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Sample records for substations aproveitamento funcional

  1. Functional utilization of control and digital protection systems in distribution substations; Aproveitamento funcional de sistemas de controle e protecao digitais em subestacoes de distribuicao

    Energy Technology Data Exchange (ETDEWEB)

    Brittes, Jose Luiz Pereira

    1996-07-01

    The application of Digital Protection and Control Systems (DPCS) in Utilities substations is a fundamental part for their Information System. Technological progress in Telematics provides nowadays, the implementation of open digital systems. But it is the wide exploitation of its potentiality that will be one of the survival factor in the competitive and multi-affair environment dictated by the new worldwide economical order. This exploitation is carried out in three levels inside the substation: at bay level, with inherent technological benefits, such as more efficient and reliable protection, data acquisition and registration, and smart control; at central level (substation), by the implantation of automatics with enormous operational and management profits; and a remote level, to whom DPCS's transpire like a very sophisticated large frame remote terminal units. (author)

  2. Funciones

    OpenAIRE

    Esteban Duarte, Pedro Vicente

    2015-01-01

    El concepto de función es tal vez el más importan en el Cálculo -- A partir de él, se definen el límite, la continuidad, la derivada, la integral de funciones, etc. -- Además, las funciones describen modelos en muchas ramas de la ciencia, como la Física, la Economía, la Biología, entre otras -- El estudio de las funciones, sus propiedades, gráficas e interpretaciones, acordes con el contexto, permiten describir un sin número de aplicaciones y solucionar una gran variedad de problemas de diver...

  3. Electric Substations

    Data.gov (United States)

    Department of Homeland Security — Substations. Substations are facilities and equipment that switch, transform, or regulate electric voltage. The Substations feature class includes taps, a location...

  4. Electric power substations engineering

    CERN Document Server

    McDonald, John D

    2012-01-01

    The use of electric power substations in generation, transmission, and distribution remains one of the most challenging and exciting areas of electric power engineering. Recent technological developments have had a tremendous impact on all aspects of substation design and operation. With 80% of its chapters completely revised and two brand-new chapters on energy storage and Smart Grids, Electric Power Substations Engineering, Third Edition provides an extensive updated overview of substations, serving as a reference and guide for both industry and academia. Contributors have written each chapt

  5. Electric power substations engineering

    CERN Document Server

    2003-01-01

    This book covers all aspects of substations, from the initial concept to design, automation, operation, and physical and cyber security. Written by members of the Institute of Electrical and Electronic Engineers (IEEE) Power Engineering Society (PES) Substations Committee, each section provides a tutorial and includes references for further reading and study. The authors use photographs and graphics to help the reader understand the material. Exploring the most recent technological developments regarding industry practice and standards, the book provides an extensive overview of substations th

  6. Substation noise screening tool

    Energy Technology Data Exchange (ETDEWEB)

    Maybee, Nigel; Everton, Pascal [HFP Acoustical Consultants Corp. (Canada)], email: nigel.maybee@hfpacoustical.com; Chow, Vincent [Altalink Management Ltd. (Canada)], email: Vincent.Chow@AltaLink.ca

    2011-07-01

    Alberta noise regulations require energy-related facilities to conduct predictions on sound levels, especially for large and medium noise sources. This is usually done with well-known modelling software, but that can be disadvantageous when assessing the noise impact of smaller noise sources, such as transformer substations. This paper focuses on the development of a spreadsheet substation noise screening tool to assess the noise impact of a small transformer substation with precision and ease-of-use. Three aspects must be considered: transformer sound levels, which can be provided by the manufacturer or extracted from accepted sound level references; sound power calculations, which depend on the substation size and operating regime; and sound propagation calculations, which take into account the distance of the receptor from the substation and sound absorption by the air and ground. Comparison of results obtained with this tool with results generated by standard sound modelling software shows the utility, accuracy and ease-of-use of this screening method for assessing the noise impact of transformer substations.

  7. PUREX new substation ATR

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, D.E.

    1997-05-12

    This document is the acceptance test report (ATR) for the New PUREX Main and Minisubstations. It covers the factory and vendor acceptance and commissioning test reports. Reports are presented for the Main 5 kV substation building, the building fire system, switchgear, and vacuum breaker; the minisubstation control building and switch gear; commissioning test; electrical system and loads inspection; electrical utilities transformer and cable; and relay setting changes based on operational experience.

  8. Summary of GOOSE Substation Communication

    Directory of Open Access Journals (Sweden)

    Xia Fei

    2015-01-01

    Full Text Available The fast real-time application message is an object-oriented substation event—GOOSE (Generic Object Oriented Substation Event. It mainly works on the process layers and bay layers of digital substation. GOOSE intelligent substation communication network can realize the key function of the overall intelligent sub-station functions. This paper will make a systematic analysis of GOOSE. At first, it will provide a detailed analysis of the transmission mechanism and process of GOOSE message. As certain practical operability lacks the actual application of the multicast filtering method which is applied to GOOSE message based on IEC61850 standard, this paper will summarize three message filtering methods, compare the advantages and disadvantages in topological networks of different kinds in accordance with the instantaneity of GOOSE intelligent substation communication network and draw a conclusion that the independent configuration scheme of GOOSE and SV can adapt to the requirement of times, so as to provide theoretical references for the selection of practical intelligent substation communication network in the future.

  9. Certification of district heating substations

    Energy Technology Data Exchange (ETDEWEB)

    2007-01-15

    These Technical Regulations, F:103-6, have been produced and published by the Swedish District Heating Association in conjunction with manufacturers. Approved testing is part of the process of obtaining certification for a district heating substation. In addition, the process includes a review of documentation and of the manufacturer's production inspection procedures. A certified unit fulfils the requirements set out in the Association's document F:101, General Technical Requirements. Until further notice, the Association has selected SP Technical Research Institute of Sweden for certification of district heating substations. Certification means that the quality and function/performance of a prefabricated district heating substation have been examined and approved. Certification test method F:103-6 includes both static and dynamic tests and inspections. Detailed information on the district heating substation and its properties is given in the certification test reports. The unique feature of this certification is that the test reports are in the public domain. This is possible because the Association has full right of insight into the certification process, and because testing is performed in accordance with test programmes and procedures decided by the Association. In this document (F: 103-6), the Association specifies what is to be reported when SP carries out inspections at the manufacturer's premises. This can include details of claims lodged with the manufacturer and/or non-compliances with the required specification of the district heating substation. Such cases will be considered by a Certification Panel. Test reports and certificates provide information on the district heating substation's properties and performance, which can be used when assessing the substations. The technical tests do not address the long-term properties of substations, but SP's inspection specifically includes visual examination and application of its

  10. Ashland Area Support Substation Project

    Energy Technology Data Exchange (ETDEWEB)

    1992-06-01

    The Bonneville Power Administration (BPA) provides wholesale electric service to the City of Ashland (the City) by transferring power over Pacific Power Light Company's (PP L) 115-kilovolt (kV) transmission lines and through PP L's Ashland and Oak Knoll Substations. The City distributes power over a 12.5-kV system which is heavily loaded during winter peak periods and which has reached the limit of its ability to serve peak loads in a reliable manner. Peak loads under normal winter conditions have exceeded the ratings of the transformers at both the Ashland and Oak Knoll Substations. In 1989, the City modified its distribution system at the request of PP L to allow transfer of three megawatts (MW's) of electric power from the overloaded Ashland Substation to the Oak Knoll Substation. In cooperation with PP L, BPA installed a temporary 6-8 megavolt-amp (MVA) 115-12.5-kV transformer for this purpose. This additional transformer, however, is only a temporary remedy. BPA needs to provide additional, reliable long-term service to the Ashland area through additional transformation in order to keep similar power failures from occurring during upcoming winters in the Ashland area. The temporary installation of another 20-MVA mobile transformer at the Ashland Substation and additional load curtailment are currently being studied to provide for sustained electrical service by the peak winter period 1992. Two overall electrical plans-of-service are described and evaluated in this report. One of them is proposed for action. Within that proposed plan-of-service are location options for the substation. Note that descriptions of actions that may be taken by the City of Ashland are based on information provided by them.

  11. 20 CFR 631.50 - Substate plan.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Substate plan. 631.50 Section 631.50 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR PROGRAMS UNDER TITLE III OF THE JOB TRAINING PARTNERSHIP ACT Substate Programs § 631.50 Substate plan. (a) In order to receive an...

  12. Medium voltage substation insulation coordination

    Energy Technology Data Exchange (ETDEWEB)

    Caccia, M.; Gambirasio, D. (SAE Sadelmi, Milan (Italy))

    1991-01-01

    With reference to the provisions contained in applicable CEI (Italian Electrotechnical Committee) and IEC (International Electrotechnical Commission) normatives, a review is made of design criteria for the coordination of medium voltage substation switchgear and control gear. The design problematics are discussed with reference to optimization of neutral grounding, three phase ac short circuit calculation methods, and methods for the evaluation of voltages in fault conditions.

  13. 20 CFR 631.82 - Substate allocation.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Substate allocation. 631.82 Section 631.82 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR PROGRAMS UNDER TITLE III OF THE JOB TRAINING PARTNERSHIP ACT Disaster Relief Employment Assistance § 631.82 Substate allocation...

  14. District heating substations - design and installation

    Energy Technology Data Exchange (ETDEWEB)

    2004-12-15

    These technical regulations for district heating substations are sector-wide regulations for the Swedish district heating sector, describing the design, installation, use and maintenance of substations. If a district heating substation is to operate in the best possible way, the building's space heating and domestic hot water systems must comply with the requirements in these regulations and with those issued by public authorities. These regulations also describe aspects that must be considered when substations need to be replaced. The use then of correct values for the building energy requirements ensures that the new substation will be properly matched to its duties. These regulations are intended for use by: - those responsible for contacts between the district heating supplier and the customer. - those who own, operate and/or administer a building or facility that is heated by district heating. - those who design, manufacture, purchase, test or install substations. It is recommended that enquiries should refer to the Swedish District Heating Association's technical regulations when specifying requirements. The procurement criteria described in these regulations should be applied when evaluating tenders

  15. Structural assessment of highway "N" power substation under earthquake loads.

    Science.gov (United States)

    2009-10-01

    In this study, the Highway N Substation was analyzed with a finite element model (FEM) for its vulnerability. The rigid bus and electric switch components were characterized with full scale shake table tests. Each component of the substation wa...

