ofdynamics systems is Simulink. The indirect method of the field orientation control theory was used in themathematical analysis of the induction motor. The speed control of the induction motor was simulated using aFuzzy controller and these results were compared with those obtained by means of the use of a PI digitalcontroller.

  15. Control de un sistema eólico-fotovoltaico utilizando un controlador fuzzy; Control of a wind-photovoltaic system using a controller fuzzy

    Directory of Open Access Journals (Sweden)

    Alfredo G M Gámez López

    2011-02-01

    Full Text Available En este artículo, se prueba de manera virtual, un controlador basado en lógica difusa para un sistema híbrido degeneración de energía. La simulación digital emplea como herramienta el Labview, obteniéndose resultadosgráficos descriptivos de la acción del controlador, así como la interfaz gráfica representativa del comportamientodel sistema. In this article is tested a virtual controller using fuzzy logic for a hybrid system of power generation.LABVIEW is used as a digital simulation tool obtaining descriptive graphical results of the action of the driveras well as a graphical interface of the behavior of the system.

  16. Application of digital image processing for pot plant grading.

    NARCIS (Netherlands)

    Dijkstra, J.

    1994-01-01

    The application of digital image processing for grading of pot plants has been studied. Different techniques e.q. plant part identification based on knowledge based segmentation, have been developed to measure features of plants in different growth stage. Growth experiments were performed to identif

  17. The DigitalSeed: An Interactive Toy for Investigating Plants

    Science.gov (United States)

    Cherubini, Mauro; Gash, Hugh; McCloughlin, Thomas

    2008-01-01

    Plant growth, development and reproduction are fundamental concepts in biology; yet there is a recorded lack of motivation for young people to grapple with these concepts. Here we present the "DigitalSeed" toy for making investigations around these concepts more accessible to children through hands-on digital interaction. This is part of an…

  18. Measurement of solar extinction in tower plants with digital cameras

    Science.gov (United States)

    Ballestrín, J.; Monterreal, R.; Carra, M. E.; Fernandez-Reche, J.; Barbero, J.; Marzo, A.

    2016-05-01

    Atmospheric extinction of solar radiation between the heliostat field and the receiver is accepted as a non-negligible source of energy loss in the increasingly large central receiver plants. However, the reality is that there is currently no reliable measurement method for this quantity and at present these plants are designed, built and operated without knowing this local parameter. Nowadays digital cameras are used in many scientific applications for their ability to convert available light into digital images. Its broad spectral range, high resolution and high signal to noise ratio, make them an interesting device in solar technology. In this work a method for atmospheric extinction measurement based on digital images is presented. The possibility of defining a measurement setup in circumstances similar to those of a tower plant increases the credibility of the method. This procedure is currently being implemented at Plataforma Solar de Almería.

  19. Localization of equipment for digital plant protection system

    Energy Technology Data Exchange (ETDEWEB)

    Koo, I. S.; Park, H. Y.; Lee, C. K. and others

    2000-10-01

    The objective of this project lies on the development of design requirements, establishment of structure and manufacture procedures, development of the software verification and validation(V and V) techniques of the digital plant protection system. The functional requirements based on the analog protection system and digital design requirements are introduced, the processor and system bus for safety grade equipment are selected and the interface requirements and the design specification have been developed in order to manufacture the quick prototype of the digital plant protection system. The selection guidelines of parts, software development and coding and testing for digital plant protection system have been performed through manufacturing the quick prototype based on the developed design specification. For the software verification and validation, the software review plan and techniques of verification and validation have been researched. The digital validation system is developed in order to verify the quick prototype. The digital design requirements are reviewed by the software safety plan and V and V plans. The formal methods for verifying the safety-grade software are researched, then the methodology of formal analysis and testing have been developed.

  20. The DigitalSeed: an interactive toy for investigating plants

    OpenAIRE

    Cherubini, Mauro; Gash, Hugh; McCloughlin, Thomas

    2010-01-01

    Plant growth, development and reproduction are fundamental concepts in biology; yet there is a recorded lack of motivation for young people to grapple with these concepts. Here we present the ‘DigitalSeed’ toy for making investigations around these concepts more accessible to children through hands-on digital interaction. This is part of an on-going project investigating improved ways of learning involving digital media.To date, this project has addressed the learning of 4-5 year olds, but it...

  1. Controladores lógicos programables: PLC nivel avanzado

    OpenAIRE

    Zapata Madrigal, Germán Darío; Ramírez Piedrahita, Gustavo

    1993-01-01

    El curso avanzado de programación de controladores lógicos programables en STEP-5, para los equipos de la serie SIMATIC S5, pretende iniciar al participante en las características del procesador y aplicaciones avanzadas, disponibles en estos autómatas; los cuales son posibles gracias a las ventajas ofrecidas por el lenguaje de máquina. Se presentan inicialmente a modo de repaso unas aplicaciones, cuyo objetivo es nivelar los conceptos del primer curso. Posteriormente, se dedica un capit...

  2. Controlador empotrado en FPGA para Sistema Inteligente de Transporte

    Directory of Open Access Journals (Sweden)

    Alejandro José Cabrera Sarmiento

    2011-11-01

    Full Text Available 1024x768 Normal 0 21 false false false ES X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} En el presente trabajo se expone la concepción, desarrollo e implementación de un controlador empotrado en un FPGA de Xilinx para ser utilizado en un Sistema Inteligente de Transporte (SIT. La estructura hardware del controlador está basada en la utilización de diversos módulos de propiedad intelectual del sistema de procesamiento MicroBlaze y el soporte de software está basado en la utilización del sistema operativo Petalinux. El controlador empotrado dispone de interfaces Ethernet, USB, UART, SPI e I2C para la comunicación con los diferentes niveles jerárquicos del SIT. Ha sido implementado sobre una placa de desarrollo basada en un FPGA Spartan3E de 1.200 k compuertas, ocupando un 59% de sus recursos configurables. El resto de los recursos disponibles en el FPGA permite, además de la posible actualización del controlador, la implementación hardware de algoritmos que requieren una alta velocidad de procesamiento.

  3. Digitization and visualization of greenhouse tomato plants in indoor environments.

    Science.gov (United States)

    Li, Dawei; Xu, Lihong; Tan, Chengxiang; Goodman, Erik D; Fu, Daichang; Xin, Longjiao

    2015-02-10

    This paper is concerned with the digitization and visualization of potted greenhouse tomato plants in indoor environments. For the digitization, an inexpensive and efficient commercial stereo sensor-a Microsoft Kinect-is used to separate visual information about tomato plants from background. Based on the Kinect, a 4-step approach that can automatically detect and segment stems of tomato plants is proposed, including acquisition and preprocessing of image data, detection of stem segments, removing false detections and automatic segmentation of stem segments. Correctly segmented texture samples including stems and leaves are then stored in a texture database for further usage. Two types of tomato plants-the cherry tomato variety and the ordinary variety are studied in this paper. The stem detection accuracy (under a simulated greenhouse environment) for the cherry tomato variety is 98.4% at a true positive rate of 78.0%, whereas the detection accuracy for the ordinary variety is 94.5% at a true positive of 72.5%. In visualization, we combine L-system theory and digitized tomato organ texture data to build realistic 3D virtual tomato plant models that are capable of exhibiting various structures and poses in real time. In particular, we also simulate the growth process on virtual tomato plants by exerting controls on two L-systems via parameters concerning the age and the form of lateral branches. This research may provide useful visual cues for improving intelligent greenhouse control systems and meanwhile may facilitate research on artificial organisms.

  4. Digitization and Visualization of Greenhouse Tomato Plants in Indoor Environments

    Directory of Open Access Journals (Sweden)

    Dawei Li

    2015-02-01

    Full Text Available This paper is concerned with the digitization and visualization of potted greenhouse tomato plants in indoor environments. For the digitization, an inexpensive and efficient commercial stereo sensor—a Microsoft Kinect—is used to separate visual information about tomato plants from background. Based on the Kinect, a 4-step approach that can automatically detect and segment stems of tomato plants is proposed, including acquisition and preprocessing of image data, detection of stem segments, removing false detections and automatic segmentation of stem segments. Correctly segmented texture samples including stems and leaves are then stored in a texture database for further usage. Two types of tomato plants—the cherry tomato variety and the ordinary variety are studied in this paper. The stem detection accuracy (under a simulated greenhouse environment for the cherry tomato variety is 98.4% at a true positive rate of 78.0%, whereas the detection accuracy for the ordinary variety is 94.5% at a true positive of 72.5%. In visualization, we combine L-system theory and digitized tomato organ texture data to build realistic 3D virtual tomato plant models that are capable of exhibiting various structures and poses in real time. In particular, we also simulate the growth process on virtual tomato plants by exerting controls on two L-systems via parameters concerning the age and the form of lateral branches. This research may provide useful visual cues for improving intelligent greenhouse control systems and meanwhile may facilitate research on artificial organisms.

  5. Digital Counts of Maize Plants by Unmanned Aerial Vehicles (UAVs

    Directory of Open Access Journals (Sweden)

    Friederike Gnädinger

    2017-05-01

    Full Text Available Precision phenotyping, especially the use of image analysis, allows researchers to gain information on plant properties and plant health. Aerial image detection with unmanned aerial vehicles (UAVs provides new opportunities in precision farming and precision phenotyping. Precision farming has created a critical need for spatial data on plant density. The plant number reflects not only the final field emergence but also allows a more precise assessment of the final yield parameters. The aim of this work is to advance UAV use and image analysis as a possible high-throughput phenotyping technique. In this study, four different maize cultivars were planted in plots with different seeding systems (in rows and equidistantly spaced and different nitrogen fertilization levels (applied at 50, 150 and 250 kg N/ha. The experimental field, encompassing 96 plots, was overflown at a 50-m height with an octocopter equipped with a 10-megapixel camera taking a picture every 5 s. Images were recorded between BBCH 13–15 (it is a scale to identify the phenological development stage of a plant which is here the 3- to 5-leaves development stage when the color of young leaves differs from older leaves. Close correlations up to R2 = 0.89 were found between in situ and image-based counted plants adapting a decorrelation stretch contrast enhancement procedure, which enhanced color differences in the images. On average, the error between visually and digitally counted plants was ≤5%. Ground cover, as determined by analyzing green pixels, ranged between 76% and 83% at these stages. However, the correlation between ground cover and digitally counted plants was very low. The presence of weeds and blurry effects on the images represent possible errors in counting plants. In conclusion, the final field emergence of maize can rapidly be assessed and allows more precise assessment of the final yield parameters. The use of UAVs and image processing has the potential to

  6. Discussion about the effect of digital plants library on the plants landscape restoration in Yuanmingyuan

    Science.gov (United States)

    Bing, L.; Guxin, S.; Gongli, L.

    2015-08-01

    Chinese classical garden emphasizes not only the construction of building, mountains and rivers, spring and stone landscape but also the selection and configuration mode of the plant species. Yuanmingyuan, a classical work of Chinese garden art, is of both the magnificence of northern royal garden and the delicacy of southern private garden. The plants landscape in Yuanmingyuan also has its own unique style. But it is regretful that after several disasters, it nearly disappears just as other building clusters. The Re- Yuanmingyuan group re-presents the plants landscape of Yuanmingyuan through investigation, restoration and three-dimensional space generation, and makes proposal about the concept of digital plants library for the first time with the expectation to provide basic support for the digital restoration of cultural heritage by establishing the plants library. The paper also introduces the process of digital plants library system construction as well as the significance of the library construction for the landscape restoration in Yuanmingyuan and even the northern royal garden.

  7. Controlador borroso en un ondulador trifásico

    Directory of Open Access Journals (Sweden)

    Agustín Garzón Carbonell

    2011-02-01

    Full Text Available Se presenta la implementación de un controlador borroso diseñado para obtener un voltaje de salida de magnitudy frecuencia constantes, mediante un ondulador trifásico. Se plantea el diseño de los esquemas de potencia ycontrol. Es tratada igualmente la determinación de los valores de ciertos parámetros que se usarán para comprobarel funcionamiento del sistema: frecuencia de muestreo, conmutación, filtro de salida, para realizar experimentos.Se muestran y analizan los resultados obtenidos en las simulaciones para  cargas resistiva e inductiva.  The implementation of a fuzzy controller is presented, designed in order to obtaining a voltage of constant valueand fixed frequency, by means of a tree-phase inverter. The design of the power and control parts is shown,before detailing the characteristics of the architecture of the chosen inverter target of the control. The determina-tion of the values of certain parameters will be used to check the operation of the system is treated equally:sampling frequency, commutation, out filter, to carry out experiments.  They are shown and analyzed the resultsobtained in the simulations for R and L loads.

  8. Controlador de procesos con autoajuste de parámetros PID

    OpenAIRE

    Pérez Gil, Oscar

    2016-01-01

    En aquest projecte es porten a terme totes i cadascunes de les etapes necessàries per la realització d’un controlador de processos. Des de la anàlisis diversos controlador existents en el mercat y la comparació de diferents alternatives de confecció, fins el disseny i implementació de la solució mes favorable, tant hardware com software. A més, s’elabora un estudi econòmic dels costos que suposa la creació del controlador de processos, juntament amb el seu cost dintre d’un producció en sèr...

  9. Controlador en Modo Deslizante para Sistemas Fotovoltaicos Conectados a la Red Eléctrica

    Directory of Open Access Journals (Sweden)

    D. Arcos

    2012-11-01

    Full Text Available Se describe el análisis, modelamiento y diseño de un lazo de control para sistemas fotovoltaicos (PV conectados a la red eléctrica. Se aborda el modelado de un panel fotovoltaico; el diseño de un convertidor elevador (Boost y su lazo de control mediante un controlador proporcional-integral PI de corriente y un controlador en modo deslizante; y finalmente el diseño de un inversor DC-AC de una fase. Se realiza una descripción de la dinámica del convertidor Boost y de las ecuaciones para el diseño del controlador en modo deslizante y del inversor de una sola fase. El sistema propuesto ha sido simulado utilizando las herramientas de la librería SimPowerSystems de Matlab/Simulink.

  10. CONTROLADOR LÓGICO PROGRAMÁVEL UTILIZANDO PIC 18F4550

    OpenAIRE

    2012-01-01

    Desde a criação dos relés eletromecânicos os processos industriais vêm se modernizando, principalmente após a descoberta dos microprocessadores que impulsionaram o desenvolvimento dos controladores lógicos programáveis. Os controladores tornaram os processos produtivos flexíveis do ponto de vista de manutenção, expansão e principalmente aumentando a qualidade dos produtos e qualidade de vida dos envolvidos, já que esta tecnologia vem retirando os homens de processos insalubres e tornando este...

  11. CONTROLADOR LÓGICO PROGRAMÁVEL UTILIZANDO PIC 18F4550

    OpenAIRE

    Eleutério, Warley Alisson; C&W Projetos e consultoria / Projetista de sistemas elétricos e Automação; Hovadich, Wagner Antonio A.; IHM Engenharia / Projetista de sistemas de Automação; Braga, Eduardo Queiroz; Centro Universitário de Belo Horizonte / Professor

    2012-01-01

    Desde a criação dos relés eletromecânicos os processos industriais vêm se modernizando, principalmente após a descoberta dos microprocessadores que impulsionaram o desenvolvimento dos controladores lógicos programáveis. Os controladores tornaram os processos produtivos flexíveis do ponto de vista de manutenção, expansão e principalmente aumentando a qualidade dos produtos e qualidade de vida dos envolvidos, já que esta tecnologia vem retirando os homens de processos insalubres e tornando este...

  12. Practical Maintenance of Digital Systems: Guidance to Maximize the Benefits of Digital Technology for the Maintenance of Digital Systems and Plant Equipment

    Energy Technology Data Exchange (ETDEWEB)

    Hill, D; Scarola, K

    2004-10-30

    This report presents detailed guidance for the maintenance and testing of modern digital systems. The guidance provides practical means for plants to take advantage of the increased diagnostic and self-test capabilities of these systems. It helps plants avoid mistakes in design and installation that could lead to increased maintenance burden and decreased system reliability and availability.

  13. Safety and security aspects in design of digital safety I and C in nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Ding, Yongjian [University of Applied Sciences Magdeburg-Stendal, Magdeburg (Germany). Inst. of Electrical Engineering; Waedt, Karl [Areva GmbH, Erlangen (Germany). PEAS-G

    2016-05-15

    The paper describes a safety objective oriented systematic design approach of digital (computerized) safety I and C in modern nuclear power plants which considers the plant safety requirements as well as cybersecurity needs. The defence in depth philosophy is applied by using different defence lines in the I and C architecture and protection zones in the plant IT environment.

  14. PROVIDING PLANT DATA ANALYTICS THROUGH A SEAMLESS DIGITAL ENVIRONMENT

    Energy Technology Data Exchange (ETDEWEB)

    Bly, Aaron; Oxstrand, Johanna

    2017-06-01

    As technology continues to evolve and become more integrated into a worker’s daily routine in the Nuclear Power industry the need for easy access to data becomes a priority. Not only does the need for data increase but the amount of data collected increases. In most cases the data is collected and stored in various software applications, many of which are legacy systems, which do not offer any other option to access the data except through the application’s user interface. Furthermore the data gets grouped in “silos” according to work function and not necessarily by subject. Hence, in order to access all the information needed for a particular task or analysis one may have to access multiple applications to gather all the data needed. The industry and the research community have identified the need for a digital architecture and more importantly the need for a Seamless Digital Environment. An SDE provides a means to access multiple applications, gather the data points needed, conduct the analysis requested, and present the result to the user with minimal or no effort by the user. In addition, the nuclear utilities have identified the need for research focused on data analytics. The effort should develop and evaluate use cases for data mining and analytics for employing information from plant sensors and database for use in developing improved business analytics. Idaho National Laboratory is leading such effort, which is conducted in close collaboration with vendors, nuclear utilities, Institute of Nuclear Power Operations, and Electric Power Research Institute. The goal of the study is to research potential approaches to building an analytics solution for equipment reliability, on a small scale, focusing on either a single piece of equipment or a single system. The analytics solution will likely consist of a data integration layer, predictive and machine learning layer and the user interface layer that will display the output of the analysis in a straight

  15. Clonación artificial de controladores basados en técnicas de inteligencia artificial

    Directory of Open Access Journals (Sweden)

    Javier Antonio Ballesteros

    2004-11-01

    Full Text Available En el presente articulo se expone un avance de anteproyecto, sobre técnicas de inteligencia Artificial, su aplicación a procesos industriales y herramientas para realizar simulación. Se citan algunos trabajos en los cuales hay resultados, y que prestan un soporte lógico para continuar con el desarrollo del proyecto. Ademas, se analiza, la función que cumple el controlador el cual debe ser preciso, confiable y que a su vez reduzca costos. Por estas razones se tomó como base del proyecto un controlador que posea estas características para que se puedan aplicar técnicas de lnteligencia Artificial y poder realizar Ia colación artificial.

  16. Voltage controller design for air conditioning; Diseno de controlador de voltaje para aire acondicionado

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Andrade, R; Lopez Villalobos, J.J; Valderrama Chairez, J; Ramirez, R.L. [Instituto Tecnologico de Nuevo Leon, Guadalupe, Nuevo Leon (Mexico)]. E-mails: roxana_garciaandrade@yahoo.com; xe2n@yahoo.com.mx; jose.valderrama@ieee.org

    2013-03-15

    This paper discusses the design of a voltage controller for an air conditioning system in order to generate additional power in activation or startup of the system, for which as a first stage is presented the modeling power generation of electric current through alternative means, such as solar energy. The results of this study will be the basis for development of the physical prototype of this system controller. [Spanish] El presente trabajo trata sobre el diseno de un controlador de voltaje para un sistema de aire acondicionado con el fin de generar energia adicional en la activacion o arranque de dicho sistema, para lo cual como primer fase se presenta el modelado de la generacion de corriente electrica mediante medios alternos, como lo es la energia solar. Los resultados de este trabajo seran la base para desarrollo del prototipo fisico de este sistema controlador.

  17. Control de velocidad de un motor de CD con un controlador PID Wavenet

    Directory of Open Access Journals (Sweden)

    Abraham Christian Pedroza Araujo

    2014-01-01

    Full Text Available El controlador más utilizado actualmente en la industria es el controlador PID. Sin embargo, el algoritmo PID lineal tiene bajo desempeño cuando el proceso a controlar presenta dinámicas complejas como zonas muertas y características no lineales. El funcionamiento del controlador PID en general, se basa en la actuación en forma proporcional, integral y derivativa sobre la señal de error e(t, definida como e(t = yref(t - y(t, con la finalidad de efectuar la señal de control u(t que manipula la salida del proceso en forma deseada como se muestra la Figura 1. Figura 1. Esquema de un control clásico. Figura 1. Esquema de un control clásico. Las constantes kp ki kd son las ganancias del PID. Existen distintas técnicas analíticas y experimentales con el fin de sintonizar esas ganancias. Una alternativa a este problema de sintonización es el controlador PID wavenet, donde por medio de una wavenet y un filtro IIR se estima la salida del sistema a controlar, lo cual se utiliza para re-sintonizar las ganancias de un PID discreto, todo esto en línea. Esta es la alternativa que se emplea en el presente trabajo de investigación y enfocada a la simulación y control de un motor de cd obteniendo resultados.

  18. Controlador de velocidad de una máquina de continua

    OpenAIRE

    Ros Fernández, Joaquin Eduardo

    2015-01-01

    El objetivo principal de este proyecto concierne al desarrollo de un controlador de velocidad para una máquina de continua, tanto la potencia como la regulación del mismo. El motor que utilizaremos es una máquina de continua con la siguiente información: -Modelo MT-4525-BTYCN -Fabricante: Baldor Escuela Técnica Superior de Ingeniería Industrial Universidad Politécnica de Cartagena

  19. Controlador de velocidad de una máquina de continua

    OpenAIRE

    Ros Fernández, Joaquin Eduardo

    2015-01-01

    El objetivo principal de este proyecto concierne al desarrollo de un controlador de velocidad para una máquina de continua, tanto la potencia como la regulación del mismo. El motor que utilizaremos es una máquina de continua con la siguiente información: -Modelo MT-4525-BTYCN -Fabricante: Baldor Escuela Técnica Superior de Ingeniería Industrial Universidad Politécnica de Cartagena

  20. The Effect of a Digital Learning Environment on Children's Conceptions about the Protection of Endemic Plants

    Science.gov (United States)

    Petrou, Stella; Korfiatis, Konstantinos

    2013-01-01

    This study presents the results of a pilot learning intervention for improving children's ideas about plant protection. The research was executed in two phases. The first phase aimed at exploring children's ideas about plant protection. These ideas were taken into account for the design and development of a digital learning environment. The second…

  1. Linealización de sistemas VSC-HVDC para el diseño de un controlador PI vectorial

    Directory of Open Access Journals (Sweden)

    Nelson Díaz Aldana

    2014-01-01

    Full Text Available Los sistemas VSC-HVDC son muy utilizados para la transmisión de energía en redes de interconexión eléctrica. Uno de los principales problemas que poseen estos sistemas es la complejidad de su modelo matemático, lo que conlleva grandes dificultades para el diseño de controladores que permitan la regulación de parámetros como la tensión DC de transmisión, así como la potencia activa y reactiva del sistema VSC-HVDC. En este artículo se presenta la linealización de un sistema VSC-HVDC y el posterior diseño de un controlador lineal PI vectorial a partir del modelo linealizado. Adicionalmente, se proponen dos estrategias para la validación de este tipo de controladores, la primera consiste en un único controlador PI para regular los estados del sistema para cada VSC, la segunda consiste en el diseño de controladores PI vectoriales independientes para la regulación de cada estado del VSC.

  2. Digital Biomass Accumulation Using High-Throughput Plant Phenotype Data Analysis.

    Science.gov (United States)

    Rahaman, Md Matiur; Ahsan, Md Asif; Gillani, Zeeshan; Chen, Ming

    2017-09-01

    Biomass is an important phenotypic trait in functional ecology and growth analysis. The typical methods for measuring biomass are destructive, and they require numerous individuals to be cultivated for repeated measurements. With the advent of image-based high-throughput plant phenotyping facilities, non-destructive biomass measuring methods have attempted to overcome this problem. Thus, the estimation of plant biomass of individual plants from their digital images is becoming more important. In this paper, we propose an approach to biomass estimation based on image derived phenotypic traits. Several image-based biomass studies state that the estimation of plant biomass is only a linear function of the projected plant area in images. However, we modeled the plant volume as a function of plant area, plant compactness, and plant age to generalize the linear biomass model. The obtained results confirm the proposed model and can explain most of the observed variance during image-derived biomass estimation. Moreover, a small difference was observed between actual and estimated digital biomass, which indicates that our proposed approach can be used to estimate digital biomass accurately.

  3. Discussion on software aging management of nuclear power plant safety digital control system.

    Science.gov (United States)

    Liang, Huihui; Gu, Pengfei; Tang, Jianzhong; Chen, Weihua; Gao, Feng

    2016-01-01

    Managing the aging of digital control systems ensures that nuclear power plant systems are in adequate safety margins during their life cycles. Software is a core component in the execution of control logic and differs between digital and analog control systems. The hardware aging management for the digital control system is similar to that for the analog system, which has matured over decades of study. However, software aging management is still in the exploratory stage. Software aging evaluation is critical given the higher reliability and safety requirements of nuclear power plants. To ensure effective inputs for reliability assessment, this paper provides the required software aging information during the life cycle. Moreover, the software aging management scheme for safety digital control system is proposed on the basis of collected aging information.

  4. Human Reliability Analysis for Digitized Nuclear Power Plants: Case Study on the LingAo II Nuclear Power Plant

    Directory of Open Access Journals (Sweden)

    Yanhua Zou

    2017-03-01

    Full Text Available The main control room (MCR in advanced nuclear power plants (NPPs has changed from analog to digital control system (DCS. Operation and control have become more automated, centralized, and accurate due to the digitalization of NPPs, which has improved the efficiency and security of the system. New issues associated with human reliability inevitably arise due to the adoption of new accident procedures and digitalization of main control rooms in NPPs. The LingAo II NPP is the first digital NPP in China to apply the state-oriented procedure. In order to address issues related to human reliability analysis for DCS and DCS + state-oriented procedure, the Hunan Institute of Technology conducted a research project based on a cooperative agreement with the LingDong Nuclear Power Co. Ltd. This paper is a brief introduction to the project.

  5. Evaluación del desempeño de diversos controladores avanzados aplicados a un robot manipulador tipo SCARA

    Directory of Open Access Journals (Sweden)

    Elena Muñoz

    2011-01-01

    Full Text Available Este artículo presenta una evaluación del desempeño de varios controladores avanzados aplicados al control cartesiano de un robot manipulador de cuatro grados de libertad, tipo SCARA. Inicialmente se expresa el modelo dinámico del robot, para posteriormente implementar en simulación diversos tipos de controladores. Algunas simulaciones no están basadas en modelos como el PID; otras, en cambio, se basan en modelos como el control por par calculado, el control robusto, el control predictivo, el control PID multivariable y el control por modos deslizantes. Se realiza una evaluación del desempeño de estos controladores probando diversas trayectorias cartesianas de tipo industrial, así como sus respuestas ante perturbaciones y ante cambios en los valores de los parámetros dinámicos.

  6. An Overview of Risk Quantification Issues for Digitalized Nuclear Power Plants using a Static Fault Tree

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Hyun Gook; Kim, Man Cheol; Lee, Seung Jun; Lee, Ho Jung; Eom, Heung Seop; Chol, Jong Gyun; Jang, Seung Cheol [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2009-08-15

    Risk caused by safety-critical instrumentation and control (I and C) systems considerably affects overall plant risk. As digitalization of safety-critical systems in nuclear power plants progresses, a risk model of a digitalized safety system is required and must be included in a plant safety model in order to assess this risk effect on the plant. Unique features of a digital system cause some challenges in risk modeling. This article aims at providing an overview of the issues related to the development of a static fault-tree-based risk model. We categorize the complicated issues of digital system probabilistic risk assessment (PRA) into four groups based on their characteristics: hardware module issues, software issues, system issues, and safety function issues. Quantification of the effect of these issues dominates the quality of a developed risk model. Recent research activities for addressing various issues, such as the modeling framework of a software-based system, the software failure probability and the fault coverage of a self monitoring mechanism, are discussed. Although these issues are interrelated and affect each other, the categorized and systematic approach suggested here will provide a proper insight for analyzing risk from a digital system

  7. Asociaciones entre el estilo controlador del entrenador y el malestar de los jugadores de fútbol base

    OpenAIRE

    Mars Aicart, Mª Lidón

    2015-01-01

    Esta tesis doctoral titulada "Asociaciones entre el estilo controlador del entrenador y el malestar de los jugadores de fútbol base" se encuentra enmarcada dentro de un proyecto más amplio financiado por el Ministerio de Ciencia e Innovación, Dirección General de Programas y Transferencia de Conocimiento (DEP2009-12748). El objetivo principal de esta tesis ha sido examinar la relación entre la percepción de los deportistas del estilo controlador como antecedente, y la frustración de las n...

  8. 77 FR 50722 - Software Unit Testing for Digital Computer Software Used in Safety Systems of Nuclear Power Plants

    Science.gov (United States)

    2012-08-22

    ... COMMISSION Software Unit Testing for Digital Computer Software Used in Safety Systems of Nuclear Power Plants... regulatory guide (DG), DG-1208, ``Software Unit Testing for Digital Computer Software used in Safety Systems... entitled ``Software Unit Testing for Digital Computer Software Used in Safety Systems of Nuclear...

  9. Controladores digitales reconfigurables: Implementación a partir de Redes de Petri

    OpenAIRE

    Corti, Rosa Marina; Martínez, Roberto M.; Belmonte, Javier; Giandoménico, Enrique; D'Agostino, Estela

    2012-01-01

    La línea de investigación abarca diversos aspectos relacionados con el diseño, simulación e implementación de redes inalámbricas de sensores. En este contexto se aborda la temática de controladores digitales orientada al diseño del módulo de control de los nodos sensores. En la mayoría de las aplicaciones se utilizan microcontroladores, sin embargo, en algunos dominios los dispositivos de lógica reconfigurable resultan ventajosos. Por este motivo se trabaja en la implementación de controla...

  10. Sintonia de controladores baseada em Sistemas de Inferência Difusa

    OpenAIRE

    Pires, Nuno Filipe Lopes Agualusa

    2012-01-01

    Este trabalho de pesquisa e desenvolvimento tem como fundamento principal o Conceito de Controlo por Lógica Difusa. Utilizando as ferramentas do software Matlab, foi possível desenvolver um controlador com base na inferência difusa que permitisse controlar qualquer tipo de sistema físico real, independentemente das suas características. O Controlo Lógico Difuso, do inglês “Fuzzy Control”, é um tipo de controlo muito particular, pois permite o uso simultâneo de dados numéricos c...

  11. Estudo Comparativo de Controladores Fuzzy Aplicados a um Sistema Solar Fotovoltaico.

    OpenAIRE

    Carlos Antônio Pereira Tavares

    2009-01-01

    Neste trabalho apresenta-se o modelo de um controlador baseado em Lógica Fuzzy para um sistema de energia baseado em fonte renovável solar fotovoltaica (photovoltaic - PV) multi-string em operação isolada, para o aproveitamento da máxima potência desta fonte. O sistema é composto por painéis solares, conversor CC-CC tipo elevador de tensão (boost), armazenamento por banco de baterias, inversor trifásico e carga trifásica variável. O sistema fotovoltaico foi modelado no MATLAB/Simulink de form...

  12. Projeto de controladores PID para sistemas de segunda ordem sujeitos a retardo variante no tempo

    OpenAIRE

    Elder Pereira Fenili

    2015-01-01

    Esta dissertação apresenta uma metodologia para sintonia de controladores PID (Proporcional, Integral e Derivativo) para sistemas de segunda ordem sujeitos a retardo variante no tempo. O método baseia-se na teoria de Lyapunov-Krasovskii. Tal teoria, a partir da escolha de um funcional apropriado, permite tratar problemas de estabilidade de sistemas sujeitos a retardo no tempo. Neste trabalho foi escolhido um funcional que possui termos exponenciais, assim uma taxa de convergência, pré-definid...

  13. 78 FR 47011 - Software Unit Testing for Digital Computer Software Used in Safety Systems of Nuclear Power Plants

    Science.gov (United States)

    2013-08-02

    ... COMMISSION Software Unit Testing for Digital Computer Software Used in Safety Systems of Nuclear Power Plants..., ``Software Unit Testing for Digital Computer Software Used in Safety Systems of Nuclear Power Plants.'' This... software elements if those systems include software. This RG is one of six RG revisions addressing...

  14. Plant Collections Online: Using Digital Herbaria in Biology Teaching

    Science.gov (United States)

    Flannery, Maura C.

    2013-01-01

    Herbaria are collections of preserved plants specimens, some of which date back to the 16th century. They are essential to botanical research, especially in systematics. They can also be important historical documents. The collections of Lewis and Clark, Carolus Linnaeus, and Charles Darwin, to name a few, are primary sources for the study of…

  15. Monitoring plant condition and phenology using infrared sensitive consumer grade digital cameras

    NARCIS (Netherlands)

    Nijland, W.; de Jong, R.; de Jong, S.M.; Wulder, M.A.; Bater, C.W.; Coops, N.C.

    2014-01-01

    Consumer-grade digital cameras are recognized as a cost-effective method of monitoring plant health and phenology. The capacity to use these cameras to produce time series information contributes to a better understanding of relationships between environmental conditions, vegetation health, and prod

  16. Compensation Tuning of Analog and Digital Controllers for First Order Plus Time Delay Plants

    Directory of Open Access Journals (Sweden)

    Miluše VÍTEČKOVÁ

    2011-06-01

    Full Text Available The article is devoted to the simple compensation tuning of analog and digital PI and PID controllers for the first order plus time delay plants. The described method makes controller tuning possible so that the control process is non-oscillatory without an overshoot for all input variables. The use is shown in the example.

  17. Invensys solution for a complete digital I and C system upgrade for a nuclear power plant

    Energy Technology Data Exchange (ETDEWEB)

    Meter, L. [Invensys Process Systems, M/S C42-2A, 33 Commercial Street, Foxboro, MA 02035 (United States)

    2006-07-01

    Currently, Invensys is executing a number of digital I and C upgrade projects (both safety and non-safety related) at a number of US and overseas Nuclear Power Plants (NPP). In addition Invensys is in the final shipment stage of Lungmen, NPP project, where its scope consisted of Balance of Plant Distributed Control Information System (DCIS), including Plant Computer System (PCS). This article describes the approach and details of Invensys DCIS architecture, which is used in parts throughout various upgrade projects as well as in its entirety for a complete NPP DCIS. (authors)

  18. CONTROLE DE TEMPERATURA E MINIMIZAÇÃO DOS EFEITOS TRANSIENTES DE IMPUREZAS UTILIZANDO CONTROLADORES FUZZY EM UMA COLUNA DE DESTILAÇÃO INDUSTRIAL DE ALTA PUREZ

    OpenAIRE

    Lira, Jéssica Oliveira de Brito; Yanko, Walter; de Morais Júnior, Arioston Araújo; Oliveira, Talles Caio de Linhares; Brito, Romildo Pereira

    2017-01-01

    Com o avanço tecnológico recursos computacionais veem sendo aplicados em colunas de destilação, processo de grande consumo energético nas plantas industriais. Além do algoritmo clássico do controlador proporcional-integrativo-derivativo (PID), controladores inteligentes estão sendo aplicados na indústria devido à habilidade de tomada de decisão e capacidade de aprendizagem. Este trabalho apresenta uma estratégia para implementação de um controlador lógico fuzzy (FLC), minimizando os efeitos t...

  19. Reliability study: digital engineered safety feature actuation system of Korean Standard Nuclear Power Plant

    Energy Technology Data Exchange (ETDEWEB)

    Sudarno [National Nuclear Energy Agency, Batan (Indonesia); Kang, H. G.; Jang, S. C.; Eom, H. S.; Ha, J. J. [KAERI, Taejon (Korea, Republic of)

    2003-04-01

    The usage of digital Instrumentation and Control (I and C) in a nuclear power plant becomes more extensive, including safety related systems. The PSA application of these new designs are very important in order to evaluate their reliability. In particular, Korean Standard Nuclear Power Plants (KSNPPs), typically Ulchin 5 and 6 (UCN 5 and 6) reactor units, adopted the digital safety-critical systems such as Digital Plant Protection System (DPPS) and Digital Engineered Safety Feature Actuation System (DESFAS). In this research, we developed fault tree models for assessing the unavailability of the DESFAS functions. We also performed an analysis of the quantification results. The unavailability results of different DESFAS functions showed that their values are comprised from 5.461E-5 to 3.14E-4. The system unavailability of DESFAS AFAS-1 is estimated as 5.461E-5, which is about 27% less than that of analog system if we consider the difference of human failure probability estimation between both analyses. The results of this study could be utilized in risk-effect analysis of KSNPP. We expect that the safety analysis result will contribute to design feedback.

  20. Modeling and simulation of the feedwater system, associated controller and interface with the user for the SUN-RAH nucleo electric plants university student simulator; Modelado y simulacion del sistema de agua de alimentacion, controlador asociado e interfaz con el usuario para el simulador universitario de nucleoelectricas SUN-RAH

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez B, A. [Laboratorio de Analisis de Ingenieria de Reactores Nucleares, DEPFI Campus Morelos, en IMTA Jiutepec, Morelos (Mexico)]. e-mail: alitet@eresmas.com

    2003-07-01

    The simulation process of the component systems of the feedwater of a nucleo electric plant is presented, using several models of reduced order that represent the diverse elements that compose the systems like: the heaters of feedwater, the condenser, the feedwater pump, etc. The integration of the same ones in one simulative structure, and the development of a platform that to give the appearance of to be executed in continuous time, it is the objective of the feedwater simulator, as well as of the SUN-RAH simulator, of which is part. The simulator uses models of reduced order that respond to the observed behavior of a nuclear plant of BWR type. Likewise, it is presented a model of a flow controller of feedwater that will be the one in charge of regulating the demand of the system according to the characteristics and criticize restrictions of safety and controllability, assigned according to those wanted parameters of performance of this system inside the nucleo electric plant. The integration of these models, the adaptation of the variables and parameters, are presented in a way that the integration with the other ones models of the remaining systems of the plant (reactor, steam lines, turbine, etc.), be direct and coherent with the principles of thermodynamic cycles relative to this type of generation plants. The design of those graphic interfaces and the environment where the simulator works its are part of those developments of this work. The reaches and objectives of the simulator complement the description of the simulator. (Author)

  1. Suitability review of FMEA and reliability analysis for digital plant protection system and digital engineered safety features actuation system

    Energy Technology Data Exchange (ETDEWEB)

    Kim, I. S.; Kim, T. K.; Kim, M. C.; Kim, B. S.; Hwang, S. W.; Ryu, K. C. [Hanyang Univ., Seoul (Korea, Republic of)

    2000-11-15

    Of the many items that should be checked out during a review stage of the licensing application for the I and C system of Ulchin 5 and 6 units, this report relates to a suitability review of the reliability analysis of Digital Plant Protection System (DPPS) and Digital Engineered Safety Features Actuation System (DESFAS). In the reliability analysis performed by the system designer, ABB-CE, fault tree analysis was used as the main methods along with Failure Modes and Effect Analysis (FMEA). However, the present regulatory technique dose not allow the system reliability analysis and its results to be appropriately evaluated. Hence, this study was carried out focusing on the following four items ; development of general review items by which to check the validity of a reliability analysis, and the subsequent review of suitability of the reliability analysis for Ulchin 5 and 6 DPPS and DESFAS L development of detailed review items by which to check the validity of an FMEA, and the subsequent review of suitability of the FMEA for Ulchin 5 and 6 DPPS and DESFAS ; development of detailed review items by which to check the validity of a fault tree analysis, and the subsequent review of suitability of the fault tree for Ulchin 5 and 6 DPPS and DESFAS ; an integrated review of the safety and reliability of the Ulchin 5 and 6 DPPS and DESFAS based on the results of the various reviews above and also of a reliability comparison between the digital systems and the comparable analog systems, i.e., and analog Plant Protection System (PPS) and and analog Engineered Safety Features Actuation System (ESFAS). According to the review mentioned above, the reliability analysis of Ulchin 5 and 6 DPPS and DESFAS generally satisfies the review requirements. However, some shortcomings of the analysis were identified in our review such that the assumed test periods for several equipment were not properly incorporated in the analysis, and failures of some equipment were not included in the

  2. A REVIEW OF HUMAN-SYSTEM INTERFACE DESIGN ISSUES OBSERVED DURING ANALOG-TO-DIGITAL AND DIGITAL-TO-DIGITAL MIGRATIONS IN U.S. NUCLEAR POWER PLANTS

    Energy Technology Data Exchange (ETDEWEB)

    Kovesdi, C.; Joe, J.

    2017-05-01

    The United States (U.S.) Department of Energy (DOE) Light Water Reactor Sustainability (LWRS) program is developing a scientific basis through targeted research and development (R&D) to support the U.S. nuclear power plant (NPP) fleet in extending their existing licensing period and ensuring their long-term reliability, productivity, safety, and security. Over the last several years, human factors engineering (HFE) professionals at the Idaho National Laboratory (INL) have supported the LWRS Advanced Instrumentation, Information, and Control (II&C) System Technologies pathway across several U.S. commercial NPPs in analog-to-digital migrations (i.e., turbine control systems) and digital-to-digital migrations (i.e., Safety Parameter Display System). These efforts have included in-depth human factors evaluation of proposed human-system interface (HSI) design concepts against established U.S. Nuclear Regulatory Commission (NRC) design guidelines from NUREG-0700, Rev 2 to inform subsequent HSI design prior to transitioning into Verification and Validation. This paper discusses some of the overarching design issues observed from these past HFE evaluations. In addition, this work presents some observed challenges such as common tradeoffs utilities are likely to face when introducing new HSI technologies into NPP hybrid control rooms. The primary purpose of this work is to distill these observed design issues into general HSI design guidance that industry can use in early stages of HSI design.

  3. Migration of Older to New Digital Control Systems in Nuclear Power Plant Main Control Rooms

    Energy Technology Data Exchange (ETDEWEB)

    Kovesdi, Casey Robert [Idaho National Lab. (INL), Idaho Falls, ID (United States); Joe, Jeffrey Clark [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2016-04-01

    The United States (U.S.) Department of Energy (DOE) Office of Nuclear Energy (NE) has the primary mission to advance nuclear power by resolving socio-technical issues through research and development (R&D). One DOE-NE activity supporting this mission is the Light Water Reactor Sustainability (LWRS) program. LWRS has the overall objective to sustain the operation of existing commercial nuclear power plants (NPPs) through conducting R&D across multiple “pathways,” or R&D focus areas. The Advanced Instrumentation, Information, and Control (II&C) Systems Technologies pathway conducts targeted R&D to address aging and reliability concerns with the legacy instrumentation and control (I&C) and related information systems in operating U.S. NPPs. This work involves (1) ensuring that legacy analog II&C systems are not life-limiting issues for the LWR fleet, and (2) implementing digital II&C technology in a manner that enables broad innovation and business improvement in the NPP operating model. Under the LWRS Advanced II&C pathway, Human Factors experts at Idaho National Laboratory (INL) have been conducting R&D in support of NPP main control room (MCR) modernization activities. Work in prior years has focused on migrating analog I&C systems to new digital I&C systems (). In fiscal year 2016 (FY16), one new focus area for this research is migrating older digital I&C systems to new and advanced digital I&C systems. This report summarizes a plan for conducting a digital-to-digital migration of a legacy digital I&C system to a new digital I&C system in support of control room modernization activities.

  4. Development of Testing Platform for Digital I and C System in Nuclear Power Plants

    Energy Technology Data Exchange (ETDEWEB)

    Park, G. Y.; Kim, Y. M.; Jeong, C. H. [Korea Institute of Nuclear Safety, Daejeon (Korea, Republic of)

    2013-10-15

    According to digitalization of the NPP (Nuclear Power Plant) I and C (Instrumentation and Control) system, cyber threats against I and C system are increased. Moreover, the complexity of I and C system are increased due to adopt the up-to-date technologies (i. e., smart sensor, wireless network, and Field Programmable Gate Array / Complex Programmable Logic Device) into NPP's I and C system. For example, new issues such as cyber threat are introduced from digitalized I and C systems and components to replace obsolete analog equipment in existing NPPs. Furthermore, use of wireless communication, FPGA/CPLD, and smart sensor could introduce new considerations such as Defense-in-Depth and Diversity. Therefore, the proof testing for digital I and C system is required to verify the adverse effect from use of up-to-date digital technologies and identify the criteria to resolve and mitigate (or prevent) the (possibility of) effects. The objective of this study is developing the Testing Platform for the proof testing. The digital I and C System Test Platform is implemented using test platform hardware, component software, and architectural design. The digital I and C testing platform includes the safety-related PLC and relevant ladder logics, Windows-based C++ codes for host PC. For software, there are seven spike models to confirm the each module's functionality and generate/monitor the signals to/from PLCs. For future work, digital I and C System Test Platform architecture will be implemented using spike models. And a set of acceptance test against cyber security, smart sensor, wireless network, and FPGA/CPLD will be conducted using digital I and C System Test Platform.

  5. Digitization

    DEFF Research Database (Denmark)

    Finnemann, Niels Ole

    2014-01-01

    Processes of digitization have for years represented a major trend in the developments of modern society but have only recently been related to processes of mediatization. The purpose of this article is to look into the relation between the concepts of mediatization and digitization and to clarify...... what a concept of digital media might add to the understanding of processes of mediatization and what the concept of mediatization might add to the understanding of digital media. It is argued that digital media open an array of new trajectories in human communication, trajectories which were...... not anticipated in previous conceptualizations of media and mediatization. If digital media are to be included, the concept of mediatization has to be revised and new parameters are to be built into the concept of media. At the same time it is argued that the concept of mediatization still provides a variety...