  16. Ashland Area Support Substation Project : Environmental Assessment.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1992-06-01

    The Bonneville Power Administration (BPA) provides wholesale electric service to the City of Ashland (the City) by transferring power over Pacific Power & Light Company`s (PP&L) 115-kilovolt (kV) transmission lines and through PP&L`s Ashland and Oak Knoll Substations. The City distributes power over a 12.5-kV system which is heavily loaded during winter peak periods and which has reached the limit of its ability to serve peak loads in a reliable manner. Peak loads under normal winter conditions have exceeded the ratings of the transformers at both the Ashland and Oak Knoll Substations. In 1989, the City modified its distribution system at the request of PP&L to allow transfer of three megawatts (MW`s) of electric power from the overloaded Ashland Substation to the Oak Knoll Substation. In cooperation with PP&L, BPA installed a temporary 6-8 megavolt-amp (MVA) 115-12.5-kV transformer for this purpose. This additional transformer, however, is only a temporary remedy. BPA needs to provide additional, reliable long-term service to the Ashland area through additional transformation in order to keep similar power failures from occurring during upcoming winters in the Ashland area. The temporary installation of another 20-MVA mobile transformer at the Ashland Substation and additional load curtailment are currently being studied to provide for sustained electrical service by the peak winter period 1992. Two overall electrical plans-of-service are described and evaluated in this report. One of them is proposed for action. Within that proposed plan-of-service are location options for the substation. Note that descriptions of actions that may be taken by the City of Ashland are based on information provided by them.

  17. Maintenance Optimization of High Voltage Substation Model

    Directory of Open Access Journals (Sweden)

    Radim Bris

    2008-01-01

    Full Text Available The real system from practice is selected for optimization purpose in this paper. We describe the real scheme of a high voltage (HV substation in different work states. Model scheme of the HV substation 22 kV is demonstrated within the paper. The scheme serves as input model scheme for the maintenance optimization. The input reliability and cost parameters of all components are given: the preventive and corrective maintenance costs, the actual maintenance period (being optimized, the failure rate and mean time to repair - MTTR.

  18. Using Immersive Virtual Reality for Electrical Substation Training

    Science.gov (United States)

    Tanaka, Eduardo H.; Paludo, Juliana A.; Cordeiro, Carlúcio S.; Domingues, Leonardo R.; Gadbem, Edgar V.; Euflausino, Adriana

    2015-01-01

    Usually, distribution electricians are called upon to solve technical problems found in electrical substations. In this project, we apply problem-based learning to a training program for electricians, with the help of a virtual reality environment that simulates a real substation. Using this virtual substation, users may safely practice maneuvers…

  19. 20 CFR 631.51 - Allowable substate program activities.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Allowable substate program activities. 631.51 Section 631.51 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR PROGRAMS UNDER TITLE III OF THE JOB TRAINING PARTNERSHIP ACT Substate Programs § 631.51 Allowable substate...

  20. 7 CFR 1726.77 - Substation and transmission line construction.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 11 2010-01-01 2010-01-01 false Substation and transmission line construction. 1726... and Transmission Facilities § 1726.77 Substation and transmission line construction. (a) Contract... substation and transmission line construction (including minor modifications or improvements), exclusive of...

  1. District heating substations. Performance, operation and design

    Energy Technology Data Exchange (ETDEWEB)

    Wollerstrand, J.

    1997-09-01

    This thesis work is concerned with the efficient layout and operation of substations, i.e. those district heating (DH) system units which connect the network and internal building heating systems, such as radiator heating systems and domestic hot water distribution networks. The ambition was to make realistic investigations closely related to practical technologies within the field

  2. Vendaje funcional de tobillo

    OpenAIRE

    Vázquez Amela, Xavier; Prats Climent, Baldiri; Vergès Salas, Carles

    1992-01-01

    El vendaje funcional es una técnica que intenta mantener, estabilizar, suplir y reforzar unas estructuras biológicas o anatómicas bien definidas. La utilización del vendaje funcional va destinada a permitir la práctica deportiva a pesar de la presencia de una lesión músculo-ligamentosa o para prevenir la aparición de la misma. Esto explica que los vendajes sean un método terapéutico para limitar de forma selectiva un solo grado de libertad de movimiento, lo que permite al deportista continuar...

  3. Insulators: estructura y funciones

    OpenAIRE

    Fresán Salvo, Ujué

    2016-01-01

    [spa] Los insulators son complejos de DNA y proteínas, cuya función no solo consiste en impedir la comunicación enhancer-promotor y/o bloquear la expansión del silenciamiento de la heterocromatina como clásicamente se habían descrito. Median interacciones intra e intercromosomales, cuyo objetivo fmal es la organización del genoma en diferentes dominios, regulando por consiguiente las funciones del DNA. Uno de los objetivos de esta tesis fue la búsqueda de nuevas funciones de proteínas insulat...

  4. Vendaje Funcional Tobillo

    OpenAIRE

    Julián Rochina, Iván

    2012-01-01

    El profesor Vicente Tormo aplica un vendaje funcional para la distensión de los ligamentos peroneo-astragalino anterior y posterior. En el caso de la distensión del ligamento deltoideo, se aplican el mismo número y tipo de tiras activas pero con dirección opuesta a la de este caso.

  5. Digital Metering System of New Generation Smart Substation in China

    Directory of Open Access Journals (Sweden)

    Bai Jingfen

    2016-01-01

    Full Text Available The new generation of smart substation is a summary and improvement of the earlier intelligent substations within the past 5 years. As a part of the substation operation function, the electric energy metering system must adapt to the requirements of the new generation smart substation which is more intelligent, full digitalization, networked and integrated. With the features of digitized, easy information sharing, and hardware shared, the digital measurement system is the inevitable choice for the new generation smart substation. This paper is the first literature to introduce the concept and structure of the digital metering system. The composition and technical characteristics of the new generation Smart Substation measurement system are introduced in detail.

  6. Project FOOTPRINT: Substation modeling and simulations for E1 pulses

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, Scott D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Larson, D. J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Kirkendall, B. A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2017-11-06

    This report includes a presentation with an: Introduction to CW coupling; Introduction to single-pulse coupling; Description of E1 waveforms; Structures in a substation yard --articulated (as part of the substation's defined electrical functionality)--unarticulated (not as part of the substation's defined electrical functionality); Coupling --electrical coupling (capacitive coupling) --magnetic coupling (inductive coupling); Connectivity to long-line transmission lines; Control infrastructure; Summary; and References.

  7. Magnetic field management of substations in high rise buildings

    Energy Technology Data Exchange (ETDEWEB)

    Farag, A.S.; Al-Shehri, A.M. [King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia); Cheng, T.C.; Du, Y.; Hu, L.; Penn, D. [Univ. of Southern California, LADWP, Los Angeles, CA (United States)

    1995-12-01

    The electric and magnetic field issue has become an area of increasing public concern. Utilities have been carrying out extensive projects to characterize and manage the magnetic fields around their substations in an effort to answer public concerns over the possible health hazard caused by these fields. This paper describes various techniques available for managing magnetic field strength levels in substations. The design guideline aids in the planning, design, construction of substation facilities. Low-frequency magnetic field is directly associated with current-carrying sources and its magnitude is proportional to the distance from the sources. Distribution substations in high-rise buildings are very close to public areas and the magnetic fields imposed by these substations might be relatively higher than that imposed by outdoor substations. Options to manage these substations fields are considered in this paper. Techniques to manage magnetic fields in substations such as: source relocation, compaction, rephasing, return-current control, passive and active shielding are discussed. Several techniques were applied to reduce the magnetic fields in the conference room located in the main floor above a substation located in the basement of the main office high-rise building of LADWP. 10 refs, 14 figs, 3 tabs

  8. Neuroimagen funcional y lenguaje

    OpenAIRE

    Deus Yela, Juan

    2012-01-01

    El lenguaje es uno de nuestros dominios cognitivos más preciados. El estudio de dicha función neuropsicológica en las tres últimas décadas mediante técnicas de neuroimagen, y específicamente a través de la resonancia magnética funcional (RMf), ha proporcionado nuevos datos acerca del procesamiento cerebral del lenguaje y ha ampliado los clásicos ya conocidos. Básicamente se pueden definir cinco ámbitos de interés que se detallan en el presente artículo. El primero se centra en delimitar las á...

  9. Funciones sociales del folclore

    Directory of Open Access Journals (Sweden)

    Alberto Londoño Álvarez

    1969-07-01

    Full Text Available Con el objeto de estudiar los principales aspectos sociológicos del folclore, empecemos con uno de los problemas más significativos, cual es el análisis de sus funciones que cumple en una sociedad. se trata de un asunto perteneciente al sociólogo, quien, con el propósito de mostrar al folclórogo, que su investigación no es única, porque se refiere a un hecho que pertenece al grupo de los fenómenos sociales.

  10. Measurement of ground potential difference at power substations

    Energy Technology Data Exchange (ETDEWEB)

    Lipavsky, P. (Cincinnati Bell Telephone, Cincinnati, OH (US)); Nienaber, R.E. (Cincinnati Gas and Electric Co., OH (USA))

    1991-01-01

    Increasing sensitivity of electronic equipment, such as the integrated services digital network, and closer association of telephone and power facilities increase the importance of an accurate determination of ground potential difference (GPD) during a ground fault in or near a power substation. A method of recording actual values of GPD using six years of records at four large substations is presented and analyzed.

  11. Discovering conformational sub-states relevant to protein function.

    Directory of Open Access Journals (Sweden)

    Arvind Ramanathan

    2011-01-01

    Full Text Available Internal motions enable proteins to explore a range of conformations, even in the vicinity of native state. The role of conformational fluctuations in the designated function of a protein is widely debated. Emerging evidence suggests that sub-groups within the range of conformations (or sub-states contain properties that may be functionally relevant. However, low populations in these sub-states and the transient nature of conformational transitions between these sub-states present significant challenges for their identification and characterization.To overcome these challenges we have developed a new computational technique, quasi-anharmonic analysis (QAA. QAA utilizes higher-order statistics of protein motions to identify sub-states in the conformational landscape. Further, the focus on anharmonicity allows identification of conformational fluctuations that enable transitions between sub-states. QAA applied to equilibrium simulations of human ubiquitin and T4 lysozyme reveals functionally relevant sub-states and protein motions involved in molecular recognition. In combination with a reaction pathway sampling method, QAA characterizes conformational sub-states associated with cis/trans peptidyl-prolyl isomerization catalyzed by the enzyme cyclophilin A. In these three proteins, QAA allows identification of conformational sub-states, with critical structural and dynamical features relevant to protein function.Overall, QAA provides a novel framework to intuitively understand the biophysical basis of conformational diversity and its relevance to protein function.

  12. A Structural Approach and Deployment of a Substation Automation System

    Energy Technology Data Exchange (ETDEWEB)

    You, Jeong Sik; Lee, Kwon Han; Choi, Dae Hee; Choi, Yong Bum; Lee, Hak Sung [Hyosung Corporation (Korea)

    2001-07-01

    This paper describes the definition of a substation automation system and presents core components and its layered structure based on the modular approach. Also it introduces the implementation and deployment of our substation automation system which was adopted to the field recently. (author). 2 refs., 5 figs., 1 tab.

  13. Grizzly Substation Fiber Optics : Environmental Assessment.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1998-02-01

    This notice announces BPA`s decision to construct, operate, and maintain the Grizzly Substation Fiber Optic Project (Project). This Project is part of a continuing effort by BPA to complete a regionwide upgrade of its existing telecommunications system. The US Forest Service and BPA jointly prepared the Grizzly Substation Fiber Optic Project Environmental Assessment (EA) (DOE/EA-1241) evaluating the potential environmental impacts of the Proposed Action, the Underground Installation Alternative, and the No Action Alternative. Based on the analysis in the EA, the US Forest Service and BPA have determined that the Proposed Action is not a major Federal action significantly affecting the quality of the human environment, within the meaning of the National Environmental Policy Act (NEPA) of 1969. Therefore, the preparation of an Environmental Impact Statement (EIS) is not required and BPA is issuing this FONSI. The US Forest Service has separately issued a FONSI and Decision Notice authorizing BPA to construct, operate, and maintain the Project within the Crooked River National Grassland (Grassland).

  14. Arquitectura, arte funcional

    Directory of Open Access Journals (Sweden)

    Monjo Carrió, Juan

    1985-10-01

    Full Text Available The begining of this work is devoted to the analysis of the concepts of Art, Science and Technique and their historical evolution, distinguishing between "fine arts" and "technique arts". Following, Architect and Architecture terms are defined both conceptual and professionally, analysing as well its historical evolution and pointing out the interdependence between the architectural conception as "fine art" and the constructive technology as "technique art", finally reminding the necessary scientific base of this one (Construction Physics. Consequently, the need for architecture professionals of constructive technology knowledge, is also reminded. At last, the functional character of the Architecture (Architecture as a "functional art" is analysed, going over the three basic aspects of this functionality (Integrity-firmitas, Habitability-utilitas and Aesthetics-venustas.Se inicia el trabajo analizando los conceptos de Arte, Ciencia y Técnica y su evolución histórica, distinguiendo entre ¡as "bellas artes" y las "artes técnicas". A continuación se definen los conceptos de Arquitecto y Arquitectura, tanto conceptual como profesionalmente, analizando, asimismo, su evolución histórica y haciendo hincapié en la interdependencia entre la concepción arquitectónica como "bella arte" y la tecnología constructiva como "arte técnica", para terminar recordando la necesaria base científica de esta última (la Física de la Construcción. Como consecuencia, se recuerda la necesidad de los conocimientos de la tecnología constructiva en los arquitectos profesionales. Por último, se analiza el carácter funcional de la Arquitectura (Arquitectura como "arte funcional" y se hace un breve recorrido por los tres aspectos básicos de esa funcionalidad (Integridad-firmitas, Habitabilidad-utilitas y Estética-venustas.

  15. Study on noise prediction model and control schemes for substation.

    Science.gov (United States)

    Chen, Chuanmin; Gao, Yang; Liu, Songtao

    2014-01-01

    With the government's emphasis on environmental issues of power transmission and transformation project, noise pollution has become a prominent problem now. The noise from the working transformer, reactor, and other electrical equipment in the substation will bring negative effect to the ambient environment. This paper focuses on using acoustic software for the simulation and calculation method to control substation noise. According to the characteristics of the substation noise and the techniques of noise reduction, a substation's acoustic field model was established with the SoundPLAN software to predict the scope of substation noise. On this basis, 4 reasonable noise control schemes were advanced to provide some helpful references for noise control during the new substation's design and construction process. And the feasibility and application effect of these control schemes can be verified by using the method of simulation modeling. The simulation results show that the substation always has the problem of excessive noise at boundary under the conventional measures. The excess noise can be efficiently reduced by taking the corresponding noise reduction methods.

  16. Evaluation of demand integrated substations; Utvaerdering av funktionsintegrerad fjaerrvaermecentral

    Energy Technology Data Exchange (ETDEWEB)

    Andersson, Sofie; Werner, Sven [FVB Sverige AB, Boraas (Sweden)

    2005-07-01

    Demand integrated substations contain an intelligent control unit, which recently has been developed by NordIQ Goeteborg AB. The purpose with this project has been to evaluate the benefits of this intelligent control unit. This evaluation project has been based on field measurement of hourly heat supply, circulated water, forward- and return temperatures in six substations with a 12 month reference period with the existing substation and another 12 month evaluation period with a demand integrated substation. The results from the evaluation show that: - The annual heat delivery was reduced by 10-11 % in average, when a new demand integrated substation replaced an existing conventional substation in the same building. - The annual cooling of the district heat fluid increased by 10-11 deg C, giving lower return temperatures in the district heating systems. The annual volume of circulated water was reduced with 33,200 m{sup 3} from the initial 112,800 m{sup 3} during the reference year. - The daily variation of the customer heat demand became less bumpy from lower morning peaks and heat demands moved to evenings and nights. The financial benefit from the intelligent control unit estimated as net present value is higher than the cost for new conventional substations. Applied to the whole Swedish district heat sector, this benefit has an annual value of about 1,6-2,0 billion SEK (180- 220 million Euro), corresponding to 7-9 % of the current price level for district heat in Sweden.

  17. Project aspects of a shared substation; Aspectos de projeto de uma subestacao compartilhada

    Energy Technology Data Exchange (ETDEWEB)

    Caparroz, Sergio L.; Oliveira Penteado Junior, Carlos de [Eletricidade de Sao Paulo SA, SP (Brazil)

    1991-12-31

    Technical and economic aspects of the reformulation on conventional substations, through the shared use of areas on the Sao Paulo town center, are discussed. Studies to the construction of more compact substations, areas and substations buildings, and the design of a shared substation, are also presented. 15 figs., 5 refs.

  18. 7 CFR 1726.76 - Substation and transmission line materials and equipment.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 11 2010-01-01 2010-01-01 false Substation and transmission line materials and... Substation and Transmission Facilities § 1726.76 Substation and transmission line materials and equipment. (a... $500,000 and for all materials. (b) Standards and specifications. Substation and transmission line...

  19. Landmark UHV transformers go to Kammer substation

    Energy Technology Data Exchange (ETDEWEB)

    Imbeau, G. [ABB Inc., Varennes, PQ (Canada)

    2010-01-15

    This article discussed new transformers built for a tie-in between American Electric Power (AEP) and Allegheny Energy (AE). The transformers were designed to increase electric transmission capabilities while increasing system reliability. The autotransformers had a large MVA rating, a high primary voltage, a very high low voltage, and low tertiary voltage ratings. The transformers weighed approximately 260 tons each and were installed at a substation site near Moundsville, West Virginia. Tests conducted on the units included special temperature rise tests; fast front switching impulse tests; and special termination lightening impulse tests. The tests were conducted to ensure the safe operation of the transformer insulation and cooling systems as well as for the overall transformer design. The core and coil assembly were designed to ensure that the transformers could be easily transported by rail. It was concluded that the transformers are enhancing electric power supply in the region. 4 figs.

  20. Funciones localmente inyectivas entre continuos

    National Research Council Canada - National Science Library

    Javier Camargo

    2011-01-01

    ...$ del dominio, existe un abierto $U$, con $x$ en $U$, tal que la restricción $f|_U$ es inyectiva. En este escrito, estudiaremos propiedades de las funciones localmente inyectivas definidas de un continuo sobre...

  1. INTELLIGENT DIAGNOSTIC SYSTEM OF EMERGENCY SITUATIONS IN TRACTION SUBSTATIONS DC

    Directory of Open Access Journals (Sweden)

    Sh. N. Nasyrov

    2009-09-01

    Full Text Available In the article the architecture and algorithm of operating an expert system providing the efficiency of functioning the electric equipment for traction substation as well as the four-parameter belonging function are determined.

  2. National SCADA Test Bed Substation Automation Evaluation Report

    Energy Technology Data Exchange (ETDEWEB)

    Kenneth Barnes; Briam Johnson

    2009-10-01

    Increased awareness of the potential for cyber attack has recently resulted in improved cyber security practices associated with the electrical power grid. However, the level of practical understanding and deployment of cyber security practices has not been evenly applied across all business sectors. Much of the focus has been centered on information technology business centers and control rooms. This report explores the current level of substation automation, communication, and cyber security protection deployed in electrical substations throughout existing utilities in the United States. This report documents the evaluation of substation automation implementation and associated vulnerabilities. This evaluation used research conducted by Newton-Evans Research Company for some of its observations and results. The Newton Evans Report aided in the determination of what is the state of substation automation in North American electric utilities. Idaho National Laboratory cyber security experts aided in the determination of what cyber vulnerabilities may pose a threat to electrical substations. This report includes cyber vulnerabilities as well as recommended mitigations. It also describes specific cyber issues found in typical substation automation configurations within the electric utility industry. The evaluation report was performed over a 5-month period starting in October 2008

  3. Uncertainty models applied to the substation planning

    Energy Technology Data Exchange (ETDEWEB)

    Fontoura Filho, Roberto N. [ELETROBRAS, Rio de Janeiro, RJ (Brazil); Aires, Joao Carlos O.; Tortelly, Debora L.S. [Light Servicos de Eletricidade S.A., Rio de Janeiro, RJ (Brazil)

    1994-12-31

    The selection of the reinforcements for a power system expansion becomes a difficult task on an environment of uncertainties. These uncertainties can be classified according to their sources as exogenous and endogenous. The first one is associated to the elements of the generation, transmission and distribution systems. The exogenous uncertainly is associated to external aspects, as the financial resources, the time spent to build the installations, the equipment price and the load level. The load uncertainly is extremely sensible to the behaviour of the economic conditions. Although the impossibility to take out completely the uncertainty , the endogenous one can be convenient treated and the exogenous uncertainly can be compensated. This paper describes an uncertainty treatment methodology and a practical application to a group of substations belonging to LIGHT company, the Rio de Janeiro electric utility. The equipment performance uncertainty is treated by adopting a probabilistic approach. The uncertainly associated to the load increase is considered by using technical analysis of scenarios and choice criteria based on the Decision Theory. On this paper it was used the Savage Method and the Fuzzy Set Method, in order to select the best middle term reinforcements plan. (author) 7 refs., 4 figs., 6 tabs.

  4. Alternativa para aproveitamento de água pluvial no Campus da ESTG

    OpenAIRE

    Farinha, Rui Pedro

    2015-01-01

    A água é um recurso essencial para todos os seres vivos, sendo necessário controlar a sua utilização. Tanto nos países que sofrem de escassez desse recurso como noutros países. O aproveitamento de água pluvial é uma medida que permite reduzir o consumo de água potável em utilizações onde não é necessária água com elevada qualidade. Na presente dissertação procedeu-se à realização de um estudo acerca dos sistemas de aproveitamento de água pluvial. Neste estudo dimensionaram-se dois siste...