  6. User centered design of a digital procedure guidance component for nuclear power plant operation

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Paulo V.R. de; Santos, Isaac L. dos; Oliveira, Mauro V. de; Grecco, Claudio H.S.; Mol, Antonio C. [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)]. E-mails: paulov@ien.gov.br; luquetti@ien.gov.br; mvitor@ien.gov.br; grecco@ien.gov.br; mol@ien.gov.br

    2007-07-01

    The use of nuclear power plants to produce electric energy is a safety-critical process where ultimate operational decisions still relies with the control room operators. Thus it is important to provide the best possible decision support through effective supervisory control interfaces. A user centered design approach, based on cognitive task analysis methods, was used to observe the operators training on the nuclear power plant simulator of the Human System Interface Laboratory (LABIHS). We noted deficiencies in the integration between the computerized interfaces and the hardcopy (paper) procedures. An new prototype of digital procedures - the digital procedure component guidance (PCG) - was designed in PowerPoint as an alternative to the current hardcopy procedure manuals. The design improves upon the graphical layout of system information and provides better integration of procedures, automation, and alarm systems. The design was validated by expert opinion and a scenario-based comparison. Future implementation and testing of the redesign is suggested for further validation. (author)

  7. Digital control systems in nuclear power plants: Failure information, modeling concepts, and applications

    Energy Technology Data Exchange (ETDEWEB)

    Galyean, W.J.

    1993-06-23

    This report briefly describes some current applications of advanced computerized digital display and control systems at US commercial nuclear power plants and presents the results of a literature search that was made to gather information on the reliability of these systems. Both hardware and software reliability were addressed in this review. Only limited failure rate information was found, with the chemical process industry being the primary source of information on hardware failure rates and expert opinion the primary source for software failure rates. Safety-grade digital control systems are typically installed on a functional like-for-like basis, replacing older analog systems without substantially changing interactions with other plant systems. Future work includes performing a limited probabilistic risk assessment of a representative DCS to assess its risk significance.

  8. Digital control systems in nuclear power plants: Failure information, modeling concepts, and applications. Revision 1

    Energy Technology Data Exchange (ETDEWEB)

    Galyean, W.J.

    1993-06-23

    This report briefly describes some current applications of advanced computerized digital display and control systems at US commercial nuclear power plants and presents the results of a literature search that was made to gather information on the reliability of these systems. Both hardware and software reliability were addressed in this review. Only limited failure rate information was found, with the chemical process industry being the primary source of information on hardware failure rates and expert opinion the primary source for software failure rates. Safety-grade digital control systems are typically installed on a functional like-for-like basis, replacing older analog systems without substantially changing interactions with other plant systems. Future work includes performing a limited probabilistic risk assessment of a representative DCS to assess its risk significance.

  9. Estrategias evolutivas para la adquisición de conocimiento en controladores borrosos temporales difuminados, aplicadas al encaminamiento adaptativo en redes de comunicaciones

    OpenAIRE

    Gadeo Martos, Manuel Ángel

    2009-01-01

    En esta tesis se presenta una metodología para mejorar las prestaciones de los algoritmos de encaminamiento adaptativos. El procedimiento propuesto está basado en el empleo sistemas borroso-genéticos evolutivos aplicados al encaminamiento adaptativo distribuido, en redes de comunicaciones de conmutación de paquetes. La metodología propuesta se puede descomponer en tres partes: 1.Desarrollo de los Controladores Borrosos Temporales Difuminados y Controladores Borrosos basados en Reglas Temporal...

  10. Seguidor solar adaptativo basado en un controlador lógico programable para paneles fotovoltaicos

    Directory of Open Access Journals (Sweden)

    Celso de la Cruz Casaño

    2012-12-01

    Full Text Available Objetivos: Desarrollar un sistema de seguimiento solar adaptativo para paneles solares fotovoltaicos que no necesitan una configuración inicial. Métodos: Se utilizó el método estructuralista, en el cual se observa la realidad, se construye modelos y se analiza la estructura. Se utilizaron bloques de programación del controlador lógico programable (PLC y de modelos de mecanismos para construir el modelo del seguidor solar; además se aplicó teorías de ingeniería de control como la estabilidad de sistemas dinámicos y control adaptativo. La prueba de estabilidad y el funcionamiento correcto se analiza utilizando todo el sistema en conjunto, luego, se validan estos análisis con las simulaciones y experimentaciones. Resultados: Se presentan resultados de simulación y experimentación, en los cuales se hace evidente que el controlador adaptativo mantiene el error de control de seguimiento muy bajo a pesar de las condiciones nubladas. En las simulaciones y experimentaciones no se requirió una configuración inicial; este hecho es uno de los requisitos que se busca alcanzar en los objetivos. La ventaja de la adaptación es que el seguidor solar seguirá la trayectoria del sol aun cuando este se encuentre oculto por las nubes. Conclusiones: El aporte fue brindar un diseño novedoso de un seguidor solar cronológico adaptativo. El algoritmo de control adaptativo evita la configuración inicial del seguidor solar cronológico.

  11. 77 FR 50720 - Test Documentation for Digital Computer Software Used in Safety Systems of Nuclear Power Plants

    Science.gov (United States)

    2012-08-22

    ... COMMISSION Test Documentation for Digital Computer Software Used in Safety Systems of Nuclear Power Plants... regulatory guide (DG), DG-1207, ``Test Documentation for Digital Computer Software used in Safety Systems of... revision endorses, with clarifications, the enhanced consensus practices for test documentation...

  12. Diseño e Implementación de los Algoritmos de Adaptación para Tres Parámetros de Un Controlador de Procesos de Alto Orden

    OpenAIRE

    Calleja Bernal Mendoza, Fernando

    2002-01-01

    En investigaciones anteriores a la presente, Narváez y Ramírez [1] desarrollaron un controlador de tres parámetros basado en modelos de segundo orden diseñado con la estructura IMC (controlador de modelo interno, por sus siglas en inglés). En este trabajo se proponen algoritmos de adaptación para los tres parámetros del controlador propuesto por Narváez y Ramírez, con el objetivo de tener un mejor desempeño del controlador y sustituir la necesidad de una sintonía. Los algoritmos que se propon...

  13. Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Singh, M.; Muljadi, E.; Gevorgian, V.

    2012-06-01

    The objective of this paper is to present test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility. In this paper, different types of wind power plant models based on the Western Electricity Coordinating Council Wind Generator Modeling Group's standardization efforts are implemented on a real-time digital simulator, and different test cases are used to gauge their grid integration capability. The low-voltage ride through and reactive power support capability and limitations of wind turbine generators under different grid conditions are explored. Several types of transient events (e.g., symmetrical and unsymmetrical faults, frequency dips) are included in the test cases. The differences in responses from different types of wind turbine are discussed in detail.

  14. Os sentidos e significados no trabalho de controlador de tráfego aéreo

    Directory of Open Access Journals (Sweden)

    Luciano Mendes

    2013-01-01

    Full Text Available O objetivo neste artigo foi compreender os sentidos e significados no trabalho de controlador de tráfego aéreo, elucidando sua importância para a segurança da população brasileira e considerando o destaque que a profissão recebeu na mídia a partir do problema do "apagão aéreo" no Brasil. Para tanto, de início, houve a necessidade de aprofundar algumas discussões teóricas sobre sentidos e significados do trabalho, com a intenção de entender aspectos relativos a esses conceitos. Após essas considerações teóricas, foi elucidado o percurso metodológico, destacando a modalidade de pesquisa, a maneira como foi executada, os sujeitos e o método de análise dos dados. Com esse percurso, foi possível, no tópico seguinte, entender os sentidos e significados do trabalho para os controladores entrevistados. Como conclusão, ficou evidente que, na profissão de controlador de tráfego aéreo, há, por exemplo, compatibilidade entre os anseios dos profissionais e as exigências da função.

  15. The Effect of a Digital Learning Environment on Children's Conceptions about the Protection of Endemic Plants

    Science.gov (United States)

    Petrou, Stella; Korfiatis, Konstantinos

    2013-01-01

    This study presents the results of a pilot learning intervention for improving children's ideas about plant protection. The research was executed in two phases. The first phase aimed at exploring children's ideas about plant protection. These ideas were taken into account for the design and development of a digital learning environment.…

  16. Simulation of Digital Control Computer of Nuclear Power Plant Based on Virtual Machine Technology

    Energy Technology Data Exchange (ETDEWEB)

    Hou, Xue Yan; Li, Shu; Li, Qing [China Nuclear Power Operation Technology Co., Wuhan (China)

    2011-08-15

    Based on analyzing DCC (Digital Control Computer) instruction sets, memory map, display controllers and I/O system, virtual machine of DCC (abbr. VM DCC) has been developed. The executive and control programs, same as running on NPP (Nuclear Power Plant) unit's DCC, can run on the VM DCC smoothly and get same control results. Dual VM DCC system has been successfully applied in NPP FSS(Full Scope Simulator) training. It not only improves FSS's fidelity but also makes maintaining easier.

  17. State-of-art report on digital I and C system reliability issues for nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, In Koo; Lee, Dong Gyoung; Cha, Kyung Ho; Kwon, Kee Choon [KAERI, Taejon (Korea, Republic of); Wood, Richard T. [ORNL, TN (United States)

    2000-01-01

    As the instrumentation and control (Iand C) equipment suppliers tend to provide digital components rather than conventional analog type components for instrument and control systems of nuclear power plants(NPPs), it is unavoidable to adopt digital equipment for safety I and C systems as well as non-safety systems. However, the full introduction of digital equipment to I and C systems of nuclear power plants raises several concerns which have not been considered for conventional analog I and C systems. The two major examples of the issues of digital systems are electromagnetic compatibility (EMC) and software reliability. KAERI invited a technical expert, Dr. Richard T. Wood, from Oak Ridge National Laboratory (ORNL) in Unites States and held seminars to recognize the state-of-art of the above issues and to share the information on techniques dealing with the problems. Dr. Wood has been working on the development of EMC guidelines and technical basis in using digital equipment for safety systems in nuclear power plants on the sponsorship of US Nuclear Regulatory Commission (NRC). Being based on his statements and discussions during his visit, this report describes technical considerations and issues on digital safety I and C system application in NPPs, EMC methods, environmental effects vulnerable to digital components, reliability assurance methods, etc. (author)

  18. Advanced Reactor Licensing: Experience with Digital I&C Technology in Evolutionary Plants

    Energy Technology Data Exchange (ETDEWEB)

    Wood, RT

    2004-09-27

    This report presents the findings from a study of experience with digital instrumentation and controls (I&C) technology in evolutionary nuclear power plants. In particular, this study evaluated regulatory approaches employed by the international nuclear power community for licensing advanced l&C systems and identified lessons learned. The report (1) gives an overview of the modern l&C technologies employed at numerous evolutionary nuclear power plants, (2) identifies performance experience derived from those applications, (3) discusses regulatory processes employed and issues that have arisen, (4) captures lessons learned from performance and regulatory experience, (5) suggests anticipated issues that may arise from international near-term deployment of reactor concepts, and (6) offers conclusions and recommendations for potential activities to support advanced reactor licensing in the United States.

  19. PROJETO DE UM CONTROLADOR PROPORCIONAL-INTEGRAL PARA O SISTEMA DE CONTROLE DE QUALIDADE DO AR E DE UM NOVO SISTEMA DE CONTROLE HVAC

    Directory of Open Access Journals (Sweden)

    Millene Caroline Albino de Oliveira

    2015-09-01

    Full Text Available Uma sala do Perlstein Hall, da Illinois Institute of Techonology, (Chicago, IL, USA possui um sistema de aquecimento, ventilação e ar condicionado (em inglês – HVAC equipado com um sensor de gás carbônico, cujo intuito é regular diretamente a qualidade do ar e assegurar que a sala esteja em condições aceitáveis. Este procedimento, porém, pode colocar uma carga extra no sistema HVAC e aumentar o consumo de energia. Desta forma, o objetivo principal do trabalho foi o desenvolvimento e a aplicação de uma estratégia de controle de temperatura e concentração de CO2 para o sistema em questão, utilizando um controlador Proporcional-Integral (PI. Dados coletados em testes realizados na sala foram utilizados para a estimação dos parâmetros das funções de transferência e dos controladores. Inicialmente, os controladores foram testados separadamente e, em seguida, em conjunto. Pode-se observar que o controlador PI obteve bons resultados, apesar do overshoot e oscilações do sistema já observados pela literatura, conseguindo atingir o set point desejado de temperatura de 70°F e de concentração de CO2 de 150 ppm. Palavras-chave: HVAC, Controle, controlador PI.

  20. Applying Human Factors Evaluation and Design Guidance to a Nuclear Power Plant Digital Control System

    Energy Technology Data Exchange (ETDEWEB)

    Thomas Ulrich; Ronald Boring; William Phoenix; Emily Dehority; Tim Whiting; Jonathan Morrell; Rhett Backstrom

    2012-08-01

    The United States (U.S.) nuclear industry, like similar process control industries, has moved toward upgrading its control rooms. The upgraded control rooms typically feature digital control system (DCS) displays embedded in the panels. These displays gather information from the system and represent that information on a single display surface. In this manner, the DCS combines many previously separate analog indicators and controls into a single digital display, whereby the operators can toggle between multiple windows to monitor and control different aspects of the plant. The design of the DCS depends on the function of the system it monitors, but revolves around presenting the information most germane to an operator at any point in time. DCSs require a carefully designed human system interface. This report centers on redesigning existing DCS displays for an example chemical volume control system (CVCS) at a U.S. nuclear power plant. The crucial nature of the CVCS, which controls coolant levels and boration in the primary system, requires a thorough human factors evaluation of its supporting DCS. The initial digital controls being developed for the DCSs tend to directly mimic the former analog controls. There are, however, unique operator interactions with a digital vs. analog interface, and the differences have not always been carefully factored in the translation of an analog interface to a replacement DCS. To ensure safety, efficiency, and usability of the emerging DCSs, a human factors usability evaluation was conducted on a CVCS DCS currently being used and refined at an existing U.S. nuclear power plant. Subject matter experts from process control engineering, software development, and human factors evaluated the DCS displays to document potential usability issues and propose design recommendations. The evaluation yielded 167 potential usability issues with the DCS. These issues should not be considered operator performance problems but rather opportunities

  1. NDVI derived from IR-enabled digital cameras: applicability across different plant functional types

    Science.gov (United States)

    Filippa, Gianluca; Cremonese, Edoardo; Galvagno, Marta; Migliavacca, Mirco; Sonnentag, Oliver; Hufkens, Koen; Ryu, Youngryel; Humphreys, Elyn; Morra di Cella, Umberto; Richardson, Andrew D.

    2017-04-01

    Phenological time-series based on the deployment of radiometric measurements are now being constructed at different spatial and temporal scales ranging from weekly satellite observations to sub-hourly in situ measurements by means of e.g. radiometers or digital cameras. In situ measurements are strongly required to provide high-frequency validation data for satellite-derived vegetation indices. In this study we used a recently developed method to calculate NDVI from NIR-enabled digital cameras (NDVIC) at 17 sites encompassing 6 plant functional types and totalizing 74 year-sites of data from the PHENOCAM network. The seasonality of NDVIC was comparable to both NDVI measured by ground light emitting diode (LED) sensors and by MODIS, whereas site-specific scaling factors are required to compare absolute values of NDVIC to standard NDVI measurements. We also compared green chromatic coordinate (GCC) extracted from RGB-only images to NDVIC and found that the two are characterized by slight different dynamics, dependent on the plant functional type. During senescence, NDVIC lags behind GCC in deciduous broad-leaf forests and grasslands, suggesting that GCC is more sensitive to leaf decoloration and NDVIC to the biomass reduction resulting from leaf abscission and green to dry biomass ratio of the canopy. In evergreen forests, NDVIC peaks later than GCC in spring, likely tracking the processes of shoot elongation and new needle formation. Our findings suggest therefore that NDVIC and GCC can complement each other in describing ecosystem phenology.

  2. Investigation of the impact of main control room digitalization on operators cognitive reliability in nuclear power plants.

    Science.gov (United States)

    Zhou, Yong; Mu, Haiying; Jiang, Jianjun; Zhang, Li

    2012-01-01

    Currently, there is a trend in nuclear power plants (NPPs) toward introducing digital and computer technologies into main control rooms (MCRs). Safe generation of electric power in NPPs requires reliable performance of cognitive tasks such as fault detection, diagnosis, and response planning. The digitalization of MCRs has dramatically changed the whole operating environment, and the ways operators interact with the plant systems. If the design and implementation of the digital technology is incompatible with operators' cognitive characteristics, it may have negative effects on operators' cognitive reliability. Firstly, on the basis of three essential prerequisites for successful cognitive tasks, a causal model is constructed to reveal the typical human performance issues arising from digitalization. The cognitive mechanisms which they impact cognitive reliability are analyzed in detail. Then, Bayesian inference is used to quantify and prioritize the influences of these factors. It suggests that interface management and unbalanced workload distribution have more significant impacts on operators' cognitive reliability.

  3. Herramienta para programar un controlador lógico programable basado en hardware reconfigurable

    Directory of Open Access Journals (Sweden)

    Valery Moreno Vega

    2011-09-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} El presente trabajo se basa en el desarrollo de una herramienta que permita programar un controlador lógico programable (PLC basado en hardware reconfigurable. El desarrollo de la aplicación está  sustentado por una de las metodologías ágiles descrita por XP, utilizando las técnicas de modelación establecidas por el Lenguaje Unificado de Modelado (UML y haciendo uso de una potente herramienta de programación y diseño de interfaces gráficas como es Qt. La programación del PLC se realiza mediante el lenguaje de escalera, atendiendo la norma IEC 61131-3.

  4. Controlador basado en variables de estado para un Brazo de dos grados de libertad.

    Directory of Open Access Journals (Sweden)

    Edgar Andrés Gutiérrez Cáceres

    2011-05-01

    Full Text Available Este artículo pretende hacer que el control de un brazo robótico con dos grados de libertad, se muestra todas las medidas para analizar el sistema de control y trabajar con variables de estado a partir de las ecuaciones describe el sistema. Inicialmente las ecuaciones son expresadas por una reducción o cambio de orden variable, a continuación, se procede a crear las matrices de variables de estado y, finalmente, determina si el sistema es controlable y observable, para simular en Simulink y luego determinar el comportamiento según el controlador aquí diseñado. Se muestra el continuo mejoramiento y la preocupación por las nuevas técnicas de análisis y sistemas elec trónicos, el grupo VITAL SIGNAL & CONTROL a tomado la iniciativa de utilizar técnicas de procesamiento y dar a conocer sus primeros avances.

  5. Quantitative digital imaging of banana growth suppression by plant parasitic nematodes.

    Directory of Open Access Journals (Sweden)

    Hugh Roderick

    Full Text Available A digital camera fitted with a hemispherical lens was used to generate canopy leaf area index (LAI values for a banana (Musa spp. field trial with the aim of establishing a method for monitoring stresses on tall crop plants. The trial in Uganda consisted of two cultivars susceptible to nematodes, a plantain, Gonja manjaya and an East African Highland banana, Mbwazirume, plus a nematode resistant dessert banana, Yangambi km5. A comparative approach included adding a mixed population of Radopholus similis, Helicotylenchus multicinctus and Meloidogyne spp. to the soil around half the plants of each cultivar prior to field planting. Measurements of LAI were made fortnightly from 106 days post-planting over two successive cropping cycles. The highest mean LAI during the first cycle for Gonja manjaya was suppressed to 74.8±3.5% by the addition of nematodes, while for Mbwazirume the values were reduced to 71.1±1.9%. During the second cycle these values were 69.2±2.2% and 72.2±2.7%, respectively. Reductions in LAI values were validated as due to the biotic stress by assessing nematode numbers in roots and the necrosis they caused at each of two harvests and the relationship is described. Yield losses, including a component due to toppled plants, were 35.3% and 55.3% for Gonja manjaya and 31.4% and 55.8% for Mbwazirume, at first and second harvests respectively. Yangambi km5 showed no decrease in LAI and yield in the presence of nematodes at both harvests. LAI estimated by hemispherical photography provided a rapid basis for detecting biotic growth checks by nematodes on bananas, and demonstrated the potential of the approach for studies of growth checks to other tall crop plants caused by biotic or abiotic stresses.

  6. Quantitative digital imaging of banana growth suppression by plant parasitic nematodes.

    Science.gov (United States)

    Roderick, Hugh; Mbiru, Elvis; Coyne, Danny; Tripathi, Leena; Atkinson, Howard J

    2012-01-01

    A digital camera fitted with a hemispherical lens was used to generate canopy leaf area index (LAI) values for a banana (Musa spp.) field trial with the aim of establishing a method for monitoring stresses on tall crop plants. The trial in Uganda consisted of two cultivars susceptible to nematodes, a plantain, Gonja manjaya and an East African Highland banana, Mbwazirume, plus a nematode resistant dessert banana, Yangambi km5. A comparative approach included adding a mixed population of Radopholus similis, Helicotylenchus multicinctus and Meloidogyne spp. to the soil around half the plants of each cultivar prior to field planting. Measurements of LAI were made fortnightly from 106 days post-planting over two successive cropping cycles. The highest mean LAI during the first cycle for Gonja manjaya was suppressed to 74.8±3.5% by the addition of nematodes, while for Mbwazirume the values were reduced to 71.1±1.9%. During the second cycle these values were 69.2±2.2% and 72.2±2.7%, respectively. Reductions in LAI values were validated as due to the biotic stress by assessing nematode numbers in roots and the necrosis they caused at each of two harvests and the relationship is described. Yield losses, including a component due to toppled plants, were 35.3% and 55.3% for Gonja manjaya and 31.4% and 55.8% for Mbwazirume, at first and second harvests respectively. Yangambi km5 showed no decrease in LAI and yield in the presence of nematodes at both harvests. LAI estimated by hemispherical photography provided a rapid basis for detecting biotic growth checks by nematodes on bananas, and demonstrated the potential of the approach for studies of growth checks to other tall crop plants caused by biotic or abiotic stresses.

  7. Diseño y simulación de un controlador PD difuso para el control de la velocidad de un motor de inducción

    Directory of Open Access Journals (Sweden)

    Harold René Chamorro Vera

    2010-01-01

    Full Text Available En este artículo se presenta el diseño y simulación de un controlador difuso para el control de la velocidad de un motor de inducción trifásico, basado en la arquitectura de control proporcional derivativa. La primera parte del artículo estudia las características del sistema motor-inversor, con el fin de obtener el conocimiento experto necesario para implementar el controlador difuso. En la segunda parte, a través de la herramienta computacional FIS de MatLab®, se diseña el controlador y se simula su rendimiento, mediante la realización de diferentes pruebas sobre la planta. Finalmente, se hace un comparativo con trabajos desarrollados previamente en esta temática y se presentan las conclusiones.

  8. Progress of nuclear safety for symbiosis and sustainability advanced digital instrumentation, control and information systems for nuclear power plants

    CERN Document Server

    Yoshikawa, Hidekazu

    2014-01-01

    This book introduces advanced methods of computational and information systems allowing readers to better understand the state-of-the-art design and implementation technology needed to maintain and enhance the safe operation of nuclear power plants. The subjects dealt with in the book are (i) Full digital instrumentation and control systems and human?machine interface technologies (ii) Risk? monitoring methods for large and? complex? plants (iii) Condition monitors for plant components (iv) Virtual and augmented reality for nuclear power plants and (v) Software reliability verification and val

  9. Grid de datos desarrollo con AngularJS utilizando el patrón Modelo Vista-Controlador

    OpenAIRE

    García Salinero, Mario

    2014-01-01

    Angrid es un componente software para la web que se basa en la tecnología AngularJS. Esta herramienta permitirá a un desarrollador web crear regillas para la visualización de datos con muy poco esfuerzo. El modelo Vista-Controlador utilizado por AngularJS y los estándares web utilizados para este proyecto lo hacen perfecto para el desarrollo de aplicaciones web y manejo de datos JSON. Angrid is a software component for the web that is based on the AngularJS technology. This tool will allow...

  10. Diseño de un controlador difuso supervisor para la regulación de un convertidor conmutado elevador

    Directory of Open Access Journals (Sweden)

    Spartacus Gomáriz

    2008-11-01

    Full Text Available En este trabajo, se diseña un controlador difuso del tipo Takagi-Sugeno-Kang (TSK para un regulador elevador conmu­tado DC-DC que opera a diferentes tensiones en estado estacionario. Este controlador realiza tareas de supervisión mediante su característica zonal. Por un lado, el controlador asigna diferentes leyes lineales de control acorde al valor de tensión de régimen estacionario y de los límites de aplicación a perturbación en pequeña señal. Por otra parte, el controlador asegura un arranque correcto para alcanzar el valor deseado de tensión de estado estacionario, por medio de una adecuada saturación del modulador de ancho de pulso (PWM de acuerdo con los principios de control en modo deslizamiento. Como resultado, se logra un comportamiento ecualizado en pequeña señal y un arranque controlado para diferentes tensiones de estado estacionario; por tanto, se amplían las características del regulador. Se presentan resultados de simulación y experimen­tales realizados sobre un regulador elevador controlado por corriente, operando sobre dos valores de tensión diferentes de estado estacionario que validan el diseño. / A complete design of a Takagi-Sugeno-Kang (TSK fuzzy controller for a PWM boost DC-DC switching regulator operating at different steady-state voltages is presented. This controller performs a supervisory role through its region characteristic. On the one hand, the controller assigns different linear control laws according to the steady-state voltage value and limits their application to small-signal perturbations. On the other hand, the controller ensures a proper start-up to reach the desired steady-state voltage by means of properly saturating the PWM according to sliding-mode control principles. As a result, both an equalized small-signal behavior and a controlled start-up are achieved for different steady-state voltages, thus extending the features of the regulator. Simulation and experimental results

  11. Diseño de un observador y un controlador de velocidad de un motor DC por modos deslizantes

    OpenAIRE

    Jesse Mauricio Beltrán Soto; Juan Diego Sánchez Torres

    2014-01-01

    En este artículo se presenta una estructura de estimación y control de estados mediante modos deslizantes para un modelo lineal. Se presenta un sistema mecánico de un Motor DC, al cual se le diseñaran un observador y un controlador deslizante de primer y segundo orden. Los resultados se comparan con un diseño de un PID. Los dos diseños se prueban ante cambios de referencia, perturbaciones y ruido.

  12. Diseño de un observador y un controlador de velocidad de un motor DC por modos deslizantes

    Directory of Open Access Journals (Sweden)

    Jesse Mauricio Beltrán Soto

    2014-07-01

    Full Text Available En este artículo se presenta una estructura de estimación y control de estados mediante modos deslizantes para un modelo lineal. Se presenta un sistema mecánico de un Motor DC, al cual se le diseñaran un observador y un controlador deslizante de primer y segundo orden. Los resultados se comparan con un diseño de un PID. Los dos diseños se prueban ante cambios de referencia, perturbaciones y ruido.

  13. Programación de Controladores Lógicos (PLC) mediante Ladder y Lenguaje de Control Estructurado (SCL) en MATLAB

    OpenAIRE

    Heyder David Páez-Logreira; Ronald Zamora-Musa; José Bohórquez-Pérez

    2015-01-01

    Existen diferentes lenguajes de programación de Controladores Lógicos Programables (PLC), el más común de ellos es el lenguaje de programación gráfico para autómatas programables llamado LADDER. Sin embargo, el lenguaje LADDER no es amigable en programas que requieren de cálculos de ecuaciones matemáticas, por ejemplo, el cálculo del volumen de un tanque en un control de nivel. Lenguajes alternativos como el Lenguaje de Control Estructurado (SCL) son menos estudiados dada su complejidad y poc...

  14. Programación de Controladores Lógicos (PLC) mediante Ladder y Lenguaje de Control Estructurado (SCL) en MATLAB

    OpenAIRE

    Heyder David Páez-Logreira; Ronald Zamora-Musa; José Bohórquez-Pérez

    2015-01-01

    Existen diferentes lenguajes de programación de Controladores Lógicos Programables (PLC), el más común de ellos es el lenguaje de programación gráfico para autómatas programables llamado LADDER. Sin embargo, el lenguaje LADDER no es amigable en programas que requieren de cálculos de ecuaciones matemáticas, por ejemplo, el cálculo del volumen de un tanque en un control de nivel. Lenguajes alternativos como el Lenguaje de Control Estructurado (SCL) son menos estudiados dada su complejidad y poc...

  15. Método para mapeamento de locos controladores de características oligogênicas Genetic mapping of oligogenic traits using maximum likehood functions

    Directory of Open Access Journals (Sweden)

    Rodrigo Barros Rocha

    2010-02-01

    Full Text Available Características oligogênicas de distribuição discreta e expressão governada por poucos genes de maior efeito têm se mostrado importantes na condução dos programas de melhoramento, com destaque para a resposta de resistência das plantas às doenças. Métodos tradicionais de detecção de QTL's, que pressupõem normalidade e herança governada por múltiplos fatores, não deveriam ser utilizados para mapeamento dessas características de distribuição discreta e interação epistática predominante. O objetivo deste trabalho é avaliar os resultados de um método para mapeamento e detecção de locos controladores da expressão de características oligogênicas, OTL's (Oligogenic Trait Loci. Esse método, definido como MMCO (Método de Mapeamento de Características Oligogênicas, utiliza funções de verossimilhança para obtenção de estimativas de ligação fatorial entre locos marcadores e locos controladores de características oligogênicas. Os resultados indicam que o método foi adequado para detecção de OTL's em populações F2 relativamente pequenas, compostas por 200 indivíduos, e que a determinação a priori do padrão de herança é condição necessária para a utilização dessa estratégia, que se diferencia por atender as pressuposições de análise, não necessitar de informação prévia de ordenamento entre as marcas e por permitir a obtenção de estimativas a partir da informação contida em todas as classes genotípicas.Oligogenic traits are distinguished by their heritage ruled by higher effect genes and by their importance for cultivated plants, with emphasis to the plant disease resistance inheritance. The qualitative nature and epistatic interaction of these traits results in a heritage pattern that should not be interpreted through traditional QTL detection strategies. The objective of this work was to propose a method for Oligogenic Traits Loci (OTL detection. This method, defined as Oligogenic Trait

  16. Accurate measurement of transgene copy number in crop plants using droplet digital PCR.

    Science.gov (United States)

    Collier, Ray; Dasgupta, Kasturi; Xing, Yan-Ping; Hernandez, Bryan Tarape; Shao, Min; Rohozinski, Dominica; Kovak, Emma; Lin, Jeanie; de Oliveira, Maria Luiza P; Stover, Ed; McCue, Kent F; Harmon, Frank G; Blechl, Ann; Thomson, James G; Thilmony, Roger

    2017-06-01

    Genetic transformation is a powerful means for the improvement of crop plants, but requires labor- and resource-intensive methods. An efficient method for identifying single-copy transgene insertion events from a population of independent transgenic lines is desirable. Currently, transgene copy number is estimated by either Southern blot hybridization analyses or quantitative polymerase chain reaction (qPCR) experiments. Southern hybridization is a convincing and reliable method, but it also is expensive, time-consuming and often requires a large amount of genomic DNA and radioactively labeled probes. Alternatively, qPCR requires less DNA and is potentially simpler to perform, but its results can lack the accuracy and precision needed to confidently distinguish between one- and two-copy events in transgenic plants with large genomes. To address this need, we developed a droplet digital PCR-based method for transgene copy number measurement in an array of crops: rice, citrus, potato, maize, tomato and wheat. The method utilizes specific primers to amplify target transgenes, and endogenous reference genes in a single duplexed reaction containing thousands of droplets. Endpoint amplicon production in the droplets is detected and quantified using sequence-specific fluorescently labeled probes. The results demonstrate that this approach can generate confident copy number measurements in independent transgenic lines in these crop species. This method and the compendium of probes and primers will be a useful resource for the plant research community, enabling the simple and accurate determination of transgene copy number in these six important crop species. Published 2017. This article is a U.S. Government work and is in the public domain in the USA.

  17. Fuzzy controller of speed-power of a synchronous micro generator; Controlador difuso de velocidad-potencia de un microgenerador sincrono

    Energy Technology Data Exchange (ETDEWEB)

    Martinez Alvarado, Raziel

    2002-11-01

    This thesis shows the design and implementation of a speed-power fuzzy-logic controller. The controller implementation was carried out on the Schrage motor-synchronous generator set. The synchronous alternator is rated 7 kVA, 220 V, 1800 rpm, 60 Hz. Two PI like fuzzy-logic controllers were developed with 9 and 25 rules. The controllers use the speed or power error and its integral as input variables and as an output the control signal from the brush-positioner of the Schrage motor. At the controller design stage, the anfis (adaptive-network-based fuzzy inference system) learning and structure procedure was used for tuning up parameters of the membership functions used on the designed fuzzy controllers. These controllers are first-order Sugeno-type. The designed controllers were tested on the motor-generator set under loaded and no-loaded conditions. It was found that PI-9 rules fuzzy-logic controller had better performance on both operating conditions. [Spanish] En este trabajo de tesis se presenta el diseno e implementacion de un controlador difuso de velocidad-potencia, para un grupo motor Schrage-generador sincrono de 7 kVA, 220 V, 1800 rpm, 60 Hz. Se implementaron controladores difusos del tipo PI de 9 y 25 reglas. Estos controladores utilizan como variables de entrada el error y la integral del error, de velocidad o potencia segun corresponda, y como variable de salida la senal de control del posicionador de las escobillas del motor Schrage. En la etapa de diseno de los controladores, se utilizo la estructura y el procedimiento de aprendizaje anfis (Sistema de Inferencia Difuso Basado en Redes Adaptables, por sus siglas en ingles) para sintonizar los parametros de las funciones de membresia de los controladores difusos, los cuales son del tipo Sugeno de primer orden. Con la finalidad de validar los controladores disenados, se realizaron pruebas experimentales al grupo motor-generador en condiciones de vacio y carga. Se encontro que el controlador difuso tipo

  18. Engineering development of a digital replacement protection system at an operating US PWR nuclear power plant: Installation and operational experiences

    Energy Technology Data Exchange (ETDEWEB)

    Miller, M.H. [Duke Power Co., Seneca, SC (United States)

    1995-04-01

    The existing Reactor Protection Systems (RPSs) at most US PWRs are systems which reflect 25 to 30 year-old designs, components and manufacturing techniques. Technological improvements, especially in relation to modern digital systems, offer improvements in functionality, performance, and reliability, as well as reductions in maintenance and operational burden. The Nuclear power industry and the US nuclear regulators are poised to move forward with the issues that have slowed the transition to modern digital replacements for nuclear power plant safety systems. The electric utility industry is now more than ever being driven by cost versus benefit decisions. Properly designed, engineered, and installed digital systems can provide adequate cost-benefit and allow continued nuclear generated electricity. This paper describes various issues and areas related to an ongoing RPS replacement demonstration project which are pertinant for a typical US nuclear plant to consider cost-effective replacement of an aging analog RPS with a modern digital RPS. The following subject areas relative to the Oconee Nuclear Station ISAT{trademark} Demonstrator project are discussed: Operator Interface Development; Equipment Qualification; Validation and Verification of Software; Factory Testing; Field Changes and Verification Testing; Utility Operational, Engineering and Maintenance; Experiences with Demonstration System; and Ability to operate in parallel with the existing Analog RPS.

  19. An epifluorescent attachment improves whole-plant digital photography of Arabidopsis thaliana expressing red-shifted green fluorescent protein

    Science.gov (United States)

    Baker, Stokes S.; Vidican, Cleo B.; Cameron, David S.; Greib, Haittam G.; Jarocki, Christine C.; Setaputri, Andres W.; Spicuzza, Christopher H.; Burr, Aaron A.; Waqas, Meriam A.; Tolbert, Danzell A.

    2012-01-01

    Background and aims Studies have shown that levels of green fluorescent protein (GFP) leaf surface fluorescence are directly proportional to GFP soluble protein concentration in transgenic plants. However, instruments that measure GFP surface fluorescence are expensive. The goal of this investigation was to develop techniques with consumer digital cameras to analyse GFP surface fluorescence in transgenic plants. Methodology Inexpensive filter cubes containing machine vision dichroic filters and illuminated with blue light-emitting diodes (LED) were designed to attach to digital single-lens reflex (SLR) camera macro lenses. The apparatus was tested on purified enhanced GFP, and on wild-type and GFP-expressing arabidopsis grown autotrophically and heterotrophically. Principal findings Spectrum analysis showed that the apparatus illuminates specimens with wavelengths between ∼450 and ∼500 nm, and detects fluorescence between ∼510 and ∼595 nm. Epifluorescent photographs taken with SLR digital cameras were able to detect red-shifted GFP fluorescence in Arabidopsis thaliana leaves and cotyledons of pot-grown plants, as well as roots, hypocotyls and cotyledons of etiolated and light-grown plants grown heterotrophically. Green fluorescent protein fluorescence was detected primarily in the green channel of the raw image files. Studies with purified GFP produced linear responses to both protein surface density and exposure time (H0: β (slope) = 0 mean counts per pixel (ng s mm−2)−1, r2 > 0.994, n = 31, P < 1.75 × 10−29). Conclusions Epifluorescent digital photographs taken with complementary metal-oxide-semiconductor and charge-coupled device SLR cameras can be used to analyse red-shifted GFP surface fluorescence using visible blue light. This detection device can be constructed with inexpensive commercially available materials, thus increasing the accessibility of whole-organism GFP expression analysis to research laboratories and teaching institutions with

  20. A New Digital Imaging and Analysis System for Plant and Ecosystem Phenological Studies

    Science.gov (United States)

    Ramirez, G.; Ramirez, G. A.; Vargas, S. A., Jr.; Luna, N. R.; Tweedie, C. E.

    2015-12-01

    Over the past decade, environmental scientists have increasingly used low-cost sensors and custom software to gather and analyze environmental data. Included in this trend has been the use of imagery from field-mounted static digital cameras. Published literature has highlighted the challenge scientists have encountered with poor and problematic camera performance and power consumption, limited data download and wireless communication options, general ruggedness of off the shelf camera solutions, and time consuming and hard-to-reproduce digital image analysis options. Data loggers and sensors are typically limited to data storage in situ (requiring manual downloading) and/or expensive data streaming options. Here we highlight the features and functionality of a newly invented camera/data logger system and coupled image analysis software suited to plant and ecosystem phenological studies (patent pending). The camera has resulted from several years of development and prototype testing supported by several grants funded by the US NSF. These inventions have several unique features and functionality and have been field tested in desert, arctic, and tropical rainforest ecosystems. The system can be used to acquire imagery/data from static and mobile platforms. Data is collected, preprocessed, and streamed to the cloud without the need of an external computer and can run for extended time periods. The camera module is capable of acquiring RGB, IR, and thermal (LWIR) data and storing it in a variety of formats including RAW. The system is full customizable with a wide variety of passive and smart sensors. The camera can be triggered by state conditions detected by sensors and/or select time intervals. The device includes USB, Wi-Fi, Bluetooth, serial, GSM, Ethernet, and Iridium connections and can be connected to commercial cloud servers such as Dropbox. The complementary image analysis software is compatible with all popular operating systems. Imagery can be viewed and

  1. Digital I&C Systems in Nuclear Power Plants. Risk-Screening of Environmental Stressors and a Comparison of Hardware Unavailability With an Existing Analog System

    Science.gov (United States)

    1998-01-01

    NUREG /CR-6579 BNL- NUREG -52536 Digital I&C Systems in Nuclear Power Plants Risk-Screening of Environmental Stressors and a Comparison of Hardware...13.2.3 NUREG /CR-6579 BNL- NUREG -52536 Digital I&C Systems in Nuclear Power Plants Risk-Screening of Environmental Stressors and a Comparison of...licensee documents and correspondence. The following documents in the NUREG series are available for purchase from the Government Printing Office: formal

  2. Diseño y evaluación de un controlador de posición óptimo para electromecanismo multivariable

    OpenAIRE

    Henry Bory-Prevez; Francisco Chang-Mumañ; Jorge Esteban Santos-Toural

    2016-01-01

    En este artículo se presenta el diseño de un controlador óptimo lineal cuadrático (LQR) para un sistema electromecánico multivariable. Se comienza modelando matemáticamente al sistema electromecánico obteniéndose una descripción en el espacio de estado. Luego se chequea la condición de controlabilidad del modelo matemático y se diseña el controlador LQR en el que se incrementa en dos el orden del sistema para incluir acción integral con estructura anti-saturación (anti-windup) por cálculo h...

  3. Diseño y evaluación de un controlador de posición óptimo para electromecanismo multivariable

    OpenAIRE

    Henry Bory-Prevez; Francisco Chang-Mumañ; Jorge Esteban Santos-Toural

    2016-01-01

    En este artículo se presenta el diseño de un controlador óptimo lineal cuadrático (LQR) para un sistema electromecánico multivariable. Se comienza modelando matemáticamente al sistema electromecánico obteniéndose una descripción en el espacio de estado. Luego se chequea la condición de controlabilidad del modelo matemático y se diseña el controlador LQR en el que se incrementa en dos el orden del sistema para incluir acción integral con estructura anti-saturación (anti-windup) por cálculo h...

  4. The virtual digital nuclear power plant: A modern tool for supporting the lifecycle of VVER-based nuclear power units

    Science.gov (United States)

    Arkadov, G. V.; Zhukavin, A. P.; Kroshilin, A. E.; Parshikov, I. A.; Solov'ev, S. L.; Shishov, A. V.

    2014-10-01

    The article describes the "Virtual Digital VVER-Based Nuclear Power Plant" computerized system comprising a totality of verified initial data (sets of input data for a model intended for describing the behavior of nuclear power plant (NPP) systems in design and emergency modes of their operation) and a unified system of new-generation computation codes intended for carrying out coordinated computation of the variety of physical processes in the reactor core and NPP equipment. Experiments with the demonstration version of the "Virtual Digital VVER-Based NPP" computerized system has shown that it is in principle possible to set up a unified system of computation codes in a common software environment for carrying out interconnected calculations of various physical phenomena at NPPs constructed according to the standard AES-2006 project. With the full-scale version of the "Virtual Digital VVER-Based NPP" computerized system put in operation, the concerned engineering, design, construction, and operating organizations will have access to all necessary information relating to the NPP power unit project throughout its entire lifecycle. The domestically developed commercial-grade software product set to operate as an independently operating application to the project will bring about additional competitive advantages in the modern market of nuclear power technologies.

  5. An analysis of Technical Security Control Requirements For Digital I and C Systems in Nuclear Power Plants

    Energy Technology Data Exchange (ETDEWEB)

    Song, Jaegu; Lee, Jungwoon; Park, Geeyong; Kwon, Keechoon; Lee, Dongyoung; Lee, Cheolkwon [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2013-10-15

    Instrumentation and control systems in nuclear power plants have been digitalized for the purpose of maintenance and precise operation. This digitalization, however, brings out issues related to cyber security. In the most recent past, international standard organizations, regulatory institutes, and research institutes have performed a number of studies addressing these systems cyber security. In order to provide information helpful to the system designers in their application of cyber security for the systems, this paper presents methods and considerations to define attack vectors in a target system, to review and select the requirements in the Regulatory Guide 5.71, and to integrate the results to identify applicable technical security control requirements. In this study, attack vectors are analyzed through the vulnerability analyses and penetration tests with a simplified safety system, and the elements of critical digital assets acting as attack vectors are identified. Among the security control requirements listed in Appendices B and C to Regulatory Guide 5.71, those that should be implemented into the systems are selected and classified in groups of technical security control requirements using the results of the attack vector analysis. For the attack vector elements of critical digital assets, all the technical security control requirements are evaluated to determine whether they are applicable and effective, and considerations in this evaluation are also discussed. The technical security control requirements in three important categories of access control, monitoring and logging, and encryption are derived and grouped according to the elements of attack vectors as results for the sample safety system.

  6. UTILIZACIÓN DEL SUBPRODUCTO DE FIQUE: LICOR VERDE, COMO CONTROLADOR DE PLAGAS EN EL CULTIVO DE REPOLLO (Brassica oleracea DO FIQUE SUBPRODUTOS UTILIZAÇÃO: LICOR VERDE COMO UM CONTROLADOR DE PRAGAS NA CULTURA DO REPOLHO (Brassica oleracea FIQUE SUBPRODUCT UTILIZATION: GREEN LIQUOR AS A PEST CONTROL IN THE CULTURE OFCABBAGE (Brassica oleracea

    Directory of Open Access Journals (Sweden)

    JHON F. IMBACHÍ-HOYOS

    2012-06-01

    Full Text Available En el vivero forestal 'La Florida' de la Corporación Autónoma Regional del Cauca CRC, se evaluó el efecto del extracto de fique (Furcraea sp como controlador de plagas en el cultivo de repollo (Brassica oleracea. Se utilizaron cuatro tratamientos (blanco, solución extracto de fique al 30% v/v, 20% v/v, 10% v/v. Las mediciones se hicieron durante seis semanas para vigor, altura, diámetro, daño por plagas y daño por enfermedades. La aplicación fue de una vez durante las tres primeras semanas; y las tres siguientes la aplicación fue de dos por semana. Los resultados se analizaron utilizando el paquete estadístico SPSS 11.5, se realizó una ANOVA con un nivel de confianza del 95% (p = 0,05 y una prueba de Tuckey. El análisis muestra que la aplicación del extracto dos veces por semana (extracto de fique al 30% v/v, presentó el mejor control de plagas, disminuyendo la presencia de daños por las plagas: mariposa blanca (Pieris sp. palomilla (Plutella xylostella y áfidos (Brevicoryne brassicae y Myzus persicae.No viveiro floresta 'La Florida' da Corporação Autônoma Regional do Cauca (CRC se abalizou o efeito do extrato de fique (Furcraea sp como controlador de plagas no cultivo de repolho (Brassica oleracea. Utilizarão- se quatro tratamentos (Branco, solução extrato de fique a 30% v/v, 20% v/v e 10% v/v. As medições fizeram-se durante seis semanas para vigor, altura, diâmetro, dano por pragas y dano por enfermidades. A aplicação foi de uma vez durante as três primeiras semanas; y as três seguintes a aplicação foi de duas por semanas. Os resultados analisaram-se utilizando o paquete estadístico SPSS 11.5, realizaram-se uma ANOVA com um nível de confiança dos 95% (p = 0,05 e uma proba de Tuckey. A análise mostra que a aplicação do extrato duas vezes por semana (extrato de fique a 30% v/v, apresentou o melhor controle de pragas reduzindo a presencia de danos por as pragas: Borboleta branca (Pieris sp, mariposa (Plutella

  7. Digital Full-Scope Simulation of a Conventional Nuclear Power Plant Control Room, Phase 2: Installation of a Reconfigurable Simulator to Support Nuclear Plant Sustainability

    Energy Technology Data Exchange (ETDEWEB)

    Ronald L. Boring; Vivek Agarwal; Kirk Fitzgerald; Jacques Hugo; Bruce Hallbert

    2013-03-01

    The U.S. Department of Energy’s Light Water Reactor Sustainability program has developed a control room simulator in support of control room modernization at nuclear power plants in the U.S. This report highlights the recent completion of this reconfigurable, full-scale, full-scope control room simulator buildout at the Idaho National Laboratory. The simulator is fully reconfigurable, meaning it supports multiple plant models developed by different simulator vendors. The simulator is full-scale, using glasstop virtual panels to display the analog control boards found at current plants. The present installation features 15 glasstop panels, uniquely achieving a complete control room representation. The simulator is also full-scope, meaning it uses the same plant models used for training simulators at actual plants. Unlike in the plant training simulators, the deployment on glasstop panels allows a high degree of customization of the panels, allowing the simulator to be used for research on the design of new digital control systems for control room modernization. This report includes separate sections discussing the glasstop panels, their layout to mimic control rooms at actual plants, technical details on creating a multi-plant and multi-vendor reconfigurable simulator, and current efforts to support control room modernization at U.S. utilities. The glasstop simulator provides an ideal testbed for prototyping and validating new control room concepts. Equally importantly, it is helping create a standardized and vetted human factors engineering process that can be used across the nuclear industry to ensure control room upgrades maintain and even improve current reliability and safety.