  5. Conformational Sub-states and Populations in Enzyme Catalysis

    Energy Technology Data Exchange (ETDEWEB)

    Agarwal, Pratul K [ORNL; Doucet, Nicholas [INRS-Institut Armand-Frappier, University of Quebec; Chennubholta, C [University of Pittsburgh; Ramanathan, Arvind [ORNL

    2016-01-01

    reactants in the active site, chemical turnover, and release of products. In addition to formation of crucial structural interactions between enzyme and substrate(s), coordinated motions within the enzyme substrate complex allow reaction to proceed at a much faster rate, compared to the reaction in solution and in the absence of enzyme. An increasing number of enzyme systems show the presence of conserved protein motions that are important for function. A wide variety of motions are naturally sampled (over femtosecond to millisecond time-scales) as the enzyme complex moves along the energetic landscape, driven by temperature and dynamical events from the surrounding environment. Areas of low energy along the landscape form conformational sub-states, which show higher conformational populations than surrounding areas. A small number of these protein conformational sub-states contain functionally important structural and dynamical features, which assist the enzyme mechanism along the catalytic cycle. Identification and characterization of these higher-energy (also called excited) sub-states and the associated populations are challenging, as these sub-states are very short-lived and therefore rarely populated. Specialized techniques based on computer simulations, theoretical modeling, and nuclear magnetic resonance have been developed for quantitative characterization of these sub-states and populations. This chapter discusses these techniques and provides examples of their applications to enzyme systems.

  6. Algunos resultados de funciones semiuniversales

    Directory of Open Access Journals (Sweden)

    Jesús F. Tenorio

    2013-06-01

    Full Text Available En este artículo presentamos algunos resultados relacionados con funciones semiuniversales. Obtenemos teoremas de punto fijo para productos, conos y suspensiones sobre continuos. Abstract. In this paper we present some results concerning semiuniversal mappings. We obtain fixed point theorems for products, cones and suspensions over continua.

  7. Modernised DC traction substation recuperating energy of braking

    Directory of Open Access Journals (Sweden)

    Drozdowski Piotr

    2016-01-01

    Full Text Available The traction substation composed of the 3-phase transformer and the output diode rectifier is still the fundamental device for DC traction supply. In this paper two technical solutions (power electronic converters allowing for braking energy recuperation to the AC mains are discussed. This has been thought as the modernisation of the existing traction substations allowing for high speed trains regenerative braking and braking of heavy train hollers. Such a solution brings some profits: energy recuperation, mechanical brakes saving and enhanced quality of traction vehicle control. For the proposed converters technical and economical advantages and drawbacks are indicated.

  8. Interference with the pacemakers of two workers at electricity substations.

    Science.gov (United States)

    Butrous, G S; Bexton, R S; Barton, D G; Male, J C; Camm, A J

    1983-11-01

    Pacemaker function was tested in two electricity substation workers exposed to high tension electric fields. High intensity electric fields induced reversion to the interference mode, producing in one case competitive rhythm and in the other inappropriately slow pacing which resulted in asymptomatic pauses of up to 2.5 s. A suit designed to shield the body from the effects of high intensity electric fields was tried and proved to be effective in protecting the pacemaker, allowing it to function normally in the substations.

  9. Economic development of substations; Desarrollo economico de subestaciones

    Energy Technology Data Exchange (ETDEWEB)

    Martinez Fayo, Jose M.; Rando, Conrado Alberto [Empresa Distribuidora de Electricidad de Entre Rios S.A. (EDEERSA), Buenos Aires (Argentina)]. E-mail: jmartine@cmsenergy.com; carando@cmsenergy.com

    2001-07-01

    In substation projects the best economic alternative is that one which satisfies the objective in connection to technical and environmental requisites. To consider this last aspect is an imperative nowadays, defining clearly the measures of impact amortization whose incidence can be significant in relation to the total cost. The project environmental adaptation results direct or indirectly in cost reductions when turning viable its execution. Nevertheless, the economical optimization should include besides the initial work the subsequent enlargements, if there are for them alternative of different cost. These criteria can be exemplified when analysing aspects of the Gran Parana substation design (500/132 Kv - 300 Mva)

  10. 30 CFR 56.4130 - Electric substations and liquid storage facilities.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Electric substations and liquid storage... MINES Fire Prevention and Control Prohibitions/precautions/housekeeping § 56.4130 Electric substations... shall be stored or allowed to accumulate within 25 feet of the following: (1) Electric substations. (2...

  11. 30 CFR 57.4160 - Underground electric substations and liquid storage facilities.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Underground electric substations and liquid... Underground electric substations and liquid storage facilities. The requirements of this standard apply to...) Electric substations. (2) Unburied, combustible liquid storage tanks. (3) Any group of containers used for...

  12. FUNCIONES QUÍMICAS COMO FUNCIONES MATEMÁTICAS

    OpenAIRE

    B. Villegas

    2005-01-01

    Dado el concepto de función, uno de los más importantes en la matemática moderna, en el presente escrito se propone una función químico-matemática generalizada, se establece cómo opera y se dan ejemplos de funciones particulares derivadas de ella; además se anotan algunos alcances del concepto y de la función químico-matemática.

  13. Development of 12-Pulse Regulated Rectifier Circuit for Traction Substation

    Directory of Open Access Journals (Sweden)

    Sh. N. Nasirov

    2010-01-01

    Full Text Available The paper proposes a power circuit of a regulated 12-pulse direct current converter and a thyristor control impulse diagram for traction substations providing the best electric power supply of a rolling stock, train traction efficiency,  smooth direction regulation.

  14. BE 400/18 kV Substation Renovation Project

    CERN Document Server

    Vairo, Antonio

    2001-01-01

    The 400/18 kV SPS main substation was designed for the 400 GeV SPS project and was commissioned in 1974. It has been upgraded several times to form the present 400/66/18 kV SPS and LEP transmission power comprising 490 MVA and 240 MVAR installed power. The beginning of the LHC project and the obsolescence of the main elements, and consequently limited reliability, made it necessary to begin a complete renovation program. The new configuration of the substation will integrate the new compensator of reactive power efficiently into the 18 kV pulsed network. In this way the new compensator will facilitate the functioning of the pulsed network with the new loads and it will improve the performance of the electrical substation. The renovation program consists in a global reorganisation of the substation, with the total replacement of the 18 kV power equipment, a set up of new control and protection systems for the 18 kV and 400 kV section and the reconditioning of all the 400 kV equipment.

  15. MONITORING OF ELECTRICAL ENERGY QUALITY ON THE TRACTION SUBSTATION INPUT

    Directory of Open Access Journals (Sweden)

    O.G. Gryb

    2015-12-01

    Full Text Available For the implementation of measures to maintain the quality of the energy industrial enterprises have to spend a significant material and monetary assets. In this regard, significant is the feasibility study of the allocation of such funds and, primarily, the determination of the economic damage arising from low quality of electricity. The reliability of the electricity metering system, relay protection and automation of modern digital substations depends on the quality of electrical energy. At the present time to improve the reliability of the substation operation it is necessary to monitor indicators of quality of electric energy, allowing you to take organizational and technical solutions for their improvement. Monitoring the power quality at the input traction substation has shown that indicators such as the coefficient of the n-th harmonic component of the voltage does not meet the standards GOST 13109-97. The source of higher harmonics is a voltage Converter used on the locomotive. To eliminate higher harmonics in the supply network for traction substations will need to install power filters. Today, the USB-analyzer of power quality «Digital measurement system of power quality» type of CSICE of accuracy class 0.2. Work energy requires reliable and quality electricity supply to consumers. The new model of balancing energy market are bilateral contracts. The main task of this market, it ensure the stable and reliable operation of the unified energy system of Ukraine, that is, transmission and supply of electricity of appropriate quality.

  16. Reliability 'H' scheme of HV/MV substations

    Directory of Open Access Journals (Sweden)

    Perić Dragoslav M.

    2015-01-01

    Full Text Available Substations (HV/MV connect transmission and distribution systems with consumers of electric energy. The selective search method was used for calculation of substation reliability, where all arrangement elements were grouped into blocks. Subject of the analysis was H-arrangements comprising air-insulated switchgears on the high voltage side of HV/MV substations with different number of feeder and transformer bays and diverse scope of the installed switching equipment. Failure rate and duration were used as main HV/MV substation equipment reliability indices. A large number of arrangements were classified into groups, and within a group the arrangements were ranked with the use of multiple criteria. It is shown that the reliability of the electricity transit depends on the equipment of field for the transit of electricity, which favors poorly equipped field. On the other hand, the reliability of transformation of the full power depends mostly on the equipment in coupling field. It is essential that in the coupling field, there are at least two disconnectors. Installation of the switch in the coupling field is meaningful only with appropriate protection, because it further improves reliability. Conclusions are drawn for phased construction and expansion of the single pole diagram with an additional field for the transmission line.

  17. Automatic Object Extraction from Electrical Substation Point Clouds

    Directory of Open Access Journals (Sweden)

    Mostafa Arastounia

    2015-11-01

    Full Text Available The reliability of power delivery can be profoundly improved by preventing wildlife-related power outages. This can be achieved by insulating electrical substation components with non-conductive covers. The manufacture of custom-built covers requires as-built models of the salient components. This study presents new, automated methodology to recognize key components of electrical substations from 3D LiDAR data acquired using terrestrial laser scanning. The proposed methodology includes six novel algorithms to recognize key components (fence, cables, circuit breakers, bushings and bus pipes of electrical substations. Three datasets with different resolutions and configurations are used in this study. A Leica HDS 6100 laser scanner was used to acquire the first dataset and a Faro Focus3D laser scanner was employed to collect the second and third datasets. The obtained results indicate that 178 and 171 out of 181 electrical substation elements were successfully recognized in the first and second dataset, respectively, and 183 out of 191 components were identified in the third dataset. The results also demonstrate that an average 97.8% accuracy and average 98.8% precision at the point cloud level can be achieved.

  18. performance assessment of substation site earthing using fluke ...

    African Journals Online (AJOL)

    2013-03-01

    Mar 1, 2013 ... Abstract. This study utilizes the automatic frequency control (AFC) feature in Fluke 1625 ground tester to analyze earth impedance in five power substations. Other conventional methods like the use of megger for impedance test runs short of responding to variation in supply frequency and not trustworthy.

  19. Major Refit for CERN's 400 kV Substation

    CERN Multimedia

    2001-01-01

    The 400 kV substation on the Prévessin site brings in the electricity that powers CERN's accelerators and the majority of the Laboratory's installations. It was originally built in the 1970s for the SPS, and is one of only five privately owned 400 kV sub-stations in France. Three of the others belong to the national railway company, SNCF, supplying the Paris-Marseilles TGV line, the other is at the Cadarache research centre near mouth of the Rhone. After nearly thirty years of service, CERN's substation has just undergone a complete overhaul. The new main 18 kV switchboard for the SPS pulsed network. The electricity supply for the original Prévessin substation was from the 400 kV EDF network, delivered through three 90 MW transformers at 18 kV to the SPS pulsed network, With the arrival of LEP, two 110 MW transformers were added to supply the new accelerator. Now, as CERN gears up for the LHC, additional pulsed power capacity is needed to supply the transfer lines carrying protons from...

  20. Performance Assessment of Substation Site Earthing Using Fluke ...

    African Journals Online (AJOL)

    This study utilizes the automatic frequency control (AFC) feature in Fluke 1625 ground tester to analyze earth impedance in ve power substations. Other conventional methods like the use of megger for impedance test runs short of responding to variation in supply frequency and not trustworthy. Earthing is the fundamental ...

  1. Load Flow Analysis of a 15Mva Injection Substation | Oshevire ...

    African Journals Online (AJOL)

    This study presents the load flow analysis of Otovwodo 33/11kV injection substation, Nigeria. It is an obvious fact that the planning, design and operation of power systems require load flow calculations to analyze the steady state of the system under various operating conditions, and equipment configuration. This load flow ...

  2. SUBSTATIONS OF DISTRICT HEATING SYSTEMS WITH PULSE COOLANT CIRCULATION

    Directory of Open Access Journals (Sweden)

    Andrey N. Makeev

    2017-01-01

    Full Text Available Abstract. Objectives The aim of the study is to generalise the results of the application of technologies and means for organising pulse coolant flow within a district heating system in order to increase its energy efficiency based on the organisation of local hydraulic shocks and the subsequent use of their energy to ensure the purification of heat energy equipment, intensify the heat transfer process and realise the possibility of transforming the available head from one hydraulic circuit to another. Methods Substations connecting the thermal power installations of consumers with heat networks via dependent and independent schemes are analytically generalised. The use of pulse coolant circulation is proposed as a means of overcoming identified shortcomings. Results Principal schemes of substations with pulse coolant circulation for dependent and independent connection of thermal power installations are detailed. A detailed description of their operation is given. The advantages of using pulse coolant circulation in substations are shown. The materials reflecting the results of the technical implementation and practical introduction of this technology are presented. Conclusion Theoretical analysis of the operation of the basic schemes of substations with pulse coolant circulation and the results of their practical application, as well as the materials of scientific works devoted to the use of the energy of a hydraulic impact and the study of the effect of pulse coolant flow on thermal and hydrodynamic processes, have yielded a combination of factors reflecting technical and economic rationality of application of pulse coolant circulation. 

  3. Improved district heating substation efficiency with a new control strategy

    Energy Technology Data Exchange (ETDEWEB)

    Gustafsson, Jonas; Delsing, Jerker; van Deventer, Jan [Div. of EISLAB, Dept. of Computer Science and Electrical Engineering, Luleaa University of Technology, 97187 Luleaa (Sweden)

    2010-06-15

    In this paper, we describe a new alternative control approach for indirectly connected district heating substations. Simulations results showed that the new approach results in an increased {delta} T across the substation. Results were obtained for both ideal and non-ideal operation of the system, meaning that less water must be pumped through the district heating network, and a higher overall fuel efficiency can be obtained in the district heating power plants. When a higher fuel efficiency is achieved, the usage of primary fuel sources can be reduced. Improved efficiency also increases the effective heat transfer capacity of a district heating network, allowing more customers to be connected to an existing network without increasing the heating plant or network capacity. Also, if combined heat and power plants are used to produce the heat, the increased {delta} T will result in a further improved overall fuel efficiency, as more electricity can be produced with colder cooling water. The idea behind the new control method is to consider the temperature of the water supplying the district heating substation with heat, often referred to as the primary supply temperature. This represents a logical next step, as currently, the only parameter generally taken into account or measured when controlling the temperature level of the radiator circuit is the local outdoor temperature. In this paper we show how the primary supply temperature together with thermodynamic knowledge of the building can be used to maximize the {delta} T across the district heating substation. (author)

  4. Optimal Allocation of Smart Substations in a Distribution System Considering Interruption Costs of Customers

    DEFF Research Database (Denmark)

    Sun, Lei; You, Shi; Hu, Junjie

    2016-01-01

    number and allocation of smart substations in a given distribution system is presented, with the upgrade costs of substations and the interruption costs of customers taken into account. Besides, the reliability criterion is also properly considered in the model. By linearization strategies, the SSAM......One of the major functions of a smart substation (SS) is to restore power supply to interrupted customers as quickly as possible after an outage. The high cost of a smart substation limits its widespread utilization. In this paper, a smart substation allocation model (SSAM) to determine the optimal...

  5. Aproveitamento teórico-prático da disciplina anatomia humana do curso de fisioterapia

    Directory of Open Access Journals (Sweden)

    Rodrigo Moreira Arruda

    Full Text Available A Anatomia Humana estuda as estruturas do corpo humano e as relações entre elas. Assim, seu ensino a estudantes da área da saúde, incluindo alunos de Fisioterapia, é de extrema importância. É necessário um bom aproveitamento nesta disciplina para se tornar um bom profissional, porém as estratégias de ensino-aprendizagem nesta disciplina têm sido bastante discutidas. Com base nesta premissa, este estudo teve por objetivos avaliar o aproveitamento teórico-prático dos discentes do curso de Fisioterapia na disciplina Anatomia Humana, bem como descrever as facilidades e dificuldades enfrentadas e suas implicações durante o curso. Para tanto, foi elaborado um questionário específico e utilizada também a avaliação dos professores realizada pelo Colegiado de Fisioterapia. O tratamento estatístico foi composto por análise descritiva e correlação de Pearson, sendo os dados analisados pelos programas Microsoft Excel® 2007 e Graphpad Prism®. Não se observou correlação entre desempenho do aluno e grau de satisfação diante de diferentes parâmetros analisados neste trabalho. O estudo revelou que os alunos apresentam aproveitamento satisfatório, mas há grandes insatisfações quanto à forma como a disciplina é conduzida.

  6. Clinical effects of funcional appliances

    OpenAIRE

    Orrego C., Herbet M.; Ex Profesor de Post Grado. Especialista de Odontopediatría, Área de ortodoncia. UNMSM. Egresado de la Maestría en Estomatología.UNMSM. Diplomado en Ortodoncia UPCH.

    2014-01-01

    The funtional appliances therapy used wifh a correct diagnosis is able to make changes in teeth and in our patients profile .At the present time functional appliances can be used with or without fíxed appliances getting satisfactory results in malocclusions treatment.This report presents clinical cases in order to evaluate theraphy results in vertical ,transversal and sagital planes. La ortopedía funcional de los maxilares es un recurso terapéutico que aplicado luego de un adecuado diagnos...

  7. Formação docente e justificativas sobre o baixo aproveitamento escolar

    Directory of Open Access Journals (Sweden)

    Ana Maria Falsarella

    2017-06-01

    Full Text Available O estudo explora a vinculação entre a formação docente e as justificativas correntes sobre o baixo aproveitamento escolar. Tem por objetivos: a discutir a ligação entre concepções sobre dificuldades de aprendizagem e formação docente; b destacar a relevância do estudo e da discussão sobre dificuldades de aprendizagem e seu enfrentamento na formação de professores; c apontar a importância de que os professores adquiram uma visão mais ampla sobre as repercussões das condições socioeconômicas no aproveitamento escolar dos alunos.  A partir de dificuldades observadas entre professores em distinguir problemas pontuais e transitórios de aprendizagem, o texto mostra como a circulação de culpas (da criança, da família, do grupo social, dos professores ou da escola impede uma discussão mais abrangente sobre as condições socioeconômicas que engendram o fracasso e a decorrente exclusão escolar, tanto a explícita (abandono e evasão quanto à implícita (acesso e frequência sem aprendizagem.

  8. Aproveitamento Integral de Alimentos e o seu Impacto na Saúde

    Directory of Open Access Journals (Sweden)

    Fabiane Toste Cardoso

    2015-12-01

    Full Text Available A fome e o desperdício de alimentos são dois grandes problemas enfrentados pelo Brasil, constituindo-se em um dos paradoxos do país, que é um dos maiores exportadores de alimentos e, também, campeão em desperdício. Este estudo aborda a importância do aproveitamento integral dos alimentos e a sua relação com a saúde das pessoas e do ambiente em que vivem, a partir da análise de estudos publicados anteriormente. Após a análise dos dados constantes nos estudos, concluiu-se que os resíduos alimentares desperdiçados podem ser utilizados para o desenvolvimento de ações que visem minorar a fome e a desnutrição, por meio do desenvolvimento de receitas nutritivas e de fácil manuseio, em nível doméstico, pelas famílias. Além disso, o aproveitamento integral dos alimentos poderá contribuir para a redução da produção de resíduos alimentares, com vistas a minimizar o impacto ambiental causado por tais resíduos.

  9. Alternative surfacing materials for weed control at BC Hydro substations

    Energy Technology Data Exchange (ETDEWEB)

    Wells, T.C.; Shrimpton, G.M.

    1997-04-01

    A two year study was conducted by BC Hydro in which a variety of surfacing materials were tested for their suitability for use in substations. Ideally, surfacing materials should have the following characteristics: high electrical resistivity in both dry and wet conditions, resistance to invasion by weeds, good driveability, good drainage, non-flammable, reasonably priced, no dust to foul conductors, and be aesthetically pleasing. Trials at Vernon Koksilah, and Ingledow substations were conducted to test the materials. A qualitative estimate of the amount of weed control provided by each material was recorded. The trials were meant to provide operational recommendations and screening information to allow for future testing of promising materials or combination of materials. Results showed that no single material meets all the desired criteria. The surfaces that best combined good weed control, electrical resistance and surface stability was a 15 cm deep layer of crushed gravel, especially if underlain by a layer of geotextile. 4 refs., 3 tabs., 1 fig.

  10. LIFE MANAGEMENT OF ASSET FROM HIGH VOLTAGE SUBSTATION

    Directory of Open Access Journals (Sweden)

    Sorina COSTINAŞ

    2010-11-01

    Full Text Available Companies have to reinvent continuously their business model. Maintenance can play a key role in the long-term profitability of a company. In Romania, especially since the liberalization of the energy market, the electrical companies are forced to identify and coordinate a lot of processes and to promote competitivity. It is necessary to work safety and be environmentally responsible in order to achieve electrical substations obiectives. In this paper will be presented maintenance strategy (replacement, upgrade or repair and informational aspects of decisional process (technical, financial, social politic, legal and risk aspects. Proposed methodology regarding the maintenance of electrical substation will be focused in how to improve the decisions for improving asset maintenance performance through ISO 9001/14001.