  8. Diseño y evaluación de un controlador de posición óptimo para electromecanismo multivariable

    Directory of Open Access Journals (Sweden)

    Henry Bory-Prevez

    2016-01-01

    Full Text Available En este artículo se presenta el diseño de un controlador óptimo lineal cuadrático (LQR para un sistema electromecánico multivariable. Se comienza modelando matemáticamente al sistema electromecánico obteniéndose una descripción en el espacio de estado. Luego se chequea la condición de controlabilidad del modelo matemático y se diseña el controlador LQR en el que se incrementa en dos el orden del sistema para incluir acción integral con estructura anti-saturación (anti-windup por cálculo hacía atrás. Los parámetros de sintonía del controlador LQR, matrices Q y R, se determinan empleando Algoritmo Genético usando como función de ajuste la integral de la suma de los valores absolutos de los errores de seguimiento a referencias en formas de escalón. Finalmente se evalúa vía simulación el desempeño del control diseñado ante cambios en la referencia y la utilidad de la estructura anti-saturación.

  9. Mapping soil deformation around plant roots using in vivo 4D X-ray Computed Tomography and Digital Volume Correlation.

    Science.gov (United States)

    Keyes, S D; Gillard, F; Soper, N; Mavrogordato, M N; Sinclair, I; Roose, T

    2016-06-14

    The mechanical impedance of soils inhibits the growth of plant roots, often being the most significant physical limitation to root system development. Non-invasive imaging techniques have recently been used to investigate the development of root system architecture over time, but the relationship with soil deformation is usually neglected. Correlative mapping approaches parameterised using 2D and 3D image data have recently gained prominence for quantifying physical deformation in composite materials including fibre-reinforced polymers and trabecular bone. Digital Image Correlation (DIC) and Digital Volume Correlation (DVC) are computational techniques which use the inherent material texture of surfaces and volumes, captured using imaging techniques, to map full-field deformation components in samples during physical loading. Here we develop an experimental assay and methodology for four-dimensional, in vivo X-ray Computed Tomography (XCT) and apply a Digital Volume Correlation (DVC) approach to the data to quantify deformation. The method is validated for a field-derived soil under conditions of uniaxial compression, and a calibration study is used to quantify thresholds of displacement and strain measurement. The validated and calibrated approach is then demonstrated for an in vivo test case in which an extending maize root in field-derived soil was imaged hourly using XCT over a growth period of 19h. This allowed full-field soil deformation data and 3D root tip dynamics to be quantified in parallel for the first time. This fusion of methods paves the way for comparative studies of contrasting soils and plant genotypes, improving our understanding of the fundamental mechanical processes which influence root system development.

  10. AN ANALYSIS OF TECHNICAL SECURITY CONTROL REQUIREMENTS FOR DIGITAL I&C SYSTEMS IN NUCLEAR POWER PLANTS

    Directory of Open Access Journals (Sweden)

    JAE-GU SONG

    2013-10-01

    Full Text Available Instrumentation and control systems in nuclear power plants have been digitalized for the purpose of maintenance and precise operation. This digitalization, however, brings out issues related to cyber security. In the most recent past, international standard organizations, regulatory institutes, and research institutes have performed a number of studies addressing these systems cyber security. In order to provide information helpful to the system designers in their application of cyber security for the systems, this paper presents methods and considerations to define attack vectors in a target system, to review and select the requirements in the Regulatory Guide 5.71, and to integrate the results to identify applicable technical security control requirements. In this study, attack vectors are analyzed through the vulnerability analyses and penetration tests with a simplified safety system, and the elements of critical digital assets acting as attack vectors are identified. Among the security control requirements listed in Appendices B and C to Regulatory Guide 5.71, those that should be implemented into the systems are selected and classified in groups of technical security control requirements using the results of the attack vector analysis. For the attack vector elements of critical digital assets, all the technical security control requirements are evaluated to determine whether they are applicable and effective, and considerations in this evaluation are also discussed. The technical security control requirements in three important categories of access control, monitoring and logging, and encryption are derived and grouped according to the elements of attack vectors as results for the sample safety system.

  11. Controlador de Tráfico Inteligente con Prelación para Vehículos de Emergencia

    Directory of Open Access Journals (Sweden)

    Robinson Jiménez Moreno

    2012-06-01

    Full Text Available Este artículo presenta el desarrollo de un controlador de tráfico por lógica difusa, elcual mediante el análisis de secuencias de video y por medio de técnicas deprocesamiento de imagen, es capaz de distinguir y gestionar de manera autónoma ycentralizada el flujo vehicular en un grupo de intersecciones a fin de dar prelación en la vía a vehículos de emergencias. El sistema emplea un algoritmo de clasificación entrenado para detectar los vehículos presentes en una escena y un algoritmo de procesamiento de imagen que permite identificar si alguno de ellos corresponde o no, a un vehículo de emergencia. Usando la información proveniente de las secuencias de video adquiridas mediante cámaras CCD ubicadas en lasintersecciones, el sistema selecciona la secuencia de acciones que prioricen el flujovehicular dentro de la zona de control, y que permitan descongestionar las posibles vías de desplazamiento del vehículo de emergencia. Los resultados obtenidos muestran que el sistema es capaz de realizar la detección vehicular en tiempo real yque además permite adaptar rápida y eficientemente los cambios de flujo a fin de establecer una vía prioritaria.   El sistema emplea un algoritmo

  12. Diseño de controladores para un convertidor flayback, operando en modo interconectado a red, para aplicaciones fotovoltaicas

    Directory of Open Access Journals (Sweden)

    César Leonardo Trujillo Rodríguez

    2012-01-01

    Full Text Available En este artículo se presenta el modelado de un convertidor flyback integrado en un microinversor fotovoltaico de dos etapas con conexión a red, y el diseño de los controladores respectivos. La idea es obtener el modeló dinámico del convertidord DC/DC con el fin de implementar un tipo de control que permita operar corno fuente de corriente y a su vez permita regular la tensión de entrada, con base en señal resultado del algoritmo de localización del punto de máxima potencia. Dicho esquema de control es novedoso y ha sido documentado por algunos autores utilizando convertidores tipo boost. Por lo tanto, el gran aporte del presente artículo, radica en la utilización de este novedoso esquema para aprovechar la máxima energía proveniente de los paneles, empleando un convertidor que posee la característica de aislar galvánicamente la generación del resto del circuito. Para validar el funcionamiento del flyback bajo estudio, se llevaron a cabo simulaciones en PSIMTM. Finalmente se presentan las conclusiones.

  13. Programación de Controladores Lógicos (PLC mediante Ladder y Lenguaje de Control Estructurado (SCL en MATLAB

    Directory of Open Access Journals (Sweden)

    Heyder David Páez-Logreira

    2015-05-01

    Full Text Available Existen diferentes lenguajes de programación de Controladores Lógicos Programables (PLC, el más común de ellos es el lenguaje de programación gráfico para autómatas programables llamado LADDER. Sin embargo, el lenguaje LADDER no es amigable en programas que requieren de cálculos de ecuaciones matemáticas, por ejemplo, el cálculo del volumen de un tanque en un control de nivel. Lenguajes alternativos como el Lenguaje de Control Estructurado (SCL son menos estudiados dada su complejidad y poca popularidad en la pequeña y mediana industria. En este artículo se compara los resultados del lenguaje de programación LADDER y el lenguaje SCL generado mediante la herramienta Simulink® PLC Coder de MATLAB® tomando como caso de estudio el cálculo de volumen de un tanque. Finalmente, este trabajo demuestra que la herramienta Simulink® PLC Coder presenta una alternativa de desarrollo más eficiente.

  14. Control Difuso Adaptivo y su Aplicación a una Planta Piloto de Secado por Lecho Fluidizado Adaptive Fuzzy Control with an Application to a Fluidized Dryer Bed Pilot Plant

    Directory of Open Access Journals (Sweden)

    I. Velásquez

    2005-01-01

    Full Text Available En el presente trabajo, se muestra el diseño e implementación de un controlador difuso proporcional-prealimentado con Mecanismo de Adaptación (CDPP-MA para regular la temperatura en el interior del de un secador por lecho fluidizado. El algoritmo del controlador difuso se programa en el “Script” de Intouch, mientras que para diseñar y configurar los diferentes parámetros del controlador difuso se utiliza el software Matlab. Las pruebas se llevaron a cabo en una Planta Piloto e incluyeron cambios en la referencia del controlador y la aplicación de perturbaciones al sistema. El controlador presenta buen desempeño, tanto en el seguimiento de la referencia como en la atenuación de las perturbaciones. Los resultados indican que el controlador implementado es una alternativa factible de ser usado en el control de procesos no lineales o fuertemente perturbados.This work presents the design and implementation of a feed-forward proportional fuzzy controller with an adaptation mechanism (CDPP-MA. This controller was designed for temperature feedback control in a fluidized bed reactor. The fuzzy controller algorithm is programmed in Intouch’s Script language. Matlab software was used for the design and configuration of the fuzzy controller’s parameters. Experimental tests were carried out in a pilot plant and included changes of reference of the controller and applications of disturbances to the system. Excellent performance was obtained with the controller, both in following the reference and in attenuation of the disturbances. The results show the implemented controller to be a feasible alternative to for use in control of highly non-linear or strongly disturbed processes

  15. Digital Sensor Technology

    Energy Technology Data Exchange (ETDEWEB)

    Ted Quinn; Jerry Mauck; Richard Bockhorst; Ken Thomas

    2013-07-01

    The nuclear industry has been slow to incorporate digital sensor technology into nuclear plant designs due to concerns with digital qualification issues. However, the benefits of digital sensor technology for nuclear plant instrumentation are substantial in terms of accuracy, reliability, availability, and maintainability. This report demonstrates these benefits in direct comparisons of digital and analog sensor applications. It also addresses the qualification issues that must be addressed in the application of digital sensor technology.

  16. Development of digital library system on regulatory documents for nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Lee, K. H.; Kim, K. J.; Yoon, Y. H.; Kim, M. W.; Lee, J. I. [KINS, Taejon (Korea, Republic of)

    2001-10-01

    The main objective of this study is to establish nuclear regulatory document retrieval system based on internet. With the advancement of internet and information processing technology, information management patterns are going through a new paradigm. Getting along the current of the time, it is general tendency to transfer paper-type documents into electronic-type documents through document scanning and indexing. This system consists of nuclear regulatory documents, nuclear safety documents, digital library, and information system with index and full text.

  17. Digital imagery: a simple approach to study plant responses to drought

    Science.gov (United States)

    Ahrends, H. E.; Etzold, S.; Jeanneret, F.; Eugster, W.; Wanner, H.; Buchmann, N.

    2009-04-01

    Different tree species show diverse responses to changing environmental conditions. Since these responses give deeper insight in ecosystem functionality suitable observation techniques are needed. Recent studies have demonstrated the successful application of digital camera imagery for phenological monitoring in ecosystem studies. However, the use of daily imagery from standard RGB cameras to observe species-specific responses of vegetation on environmental impacts has not been tested yet. We therefore studied possibilities and limitations of applying camera imagery of a mixed forest in the observation of tree-specific responses to drought stress. A digital camera was mounted on the uppermost platform of a fluxtower at the CarboEurope site Lägeren (northern Switzerland). Since 2005 the camera provides daily imagery of the forest canopy which is mainly consisting of beech and ash trees. Based on the image color values a vegetation index was computed. Time series of the vegetation index were jointly analyzed with meteorological data and eddy covariance measurements of ecosystem carbon dioxide and water vapour exchange. Changing environmental conditions caused changes in the images color values, therefore meteorological data and carbon dioxide exchange data were significantly correlated with the index values. A drought period in early summer 2006 influenced index values for beech but not for the highly drought-tolerant ash trees. We conclude that digital imagery provides a cost-effective, nondestructive and objective technique to study species-specific vegetation responses to drought stress and provide useful data that can be integrated in forest ecosystem models.

  18. Projeto de controladores baseados em LMIs: realimentação derivativa e sistemas chaveados utilizando estrutura variável

    OpenAIRE

    Cardim, Rodrigo

    2009-01-01

    Neste trabalho são apresentados estudos teóricos, projetos de controladores e simulações numéricas de alguns sistemas de controle automáticos, que no decorrer das pesquisas geraram novas contribuições. Primeiramente foi feito um breve estudo sobre os sistemas fuzzy Takagi- Sugeno (TS) e realizadas algumas simulações envolvendo exemplos acadêmicos como o sistema bola-viga e o levitador magnético. Em decorrência desses estudos foi proposto um novo método para o controle de sistemas mecânicos nã...

  19. Control adaptativo por modelo de referencia para un inversor basado en LCL con Síntesis de Controlador Mínima

    OpenAIRE

    Larco Barros, Ciro Mauricio; Costa Castelló, Ramon; Olm Miras, Josep Maria

    2016-01-01

    Un Control Adaptativo por Modelo de Referencia MRAC con Síntesis de Controlador Mínima MCS, es desarrollado con el objetivo de controlar un Inversor monofásico basado en un Filtro LCL conectado a la Red Eléctrica y adaptar el inductor de la red, que es un parámetro desconocido y que generá incertidumbre, manteniendo las prestaciones y la robustez del sistema. Para ello primero se revisarán los algoritmos de MRAC y MCS, y en función de estos se muestran todos los pasos a seguir y los co...

  20. Armónicas en Rectificadores Trifásicos y Disminución de Sobrevoltajes Transitorios en Controladores de Corriente Directa

    OpenAIRE

    Sánchez Viveros, Luis A.

    2004-01-01

    La electrónica de potencia ha ayudando a implementar procesos de producción más eficientes en la industria, sin embargo, provoca disturbios eléctricos que se tienen que limitar o bien se debe proteger todas las cargas sensibles de sus efectos. El presente trabajo muestra cómo se puede mitigar dos problemas de calidad de energía eléctrica, armónicas y sobre voltajes transitorios, en aplicaciones como rectificadores trifásicos y controladores de velocidad. Cuando hablamos de armónicas nos refer...

  1. Diseño e implementación de un controlador difuso tolerante a falla, aplicado al control de nivel de líquido

    OpenAIRE

    Criollo Ayala, Edgar Augusto

    2015-01-01

    La presente investigación describe el diseño e implementación de un controlador de ganancias programadas con lógica difusa, tolerante a falla, para el sistema de control de nivel de líquido MPS PA Compact Workstation, que dispone la Universidad Politécnica Salesiana. This paper describes the design and implementation of a gain scheduled controller with fuzzy logic, fault-tolerant, for the control system fluid level MPS PA Compact Workstation, which provides the Universidad Politécnica Sale...

  2. Investigations on the change of texture of plant cells due to preservative treatments by digital holographic microscopy

    Science.gov (United States)

    Vora, Priyanka; Anand, Arun

    2014-10-01

    Texture change is observed in preserved fruits and vegetables. Responsible factors for texture change during preservative treatments are cell morphology, cell wall structure, cell turger, water content and some biochemical components, and also the environmental conditions. Digital Holographic microscopy (DHM) is a quantitative phase contrast imaging technique, which provides three dimensional optical thickness profiles of transparent specimen. Using DHM the morphology of plant cells preserved by refrigeration or stored in vinegar or in sodium chloride can be obtained. This information about the spatio-temporal evolution of optical volume and thickness can be an important tool in area of food processing. Also from the three dimensional images, the texture of the cell can be retrieved and can be investigated under varying conditions.

  3. Uso de controlador PID como tecnologia eficiente em sistema de aquecimento de creche suína

    Directory of Open Access Journals (Sweden)

    Juliana de S. G. Barros

    2015-05-01

    Full Text Available O uso racional de energia elétrica em creches suínas pode ser viabilizado sem afetar o desempenho produtivo dos animais visando à sustentabilidade do setor razão por que o objetivo deste trabalho foi avaliar a eficiência de duas tecnologias de controle de temperatura em sistema de aquecimento resistivo em creche suína, no uso de energia elétrica e no ganho de peso dos leitões. Os sistemas avaliados foram: resistências elétricas suspensas com controle PID (proporcional, integral e derivativo e resistências elétricas suspensas com termostato. O experimento foi realizado durante o período de inverno, entre maio e setembro de 2013. Os critérios de comparação foram: consumo de energia elétrica (kWh, consumo específico (kWh kg-1, custo específico (R$ kg-1, indicador de eficiência elétrica no aquecimento, ganho de peso (kg e ganho de peso diário (kg d-1. O sistema de aquecimento com controlador PID, apesar de apresentar maior consumo médio, foi mais eficiente quanto ao uso de energia elétrica para produzir 1 kg de peso vivo (2,88 kWh kg-1, quanto ao custo específico (0,75 R$ kg-1 e quanto ao ganho de peso dos leitões (7,3 kg em comparação com o sistema com termostato (3,98 kWh kg-1, 1,03 R$ kg-1 e 5,2 kg, respectivamente.

  4. Accurate measurement of transgene copy number in crop plants using droplet digital PCR

    Science.gov (United States)

    Technical abstract: Genetic transformation is a powerful means for the improvement of crop plants, but requires labor and resource intensive methods. An efficient method for identifying single copy transgene insertion events from a population of independent transgenic lines is desirable. Currently ...

  5. Accurate measure of transgene copy number in crop plants using droplet digital PCR

    Science.gov (United States)

    Genetic transformation is a powerful means for the improvement of crop plants, but requires labor- and resource-intensive methods. An efficient method for identifying single-copy transgene insertion events from a population of independent transgenic lines is desirable. Currently, transgene copy numb...

  6. Digital I&C systems in nuclear power plants. Risk-screening of environmental stressors and a comparison of hardware unavailability with an existing analog system

    Energy Technology Data Exchange (ETDEWEB)

    Hassan, M.; Vesely, W.E.

    1998-01-01

    In this report, we present a screening study to identify environmental stressors for digital instrumentation and control (I&C) systems in a nuclear power plant (NPP) which can be potentially risk-significant, and compare the hardware unavailability of such a system with that of its existing analog counterpart. The stressors evaluated are temperature, humidity, vibration, radiation, electro-magnetic interference (EMI), and smoke. The results of risk-screening for an example plant, subject to some bounding assumptions and based on relative changes in plant risk (core damage frequency impacts of the stressors), indicate that humidity, EMI from lightning, and smoke can be potentially risk-significant. Risk from other sources of EMI could not be evaluated for a lack of data. Risk from temperature appears to be insignificant as that from the assumed levels of vibrations. A comparison of the hardware unavailability of the existing analog Safety Injection Actuation System (SIAS) in the example plant with that of an assumed digital upgrade of the system indicates that system unavailability may be more sensitive to the level of redundancy in elements of the digital system than to the environmental and operational variations involved. The findings of this study can be used to focus activities relating to the regulatory basis for digital I&C upgrades in NPPs, including identification of dominant stressors, data-gathering, equipment qualification, and requirements to limit the effects of environmental stressors. 30 refs., 8 figs., 26 tabs.

  7. Diseño de un controlador de intensidad luminosa para una máquina de insolación

    Directory of Open Access Journals (Sweden)

    Javier Eduardo Martínez Baquero

    2017-01-01

    Full Text Available El presente documento muestra el diseño de un controlador para una máquina de insolación usada en procesos de fotocurado. Para ello se inició el desarrollo realizando una revisión previa minuciosa a la máquina de insolación existente, y a los procedimientos que se deben llevar a cabo en el laboratorio de estampados, con el fin de comprender el proceso de fotocurado, evaluando las posibilidades de mejora de los equipos en uso. El diseño propuesto para el controlador es un PI, el cual se realizó con herramientas de simulación de Matlab, dando prioridad al tiempo de exposición en el proceso de fotocurado el cual debe ser el mismo para cualquier tipo de tela o malla del bastidor, lo cual permite que la máquina de insolación no requiera ser operada por personal altamente calificado o competente en este arte.

  8. A maximum power point tracker for photovoltaic system using a PIC microcontroller; Controlador de potencia maxima para sistemas fotovoltaicos (SFVs) utilizando un microcontrolador PIC

    Energy Technology Data Exchange (ETDEWEB)

    Guzman, Eusebio; Mendoza, Victor X; Carrillo, Jose J . A; Galarza, Cristian [Universidad Autonoma Metropolitana, Mexico, D.F. (Mexico)

    2000-07-01

    A maximum power point tracker MPPT for photovoltaic systems is presented. The equipment can output up to 600 W and its control signals are generated by a PIC microcontroller. The principle of control is based on current and voltage sampling at the output terminals of the photovoltaic generator. From power comparison of two consecutive samples, it is possible to know how far from the optimal point the system is working. Output voltage control is used to force the system to work within the optimal area of operation. The microcontroller program sequence, the DC/DC converter structure and the most relevant results are shown. [Spanish] En este trabajo se presenta el desarrollo de un controlador de potencia maxima para su aplicacion en sistemas fotovoltaicos (SFVs). El diseno alcanza una potencia de 600 W y sus senales de control son generadas con un controlador PIC. El principio de control se basa en el muestreo de la corriente y la tension en las terminadas del generador fotovoltaico GFV. De dos muestreos consecutivos, y por comparacion de las potencias, se determina que tan alejado del punto optimo opera el sistema. La operacion del sistema dentro de la zona de funcionamiento optimo se asegura mediante un control por tension. Se muestra la secuencia de programacion del microcontrolador, la estructura del convertidor CD/CD empleado y algunos resultados relevantes.

  9. Application of Phase Shifting Projection Moire on Solid Regular Figures and Plant Organs Three Dimensional Digital Model Generation

    Science.gov (United States)

    Lino, A. C. L.; Dal Fabbro, I. M.

    2008-04-01

    The conception of a tridimensional digital model of solid figures and plant organs started from topographic survey of virtual surfaces [1], followed by topographic survey of solid figures [2], fruit surface survey [3] and finally the generation of a 3D digital model [4] as presented by [1]. In this research work, i.e. step number [4] tested objects included cylinders, cubes, spheres and fruits. A Ronchi grid named G1 was generated in a PC, from which other grids referred as G2, G3, and G4 were set out of phase by 1/4, 1/2 and 3/4 of period from G1. Grid G1 was then projected onto the samples surface. Projected grid was named Gd. The difference between Gd and G1 followed by filtration generated de moiré fringes M1 and so on, obtaining the fringes M2, M3 and M4 from Gd. Fringes are out of phase one from each other by 1/4 of period, which were processed by the Rising Sun Moiré software to produce packed phase and further on, the unpacked fringes. Tested object was placed on a goniometer and rotate to generate four surfaces topography. These four surveyed surfaces were assembled by means of a SCILAB software, obtaining a three column matrix, corresponding to the object coordinates xi, also having elevation values and coordinates corrected as well. The work includes conclusions on the reliability of the proposed method as well as the setup simplicity and of low cost.

  10. A preliminary user-friendly, digital console for the control room parameters supervision in old-generation Nuclear Plants

    Energy Technology Data Exchange (ETDEWEB)

    Memmi, F.; Falconi, L.; Cappelli, M.; Palomba, M.; Santoro, E.; Bove, R.; Sepielli, M. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy)

    2012-07-01

    Improvements in the awareness of a system status is an essential requirement to achieve safety in every kind of plant. In particular, in the case of Nuclear Power Plants (NPPs), a progress is crucial to enhance the Human Machine Interface (HMI) in order to optimize monitoring and analyzing processes of NPP operational states. Firstly, as old-fashioned plants are concerned, an upgrading of the whole console instrumentation is desirable in order to replace an analog visualization with a full-digital system. In this work, we present a novel instrument able to interface the control console of a nuclear reactor, developed by using CompactRio, a National Instruments embedded architecture and its dedicated programming language. This real-time industrial controller composed by a real-time processor and FPGA modules has been programmed to visualize the parameters coming from the reactor, and to storage and reproduce significant conditions anytime. This choice has been made on the basis of the FPGA properties: high reliability, determinism, true parallelism and re-configurability, achieved by a simple programming method, based on LabVIEW real-time environment. The system architecture exploits the FPGA capabilities of implementing custom timing and triggering, hardware-based analysis and co-processing, and highest performance control algorithms. Data stored during the supervisory phase can be reproduced by loading data from a measurement file, re-enacting worthwhile operations or conditions. The system has been thought to be used in three different modes, namely Log File Mode, Supervisory Mode and Simulation Mode. The proposed system can be considered as a first step to develop a more complete Decision Support System (DSS): indeed this work is part of a wider project that includes the elaboration of intelligent agents and meta-theory approaches. A synoptic has been created to monitor every kind of action on the plant through an intuitive sight. Furthermore, another important

  11. PI fussy multimodal controller of programmed gains for the operation in the wide range of a turbo gas unit; Controlador PI difuso multimodo de ganancias programadas para la operacion en rango amplio de una unidad turbogas

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Martinez, Arnulfo A.

    2004-11-15

    las tecnicas de control multimodo, control de ganancias programadas y logica difusa, con la finalidad de tener un sistema de control que proporcione un mejor desempeno en el control de velocidad y control de potencia de las unidades turbogas (UTGs), comparado con los sistemas de control actuales, las cuales estan basadas en algoritmos de control PI convencional. Con este nuevo algoritmo se busca tener un sistema de control de mejor calidad, que proporcione una buena respuesta de rechazo a perturbaciones asi como un buen seguimiento a la referencia. Los problemas que se tienen en la implementacion de la logica de conmutacion (control multimodo) y la estrategia de interpolacion (ganancias programadas) se resuelven aplicando controladores difusos los cuales mantienen las ventajas de ambas estrategias para el control de procesos no lineales en amplias regiones de operacion. Debido a que los controladores implementados por las reglas del sistema difuso son del mismo tipo (PI, Proporcional Integral), el diseno del controlador difuso multimodo de ganancias programadas se redujo al diseno de un controlador PI difuso de ganancias programadas (PI-DGP). Con la finalidad de definir el esquema de programacion de ganancias, se analizaron tres enfoques bien conocidos para el diseno de controladores difusos de ganancias programadas y se compararon los mecanismos de interpolacion de cada uno de ellos. La integracion de la estructura de un controlador PI generalizado en los controladores locales que conforman el controlador PI-DGP (ver capitulo 4), permitio generar una mejor accion de control tanto de rechazo a perturbaciones como de seguimiento a la referencia. Como producto final se obtuvo un controlador PI-DGP, el cual permitio obtener una estrategia de control mucho mas eficaz y mostro ser una solucion viable al problema tecnico planteado. Con el controlador PI-DGP se mejoro considerablemente el desempeno del control de velocidad de la UTG durante la etapa de arranque, asi como el

  12. DNA barcoding as an effective tool in improving a digital plant identification system: a case study for the area of Mt. Valerio, Trieste (NE Italy.

    Directory of Open Access Journals (Sweden)

    Ilaria Bruni

    Full Text Available BACKGROUND: Identification keys are decision trees which require the observation of one or more morphological characters of an organism at each step of the process. While modern digital keys can overcome several constraints of classical paper-printed keys, their performance is not error-free. Moreover, identification cannot be always achieved when a specimen lacks some morphological features (i.e. because of season, incomplete development or miss-collecting. DNA barcoding was proven to have great potential in plant identification, while it can be ineffective with some closely related taxa, in which the relatively brief evolutionary distance did not produce differences in the core-barcode sequences. METHODOLOGY/PRINCIPAL FINDINGS: In this paper, we investigated how the DNA barcoding can support the modern digital approaches to the identification of organisms, using as a case study a local flora, that of Mt. Valerio, a small hill near the centre of Trieste (NE Italy. The core barcode markers (plastidial rbcL and matK, plus the additional trnH-psbA region, were used to identify vascular plants specimens. The usefulness of DNA barcoding data in enhancing the performance of a digital identification key was tested on three independent simulated scenarios. CONCLUSIONS/SIGNIFICANCE: Our results show that the core barcode markers univocally identify most species of our local flora (96%. The trnH-psbA data improve the discriminating power of DNA barcoding among closely related plant taxa. In the multiparametric digital key, DNA barcoding data improves the identification success rate; in our simulation, DNA data overcame the absence of some morphological features, reaching a correct identification for 100% of the species. FRIDA, the software used to generate the digital key, has the potential to combine different data sources: we propose to use this feature to include molecular data as well, creating an integrated identification system for plant

  13. The Collection of Questionnaires Concerning Wild Plants on the Digital Platform of the Polish Ethnographic Atlas

    Directory of Open Access Journals (Sweden)

    Agnieszka Pieńczak

    2016-06-01

    developing the research on the digital platform www.archiwumpae.us.edu.pl.

  14. Review report: safety and reliability issues on digital instrumentation and control systems in nuclear power plants and United States Nuclear Regulatory Commission`s dispositions

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, Norio; Suzudo, Tomoaki [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1998-09-01

    Recently, digital instrumentation and control (I and C) systems have been applied to nuclear power plants (NPPs) in various countries. Introduction of digital I and C systems, however, raises special issues on design, implementation, safety and licensing. Since FY 1997, the Japan Atomic Energy Research Institute (JAERI) has been carrying out a project, Study on Reliability of Digital I and C Systems, which includes extensive reviews of design approaches, technical standards, regulatory processes, especially, in the United States. This report summarizes the results from the study of National Research Council (NRC) and the U.S. Nuclear Regulatory Commission`s (USNRC`s) responses to the recommendations made by the NRC`s study. That study identified six technical key issues (system aspects of digital I and C technology, software quality assurance, common-mode software failure potential, safety and reliability assessment methods, human factors and man-machine interface, dedication of commercial off-the-shelf hardware and software) and two strategic key issues (case-by-case licensing process, adequacy of technical infrastructure) that arise from the introduction of digital I and C technology and then, made recommendations to the USNRC for coping with digital I and C applications. The USNRC responded to each recommendation and showed their own dispositions in which the USNRC agreed with most of the recommendations. In Japan, it is expected that introduction of digital I and C technology is inevitable in NPPs because the vendors are gradually discontinuing support and stocking of analog components. To cope with such situations, there is a need to develop and update the standards and guidelines applicable to digital I and C technology. The key issues and the USNRC`s dispositions provided in this report is believed to be useful for developing and updating them. (J.P.N.)

  15. Using high-dynamic-range digital repeat photography to measure plant phenology in a subarctic mire.

    Science.gov (United States)

    Garnello, A.; Dye, D. G.; Bogle, R.; Vogel, J.; Saleska, S. R.; Crill, P. M.

    2015-12-01

    A novel Visual Imaging System (VIS) was designed and deployed in a subarctic mire (68° 20' N, 19° 03'E) aimed at cataloging plant biological changes (phenology) and analyzing seasonal color shifts in relation to micrometeorological data along the summer growing season: June-November, 2015. The VIS is designed as a tower-based, solar-powered, automated phenology camera (Phenocam) that collects red, green, blue (RGB) and near-infrared (NIR) landscape images in High Dynamic Range (HDR) with fully programmable temporal resolution. HDR composite images are made through combining a series of rapid-capture photos with incremental increases of exposure times and a fixed focus, minimizing the spatial and visual data lost from shadows or from the over-saturation of light. This visual record of ecosystem phenology stages (Phenophases) is being used to (1) investigate vegetation-dependent spectral indices; (2) establish a cross-year comparison record of Phenophase seasonality; (3) investigate meteorological-dependent vegetation Phenophases; (4) provide ground-truthing measurements that enhance broader spatial-scale remote sensing analyses of subarctic wetlands.

  16. Protocol converter for serial communication between digital rectifier controllers and a power plant SCADA system

    Directory of Open Access Journals (Sweden)

    Vukić Vladimir Đ.

    2016-01-01

    Full Text Available The paper describes the protocol converter INT-485-MBRTU, developed for serial communication between the thyristor rectifier (based on the proprietary protocol "INT-CPD-05", according to standard RS-485 and the SCADA system (based on protocol "Modbus RTU", of the same standard in the thermal power plant "Nikola Tesla B1". Elementary data on industrial communication protocols and communication gateways were provided. The basic technical characteristics of the "Omron" programmable logic controller CJ series were described, as well as the developed device INT-485-MBRTU. Protocol converters with two versions of communication software were tested, differing only in one control word, intended for a forced successive change of communication sequences, in opposite to automatic sequence relieve. The device iNT-485-MBRTU, with the program for forced successive change of communication sequences, demonstrated the reliability of data transfer of 100 %, in a sample of approximately 480 messages. For nearly the same sample, the same protocol converter, with a version of the program without any type of message identifiers, transferred less than 60 % of the foreseen data. During multiple sixty-hour tests, the reliability of data transfer of at least 99.9979% was recorded, in 100% of the analysed cases, and for a sample of nearly 96,000 pairs of the send and receive messages. We analysed the results and estimated the additional possibilities for application of the INT-485-MBRTU protocol converter.

  17. Implementation of digital safety related I and C systems at nuclear power plants. A systematic approach to training

    Energy Technology Data Exchange (ETDEWEB)

    Roedig, Peter; Schoenfelder, Christian [AREVA NP GmbH (Germany)

    2012-11-01

    In the past, refurbishment or modernization projects at nuclear power plants (NPP) dealing with the AREVA product for safety related digital instrumentation and control (I and C) systems, i.e. TELEPERM {sup registered} XS (TXS), regularly led to the development and implementation of different project specific training courses. They mostly dealt with a basic introduction to TELEPERM {sup registered} XS, as well as project specific engineering of TELEPERM {sup registered} XS and maintenance of the TELEPERM {sup registered} XS system supplied with the project. However, it gradually emerged that diverse training needs of different personnel involved in refurbishment or modernization projects as well as in new build projects had to be considered in more detail. Additionally, each target group, e.g. project managers, project engineers, technical engineers, commissioning engineers, operating and maintenance personnel, will have to work with TELEPERM {sup registered} XS at different phases within a project. Consequently, it became necessary to take into account the diverse training and project needs. According to the Systematic Approach to Training (SAT) process as developed and promoted by the International Atomic Energy Agency (IAEA), a job and task analysis was performed. After identification of related training needs and redesigning as well as modification or development of appropriate training material, a comprehensive, standardized TELEPERM {sup registered} XS training offer is now available at the AREVA Reactor Training Center. This training offer can be easily adapted to project or customer specific requirements. (orig.)

  18. LEITTEC `96. Digitization of instrumentation and control in nuclear power plants; LEITTEC `96. Digitalisierung der Leittechnik in Kernkraftwerken

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, K.G. [comp.

    1997-11-01

    The nuclear power plants in operation in Germany have been commissioned in the years from 1968 until 1988. Their control and safety systems likewise correspond to the electronic technology available then, as e.g. discrete semi-conductor technology. The high reliability of those systems contributed a major share to the excellent operating results achieved by German nuclear power plants. However, aging of existing systems as well as spare part availability and integration of older and more recent hardware generations now are posing specific problems. Intensive work has been devoted to the retrofitting of existing systems and integration of computer-assisted control systems as well as conversion to programmable systems in order to achieve a basis permitting economically justifiable operation, acceptable also from the angle of hardware and software inspection requirements, so that the German Atomforum thought that these activities and the underlying problems would make a suitable topic for a conference. There were about 150 experts attending the one-day meeting for intensive discussion and exchange of information. The proceedings volume contains 11 of the conference papers and provides an overview of the current status and expected developments in the field of digitization of instrumentation and control in nuclear power plants.(orig./CB) [Deutsch] Die in Deutschland betriebenen Kernkraftwerke haben ihren Betrieb alle zwischen 1968 und 1988 aufgenommen. Ihre Leit- und Sicherheitstechnik ist noch weitgehend von fest verdrahteten Elektroniksystemen und diskreter Halbleitertechnik gepraegt. Die hohe Zuverlaessigkeit dieser Systeme hat grossen Anteil an den hervorragenden Betriebsergebnissen, die immer wieder von deutschen Kernkraftwerken erzielt werden. Dennoch wirft die Alterung der vorhandenen Technik Fragen der Ersatzteilbeschaffung und der Integration unterschiedlicher Geraetegenerationen auf. Die intensiven Arbeiten, die in zurueckliegender Zeit geleistet wurden, um

  19. Discussion on the design of digital video monitoring of sewage treatment plant%谈污水处理厂数字视频监控的设计

    Institute of Scientific and Technical Information of China (English)

    杨坤

    2012-01-01

    Through the brief introduction and contrast on the analog video monitoring system and digital video monitoring system,and combining with the project examples introduced the design of digital video monitoring of sewage treatment plant,had important significance to operation,management,maintenance of sewage treatment plant.%通过对模拟视频监控系统和数字视频监控系统做简单介绍和对比,并结合工程实例介绍了污水处理厂中数字视频监控系统的设计,对污水厂的运行、管理、维护有重要意义。

  20. Clonación artificial de un controlador on-line, basado en lógica difusa y algoritmos genéticos

    Directory of Open Access Journals (Sweden)

    Javier Ballesteros

    2006-10-01

    Full Text Available Los Algoritmos Genéticos son procedimientos adaptativos para la búsqueda de soluciones en espacios complejos, inspirados en la evolución biológica, con patrones de operaciones basados en el principio darwiniano de reproducción y supervivencia de los individuos que mejor se adaptan al entorno en que viven. En este artículo se presenta un estudio sobre los Algoritmos Genéticos y la Lógica Difusa, para desarrollar una metodología propuesta y replicar la caja negra de un controlador, utilizando procedimientos de obtención del conjunto de reglas de inferencia, agrupamiento difuso y después aplicar el desarrollo del algoritmo genético simple con algunas alteraciones, buscando el objetivo del trabajo propuesto.

  1. Projeto e desenvolvimento de um controlador de motores "brushless" (BLDC) para aplicação em volantes e rodas de inércia

    OpenAIRE

    Fernando de Almeida Martins

    2014-01-01

    Este trabalho apresenta o projeto e o desenvolvimento de uma eletrônica para controle de motores de corrente contínua sem escovas (\\emph{Brushless DC Motor }- BLDC). A aplicação visada é o emprego deste controlador em rodas de reação para sistemas de controle de atitude de satélites. O principal objetivo e o foco da aplicação foi o desenvolvimento e construção de vários métodos para acionar o motor e medir os parâmetros de desempenho. A placa projetada criou uma plataforma adequada para o est...

  2. Diseño e implementación de controladores lineales para regulación del bus DC en convertidores VSC para HVDC

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Hidalgo Mora

    2014-04-01

    Full Text Available Durante las últimas dos décadas se ha innovado y desarrollado tecnologías en los sistemas de transmisión en corriente continua. El desarrollo tecnológico en equipos y componentes electrónicos de potencia ha permitido la flexibilidad y mo-dularidad de interconexiones de varios sistemas en corriente alterna y corriente continua. En este sentido, la tecnología de sistemas de transmisión de alta tensión en corriente continua, a base de convertidores a fuente de tensión, aparece como una opción tecnológica de amplio desarrollo gracias a la facilidad y flexibilidad que ofrece en el control del flujo de potencia activa y reactiva entre sistemas de diferentes características. Por lo tanto, para una correcta operación del sistema de transmisión en alta tensión en corriente continua, se requiere una regulación del voltaje en el bus de corriente continua y el flujo de potencia reactiva entre la subestación rectificadora y la red de corriente alterna con el cual se interconecta. En el presente artículo se establecen metodologías para el modelado, identificación y diseño de controladores para la regulación del bus de corriente continua y el flujo de potencia reactiva en un convertidor a fuente de voltaje operando como rectificador. Adicionalmente, se abordan técnicas de control por realimentación de estados aplicadas al convertidor a fuente de voltaje. Por último, se presentan resultados prácticos obtenidos de la implementación de un prototipo de convertidor en conjunto con los controladores diseñados

  3. Factibilidad del uso del almidón de achira como agente controlador de fltrado en lodos de perforación base agua

    Directory of Open Access Journals (Sweden)

    Emiliano Ariza León

    2013-06-01

    Full Text Available El almidón de achira es un polímero de glucosa natural proveniente de una variedad de plantas o semillas, compuesto principalmente por una fracción molecular lineal (amilosa y una ramificada (amilopectina, la relación de estos componentes y su organización física dentro de la estructura granular le confiere al almidón propiedades fisicoquímicas y funcionales características. La industria de los hidrocarburos desde el año de 1930, ha venido utilizando el almidón como agente aditivo en todo tipo de lodos, mostrando alta eficacia en funciones durante las actividades de perforación tales como la remoción de sólidos del fondo del hueco y en el control de filtrado hacia la formación. En este trabajo se evalúo la efectividad del almidón de achira o sagú sin modificar, como agente controlador de filtrado en lodos de perforación base agua, respecto a otros aditivos comercialmente utilizados por la industria, elaborados a base de celulosa polianiónica y polisacárido preservado. Se realizaron, al fluido de perforación y a condiciones de laboratorio, pruebas estándar de filtrado API, reología y pH.Los resultados de esta investigación muestran que el almidón de achira puede ser utilizado como agente controlador de filtrado en lodos de perforación base agua con un rendimiento superior comparado con los aditivos utilizados en este proyecto.

  4. Examining the use of color-infrared digital aerial photography to map common non-native invasive plants on two Southern Indiana U.S. Fish & Wildlife Service National Wildlife Refuges

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — OBJECTIVES: The overall objective was to determine if CIR digital aerial photography could be used to efficiently map and analyze common invasive plant distribution...

  5. Geologic analyses of LANDSAT-1 multispectral imagery of a possible power plant site employing digital and analog image processing. [in Pennsylvania

    Science.gov (United States)

    Lovegreen, J. R.; Prosser, W. J.; Millet, R. A.

    1975-01-01

    A site in the Great Valley subsection of the Valley and Ridge physiographic province in eastern Pennsylvania was studied to evaluate the use of digital and analog image processing for geologic investigations. Ground truth at the site was obtained by a field mapping program, a subsurface exploration investigation and a review of available published and unpublished literature. Remote sensing data were analyzed using standard manual techniques. LANDSAT-1 imagery was analyzed using digital image processing employing the multispectral Image 100 system and using analog color processing employing the VP-8 image analyzer. This study deals primarily with linears identified employing image processing and correlation of these linears with known structural features and with linears identified manual interpretation; and the identification of rock outcrops in areas of extensive vegetative cover employing image processing. The results of this study indicate that image processing can be a cost-effective tool for evaluating geologic and linear features for regional studies encompassing large areas such as for power plant siting. Digital image processing can be an effective tool for identifying rock outcrops in areas of heavy vegetative cover.

  6. Evaluación de Spalangia endius y Muscidifurax sp. (Hymenoptera, Pteromalidae como controladores de Musca domestica en el Perú

    Directory of Open Access Journals (Sweden)

    Edgar Inciso

    2013-05-01

    Full Text Available En el presente trabajo se comparó la actividad parasitoide de las microavispas Spalangia endius y Muscidifurax sp. sobre el estadio pupal de Musca domestica. La mejor temperatura para la crianza fue de 25 °C. El ciclo de S. endius se completó en 22,6 días, mientras en Muscidifurax sp. en 14,8 días. La duración del ciclo fue inversamente relacionada con la temperatura, siendo mayor en las hembras que en los machos. La longevidad fue similar en ambas especies de microavispas (20,7 días en S. endius y 18,6 días en Muscifurax sp..La oviposicion de S. endius a los 15 días fue sobre 175 pupas de M. domestica, valor mayor que Muscidifurax que parasitó 140 pupas en 16 días. En ambas especies la mayor postura ocurrió al tercer día. Las pupas de M. domestica de dos días de maduración fueron las mas parasitadas con 66,4% de parasitismo efectivo por S. endius y 60,2% por Muscidifurax sp. El número óptimo de pupas de M. domestica fue 10 (10:1. Se concluye que en condiciones de laboratorio, Spalangia endius puede ser un eficiente controlador biológico de pupas de Musca domestica.

  7. Robustez de um controlador adaptativo proposto à perturbações limitadas = Robustness of a proposed adaptive controller to limited disturbances

    Directory of Open Access Journals (Sweden)

    Nardênio Almeida Martins

    2005-01-01

    Full Text Available Este artigo apresenta o projeto de um controlador adaptativo e robusto de robôs manipuladores no espaço de juntas. Uma nova lei de controle adaptativo composta, contendo um termo adicional robusto e que usa o erro de predição e os erros de seguimento para direcionar a estimação de parâmetros é baseada na passividade e no método direto deLyapunov. A convergência e a estabilidade global são mostradas para o algoritmo de controle adaptativo e robusto. Simulações numéricas são fornecidas para demonstrar o desempenho e a robustez do algoritmo proposto.This article presents a robust and adaptive control design for robotmanipulators in joint space coordinates. A new composite adaptive control law, which contains a robust additional term and which uses the prediction error and the tracking errors to drive parameter estimation, is based on passivity and on Lyapunov direct method. Itis shown that global stability and convergence can be achieved for the robust and adaptive control algorithm. Numerical simulations are provided to demonstrate the performance and the robustness of the proposed algorithm.