  11. Consumers of ancillary services in the electric substations

    Directory of Open Access Journals (Sweden)

    Marian Oşan

    2013-12-01

    Full Text Available The paper aims to identify the current state of ancillary services consumption in power station. In order to replace current methods of supply internal services with, modern solutions based on renewable, clean solutions that exceed current system performance at the lowest cost.. In addition, it has been identified the main consumers of power stations in order to approach the implementation phase of a hybrid system in substations.

  12. Interference with the pacemakers of two workers at electricity substations.

    OpenAIRE

    BUTROUS, G. S.; Bexton, R. S.; Barton, D G; Male, J C; Camm, A. J.

    1983-01-01

    Pacemaker function was tested in two electricity substation workers exposed to high tension electric fields. High intensity electric fields induced reversion to the interference mode, producing in one case competitive rhythm and in the other inappropriately slow pacing which resulted in asymptomatic pauses of up to 2.5 s. A suit designed to shield the body from the effects of high intensity electric fields was tried and proved to be effective in protecting the pacemaker, allowing it to functi...

  13. Offshore Substation Locating in Wind Farms Based on Prim Algorithm

    DEFF Research Database (Denmark)

    Hou, Peng; Hu, Weihao; Chen, Zhe

    2015-01-01

    to the electrical system layout, the optimal layout design work should be done with the consideration of the impact of the location of offshore substation on the submarine cable connection layout to minimize the investment of cables. This paper addresses a new method to optimize the OS location together...... with the cable connection layout. The results show that the proposed method is an effective way for offshore wind farm cable connection layout design....

  14. A Digital Power Quality Monitoring Equipment Designed for Digital Substation

    Science.gov (United States)

    Li, Wei; Wang, Xin; Geng, Jiewen

    2018-01-01

    Taking into account both current status and development trend of digital substation, this paper proposed a design of a new multi-channelled digital power quality monitoring equipment with high compatibility. The overall functional structure, hardware architecture, software architecture, interface architecture and some key techniques such as IEC 61850 modelling of transient event and harmonic measurement method under the condition of non-synchronous sampling are described in this paper.

  15. Simulation models and performance assessment of district heating substations

    OpenAIRE

    Vaillant Rebollar, Julio; Himpe, Eline; Janssens, Arnold

    2014-01-01

    Development of new technologies and methodologies regarding district heating substation operational control strategies are increasingly found nowadays. At the same time a great number of modern buildings are provided with energy monitoring and control systems which supervise and collect operating data from different energy components. Accordingly, an exemplary district heating systems is being implemented in the city of Kortrijk in Belgium, as part of a demonstration zero-carbon neighbo...

  16. La programación funcional

    OpenAIRE

    Rivadera, Gustavo Ramiro

    2008-01-01

    p. 64-77 El presente artículo pretende introducir al lector en el paradigma de la programación funcional, utilizando el lenguaje Haskell, un lenguaje funcional puro, de propósito general, que incluye muchas de las últimas innovaciones en el desarrollo de los lenguajes de programación funcionales.

  17. El sector público: funciones

    OpenAIRE

    Universitat de Barcelona. Grup d'Innovació Docent en Economia dels Impostos

    2016-01-01

    Tema 1. Esquemas de presentación del tema "Sector Público: Funciones". Incorpora datos actuales, gráficos, cuadros y tablas. Esquemes de la presentació del tema "Sector Públic: Funcions". Incorpora dades actuals, gràfics, quadres I taules.

  18. Substation interference on gas entrance of industrial plants

    Energy Technology Data Exchange (ETDEWEB)

    Freire, Paulo Edmundo; Giacommelo, Claudinei [PAIOL Engenharia, Paulinia, SP (Brazil)

    2009-12-19

    Industrial plants often have medium or high voltage electrical power entrance and also gas feeders. Often the main substation is located near the gas entrance, in the utilities area. When the occurrence of a phase to ground short-circuit in the substation, the pipeline and gas entrance that serves the plant may be exposed to high voltage soil potential, of the order of a few kilovolts, due to resistive coupling with the substation ground mesh. The consequences of this situation are reflected in various risks, with emphasis on: damage to the protective coating of the duct, due to the increased soil potential, in excess of its dielectric supportability (typically on the order of 5 kV); spread of potentially hazardous to duct exposed parts (valves, measuring place etc.); and damage to cathodic protection system components, as rectifier and insulating joins at gas entrance. This paper presents the investigations conducted in a factory that has a 69 kV main substation very close to the gas entrance, the order of a few meters away. The substation phase to ground short-circuit current is 7 kA, what causes a 9 kV soil potential near the gas pipe. It is presented the methodology for modeling the various elements involved in this process, the results of simulations made, arrangements been taken to reduce soil potential next to the duct to levels below 5 kV, and the measures for people and insulating joins protection. It is important to note that such problems usually will be solved with measures involving the entire grounding system of the industrial complex and also close to the duct (outside the industrial plant). The gas distribution companies should require from customers where this situation occurs, to ensure safety for people who have access to elements of its network, and for the integrity of their own ducts and cathodic protection components. The computer simulations developed for this work were made with the software Auto Grid, developed by the Canadian company Safe

  19. Vendaje funcional para la fascitis plantar

    OpenAIRE

    Julián Rochina, Iván

    2013-01-01

    El profesor Vicente Tormo aplica un vendaje funcional que aproxima a su centro geométrico las estructuras que configuran la planta del pie, con el objetivo de mantener relajada la fascia plantar durante la bipedestación.

  20. 30 CFR 57.4130 - Surface electric substations and liquid storage facilities.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Surface electric substations and liquid storage... accumulate within 25 feet of the following: (1) Electric substations. (2) Unburied, flammable or combustible... NONMETAL MINES Fire Prevention and Control Prohibitions/precautions/housekeeping § 57.4130 Surface electric...

  1. Optimization design of ground grid mesh of 132/33kv substation ...

    African Journals Online (AJOL)

    33kV substation. Ground grid mesh is made up of horizontal and vertical conductors connected with vertical rods buried under substation ground. The function of this structure is to effectively dissipate extremely high current generated in the ...

  2. An application of data mining in district heating substations for improving energy performance

    Science.gov (United States)

    Xue, Puning; Zhou, Zhigang; Chen, Xin; Liu, Jing

    2017-11-01

    Automatic meter reading system is capable of collecting and storing a huge number of district heating (DH) data. However, the data obtained are rarely fully utilized. Data mining is a promising technology to discover potential interesting knowledge from vast data. This paper applies data mining methods to analyse the massive data for improving energy performance of DH substation. The technical approach contains three steps: data selection, cluster analysis and association rule mining (ARM). Two-heating-season data of a substation are used for case study. Cluster analysis identifies six distinct heating patterns based on the primary heat of the substation. ARM reveals that secondary pressure difference and secondary flow rate have a strong correlation. Using the discovered rules, a fault occurring in remote flow meter installed at secondary network is detected accurately. The application demonstrates that data mining techniques can effectively extrapolate potential useful knowledge to better understand substation operation strategies and improve substation energy performance.

  3. An application of data mining in district heating substations for improving energy performance

    Directory of Open Access Journals (Sweden)

    Xue Puning

    2017-01-01

    Full Text Available Automatic meter reading system is capable of collecting and storing a huge number of district heating (DH data. However, the data obtained are rarely fully utilized. Data mining is a promising technology to discover potential interesting knowledge from vast data. This paper applies data mining methods to analyse the massive data for improving energy performance of DH substation. The technical approach contains three steps: data selection, cluster analysis and association rule mining (ARM. Two-heating-season data of a substation are used for case study. Cluster analysis identifies six distinct heating patterns based on the primary heat of the substation. ARM reveals that secondary pressure difference and secondary flow rate have a strong correlation. Using the discovered rules, a fault occurring in remote flow meter installed at secondary network is detected accurately. The application demonstrates that data mining techniques can effectively extrapolate potential useful knowledge to better understand substation operation strategies and improve substation energy performance.

  4. The San Bernabe power substation; La subestacion San Bernabe

    Energy Technology Data Exchange (ETDEWEB)

    Chavez Sanudo, Andres D. [Luz y Fuerza del Centro, Mexico, D. F. (Mexico)

    1997-12-31

    The first planning studies that gave rise to the San Bernabe substation go back to year 1985. The main circumstance that supports this decision is the gradual restriction for electric power generation that has been suffering the Miguel Aleman Hydro System, until its complete disappearance, to give priority to the potable water supply through the Cutzamala pumping system, that feeds in an important way Mexico City and the State of Mexico. In this document the author describes the construction project of the San Bernabe Substation; mention is made of the technological experiences obtained during the construction and its geographical location is shown, as well as the one line diagram of the same [Espanol] Los primeros estudios de planeacion que dieron origen a la subestacion San Bernabe se remontan al ano de 1985. La circunstancia principal que soporta esta decision es la restriccion paulatina para generar energia que ha venido experimentando el Sistema Hidroelectrico Miguel Aleman, hasta su desaparicion total, para dar prioridad al suministro de agua potable por medio del sistema de bombeo Cutzamala, que alimenta en forma importante a la Ciudad de Mexico y al Estado de Mexico. En este documento el autor describe el proyecto de construccion de la subestacion San Bernabe; se mencionan las experiencias tecnologicas obtenidas durante su construccion y se ilustra su ubicacion geografica, asi como un diagrama unifilar de la misma

  5. Development of Protection and Control Unit for Distribution Substation

    Science.gov (United States)

    Iguchi, Fumiaki; Hayashi, Hideyuki; Takeuchi, Motohiro; Kido, Mitsuyasu; Kobayashi, Takashi; Yanaoka, Atsushi

    The Recently, electronics and IT technologies have been rapidly innovated and have been introduced to power system protection & control system to achieve high reliability, maintainability and more functionality. Concerning the distribution substation application, digital relays have been applied for more than 10 years. Because of a number of electronic devices used for it, product cost becomes higher. Also, products installed during the past high-growth period will be at the end of lifetime and will be replaced. Therefore, replacing market is expected to grow and the reduction of cost is demanded. Considering above mentioned background, second generation digital protection and control unit as a successor is designed to have following concepts. Functional integration based on advanced digital technologies, Ethernet LAN based indoor communication network, cost reduction and downsizing. Pondering above concepts, integration of protection and control function is adopted in contrary to the functional segregation applied to the previous system in order to achieve one-unit concept. Also the adoption of Ethernet LAN for inter-unit communication is objective. This report shows the development of second-generation digital relay for distribution substation, which is equipped with control function and Ethernet LAN by reducing the size of auxiliary transformer unit and the same size as previous product is realized.