  8. Control de velocidad de una estera transportadora de caña con un controlador difuso; Speed Control of Sugar Cane Belt Conveyer with Fuzzy Controller

    Directory of Open Access Journals (Sweden)

    Ariel Domínguez Cardosa

    2011-02-01

    Full Text Available Se describen las experiencias de los autores en el diseño de un controlador difuso para el control de velocidad deun motor de inducción en coordenadas de campo, que acciona una estera transportadora de caña, sin la necesidadde realizar las compensaciones en los ejes d-q, lo que simplifica sustancialmente el control. El controladordifuso implementado es del tipo Mamdani y utiliza como variables de entrada el error de la velocidad y el cambiodel error de la velocidad, y como variable de salida la corriente de mando del eje q. Para el desemborronado seempleó el método del centro de gravedad. Los resultados alcanzados muestran que el comportamiento delsistema de control sometido a cambios bruscos de carga y referencia son superiores a los obtenidos con un PIDclásico.  This paper describes the experience obtained by the authors in the design of a fuzzy controller for speed controlof an induction motor in field oriented, that drives a sugar cane belt conveyor, without carrying out the compensationsin the d-q axes. The Mamdani type fuzzy controller was implemented using speed error and the rate ofchange of the speed error as input variables and the current component in the q-axis as output variable. Thesimulation results reached show that the behaviour of the control system under suddenly load and referencechanges are better than those results obtained using PID classic.

  9. Development of digital device based work verification system for cooperation between main control room operators and field workers in nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Seung Min, E-mail: jewellee@kaeri.re.kr [Korea Atomic Energy Research Institute, 305-353, 989-111 Daedeok-daero, Yuseong-gu, Daejeon (Korea, Republic of); Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Lee, Hyun Chul, E-mail: leehc@kaeri.re.kr [Korea Atomic Energy Research Institute, 305-353, 989-111 Daedeok-daero, Yuseong-gu, Daejeon (Korea, Republic of); Ha, Jun Su, E-mail: junsu.ha@kustar.ac.ae [Department of Nuclear Engineering, Khalifa University of Science Technology and Research, Abu Dhabi P.O. Box 127788 (United Arab Emirates); Seong, Poong Hyun, E-mail: phseong@kaist.ac.kr [Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea, Republic of)

    2016-10-15

    Highlights: • A digital device-based work verification and cooperation support system was developed. • Requirements were derived by interviewing field operators having experiences with mobile-based work support systems. • The usability of the proposed system was validated by conducting questionnaire surveys. • The proposed system will be useful if the manual or the set of guidelines is well constructed. - Abstract: Digital technologies have been applied in the nuclear field to check task results, monitor events and accidents, and transmit/receive data. The results of using digital devices have proven that these devices can provide high accuracy and convenience for workers, allowing them to obtain obvious positive effects by reducing their workloads. In this study, as one step forward, a digital device-based cooperation support system, the nuclear cooperation support and mobile documentation system (Nu-COSMOS), is proposed to support communication between main control room (MCR) operators and field workers by verifying field workers’ work results in nuclear power plants (NPPs). The proposed system consists of a mobile based information storage system to support field workers by providing various functions to make workers more trusted by MCR operators; also to improve the efficiency of meeting, and a large screen based information sharing system supports meetings by allowing both sides to share one medium. The usability of this system was estimated by interviewing field operators working in nuclear power plants and experts who have experience working as operators. A survey to estimate the usability of the suggested system and the suitability of the functions of the system for field working was conducted for 35 subjects who have experience in field works or with support system development-related research. The usability test was conducted using the system usability scale (SUS), which is widely used in industrial usability evaluation. Using questionnaires

  10. Digital Sensor Technology

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, Ken D. [Idaho National Lab. (INL), Idaho Falls, ID (United States); Quinn, Edward L. [Technology Resources, Dana Point, CA (United States); Mauck, Jerry L. [Technology Resources, Dana Point, CA (United States); Bockhorst, Richard M. [Technology Resources, Dana Point, CA (United States)

    2015-02-01

    The nuclear industry has been slow to incorporate digital sensor technology into nuclear plant designs due to concerns with digital qualification issues. However, the benefits of digital sensor technology for nuclear plant instrumentation are substantial in terms of accuracy and reliability. This paper, which refers to a final report issued in 2013, demonstrates these benefits in direct comparisons of digital and analog sensor applications. Improved accuracy results from the superior operating characteristics of digital sensors. These include improvements in sensor accuracy and drift and other related parameters which reduce total loop uncertainty and thereby increase safety and operating margins. An example instrument loop uncertainty calculation for a pressure sensor application is presented to illustrate these improvements. This is a side-by-side comparison of the instrument loop uncertainty for both an analog and a digital sensor in the same pressure measurement application. Similarly, improved sensor reliability is illustrated with a sample calculation for determining the probability of failure on demand, an industry standard reliability measure. This looks at equivalent analog and digital temperature sensors to draw the comparison. The results confirm substantial reliability improvement with the digital sensor, due in large part to ability to continuously monitor the health of a digital sensor such that problems can be immediately identified and corrected. This greatly reduces the likelihood of a latent failure condition of the sensor at the time of a design basis event. Notwithstanding the benefits of digital sensors, there are certain qualification issues that are inherent with digital technology and these are described in the report. One major qualification impediment for digital sensor implementation is software common cause failure (SCCF).

  11. Diseño de controladores P, PI y PID para el comportamiento dinámico de un servo-sistema hidráulico, basado en desarrollo experimental

    Directory of Open Access Journals (Sweden)

    María Elena Anaya Pérez

    2014-06-01

    Full Text Available Este artículo presenta el diseño de controladores Proporcional (P, Proporcional Integral (PI y Proporcional Integral Derivativo (PID, utilizando modelado matemático, simulación e implementación electrónica del comportamiento dinámico de un servo-sistema hidráulico, a través de la aplicación de la técnica de sintonización de Ziegler – Nichols basada en una metodología experimental para distintos puntos de operación. En la parte experimental de este trabajo son usados instrumentos de medición como data logger; la simulación del sistema se lleva a cabo en la plataforma de Matlab®. Además, el software ADAMView® es utilizado en el diseño de tres tipos de controladores: P, PI y PID, aplicados a diferentes puntos de operación de la planta.

  12. Digital Gene Expression Analysis Based on De Novo Transcriptome Assembly Reveals New Genes Associated with Floral Organ Differentiation of the Orchid Plant Cymbidium ensifolium.

    Directory of Open Access Journals (Sweden)

    Fengxi Yang

    Full Text Available Cymbidium ensifolium belongs to the genus Cymbidium of the orchid family. Owing to its spectacular flower morphology, C. ensifolium has considerable ecological and cultural value. However, limited genetic data is available for this non-model plant, and the molecular mechanism underlying floral organ identity is still poorly understood. In this study, we characterize the floral transcriptome of C. ensifolium and present, for the first time, extensive sequence and transcript abundance data of individual floral organs. After sequencing, over 10 Gb clean sequence data were generated and assembled into 111,892 unigenes with an average length of 932.03 base pairs, including 1,227 clusters and 110,665 singletons. Assembled sequences were annotated with gene descriptions, gene ontology, clusters of orthologous group terms, the Kyoto Encyclopedia of Genes and Genomes, and the plant transcription factor database. From these annotations, 131 flowering-associated unigenes, 61 CONSTANS-LIKE (COL unigenes and 90 floral homeotic genes were identified. In addition, four digital gene expression libraries were constructed for the sepal, petal, labellum and gynostemium, and 1,058 genes corresponding to individual floral organ development were identified. Among them, eight MADS-box genes were further investigated by full-length cDNA sequence analysis and expression validation, which revealed two APETALA1/AGL9-like MADS-box genes preferentially expressed in the sepal and petal, two AGAMOUS-like genes particularly restricted to the gynostemium, and four DEF-like genes distinctively expressed in different floral organs. The spatial expression of these genes varied distinctly in different floral mutant corresponding to different floral morphogenesis, which validated the specialized roles of them in floral patterning and further supported the effectiveness of our in silico analysis. This dataset generated in our study provides new insights into the molecular mechanisms

  13. Semi-automatic digital image impact assessments of Maize Lethal Necrosis (MLN) at the leaf, whole plant and plot levels

    Science.gov (United States)

    Kefauver, S. C.; Vergara-Diaz, O.; El-Haddad, G.; Das, B.; Suresh, L. M.; Cairns, J.; Araus, J. L.

    2016-12-01

    Maize is the top staple crop for low-income populations in Sub-Saharan Africa and is currently suffering from the appearance of new diseases, which, together with increased abiotic stresses from climate change, are challenging the very sustainability of African societies. Current constraints in field phenotyping remain a major bottleneck for future breeding advances, but RGB-based High-Throughput Phenotyping Platforms (HTPPs) have demonstrated promise for rapidly developing both disease-resistant and weather-resilient crops. RGB HTTPs have proven cost-effective in studies assessing the effect of abiotic stresses, but have yet to be fully exploited to phenotype disease resistance. RGB image quantification using different alternate color space transforms, including BreedPix indices, were produced as part of a FIJI plug-in (http://fiji.sc/Fiji; http://github.com/george-haddad/CIMMYT). For validation, Maize Lethal Necrosis (MLN) visual scale impact assessments from 1 to 5 were scored by the resident CIMMYT plant pathologist, with 1 being MLN resistant (healthy plants with no visual symptoms) and 5 being totally susceptible (entirely necrotic with no green tissue). Individual RGB vegetation indexes outperformed NDVI (Normalized Difference Vegetation Index), with correlation values up to 0.72, compared to 0.56 for NDVI. Specifically, Hue, Green Area (GA), and the Normalized Green Red Difference Index (NGRDI) consistently outperformed NDVI in estimating MLN disease severity. In multivariate linear and various decision tree models, Necrosis Area (NA) and Chlorosis Area (CA), calculated similar to GA and GGA from Breedpix, also contributed significantly to estimating MLN impact scores. Results using UAS (Unmanned Aerial Systems), proximal field photography of plants and plots and flatbed scanners of individual leaves have produced similar results, demonstrating the robustness of these cost-effective RGB indexes. Furthermore, the application of the indices using

  14. DEVELOPMENT OF THE DIGITALIZED AUTOMATIC SEISMIC TRIP SYSTEM FOR NUCLEAR POWER PLANTS USING THE SYSTEMS ENGINEERING APPROACH

    Directory of Open Access Journals (Sweden)

    JAE CHEON JUNG

    2014-04-01

    Full Text Available The automatic seismic trip system (ASTS continuously monitors PGA (peak ground acceleration from the seismic wave, and automatically generates a trip signal. This work presents how the system can be designed by using a systems engineering approach under the given regulatory criteria. Overall design stages, from the needs analysis to design verification, have been executed under the defined processes and activities. Moreover, this work contributes two significant design areas for digitalized ASTS. These are firstly, how to categorize the ASTS if the ASTS has a backed up function of the manual reactor trip, and secondly, how to set the requirements using the given design practices either in overseas ASTS design or similar design. In addition, the methodology for determining the setpoint can be applied to the I&C design and development project which needs to justify the error sources correctly. The systematic approach that has been developed and realized in this work can be utilized in designing new I&C (instrument and control system as well.

  15. Digital forestry research in China

    Institute of Scientific and Technical Information of China (English)

    TANG; Shouzheng; TANG; Lina; Guofan; Shao; DAI; Limin

    2006-01-01

    Digital Forestry as a concept was developed after the Digital Earth program. The Chinese scientists were not only among the pioneers who first proposed the concept of Digital Forestry, but also contributed a lot to the development of Digital Forestry. Digital Forestry is a digital framework to maintain forest planting, management, using, and protect. The synergetic use of computationally-intensive quantitative methods together with information technologies is the most important foundation for the development of Digital Forestry. Under this situation, the experience of Digital Forestry development in China is relatively rich. A number of academicians, scholars, and professional administrators were involved in discussing the Digital Forestry Construction Scheme. The Project of Digital Forestry Practicability approved by the State Forestry Administration is a major instance in developing Digital Forestry standard and key techniques. By introducing a case study of Digital Forestry, this paper reviews the concept of Digital Forestry, the way turning traditional forestry into Digital Forestry, and the future development of Digital Forestry.

  16. 核电厂数字化报警系统处理技术研究%Research on Digital Alarm System Processing Technology of Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    徐晓梅; 叶王平; 詹林钰

    2014-01-01

    针对现有核电厂主控制室报警系统所存在的典型人因问题,从数字化报警系统的报警信号流分析入手,提出合理实施报警信号处理和报警显示处理相关技术,并给出报警抑制、报警动态优先级管理及报警显示和控制集成解决方案,以减少报警系统人因问题。%Aiming at the existing typical human problems in main control room alarm system of nuclear power plant ,based on the digital alarm system alarm signal flow anal‐ysis ,a reasonable implementation of the alarm signal processing and alarm display pro‐cessing related technologies was put forward .And alarm suppression ,alarm dynamics priority management and alarm presentation and control integration solutions to reduce alarm system human factor issues were given .

  17. Digital Preservation.

    Science.gov (United States)

    Yakel, Elizabeth

    2001-01-01

    Reviews research on digital preservation issues, including born-digital and digitally recreated documents. Discusses electronic records research; metadata and other standards; electronic mail; Web-based documents; moving images media; selection of materials for digitization, including primary sources; administrative issues; media stability…

  18. Accuracy analysis of vegetation cover measurement using digital photography for regular planted woodland%规则林地覆盖度照相测量法的精度分析

    Institute of Scientific and Technical Information of China (English)

    赵继强; 谢东辉; 孟夏; 穆西晗; 阎广建

    2013-01-01

    为定量研究照相法测量规则林地覆盖度中采样策略、相机非垂直拍摄等因素对覆盖度计算结果的影响,该文对河北怀来的一片梨树林进行了实地测量,通过对测量数据的统计计算,利用植被结构生成软件 Onyx tree professional重建梨树林场景,采用基于物理的光线追踪算法模拟相机拍摄的照片,提出了规则林地覆盖度照相法测量的采样方案,并通过计算机模拟检验了采样方案。通过精确控制模拟相机的拍摄条件,进一步分析了非垂直拍摄对测量精度的影响。结果表明,相机的非竖直拍摄对覆盖度计算结果的精度有较大的影响,误差最大可达27.9%。该文提出的测量方案为规则林地的覆盖度实地测量提供了参考。%Digital photography is now the most widely used method to obtain the vegetation cover in field measurements. It uses a digital camera to shoot the research area straight downward, classify the digital images into plants and soil, and calculate the percentages of the pixel numbers of plants. When measuring the vegetation cover of regular planted woodland with digital photography, the accuracy of the calculated vegetation cover is affected by following factors such as the sampling strategy and non-vertical shooting of digital camera. However, it is difficult to analyze these factors mentioned above quantitatively in situ measurement because there are lots of uncertain errors involved. In this study, we used the computer simulation method to evaluate these factors because in a computer simulated scene, we can strictly control all these uncertainties. We measured a regular planted pyrus orchard to get the structural data in Huailai (40.373°N, 115.723°E), Heibei province. Through statistics of the measured structural data, a regular planted pyrus orchard scene was reconstructed with the plants structural generating software, onyx tree professional which is widely used in forest

  19. Análise dos efeitos dos parâmetros de configuração de um controlador neuro-fuzzy aplicado em um processo de neutralização

    OpenAIRE

    Débora Zenaide Gorri Mazzali

    2015-01-01

    Técnicas de Inteligência Artificial (IA) buscam imitar o raciocínio humano através da aplicação de regras lógicas, para um conjunto de dados disponível, de modo a chegar a uma forma mais eficiente de resolver problemas. Sendo um dos ramos da IA, a técnica neuro-fuzzy abordada neste estudo, será aplicada em controladores de processos que, por sua vez, são formados por estruturas de regras lógicas de difícil definição, pois existem inúmeras possibilidades de configurações que podem ser adotadas...

  20. Carga de trabalho dos controladores de tráfego aéreo - análise da área de controle terminal Brasília por meio de simulação.

    OpenAIRE

    McWilliam Oliveira

    2007-01-01

    Propõe-se no presente trabalho analisar, por meio de simulação, a carga de trabalho dos controladores de tráfego aéreo do Controle de Aproximação de Brasília (APP-BR) em seis diferentes cenários de sua área. Para tanto, utiliza-se o software RAMS Plus, ferramenta computacional especialmente desenvolvida para operações em espaço aéreo e lado aéreo dos aeroportos. O escopo da análise foi montado para as operações no espaço aéreo que apresentam origem ou destino no Aeroporto Internacional de Bra...

  1. O trabalho na aviação e as práticas de saúde sob o olhar do controlador de tráfego aéreo

    OpenAIRE

    Rita de Cássia Seixas Sampaio Araujo

    2000-01-01

    Os profissionais do controle de tráfego aéreo desenvolvem uma função de importância para a sociedade. Neste sentido, realizou-se estudo com objetivo de analisar as representações sociais dos controladores de tráfego aéreo sobre sua saúde e sobre as práticas de saúde desenvolvidas pelo Sistema de Saúde da Aeronáutica, tendo em vista uma possível contribuição para a adoção de práticas de promoção e proteção da saúde e segurança da aviação. Desenvolveu-se um estudo qualitativo, utilizando-se a t...

  2. Treinamento simulado baseado em competência para controlador de tráfego aéreo em cenários complexos : Copa das Confederações

    OpenAIRE

    Rosa Maria dos Santos Miranda

    2013-01-01

    O serviço de controle de tráfego aéreo é complexo e exige do controlador de tráfego aéreo - ATCO (Air Traffic Control Officer) competências específicas para o desempenho da sua atividade. O treinamento simulado é uma das etapas fundamentais para a sua qualificação. Assim como as empresas privadas estão buscando desenvolver novas técnicas e modelos de gestão visando a obter resultados eficazes com qualidade e desempenho, também no Instituto de Controle do Espaço Aéreo - ICEA, um Órgão público ...

  3. Digital Actuator Technology

    Energy Technology Data Exchange (ETDEWEB)

    Ken Thomas; Ted Quinn; Jerry Mauck; Richard Bockhorst

    2014-09-01

    There are significant developments underway in new types of actuators for power plant active components. Many of these make use of digital technology to provide a wide array of benefits in performance of the actuators and in reduced burden to maintain them. These new product offerings have gained considerable acceptance in use in process plants. In addition, they have been used in conventional power generation very successfully. This technology has been proven to deliver the benefits promised and substantiate the claims of improved performance. The nuclear industry has been reluctant to incorporate digital actuator technology into nuclear plant designs due to concerns due to a number of concerns. These could be summarized as cost, regulatory uncertainty, and a certain comfort factor with legacy analog technology. The replacement opportunity for these types of components represents a decision point for whether to invest in more modern technology that would provide superior operational and maintenance benefits. Yet, the application of digital technology has been problematic for the nuclear industry, due to qualification and regulatory issues. With some notable exceptions, the result has been a continuing reluctance to undertake the risks and uncertainties of implementing digital actuator technology when replacement opportunities present themselves. Rather, utilities would typically prefer to accept the performance limitations of the legacy analog actuator technologies to avoid impacts to project costs and schedules. The purpose of this report is to demonstrate that the benefits of digital actuator technology can be significant in terms of plant performance and that it is worthwhile to address the barriers currently holding back the widespread development and use of this technology. It addresses two important objectives in pursuit of the beneficial use of digital actuator technology for nuclear power plants: 1. To demonstrate the benefits of digital actuator

  4. Digital Culture and Digital Library

    Directory of Open Access Journals (Sweden)

    Yalçın Yalçınkaya

    2016-12-01

    Full Text Available In this study; digital culture and digital library which have a vital connection with each other are examined together. The content of the research consists of the interaction of culture, information, digital culture, intellectual technologies, and digital library concepts. The study is an entry work to integrity of digital culture and digital library theories and aims to expand the symmetry. The purpose of the study is to emphasize the relation between the digital culture and digital library theories acting intersection of the subjects that are examined. Also the perspective of the study is based on examining the literature and analytical evaluation in both studies (digital culture and digital library. Within this context, the methodology of the study is essentially descriptive and has an attribute for the transmission and synthesis of distributed findings produced in the field of the research. According to the findings of the study results, digital culture is an inclusive term that describes the effects of intellectual technologies in the field of information and communication. Information becomes energy and the spectrum of the information is expanding in the vertical rise through the digital culture. In this context, the digital library appears as a new living space of a new environment. In essence, the digital library is information-oriented; has intellectual technology support and digital platform; is in a digital format; combines information resources and tools in relationship/communication/cooperation by connectedness, and also it is the dynamic face of the digital culture in time and space independence. Resolved with the study is that the digital libraries are active and effective in the formation of global knowing and/or mass wisdom in the process of digital culture.

  5. Digital photography

    National Research Council Canada - National Science Library

    Windsor, J S; Rodway, G W; Middleton, P M; McCarthy, S

    2006-01-01

    The emergence of a new generation of "point-and-shoot" digital cameras offers doctors a compact, portable and user-friendly solution to the recording of highly detailed digital photographs and video images...

  6. Digital Tectonics

    DEFF Research Database (Denmark)

    Christiansen, Karl; Borup, Ruben; Søndergaard, Asbjørn;

    2014-01-01

    Digital Tectonics treats the architectonical possibilities in digital generation of form and production. The publication is the first volume of a series, in which aspects of the strategic focus areas of the Aarhus School of Architecture will be disseminated.......Digital Tectonics treats the architectonical possibilities in digital generation of form and production. The publication is the first volume of a series, in which aspects of the strategic focus areas of the Aarhus School of Architecture will be disseminated....

  7. Digital squares

    DEFF Research Database (Denmark)

    Forchhammer, Søren; Kim, Chul E

    1988-01-01

    Digital squares are defined and their geometric properties characterized. A linear time algorithm is presented that considers a convex digital region and determines whether or not it is a digital square. The algorithm also determines the range of the values of the parameter set of its preimages....... The analysis involves transforming the boundary of a digital region into parameter space of slope and y-intercept...

  8. Digital Citizenship

    Science.gov (United States)

    Isman, Aytekin; Canan Gungoren, Ozlem

    2014-01-01

    Era in which we live is known and referred as digital age.In this age technology is rapidly changed and developed. In light of these technological advances in 21st century, schools have the responsibility of training "digital citizen" as well as a good citizen. Digital citizens must have extensive skills, knowledge, Internet and …

  9. Digital preservation

    CERN Document Server

    Deegan, Marilyn

    2013-01-01

    Digital preservation is an issue of huge importance to the library and information profession right now. With the widescale adoption of the internet and the rise of the world wide web, the world has been overwhelmed by digital information. Digital data is being produced on a massive scale by individuals and institutions: some of it is born, lives and dies only in digital form, and it is the potential death of this data, with its impact on the preservation of culture, that is the concern of this book. So how can information professionals try to remedy this? Digital preservation is a complex iss

  10. Digital subtraktion

    DEFF Research Database (Denmark)

    Mussmann, Bo Redder

    2004-01-01

    Digital subtraktion er en metode til at fjerne uønskede oplysninger i et røntgenbillede. Subtraktionsteknikken bruges primært i forbindelse med angiografi hvor man kun er interesseret i at se selve karret. Derfor er digital subtraktion i daglig tale synonymt med DSA eller DVI – hhv. Digital...... Subtraction Angiography eller Digital Vascular Imaging. Benævnelserne er to røntgenfirmaers navn for den samme teknik. Digital subtraktion kræver speciel software, samt at apparaturet kan eksponere i serier....

  11. Digital Natives or Digital Tribes?

    Science.gov (United States)

    Watson, Ian Robert

    2013-01-01

    This research builds upon the discourse surrounding digital natives. A literature review into the digital native phenomena was undertaken and found that researchers are beginning to identify the digital native as not one cohesive group but of individuals influenced by other factors. Primary research by means of questionnaire survey of technologies…

  12. Digital Design for Marine Power Plant Based on Visual Basic.NET%基于Visual Basic.NET的船舶动力装置数字化设计

    Institute of Scientific and Technical Information of China (English)

    史斌杰; 张维竞; 徐筱欣; 车驰东

    2011-01-01

    Digital design for marine power plant based on VisualBasic.NET is to make design marine power plant digitally with the functions of Visual Basic.NET. Basic calculations can be made with powerful computing capabilities of Visual Basic. NET, the selection of equipment can be made with good data exchange between Visual Basic.NET and data base; fuzzy comprehensive evaluation method can be made with the matrix calculation by using array of Visual Basic.NET, the drafting system diagram can be made with Visual Basic.NET by calling on AUTOCAD and its blocks. After making design of marine power plant digitized, the efficiency, scientific significance, and accuracy of design can be increased.%基于Visual Basic.NET的船舶动力装置数字化设计是利用Visual Basic.NET的各项功能实现船舶动力装置设计的数字化、智能化.其中,利用Visual Basic.NET的计算功能实现基本计算的数字化;利用Visual Basic.NET与数据库的良好交互功能实现设备选型的数字化;利用Visual Basic.NET的数组进行矩阵计算实现模糊综合评判法的数字化;利用Visual Basic.NET对AUTOCAD调用以及AUTOCAD的块功能实现绘制系统原理图的数字化.船舶动力装置设计实现数字化后可提高设计效率,并且可以增加设计的科学性和准确性.

  13. Digital Insights

    DEFF Research Database (Denmark)

    Knudsen, Gry Høngsmark

    , by incorporating media as both channel, frame, and apparatus for advertising response, the dissertation brings into attention that more aspects than the text-reader relationship influence ad response. Finally, the dissertation proposes the assemblage approach for exploring big data in consumer culture research......This dissertation forwards the theory of digital consumer-response as a perspective to examine how digital media practices influence consumers’ response to advertising. Digital consumer-response is a development of advertising theory that encompasses how consumers employ their knowledge...... and practices with digital media, when they meet and interpret advertising. Through studies of advertising response on YouTube and experiments with consumers’ response to digitally manipulated images, the dissertation shows how digital media practices facilitate polysemic and socially embedded advertising...

  14. Digital Forensics

    OpenAIRE

    Ψευτέλης, Αθανάσιος Δημήτρης

    2013-01-01

    A reprint from American Scientist the magazine of Sigma Xi, The Scientific Research Society Since the 1980s, computers have had increasing roles in all aspects of human life—including an involvement in criminal acts. This development has led to the rise of digital forensics, the uncovering and examination of evidence located on all things electronic with digital storage, including computers, cell phones, and networks. Digital forensics researchers and practitione...

  15. Low cost driver device for microclimate maintenance in the pre-milking of dairy cattle Dispositivo controlador de baixo custo para a manutenção do microclima na pré-ordenha de bovinos leiteiros

    Directory of Open Access Journals (Sweden)

    Irenilson M. da Silva

    2013-02-01

    Full Text Available Due to the importance of the environment on animal production and thus environmental control, the study aims to build a system for monitoring and control the meteorological variables, temperature and relative humidity, low cost, which can be associated with an evaporative cooling system (ECS. The system development included all the stages of assembly, test and laboratory calibration, and later the validation of the equipment carried in the field. The validation step showed results which allowed concluding that the system can be safely used in the monitoring of these variables. The controller was efficient in management of the microclimate in the waiting corral and allowed the maintenance of the air temperature within the comfort range for dairy cattle in pre-milking with averaged 25.09 ºC during the afternoon. The equipment showed the lower cost (R$ 325.76 when compared to other middle market (R$ 450.00.Devido à importância do ambiente na produção animal e, portanto, do controle ambiental adequado, objetivou-se com este trabalho a construção de um sistema de monitoramento e controle das variáveis meteorológicas, temperatura e umidade relativa do ar, de baixo custo, associado a um sistema de resfriamento adiabático evaporativo (SRAE. O desenvolvimento do sistema controlador compreendeu as etapas de montagem, teste e aferição em laboratório e, posteriormente, a etapa de validação do equipamento realizada a campo. A etapa de validação apresentou resultados que permitiram concluir que o sistema pode ser utilizado com segurança no monitoramento e controle dessas variáveis por meio dos atuadores. O controlador mostrou-se eficiente no manejo do microclima no curral de espera e permitiu a manutenção da temperatura do ar dentro da faixa de conforto para bovinos leiteiros na pré-ordenha, apresentando média de 25,09 ºC durante o turno da tarde. O equipamento apresentou custo inferior (R$ 325,76 quando comparado à média de outros

  16. Digital printing

    Science.gov (United States)

    Sobotka, Werner K.

    1997-02-01

    Digital printing is described as a tool to replace conventional printing machines completely. Still this goal was not reached until now with any of the digital printing technologies to be described in the paper. Productivity and costs are still the main parameters and are not really solved until now. Quality in digital printing is no problem anymore. Definition of digital printing is to transfer digital datas directly on the paper surface. This step can be carried out directly or with the use of an intermediate image carrier. Keywords in digital printing are: computer- to-press; erasable image carrier; image carrier with memory. Digital printing is also the logical development of the new digital area as it is pointed out in Nicholas Negropotes book 'Being Digital' and also the answer to networking and Internet technologies. Creating images text and color in one country and publishing the datas in another country or continent is the main advantage. Printing on demand another big advantage and last but not least personalization the last big advantage. Costs and being able to coop with this new world of prepress technology is the biggest disadvantage. Therefore the very optimistic growth rates for the next few years are really nonexistent. The development of complete new markets is too slow and the replacing of old markets is too small.

  17. Digital displacements

    DEFF Research Database (Denmark)

    Pors, Anja Svejgaard

    2014-01-01

    In recent years digital reforms are being introduced in the municipal landscape of Denmark. The reforms address the interaction between citizen and local authority. The aim is, that by 2015 at least 80 per cent of all correspondence between citizens and public authority will be transmitted through...... digital interface. However, the transformation of citizen services from traditional face-to-face interaction to digital self-service gives rise to new practices; some citizens need support to be able to manage self-service through digital tools. A mixture of support and teaching, named co...

  18. Electronic plants

    Science.gov (United States)

    Stavrinidou, Eleni; Gabrielsson, Roger; Gomez, Eliot; Crispin, Xavier; Nilsson, Ove; Simon, Daniel T.; Berggren, Magnus

    2015-01-01

    The roots, stems, leaves, and vascular circuitry of higher plants are responsible for conveying the chemical signals that regulate growth and functions. From a certain perspective, these features are analogous to the contacts, interconnections, devices, and wires of discrete and integrated electronic circuits. Although many attempts have been made to augment plant function with electroactive materials, plants’ “circuitry” has never been directly merged with electronics. We report analog and digital organic electronic circuits and devices manufactured in living plants. The four key components of a circuit have been achieved using the xylem, leaves, veins, and signals of the plant as the template and integral part of the circuit elements and functions. With integrated and distributed electronics in plants, one can envisage a range of applications including precision recording and regulation of physiology, energy harvesting from photosynthesis, and alternatives to genetic modification for plant optimization. PMID:26702448

  19. Research on EMC Simulation & Prediction Technology of Digital Instrument and Control System in Nuclear Power Plant%核电站数字化仪控系统电磁兼容仿真预测技术的研究

    Institute of Scientific and Technical Information of China (English)

    杨凯生; 石桂连; 张春雷; 金成日

    2013-01-01

    本文引述了核电站仪控系统电磁兼容的重要性,通过介绍电磁兼容技术发展的趋势,提出了电磁兼容仿真预测在核电站数字化仪控系统设计过程中的应用理论,说明电磁兼容仿真预测对提高数字化仪控系统的电磁兼容可靠性有重要意义。%This article quotes the Electro Magnetic Compatibility (EMC) importance of instrumentation and control (I&C) systems in nuclear power plant. According to the development directions of EMC design method, the article gives EMC simulation application theory in the process of designing digital I&C systems in nuclear power plant. It shows significance that EMC simulation for improving EMC performance of digital I&C systems.

  20. Digital Libraries

    CERN Document Server

    Papy, Fabrice

    2008-01-01

    Of vital interest to all librarians and information specialists, this book presents all aspects of the effects of digitization of today's and tomorrow's libraries. From social to technical issues, Digital Libraries includes chapters on the growth of the role of librarian, the reader experience, cataloging, search engines, OPAC, law, ergonomic studies, and the future of libraries.

  1. Digital Audiobooks:

    DEFF Research Database (Denmark)

    Have, Iben; Pedersen, Birgitte Stougaard

    Audiobooks are rapidly gaining popularity with widely accessible digital downloading and streaming services. The paper is framing how the digital audiobook expands and changes the target groups for book publications and how it as an everyday activity is creating new reading experiences, places...

  2. Aplicación de Técnicas Neuro-Difusas para el Diseño de un Controlador Application of Neuro-Fuzzy Techniques for the Design of a Controller

    Directory of Open Access Journals (Sweden)

    A. Noriega

    2005-01-01

    Full Text Available En este trabajo se presentan algunos esquemas de control neuro-difuso para el diseño de un controlador difuso simplificado de dos entradas y una salida. La simplificación introducida ha permitido lograr una importante reducción en el tiempo de cálculo de la señal de control, pero es posible que en algunos sistemas se pueda afectar el desempeño del sistema de control. Para resolver este problema se ha incorporado una red neuronal de manera que se pueda mejorar la calidad en el control y se pueda controlar procesos de dinámica compleja. Los resultados de las aplicaciones demuestran que se puede disponer de una metodología de control neuro-difuso general, aplicable a cualquier sistema.In this work some neuro-fuzzy control schemes for the design of a simplified controller of two inputs and one output are presented. This simplification has allowed getting an important reduction in the calculation control time but it is possible that this can affect the performance of the control system. To solve this problem a neural network has been incorporated so that the control quality can be improved and problems of complex dynamics can be solved. The results of the applications show that it is possible to have a neuro-fuzzy control methodology applicable to any system.

  3. Diseño e Implementación de un Sistema Controlador de Temperatura PID para la Unidad Air Flow Temperature Control System Mediante la Utilización de la Herramienta RTW (Real Time Workshop de Matlab

    Directory of Open Access Journals (Sweden)

    Byron Acuña

    2012-11-01

    Full Text Available El presente proyecto "DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA CONTROLADOR DE TEMPERATURA PID PARA LA UNIDAD AIR FLOW TEMPERATURE CONTROL SYSTEM MEDIANTE LA UTILIZACIÓN DE LA HERRAMIENTA RTW (REAL TIME WORKSHOP DE MATLAB"abarca el estudio de la herramienta RTW en donde se analizó la arquitectura, el algoritmo, el proceso y las etapas en el desarrollo de un modelo en tiempo real por medio del sistema SIMULINK® de MATLAB®, además se realizó una HMI la cuál mediante subsistemas .mdl desarrollados en SIMULINK® permitieron la identificación de la planta, el control PID experimental y la simulación del control PID, utilizando para esto la tarjeta de adquisición y generación de datos Nationals Instruments PCI 6221, la misma que, luego de haberla configurado permitió interconectar la planta real con los subsistemas de la HMI desarrolla.

  4. Development and testing of a recorder and controller for a microalgae culture reactor; Desarrollo y prueba de un registrador y controlador para un reactor de cultivo de microalgas

    Energy Technology Data Exchange (ETDEWEB)

    Esquivel, Wilson; Reyes, Jose Fernando; Bruijn, Johannes; Hernandez, Alejandro [Universidad de Concepcion, Chilan (Chile). Facultad de Ingenieria Agricola. Dept. de Mecanizacion y Energia], Emails: wesquive@udec.cl., jreyes@udec.cl., jdebruij@udec.cl., alehernandez@udec.cl

    2010-07-01

    An electronic system to monitor and control operational variables in a Raceway type of reactor for the culture of the Scenedesmus spinosus microalgae and later production for biodiesel and mitigating CO{sub 2} was developed and tested. The electronic system is constituted by a micro controller, a card reader SD, a card SD, a real-time clock, a power supply, a screen GLCD, a keyboard and a card for data acquisition, all implemented for 4-20 mA and 0-5 V output sensors. Temperature, pH, electrical conductivity, dissolved oxygen and solar radiation were measured digitalized and saved every 10 minutes. These variables were digitalized and kept in the SD memory every 10 minutes. It was determined that the most favorable conditions for the proliferation of the culture are near pH neutral and a temperature of 30 deg C, existing a strong correlation between pH and the dissolved CO{sub 2} level. Using the digital outputs of temperature and pH of the microcontroller, the CO{sub 2} injection and the elimination of O{sub 2} were controlled to maintain an adequate environment for the development of the culture. (author)

  5. Digital Leadership

    DEFF Research Database (Denmark)

    Zupancic, Tadeja; Verbeke, Johan; Achten, Henri

    2016-01-01

    . With this paper we intend to initiate a discussion in the eCAADe community to reflect and develop ideas in order to develop digital leadership skills amongst the membership. This paper introduces some important aspects, which may be valuable to look into when developing digital leadership skills.......Leadership is an important quality in organisations. Leadership is needed to introduce change and innovation. In our opinion, in architectural and design practices, the role of leadership has not yet been sufficiently studied, especially when it comes to the role of digital tools and media...

  6. Digital holography

    CERN Document Server

    Picart, Pascal

    2013-01-01

    This book presents a substantial description of the principles and applications of digital holography.The first part of the book deals with mathematical basics and the linear filtering theory necessary to approach the topic. The next part describes the fundamentals of diffraction theory and exhaustively details the numerical computation of diffracted fields using FFT algorithms. A thorough presentation of the principles of holography and digital holography, including digital color holography, is proposed in the third part.A special section is devoted to the algorithms and method

  7. Digital electronics

    CERN Document Server

    Morris, John

    2013-01-01

    An essential companion to John C Morris's 'Analogue Electronics', this clear and accessible text is designed for electronics students, teachers and enthusiasts who already have a basic understanding of electronics, and who wish to develop their knowledge of digital techniques and applications. Employing a discovery-based approach, the author covers fundamental theory before going on to develop an appreciation of logic networks, integrated circuit applications and analogue-digital conversion. A section on digital fault finding and useful ic data sheets completes th

  8. DIGITAL ASSESSMENTS

    OpenAIRE

    Nielsen, Kurt Gammelgaard; Petersen, Lise

    2013-01-01

    In accordance with The Danish eGOVERNMENT strategy 2011-2015 digital assessment and exam should be implemented at all Danish universities by the end of 2013. University of Southern Denmark (SDU) decided to start the implementation in May 2010.By the exam term of January 2013, the implementation proved successful, and close to completion. The majority of assessments at all of the 5 faculties and 5 campuses were digital, and students had handed in a total of 17.021 digital assessments.On the ba...

  9. Digital Leadership

    DEFF Research Database (Denmark)

    Zupancic, Tadeja; Verbeke, Johan; Achten, Henri

    2016-01-01

    Leadership is an important quality in organisations. Leadership is needed to introduce change and innovation. In our opinion, in architectural and design practices, the role of leadership has not yet been sufficiently studied, especially when it comes to the role of digital tools and media....... With this paper we intend to initiate a discussion in the eCAADe community to reflect and develop ideas in order to develop digital leadership skills amongst the membership. This paper introduces some important aspects, which may be valuable to look into when developing digital leadership skills....

  10. Digital Insights

    DEFF Research Database (Denmark)

    Knudsen, Gry Høngsmark

    and practices with digital media, when they meet and interpret advertising. Through studies of advertising response on YouTube and experiments with consumers’ response to digitally manipulated images, the dissertation shows how digital media practices facilitate polysemic and socially embedded advertising......, by incorporating media as both channel, frame, and apparatus for advertising response, the dissertation brings into attention that more aspects than the text-reader relationship influence ad response. Finally, the dissertation proposes the assemblage approach for exploring big data in consumer culture research...

  11. Digital fabrication

    CERN Document Server

    2012-01-01

    The Winter 2012 (vol. 14 no. 3) issue of the Nexus Network Journal features seven original papers dedicated to the theme “Digital Fabrication”. Digital fabrication is changing architecture in fundamental ways in every phase, from concept to artifact. Projects growing out of research in digital fabrication are dependent on software that is entirely surface-oriented in its underlying mathematics. Decisions made during design, prototyping, fabrication and assembly rely on codes, scripts, parameters, operating systems and software, creating the need for teams with multidisciplinary expertise and different skills, from IT to architecture, design, material engineering, and mathematics, among others The papers grew out of a Lisbon symposium hosted by the ISCTE-Instituto Universitario de Lisboa entitled “Digital Fabrication – A State of the Art”. The issue is completed with four other research papers which address different mathematical instruments applied to architecture, including geometric tracing system...

  12. Digital Humanities

    DEFF Research Database (Denmark)

    Brügger, Niels

    2016-01-01

    the humanities for decades, starting with research fields such as humanities computing or computational linguistics in the 1950s, and later new media studies and internet studies. The historical development of digital humanities has been characterized by a focus on three successive, but co-existing types......Digital humanities is an umbrella term for theories, methodologies, and practices related to humanities scholarship that use the digital computer as an integrated and essential part of its research and teaching activities. The computer can be used for establishing, finding, collecting......, and preserving material to study, as an object of study in its own right, as an analytical tool, or for collaborating, and for disseminating results. The term "digital humanities" was coined around 2001, and gained currency within academia in the following years. However, computers had been used within...

  13. Digital Snaps

    DEFF Research Database (Denmark)

    Sandbye, Mette; Larsen, Jonas

    The New Face of Snapshot Photography / Jonas Larsen and Mette Sandbye -- pt. I. IMAGES ON WEB 2.0 AND THE CAMERA PHONE -- ch. 1. Overlooking, Rarely Looking and Not Looking / Martin Lister -- ch. 2. The (Im)mobile Life of Digital Photographs: The Case of Tourist Photography / Jonas Larsen -- ch. 3....... Distance as the New Punctum / Mikko Villi -- pt. II. FAMILY ALBUMS IN TRANSITION -- ch. 4. How Digital Technologies Do Family Snaps, Only Better / Gillian Rose -- ch. 5. Friendship Photography: Memory, Mobility and Social Networking / Joanne Garde-Hansen -- ch. 6. Play, Process and Materiality in Japanese...... Purikura Photography / Mette Sandbye -- ch. 7. 'Buying an Instrument Does Not Necessarily Make You a Musician': Studio Photography and the Digital Revolution / Sigrid Lien -- pt. III. NEW PUBLIC FORMS -- ch. 8 Paparazzi Photography, Seriality and the Digital Photo Archive / Anne Jerslev and Mette Mortensen...

  14. Becoming digital

    DEFF Research Database (Denmark)

    Pors, Anja Svejgaard

    2015-01-01

    The purpose of this paper is to examine the impact of e-government reforms on street-level bureaucrats’ professionalism and relation to citizens, thus demonstrating how the bureaucratic encounter unfolds in the digital era. Design/methodology/approach: The paper is based on an ethnographic study....... An ethnographic account of how digital reforms are implemented in practice shows how street-level bureaucrat’s classic tasks such as specialized casework are being reconfigured into educational tasks that promote the idea of “becoming digital”. In the paper, the author argues that the work of “becoming digital....... Originality/value: The study contributes to ethnographic research in public administration by combining two separate subfields, e-government and street-level bureaucracy, to discern recent transformations in public service delivery. In the digital era, tasks, control and equality are distributed in ways...

  15. Digital Steganography

    OpenAIRE

    KOCIÁNOVÁ, Helena

    2009-01-01

    Digital steganography is a technique for hiding data mostly into multimedia files (images, audio, video). With the development of information technology this technique has found its use in the field of copyright protection and secret data transfer, could be even applied in places where is limited possibility of using cryptography (e. g. by law). This thesis gives insight into digital steganography and contains an application using this technique.

  16. Digital watermark

    OpenAIRE

    Jasna Maver

    2004-01-01

    The huge amount of multimedia contents available on the World-Wide-Web is beginning to raise the question of their protection. Digital watermarking is a technique which can serve various purposes, including intellectual property protection, authentication and integrity verification, as well as visible or invisible content labelling of multimedia content. Due to the diversity of digital watermarking applicability, there are many different techniques, which can be categorised according to diffe...

  17. Digital Architecture Planning Model

    Energy Technology Data Exchange (ETDEWEB)

    Oxstrand, Johanna Helene [Idaho National Lab. (INL), Idaho Falls, ID (United States). Light Water Reactor Sustainability Program (LWRS); Al Rashdan, Ahmad Yahya Mohammad [Idaho National Lab. (INL), Idaho Falls, ID (United States). Light Water Reactor Sustainability Program (LWRS); Bly, Aaron Douglas [Idaho National Lab. (INL), Idaho Falls, ID (United States). Light Water Reactor Sustainability Program (LWRS); Rice, Brandon Charles [Idaho National Lab. (INL), Idaho Falls, ID (United States). Light Water Reactor Sustainability Program (LWRS); Fitzgerald, Kirk [Idaho National Lab. (INL), Idaho Falls, ID (United States). Light Water Reactor Sustainability Program (LWRS); Wilson, Keith Leon [Idaho National Lab. (INL), Idaho Falls, ID (United States). Light Water Reactor Sustainability Program (LWRS)

    2016-03-01

    As part of the U.S. Department of Energy’s Light Water Reactor Sustainability Program, the Digital Architecture (DA) Project focuses on providing a model that nuclear utilities can refer to when planning deployment of advanced technologies. The digital architecture planning model (DAPM) is the methodology for mapping power plant operational and support activities into a DA that unifies all data sources needed by the utilities to operate their plants. The DA is defined as a collection of information technology capabilities needed to support and integrate a wide spectrum of real-time digital capabilities for performance improvements of nuclear power plants. DA can be thought of as integration of the separate instrumentation and control and information systems already in place in nuclear power plants, which are brought together for the purpose of creating new levels of automation in plant work activities. A major objective in DAPM development was to survey all key areas that needed to be reviewed in order for a utility to make knowledgeable decisions regarding needs and plans to implement a DA at the plant. The development was done in two steps. First, researchers surveyed the nuclear industry in order to learn their near-term plans for adopting new advanced capabilities and implementing a network (i.e., wireless and wire) infrastructure throughout the plant, including the power block. Secondly, a literature review covering regulatory documents, industry standards, and technical research reports and articles was conducted. The objective of the review was to identify key areas to be covered by the DAPM, which included the following: 1. The need for a DA and its benefits to the plant 2. Resources required to implement the DA 3. Challenges that need to be addressed and resolved to implement the DA 4. Roles and responsibilities of the DA implementation plan. The DAPM was developed based on results from the survey and the literature review. Model development, including

  18. 核电厂数字化人-机界面特征对人因失误的影响研究%Effects of Digital Human-Machine Interface Characteristics on Human Error in Nuclear Power Plants

    Institute of Scientific and Technical Information of China (English)

    李鹏程; 张力; 戴立操; 黄卫刚

    2011-01-01

    In order to identify the effects of digital human-machine interface characteristics on human error in nuclear power plants, the new characteristics of digital human-machine interface are identified by comparing with the traditional analog control systems in the aspects of the information display, user interface interaction and management, control systems, alarm systems and procedures system, and the negative effects of digital human-machine interface characteristics on human error are identified by field research and interviewing with operators such as increased cognitive load and workload, mode confusion, loss of situation awareness. As to the adverse effects related above, the corresponding prevention and control measures of human errors are provided to support the prevention and minimization of human errors and the optimization of human - machine interface design.%以数字化主控室的现场调研和对操纵员的访谈内容为依据,分别从信息显示、用户界面交互与管理、控制系统、报警系统、规程系统等方面与传统的模拟控制系统进行了比较分析,识别数字化人-机界面新特征.结果显示,数字化人.机界面新特征对人因失误产生的不利影响主要表现为操纵员的认知负荷和操作负荷的增加,容易产生模式混淆、情境意识丧失等方面.针对上述不利的影响,提出了相应的人因失误预防对策,为人因失误的预防和人-机界面的优化设计提供决策支持.

  19. Digital Humanities and networked digital media

    OpenAIRE

    Finnemann, Niels Ole

    2014-01-01

    This article discusses digital humanities and the growing diversity of digital media, digital materials and digital methods. The first section describes the humanities computing tradition formed around the interpretation of computation as a rule-based process connected to a concept of digital materials centred on the digitisation of non-digital, finite works, corpora and oeuvres. The second section discusses “the big tent” of contemporary digital humanities. It is argued that there can be no ...

  20. Advantages obtained in radiation protection when using computerized radiography tests - CR (digital) in processing plants; Vantagens obtidas em radioprotecao quando do uso do ensaio de radiografia computadorizada - RC (digital) em plantas de processo

    Energy Technology Data Exchange (ETDEWEB)

    Jose, Joao Carlos Videira; Milani, Hilton Sergio B.; Paes, Eliseu Almir de Oliveira; Boita, Mario de [ARCtest Servicos Tecnicos de Inspecao e Manutencao Industrial Ltda., Sao Paulo, SP (Brazil)]. E-mail: tecnica@arctest.com.br; Souza, Laercio de; Serra, Flavio Augusto dos Santos [PETROBRAS, Paulinia, SP, RJ (Brazil). Refinaria do Planalto Paulista (REPLAN)]. E-mails: laerciosouza@petrobras.com.br; serra@petrobras.com.br

    2002-07-01

    During the year 2000, the ARCtest initiated the development of the research for adapting the Computerized Radiography - CR, originally conceived for medical applications, for the Industry, trying initially to attend the requirements of the processing plants, concerning to the detection of deterioration mechanisms (evaluation of the piping integrity). Due to the obtained excellent results, the possibility of utilization the Computerized Radiography - CR in the radiographic inspection were studied during the shutdown of the Catalytic Cracking Unit of the PETROBRAS-REPLAN, specifically in the replacement of the CO boiler superheater, where a large number of the small diameter welded joints have been predicted.

  1. Digital watermark

    Directory of Open Access Journals (Sweden)

    Jasna Maver

    2000-01-01

    Full Text Available The huge amount of multimedia contents available on the World-Wide-Web is beginning to raise the question of their protection. Digital watermarking is a technique which can serve various purposes, including intellectual property protection, authentication and integrity verification, as well as visible or invisible content labelling of multimedia content. Due to the diversity of digital watermarking applicability, there are many different techniques, which can be categorised according to different criteria. A digital watermark can be categorised as visible or invisible and as robust or fragile. In contrast to the visible watermark where a visible pattern or image is embedded into the original image, the invisible watermark does not change the visual appearance of the image. The existence of such a watermark can be determined only through a watermark ex¬traction or detection algorithm. The robust watermark is used for copyright protection, while the fragile watermark is designed for authentication and integrity verification of multimedia content. A watermark must be detectable or extractable to be useful. In some watermarking schemes, a watermark can be extracted in its exact form, in other cases, we can detect only whether a specific given watermarking signal is present in an image. Digital libraries, through which cultural institutions will make multimedia contents available, should support a wide range of service models for intellectual property protection, where digital watermarking may play an important role.

  2. Proposta metodológica para avaliação de controlador automático de seções e pulverização Proposed methodology for evaluation of automatic controller of boom sections and spray

    Directory of Open Access Journals (Sweden)

    Étore F Reynaldo

    2011-02-01

    Full Text Available Na aplicação de produtos fitossanitários, a utilização de equipamentos que controlam automaticamente as seções da barra e a pulverização já é realidade; entretanto, ainda não há resultados que demonstrem a sua eficácia. Por esse motivo, este trabalho teve por finalidade desenvolver uma metodologia para a avaliação de um equipamento que controla automaticamente as seções e a pulverização. Avaliou-se um controlador automático de seções e pulverização de mercado, e, para tanto, foram utilizados três níveis de acurácia do sinal de GPS (algoritmo interno, SBAS e RTK, três ângulos para a simulação de entrada e saída da barra de pulverização em relação à borda do talhão (0; 45 e 60º e três velocidades de trabalho (1,66; 5,00 e 8,33 m s-1. A metodologia proposta possibilitou a determinação dos tempos e distâncias de abertura e fechamento das seções. Os coeficientes de variação para os tempos e distâncias de abertura e fechamento das seções indicaram uma variação considerável. Houve interações significativas em função do tipo de sinal de GPS. A configuração recomendada pelo fabricante e adotada para a avaliação do controlador automático de seções e pulverização não atende a todas as situações simuladas.In the application of pesticides, the use of equipment that automatically controls the sections of the boom and the spray is already reality. However, there are no results to show its effectiveness. Therefore, this work was to develop a methodology for the evaluation of equipments which automatically controls the boom sections and the spraying pattern. A commercial automatic controller of boom spraying sections was evaluated using three levels of GPS accuracy (internal algorithm, SBAS and RTK, three angles for the simulation of entry and exit of the spray bar on field edges (0, 45 and 60 º and three forward speeds (1.66, 5.00 and 8.33 m s-1. The proposed methodology allowed the

  3. Digital Earth Watch: Investigating the World with Digital Cameras

    Science.gov (United States)

    Gould, A. D.; Schloss, A. L.; Beaudry, J.; Pickle, J.

    2015-12-01

    Every digital camera including the smart phone camera can be a scientific tool. Pictures contain millions of color intensity measurements organized spatially allowing us to measure properties of objects in the images. This presentation will demonstrate how digital pictures can be used for a variety of studies with a special emphasis on using repeat digital photographs to study change-over-time in outdoor settings with a Picture Post. Demonstrations will include using inexpensive color filters to take pictures that enhance features in images such as unhealthy leaves on plants, or clouds in the sky. Software available at no cost from the Digital Earth Watch (DEW) website that lets students explore light, color and pixels, manipulate color in images and make measurements, will be demonstrated. DEW and Picture Post were developed with support from NASA. Please visit our websites: DEW: http://dew.globalsystemsscience.orgPicture Post: http://picturepost.unh.edu

  4. Digital Humanities and networked digital media

    DEFF Research Database (Denmark)

    Finnemann, Niels Ole

    2014-01-01

    This article discusses digital humanities and the growing diversity of digital media, digital materials and digital methods. The first section describes the humanities computing tradition formed around the interpretation of computation as a rule-based process connected to a concept of digital...... materials centred on the digitisation of non-digital, finite works, corpora and oeuvres. The second section discusses “the big tent” of contemporary digital humanities. It is argued that there can be no unifying interpretation of digital humanities above the level of studying digital materials with the help...

  5. Desenvolvimento e avaliação de um controlador eletrônico para equipamentos de aplicação de insumos Development and evaluation of electronic control system in equipments for application of fertilizer

    Directory of Open Access Journals (Sweden)

    Claudio K. Umezu

    2006-03-01

    Full Text Available Com este trabalho, objetivou-se o desenvolvimento e avaliação de um sistema de controle para compensar a variação na rotação de acionamento dos dosadores de fertilizantes sólidos de um equipamento para formulação, dosagem e aplicação de fertilizantes sólidos no sulco, a taxas variáveis, em função da alteração da temperatura do óleo hidráulico. Desenvolveram-se controladores do tipo PID, para assegurar a manutenção precisa das rotações desejadas nos motores hidráulicos de acionamento dos dosadores de fertilizante. O equipamento foi testado em laboratório, utilizando-se sinais de testes padronizados, onde foi avaliado o seu comportamento em função do aquecimento do óleo hidráulico. Os testes realizados mostraram que o sistema de controle de rotação implementado foi adequado, mantendo inalterado o comportamento do sistema hidráulico, mesmo na ocorrência de variação da temperatura do óleo hidráulico.The objective of this research was the development and evaluation of a control system used to compensate variation on angular speed of dosers in an equipment for formulation, dosing and application of solid fertilizers in the furrow, at variable rates, by monitoring the hydraulic oil temperature changes. PID controllers were designed to guarantee the desired angular speed of the hydraulic motors dosing shaft. The equipment was tested in laboratory using standard signal tests procedure, being able to analyze the machine behavior as a function of the hydraulic oil temperature variations. The accomplished tests showed that the implemented control system was suitable and exhibited a steady behavior even during hydraulic oil temperature changes.

  6. Digital Relationships

    DEFF Research Database (Denmark)

    Ledborg Hansen, Richard

    -­‐Jones, 2011) for increases in effectiveness and efficiency we indiscriminately embrace digital communication and digitized information dissemination with enthusiasm – at the risk of ignoring the potentially dark side of technology. However, technology also holds a promise for better understanding precisely...... of residual deposits from technology in organizations and its effect on individuals ability to connect to one another. Based on the case study the paper describes indications and suggests potential implication hereof. Given the inherent enhancement possibilities of technology our expectation for entertainment......-­rich information and highly interesting communication are sky-­high and rising. With a continuous increase in digitized communication follows a decrease in face-­to-­face encounters and our ability to engage in inter-­personal relationships are suffering for it (Davis, 2013). The behavior described in this paper...

  7. Digital Creativity

    DEFF Research Database (Denmark)

    Petersson Brooks, Eva; Brooks, Anthony Lewis

    2014-01-01

    This paper reports on a study exploring the outcomes from children’s play with technology in early childhood learning practices. The paper addresses questions related to how digital technology can foster creativity in early childhood learning environments. It consists of an analysis of children......’s interaction with the KidSmart furniture focusing on digital creativity potentials and play values suggested by the technology. The study applied a qualitative approach and included125 children (aged three to five), 10 pedagogues, and two librarians. The results suggests that educators should sensitively...... consider intervening when children are interacting with technology, and rather put emphasize into the integration of the technology into the environment and to the curriculum in order to shape playful structures for children’s digital creativity....

  8. Fotografia digital

    OpenAIRE

    Vinicius Cauduro, Flávio; Pontifícia Universidade Católica do Rio Grande do Sul

    2008-01-01

    Poderíamos talvez definir como sendo fotografia digital toda e qualquer imagem obtida a partir de uma camera obscura, com características ótico-mecânicas variáveis através de princípios puramente analógicos ou por combinação híbrida (analógico/digital), e que seja posteriormente processada em computador e exibida de forma projetada (monitor ou tela) ou imprensa (papel ou filme).

  9. Digital photogrammetry

    CERN Document Server

    Egels, Yves

    2003-01-01

    Photogrammetry is the use of photography for surveying primarily and is used for the production of maps from aerial photographs. Along with remote sensing, it represents the primary means of generating data for Geographic Information Systems (GIS). As technology develops, it is becoming easier to gain access to it. The cost of digital photogrammetric workstations are falling quickly and these new tools are therefore becoming accessible to more and more users. Digital Photogrammetry is particularly useful as a text for graduate students in geomantic and is also suitable for people with a good basic scientific knowledge who need to understand photogrammetry, and who wish to use the book as a reference.

  10. Digital literacies

    CERN Document Server

    Hockly, Nicky; Pegrum, Mark

    2014-01-01

    Dramatic shifts in our communication landscape have made it crucial for language teaching to go beyond print literacy and encompass the digital literacies which are increasingly central to learners' personal, social, educational and professional lives. By situating these digital literacies within a clear theoretical framework, this book provides educators and students alike with not just the background for a deeper understanding of these key 21st-century skills, but also the rationale for integrating these skills into classroom practice. This is the first methodology book to address not jus

  11. Digital communication

    CERN Document Server

    Das, Apurba

    2010-01-01

    ""Digital Communications"" presents the theory and application of the philosophy of Digital Communication systems in a unique but lucid form. This book inserts equal importance to the theory and application aspect of the subject whereby the authors selected a wide class of problems. The Salient features of the book are: the foundation of Fourier series, Transform and wavelets are introduces in a unique way but in lucid language; the application area is rich and resemblance to the present trend of research, as we are attached with those areas professionally; a CD is included which contains code

  12. Digital filters

    CERN Document Server

    Hamming, Richard W

    1997-01-01

    Digital signals occur in an increasing number of applications: in telephone communications; in radio, television, and stereo sound systems; and in spacecraft transmissions, to name just a few. This introductory text examines digital filtering, the processes of smoothing, predicting, differentiating, integrating, and separating signals, as well as the removal of noise from a signal. The processes bear particular relevance to computer applications, one of the focuses of this book.Readers will find Hamming's analysis accessible and engaging, in recognition of the fact that many people with the s

  13. Uso de simuladores comerciais na análise comparativa de desempenho de controladores para um trocador de calor a placas

    OpenAIRE

    Guilherme Nardin Prado; Higor Conti de Almeida; Flávio Vasconcelos da Silva; Ana Maria Frattini Fileti

    2011-01-01

    Conventional feedback control and cascade control strategies were applied to a heat exchanger in order to compare the control performance in terms of deviations of temperature and settling time, under different plant disturbances. The plate type heat exchanger was designed by using the software ASPEN HTFS®. With the help of ASPEN PLUS®, the steady state was found and the simulation exported to the ASPEN DYNAMICS®. The process reaction curve method was then carried out. The parameters of first...

  14. Digitalization Boosting Novel Digital Services for Consumers

    Directory of Open Access Journals (Sweden)

    Kaisa Vehmas

    Full Text Available Digitalization has changed the world. The digital revolution has promoted the Internet, and more recently mobile network infrastructure, as the technological backbone of our society. Digital technologies have become more integrated across all sectors of o ...

  15. Digital Methods

    NARCIS (Netherlands)

    Rogers, R.

    2013-01-01

    In Digital Methods, Richard Rogers proposes a methodological outlook for social and cultural scholarly research on the Web that seeks to move Internet research beyond the study of online culture. It is not a toolkit for Internet research, or operating instructions for a software package; it deals wi

  16. Digital Tidbits

    Science.gov (United States)

    Kumaran, Maha; Geary, Joe

    2011-01-01

    Technology has transformed libraries. There are digital libraries, electronic collections, online databases and catalogs, ebooks, downloadable books, and much more. With free technology such as social websites, newspaper collections, downloadable online calendars, clocks and sticky notes, online scheduling, online document sharing, and online…

  17. Digital Tidbits

    Science.gov (United States)

    Kumaran, Maha; Geary, Joe

    2011-01-01

    Technology has transformed libraries. There are digital libraries, electronic collections, online databases and catalogs, ebooks, downloadable books, and much more. With free technology such as social websites, newspaper collections, downloadable online calendars, clocks and sticky notes, online scheduling, online document sharing, and online…

  18. Digital radiography

    DEFF Research Database (Denmark)

    Precht, H; Gerke, O; Rosendahl, K

    2012-01-01

    BACKGROUND: New developments in processing of digital radiographs (DR), including multi-frequency processing (MFP), allow optimization of image quality and radiation dose. This is particularly promising in children as they are believed to be more sensitive to ionizing radiation than adults...

  19. Digital books.

    Science.gov (United States)

    Wink, Diane M

    2011-01-01

    In this bimonthly series, the author examines how nurse educators can use the Internet and Web-based computer technologies such as search, communication, and collaborative writing tools; social networking and social bookmarking sites; virtual worlds; and Web-based teaching and learning programs. This article describes digital books.

  20. Digital forvaltning

    DEFF Research Database (Denmark)

    Remmen, Arne; Larsen, Torben; Mosgaard, Mette

    2004-01-01

    Større effektivitet, bedre service og mere demokrai er blot nogle af forventningerne til indførelse af digital forveltning i kommunerne. Kapitlet giver bland andet svar på spørgsmålene : Hvordan lever kommunerne op hertil i dagligdagen? hvilke virkemidler anvender de? Hvilke barrierer har der været...

  1. Digital Batteries

    Science.gov (United States)

    Hubler, Alfred

    2009-03-01

    The energy density in conventional capacitors is limited by sparking. We present nano-capacitor arrays, where - like in laser diodes and quantum wells [1] - quantization prevents dielectric breakthrough. We show that the energy density and the power/weight ratio are very high, possibly larger than in hydrogen [2]. Digital batteries are a potential clean energy source for cars, laptops, and mobile devices. The technology is related to flash drives. However, because of the high energy density, safety is a concern. Digital batteries can be easily and safely charged and discharged. In the discharged state they pose no danger. Even if a charged digital battery were to explode, it would produce no radioactive waste, no long-term radiation, and probably could be designed to produce no noxious chemicals. We discuss methodologies to prevent shorts and other measures to make digital batteries safe. [1] H. Higuraskh, A. Toriumi, F. Yamaguchi, K. Kawamura, A. Hubler, Correlation Tunnel Device, U. S. Patent No. 5,679,961 (1997) [2] Alfred Hubler, http://server10.how-why.com/blog/

  2. Fokus: Digital

    DEFF Research Database (Denmark)

    2014-01-01

    sammenhænge og fra forandrede distributionsformer. Dette betyder ændrede betingelser for både produktion og reception af kunstmusik og lydkunst. Med Digital tager vi udgangspunkt i fire komponisters meget forskellige bud på hvordan teknologien spiller en rolle i arbejdet. Juliana Hodkinson beskriver hvordan...

  3. Uso de simuladores comerciais na análise comparativa de desempenho de controladores para um trocador de calor a placas

    Directory of Open Access Journals (Sweden)

    Guilherme Nardin Prado

    2011-01-01

    Full Text Available Conventional feedback control and cascade control strategies were applied to a heat exchanger in order to compare the control performance in terms of deviations of temperature and settling time, under different plant disturbances. The plate type heat exchanger was designed by using the software ASPEN HTFS®. With the help of ASPEN PLUS®, the steady state was found and the simulation exported to the ASPEN DYNAMICS®. The process reaction curve method was then carried out. The parameters of first-order-plus-time-delay (FOPTD transfer functions were determined for the process and also for the load disturbances. In the Simulink/MATLAB® environment, feedback control diagrams were built employing these transfer functions to find the closed loop responses. The same methodology of use of commercial simulators can be applied to different unit operations of the chemical industry, as well as for plant-wide problems. It must be pointed out that, since they have friendly interface, access to thermodynamic data and robustness in the available numerical methods for simulation, an easy use and a steep learning curve were noted for all the commercial simulators employed in the present work.

  4. Digital Humanities and networked digital media

    DEFF Research Database (Denmark)

    Finnemann, Niels Ole

    2014-01-01

    This article discusses digital humanities and the growing diversity of digital media, digital materials and digital methods. The first section describes the humanities computing tradition formed around the interpretation of computation as a rule-based process connected to a concept of digital...... of software-supported methods. This is so, in part, because of the complexity of the world and, in part, because digital media remain open to the projection of new epistemologies onto the functional architecture of these media. The third section discusses the heterogeneous character of digital materials...... materials centred on the digitisation of non-digital, finite works, corpora and oeuvres. The second section discusses “the big tent” of contemporary digital humanities. It is argued that there can be no unifying interpretation of digital humanities above the level of studying digital materials with the help...

  5. 核电站数字化反应堆保护系统旁通设计研究%Research on Digital Reactor Protection System Bypass Design of Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    姚芝强

    2015-01-01

    在核电站整个寿期内,旁通是保证数字化反应堆保护系统在运行、维修和试验过程中满足可靠性目标和单一故障准则,保持安全重要构筑物、系统和部件执行安全功能的能力,确保电站安全正常运行的重要手段。本文通过对法规标准进行研究,筛选出旁通设计应遵循的原则,并以CPR1000堆型数字化反应堆保护系统需求为基础,通过在运核电站的实施方案分析,总结出旁通的设计原则和规范,可为后续新建或改造项目提供参考。%Over the lifetime of the nuclear power plant, the bypass is an important measure to make the digital reactor protection system meet reliability and failure criterion during operation, maintenance and testing, and keep functions of the systems, important components and parts workable. By studying the rules and standards, the design principles of the bypass are screened. Based on the digital reactor protection system requirements of CPR1000 reactor type, the design principles are summarized, which provides the reference for the new or reconstructive projects in the future.

  6. 核电站数字化仪控系统开发过程及其验证与确认%Development Process,Verification & Validation of the Digitized Instrument & Control System for Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    王翠芳

    2012-01-01

    分析了三代非能动型压水堆核电站AP1000的数字化仪控系统的开发过程模型,研究了与其开发过程紧密结合的验证与确认技术(V&V),特别是其审查、分析以及测试方法的使用,并提出了设计、测试及V&V过程的文档要求.该开发过程模型和V&V技术具有广泛的工业规范和标准认可度,对于我国自主化的核安全级数字化仪控系统的开发和取证具有重要的借鉴和指导意义.%The models of development process of digitized instrument and control systems for three generations of AP1000 passive pressurized water reactor nuclear power plants are analyzed, and their closely related verification and validation (V&V) technology, especially the methods of review, analysis and test are researched. In addition, the requirements of the documentations in design, test and V&V processes are proposed. The development processing model and V&V technology are widely acceptable to industrial specifications and standards, they provide significant reference and guidance for developing and certificating of domestic digitized instrument and control systems conforming nuclear safety grade.

  7. Digital Plasmonics

    CERN Document Server

    Gjonaj, Bergin; Johnson, Patrick M; Mosk, Allard P; Kuipers, Kobus; Lagendijk, Ad

    2010-01-01

    The field of plasmonics offers a route to control light fields with metallic nanostructures through the excitation of Surface Plasmon Polaritons (SPPs). These surface waves, bound to a metal dielectric interface, tightly confine electromagnetic energy. Active control over SPPs has potential for applications in sensing, photovoltaics, quantum communication, nano circuitry, metamaterials and super-resolution microscopy. We achieve here a new level of control of plasmonic fields using a digital spatial light modulator. Optimizing the plasmonic phases via feedback we focus SPPs at a freely pre-chosen point on the surface of a nanohole array with high resolution. Digital addressing and scanning of SPPs without mechanical motion will enable novel interdisciplinary applications of advanced plasmonic devices in cell microscopy, optical data storage and sensing.

  8. Digital tachometer

    Science.gov (United States)

    Shirokov, B.

    1984-03-01

    A tachometer with digital indication was built for measuring the speed of automobile engines with only two digits in the rpm readout. It consists of a Schmitt trigger for shaping input pulses, a pulse counter, a cycle time setting multivibrator and a readout time setting multivibrator, a stabilizer, a flicker suppressor, and a capacitive transducer. The instrument operates from a 12 V battery and draws 180 mA. The transducer includes a 30 to 50 turns coil of PEL 0.5 wire wound around the conductor which connects the ignition coil to the engine distributor and its transistor is mounted on a fin-type heat sink. Tuneup of the tachometer involves matching the transducer capacitor for maximum voltage at minimum current and trimming the readout time setting multivibrator with its adjustable resistor for a 1.5 readout with a 50 Hz input signal.

  9. Digital resources

    Directory of Open Access Journals (Sweden)

    Redazione Reti Medievali (a cura di

    2005-12-01

    Full Text Available Bibliotheca Latinitatis Mediaevalis (circa VII sec. - XIV sec. IntraText Digital Library [01/06] Corpus Scriptorum Latinorum. A digital library of Latin literature by David Camden [01/06] Fonti disponibili online concernenti la vita religiosa medievale Rete Vitae Religiosae Mediaevalis Studia Conectens [01/06] Fuentes del Medievo Hispanico Instituto de Historia, Consejo Superior de Investigaciones Científicas [01/06] Latin Literature Forum Romanum [01/06] Ludovico Antonio Muratori, Dissertazioni sopra le antichità italiane, 1751 Biblioteca dei Classici Italiani di Giuseppe Bonghi [01/06] Medieval Latin The Latin Library [01/06] Médiévales Presses Universitaires de Vincennes - Revues.org [01/06] Regesta imperii Deutsche Kommission für die Bearbeitung der Regesta Imperii e.V. [01/06] Suda On Line Byzantine Lexicography [01/06

  10. Becoming digital

    DEFF Research Database (Denmark)

    Pors, Anja Svejgaard

    2015-01-01

    . Originality/value: The study contributes to ethnographic research in public administration by combining two separate subfields, e-government and street-level bureaucracy, to discern recent transformations in public service delivery. In the digital era, tasks, control and equality are distributed in ways...... that call for symmetrical and relational approaches to studying street-level bureaucracy. The argument goes beyond technological or social determinism to find a fruitful intermediary position pointing at technological change as having both constraining and enabling effects....

  11. Digital Humanities

    DEFF Research Database (Denmark)

    Nielsen, Hans Jørn

    2015-01-01

    Artiklen præsenterer først nogle generelle problemstillinger omkring Digital Humanities (DH) med det formål at undersøge dem nærmere i relation til konkrete eksempler på forskellige digitaliseringsmåder og ændringer i dokumentproduktion. I en nærmere afgrænsning vælger artiklen den tendens i DH...

  12. Digital Humanities

    DEFF Research Database (Denmark)

    Nielsen, Hans Jørn

    2015-01-01

    Artiklen præsenterer først nogle generelle problemstillinger omkring Digital Humanities (DH) med det formål at undersøge dem nærmere i relation til konkrete eksempler på forskellige digitaliseringsmåder og ændringer i dokumentproduktion. I en nærmere afgrænsning vælger artiklen den tendens i DH...

  13. Fuel oil heating process and viscosity control system based on PI controllers; Proceso de calentamiento de combustoleo y sistema de control de viscosidad en base a controladores PI

    Energy Technology Data Exchange (ETDEWEB)

    Delgadillo Valencia, Miguel Angel; Dominguez Molina, Beatriz Adriana [Gerencia de Control e Instrumentacionn Instituto de Investigaciones Eletricas, Cuernavaca, Morelos (Mexico)]. E-mail: madv@iie.org.mx; ingbty@hotmail.com

    2010-11-15

    This job presents a mathematical development for evaluating the fuel oil viscosity from direct pressure drop measurement data in a piece of tube, the density of the oil and the oil flow at the main heater input of a conventional power plant. A group of curves obtained from different type of oils are presented in equation form which are used to interpolate the actual oil and to extend it to evaluate the corresponding temperature for the goal viscosity. This temperature is used as temperature setpoint for the proposed viscosity control system. A conventional plant main heater model is developed in order to carry out simulation tests for the viscosity control. Simulation tests are done in the Simulink of Matlab platform and graphs of runs are presented. [Spanish] Este trabajo presenta un desarrollo matematico para la evaluacion de la viscosidad del combustoleo a partir de datos de medicion directa de caida de presion en un tramo de tuberia, de la densidad y del flujo de combustible a la entrada del calentador principal de una central termoelectrica convencional. A traves de datos de diferentes tipos de combustible se presentaron un conjunto de curvas, representadas por ecuaciones, mediante las cuales se interpola la curva correspondiente al combustible actual y se proyecta para evaluar la temperatura correspondiente a la viscosidad objetivo; esta temperatura objetivo se utiliza despues como senal de punto de ajuste para el control de la viscosidad del combustible en un sistema de control propuesto. Para la realizacion de pruebas del control de viscosidad, se plantea el desarrollo del modelo del calentador principal de la central termoelectrica. Las corridas de simulacion se realizan en la plataforma de Simulink de Matlab y se presentan las graficas de dichas corridas.

  14. Digital citizens Digital nations: the next agenda

    NARCIS (Netherlands)

    A.W. (Bert) Mulder; M.W. (Martijn) Hartog

    2015-01-01

    DIGITAL CITIZENS CREATE A DIGITAL NATION Citizens will play the lead role as they – in the next phase of the information society – collectively create a digital nation. Personal adoption of information and communication technology will create a digital infrastructure that supports individual and

  15. Digital citizens Digital nations: the next agenda

    NARCIS (Netherlands)

    Mulder, A.W. (Bert); Hartog, M.W. (Martijn)

    2015-01-01

    DIGITAL CITIZENS CREATE A DIGITAL NATION Citizens will play the lead role as they – in the next phase of the information society – collectively create a digital nation. Personal adoption of information and communication technology will create a digital infrastructure that supports individual and col

  16. Analysis of Digital Power Plant MOD Statistics Management Subsystem%数字化电厂MOD统计管理子系统分析

    Institute of Scientific and Technical Information of China (English)

    贾莉

    2014-01-01

    Statistics management at present stage is not only to process the internal production and operation of power plant, but also realize the three functions of the statistics. The system analyzes the real time data, and provides economic decision-making for management departments at all levels through scientific analysis method.%现阶段统计管理工作不仅是对电厂内部生产经营情况进行加工整理,还能实现统计的三大职能,系统通过引入实时数据进行分析,并通过科学的分析方法,为各级管理部门提供经济决策。

  17. MESH网络在核电数字控制系统中的应用%Application of MESH Network in Digital Control System of Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    钟洋; 冯坚

    2016-01-01

    MESH network is applied in a nuclear power plant building by China for NC level-1 control system, which is based on IEEE 802.3u and IEEE 802.3z standards. Architecture and feature of the MESH control network is provided, basic MESH network topologies are also supported. To detect loops in the MESH network, LDP is implemented as a backup of RSTP, which can detect and recover from network loops within 1 second. The theory and algorithm of LDP is provided. Project of MESH network applied in the nuclear power plant is introduced.%目前国内在建的某核电站非安全级控制系统一层通讯采用了基于IEEE 802.3u和IEEE 802.3z标准的MESH网络。本文介绍了MESH网络的结构、特点和常用的冗余网络拓扑结构。为了管理网络路径,防止产生网络环路, MESH网络使用了LDP作为RSTP的备用方案,可以在1s内检测并排除网络环路产生的故障,提高了网络的稳定性和安全性。分析了LDP检测网络环路的原理及方法,结合该项目介绍了MESH网络配置方案。

  18. Digital pathology

    CERN Document Server

    Sucaet, Yves

    2014-01-01

    Digital pathology has experienced exponential growth, in terms of its technology and applications, since its inception just over a decade ago. Though it has yet to be approved for primary diagnostics, its values as a teaching tool, facilitator of second opinions and quality assurance reviews and research are becoming, if not already, undeniable. It also offers the hope of providing pathology consultant and educational services to under-served areas, including regions of the world that could not possibly sustain this level of services otherwise. And this is just the beginning, as its adoption b

  19. Focus: Digital

    DEFF Research Database (Denmark)

    Technology has been an all-important and defining element within the arts throughout the 20th century, and it has fundamentally changed the ways in which we produce and consume music. With this Focus we investigate the latest developments in the digital domain – and their pervasiveness and rapid...... production and reception of contemporary music and sound art. With ‘Digital’ we present four composers' very different answers to how technology impact their work. To Juliana Hodkinson it has become an integral part of her sonic writing. Rudiger Meyer analyses the relationships between art and design and how...

  20. Digital control for turbogas units; Control digital para unidades turbogas

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Beltran, Carlos Daniel

    1997-02-01

    The present thesis deals with the rehabilitation of the control system for the gas turbines W501 of the Gomez Palacio Combined Cycle Power Station in the state of Durango, Mexico. The first part of the development deals with a re-engineering process of software applied to the digital control system of the gas turbines of the Gomez Palacio Combined Cycle Power Station. This process was developed using concepts of several branches of engineering: a) involved the knowledge of the software engineering, using formal methods for the analysis of the original system and the redesign of the new system; b) The control engineering was used in the analysis of diverse control and automation strategies employed for gas turbines control, with the objective of verifying the type of instructions and existing routines within the software. The final product of this stage is a modulated programmatic system, based on structured design that is functionally a mirror image of the original system. The system obtained conformed by five main modules which are based on a model proposed originally for control by batch: i) Man Machine Interface, ii) Regulatory Control, iii) Protections, iv) Logic sequences and v) Supervision. The second stage of development was the improvement of the speed control of the turbine. When a turbogas unit is controlled, it must be taken into account several operation stages such as the starting, the control in stable state and the shut down. The real behavior of the turbine during the starting, and mainly the great number of backward movements produced, proposed by itself the search of a new controller who more closely maintained the acceleration specifications whereupon the turbine was designed. The development of a new control algorithm began with the analysis of the process, trying to identify which are the critical stages of this one and be able to evaluate in an objective form the advantages of an algorithm upon the other. It was continued with the

  1. Digital Humanities

    DEFF Research Database (Denmark)

    Nielsen, Hans Jørn

    2015-01-01

    overgangen fra trykkekultur til digital kultur. For det første problemstillingen omkring digitalisering af litterær kulturarv med fokus på kodning og tagging af teksten samt organisering i hypertekststrukturer. For det andet reorganiseringen af det digitale dokument i dataelementer og database. For det......, der betragter DH som forbundet med "making" og "building" af digitale objekter og former. Dette kan også karakteriseres som DH som praktisk-produktiv vending. Artiklen har valgt tre typer af digitalisering. De er valgt ud fra, at de skal repræsentere forskellige måder at håndtere digitaliseringen på...... og forskellige versioner af den praktisk-produktive vending. Artiklen undersøger tre typer digitalisering fra 1990erne til i dag ud fra denne optik. De repræsenterer forskellige former for approach til digitalisering og det digitale dokument og afspejler forskellige typer af problemstillinger i...

  2. Digital Avionics

    Science.gov (United States)

    Koelbl, Terry G.; Ponchak, Denise; Lamarche, Teresa

    2003-01-01

    Digital Avionics activities played an important role in the advancements made in civil aviation, military systems, and space applications. This document profiles advances made in each of these areas by the aerospace industry, NASA centers, and the U.S. military. Emerging communication technologies covered in this document include Internet connectivity onboard aircraft, wireless broadband communication for aircraft, and a mobile router for aircraft to communicate in multiple communication networks over the course of a flight. Military technologies covered in this document include avionics for unmanned combat air vehicles and microsatellites, and head-up displays. Other technologies covered in this document include an electronic flight bag for the Boeing 777, and surveillance systems for managing airport operations.

  3. Digital work in a digitally challenged organization

    NARCIS (Netherlands)

    Davison, R.M.; Ou, Carol

    2016-01-01

    Digitally literate employees are accustomed to having free access to digital media technologies. However, some organizations enact information technology (IT) governance structures that explicitly proscribe access to these technologies, resulting in considerable tension between employees and the org

  4. Digital work in a digitally challenged organization

    NARCIS (Netherlands)

    Davison, R.M.; Ou, Carol

    Digitally literate employees are accustomed to having free access to digital media technologies. However, some organizations enact information technology (IT) governance structures that explicitly proscribe access to these technologies, resulting in considerable tension between employees and the

  5. USNA DIGITAL FORENSICS LAB

    Data.gov (United States)

    Federal Laboratory Consortium — To enable Digital Forensics and Computer Security research and educational opportunities across majors and departments. Lab MissionEstablish and maintain a Digital...

  6. USNA DIGITAL FORENSICS LAB

    Data.gov (United States)

    Federal Laboratory Consortium — To enable Digital Forensics and Computer Security research and educational opportunities across majors and departments. Lab Mission Establish and maintain a Digital...

  7. Digital Marketer: Facing Digital Marketing Opportunities

    OpenAIRE

    NEGRICEA, Costel Iliuta; PURCAREA, Ioan Matei

    2015-01-01

    We are witnessing the emergence of new ecosystems thanks to digital disruption, marketers being challenged to bring marketing operations into the digital era, enhance the customer journey and shift consumer behavior with the help of the digital tools, while actively encouraging feedback from users, and building a circle of trust with the company’s audience. Recent findings showed clear differences of consumers’ preferences and of what marketers say they’re doing with digital technology. Respo...

  8. Uma contribuição pedagógica acerca da criação e utilização dos objetos de aprendizagem na capacitação do controlador de tráfego aéreo

    OpenAIRE

    Elaine Pires de Abreu

    2014-01-01

    Este trabalho trata do uso de objetos de aprendizagem (OA) na formação e treinamento continuado de controladores de tráfego aéreo. A capacitação das pessoas que trabalham no controle de tráfego aéreo é um importante fator de segurança operacional. Partindo das teorias de aprendizagem de adultos, colaborativa, significativa e multimídia, a pesquisa toma como referência as metodologias LODAS e ISD-ADDIE para propor um método inovador de desenvolvimento e utilização de OA para uso na formação e ...

  9. Diagnóstico do processo de capacitação em língua inglesa dos controladores de tráfego aéreo do 1GCC: análise do estado atual e sugestões para obtenção da proficiência

    OpenAIRE

    Dan Marshal Freitas

    2014-01-01

    A Organização de Aviação Civil Internacional (ICAO) recomendou a utilização da língua inglesa como padrão internacional nas comunicações ar-solo em 1951. Em 1998, sugeriu a realização de um estudo para a implantação de um teste de proficiência linguística para pilotos e controladores, pois havia, naquela época, alta ocorrência de incidentes e acidentes aeronáuticos gerados pela deficiente utilização da língua inglesa (CUSHING, 1994). Em 2004, foi publicado o Manual de Requisitos para Implemen...

  10. IMPLEMENTACIÓN DE UNA NUEVA TÉCNICA DE CONTROL DIGITAL PARA CONVERTIDORES DC-DC Y DC-AC

    Directory of Open Access Journals (Sweden)

    FREDY EDIMER HOYOS VELASCO

    2010-01-01

    Full Text Available En este trabajo se presentan resultados experimentales que confirman la validez de una nueva técnica de control digital, por modulación de ancho de pulso (PWMDigital, para convertidores de potencia DCDC y DCAC. El controlador PWMDigital combina el esquema de control por promedio cero de la dinámica del error (ZAD, ya reportado en la literatura, con el esquema de control por inducción al punto fijo (FPIC aún en fase de experimentación. El diseño ha sido validado experimentalmente, usando la plataforma digital DSpace , en convertidores DCDC y DCAC de baja potencia. Los diagramas de bifurcaciones, calculados numéricamente en la etapa de diseño, concuerdan en un alto porcentaje con los obtenidos en la etapa experimental. Cuando el sistema opera en zona estable se obtiene buen comportamiento a la salida (regulación en el caso DCDC y rastreo en el caso DCAC, con bajo error y rechazo a perturbaciones.

  11. Can We Teach Digital Natives Digital Literacy?

    Science.gov (United States)

    Ng, Wan

    2012-01-01

    In recent years, there has been much debate about the concept of digital natives, in particular the differences between the digital natives' knowledge and adoption of digital technologies in informal versus formal educational contexts. This paper investigates the knowledge about educational technologies of a group of undergraduate students…

  12. DIGITAL ARCHITECTURE PROJECT PLAN

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, Ken

    2014-09-01

    The objective of this project is to develop an industry consensus document on how to scope and implement the underlying information technology infrastructure that is needed to support a vast array of real-time digital technologies to improve NPP work efficiency, to reduce human error, to increase production reliability and to enhance nuclear safety. A consensus approach is needed because: • There is currently a wide disparity in nuclear utility perspectives and positions on what is prudent and regulatory-compliant for introducing certain digital technologies into the plant environment. For example, there is a variety of implementation policies throughout the industry concerning electromagnetic compatibility (EMC), cyber security, wireless communication coverage, mobile devices for workers, mobile technology in the control room, and so forth. • There is a need to effectively share among the nuclear operating companies the early experience with these technologies and other forms of lessons-learned. There is also the opportunity to take advantage of international experience with these technologies. • There is a need to provide the industry with a sense of what other companies are implementing, so that each respective company can factor this into their own development plans and position themselves to take advantage of new work methods as they are validated by the initial implementing companies. In the nuclear power industry, once a better work practice has been proven, there is a general expectation that the rest of the industry will adopt it. However, the long-lead time of information technology infrastructure could prove to be a delaying factor. A secondary objective of this effort is to provide a general understanding of the incremental investment that would be required to support the targeted digital technologies, in terms of an incremental investment over current infrastructure. This will be required for business cases to support the adoption of these new

  13. Adjustable control in the steam zone of a steam power plant; Control ajustable de la zona de vapor de una unidad termoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez Gallegos, Joaquin; Bourguet Diaz, Rafael Ernesto [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1990-12-31

    A general description is presented of self adjustable control systems, as well as of the design and its application for steam temperature regulation of a steam power plant unit model. The algorithm employed is a controller of minimum variance that ponders the output deviation as well as the control effort. The results are compared with the ones obtained in a conventional control scheme, showing in general a better performance in the conducted experiments. [Espanol] Se presenta una descripcion general de los sistemas de control autoajustable, asi como del diseno y su aplicacion para regular las temperaturas de vapor de un modelo de unidad termoelectrica. El algoritmo utilizado es un controlador de variancia minima que pondera tanto la desviacion de salida como el esfuerzo de control. Los resultados se comparan con los obtenidos en un esquema de control convencional, mostrando en general un mejor desempeno en los experimentos realizados.

  14. Modelos de simulação a eventos discretos como ambiente de treinamento em controle digital

    Directory of Open Access Journals (Sweden)

    Amanda Arêas de Souza

    2012-11-01

    Full Text Available O treinamento prático é parte fundamental no processo de ensino-aprendizagem em controle digital. A utilização de simuladores em aulas de automação tem se destacado recentemente de modo eficaz neste contexto. O presente trabalho descreve então dois modelos de simulação construídos para demonstrar a possibilidade de utilização de softwares de simulação a eventos discretos como um ambiente de treinamento de lógicas de controle automático de processos industriais em tempo real. Foi realizada a integração de um modelo de simulação construído com o software Arena recebendo sinal de comando de um Controlador Lógico Programável (CLP. O ambiente virtual proposto, oriundo do modelo de simulação, possibilitou a realização de diferentes testes de lógicas de controle. Os resultados deste trabalho demonstraram a clara possibilidade de interatividade do estudante com um modelo de simulação discreta para o treinamento prático com sistemas de controle automatizados.

  15. Define Digital Vernacular

    Institute of Scientific and Technical Information of China (English)

    刘佳; 李海英; James Stevens; Rough Nelson

    2014-01-01

    As science and technology developed, the tools of humans developed from humans’hands, to mechanical and digital technologies. The tools influ-ence almost everything in the humans’world, so does vernacular. The digital vernacular could be understood as using digital technology to vernacular; the digital means technologies. It also could be understood as doing vernacular in a digital way;the digital means data and information, in other words it can be seeking truth from facts. Define digital vernacular is not only what is digital vernacular, but also about how to do the digital vernacular and what kind of attitude we should hold to-ward the digital vernacular. Define digital vernacular as both thinking and doing.

  16. Analysis and Application of Nuclear Plant Safety Digital Control System Design Criteria%核电站安全级数字化仪控系统设计准则的分析与应用

    Institute of Scientific and Technical Information of China (English)

    姚光霖; 孙武

    2015-01-01

    Based on the China's nuclear power plant safety digital control system design criteria that the regulations and standards requirements, Analysis of the relationship between the design criteria and its practica-bility is presented.The design criteria are generally recapitulative and don't specify specific regulations or meth-ods, so the detailed methods which satisfy design criteria are established by comparison analysis and application of the design criteria.Through detailed study and application analysis of the design criteria based on Triconex platform for safety-class I&C system, the rationality of established methods are verified.%基于我国核电站安全级数字化仪控系统设计中采用的法规、标准所要求的设计准则,分析各设计准则之间的相互关系及可实施性;设计准则通常概括性强且未给出具体的实施细则或方法,通过对比分析各设计准则的具体要求以及它们在实践中的应用,归纳出更加细化的满足设计准则的实现方法。并通过对主要设计准则在基于Triconex平台的安全级数字化仪控系统中的详细研究和应用分析,验证本文归纳出的实现方法的合理性。

  17. Mapping of quantitative trait loci for thermosensitive genic male sterility in indica rice Mapeamento de controladores de caracteres quantitativos de macho-esterilidade gênica termossensível em arroz indica

    Directory of Open Access Journals (Sweden)

    Antonio Alberto Neves de Alcochete

    2005-12-01

    (14,65%, e a seleção zigótica foi apontada como causa da distorção. Não houve evidência de relação de causa-efeito entre a seleção zigótica e o controle de TGMS nesse cruzamento. Um mapa de ligação com 1.213,3 cM foi construído, baseado nos dados de segregação da população F2. Noventa e cinco marcadores microssatélites, de um total de 116 marcadores polimórficos, foram reunidos em 11 grupos de ligação, com uma média de 12,77 cM entre os locos marcadores adjacentes. Os dados fenotípicos e genotípicos permitiram a identificação de três novos locos controladores de caracteres quantitativos (QTL para a macho-esterilidade gênica termossensível em arroz indica. Dois dos QTLs foram mapeados em cromossomos que não tinham, ainda, sido associados ao controle genético da característica TGMS (cromossomos 1 e 12. O terceiro QTL foi mapeado no cromossomo 7, onde um loco TGMS (tms2 foi recentemente mapeado. Testes alélicos deverão ser realizados para verificar se as regiões mapeadas são as mesmas.

  18. Digital forensics digital evidence in criminal investigations

    CERN Document Server

    Marshall, Angus McKenzie

    2009-01-01

    The vast majority of modern criminal investigations involve some element of digital evidence, from mobile phones, computers, CCTV and other devices. Digital Forensics: Digital Evidence in Criminal Investigations provides the reader with a better understanding of how digital evidence complements "traditional" scientific evidence and examines how it can be used more effectively and efficiently in a range of investigations. Taking a new approach to the topic, this book presents digital evidence as an adjunct to other types of evidence and discusses how it can be deployed effectively in s

  19. Digital dannelse

    DEFF Research Database (Denmark)

    Bundsgaard, Jeppe

    2012-01-01

    I al vores iver efter at få presset nogle flere digitale dimser ind i skolen, er vi i fare for at glemme hvad det er vi skal med disse dimser. Der er store forventninger til at de kan gøre det lettere at være lærer (og dermed billigere), og det kan det måske. Men der er jo også et dannelsesspørgs......I al vores iver efter at få presset nogle flere digitale dimser ind i skolen, er vi i fare for at glemme hvad det er vi skal med disse dimser. Der er store forventninger til at de kan gøre det lettere at være lærer (og dermed billigere), og det kan det måske. Men der er jo også et...... dannelsesspørgsmål knyttet til it. Hvad er egentlig digital dannelse? Og hvad betyder det for danskfaget?...