  6. APROVEITAMENTO DA SEMENTE DE AÇAÍ PARA PRODUÇÃO DE BEBIDA À BASE DE CAFÉ

    OpenAIRE

    Lara Santana Fernandes; UFV; Bruna Giaretta Martins; UFV; Juliana Lane Paixão; UFV; Lara Stela Mendes Lustoza; UFV; Daniel Mariano Leite; UFV

    2011-01-01

    O aproveitamento da semente de açaí em bebida à base de café é uma alternativa para a redução do impacto ambiental e para a agregação de valor ao resíduo da agroindústria de açaí. Objetivou–se com a condução do presente trabalho avaliar o aproveitamento da semente de açaí, subproduto do beneficiamento dos frutos, para a produção de uma bebida à base de café e semente de açaí. Foram feitas a torrefação e moagem da semente de açaí e de grãos de café, tendo sido analisada sensorialmente a beb...

  7. Canby Area Service Project : Substation and Associated Transmission Line : Environmental Assessment.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1992-02-01

    Bonneville Power Administration (BPA) provides power to Surprise Valley Electrification Corporation (SVEC) in Modoc County, California. BPA uses PacificCorp's substation and transmission facilities between Alturas and Canby, California to transfer power to SVEC's Canby Substation. In the next year, SVEC expects increased industrial, agricultural, and residential electric loads on their 69-kV transmission system south of Canby. SVEC's substation can accommodate only about 10 percent of the expected additional electric load. BPA's proposed action is intended to meet SVEC's increasing electric load. BPA proposes to meet SVEC's increasing energy load by tapping into BPA's existing BPA Malin-Warner 230-kV transmission line, and building an 7.9-mile transmission line to a new BPA substation. BPA proposes to build the new substation next to the west side of SVEC's Canby Substation (Figure 1). This new substation will allow SVEC to move the additional power over their existing transmission or distribution lines. This report is the environmental assessment of the potential impact of the proposed project. The assessment determined that no environmental impact statement'' is not required.

  8. Canby Area Service Project substation and associated transmission line. Environmental Assessment

    Energy Technology Data Exchange (ETDEWEB)

    1992-02-01

    Bonneville Power Administration (BPA) provides power to Surprise Valley Electrification Corporation (SVEC) in Modoc County, California. BPA uses PacificCorp`s substation and transmission facilities between Alturas and Canby, California to transfer power to SVEC`s Canby Substation. In the next year, SVEC expects increased industrial, agricultural, and residential electric loads on their 69-kV transmission system south of Canby. SVEC`s substation can accommodate only about 10 percent of the expected additional electric load. BPA`s proposed action is intended to meet SVEC`s increasing electric load. BPA proposes to meet SVEC`s increasing energy load by tapping into BPA`s existing BPA Malin-Warner 230-kV transmission line, and building an 7.9-mile transmission line to a new BPA substation. BPA proposes to build the new substation next to the west side of SVEC`s Canby Substation (Figure 1). This new substation will allow SVEC to move the additional power over their existing transmission or distribution lines. This report is the environmental assessment of the potential impact of the proposed project. The assessment determined that no ``environmental impact statement`` is not required.

  9. The fuzzy comprehensive evaluation on occupational health hazards of electric field in substation

    Science.gov (United States)

    Zhao, Xin; Wang, Jing; Gao, Yang; Chen, Tao

    2017-05-01

    In this paper, multilevel fuzzy analysis method is used to making a comprehensive evaluation on the health hazards of workers exposed to electric field in 500kV substation. The five different regions of 500kV substation is identified as the first level index, according to the specific measurement substation of each area to set up the second level index. The first level weight is established according to the proportion of the retention time of the workers in the different areas, and the weight of the second level is determined according to the proportion of the measuring points. Establishing five comment sets, and carrying out the fuzzy comprehensive evaluation according to the maximum membership principle, eventually come to the conclusion: although the measured data show that a small number of electric field intensity exposure value of 500kV substation beyond the requirements of the International Commission on non-ionizing radiation protection (ICNIRP) and the requirements of the People's Republic of China(PRC), but workers have very little contact time, therefore, it cannot be explained that there is a large occupational health hazard in 500kV substation. The multilevel fuzzy analysis method can be used to evaluate the health hazards of the electric field in the substation working environment well, it avoids the subjective and limitations of the traditional methods, and can be able to make a more accurate and objective judgment of the substation

  10. Expert systems in power substation operation and control

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Guilherme Moutinho; Lambert-Torres, Germano; Silva, Alexandre P. Alves da [Escola Federal de Engenharia de Itajuba, MG (Brazil)

    1994-12-31

    With digital technology being increasingly adopted in power substations (SE), perspectives are created for integration of supervision, control and protection systems in addition to making its process automation feasible. Once a SE is digitalized, the systems which previously were implemented physically will be able to be implemented by means of computer programs (software), allowing the expansion of its scope of operation. Studies and research performed at the international level have pointed to the utilization of Expert Systems (ES) as a more suitable alternative for representation and solution of the operation and control problems, especially those which do not have an established theory, which are provided with diagnosis characteristics and that associate themselves with fuzzy data and information. (author) 4 refs., 3 figs.

  11. Towards the Smart Grid: Substation Automation Architecture and Technologies

    Directory of Open Access Journals (Sweden)

    A. Leonardi

    2014-01-01

    Full Text Available This paper deals with Industrial Control Systems (ICS of the electrical sector and especially on the Smart Grid. This sector has been particularly active at establishing new standards to improve interoperability between all sector players, driven by the liberalization of the market and the introduction of distributed generation of energy. The paper provides a state-of-the-art analysis on architectures, technologies, communication protocols, applications, and information standards mainly focusing on substation automation in the transmission and distribution domain. The analysis shows that there is tremendous effort from the Smart Grid key stakeholders to improve interoperability across the different components managing an electrical grid, from field processes to market exchanges, allowing the information flowing more and more freely across applications and domains and creating opportunity for new applications that are not any more constraint to a single domain.

  12. The Application of Preventative and Diagnostic System for 765kV Substation

    Energy Technology Data Exchange (ETDEWEB)

    Kweon, D. J.; Choi, I. H.; Yoo, Y. P. [Korea Electric Power Research Institute (Korea); Jung, S. H.; Choi, Y. J. [Korea Electric Power Corporation (Korea); Choi, D. H.; Kim, K. K. [Hyosung Co., Ltd. (Korea)

    2000-07-01

    In this paper we introduce preventative and diagnostic systems developed to prevent substations from accidental fault of electric power transmitting apparatus. We propose monitoring and diagnostic system for ultra high voltage GIS and main transformer of 765kV substations as an example of preventative and diagnostic techniques being applied in Korea. We also present a guideline to construct and manage an expert system for this purpose. Finally, an engineering solution as a substation management support system is proposed. (author). 2 refs., 1 fig., 3 tabs.

  13. Measuring Occupational Exposure to Extremely Low-Frequency Electric Fields at 220 kV Substations.

    Science.gov (United States)

    Pirkkalainen, Herkko; Heiskanen, Timo; Tonteri, Juhani; Elovaara, Jarmo; Mika, Penttilä; Korpinen, Leena

    2017-11-01

    Earlier studies conducted at 400 and 110 kV substations in Finland have shown that the occupational exposure to electric fields can exceed the action levels (ALs) set by Directive 2013/35/EU. This is a case study investigating the level of occupational exposure experienced by workers at 220 kV substations in order to determine if the actions levels are being exceeded. The measurements were conducted at two old 220 kV substations in Finland. The higher AL of 20 kV m-1 was exceeded at both substations. © The Author 2017. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  14. Perspective loads of transformer substations at development of urban power supply systems

    Directory of Open Access Journals (Sweden)

    Svetlana Guseva

    2012-06-01

    Full Text Available In work the system approach to formation of the urban power supply system is given. The hierarchical structure of the construction, voltage levels and load densities is considered. The mathematical and geometrical modeling of service areas for transformer substations of diff erent voltage is fulfi lled. Determination of perspective loads of transformer substations is given. The method of graphic placement of transformer substations in the city territory for new substations at existing structure of networks is off ered. The calculation program Microsoft EXCEL and the graphic program AutoCad are used for realization of method. The method allows fi nding a rational decision for the development of urban power supply system on the beginning design stages in conditions of the information uncertainty.

  15. Implementation of superconducting fault current limiter for flexible operation in the power substation

    Science.gov (United States)

    Song, Chong Suk; Lee, Hansang; Cho, Yoon-sung; Suh, Jaewan; Jang, Gilsoo

    2014-09-01

    The concentration of large-scale power loads located in the metropolitan areas have resulted in high fault current levels during a fault thereby requiring the substation to operate in the double busbar configuration mode. However, the double busbar configuration mode results in deterioration of power system reliability and unbalanced power flow in the adjacent transmission lines which may result in issues such as overloading of lines. This paper proposes the implementation of the superconducting fault current limiter (SFCL) to be installed between the two substation busbars for a more efficient and flexible operation of the substation enabling both single and double busbar configurations depending on the system conditions for guaranteeing power system reliability as well as fault current limitations. Case studies are being performed for the effectiveness of the SFCL installation and results are compared for the cases where the substation is operating in single and double busbar mode and with and without the installation of the SFCL for fault current mitigation.

  16. MACsec Layer 2 Security in HSR Rings in Substation Automation Systems

    Directory of Open Access Journals (Sweden)

    Jesús Lázaro

    2017-01-01

    Full Text Available The smart-grid concept takes the communications from the enclosed and protected environment of a substation to the wider city or nationwide area. In this environment, cyber security takes a key role in order to secure the communications. The challenge is to be able to secure the grid without impacting the latency while, at the same time, maintaining compatibility with older devices and non secure services. At the lower level, added security must not interfere with the redundancy and the latency required for the real-time substation automation communications. This paper studies how to integrate IEEE MAC Security standard (MACsec in the substation environment, especially when used in substation system communications

  17. Electric and magnetic field testing in vicinity of 110/x kV substations

    OpenAIRE

    Grbić Maja; Pavlović Aleksandar; Hrvić Dejan; Vulević Branislav

    2016-01-01

    The levels of non-ionizing radiation (electric and magnetic fields) at power frequency, which occur near 110/x kV substations are analyzed in this paper. The results of electric field strength and magnetic flux density measurements in the vicinity of three typical substations of the aforementioned voltage level are shown. With the purpose of estimating the exposure of the population to these fields, the obtained results were compared to the reference maximum levels set for increased sensitivi...