  20. Digital platforms as enablers for digital transformation

    DEFF Research Database (Denmark)

    Hossain, Mokter; Lassen, Astrid Heidemann

    2017-01-01

    Digital platforms offer new ways for organizations to collaborate with the external environment for ideas, technologies, and knowledge. They provide new possibilities and competence but they also bring new challenges for organizations. Understanding the role of these platforms in digital...... transformation is crucial. This study aims at exploring how organizations are driven towards transformation in various ways to embrace digital platforms for ideas, technologies, and knowledge. It shows the opportunities and challenges digital platforms bring in organizations. It also highlights underlying...... mechanisms and potential outcomes of various digital platforms. The contribution of the submission is valuable for scholars to understand and further explore this area. It provides insight for practitioners to capture value through digital platforms and accelerate the pace of organizations’ digital...

  1. H. Sapiens Digital: From Digital Immigrants and Digital Natives to Digital Wisdom

    Science.gov (United States)

    Prensky, Marc

    2009-01-01

    As we move further into the 21st century, the digital native/digital immigrant paradigm created by Marc Prensky in 2001 is becoming less relevant. In this article, Prensky suggests that we should focus instead on the development of what he calls "digital wisdom." Arguing that digital technology can make us not just smarter but truly wiser, Prensky…

  2. Controlador de gastos para dispositivos Android

    OpenAIRE

    2012-01-01

    Este proyecto fin de carrera consiste en desarrollar una aplicación Android gestora de las finanzas personales que permita llevar un control exhaustivo de nuestros gastos y nuestros ingresos. Para poder diversificar cada una de las transacciones se han establecido diversos conceptos como cuentas, categorías o localizaciones. Las cuentas, así como las transacciones, son parte fundamental de la aplicación pues con ellas se establece una separación de nuestras finanzas. Las localizaciones, po...

  3. Enabling Digital Literacy

    DEFF Research Database (Denmark)

    Ryberg, Thomas; Georgsen, Marianne

    2010-01-01

    There are some tensions between high-level policy definitions of “digital literacy” and actual teaching practice. We need to find workable definitions of digital literacy; obtain a better understanding of what digital literacy might look like in practice; and identify pedagogical approaches, which......, these operate on a meso-level mediating between high-level concepts of digital literacy and classroom practice....... support teachers in designing digital literacy learning. We suggest that frameworks such as Problem Based Learning (PBL) are approaches that enable digital literacy learning because they provide good settings for engaging with digital literacy. We illustrate this through analysis of a case. Furthermore...

  4. Digital signal processing: Handbook

    Science.gov (United States)

    Goldenberg, L. M.; Matiushkin, B. D.; Poliak, M. N.

    The fundamentals of the theory and design of systems and devices for the digital processing of signals are presented. Particular attention is given to algorithmic methods of synthesis and digital processing equipment in communication systems (e.g., selective digital filtering, spectral analysis, and variation of the signal discretization frequency). Programs for the computer-aided analysis of digital filters are described. Computational examples are presented, along with tables of transfer function coefficients for recursive and nonrecursive digital filters.

  5. Digital preservation for heritages

    CERN Document Server

    Lu, Dongming

    2011-01-01

    ""Digital Preservation for Heritages: Technologies and Applications"" provides a comprehensive and up-to-date coverage of digital technologies in the area of cultural heritage preservation, including digitalization, research aiding, conservation aiding, digital exhibition, and digital utilization. Processes, technical frameworks, key technologies, as well as typical systems and applications are discussed in the book. It is intended for researchers and students in the fields of computer science and technology, museology, and archaeology. Dr. Dongming Lu is a professor at College of Computer Sci

  6. Characteristics of Digital Sustainability

    OpenAIRE

    Stuermer, Matthias

    2014-01-01

    The concept of digital sustainability is mentioned in research on digital preservation as well as on openness topics. Both streams of literature point out the necessary discussion how to create, use, and regulate digital resources in order to maximize their value for our society today and in the future. This paper therefore reviews current work on digital sustainability, presents a list of six charac-teristics how to define digitally sustainable goods, and draws the link to aspects of e-gover...

  7. Cognitive Hacking and Digital Government: Digital Identity

    OpenAIRE

    Paul Thompson

    2004-01-01

    Recently the National Center for Digital Government held a workshop on "The Virtual Citizen: Identity, Autonomy, and Accountability: A Civic Scenario Exploration of the Role of Identity in On-Line. Discussions at the workshop focused on five scenarios for future authentication policies with respect to digital identity. The underlying technologies considered for authentication were: biometrics: cryptography, with a focus on digital signatures; secure processing/computation; and reputation syst...

  8. Digital Archive Policies and Trusted Digital Repositories

    Directory of Open Access Journals (Sweden)

    MacKenzie Smith

    2007-07-01

    Full Text Available The MIT Libraries, the San Diego Supercomputer Center, and the University of California San Diego Libraries are conducting the PLEDGE Project to determine the set of policies that affect operational digital preservation archives and to develop standardized means of recording and enforcing them using rules engines. This has the potential to allow for automated assessment of “trustworthiness” of digital preservation archives. We are also evaluating the completeness of other efforts to define policies for digital preservation such as the RLG/NARA Trusted Digital Repository checklist and the PREMIS metadata schema. We present our results to date.

  9. Logic of the digital

    CERN Document Server

    Evens, Aden

    2015-01-01

    Building a foundational understanding of the digital, Logic of the Digital reveals a unique digital ontology. Beginning from formal and technical characteristics, especially the binary code at the core of all digital technologies, Aden Evens traces the pathways along which the digital domain of abstract logic encounters the material, human world. How does a code using only 0s and 1s give rise to the vast range of applications and information that constitutes a great and growing portion of our world? Evens' analysis shows how any encounter between the actual and the digital must cross an ontolo

  10. Digital set point control of nonlinear stochastic systems

    Science.gov (United States)

    Moose, R. L.; Vanlandingham, H. F.; Zwicke, P. E.

    1978-01-01

    A technique for digital control of nonlinear stochastic plants is presented. The development achieves a practical digital algorithm with which the closed-loop system behaves in a classical Type I manner even with gross nonlinearities in the plant structure and low signal-to-noise power ratios. The design procedure is explained in detail and illustrated by an example whose simulated responses testify to the practicality of the approach.

  11. Digital I and C system upgrade integration technique

    Energy Technology Data Exchange (ETDEWEB)

    Huang, H. W. [Inst. of Nuclear Energy Research (INER), No. 1000, Wenhua Road, Chiaan Village, Longtan Township, Taoyuan County, 32546, Taiwan (China); Shih, C. [Inst. of Nuclear Engineering and Science, National Tsing Hua Univ., 101, Sec. 2, Kuang Fu Rd, Hsinchu, Taiwan (China); Wang, J. R. [Inst. of Nuclear Energy Research (INER), No. 1000, Wenhua Road, Chiaan Village, Longtan Township, Taoyuan County, 32546, Taiwan (China); Huang, K. C. [Inst. of Nuclear Engineering and Science, National Tsing Hua Univ., 101, Sec. 2, Kuang Fu Rd, Hsinchu, Taiwan (China)

    2012-07-01

    This work developed an integration technique for digital I and C system upgrade, the utility can replace the I and C systems step by step systematically by this method. Inst. of Nuclear Energy Research (INER) developed a digital Instrumentation and Control (I and C) replacement integration technique on the basis of requirement of the three existing nuclear power plants (NPPs), which are Chin-Shan (CS) NPP, Kuo-Sheng (KS) NPP, and Maanshan (MS) NPP, in Taiwan, and also developed the related Critical Digital Review (CDR) Procedure. The digital I and C replacement integration technique includes: (I) Establishment of Nuclear Power Plant Digital Replacement Integration Guideline, (2) Preliminary Investigation on I and C System Digitalization, (3) Evaluation on I and C System Digitalization, and (4) Establishment of I and C System Digitalization Architectures. These works can be a reference for performing I and C system digital replacement integration of the three existing NPPs of Taiwan Power Company (TPC). A CDR is the review for a critical system digital I and C replacement. The major reference of this procedure is EPRI TR- 1011710 (2005) 'Handbook for Evaluating Critical Digital Equipment and Systems' which was published by the Electric Power Research Inst. (EPRI). With this document, INER developed a TPC-specific CDR procedure. Currently, CDR becomes one of the policies for digital I and C replacement in TPC. The contents of this CDR procedure include: Scope, Responsibility, Operation Procedure, Operation Flow Chart, CDR review items. The CDR review items include the comparison of the design change, Software Verification and Validation (SVandV), Failure Mode and Effects Analysis (FMEA), Evaluation of Diversity and Defense-in-depth (D3), Evaluation of Watchdog Timer, Evaluation of Electromagnetic Compatibility (EMC), Evaluation of Grounding for System/Component, Seismic Evaluation, Witness and Inspection, Lessons Learnt from the Digital I and C Failure

  12. Digital Systems Security in the nuclear scope; Sistemas Digitales de Seguridad en el ambito nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Amado, I.

    2011-07-01

    Overall nuclear power plants and in particular the Spanish, work well, but to modernize and improve the operation of existing Spanish plants, perhaps the natural evolution is to use digital technologies.

  13. On the digital homology groups of digital images

    CERN Document Server

    Lee, Dae-Woong

    2011-01-01

    In this article we study the digital homology groups of digital images which are based on the singular homology groups of topological spaces in algebraic topology. Specifically, we define a digitally standard $n$-simplex, a digitally singular $n$-simplex, and the digital homology groups of digital images with $k$-adjacency relations. We then construct a covariant functor from a category of digital images and digitally continuous functions to the one of abelian groups and group homomorphisms, and investigate some fundamental and interesting properties of digital homology groups of digital images, such as the digital version of the dimension axiom which is one of the Eilenberg-Steenrod axioms.

  14. Digital rectal exam

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/article/007069.htm Digital rectal exam To use the sharing features on this page, please enable JavaScript. A digital rectal exam is an examination of the lower ...

  15. Identidad visual digital

    OpenAIRE

    Pérez Villanueva, Alba

    2013-01-01

    Se estudian seis casos de empresas de diferentes sectores y la adaptación de la identidad visual digital para obtener una imagen aproximada sobre el estado de la identidad visual digital de las coporaciones

  16. Coastal California Digital Imagery

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This digital ortho-imagery dataset is a survey of coastal California. The project area consists of approximately 3774 square miles. The project design of the digital...

  17. About group digital signatures

    National Research Council Canada - National Science Library

    Adriana Cristina Enache

    2012-01-01

    ...).A group digital signature is a digital signature with enhanced privacy features that allows members of a given group to anonymously sign messages on behalf of the group, producing a group signature...

  18. Digital Inkjet Textile Printing

    OpenAIRE

    Wang, Meichun

    2017-01-01

    Digital inkjet textile printing is an emerging technology developed with the rise of the digital world. It offers a possibility to print high-resolution images with unlimited color selection on fabrics. Digital inkjet printing brings a revolutionary chance for the textile printing industry. The history of textile printing shows the law how new technology replaces the traditional way of printing. This indicates the future of digital inkjet textile printing is relatively positive. Differen...

  19. Basic digital signal processing

    CERN Document Server

    Lockhart, Gordon B

    1985-01-01

    Basic Digital Signal Processing describes the principles of digital signal processing and experiments with BASIC programs involving the fast Fourier theorem (FFT). The book reviews the fundamentals of the BASIC program, continuous and discrete time signals including analog signals, Fourier analysis, discrete Fourier transform, signal energy, power. The text also explains digital signal processing involving digital filters, linear time-variant systems, discrete time unit impulse, discrete-time convolution, and the alternative structure for second order infinite impulse response (IIR) sections.

  20. Digital dannelse til gymnasieeleverne

    DEFF Research Database (Denmark)

    Kaarsted, Thomas; Holch Andersen, Knud

    2012-01-01

    Søsætningen af en ny tænketank skal udstikke nye digital retningslinjer for gymnasiekolerne. Baggrunden er en erkendelse af, at it-infrastruktur og digital teknologi ikke gør de alene.......Søsætningen af en ny tænketank skal udstikke nye digital retningslinjer for gymnasiekolerne. Baggrunden er en erkendelse af, at it-infrastruktur og digital teknologi ikke gør de alene....

  1. Digital flight control research

    Science.gov (United States)

    Potter, J. E.; Stern, R. G.; Smith, T. B.; Sinha, P.

    1974-01-01

    The results of studies which were undertaken to contribute to the design of digital flight control systems, particularly for transport aircraft are presented. In addition to the overall design considerations for a digital flight control system, the following topics are discussed in detail: (1) aircraft attitude reference system design, (2) the digital computer configuration, (3) the design of a typical digital autopilot for transport aircraft, and (4) a hybrid flight simulator.

  2. Online Digital Trading

    Directory of Open Access Journals (Sweden)

    Felician Alecu

    2013-09-01

    Full Text Available This paper summarizes the main options a digital content creator has in order to obtain money by online trading of digital works. There are multiple ways to get paid for the digital products, like licensing, for example, however this article tries to present the most successful business models targeting the online market. The exclusive rights stated by the copyright laws are helping the authors to maximize to potential advantages coming from their digital creations.

  3. Interactive Digital Signal Processor

    Science.gov (United States)

    Mish, W. H.

    1985-01-01

    Interactive Digital Signal Processor, IDSP, consists of set of time series analysis "operators" based on various algorithms commonly used for digital signal analysis. Processing of digital signal time series to extract information usually achieved by applications of number of fairly standard operations. IDSP excellent teaching tool for demonstrating application for time series operators to artificially generated signals.

  4. Digital Literacy. Research Brief

    Science.gov (United States)

    Williamson, Ronald

    2011-01-01

    21st Century students need a complex set of skills to be successful in a digital environment. Digital literacy, similar to traditional definitions of literacy, is a set of skills students use to locate, organize, understand, evaluate and create information. The difference is that it occurs in an environment where a growing set of digital tools…

  5. Personal Digital Video Stories

    DEFF Research Database (Denmark)

    Ørngreen, Rikke; Henningsen, Birgitte Sølbeck; Louw, Arnt Vestergaard

    2016-01-01

    agenda focusing on video productions in combination with digital storytelling, followed by a presentation of the digital storytelling features. The paper concludes with a suggestion to initiate research in what is identified as Personal Digital Video (PDV) Stories within longitudinal settings, while...

  6. Digital language death.

    Directory of Open Access Journals (Sweden)

    András Kornai

    Full Text Available Of the approximately 7,000 languages spoken today, some 2,500 are generally considered endangered. Here we argue that this consensus figure vastly underestimates the danger of digital language death, in that less than 5% of all languages can still ascend to the digital realm. We present evidence of a massive die-off caused by the digital divide.

  7. Behandlingseffekt af Digital Dermatitis

    DEFF Research Database (Denmark)

    Krogh, Kenneth; Thomsen, Peter

    2008-01-01

    af klovlidelser herunder især Digital Dermatitis. Klovregistreringerne viser, at der er stor dynamik og mange nyinfektioner af Digital Dermatitis svarende til problematikken ved mastitis. Behandlingseffekten ved Digital Dermatitis er høj (omkring 90 %) ved den udførte behandling. Behandlingen bestod...

  8. Digitization in Maritime Industry

    DEFF Research Database (Denmark)

    Constantiou, Ioanna; Shollo, Arisa; Kreiner, Kristian

    2017-01-01

    Digitization in the maritime industry is expected to transform businesses. The recently introduced mobile technologies in inter-organizational processes is an example of digitization in an industry which moves very slowly towards digital transformation. We focus on the influence of mobile...

  9. Behandlingseffekt af Digital Dermatitis

    DEFF Research Database (Denmark)

    Krogh, Kenneth; Thomsen, Peter

    2008-01-01

    af klovlidelser herunder især Digital Dermatitis. Klovregistreringerne viser, at der er stor dynamik og mange nyinfektioner af Digital Dermatitis svarende til problematikken ved mastitis. Behandlingseffekten ved Digital Dermatitis er høj (omkring 90 %) ved den udførte behandling. Behandlingen bestod...

  10. Reconceptualising Critical Digital Literacy

    Science.gov (United States)

    Pangrazio, Luciana

    2016-01-01

    While it has proved a useful concept during the past 20 years, the notion of "critical digital literacy" requires rethinking in light of the fast-changing nature of young people's digital practices. This paper contrasts long-established notions of "critical digital literacy" (based primarily around the critical consumption of…

  11. Reconceptualising Critical Digital Literacy

    Science.gov (United States)

    Pangrazio, Luciana

    2016-01-01

    While it has proved a useful concept during the past 20 years, the notion of "critical digital literacy" requires rethinking in light of the fast-changing nature of young people's digital practices. This paper contrasts long-established notions of "critical digital literacy" (based primarily around the critical consumption of…

  12. Preparing collections for digitization

    CERN Document Server

    Bulow, Anna E

    2010-01-01

    Most libraries, archives and museums are confronting the challenges of providing digital access to their collections. This guide offers guidance covering the end-to-end process of digitizing collections, from selecting records for digitization to choosing suppliers and equipment and dealing with documents that present individual problems.

  13. Digital subtraction laryngography

    Energy Technology Data Exchange (ETDEWEB)

    Brown, B.W.; Enzmann, D.R.; Hopp, M.L.; Castellino, R.A.

    1983-06-01

    Digital subtraction laryngography was used to evaluate laryngeal function in 8 patients: 4 with normal larynxes and 4 with laryngeal disease. Subtracted digital images provided a dynamic display of the extent and symmetry of vocal cord excursions and pyriform sinus inflation, and the vocal cord resting position was also clearly depicted. The technical details of digital subtraction laryngography and its application are described.

  14. Digital Tectonic Tools

    DEFF Research Database (Denmark)

    Schmidt, Anne Marie Due

    2005-01-01

    in particular. A model of the aspects in the term tectonics – epresentation, ontology and culture – will be presented and used to discuss the current digital tools’ ability in tectonics. Furthermore it will be discussed what a digital tectonic tool is and could be and how a connection between the digital...

  15. Light Water Reactor Sustainability Program. Digital Architecture Requirements

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, Kenneth [Idaho National Lab. (INL), Idaho Falls, ID (United States); Oxstrand, Johanna [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2015-03-01

    The Digital Architecture effort is a part of the Department of Energy (DOE) sponsored Light-Water Reactor Sustainability (LWRS) Program conducted at Idaho National Laboratory (INL). The LWRS program is performed in close collaboration with industry research and development (R&D) programs that provides the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants (NPPs). One of the primary missions of the LWRS program is to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. Therefore, a major objective of the LWRS program is the development of a seamless digital environment for plant operations and support by integrating information from plant systems with plant processes for nuclear workers through an array of interconnected technologies. In order to get the most benefits of the advanced technology suggested by the different research activities in the LWRS program, the nuclear utilities need a digital architecture in place to support the technology. A digital architecture can be defined as a collection of information technology (IT) capabilities needed to support and integrate a wide-spectrum of real-time digital capabilities for nuclear power plant performance improvements. It is not hard to imagine that many processes within the plant can be largely improved from both a system and human performance perspective by utilizing a plant wide (or near plant wide) wireless network. For example, a plant wide wireless network allows for real time plant status information to easily be accessed in the control room, field workers’ computer-based procedures can be updated based on the real time plant status, and status on ongoing procedures can be incorporated into smart schedules in the outage command center to allow for more accurate planning of critical tasks. The goal

  16. Ageing and digital games

    DEFF Research Database (Denmark)

    Iversen, Sara Mosberg

    2016-01-01

    Digital games are still to a great degree considered a medium mainly for young boys. However, available statistics on Western media use show that this is far from the case. Increasingly, people of all ages and genders play digital games, also older adults in their early 60s and beyond. The aim...... of the book is to examine, analyse and discuss: 1) What older adults do with digital games and what meanings the use of digital games take on in the everyday life of older adults; 2) How older adults are perceived by society in relation to digital games; 3) How play and games can be used both...

  17. Digital Living at Home

    DEFF Research Database (Denmark)

    Andersen, Pernille Viktoria Kathja; Christiansen, Ellen Tove

    2013-01-01

    Does living with digital technology inevitably lead to digital living? Users talking about a digital home control system, they have had in their homes for eight years, indicate that there is more to living with digital technology than a functional-operational grip on regulation. Our analysis...... of these user voices has directed us towards a ‘home-keeping’ design discourse, which opens new horizons for design of digital home control systems by allowing users to perform as self-determined controllers and groomers of their habitat. The paper concludes by outlining the implications of a ‘home...

  18. Digitalizing the Circular Economy

    Science.gov (United States)

    Reuter, Markus A.

    2016-12-01

    Metallurgy is a key enabler of a circular economy (CE), its digitalization is the metallurgical Internet of Things (m-IoT). In short: Metallurgy is at the heart of a CE, as metals all have strong intrinsic recycling potentials. Process metallurgy, as a key enabler for a CE, will help much to deliver its goals. The first-principles models of process engineering help quantify the resource efficiency (RE) of the CE system, connecting all stakeholders via digitalization. This provides well-argued and first-principles environmental information to empower a tax paying consumer society, policy, legislators, and environmentalists. It provides the details of capital expenditure and operational expenditure estimates. Through this path, the opportunities and limits of a CE, recycling, and its technology can be estimated. The true boundaries of sustainability can be determined in addition to the techno-economic evaluation of RE. The integration of metallurgical reactor technology and systems digitally, not only on one site but linking different sites globally via hardware, is the basis for describing CE systems as dynamic feedback control loops, i.e., the m-IoT. It is the linkage of the global carrier metallurgical processing system infrastructure that maximizes the recovery of all minor and technology elements in its associated refining metallurgical infrastructure. This will be illustrated through the following: (1) System optimization models for multimetal metallurgical processing. These map large-scale m-IoT systems linked to computer-aided design tools of the original equipment manufacturers and then establish a recycling index through the quantification of RE. (2) Reactor optimization and industrial system solutions to realize the "CE (within a) Corporation—CEC," realizing the CE of society. (3) Real-time measurement of ore and scrap properties in intelligent plant structures, linked to the modeling, simulation, and optimization of industrial extractive process

  19. Digital Radiation image

    Directory of Open Access Journals (Sweden)

    Abou-Bakr Ramadan

    2012-03-01

    Full Text Available This work introduces a new way for data visualization. Its name is Digital Application name' Image. Normal digital image is created by digital camera or digital scanner but digital application name image is created by measurements of monitoring data. This work uses the data which is measured by radiation monitoring station and classifies it using fuzzy logic rules to create digital radiation image. The main unique advantage of digital radiation image is that it expresses thousands of measurements in a very clear form through only one picture while the maximum number of measurements does not exceed 100 with other conventional visualization methods. This feature gives a facility to view one year of all recorded measurements in only one photo. This picture helps the user to observe the behavior of thousands of measurements in few minutes instead of spending few hours for reviewing hundreds of charts for the same measurements.

  20. Digital gaming expertise

    DEFF Research Database (Denmark)

    Toft-Nielsen, Claus

    , to have access to the dynamic power systems in and around digital games theorized as ‘gaming capital’ (Consalvo, 2007) and who cannot? I argue, in other words, for an understanding of digital gaming competence as a reflection, negotiation, and production of gendered power relations, performed in ways......In a digitally saturated environment digital media users of all kinds, engaged in different areas of activity, are increasingly categorized in terms of their ability to appropriate and use digital media – they are regarded as non-users, experts, natives, or literates for instance. Within...... communication and game studies there are multiple understandings of how digital expertise is expressed and performed, and subsequently how these expressions and performances can be valued, understood and theorized within the research community. Among other things expertise with and within digital games has...

  1. Digital Collections, Digital Libraries and the Digitization of Cultural Heritage Information.

    Science.gov (United States)

    Lynch, Clifford

    2002-01-01

    Discusses the development of digital collections and digital libraries. Topics include digitization of cultural heritage information; broadband issues; lack of compelling content; training issues; types of materials being digitized; sustainability; digital preservation; infrastructure; digital images; data mining; and future possibilities for…

  2. Immunizing digital systems against electromagnetic interference

    Science.gov (United States)

    Ewing, P. D.; Korsah, K.; Antonescu, C.

    This paper discusses the development of the technical basis for acceptance criteria applicable to the immunization of digital systems against electromagnetic interference (EMI). The work is sponsored by the US Nuclear Regulatory Commission and stems from the safety-related issues that need to be addressed as a result of the application of digital instrumentation and control systems in nuclear power plants. Designers of digital circuits are incorporating increasingly higher clock frequencies and lower logic level voltages, thereby leading to potentially greater susceptibility of spurious interference being misinterpreted as legitimate logic. Development of the technical basis for acceptance criteria to apply to these digital systems centers around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant's electronic and electromechanical systems. First, good EMC design and installation practices are needed to control the emissions from interference sources and thereby their impact on other nearby circuits and systems. Secondly, a test and evaluation program is needed to outline the EMI tests to be performed, the associated test methods to be followed, and adequate test limits to ensure that the circuit or system under test meets the recommended guidelines. Test and evaluation should be followed by periodic maintenance to assess whether the recommended EMI control practices continue to be adhered to as part of the routine operation of the nuclear power plant. By following these steps, the probability of encountering safety-related instrumentation problems associated with EMI will be greatly reduced.

  3. Digital rights management for digital cinema

    Science.gov (United States)

    Kirovski, Darko; Peinado, Marcus; Petitcolas, Fabien A. P.

    2001-12-01

    There is a wide consensus among the feature film production studios that the Internet era brings a new paradigm for film distribution to cinemas worldwide. The benefits of digital cinema to both producers and cinemas are numerous: significantly lower distribution and maintenance costs, immediate access to film libraries, higher presentation quality, and strong potential for developing new business models. Despite these advantages, the studios are still reluctant to jump into the digital age. The main showstopper for digital cinema is the danger of widespread piracy. Piracy already costs Hollywood an estimated two billion dollars annually and digital cinema without proper copyright enforcement could increase this number. In this paper, we present a copyright management system that aims at providing the set of necessary security tools: standard cryptographic primitives and copyright protection mechanisms that enable a reliable and secure feature film delivery system.

  4. Best of Digital British Columbia : Digitization Around the Province

    OpenAIRE

    2011-01-01

    The Online Dictionary of Library and Information Science defines digitization as “the process of converting data to digital format for processing by a computer.” We have all heard about mass digitization projects such as the Google Digitization Project and Project Gutenberg, but local ’boutique’ digitization efforts do not receive as much fanfare. Digitization projects completed in BC showcase the unique culture and history of British Columbia. The BC Digitization Coalition is a new initiativ...

  5. Digital System Reliability Test for the Evaluation of safety Critical Software of Digital Reactor Protection System

    Directory of Open Access Journals (Sweden)

    Hyun-Kook Shin

    2006-08-01

    Full Text Available A new Digital Reactor Protection System (DRPS based on VME bus Single Board Computer has been developed by KOPEC to prevent software Common Mode Failure(CMF inside digital system. The new DRPS has been proved to be an effective digital safety system to prevent CMF by Defense-in-Depth and Diversity (DID&D analysis. However, for practical use in Nuclear Power Plants, the performance test and the reliability test are essential for the digital system qualification. In this study, a single channel of DRPS prototype has been manufactured for the evaluation of DRPS capabilities. The integrated functional tests are performed and the system reliability is analyzed and tested. The results of reliability test show that the application software of DRPS has a very high reliability compared with the analog reactor protection systems.

  6. Seizing the Digital

    Directory of Open Access Journals (Sweden)

    Janet Vertesi

    2016-07-01

    Full Text Available Digital systems pervade classic STS sites of interest, from connecting laboratories to mediating lay-expert divides. But STS has so far been reticent to build the theoretical and analytical perspectives necessary for embracing digital systems as an important element of contemporary fieldwork, research, and practice. This paper charts a course for bringing STS concepts to bear on digital systems and vice versa, bringing our lingering concern with questions from the sociology of knowledge to bear on digitally-enacted and mediated scientific and technical practices. It shows how we can eschew the language of technological determinism inherent to discussion about digital systems outside of STS, asking instead questions germane to STS theory and practice such as the configuration of such systems to include and exclude, the epistemic entanglements of using digital tools in research practice, and the potential to build new systems that suggest alternative arrangements.

  7. DIGITAL ERA: UTILIZE OF CLOUD COMPUTING TECHNOLOGY IN DIGITAL LIBRARY

    OpenAIRE

    T. RAGHUNADHA REDDY

    2012-01-01

    With the purpose of applying cloud computing to digital library, the paper initially describes cloud computing and analyzes current status of cloud computing in digital library. Then it proposes the architecture of cloud computing in digital library and summarises the application of cloud computing in digital library. Finally the author brings out the future improvement in digital library using cloud computing technology.

  8. Digital Natives and Digital Divide: Analysing Perspective for Emerging Pedagogy

    Science.gov (United States)

    Onye, Uriel U.; Du, Yunfei

    2016-01-01

    This paper addresses the concepts of digital natives and digital divide from the perspective of the digital outsiders (part of digital natives). It takes a critical look at the implications of available ICT in both developed and underdeveloped countries in the fight against digital divide. The major contribution to literature is by drawing…

  9. Preserving Digital Materials

    CERN Document Server

    Harvey, Ross

    2011-01-01

    This book provides a single-volume introduction to the principles, strategies and practices currently applied by librarians and recordkeeping professionals to the critical issue of preservation of digital information. It incorporates practice from both the recordkeeping and the library communities, taking stock of current knowledge about digital preservation and describing recent and current research, to provide a framework for reflecting on the issues that digital preservation raises in professional practice.

  10. The digital computer

    CERN Document Server

    Parton, K C

    2014-01-01

    The Digital Computer focuses on the principles, methodologies, and applications of the digital computer. The publication takes a look at the basic concepts involved in using a digital computer, simple autocode examples, and examples of working advanced design programs. Discussions focus on transformer design synthesis program, machine design analysis program, solution of standard quadratic equations, harmonic analysis, elementary wage calculation, and scientific calculations. The manuscript then examines commercial and automatic programming, how computers work, and the components of a computer

  11. Digital image scrambling

    Institute of Scientific and Technical Information of China (English)

    丁玮; 闫伟齐; 齐东旭

    2001-01-01

    The purpose of digital image scrambling is to transforn a given digital image into a rather scrambled one so as to make it difficult for other people to find out the true meaning of the scrambled image. This paper comes up with a certain number of approaches to scrambling digital images, which, when thus processed, cannot be reconstructed in a common way. As a result, the original image is enc yrypted and protected.

  12. Digital Textile Printing

    OpenAIRE

    Moltchanova, Julia

    2011-01-01

    Rapidly evolving technology of digital printing opens new opportunities on many markets. One of them is the printed fabric market where printing companies as well as clients benefit from new printing methods. This thesis focuses on the digital textile printing technology and its implementation for fabric-on-demand printing service in Finland. The purpose of this project was to study the technology behind digital textile printing, areas of application of this technology, the requirements ...

  13. Digitally Financed Energy

    OpenAIRE

    Waldron, Daniel; Faz, Xavier

    2016-01-01

    The expansion of digital finance systems in the developing world has altered this financial context and enabled new business models that rely on small, regular payments. In the off-grid energy sector a group of solar companies, primarily in East Africa and South Asia, are leveraging digital finance to offer pay-as-you-go (PAYG) energy. This brief explains how digital finance is enabling PA...

  14. Emergence of Digital Twins

    OpenAIRE

    Datta, Shoumen Palit Austin

    2016-01-01

    Multiple forms of digital transformation are imminent. Digital Twins represent one concept. It is gaining momentum because it may offer real-time transparency. Rapid diffusion of digital duplicates faces hurdles due to lack of semantic interoperability between architectures, standards and ontologies. The technologies necessary for automated discovery are in short supply. Progression of the field depends on convergence of information technology, operational technology and protocol-agnostic tel...

  15. Digital piracy: Theory

    OpenAIRE

    Belleflamme, Paul; Peitz, Martin

    2010-01-01

    This article reviews recent theoretical contributions on digital piracy. It starts by elaborating on the reasons for intellectual property protection, by reporting a few facts about copyright protection, and by examining reasons to become a digital pirate. Next, it provides an exploration of the consequences of digital piracy, using a base model and several extensions (with consumer sampling, network effects, and indirect appropriation). A closer look at market-structure implications of end-u...

  16. Easy digital engineering

    Energy Technology Data Exchange (ETDEWEB)

    Jin, Dal Bok

    2002-02-15

    This book lists basic of digital engineering, number system and digital code, Boolean algebra and basic logic circuit, simplify of logical expression, combinational circuit, arithmetic circuit, multivibrator circuit, sequential circuit, memory unit of semiconductor and logical element for program, D/A converter and A/D converter, logic element and integrated circuit and logic circuit and micro controller. It has exercises and answers about digital engineering and summary in the end of each chapter.

  17. Digital collections and exhibits

    CERN Document Server

    Denzer, Juan

    2015-01-01

    Today's libraries are taking advantage of cutting-edge technologies such as flat panel displays using touch, sound, and hands-free motions to design amazing exhibits using everything from simple computer hardware to advanced technologies such as the Microsoft Kinect. Libraries of all types are striving to add new interactive experiences for their patrons through exciting digital exhibits, both online and off. Digital Collections and Exhibits takes away the mystery of designing stunning digital exhibits to spotlight library trea

  18. Debunking the "Digital Native": Beyond Digital Apartheid, towards Digital Democracy

    Science.gov (United States)

    Brown, C.; Czerniewicz, L.

    2010-01-01

    This paper interrogates the currently pervasive discourse of the "net generation" finding the concept of the "digital native" especially problematic, both empirically and conceptually. We draw on a research project of South African higher education students' access to and use of Information and Communication Technologies (ICTs) to show that age is…

  19. Digitally-Driven Architecture

    Directory of Open Access Journals (Sweden)

    Henriette Bier

    2014-07-01

    Full Text Available The shift from mechanical to digital forces architects to reposition themselves: Architects generate digital information, which can be used not only in designing and fabricating building components but also in embedding behaviours into buildings. This implies that, similar to the way that industrial design and fabrication with its concepts of standardisation and serial production influenced modernist architecture, digital design and fabrication influences contemporary architecture. While standardisation focused on processes of rationalisation of form, mass-customisation as a new paradigm that replaces mass-production, addresses non-standard, complex, and flexible designs. Furthermore, knowledge about the designed object can be encoded in digital data pertaining not just to the geometry of a design but also to its physical or other behaviours within an environment. Digitally-driven architecture implies, therefore, not only digitally-designed and fabricated architecture, it also implies architecture – built form – that can be controlled, actuated, and animated by digital means.In this context, this sixth Footprint issue examines the influence of digital means as pragmatic and conceptual instruments for actuating architecture. The focus is not so much on computer-based systems for the development of architectural designs, but on architecture incorporating digital control, sens­ing, actuating, or other mechanisms that enable buildings to inter­act with their users and surroundings in real time in the real world through physical or sensory change and variation.

  20. Digital Differential Geometry Processing

    Institute of Scientific and Technical Information of China (English)

    Xin-Guo Liu; Hu-Jun Bao; Qun-Sheng Peng

    2006-01-01

    The theory and methods of digital geometry processing has been a hot research area in computer graphics, as geometric models serves as the core data for 3D graphics applications. The purpose of this paper is to introduce some recent advances in digital geometry processing, particularly mesh fairing, surface parameterization and mesh editing, that heavily use differential geometry quantities. Some related concepts from differential geometry, such as normal, curvature, gradient,Laplacian and their counterparts on digital geometry are also reviewed for understanding the strength and weakness of various digital geometry processing methods.

  1. Digitization Best Practices

    Energy Technology Data Exchange (ETDEWEB)

    Xue, Fei [Los Alamos National Laboratory; Holtkamp, Irma S. [Los Alamos National Laboratory; Knudson, Frances L. [Los Alamos National Laboratory

    2012-07-31

    This project involved performing tests and documenting results to determine best practices for digitizing older print documents. The digitization process is complicated, especially when original documents exhibit non-standard fonts and are faded. Tests focused on solutions to improve high quality scanning, increase OCR accuracy, and efficiently use embedded metadata. Results are summarized. From the test results on the right sides, we know that when we plan to digitize documents, we should balance Quantity and Quality based on our expectation, and then make final decision for the digitization process.

  2. Digital Audio Legal Recorder

    Data.gov (United States)

    Department of Transportation — The Digital Audio Legal Recorder (DALR) provides the legal recording capability between air traffic controllers, pilots and ground-based air traffic control TRACONs...

  3. The digital media handbook

    CERN Document Server

    Dewdney, Andrew

    2013-01-01

    The new edition of The Digital Media Handbook presents an essential guide to the historical and theoretical development of digital media, emphasising cultural continuity alongside technological change, and highlighting the emergence of new forms of communication in contemporary networked culture.Andrew Dewdney and Peter Ride present detailed critical commentary and descriptive historical accounts, as well as a series of interviews from a range of digital media practitioners, including producers, developers, curators and artists.The Digital Media Handbook highlights key concerns of today's prac

  4. Digital security technology simplified.

    Science.gov (United States)

    Scaglione, Bernard J

    2007-01-01

    Digital security technology is making great strides in replacing analog and other traditional security systems including CCTV card access, personal identification and alarm monitoring applications. Like any new technology, the author says, it is important to understand its benefits and limitations before purchasing and installing, to ensure its proper operation and effectiveness. This article is a primer for security directors on how digital technology works. It provides an understanding of the key components which make up the foundation for digital security systems, focusing on three key aspects of the digital security world: the security network, IP cameras and IP recorders.

  5. The Digital Turn

    NARCIS (Netherlands)

    Westera, Wim

    2013-01-01

    Westera, W. (2013, 22 May). The Digital Turn. How the internet transforms our existence. Invited presentation at the symposium "Onderwijsvernieuwen in crisistijd", Heerlen, The Netherlands: Open Universiteit.

  6. Digitization Best Practices

    Energy Technology Data Exchange (ETDEWEB)

    Xue, Fei [Los Alamos National Laboratory; Holtkamp, Irma S. [Los Alamos National Laboratory; Knudson, Frances L. [Los Alamos National Laboratory

    2012-07-31

    This project involved performing tests and documenting results to determine best practices for digitizing older print documents. The digitization process is complicated, especially when original documents exhibit non-standard fonts and are faded. Tests focused on solutions to improve high quality scanning, increase OCR accuracy, and efficiently use embedded metadata. Results are summarized. From the test results on the right sides, we know that when we plan to digitize documents, we should balance Quantity and Quality based on our expectation, and then make final decision for the digitization process.

  7. Cognitive Hacking and Digital Government: Digital Identity

    Directory of Open Access Journals (Sweden)

    Paul Thompson

    2004-04-01

    Full Text Available Recently the National Center for Digital Government held a workshop on "The Virtual Citizen: Identity, Autonomy, and Accountability: A Civic Scenario Exploration of the Role of Identity in On-Line. Discussions at the workshop focused on five scenarios for future authentication policies with respect to digital identity. The underlying technologies considered for authentication were: biometrics: cryptography, with a focus on digital signatures; secure processing/computation; and reputation systems. Most discussion at the workshop focused on issues related to authentication of users of digital government, but, as implied by the inclusion of a scenario related to ubiquitous identity theft, there was also discussion of problems related to misinformation, including cognitive hacking. Cognitive hacking refers to a computer or information system attack that relies on changing human users' perceptions and corresponding behaviors in order to succeed. This paper describes cognitive hacking, suggests countermeasures, and discusses the implications of cognitive hacking for identity in digital government. In particular, spoofing of government websites and insider misuse are considered.

  8. Cognitive Hacking and Digital Government: Digital Identity

    Directory of Open Access Journals (Sweden)

    Paul Thompson

    2004-04-01

    Full Text Available Recently the National Center for Digital Government held a workshop on "The Virtual Citizen: Identity, Autonomy, and Accountability: A Civic Scenario Exploration of the Role of Identity in On-Line. Discussions at the workshop focused on five scenarios for future authentication policies with respect to digital identity. The underlying technologies considered for authentication were: biometrics: cryptography, with a focus on digital signatures; secure processing/computation; and reputation systems. Most discussion at the workshop focused on issues related to authentication of users of digital government, but, as implied by the inclusion of a scenario related to ubiquitous identity theft, there was also discussion of problems related to misinformation, including cognitive hacking. Cognitive hacking refers to a computer or information system attack that relies on changing human users' perceptions and corresponding behaviors in order to succeed. This paper describes cognitive hacking, suggests countermeasures, and discusses the implications of cognitive hacking for identity in digital government. In particular, spoofing of government websites and insider misuse are considered.

  9. Virtual Identity and Digital Reading

    OpenAIRE

    Carlos Rodríguez Gordo

    2014-01-01

    This article firstly addresses a terminological clarification of the concepts of "digital identity", "digital reputation" and "digital fingerprint". On the second hand, it tries to think about the overall online activity of the digital subject, understood through the concept of “prosumer”, to lastly focus more specifically in the practical consequences of the progressive digitalization of reading.

  10. New techniques in digital holography

    CERN Document Server

    Picart, Pascal

    2015-01-01

    A state of the art presentation of important advances in the field of digital holography, detailing advances related to fundamentals of digital holography, in-line holography applied to fluid mechanics, digital color holography, digital holographic microscopy, infrared holography, special techniques in full field vibrometry and inverse problems in digital holography

  11. Measuring the Environment through Digital Images

    Science.gov (United States)

    Pickle, J.; Schloss, A. L.

    2009-12-01

    A network of sites for citizen scientists to take a consistent time sequence of digital photographs of the landscape and an Internet site (http://picturepost.unh.edu/) that efficiently stores and distributes the digital images creates a low-cost and sustainable resource for scientific environmental monitoring and formal and informal science education. Digital photographs taken from the same location and positioned in the same direction and orientation allow scientists to monitor a variety of environmental parameters, including plant health, growth, and phenology; erosion and deposition; water levels; and cloud and canopy cover. The PicturePost platform is simply an octagon placed in the center of a flat surface and secured to a post anchored in the ground or onto a building. The edges of the octagon allow positioning of the camera so the complete landscape may be photographed in less than a minute. A NASA-funded project, Digital Earth Watch (aka Measuring Vegetation Health, (http://mvh.sr.unh.edu) provides educational activities and background materials that help people learn about plants as environmental “green canaries” and about the basics of cameras and digital images. The website also provides free software to analyze digital images. Although this project has been in development for four years, it is only beginning to find partners in which the data support multiple efforts. A large part of this integration is a result of recent NASA funding, which has allowed a new website to be developed to archive and display the images. The developing collaborations and the development of the new website at the same time enhanced both efforts. Because the website could include tools/features that appealed to the collaborating groups, all participants contributed ideas facing fewer restrictions. PicturePost made from recycled plastic lumber.

  12. Digital Video Editing

    Science.gov (United States)

    McConnell, Terry

    2004-01-01

    Monica Adams, head librarian at Robinson Secondary in Fairfax country, Virginia, states that librarians should have the technical knowledge to support projects related to digital video editing. The process of digital video editing and the cables, storage issues and the computer system with software is described.

  13. Educating Digital Citizens

    Science.gov (United States)

    Tan, Thomas

    2011-01-01

    Digital citizenship is how educators, citizens, and parents can teach where the lines of cyber safety and ethics are in the interconnected online world their students will inhabit. Aside from keeping technology users safe, digital citizenship also prepares students to survive and thrive in an environment embedded with information, communication,…

  14. Improved digital thermometer design.

    Science.gov (United States)

    Swift, C S

    1981-01-01

    A simple digital thermometer design using a self-contained 3 1/2 digit LCD meter module is presented. The Celsius-reading (Centigrade) thermometer is powered by a single 9-V battery, has very low power drain, and uses an inexpensive NPN silicon transistor for the temperature sensor. A short bibliography on temperature measurement instrumentation is included.

  15. Handwritten Digits Recognition

    OpenAIRE

    Grand, Eric

    2000-01-01

    My work of diploma consisted in developing a Windows application for the recognition of the handwritten digits. The source images come from a pen-scanner. The user can also draw the digits directly with the mouse and do the recognition of it. In this software, I integrated the SVM Light reconizer.

  16. Digital Video in Research

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    2012-01-01

    as for TED Talks, podcasting and e-learning projects hosted by universities, museums and other institutions. These new audiovisual digital storytelling practices are considered “video” texts in this paper. The increasing adaptation of video for academic purposes reflects overarching changes in digital media...

  17. Changing State Digital Libraries

    Science.gov (United States)

    Pappas, Marjorie L.

    2006-01-01

    Research has shown that state virtual or digital libraries are evolving into websites that are loaded with free resources, subscription databases, and instructional tools. In this article, the author explores these evolving libraries based on the following questions: (1) How user-friendly are the state digital libraries?; (2) How do state digital…

  18. Digital formidling af kulturarv

    DEFF Research Database (Denmark)

    En af tidens store kulturelle dagsordner drejer sig om digital tilgængeliggørelse af kulturarv. Fortidens spor dukker op i nye former på nettet - næsten alle kulturinstitutioner arbejder med, og befolkningen har fået helt nye muligheder for at se med og deltage. Digital formidling af kulturarv...

  19. Digital signage sobre IP

    OpenAIRE

    Casademont Filella, Albert

    2012-01-01

    Projecte que versa sobre el disseny i la implementació d'un sistema de Digital Signage (Cartelleria Digital) sobre IP, creant un gestor que permeti controlar de forma remota tot un conjunt de petits dispositius connectats a pantalles que emeten continguts multimèdia com vídeos, imatges, feeds rss...

  20. Scholars | Digital Representation | Publishing

    Science.gov (United States)

    Hodgson, Justin

    2014-01-01

    Understanding the current state of digital publishing means that writers can now do more and say more in more ways than ever before in human history. As modes, methods, media and mechanisms of expression mutate into newer and newer digital forms, writers find themselves at a moment when they can create, critique collaborate, and comment according…

  1. Mapping digital media: Netherlands

    NARCIS (Netherlands)

    de Waal, M.; Leurdijk, A.; Nordeman, L.; Poell, T.

    2012-01-01

    The Mapping Digital Media project examines the global opportunities and risks created by the transition from traditional to digital media. Covering 60 countries, the project examines how these changes affect the core democratic service that any media system should provide: news about political,

  2. Digital Knowledge Resources

    Science.gov (United States)

    Pandian, M. Paul

    2008-01-01

    Technology has revolutionized the concept of libraries. Networking and computing technologies have now become sufficiently advanced to support the design and deployment of large digital libraries which are capable of supporting the conventional end-user functions. Digital libraries are a natural extension of the evolution in which libraries have…

  3. Changing State Digital Libraries

    Science.gov (United States)

    Pappas, Marjorie L.

    2006-01-01

    Research has shown that state virtual or digital libraries are evolving into websites that are loaded with free resources, subscription databases, and instructional tools. In this article, the author explores these evolving libraries based on the following questions: (1) How user-friendly are the state digital libraries?; (2) How do state digital…

  4. Digitizing migration heritage

    DEFF Research Database (Denmark)

    Marselis, Randi

    2011-01-01

    Museums are increasingly digitizing their collections and making them available to the public on-line. Creating such digital resources may become means for social inclusion. For museums that acknowledge migration history and cultures of ethnic minority groups as important subjects in multiethnic...

  5. Interactive digital art

    NARCIS (Netherlands)

    Spinhoven van Oosten, Bill; van der Zwaag, B.J.; Meratnia, Nirvana; Hallnäs, L.; Hellström, A.; Landin, H.

    2011-01-01

    In this paper, we present DNArt in general, our work in DNArt’s lab including a detailed presentation of the first artwork that has come out of our lab in September 2011, entitled “ENCOUNTERS #3‿, and the use of DNArt for digital art conservation. Research into the use of DNArt for digital art

  6. The Digital Absurd

    Science.gov (United States)

    Hodges, Steve

    2010-01-01

    I believe that the concept of the absurd, as described in philosophy and reflected in works of drama and literature, provides an unusual and helpful perspective from which to view the emerging field of digital media. In my opinion, absurd principles can help us understand the mixed feelings we may have when engaging with digital media: joy and…

  7. Star photographer goes digital

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正> Steve McCurry is an appointed photographer of National Geo graphic magazine. Invited bySony, he attended the Sony Cyber-shot F828 digital camera product launch. He exchanged ideas with Chinese journalists and photographers regarding digital camera technology, as well as photographic techniques and experiences.

  8. Digital Signature Management.

    Science.gov (United States)

    Hassler, Vesna; Biely, Helmut

    1999-01-01

    Describes the Digital Signature Project that was developed in Austria to establish an infrastructure for applying smart card-based digital signatures in banking and electronic-commerce applications. Discusses the need to conform to international standards, an international certification infrastructure, and security features for a public directory…

  9. The politics of digits

    DEFF Research Database (Denmark)

    Olsen, Asmus Leth

    2013-01-01

    From the concept of odd pricing, i.e., setting rightmost price digits below a whole number, this paper advances the political counterpart of odd taxation using a panel of Danish municipal taxes. First, the distribution of tax decimals is non-uniform and resembles the distribution of price...... to how policy digits are arranged to exploit voters’ cognitive biases....

  10. Digital Knowledge Resources

    Science.gov (United States)

    Pandian, M. Paul

    2008-01-01

    Technology has revolutionized the concept of libraries. Networking and computing technologies have now become sufficiently advanced to support the design and deployment of large digital libraries which are capable of supporting the conventional end-user functions. Digital libraries are a natural extension of the evolution in which libraries have…

  11. Monetizing Digital Assets

    Directory of Open Access Journals (Sweden)

    Felician ALECU

    2013-04-01

    Full Text Available This article covers the options the digital content creators have to monetize their creations. The simplest solution seems to be the winning one, so by enabling the ads, the digital content may be quickly transformed into money with no cost.

  12. Digital automatic gain control

    Science.gov (United States)

    Uzdy, Z.

    1980-01-01

    Performance analysis, used to evaluated fitness of several circuits to digital automatic gain control (AGC), indicates that digital integrator employing coherent amplitude detector (CAD) is best device suited for application. Circuit reduces gain error to half that of conventional analog AGC while making it possible to automatically modify response of receiver to match incoming signal conditions.

  13. Digital Pinhole Camera

    Science.gov (United States)

    Lancor, Rachael; Lancor, Brian

    2014-01-01

    In this article we describe how the classic pinhole camera demonstration can be adapted for use with digital cameras. Students can easily explore the effects of the size of the pinhole and its distance from the sensor on exposure time, magnification, and image quality. Instructions for constructing a digital pinhole camera and our method for…

  14. Digital Media and Learning

    Science.gov (United States)

    John D. and Catherine T. MacArthur Foundation, 2012

    2012-01-01

    MacArthur launched the digital media and learning initiative in 2006 to explore how digital media are changing the way young people learn, socialize, communicate, and play. Since 2006, the Foundation has awarded grants totaling more than $100 million for research, development of innovative new technologies, new learning environments for youth,…

  15. Mapping digital media: Netherlands

    NARCIS (Netherlands)

    de Waal, M.; Leurdijk, A.; Nordeman, L.; Poell, T.

    2012-01-01

    The Mapping Digital Media project examines the global opportunities and risks created by the transition from traditional to digital media. Covering 60 countries, the project examines how these changes affect the core democratic service that any media system should provide: news about political, econ

  16. Practical digital mammography

    Energy Technology Data Exchange (ETDEWEB)

    Hashimoto, Beverly E. [Washington Univ., Seattle, WA (United States)]|[Virginia Mason Medical Center, VA (United States)

    2008-07-01

    This book is meant for the radiologist who is facing the challenge of organizing a digital mammographic imaging center. This text is meant to be a practical book that provides information about digital mammographic physics and equipment which will allow one to intelligently compare technologies and systems. Some of the major challenges include: large expense; rapidly changing technology, and inconsistent connectivity; and finally, need for strong information technology support. The initial conversion cost to digital mammographic imaging is relatively expensive due to the cost of digital mammography hardware, software, and storage. Virtually all other imaging modalities are being converted to purely digital storage and transfer, and the digital trend in mammography is inevitable. Technical advantages of digital mammography are described. However, the improved flexibility in image display and transfer are some of its strongest features. In conclusion, although there are increasing imaging modalities that may be used to evaluate breast disease, mammography will continue to play a key role in detecting breast cancer. To be an effective imager, the radiologist should become familiar with digital mammography and understand its role within the increasing complex structure of breast imaging techniques.

  17. Digital Line Graph - Large Scale

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Digital line graph (DLG) data are digital representations of cartographic information. DLGs of map features are converted to digital form from maps and related...

  18. Digital Line Graph - Large Scale

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Digital line graph (DLG) data are digital representations of cartographic information. DLGs of map features are converted to digital form from maps and related...

  19. Digital forensic standards: international progress

    CSIR Research Space (South Africa)

    Grobler, MM

    2010-05-01

    Full Text Available With the explosion of digital crime, digital forensics is more often applied. The digital forensic discipline developed rather rapidly, but up to date very little international standardization with regard to processes, procedures or management has...

  20. Parallel digital forensics infrastructure.

    Energy Technology Data Exchange (ETDEWEB)

    Liebrock, Lorie M. (New Mexico Tech, Socorro, NM); Duggan, David Patrick

    2009-10-01

    This report documents the architecture and implementation of a Parallel Digital Forensics infrastructure. This infrastructure is necessary for supporting the design, implementation, and testing of new classes of parallel digital forensics tools. Digital Forensics has become extremely difficult with data sets of one terabyte and larger. The only way to overcome the processing time of these large sets is to identify and develop new parallel algorithms for performing the analysis. To support algorithm research, a flexible base infrastructure is required. A candidate architecture for this base infrastructure was designed, instantiated, and tested by this project, in collaboration with New Mexico Tech. Previous infrastructures were not designed and built specifically for the development and testing of parallel algorithms. With the size of forensics data sets only expected to increase significantly, this type of infrastructure support is necessary for continued research in parallel digital forensics. This report documents the implementation of the parallel digital forensics (PDF) infrastructure architecture and implementation.

  1. Digital Technology Entrepreneurship

    DEFF Research Database (Denmark)

    Giones, Ferran; Brem, Alexander

    2017-01-01

    Technology entrepreneurship is an established concept in academia. However, recent developments in the context of digital entrepreneurship call for revision and advance- ment. The multiple possible combinations of technology and entrepreneurship have res- ulted in a diversity of phenomena...... with significantly different characteristics and socio-economic impact. This article is focused on the identification and description of technology entrepreneurship in times of digitization. Based on current examples, we identify and describe characterizations of technology entrepreneurship, digital techno- logy...... entrepreneurship, and digital entrepreneurship. With this new delineation of terms, we would like to foster discussion between researchers, entrepreneurs, and policy makers on the impact of digitization on entrepreneurship, and set a future research agenda....

  2. Transformation of Digital Ecosystems

    DEFF Research Database (Denmark)

    Henningsson, Stefan; Hedman, Jonas

    2014-01-01

    In digital ecosystems, the fusion relation between business and technology means that the decision of technical compatibility of the offering is also the decision of how to position the firm relative to the coopetive relations that characterize business ecosystems. In this article we develop...... the Digital Ecosystem Technology Transformation (DETT) framework for explaining technology-based transformation of digital ecosystems by integrating theories of business and technology ecosystems. The framework depicts ecosystem transformation as distributed and emergent from micro-, meso-, and macro- level...... coopetition. The DETT framework consists an alternative to the existing explanations of digital ecosystem transformation as the rational management of one central actor balancing ecosystem tensions. We illustrate the use of the framework by a case study of transformation in the digital payment ecosystem...

  3. Creative Digital Media Practices

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    The presentation reviews the interplay of dialogic (Bakhtin, 1981) and multimodal theories on media production practices, with attention to visual communication (Kress and van Leeuwen, 2001, 2006). This theoretical approach aids in reflecting on digital media practices as novel (new) sign systems...... on collaboration (Benkler, 2006). The shift toward visual modes and digital media practices pose many pedagogical challenges for academics. I want to raise questions on how to teach “dialogically” with and through creative, digital media practices based on my plans for a course in Fall, 2011, where students...... develop a collaborative digital storytelling showcase for their own digital stories about Roskilde University. This course is intended to bring up reflections on the wider phenomenon of contemporary media practices, such as: YouTube, DIY (do-it-yourself) filmmaking or homemade, garage cinema (Jenkins...

  4. Predictive dynamic digital holography

    Science.gov (United States)

    Sulaiman, Sennan; Gibson, Steve; Spencer, Mark

    2016-09-01

    Digital holography has received recent attention for many imaging and sensing applications, including imaging through turbulent and turbid media, adaptive optics, three dimensional projective display technology and optical tweezing. A significant obstacle for digital holography in real-time applications, such as wavefront sensing for high energy laser systems and high speed imaging for target tracking, is the fact that digital holography is computationally intensive; it requires iterative virtual wavefront propagation and hill-climbing to optimize some sharpness criteria. This paper demonstrates real-time methods for digital holography based on approaches developed recently at UCLA for optimal and adaptive identification, prediction, and control of optical wavefronts. The methods presented integrate minimum variance wavefront prediction into digital holography schemes to short-circuit the computationally intensive algorithms for iterative propagation of virtual wavefronts and hill climbing for sharpness optimization.

  5. Principles of synchronous digital hierarchy

    CERN Document Server

    Jain, Rajesh Kumar

    2012-01-01

    The book presents the current standards of digital multiplexing, called synchronous digital hierarchy, including analog multiplexing technologies. It is aimed at telecommunication professionals who want to develop an understanding of digital multiplexing and synchronous digital hierarchy in particular and the functioning of practical telecommunication systems in general. The text includes all relevant fundamentals and provides a handy reference for problem solving or defining operations and maintenance strategies. The author covers digital conversion and TDM principles, line coding and digital

  6. Computing Logarithms Digit-by-Digit

    Science.gov (United States)

    Goldberg, Mayer

    2005-01-01

    In this work, we present an algorithm for computing logarithms of positive real numbers, that bears structural resemblance to the elementary school algorithm of long division. Using this algorithm, we can compute successive digits of a logarithm using a 4-operation pocket calculator. The algorithm makes no use of Taylor series or calculus, but…

  7. The Digital Carrot, the Digital Stick

    Science.gov (United States)

    Jackson, Gregory A.

    2007-01-01

    In this article, the author asserts that technology is not the answer to digital piracy at colleges and universities. Citing the three most common explanations given for copyright infringement--that students cannot always get what they want, cannot always use what they can get, or think the price of what they can get is unfair--he asserts that the…

  8. Research on Digital Product Modeling Key Technologies of Digital Manufacturing

    Institute of Scientific and Technical Information of China (English)

    DING Guoping; ZHOU Zude; HU Yefa; ZHAO Liang

    2006-01-01

    With the globalization and diversification of the market and the rapid development of Information Technology (IT) and Artificial Intelligence (AI), the digital revolution of manufacturing is coming. One of the key technologies in digital manufacturing is product digital modeling. This paper firstly analyzes the information and features of the product digital model during each stage in the product whole lifecycle, then researches on the three critical technologies of digital modeling in digital manufacturing-product modeling, standard for the exchange of product model data and digital product data management. And the potential signification of the product digital model during the process of digital manufacturing is concluded-product digital model integrates primary features of each stage during the product whole lifecycle based on graphic features, applies STEP as data exchange mechanism, and establishes PDM system to manage the large amount, complicated and dynamic product data to implement the product digital model data exchange, sharing and integration.

  9. Management Practice and Innovation in Digital I&C System Maintenance of Nuclear Power Plant%核电厂数字化仪控系统维修领域管理实践与创新

    Institute of Scientific and Technical Information of China (English)

    黄潜; 师庆维; 黄亚宁

    2012-01-01

    介绍了田湾核电站在数字化仪控系统维护过程中对风险分析、设备状态监督、缺陷跟踪、维修管理网络等方面的新思路和新方法的运用情况,描述了企业文化和科技创新对数字化仪控维修工作的促进作用。田湾核电站数字化仪控系统维修领域管理实践与创新手段是科学有效的,可为其他工程项目的数字化仪控维修管理提供借鉴。%This essay introduces the application situation of new ideas and methods in aspects of risk analysis, equipment status monitoring, defect tracing and maintenance management network in the course of maintaining the digital I&C system of Tianwan Nuclear Power Station, gives a detail description aEout the enhancement of the enterprise culture and scienfific innovation in the field of digital I&C system maintenance. The practices in the past several years show that the management practice and the innovation means in the field of digital I&C system maintenance of Tianwan Nuclear Power Station are effective, and can provide reference for the other projects in this regard.

  10. Digital Architecture – Results From a Gap Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Oxstrand, Johanna Helene [Idaho National Lab. (INL), Idaho Falls, ID (United States); Thomas, Kenneth David [Idaho National Lab. (INL), Idaho Falls, ID (United States); Fitzgerald, Kirk [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2015-09-01

    The digital architecture is defined as a collection of IT capabilities needed to support and integrate a wide-spectrum of real-time digital capabilities for nuclear power plant performance improvements. The digital architecture can be thought of as an integration of the separate I&C and information systems already in place in NPPs, brought together for the purpose of creating new levels of automation in NPP work activities. In some cases, it might be an extension of the current communication systems, to provide digital communications where they are currently analog only. This collection of IT capabilities must in turn be based on a set of user requirements that must be supported for the interconnected technologies to operate in an integrated manner. These requirements, simply put, are a statement of what sorts of digital work functions will be exercised in a fully-implemented seamless digital environment and how much they will be used. The goal of the digital architecture research is to develop a methodology for mapping nuclear power plant operational and support activities into the digital architecture, which includes the development of a consensus model for advanced information and control architecture. The consensus model should be developed at a level of detail that is useful to the industry. In other words, not so detailed that it specifies specific protocols and not so vague that it is only provides a high level description of technology. The next step towards the model development is to determine the current state of digital architecture at typical NPPs. To investigate the current state, the researchers conducted a gap analysis to determine to what extent the NPPs can support the future digital technology environment with their existing I&C and IT structure, and where gaps exist with respect to the full deployment of technology over time. The methodology, result, and conclusions from the gap analysis are described in this report.

  11. Digital Enlightenment Yearbook 2012

    CERN Document Server

    Bus, J; Hildebrandt, M

    2012-01-01

    There have been many inevitable transformations in society due to digitization - the introduction of digital technology, including communication technology, through the Internet and its use via the Web.This book is the first Yearbook of the Digital Enlightenment Forum. Whilst it cannot cover all the many aspects which the forum encompasses, the book gives an impression of the broad spectrum of the forum and a clear picture of the multi-disciplinary nature of the issues at stake.The first paper in the book is a contribution from the father of the Web, Sir Tim Berners-Lee, and Harry Halpin. They

  12. Encryption for digital content

    CERN Document Server

    Kiayias, Aggelos

    2010-01-01

    Encryption for Digital Content is an area in cryptography that is widely used in commercial productions (e.g., Blu-Ray and HD-DVDs). This book provides a comprehensive mathematical treatment of combinatorial encryption techniques used in digital content distribution systems and related attack models. A complete description of broadcast encryption with various revocation and tracing functionalities is included. ""Encryption for Digital Content"" introduces the subset cover framework (currently used in AACS, Blu-Ray and HD-DVDs,) and tracking/revocation mechanisms in various attack models. Pirat

  13. In a digital mood

    DEFF Research Database (Denmark)

    Brus, Anne

    2017-01-01

    “In the Mood” is a famous Glenn Miller instrumental song from the late 1930s. The song is jazzy and swingy, and you get in a dancing mood when you listen to it. It is generally accepted knowledge that music is a mood maker but how about digital media? That is the question that Richard Coyne......, a professor at the University of Edinburgh, seeks to answer in his latest book “Mood and Mobility. Navigating the Emotional Spaces of Digital Social Networks”. Coyne has written several books on architecture but in this recent work Coyne focuses on the architecture of the Internet and how digital media affect...

  14. Advanced Digital Preservation

    CERN Document Server

    Giaretta, David

    2011-01-01

    There is growing recognition of the need to address the fragility of digital information, on which our society heavily depends for smooth operation in all aspects of daily life. This has been discussed in many books and articles on digital preservation, so why is there a need for yet one more? Because, for the most part, those other publications focus on documents, images and webpages -- objects that are normally rendered to be simply displayed by software to a human viewer. Yet there are clearly many more types of digital objects that may need to be preserved, such as databases, scientific da

  15. Digital Marketing Communication

    OpenAIRE

    Corniani, Margherita

    2006-01-01

    Digital marketing communication is directed to profiled targets, which are active in the communication process. Every communication flow can ask for an information answer from the market. This opportunity grants immediate feed-backs and feed-forwards, so that digital communication can be easily and cheaply measured; digital communication flows are diffused at costs that are getting lower and lower, but it asks specialized and deep competences to communication managers. The ease in the flowing...

  16. SHDAS Production Digitizer Evaluation.

    Energy Technology Data Exchange (ETDEWEB)

    Merchant, Bion J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-07-01

    The Seismo-Hydroacoustic Data Acquisition System (SHDAS) is undergoing evaluation in preparation for its engineering, development, and deployment by the U.S Navy as an ocean bottom seismic monitoring system. At the current stage of development, the production digitizers are being evaluated to confirm their performance prior to packaging and assembly for deployment. The testing of the digitizers is being conducted at Delta Group Electronics, the digitizer fabricator, in San Diego, California, performed by Sandia National Laboratories with the assistance of Leidos and Delta Group Electronics.

  17. Digital Library and Digital Reference Service: Integration and Mutual Complementarity

    Science.gov (United States)

    Liu, Jia

    2008-01-01

    Both the digital library and the digital reference service were invented and have been developed under the networked environment. Among their intersections, the fundamental thing is their symbiotic interest--serving the user in a more efficient way. The article starts by discussing the digital library and its service and the digital reference…

  18. Digitization and digital archiving a practical guide for librarians

    CERN Document Server

    Leggett, Elizabeth R

    2014-01-01

    Modern library patrons are embracing the ease with which information can be accessed digitally, and so many librarians are currently working toward making information available electronically. Digitization and Digital Archiving: A Practical Guide for Librarians is a comprehensive guide with step-by-step instructions for forming digital archives.

  19. Digital culture industry a history of digital distribution

    CERN Document Server

    Allen-Robertson, James

    2013-01-01

    How did digital media happen? Through a unique approach to digital documents, and detailed intricate histories of illicit internet piracy networks, The Digital Culture Industry goes beyond the Napster creation myth and illuminates the unseen individuals, code and events behind the turn to digital media.

  20. Digital Literacy Learning in Higher Education through Digital Storytelling Approach

    Science.gov (United States)

    Chan, Banny S. K.; Churchill, Daniel; Chiu, Thomas K. F.

    2017-01-01

    It is necessary to develop digital literacy skills with which students can communicate and express their ideas effectively using digital media. The educational sectors around the world are beginning to incorporate digital literacy into the curriculum. Digital storytelling, one of the possible classroom activities, is an approach which may help…

  1. Digital functions and data reconstruction digital-discrete methods

    CERN Document Server

    Chen, Li M

    2012-01-01

    Digital Functions and Data Reconstruction: Digital-Discrete Methods provides a solid foundation to the theory of digital functions and its applications to image data analysis, digital object deformation, and data reconstruction. This new method has a unique feature in that it is mainly built on discrete mathematics with connections to classical methods in mathematics and computer sciences. Digitally continuous functions and gradually varied functions were developed in the late 1980s. A. Rosenfeld (1986) proposed digitally continuous functions for digital image analysis, especially to describe

  2. Digital literacies at school. Students' digital profiles

    Directory of Open Access Journals (Sweden)

    Valentina Pennazio

    2013-04-01

    Full Text Available L’articolo presenta una ricerca volta a focalizzare le modalità in cui la Digital Literacy si traduce a scuola. Lo studio ha inteso sottolineare le molteplici dimensioni della Digital Literacy: Information Technology Literacy; Information Literacy; Visual Literacy e Media Literacy ed è stato effettuato nelle scuole primarie e secondarie di primo grado in Liguria. Sono state organizzate settimane di attività di ricerca, analisi e rielaborazione di informazioni, in classe e in rete, individualmente e in gruppo. Dalle autovalutazione degli studenti, svolte al termine di ogni attività, sono emersi i profili digitali che gli studenti tendono ad assumere quando utilizzano le tecnologie digitali. Tali profili possono essere utilizzati dagli insegnanti per progettare in maniera più mirata e significativa le attività con le tecnologie a scuola.

  3. NLM Digital Collections

    Data.gov (United States)

    U.S. Department of Health & Human Services — The National Library of Medicine's (NLM) Digital Collections offers a search-based Web service that provides access to the Dublin Core metadata and full-text OCR of...

  4. Creative Digital Media Practices

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    on collaboration (Benkler, 2006). The shift toward visual modes and digital media practices pose many pedagogical challenges for academics. I want to raise questions on how to teach “dialogically” with and through creative, digital media practices based on my plans for a course in Fall, 2011, where students......The presentation reviews the interplay of dialogic (Bakhtin, 1981) and multimodal theories on media production practices, with attention to visual communication (Kress and van Leeuwen, 2001, 2006). This theoretical approach aids in reflecting on digital media practices as novel (new) sign systems...... and personal levels. The discussion includes pedagogical issues in regards to the upcoming university course, such as: how to encourage dialogic reflection between students as authors and viewers of digital stories, and how to support their application and integration of visual and dialogic communication...

  5. Digital Audio Collections

    Directory of Open Access Journals (Sweden)

    Jason Tenter

    2010-11-01

    Full Text Available

    This paper is about the possibility of libraries creating digital music or audio collections based on the current state of the digital music industry, and in comparison with the difficulties librarians have found in adding e-books to collections. In comparing the e-book and digital music markets, factors such as digital rights management (DRM and the differences in both markets’ relationships with customers are examined. This juxtaposition suggests that where e-books have been difficult to include in library collections because publishers want to maintain control over their content, music publishers have had to resign some of the control over their products because of file-sharing, and so may work with libraries to develop these collections in a more constructive way than e-book venders. At the end of the paper, some models are suggested for developing these collections.

  6. Academia Leads Digital Revolution

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ As the Chinese book publishing industry sits nervously on the edqe of possible market economy led reforms, one key area to address will be its ability to come to terms with the onset of digital publishing.

  7. Comprehension of digital media

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Ju Hwan

    2008-11-15

    This book is divided four parts. The first part describes media and mark on sign and media, what is the sign?, interpretation of sign and semiotics. The second part is for production sign theory and origin of digital revolution such as the problem of origin of digital revolution, homogeneity of producing goods and sign : triple triangle model for production sign theory, triple triangle model for producing goods, triple triangle model of producing sign and triple triangle model of art works. The third parts deals with development of the media and meaning of digital revolution with four changes : invention of letter, appearance of printed media and establishment modernity, appearance electronic media and mess media and appearance of digital media. The last part mentions ontology of world wide web.

  8. Bridging the Digital Divide

    DEFF Research Database (Denmark)

    Frølunde, Lisbeth

    2002-01-01

    The article concerns the digital divide, meaning the social inequity in the access and the opportunities for gaining competencies with ICT (information and communication technologies). Problematic issues are highlighted in relation to experiences during visits to several Computer Clubhouses...

  9. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2011-01-01

    system.   Sessions in class with active participation by the students. The time will be divided between lectures and the students solving problems, including simulating digital communication building blocks in Matlab. Combines lectures and hands-on work. Semester: E2011 Extent: 7.5 ects......The course presents the fundamental principles for digital communication, e.g. fixed-wire modems or wireless communication channels, as applied in mobile phones, wireless computer networks or wireless systems in intelligent houses. Based on the functional blocks of a digital communication system......, the fundamental principles for modulation and detection in Gaussian noise is treated. This includes the principles for the determination of the bit-error rate for a digital communication system. During the course, a selection of small Matlab exercises are prepared, for simulation of parts of a communication...

  10. Developing digital forensic governance

    CSIR Research Space (South Africa)

    Grobler, M

    2010-03-01

    Full Text Available This paper presents a Digital Forensic (DF) governance framework and its mapping on the SANS ISO/IEC 38500:2009 Corporate governance of information technology structure. DF governance assists organisations in guiding the management team...

  11. Performing Digital Literature

    Directory of Open Access Journals (Sweden)

    Jerome Fletcher

    2015-11-01

    Full Text Available Digital literature is a complex assemblage of related elements –material, spatial, linguistic, performative, textual, cultural, social– each of which is at one time interdependent and detached. This article discusses the literary creation within the cyberculture from the performativity point of view in relation to the textual apparatus. This is done through the analysis of a selection of performances where physical corporeality has a collaborative function with the body to a greater or lesser degree. Therefore, this physical feature can not only change, but stand at three possible and hybridizable axes: 1 the digital text as protagonist, 2 the digital text as counterpart, and 3 the digital text as site.

  12. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2011-01-01

    The course presents the fundamental principles for digital communication, e.g. fixed-wire modems or wireless communication channels, as applied in mobile phones, wireless computer networks or wireless systems in intelligent houses. Based on the functional blocks of a digital communication system......, the fundamental principles for modulation and detection in Gaussian noise is treated. This includes the principles for the determination of the bit-error rate for a digital communication system. During the course, a selection of small Matlab exercises are prepared, for simulation of parts of a communication...... system. Having passed the course, the student will be able to accomplish the following, within the areas shown below: Model for Communication System. Prepare and explain the functional block in a digital communication system, corresponding to the specific course contents. Model for Communication Channel...

  13. DIGITAL TRAINING TEACHER COMPETENCIES

    National Research Council Canada - National Science Library

    Jesús Arturo Regalado Sandoval

    2013-01-01

    ...” and also a need to talk about teaching skills, digital skills, project work, learning to learn in schools of all levels, as it is in this case the high school, as our young students belong to a new...

  14. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2011-01-01

    The course presents the fundamental principles for digital communication, e.g. fixed-wire modems or wireless communication channels, as applied in mobile phones, wireless computer networks or wireless systems in intelligent houses. Based on the functional blocks of a digital communication system...... system. Having passed the course, the student will be able to accomplish the following, within the areas shown below: Model for Communication System. Prepare and explain the functional block in a digital communication system, corresponding to the specific course contents. Model for Communication Channel....... Prepare and explain a model for a communication channel, corresponding to the specific course contents. Modulation Methods. Explain the properties of digital modulation methods, corresponding to the specific course contents. Intersymbol Interference. Explain intersymbol inteference, corresponding...

  15. Digital imaging primer

    CERN Document Server

    Parkin, Alan

    2016-01-01

    Digital Imaging targets everyyone with an interest in digital imaging, be they professional or private, who uses even quite modest equipment such as a PC, digital camera and scanner, a graphics editor such as Paint, and an inkjet printer. Uniquely, it is intended to fill the gap between highly technical texts for academics (with access to expensive equipment) and superficial introductions for amateurs. The four-part treatment spans theory, technology, programs and practice. Theory covers integer arithmetic, additive and subtractive color, greyscales, computational geometry, and a new presentation of discrete Fourier analysis; Technology considers bitmap file structures, scanners, digital cameras, graphic editors, and inkjet printers; Programs develops several processing tools for use in conjunction with a standard Paint graphics editor and supplementary processing tools; Practice discusses 1-bit, greyscale, 4-bit, 8-bit, and 24-bit images for the practice section. Relevant QBASIC code is supplied an accompa...

  16. Digital Raster Graphics

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) topographic map. The scanned image includes all map collar information. The...

  17. TV Digital Station Transmitters

    Data.gov (United States)

    Department of Homeland Security — This file is an extract from the Consolidated Database System (CDBS) licensed by the Media Bureau. It consists of Digital Television broadcasters (see Rule Part47...

  18. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2011-01-01

    The course presents the fundamental principles for digital communication, e.g. fixed-wire modems or wireless communication channels, as applied in mobile phones, wireless computer networks or wireless systems in intelligent houses. Based on the functional blocks of a digital communication system......, the fundamental principles for modulation and detection in Gaussian noise is treated. This includes the principles for the determination of the bit-error rate for a digital communication system. During the course, a selection of small Matlab exercises are prepared, for simulation of parts of a communication...... system. Having passed the course, the student will be able to accomplish the following, within the areas shown below: Model for Communication System. Prepare and explain the functional block in a digital communication system, corresponding to the specific course contents. Model for Communication Channel...

  19. DIGITAL ERA: UTILIZE OF CLOUD COMPUTING TECHNOLOGY IN DIGITAL LIBRARY

    Directory of Open Access Journals (Sweden)

    T. RAGHUNADHA REDDY

    2012-09-01

    Full Text Available With the purpose of applying cloud computing to digital library, the paper initially describes cloud computing and analyzes current status of cloud computing in digital library. Then it proposes the architecture of cloud computing in digital library and summarises the application of cloud computing in digital library. Finally the author brings out the future improvement in digital library using cloud computing technology.

  20. Proactive Ergonomics Based on Digitalization Using 3D Scanning and Workplace Modeling in Texnomatix Jack with Augmented Reality

    OpenAIRE

    Hovanec, Micha; Pačaiová, Hana; Hrozek, František; Varga, Martin

    2014-01-01

    This paper suggests a vision of present possibilities of modern ergonomics, and an application model of the proposed system in the digital environment of digital plant. Future trends and visions use a proactive approach of modern ergonomics integrated with sustainable success management. The implementation of new approaches digital plant of ergonomics and occupational safety and health management assumes synergic effect brought by the harmony between proactive ergonomics and risk management i...

  1. Digital and analog communication systems

    Science.gov (United States)

    Shanmugam, K. S.

    1979-01-01

    The book presents an introductory treatment of digital and analog communication systems with emphasis on digital systems. Attention is given to the following topics: systems and signal analysis, random signal theory, information and channel capacity, baseband data transmission, analog signal transmission, noise in analog communication systems, digital carrier modulation schemes, error control coding, and the digital transmission of analog signals.

  2. The Coevolution of Digital Ecosystems

    Science.gov (United States)

    SungYong, Um

    2016-01-01

    Digital ecosystems are one of the most important strategic issues in the current digital economy. Digital ecosystems are dynamic and generative. They evolve as new firms join and as heterogeneous systems are integrated into other systems. These features digital ecosystems determine economic and technological success in the competition among…

  3. Digital imaging a practical approach

    CERN Document Server

    Koelling, Jill Marie

    2004-01-01

    Digital Imaging is the essential guide to understanding digitization and managing a digitizing project. Koelling covers everything from deciding if digitizing is for you to planning and management, choosing equipment, and managing databases. Not only does she guide you in mastering the technical details, she also helps you find the fun in working with images.

  4. Escaping the Digital Dark Age.

    Science.gov (United States)

    Brand, Stewart

    1999-01-01

    Discusses the loss of stored knowledge due to the continuous obsolescence of digital formats and platforms. Topics include digital storage versus digital preservation; the use of metadata and efforts to create standards for it; information on the Internet; and the need for long-term planning to solve digital degradation. (LRW)

  5. Digital Interactive TV Network Architecture

    Institute of Scientific and Technical Information of China (English)

    Vincent; Dureau

    2001-01-01

    Introduction The infrastructure of digital TV is evolving very rapidly.TheTV infrastructure is quickly migrating from analog to digital TV.Even though digital transmission really launched only 10 yearsago.there are already more than 50 M digital receivers worldwide.

  6. The Web and Digital Humanities

    DEFF Research Database (Denmark)

    Brügger, Niels; Finnemann, Niels Ole

    2013-01-01

    and archived Web materials. It is argued that both of these characteristics differ from the concepts of digital materials developed within the frameworks of digital humanities and that the growing variety of different kinds of digital materials and processes calls for a reinterpretation of the computer......, stressing the variability of the functional architecture of digital media....

  7. The Coevolution of Digital Ecosystems

    Science.gov (United States)

    SungYong, Um

    2016-01-01

    Digital ecosystems are one of the most important strategic issues in the current digital economy. Digital ecosystems are dynamic and generative. They evolve as new firms join and as heterogeneous systems are integrated into other systems. These features digital ecosystems determine economic and technological success in the competition among…

  8. Fabelagtig digital isvinter

    DEFF Research Database (Denmark)

    Mygind, Sarah

    2015-01-01

    Hybrid: Merete Pryds Helles litterære app sætter helt nye standarder for digital litteratur til børn. Hos ”Wuwu & Co.” kan man hverken tie eller sidde stille.......Hybrid: Merete Pryds Helles litterære app sætter helt nye standarder for digital litteratur til børn. Hos ”Wuwu & Co.” kan man hverken tie eller sidde stille....

  9. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2010-01-01

    Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Autumn 2010 Extent: 7.5 ects Class size: 18......Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Autumn 2010 Extent: 7.5 ects Class size: 18...

  10. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2010-01-01

    Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Spring 2010 Extent: 7.5 ects Class size: 9......Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Spring 2010 Extent: 7.5 ects Class size: 9...

  11. Digital Heritage Experiences

    DEFF Research Database (Denmark)

    Munar, Ana Maria; Ooi, Can-Seng

    The evolution of the Web and the expansion of social media are transforming our heritage experiences. Social media offer an innovative element to personal travel reflections by providing digital global platforms on which tourists can create and publish their travel stories. Social media transform...... the traditional creative processes, distribution mechanisms and consumption patterns of these experiences. This study provides insight on how personal heritage moments are constructed, digitalized and shared. The methodological perspective adopted draws on a constructivist epistemology (Markham 2004...

  12. Prensa digital en 2006

    OpenAIRE

    2007-01-01

    Radiography about the situation of digital press in Spain in the beginning of 2006, including the next points: number of digital media, multimedia evolution, media without printed counterparts, participation services, search systems, free versus payment, and distribution with rss. The article includes a discussion in the IweTel list with the participation of Lluís Codina, Jorge Serrano Cobos, Àngels Jiménez and Rosana López Carreño.

  13. Boundaries in digital planes

    Directory of Open Access Journals (Sweden)

    Efim Khalimsky

    1990-01-01

    Full Text Available The importance of topological connectedness properties in processing digital pictures is well known. A natural way to begin a theory for this is to give a definition of connectedness for subsets of a digital plane which allows one to prove a Jordan curve theorem. The generally accepted approach to this has been a non-topological Jordan curve theorem which requires two different definitions, 4-connectedness, and 8-connectedness, one for the curve and the other for its complement.

  14. Digital scholarship, tenure & barometers

    OpenAIRE

    Weller, Martin

    2012-01-01

    Martin Weller highlights the essential responsibility on the side of the university in institutionalising recognition and reward for academics’ digital activities. Furthermore, he argues a university’s response on digital practice can serve as a barometer for their own overall innovation and success. This article originally appeared on Martin Weller’s personal blog, The Ed Techie and is reposted under a Creative Commons License.

  15. Fabelagtig digital isvinter

    DEFF Research Database (Denmark)

    Mygind, Sarah

    2015-01-01

    Hybrid: Merete Pryds Helles litterære app sætter helt nye standarder for digital litteratur til børn. Hos ”Wuwu & Co.” kan man hverken tie eller sidde stille.......Hybrid: Merete Pryds Helles litterære app sætter helt nye standarder for digital litteratur til børn. Hos ”Wuwu & Co.” kan man hverken tie eller sidde stille....

  16. Traditional to Digital Books

    Institute of Scientific and Technical Information of China (English)

    JING XIAOLEI

    2010-01-01

    @@ A book fair wouldn't be a book fair without books.And while the number of book fairs in China has increased in recent years,the Guangzhou Book Fair has been helping to redefine the very nature of books by promoting digital works and reading technology.This year,the fair again set up an exclusive digital reading experience exhibition hall to showcase the host province's latest achievements in the field.

  17. Digital Identity Management Systems

    OpenAIRE

    Kuhar, Marko

    2010-01-01

    The goal of this thesis is a review of existing systems and technologies for managing digital identities. After the selection of the two most promising systems there will be a detailed comparison for a typical environment. In the first part of my thesis, the theory for understanding issues of identity management is introduced. Furthermore, the difference between identity and digital identity is explained and identity management itself is interpreted. An example of identity management solut...

  18. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2010-01-01

    Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Autumn 2010 Extent: 7.5 ects Class size: 18......Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Autumn 2010 Extent: 7.5 ects Class size: 18...

  19. Digital Communication and Modulation

    DEFF Research Database (Denmark)

    Sørensen, John Aasted

    2010-01-01

    Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Spring 2010 Extent: 7.5 ects Class size: 9......Fundamental principles in modern digital communication system like modems and wire- and wireless transmission over physical channels. Class room sessions and projects. Semester: Spring 2010 Extent: 7.5 ects Class size: 9...

  20. Advanced digital optical communications

    CERN Document Server

    Binh, Le Nguyen

    2015-01-01

    This book provides a fundamental understanding of digital communication applications in optical communication technologies. Emphasizing operation principles versus mathematical analysis, the Second Edition includes new coverage of superchannel optical transmission systems, metropolitan and long-haul optical systems and networks, and Nyquist pulse shaping and high spectral efficiency of optical transmission systems, as well as new homework problems and examples. Featuring theoretical foundations as well as practical case studies, the text focuses on enhancements to digital technologies that are

  1. Digitalization of daycare institutions

    DEFF Research Database (Denmark)

    Chimirri, Niklas Alexander

    The digitalization of Danish daycare institutions is not only affecting the ways staff is documenting and reporting on its pedagogical work. It also appears to be redefining what pedagogical work itself is about, given the drastic increase in deployment of digital (mobile) media devices in the in......The digitalization of Danish daycare institutions is not only affecting the ways staff is documenting and reporting on its pedagogical work. It also appears to be redefining what pedagogical work itself is about, given the drastic increase in deployment of digital (mobile) media devices...... in the intergenerational interaction with as well as the intragenerational interaction among daycare children. To some extent, digital media usage, foremost of tablet computers, has seen a discursive and material normalization across a number Danish daycare institutions before at all clarifying how it could be rendered...... meaningful for the respective pedagogical practice. Against this background, the presentation will in particular explore what this digitalization process may entail for the aim of promoting reciprocal intergenerational communication and practice. It draws on recent work in childhood geography as well...

  2. Comparison Of Digital Radiographic Units

    Science.gov (United States)

    Wang, Yen

    1986-06-01

    A total PACS will be inevitable for radiology practice within several years. To achieve a total PACS for radiology, a satisfactory digital radiographic unit is required, because approximately 65% of digital data for PACS comes from digital radiographs. There are several possibilities for producing digital radiographs, and 3 - 4 companies have been marketing digital radiographic devices. Some data regarding the digital radiographic units on the market are compared. It will aid in assessing the current status and availability of this aspect of development, as well as providing a summary of further development of digital radiographic technology.

  3. A veterinary digital anatomical database.

    OpenAIRE

    Snell, J.R.; Green, R; Stott, G; Van Baerle, S.

    1991-01-01

    This paper describes the Veterinary Digital Anatomical Database Project. The purpose of the project is to investigate the construction and use of digitally stored anatomical models. We will be discussing the overall project goals and the results to date. Digital anatomical models are 3 dimensional, solid model representations of normal anatomy. The digital representations are electronically stored and can be manipulated and displayed on a computer graphics workstation. A digital database of a...

  4. From Digital Divides to Digital Inequality -- The Emerging Digital Inequality in the Norwegian Unitarian School

    Science.gov (United States)

    Krumsvik, Rune J.

    2008-01-01

    This position paper highlights existing and emerging, prospective digital divides in Norwegian schools and asks whether we are now moving from traditional digital divides to digital inequality in our digitized society and schools. Despite very good technology density in Norwegian society and schools in general, there is the reason to pay attention…

  5. Visualizations for Digital Libraries

    Directory of Open Access Journals (Sweden)

    Gang Wan

    2006-06-01

    Full Text Available The concept of digital libraries is familiar to both librarians and library patrons today. These new libraries have broken the limits of space and distance by delivering information in various formats via the Internet. Since most digital libraries contain a colossal amount of information, it is critical to design more user-friendly interfaces to explore, understand, and manage their content. One important technique for designing such interfaces is information visualization. Although computer-aided information visualization is a relatively new research area, numerous visualization applications already exist in various fields today. Furthermore, many library professionals are also starting to realize that combining information visualization techniques and current library technologies, such as digital libraries, can help library users find information more effectively and efficiently. This article first discusses three major tasks that most visualization for digital libraries emphasize, and then introduces several current applications of information visualization for digital libraries.

  6. Digital imaging in dentistry.

    Science.gov (United States)

    Essen, S Donovan

    2011-01-01

    Information technology is vital to operations, marketing, accounting, finance and administration. One of the most exciting and quickly evolving technologies in the modern dental office is digital applications. The dentist is often the business manager, information technology officer and strategic planning chief for his small business. The information systems triangle applies directly to this critical manager supported by properly trained ancillary staff and good equipment. With emerging technology driving all medical disciplines and the rapid pace at which it emerges, it is vital for the contemporary practitioner to keep abreast of the newest information technology developments. This article compares the strategic and operational advantages of digital applications, specifically imaging. The focus of this paper will be on digital radiography (DR), 3D computerized tomography, digital photography and digitally-driven CAD/CAM to what are now considered obsolescing modalities and contemplates what may arrive in the future. It is the purpose of this essay to succinctly evaluate the decisions involved in the role, application and implications of employing this tool in the dental environment

  7. Digital Information and Value

    Directory of Open Access Journals (Sweden)

    Paul Walton

    2015-11-01

    Full Text Available Digital information changes the ways in which people and organisations interact. This paper examines the nature of this change in the context of the author’s Model for Information (MfI. It investigates the relationship between outcomes and value, selection processes and some attributes of information and explores how this relationship changes in the move from analogue to digital information. Selection processes shape the evolution of information ecosystems in which conventions are established for the ways in which information is used. The conventions determine norms for information friction and information quality as well as the sources of information and channels used. Digital information reduces information friction, often dramatically, and changes information quality. The increasing use of analytics in business increasingly delivers predictive or prescriptive digital information. These changes are happening faster than information ecosystem conventions can change. The relationships established in the paper enable an analysis of, and guide changes to, these conventions enabling a more effective use of digital information.

  8. 77 FR 50723 - Verification, Validation, Reviews, and Audits for Digital Computer Software Used in Safety...

    Science.gov (United States)

    2012-08-22

    ... and auditing of digital computer software used in the safety systems of nuclear power plants. In... part, that a quality assurance program be established and implemented to provide adequate assurance...

  9. 77 FR 50726 - Software Requirement Specifications for Digital Computer Software and Complex Electronics Used in...

    Science.gov (United States)

    2012-08-22

    ... COMMISSION Software Requirement Specifications for Digital Computer Software and Complex Electronics Used in... Digital Computer Software and Complex Electronics used in Safety Systems of Nuclear Power Plants.'' The DG... National Standards Institute and Institute of Electrical and Electronics Engineers (ANSI/IEEE) Standard...

  10. Impacts of Digital Imaging versus Drawing on Student Learning in Undergraduate Biodiversity Labs

    Science.gov (United States)

    Basey, John M.; Maines, Anastasia P.; Francis, Clinton D.; Melbourne, Brett

    2014-01-01

    We examined the effects of documenting observations with digital imaging versus hand drawing in inquiry-based college biodiversity labs. Plant biodiversity labs were divided into two treatments, digital imaging (N = 221) and hand drawing (N = 238). Graduate-student teaching assistants (N = 24) taught one class in each treatment. Assessments…

  11. Digital collaborative learning: identifying what students value.

    Science.gov (United States)

    Hemingway, Claire; Adams, Catrina; Stuhlsatz, Molly

    2015-01-01

    Digital technologies are changing the learning landscape and connecting classrooms to learning environments beyond the school walls.  Online collaborations among students, teachers, and scientists are new opportunities for authentic science experiences.  Here we present findings generated on PlantingScience ( www.plantingscience.org), an online community where scientists from more than 14 scientific societies have mentored over 14,000 secondary school students as they design and think through their own team investigations on plant biology.  The core intervention is online discourse between student teams and scientist mentors to enhance classroom-based plant investigations.  We asked: (1) what attitudes about engaging in authentic science do students reveal, and (2) how do student attitudes relate to design principles of the program? Lexical analysis of open-ended survey questions revealed that students most highly value working with plants and scientists.  By examining student responses to this cognitive apprenticeship model, we provide new perspectives on the importance of the personal relationships students form with scientists and plants when working as members of a research community. These perspectives have implications for plant science instruction and e-mentoring programs.

  12. Environmental testing of an experimental digital safety channel

    Energy Technology Data Exchange (ETDEWEB)

    Korsah, K.; Tanaka, T.J.; Wilson, T.L. Jr.; Wood, R.T.

    1996-09-01

    This document presents the results of environmental stress tests performed on an experimental digital safety channel (EDSC) assembled at the Oak Ridge National Laboratory (ORNL) as part of the NRC-sponsored Qualification of Advanced Instrumentation and Controls (W) System program. The objective of this study is to investigate failure modes and vulnerabilities of microprocessor-based technologies when subjected to environmental stressors. The study contributes to the technical basis for environmental qualification of safety-related digital I&C systems. The EDSC employs technologies and digital subsystems representative of those proposed for use in advanced light-water reactors (ALWRs) or for retrofits in existing plants. Subsystems include computers, electrical and optical serial communication links, fiber-optic network links, analog-to-digital and digital-to-analog converters, and multiplexers. The EDSC was subjected to selected stressors that are a potential risk to digital equipment in a mild environment. The selected stressors were electromagnetic and radio-frequency interference (EMYRFI), temperature, humidity, and smoke exposure. The stressors were applied over ranges that were considerably higher than what the channel is likely to experience in a normal nuclear power plant environment. Ranges of stress were selected at a sufficiently high level to induce errors so that failure modes that are characteristic of the technologies employed could be identified.

  13. Digital Identifier Systems: Comparative Evaluation

    Directory of Open Access Journals (Sweden)

    Hamid Reza Khedmatgozar

    2015-02-01

    Full Text Available Identifier is one of the main elements in identifying an object in digital environment. Digital identifier systems were developed followed by a lot of problems such as violation of persistency and uniqueness of physical identifiers and URL in digital environment. These identifiers try to guarantee uniqueness and persistency of hostnames by using indirect names for Domain Name System (DNS. The main objective of this research is to identify qualified digital identifier system among other systems. To achieve the research objective, researchers have considered two major steps: first, identifying main criteria for distinguishing digital identifier based on literature review and focus group interview; and second, performing a comparative evaluation on common identifier systems in the world. Findings of first step demonstrated seven main criteria in three domains for distinguishing digital identifier systems: identifier uniqueness and persistency in the identifier features domain, digital identification, digital uniqueness, digital persistency and digital actionability in the digital coverage domain, and globality in the comprehensiveness of scope domain. In the second step, results of the comparative evaluation on common identifier systems indicated that six identifier systems, included, DOI, Handle, UCI, URN, ARK and PURL, are appropriate choices for using as a digital identifier system. Also, according to these results, three identification systems Including NBN, MARIAM and ISNI were identified as suitable choices for digital identification in certain specialized fields. According to many benefits of using these identifiers in important applied fields, such as, digital content chains and networks integration, digital right management, cross referencing, digital libraries and citation analysis, results of this study can help digital environment experts to diagnose digital identifier and their effective use in applied fields.

  14. Digital resonant current controllers for voltage source converters

    OpenAIRE

    Gomez Yepes, Alejandro

    2011-01-01

    Regulación de corriente senoidal en convertidores en fuente de tensión es un aspecto fundamental para lograr un alto nivel de rendimiento en una gran variedad de aplicaciones, como pueden ser accionamientos de motores eléctricos, filtros activos de potencia, turbinas eólicas, inversores fotovoltaicos o rectificadores activos. Uno de los tipos de reguladores de corriente más extendidos son los controladores resonantes, que consiguen error nulo en régimen permanente a determinadas frecuenci...

  15. Towards Digital Integration

    DEFF Research Database (Denmark)

    Schou, Finn

    2006-01-01

    of the original “paper and pencil” tools and procedures for conceptual sketching of product style. Through presentation of literature studies and by case studies in the fashion business (eyewear design), this paper puts forward why the penetration of digital tools and methodologies for conceptual styling so far...... has been low. This paper advocates for a paradigm shift. The claim is that implementing digital tools and methodologies is a necessity in order to heighten concept generation productivity - and the outcome. For businesses seeking incremental as well as radical innovation there is no alternative.......In 1963, Ivan Sutherland at MIT in his doctoral dissertation, “Sketchpad” introduced a program that has hence been broadly acknowledged as a major step towards drawing digitally. 43 years later the majority of industrial designers within diverse businesses to a high degree still lean upon the use...

  16. Secure medical digital libraries.

    Science.gov (United States)

    Papadakis, I; Chrissikopoulos, V; Polemi, D

    2001-12-01

    In this paper, a secure medical digital library is presented. It is based on the CORBA specifications for distributed systems. The described approach relies on a three-tier architecture. Interaction between the medical digital library and its users is achieved through a Web server. The choice of employing Web technology for the dissemination of medical data has many advantages compared to older approaches, but also poses extra requirements that need to be fulfilled. Thus, special attention is paid to the distinguished nature of such medical data, whose integrity and confidentiality should be preserved at all costs. This is achieved through the employment of Trusted Third Parties (TTP) technology for the support of the required security services. Additionally, the proposed digital library employs smartcards for the management of the various security tokens that are used from the above services.

  17. Critical Digital Tourism Studies

    DEFF Research Database (Denmark)

    Gyimóthy, Szilvia; Munar, Ana María

    2013-01-01

    ) are approached mostly from a business administration perspective and informed by conceptual frameworks developed in management and marketing. IT studies in tourism are still at a stage similar to the first advocacy phase of tourism research in general (Jafari, 1990) and are seldom inspired by relevant......This paper advocates the need for a critical and cross-disciplinary research agenda on the field of digital technologies and tourism. The changing virtual landscape of tourism has received increased attention by tourism scholars. However, contemporary studies on information technologies (IT...... to studying digital socio-technical systems and virtual mediation in tourism. Critical Digital Tourism Studies opens a new cross-disciplinary field where the sociality of virtual tourism interactions is examined (entailing the study of structures, social rules, ideologies, power relations, sustainability...

  18. Digital chest radiography

    DEFF Research Database (Denmark)

    Debess, Jeanne Elisabeth; Vejle-Sørensen, Jens Kristian; Thomsen, Henrik;

    2015-01-01

    of clinical supervisors. Optimal collimation is determined by European and Regional Danish guidelines. The areal between current and optimal collimation is calculated. The experimental research is performed in September - October 2014 Siemens Axiom Aristos digital radiography system DR using 150 kV, 1,25 -3......Purpose: Quality improvement of basic radiography focusing on collimation and dose reduction in digital chest radiography Methods and Materials:A retrospective study of digital chest radiography is performed to evaluate the primary x-ray tube collimation of the PA and lateral radiographs. Data from...... one hundred fifty self-reliant female patients between 15 and 55 years of age are included in the study. The clinical research is performed between September and November 2014 where 3rd year Radiography students collect data on four Danish x-ray departments using identical procedures under guidance...

  19. Digital signal coding

    Energy Technology Data Exchange (ETDEWEB)

    Gaunt, R.

    1997-05-01

    It seems that digital video has gone by as many names as Jim Blinn has Siggraph ribbons. Some of its various formats and names are: DV, Dl, 4:2:2, CCIR 601-1, ITU-Rec. 601-4,, SMPTE RP125M, and SMPTE 259M. CCIR and CCITT were both absorbed into their parent organization, the International Telecommunications Union (ITU), so technically speaking, CCIR 601 has been renamed to ITU-Rec. 601-4 (``Rec.`` stands for recommendation). But convention is often hard to change, so for some time you will see and hear Dl and CCIR 601 used for serial digital component video. Below are brief descriptions of the various names and formats for digital video.

  20. Towards Digital Integration

    DEFF Research Database (Denmark)

    Schou, Finn

    2006-01-01

    In 1963, Ivan Sutherland at MIT in his doctoral dissertation, “Sketchpad” introduced a program that has hence been broadly acknowledged as a major step towards drawing digitally. 43 years later the majority of industrial designers within diverse businesses to a high degree still lean upon the use...... of the original “paper and pencil” tools and procedures for conceptual sketching of product style. Through presentation of literature studies and by case studies in the fashion business (eyewear design), this paper puts forward why the penetration of digital tools and methodologies for conceptual styling so far...... has been low. This paper advocates for a paradigm shift. The claim is that implementing digital tools and methodologies is a necessity in order to heighten concept generation productivity - and the outcome. For businesses seeking incremental as well as radical innovation there is no alternative....

  1. Comparative digital holography.

    Science.gov (United States)

    Osten, Wolfgang; Baumbach, Torsten; Jüptner, Werner

    2002-01-01

    We described a method for direct holographic comparison of the shape or the deformation of two objects when it is not necessary that both samples be located at the same place. In contrast to the well-known incoherent techniques based on inverse fringe projection, this new approach uses a coherent mask that is imaged onto a sample object that has a microstructure different from that of the master object. The coherent mask is created by digital holography to permit instant access to complete optical information on the master object at any wanted place. Transmission of the digital master holograms to the relevant places can be made with a broadband digital telecommunication network such as the Internet.

  2. CERN Courier goes digital

    CERN Multimedia

    Christine Sutton, CERN Courier editor

    2013-01-01

    The January/February 2013 issue of the CERN Courier offers a new way to access the content – the first digital edition of the magazine.   The CERN Courier dates back to August 1959, when the first issue appeared, consisting of 8 black-and-white pages. Since then it has seen many changes in design and layout, leading to the current full-colour editions of more than 50 pages on average. It went on the web for the first time in October 1998, when IOP Publishing took over the production work. Now, we have taken another step forward with a digital edition that provides yet another means to access the content beyond the web and print editions, which continue as before. To download the digital edition, click here. To sign up to the new issue alert, please visit: http://cerncourier.com/cws/sign-up.

  3. Critical Digital Tourism Studies

    DEFF Research Database (Denmark)

    Gyimóthy, Szilvia; Munar, Ana María

    2013-01-01

    ) are approached mostly from a business administration perspective and informed by conceptual frameworks developed in management and marketing. IT studies in tourism are still at a stage similar to the first advocacy phase of tourism research in general (Jafari, 1990) and are seldom inspired by relevant......This paper advocates the need for a critical and cross-disciplinary research agenda on the field of digital technologies and tourism. The changing virtual landscape of tourism has received increased attention by tourism scholars. However, contemporary studies on information technologies (IT...... to studying digital socio-technical systems and virtual mediation in tourism. Critical Digital Tourism Studies opens a new cross-disciplinary field where the sociality of virtual tourism interactions is examined (entailing the study of structures, social rules, ideologies, power relations, sustainability...

  4. Photon counting digital holography

    Science.gov (United States)

    Demoli, Nazif; Skenderović, Hrvoje; Stipčević, Mario; Pavičić, Mladen

    2016-05-01

    Digital holography uses electronic sensors for hologram recording and numerical method for hologram reconstruction enabling thus the development of advanced holography applications. However, in some cases, the useful information is concealed in a very wide dynamic range of illumination intensities and successful recording requires an appropriate dynamic range of the sensor. An effective solution to this problem is the use of a photon-counting detector. Such detectors possess counting rates of the order of tens to hundreds of millions counts per second, but conditions of recording holograms have to be investigated in greater detail. Here, we summarize our main findings on this problem. First, conditions for optimum recording of digital holograms for detecting a signal significantly below detector's noise are analyzed in terms of the most important holographic measures. Second, for time-averaged digital holograms, optimum recordings were investigated for exposures shorter than the vibration cycle. In both cases, these conditions are studied by simulations and experiments.

  5. Digital chest radiography

    DEFF Research Database (Denmark)

    Debess, Jeanne Elisabeth; Johnsen, Karen Kirstine; Thomsen, Henrik

    2015-01-01

    Background: Chest radiography is one of the most common examinations in radiology departments. In 2013 approximately 80,000 chest x-rays were performed on women in the fertile age. Even low dose for the examinationCorrect collimation Purpose: Quality improvement of basic radiography focusing...... collimations depending on side of radiograph. Results from dose reduction will be presented on the congress Conclusion: Correct positioning and collimation of digital chest radiographs can reduce the radiation dose significant to the patients and by that improve the quality of basic radiography....... on collimation and dose reduction in digital chest radiography Methods and Materials A retrospective study of digital chest radiography is performed to evaluate the primary x-ray tube collimation of the PA and lateral radiographs. Data from one hundred fifty self-reliant female patients between 15 and 55 years...

  6. Digital Receiver Phase Meter

    Science.gov (United States)

    Marcin, Martin; Abramovici, Alexander

    2008-01-01

    The software of a commercially available digital radio receiver has been modified to make the receiver function as a two-channel low-noise phase meter. This phase meter is a prototype in the continuing development of a phase meter for a system in which radiofrequency (RF) signals in the two channels would be outputs of a spaceborne heterodyne laser interferometer for detecting gravitational waves. The frequencies of the signals could include a common Doppler-shift component of as much as 15 MHz. The phase meter is required to measure the relative phases of the signals in the two channels at a sampling rate of 10 Hz at a root power spectral density digital receiver. The input RF signal is first fed to the input terminal of an analog-to-digital converter (ADC). To prevent aliasing errors in the ADC, the sampling rate must be at least twice the input signal frequency. The sampling rate of the ADC is governed by a sampling clock, which also drives a digital local oscillator (DLO), which is a direct digital frequency synthesizer. The DLO produces samples of sine and cosine signals at a programmed tuning frequency. The sine and cosine samples are mixed with (that is, multiplied by) the samples from the ADC, then low-pass filtered to obtain in-phase (I) and quadrature (Q) signal components. A digital signal processor (DSP) computes the ratio between the Q and I components, computes the phase of the RF signal (relative to that of the DLO signal) as the arctangent of this ratio, and then averages successive such phase values over a time interval specified by the user.

  7. Digital therapy in diabetes.

    Science.gov (United States)

    Cahn, Avivit; Akirov, Amit; Raz, Itamar

    2017-09-05

    Diabetes care is largely dependent on patient self-management and empowerment, given that patients with diabetes must make numerous daily decisions of what to eat, when to exercise, and determine their insulin dose and timing if required. Additionally, patients and providers are generating vast amounts of data from many sources including electronic medical records, insulin pumps, sensors, glucometers, other wearables, as well as evolving genomic, proteomic, metabolomic and microbiomic data. Multiple digital tools and apps have been developed to assist patients to choose wisely, as well as enhance their compliance by employing motivational tools and incorporating incentives from social media and gaming techniques. The health care teams and health administrators benefit from digital developments which sift through the enormous amounts of patient generated data. Data is acquired, integrated, analyzed, and presented in a self-explanatory manner, highlighting important trends and items which require attention. Employment of decision support systems may propose data-driven actions which, for the most, require final approval by the patient or physician before execution, and once implemented may improve patient outcomes. The digital diabetes clinic aims to incorporate all digital patient data and provide individually tailored virtual or face-to-face visits to those persons who need them most. Digital diabetes care has demonstrated only modest HbA1c reduction in multiple studies, and borderline cost-effectiveness, although patient satisfaction appears to be increased. Better understanding of the barriers to digital diabetes care and identification of unmet needs may yield improved utilization of this evolving technology in a safe, effective and cost-saving manner. This article is protected by copyright. All rights reserved.

  8. Chronopolis Digital Preservation Network

    Directory of Open Access Journals (Sweden)

    David Minor

    2010-07-01

    Full Text Available The Chronopolis Digital Preservation Initiative, one of the Library of Congress’ latest efforts to collect and preserve at-risk digital information, has completed its first year of service as a multi-member partnership to meet the archival needs of a wide range of domains.Chronopolis is a digital preservation data grid framework developed by the San Diego Supercomputer Center (SDSC at UC San Diego, the UC San Diego Libraries (UCSDL, and their partners at the National Center for Atmospheric Research (NCAR in Colorado and the University of Maryland's Institute for Advanced Computer Studies (UMIACS.Chronopolis addresses a critical problem by providing a comprehensive model for the cyberinfrastructure of collection management, in which preserved intellectual capital is easily accessible, and research results, education material, and new knowledge can be incorporated smoothly over the long term. Integrating digital library, data grid, and persistent archive technologies, Chronopolis has created trusted environments that span academic institutions and research projects, with the goal of long-term digital preservation.A key goal of the Chronopolis project is to provide cross-domain collection sharing for long-term preservation. Using existing high-speed educational and research networks and mass-scale storage infrastructure investments, the partnership is leveraging the data storage capabilities at SDSC, NCAR, and UMIACS to provide a preservation data grid that emphasizes heterogeneous and highly redundant data storage systems.In this paper we will explore the major themes within Chronopolis, including:a The philosophy and theory behind a nationally federated data grid for preservation. b The core tools and technologies used in Chronopolis. c The metadata schema that is being developed within Chronopolis for all of the data elements. d Lessons learned from the first year of the project.e Next steps in digital preservation using Chronopolis: how we

  9. Artifacts in digital radiography

    Energy Technology Data Exchange (ETDEWEB)

    Min, Jung Whan [Dept. of Radiological Technology, Shin Gu University, Sungnam (Korea, Republic of); Kim, Jung Min [Dept. of Radiological Technology, Korea University, Seoul (Korea, Republic of); Jeong, Hoi Woun [Dept. of Radiological Technology, Beakseok Culture University, Cheonan (Korea, Republic of)

    2015-12-15

    Digital Radiography is a big part of diagnostic radiology. Because uncorrected digital radiography image supported false effect of Patient’s health care. We must be manage the correct digital radiography image. Thus, the artifact images can have effect to make a wrong diagnosis. We report types of occurrence by analyzing the artifacts that occurs in digital radiography system. We had collected the artifacts occurred in digital radiography system of general hospital from 2007 to 2014. The collected data had analyzed and then had categorize as the occurred causes. The artifacts could be categorized by hardware artifacts, software artifacts, operating errors, system artifacts, and others. Hardware artifact from a Ghost artifact that is caused by lag effect occurred most frequently. The others cases are the artifacts caused by RF noise and foreign body in equipments. Software artifacts are many different types of reasons. The uncorrected processing artifacts and the image processing error artifacts occurred most frequently. Exposure data recognize (EDR) error artifacts, the processing error of commissural line, and etc., the software artifacts were caused by various reasons. Operating artifacts were caused when the user did not have the full understanding of the digital medical image system. System artifacts had appeared the error due to DICOM header information and the compression algorithm. The obvious artifacts should be re-examined, and it could result in increasing the exposure dose of the patient. The unclear artifact leads to a wrong diagnosis and added examination. The ability to correctly determine artifact are required. We have to reduce the artifact occurrences by understanding its characteristic and providing sustainable education as well as the maintenance of the equipments.

  10. Digital signal processing laboratory

    CERN Document Server

    Kumar, B Preetham

    2011-01-01

    INTRODUCTION TO DIGITAL SIGNAL PROCESSING Brief Theory of DSP ConceptsProblem SolvingComputer Laboratory: Introduction to MATLAB®/SIMULINK®Hardware Laboratory: Working with Oscilloscopes, Spectrum Analyzers, Signal SourcesDigital Signal Processors (DSPs)ReferencesDISCRETE-TIME LTI SIGNALS AND SYSTEMS Brief Theory of Discrete-Time Signals and SystemsProblem SolvingComputer Laboratory: Simulation of Continuous Time and Discrete-Time Signals and Systems ReferencesTIME AND FREQUENCY ANALYSIS OF COMMUNICATION SIGNALS Brief Theory of Discrete-Time Fourier Transform (DTFT), Discrete Fourier Transform

  11. Digital signal processing

    CERN Document Server

    O'Shea, Peter; Hussain, Zahir M

    2011-01-01

    In three parts, this book contributes to the advancement of engineering education and that serves as a general reference on digital signal processing. Part I presents the basics of analog and digital signals and systems in the time and frequency domain. It covers the core topics: convolution, transforms, filters, and random signal analysis. It also treats important applications including signal detection in noise, radar range estimation for airborne targets, binary communication systems, channel estimation, banking and financial applications, and audio effects production. Part II considers sel

  12. Energy Efficient Digital Networks

    Energy Technology Data Exchange (ETDEWEB)

    Lanzisera, Steven [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Brown, Richard [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2013-01-01

    Digital networks are the foundation of the information services, and play an expanding and indispensable role in our lives, via the Internet, email, mobile phones, etc. However, these networks consume energy, both through the direct energy use of the network interfaces and equipment that comprise the network, and in the effect they have on the operating patterns of devices connected to the network. The purpose of this research was to investigate a variety of technology and policy issues related to the energy use caused by digital networks, and to further develop several energy-efficiency technologies targeted at networks.

  13. Digital audiovisual archives

    CERN Document Server

    Stockinger, Peter

    2013-01-01

    Today, huge quantities of digital audiovisual resources are already available - everywhere and at any time - through Web portals, online archives and libraries, and video blogs. One central question with respect to this huge amount of audiovisual data is how they can be used in specific (social, pedagogical, etc.) contexts and what are their potential interest for target groups (communities, professionals, students, researchers, etc.).This book examines the question of the (creative) exploitation of digital audiovisual archives from a theoretical, methodological, technical and practical

  14. Digital computers in action

    CERN Document Server

    Booth, A D

    1965-01-01

    Digital Computers in Action is an introduction to the basics of digital computers as well as their programming and various applications in fields such as mathematics, science, engineering, economics, medicine, and law. Other topics include engineering automation, process control, special purpose games-playing devices, machine translation and mechanized linguistics, and information retrieval. This book consists of 14 chapters and begins by discussing the history of computers, from the idea of performing complex arithmetical calculations to the emergence of a modern view of the structure of a ge

  15. Digital Standard Star Tracker

    Science.gov (United States)

    McQuerry, J. P., Jr.

    The Digital Standard Star Tracker (DSST) is an electro-optical instrument which provides position data used for precise attitude determination. The new DSST design uses flight-proven optical and sensor components from the BASD/NASA Standard Star Tracker (SST) programs while incorporating digital electronics techniques to improve producibility and reliability. This design approach has resulted in a new instrument capable of less than 10 arc second calibrated accuracy with 50 percent of the electrical components and only 10 percent of the electrical assemblies used in the SST.

  16. DAFX Digital Audio Effects

    CERN Document Server

    2011-01-01

    The rapid development in various fields of Digital Audio Effects, or DAFX, has led to new algorithms and this second edition of the popular book, DAFX: Digital Audio Effects has been updated throughout to reflect progress in the field. It maintains a unique approach to DAFX with a lecture-style introduction into the basics of effect processing. Each effect description begins with the presentation of the physical and acoustical phenomena, an explanation of the signal processing techniques to achieve the effect, followed by a discussion of musical applications and the control of effect parameter

  17. Understanding your digital identity

    OpenAIRE

    Williams, Shirley Ann; Fleming, Sarah Christine; Lundqvist, Karsten Oster; Parslow, Patrick Neil

    2010-01-01

    The term “Digital Identity” is used here to describe the persona a person projects across the internet. Your Digital Identity as perceived by other people is made up of material that you post yourself (for example photographs on Flickr and your own web page) but it also is made up of material other people put there about you (blog posts that mention you, photographs in which you are tagged). The “This is Me” project has developed resources that can be used by students and others to appreci...

  18. Digital cartography of Mars

    Science.gov (United States)

    Batson, R. M.

    1987-01-01

    A medium-resolution Digital Image Model (DIM) of Mars is being compiled. A DIM is a mosaic of radiometrically corrected, photometrically modelled spacecraft images displaying accurate reflectance properties at uniform resolution, and geometrically tied to the best available control. The Mars medium-resolution DIM contains approximately 4700 Viking Orbiter image frames that were used to compile the recently completed 1:2,000,000-scale controlled photomosaic series of Mars. This DIM provides a planimetric control base to which all other Mars maps will be registered. A similar control base of topographic elevations (Digital Terrain Model, or DTM) is also being compiled. These products are scheduled for completion in 1989.

  19. Unavailability analysis of digital engineered safety feature actuation system

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Hyun Gook; Jang, Seung Cheol [KAERI, Taejon (Korea, Republic of); Wiharjo, Sudarno [National Nuclear Agency-BATAN, Tangerang (Indonesia)

    2003-07-01

    This paper quantitatively presents the results of the fault tree analysis of Digital Engineered Safety Feature Actuation System which is one of the most important signal generation systems in nuclear power plant because it generates the signal for mitigating possible accidents. In this paper, as an example, we explore the case of auxiliary feedwater actuation signal. Based on the analysis results, we quantitatively explain the relationship between the important characteristics of digital systems and the system unavailability. Similarly to the PSA result of Digital Plant Protection System, we find out some factors remarkably affect the system unavailability. They are the common cause failures and the coverage of fault tolerant mechanisms. Human operator's backup also plays very important role. In this analysis we ignore the effect of software failure. We also compare the result with the PSA result of conventional analog Engineered Safety Feature Actuation System.

  20. PERSEPSI GURU TENTANG DIGITAL NATIVES, SUMBER BELAJAR DIGITAL DAN MOTIVASI MEMANFAATKAN SUMBER BELAJAR DIGITAL

    Directory of Open Access Journals (Sweden)

    Ferdinandus Bate Dopo

    2016-06-01

    TEACHER’S PERCEPTION OF DIGITAL NATIVES, DIGITAL LEARNING RESOURCES AND MOTIVATION TO UTILIZE DIGITAL LEARNING RESOURCES Abstract This study aims to reveal (1 the influence of teacher's perception of digital natives toward teacher’s motivation to utilize digital learning resources. (2 the influence of teacher's perception of digital learning resources toward teacher’s motivation to utilize digital learning resources and (3 the influence both of teacher's perception of digital natives and digital learning resources toward teacher’s motivation to utilize digital learning resources. This study used the descriptive-correlational quantitative approach. The Population and sample were high school teachers of Regina Pacis Bajawa, SMA Seminari Mataloko and SMA Negeri 1 Golewa. Sampling technique in this research was proportional random sampling. A questionnaire was used to obtain the data. The data were analyzed using the Likert scale. The instrument was developed based on lattice theory of assessment instruments relevant to the study variables. The analysis technique used is a regression followed by statistic technique of t test and F test with the significance level of 0.05. The results are as follows. (1 There is a positive and significant influence of teacher's perception of digital natives toward teacher’s motivation to utilize digital learning resources. (2 There is a positive and significant influence of teacher's perception of digital learning resources and teacher’s motivation to utilize digital learning resources. (3 There is a positive and significant influence both of teacher's perception of digital learning resources and teacher’s motivation to utilize digital learning resources. Keywords: perception, digital natives, digital learning resources, motivation

  1. 数字化核安全级仪控系统软件验证和确认平台的设计与实践%Design and Application of Software V & V Platform for Digital Safety I & C System Used in Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    张亚栋; 程建明

    2014-01-01

    在针对数字化核安全级仪控系统中的软件进行验证和确认(V&V)过程中,为了确保V&V工作可信、有效、高效地开展,构建一个软件V&V平台,支持包括准备、执行和管理等全过程的V&V活动。该V&V平台基于通用数据库,通过集成定制工具与商用工具,来提供V&V工作所需的方法和手段。通过多个核级软件的V&V项目的应用实践,证明该平台对于开展V&V活动发挥了重要作用,使得数字化核安全级仪控系统具有清晰证据支持的高安全性与高可靠性。%In the process of performing verification and validation (V&V) for software of digital safety I&C system used in nuclear power plant, this paper proposes to build a software V&V platform to support V&V activities such as preparation, implementation and management etc., in order to ensure acredibly, effectively and efficiently V&V. The proposed V&V platform which is based on common database, can provide methods and means required of V&V by integrating customized and commercial tools. The application practice of this V&V platform in multiple projects of nuclear safety software V&V have demonstrated its important role in carrying out V&V activities, making the digital safety I&C system used in nuclear power plant possess a clear evidence to support high safety and reliability.

  2. Digital Preservation in Open-Source Digital Library Software

    Science.gov (United States)

    Madalli, Devika P.; Barve, Sunita; Amin, Saiful

    2012-01-01

    Digital archives and digital library projects are being initiated all over the world for materials of different formats and domains. To organize, store, and retrieve digital content, many libraries as well as archiving centers are using either proprietary or open-source software. While it is accepted that print media can survive for centuries with…

  3. Digital Preservation in Open-Source Digital Library Software

    Science.gov (United States)

    Madalli, Devika P.; Barve, Sunita; Amin, Saiful

    2012-01-01

    Digital archives and digital library projects are being initiated all over the world for materials of different formats and domains. To organize, store, and retrieve digital content, many libraries as well as archiving centers are using either proprietary or open-source software. While it is accepted that print media can survive for centuries with…

  4. Digital Natives and Digital Immigrants: Teaching with Technology

    Science.gov (United States)

    Martin, Ellen Marie Peterson

    2011-01-01

    Education is witnessing an increasing demand for technology use in the classroom. At the same time, new teachers are entering the profession in high numbers, some being labeled as "Digital Natives" while others are labeled "Digital Immigrants". This qualitative case study investigated the technology practices of Digital Native and Digital…

  5. FORTRAN IV Digital Filter Design Programs. Digital Systems Education Project.

    Science.gov (United States)

    Reuss, E.; And Others

    The goals of the Digital Systems Education Project (DISE) include the development and distribution of educational/instructional materials in the digital systems area. Toward that end, this document contains three reports: (1) A FORTRAN IV Design Program for Low-Pass Butterworth and Chebychev Digital Filters; (2) A FORTRAN IV Design Program for…

  6. Digital Preservation: A Time Bomb for Digital Libraries.

    Science.gov (United States)

    Hedstrom, Margaret

    1998-01-01

    Argues that the difficulty and expense of preserving digital information is a potential impediment to digital library development. Discusses the present state of digital preservation, articulates requirements for users and custodians, and suggests research topics in storage media, migration, conversion, and overall management strategies. (DSK)

  7. Digital Downsides: Exploring University Students' Negative Engagements with Digital Technology

    Science.gov (United States)

    Selwyn, Neil

    2016-01-01

    Digital technologies are now an integral feature of university study. As such, academic research has tended to concentrate on the potential of digital technologies to support, extend and even "enhance" student learning. This paper, in contrast, explores the rather more messy realities of students' engagements with digital technology. In…

  8. Internationalt samarbejde om digital bevaring

    DEFF Research Database (Denmark)

    Zierau, Eld

    2014-01-01

    Hvorfor er internationalt samarbejde vigtigt for digital bevaring? Hvilke eksempler er der på internationalt samarbejde?......Hvorfor er internationalt samarbejde vigtigt for digital bevaring? Hvilke eksempler er der på internationalt samarbejde?...

  9. Experts views' on Digital Competence

    OpenAIRE

    Janssen, José; Stoyanov, Slavi

    2013-01-01

    Janssen, J., & Stoyanov, S. (2012, 20 November). Online Consultation for a Digital Competence Framework: Experts' views on Digital Competence. Workshop presentation at the Institute for Prospective Technological Studies, Seville, Spain.

  10. Analogical problems with digital data

    NARCIS (Netherlands)

    Widlok, T.

    2013-01-01

    Current initiatives of digitally archiving ethnographic and linguistic data promise considerable advantages with regard to longevity and accessibility. This article discusses these 'digital promises' in the context of projects funded by recent research programs on endangered languages and cultures.

  11. Time-to-digital converters

    CERN Document Server

    Henzler, Stephan

    2010-01-01

    This text covers the fundamentals of time-to-digital converters on analog and digital conversion principles. It includes a theoretical investigation into quantization, linearity, noise and variability, and it details a range of advanced TDC architectures.

  12. Digital can help with care.

    Science.gov (United States)

    2016-05-27

    Welcome to the June issue of Nursing Older People. This month, Deidre Wild and colleagues ask the digital question in the second part of their article on digital skills training in care homes ( page 31 ).

  13. The digital curriculum vitae.

    Science.gov (United States)

    Galdino, Greg M; Gotway, Michael

    2005-02-01

    The curriculum vitae (CV) has been the traditional method for radiologists to illustrate their accomplishments in the field of medicine. Despite its presence in medicine as a standard, widely accepted means to describe one's professional career and its use for decades as an accomplice to most applications and interviews, there is relatively little written in the medical literature regarding the CV. Misrepresentation on medical students', residents', and fellows' applications has been reported. Using digital technology, CVs have the potential to be much more than printed words on paper and offers a solution to misrepresentation. Digital CVs may incorporate full-length articles, graphics, presentations, clinical images, and video. Common formats for digital CVs include CD-ROMs or DVD-ROMs containing articles (in Adobe Portable Document Format) and presentations (in Microsoft PowerPoint format) accompanying printed CVs, word processing documents with hyperlinks to articles and presentations either locally (on CD-ROMs or DVD-ROMs) or remotely (via the Internet), or hypertext markup language documents. Digital CVs afford the ability to provide more information that is readily accessible to those receiving and reviewing them. Articles, presentations, videos, images, and Internet links can be illustrated using standard file formats commonly available to all radiologists. They can be easily updated and distributed on an inexpensive media, such as a CD-ROM or DVD-ROM. With the availability of electronic articles, presentations, and information via the Internet, traditional paper CVs may soon be superseded by their electronic successors.

  14. Digital Reference Service.

    Science.gov (United States)

    Mon, Lorri

    2000-01-01

    Discusses the increasing demand for digital reference services from government Web sites via email, and describes a partnership between the Government Printing Office and the federal depository library at the University of Illinois at Chicago to create electronic access to the Department of State Foreign Affairs Network (DOSFAN). (Author/LRW)

  15. Central Dogma Goes Digital.

    Science.gov (United States)

    Lin, Yihan; Elowitz, Michael B

    2016-03-17

    In this issue of Molecular Cell, Tay and colleagues (Albayrak et al., 2016) describe a new technique to digitally quantify the numbers of protein and mRNA in the same mammalian cell, providing a new way to look at the central dogma of molecular biology.

  16. Beyond digital interference cancellation

    NARCIS (Netherlands)

    Venkateswaran, V.

    2010-01-01

    One of the major drawbacks towards the realization of MIMO and multi-sensor wireless communication systems is that multiple antennas at the receiver each have their own separate radio frequency (RF) front ends and analog to digital converter (ADC) units, leading to increased circuit size and power c

  17. Digital media ethics

    DEFF Research Database (Denmark)

    Ess, Charles

    Designed as both a teaching text and reader for students and faculty across diverse disciplines, the book provides an "ethical toolkit" - an introduction to prevailing ethical frameworks - and shows their application to both general issues and specific case-studies in digital media (privacy...

  18. Digital Badges in Education

    Science.gov (United States)

    Gibson, David; Ostashewski, Nathaniel; Flintoff, Kim; Grant, Sheryl; Knight, Erin

    2015-01-01

    Digital badges provide new affordances for online educational activities and experiences. When used with points and leaderboards, a badge can become a gamification element allowing learners to compete with themselves or others, and to know how close they are to accomplishing a goal and acquiring its accompanying reputation. In this role, badges…

  19. Complex Digital Visual Systems

    Science.gov (United States)

    Sweeny, Robert W.

    2013-01-01

    This article identifies possibilities for data visualization as art educational research practice. The author presents an analysis of the relationship between works of art and digital visual culture, employing aspects of network analysis drawn from the work of Barabási, Newman, and Watts (2006) and Castells (1994). Describing complex network…

  20. DIGITAL TELEPHONE SWITCH: SOFTWARE

    Directory of Open Access Journals (Sweden)

    J. G. Viveros Talavera

    2003-07-01

    Full Text Available This paper describes the design of the program of control for a Digital Phone Switch (PBAX with a maximumcapacity of one hundred and twenty-eight lines (extensions and trunks. The control program was designedusing object-oriented programming and concurrent programming techniques.

  1. Selling digital music

    DEFF Research Database (Denmark)

    Hougaard, Jens Leth; Tvede, Mich

    2010-01-01

    This paper considers the market for digital music. We claim that the combination of the MP3 format and peer-to-peer networks has made music non-excludable and this feature is essential for the understanding of the economics of the music market. We study optimal business models for selling non...

  2. Selling digital music

    DEFF Research Database (Denmark)

    Hougaard, Jens Leth; Tvede, Mich

    This paper considers the market for digital music. We claim that the combination of the MP3 format and peer-to-peer networks has made music non-excludable and this feature is essential for the understanding of the economics of the music market. We study optimal business models for selling non...

  3. Digital Textbooks. Research Brief

    Science.gov (United States)

    Johnston, Howard

    2011-01-01

    Despite their growing popularity, digital alternatives to conventional textbooks are stirring up controversy. With the introduction of tablet computers, and the growing trend toward "cloud computing" and "open source" software, the trend is accelerating because costs are coming down and free or inexpensive materials are becoming more available.…

  4. The Digital Divide

    Science.gov (United States)

    Hudson, Hannah Trierweiler

    2011-01-01

    Megan is a 14-year-old from Nebraska who just started ninth grade. She has her own digital camera, cell phone, Nintendo DS, and laptop, and one or more of these devices is usually by her side. Compared to the interactions and exploration she's engaged in at home, Megan finds the technology in her classroom falls a little flat. Most of the…

  5. Orofacial digital syndrome

    Directory of Open Access Journals (Sweden)

    Kajal V Dave

    2013-01-01

    Full Text Available A case of a 10-year-old boy reported to us for delayed eruption of permanent teeth with classical features of orofacial digital syndrome (OFDS. The case of OFDS is being reported and the various clinico-radiological features of both type I and type II are compared. Chromosomal karyotyping of the case has also been performed.

  6. Complex Digital Visual Systems

    Science.gov (United States)

    Sweeny, Robert W.

    2013-01-01

    This article identifies possibilities for data visualization as art educational research practice. The author presents an analysis of the relationship between works of art and digital visual culture, employing aspects of network analysis drawn from the work of Barabási, Newman, and Watts (2006) and Castells (1994). Describing complex network…

  7. Beyond digital interference cancellation

    NARCIS (Netherlands)

    Venkateswaran, V.

    2010-01-01

    One of the major drawbacks towards the realization of MIMO and multi-sensor wireless communication systems is that multiple antennas at the receiver each have their own separate radio frequency (RF) front ends and analog to digital converter (ADC) units, leading to increased circuit size and power c

  8. Digital storytelling in Africa

    CSIR Research Space (South Africa)

    Marsden, G

    2010-09-01

    Full Text Available , both in the capture of stories and their retelling. Specifically, they look at: inspiring stories in District Six in Cape Town; capturing digital stories from users with low literacy levels and using virtual reality to retell indigenous and personal...

  9. Digital microarray analysis for digital artifact genomics

    Science.gov (United States)

    Jaenisch, Holger; Handley, James; Williams, Deborah

    2013-06-01

    We implement a Spatial Voting (SV) based analogy of microarray analysis for digital gene marker identification in malware code sections. We examine a famous set of malware formally analyzed by Mandiant and code named Advanced Persistent Threat (APT1). APT1 is a Chinese organization formed with specific intent to infiltrate and exploit US resources. Manidant provided a detailed behavior and sting analysis report for the 288 malware samples available. We performed an independent analysis using a new alternative to the traditional dynamic analysis and static analysis we call Spatial Analysis (SA). We perform unsupervised SA on the APT1 originating malware code sections and report our findings. We also show the results of SA performed on some members of the families associated by Manidant. We conclude that SV based SA is a practical fast alternative to dynamics analysis and static analysis.

  10. Introduction to digital communication systems

    CERN Document Server

    Wesolowski, Krzysztof

    2009-01-01

    Combining theoretical knowledge and practical applications, this advanced-level textbook covers the most important aspects of contemporary digital communication systems. Introduction to Digital Communication Systems focuses on the rules of functioning digital communication system blocks, starting with the performance limits set by the information theory. Drawing on information relating to turbo codes and LDPC codes, the text presents the basic methods of error correction and detection, followed by baseband transmission methods, and single- and multi-carrier digital modulations. The basi

  11. Digital Marketing Practices in Iceland

    OpenAIRE

    Björgvin Jóhannsson 1979

    2014-01-01

    As consumers are moving towards the digital media at an increasing rate marketers must follow. Past research has indicated that Icelandic marketers are lagging behind regarding their digital marketing practices. The purpose of this thesis was to offer insight into the digital marketing practice in Iceland on the basses of best practice according to the available literature assess the trends and where digital marketing headed. With this information, Icelandic marketers should be able to be...

  12. Practical digital electronics for technicians

    CERN Document Server

    Kimber, Will

    2013-01-01

    Practical Digital Electronics for Technicians covers topics on analog and digital signals, logic gates, combinational logic, and Karnaugh mapping. The book discusses the characteristics and types of logic families; sequential systems including latch, bistable circuits, counters and shift registers; Schmitt triggers and multivibrators; and MSI combinational logic systems. Display devices, including LED, LCD and dot matrix display; analog and digital conversion; and examples of and equipment for digital fault finding are also considered. The book concludes by providing answers to the questions

  13. A relação entre o conservadorismo contábil e os conflitos entre acionistas controladores e minoritários sobre as políticas de dividendos nas empresas brasileiras listadas na Bovespa The relation between accounting conservatism and conflicts on dividend policies between major and minor shareholders of Brazilian companies listed on Bovespa

    Directory of Open Access Journals (Sweden)

    Rosimeire Pimentel Gonzaga

    2009-08-01

    Full Text Available O principal objetivo deste trabalho foi buscar evidências empíricas quanto à relação do conservadorismo contábil com os conflitos sobre as políticas de dividendos entre acionistas minoritários e controladores nas companhias abertas listadas na Bovespa, compreendendo o período de 1995 a 2006. Os dados foram coletados no software Economática. Para o teste das hipóteses, usou-se regressão com dados em painel utilizando como proxies para conservadorismo contábil a medida baseada em accruals utilizada por Givoly e Hayn (2000 e a baseada no book-to-market proposta por Beaver e Ryan (2000. Os resultados encontrados corroboram os achados por Ahmed et al. (2002, indicando que há relação entre o conservadorismo contábil e os conflitos sobre as políticas de dividendos entre acionistas nas empresas da amostra. Porém, não é possível afirmar sobre tal relação quando a métrica de conservadorismo baseada em book-to-market é utilizada.The main objective of this study was to present empirical evidence on the relation between accounting conservatism and conflicts about dividend policies between majority and minority shareholders of Brazilian publicly traded companies listed on BOVESPA. Data for the period from 1995 to 2006 was retrieved from Economatica. To test the hypotheses, panel data regression was used with two proxies for accounting conservatism - the accrual-based measure used by Givoly and Hayn (2000 and the book-to-market-based measure proposed by Beaver and Ryan (2000. The results corroborate the findings by Ahmed et al. (2002, indicating a relation between accounting conservatism and conflicts about dividend policies between shareholders in the sample companies. The same cannot be affirmed, however, when the proxy based on book-to-market is employed.

  14. PELÍCULA ANTIMICROBIANA A BASE DE PROTEÍNA DE SUERO LÁCTEO, INCORPORADA CON BACTERIAS LÁCTICAS COMO CONTROLADOR DE Listeria monocytogenes, APLICADA SOBRE SALMÓN AHUMADO FILM ANTIMICROBIAL BASED WHEY PROTEIN, LACTIC ACID BACTERIA INCORPORATED AS CONTROLLER Listeria monocytogenes APPLIED TO SMOKED SALMON

    Directory of Open Access Journals (Sweden)

    DEYCI RODRÍGUEZ

    2009-12-01

    Full Text Available El concentrado de proteína de suero lácteo (CPS posee propiedades funcionales apropiadas para la elaboración de películas biopreservantes, siendo factible la incorporación de bacterias ácido lácticas (BAL productoras de sustancias tipo bacteriocina (STB y así, lograr un efecto controlador sobre Listeria monocytogenes al ser utilizada como cobertura sobre salmón ahumado. Las condiciones para la formación de la película fueron: CPS 12% p/v, glicerol 18% v/v, pH en solución formadora de película 7,0 y 8,0, y secado a 30°C por 16 horas. La actividad inhibitoria de la película incorporada con las cepas lácticas fue evaluada usando el método de difusión frente a un césped de L. monocytogenes y mediante el recuento en placa, obteniendo: la combinación de dos cepas BAL aumentó la actividad controladora sobre L. monocytogenes logrando reducir hasta 2,1 ciclos logarítmicos el crecimiento de este patógeno, bajo condiciones de refrigeración durante 15 días.The Whey protein concentrated (WPC has functional properties suitable for developing films biopreservantes. Thanks to the functional properties of its components, was feasible the incorporation of lactic acid bacteria (LAB producing substances type bacteriocins (STB and thus achieve and effective control Listeria monocytogenes to be applied on smoked salmon. The conditions for the formation of the film were: CPS 12% w/v, glycerol 18% v/v, pH of film-forming solution 7.0 and 8.0, and dried at 30°C for 16 hours. The study of inhibitory activity of the film incorporated with lactic strains was evaluated using the diffusion method against a lawn of L. monocytogenes and by plate counting, getting the combination BAL-A + B, increases the activity of controlling L. monocytogenes achieving 2.1 log units to reduce the growth of this pathogen under refrigeration for 15 days.

  15. Digital Equity and Intercultural Education

    Science.gov (United States)

    Resta, Paul; Laferrière, Thérèse

    2015-01-01

    Digital equity and intercultural education continue to be areas of concern in the emerging knowledge-based society. The digital divide is present across the globe as the result of a complex of factors such as the inequality in: access to hardware and connectivity; autonomy of use; digital and literacy skills; availability of technical and social…

  16. Digital synchronization and communication techniques

    Science.gov (United States)

    Lindsey, William C.

    1992-01-01

    Information on digital synchronization and communication techniques is given in viewgraph form. Topics covered include phase shift keying, modems, characteristics of open loop digital synchronizers, an open loop phase and frequency estimator, and a digital receiver structure using an open loop estimator in a decision directed architecture.

  17. The World of Digital Storytelling

    Science.gov (United States)

    Ohler, Jason

    2006-01-01

    Ohler describes the practice of making a digital story, which he defines as a brief narrative usually told in first person, combining writing with digital images and sound, and presented as a short movie. The art of digital storytelling, he asserts, enhances the teaching power of storytelling by teaching students valuable technical skills,…

  18. Dynamic Digital Libraries for Children.

    Science.gov (United States)

    Theng, Yin Leng; Mohd-Nasir, Norliza; Buchanan, George; Fields, Bob; Thimbleby, Harold; Cassidy, Noel

    The design of systems, including digital libraries, is often inspired by what technology makes possible. In user-centered design, design emphasizes users, their tasks and needs. The majority of current digital libraries are not designed for children. For digital libraries to be popular with children, they need to be fun and easy-to-use. This paper…

  19. What is 'Post-digital?'

    NARCIS (Netherlands)

    F. Cramer

    2014-01-01

    The term "post-digital" was coined in 2000 for electronic music, but reflecting on larger developments in technology and culture, to describe a perspective on digital information technology that is no longer focused on technical innovation or improvement. In the meantime, "post-digital" has acquired

  20. JCE Digital Library Grand Opening

    Science.gov (United States)

    Journal of Chemical Education, 2004

    2004-01-01

    The National Science, Technology, Engineering and Mathematical Education Digital Library (NSDL), inaugurated in December 2002, is developed to promote science education on a comprehensive scale. The Journal of Chemical, Education (JCE) Digital Library, incorporated into NSDL, contains its own collections of digital resources for chemistry…