  18. Static Electricity as Part of Electromagnetic Environment on High-Voltage Electrical Substation

    Directory of Open Access Journals (Sweden)

    M. I. Fursanov

    2012-01-01

    Full Text Available Causes of occurrences electrostatic discharges (ESD on high-voltage electric substation were investigated and dependences values ESD’s on parameters interaction structures, humidity of air were found. Experimental research values ESD’s on high-voltage electric substation and in man-made conditions was fulfilled. Uncertainty measurement’s was taken into consideration by research results analyze. Matching with research of other authors was made. Danger ESD’s for electric devises was established.

  19. Vendaje funcional para la ''mano abierta''

    OpenAIRE

    Rochina, Iván

    2013-01-01

    Se muestra la aplicación de un vendaje funcional para el tratamiento de las molestias ocasionadas por la distensión de los ligamentos propios de los huesos del carpo; Producción: SFPIE(www.uv.es/sfpie)|VLC Campus (www.vlc-campus.com)

  20. Funciones expresivas (comportamiento motor y lenguaje), comportamiento emocional y funciones ejecutivas en la discapacidad intelectual

    OpenAIRE

    Grau Rubio, Claudia

    2006-01-01

    Se describen las bases neurológicas del comportamiento motor, lenguaje, funciones ejecutivas y comportamiento emocional en las personas con discapacidad intelectual; las dificultades asociadas y cómo se puede intervenir.

  1. Offshore substation workers’ exposure to harmful factors – Actions minimizing risk of hazards

    Directory of Open Access Journals (Sweden)

    Paweł Janusz Piotrowski

    2016-02-01

    Full Text Available The current development of electric power industry in Poland, especially in the field of renewable energy sources, including wind power, brings about the need to introduce legislation on new work environment. The development of occupational safety and health (OSH regulations that must be met by new workplaces, such as offshore substations becomes necessary in view of the construction of modern offshore wind power plants – offshore wind farms. Staying on offshore substation is associated with an increased exposure to harmful health factors: physical, chemical, biological and psychophysical. The main sources of health risks on offshore substations are: temperature, electromagnetic field, noise from operating wind turbines, direct and alternating current, chemicals, Legionella bacteria and social isolation of people. The aim of this article is to draw attention to the problem of offshore substation workers’ exposure to harmful factors and to present methods of preventing and reducing the risk-related adverse health effects. In this paper, there are identified and described risks occurring on offshore substations (fire, explosion, lightning, accidents at work. Some examples of the means and the methods for reducing the negative impact of exposure on the human health are presented and discussed. The article also highlights the need to develop appropriate laws and health and safety regulations concerning the new working environment at the offshore substations. The review of researches and international standards shows that some of them can be introduced into the Polish labor market. Med Pr 2016;67(1:51–72

  2. APROVEITAMENTO DE RESÍDUOS VEGETAIS PARA PRODUÇÃO DE FAROFA TEMPERADA

    Directory of Open Access Journals (Sweden)

    Clarissa DAMIANI

    2011-12-01

    Full Text Available Dentre as alternativas para evitar desperdício, destaca-se o aproveitamento de partes de alimentos que, geralmente, são desprezadas. Considerando a necessidade em disponibilizar uma alimentação saudável e rica em nutrientes, a utilização de partes vegetais surge como alternativa para melhorar a qualidade nutricional do cardápio e reduzir o desperdício de alimentos. Assim, o objetivo foi desenvolver um produto, a partir de cascas de banana, chuchu e talos de couve. Para avaliação do novo produto foram realizadas análises de composição centesimal, perfil de ácidos graxos, análise microbiológica e sensorial. Quanto à composição centesimal, verificou-se que a farofa possui reduzido teor de carboidratos totais (42,84g/100g e valor energético (323,59kcal/100g. Dentre os ácidos graxos saturados foi identificado, em maiores quantidades, o ácido esteárico (30,34% e palmítico (16,46%, para os insaturados o destaque foi para o ácido oleico (29,27%. A análise sensorial mostrou que o produto desenvolvido obteve um bom nível de aceitação, com elevada intenção de compra (97%. Sendo assim, a farofa apresentou ser uma alternativa viável, colaborando para a diminuição de lixo orgânico e do desperdício, além de possuir bom valor nutricional.

  3. Modelagem de ciclos térmicos com aproveitamento energético de resíduos de esgoto

    OpenAIRE

    Leite, Sylvia Helena Pinto Chagas [UNESP

    2016-01-01

    Um dos grandes problemas existentes ainda no mundo diz respeito ao destino dado ao esgotamento doméstico, tanto do ponto de vista ambiental quanto do ponto de vista de planejamento de cidades. Diversas formas de aproveitamento dos resíduos de esgoto podem ser propostas, seja na forma de energia, seja na forma de produção de algum recurso ou matéria prima, tais como biogás, nutrientes, biocombustíveis, bioplásticos, biopesticidas, dentre outros. As tecnologias usualmente empregadas para o apro...

  4. Digest of "Utilization of Electric Vehicles Connected to Distribution Substations for Peak Shaving of Utility Network Loads"

    OpenAIRE

    Mägi, Marek

    2013-01-01

    Use of modern electric vehicles and their effective integration into power grids depends on the technologies applied around distribution substations. Distribution substations equipped with energy storing and V2G capability enable peak load shaving and demand response, which will reduce the need to make new investments into building new power sources or power grids to meet peak demand. This paper presents a distribution substation topology for utilizing electric vehicles as energy resource uni...

  5. A FLORA DO CERRADO E SUAS FORMAS DE APROVEITAMENTO UTILIZATION OF CERRADO FLORA

    Directory of Open Access Journals (Sweden)

    Cynthia Santos

    2007-09-01

    Full Text Available

    Para colher informações sobre as formas de utilização do cerrado, realizou-se um levantamento por meio de questionários aplicados nas regiões do país onde ocorre esse tipo de vegetação. As informações solicitadas foram: nome comum, local de ocorrência, época de floração, frutificação, partes utilizáveis e seu aproveitamento geral. Encontrou-se um número superior a 170 espécies que são utilizadas das mais diferentes formas. As famílias que se destacam em número de espécies são, em ordem decrescente: Leguminosae, Palmae, Apocynaceae, Solanaceae, Anacardiaceae, Euphorbiaceae, Bignoniaceae, Compositae, Vochysiaceae, Annonaceae, Sapindaceae, Myrtaceae, Convolvulaceae, Boraginaceae, Moraceae, Dilleniaceae, Guttiferae, Gentianaceae, Cucurbitaceae, Colchospermaceae, Bromeliaceae, Tiliacea, e Sapotaceae, entre outras de menor utilização.

    PALAVRAS-CHAVE: Cerrado; flora nativa; flora do cerrado; savana; savana flora.

    The uses of Brazilian cerrado vegetation were surveyed by means of a questionnaire, requesting common name, local of occurrence, flowering and fruitage time, usable parts and general utilization. Over 170 species were found, with a wide variety of uses. In decreasing order, the most frequent families were: Leguminosae, Palmae, Apocynaceae, Solanaceae, Anacardiaceae, Euphorbiaceae, Bignoniaceae, Compositae, Vochysiaceae, Annonaceae, Sapindaceae, Myrtaceae, Convolvulaceae, Boraginaceae, Moraceae,

  6. Implementation of superconducting fault current limiter for flexible operation in the power substation

    Energy Technology Data Exchange (ETDEWEB)

    Song, Chong Suk, E-mail: chong_suk@korea.ac.kr [School of Electrical Engineering, Korea University, Anam dong, Seonbukgu, Seoul 136-713 (Korea, Republic of); Lee, Hansang [School of Railway and Electrical Engineering, Kyungil University, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-701 (Korea, Republic of); Cho, Yoon-sung [Department of Electric and Energy Engineering, Catholic University of Daegu, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-702 (Korea, Republic of); Suh, Jaewan [School of Electrical Engineering, Korea University, Anam dong, Seonbukgu, Seoul 136-713 (Korea, Republic of); Jang, Gilsoo, E-mail: gjang@korea.ac.kr [School of Electrical Engineering, Korea University, Anam dong, Seonbukgu, Seoul 136-713 (Korea, Republic of)

    2014-09-15

    Highlights: • The power load concentrated in load centers results in high levels of fault current. • This paper introduces a fault current reduction scheme using SFCLs in substations. • The SFCL is connected in parallel to the bus tie between the two busbars. • The fault current mitigation using SFCLs is verified through PSS/e simulations. - Abstract: The concentration of large-scale power loads located in the metropolitan areas have resulted in high fault current levels during a fault thereby requiring the substation to operate in the double busbar configuration mode. However, the double busbar configuration mode results in deterioration of power system reliability and unbalanced power flow in the adjacent transmission lines which may result in issues such as overloading of lines. This paper proposes the implementation of the superconducting fault current limiter (SFCL) to be installed between the two substation busbars for a more efficient and flexible operation of the substation enabling both single and double busbar configurations depending on the system conditions for guaranteeing power system reliability as well as fault current limitations. Case studies are being performed for the effectiveness of the SFCL installation and results are compared for the cases where the substation is operating in single and double busbar mode and with and without the installation of the SFCL for fault current mitigation.

  7. Application of service oriented architecture for sensors and actuators in district heating substations.

    Science.gov (United States)

    Gustafsson, Jonas; Kyusakov, Rumen; Mäkitaavola, Henrik; Delsing, Jerker

    2014-08-21

    Hardwired sensor installations using proprietary protocols found in today's district heating substations limit the potential usability of the sensors in and around the substations. If sensor resources can be shared and re-used in a variety of applications, the cost of sensors and installation can be reduced, and their functionality and operability can be increased. In this paper, we present a new concept of district heating substation control and monitoring, where a service oriented architecture (SOA) is deployed in a wireless sensor network (WSN), which is integrated with the substation. IP-networking is exclusively used from sensor to server; hence, no middleware is needed for Internet integration. Further, by enabling thousands of sensors with SOA capabilities, a System of Systems approach can be applied. The results of this paper show that it is possible to utilize SOA solutions with heavily resource-constrained embedded devices in contexts where the real-time constrains are limited, such as in a district heating substation.

  8. Characteristic Analysis of DC Electric Railway Systems with Superconducting Power Cables Connecting Power Substations

    Science.gov (United States)

    Ohsaki, H.; Matsushita, N.; Koseki, T.; Tomita, M.

    2014-05-01

    The application of superconducting power cables to DC electric railway systems has been studied. It could leads to an effective use of regenerative brake, improved energy efficiency, effective load sharing among the substations, etc. In this study, an electric circuit model of a DC feeding system is built and numerical simulation is carried out using MATLAB-Simulink software. A modified electric circuit model with an AC power grid connection taken into account is also created to simulate the influence of the grid connection. The analyses have proved that a certain amount of energy can be conserved by introducing superconducting cables, and that electric load distribution and concentration among the substations depend on the substation output voltage distribution.

  9. Accurately Localize and Recognize Instruments with Substation Inspection Robot in Complex Environments

    Directory of Open Access Journals (Sweden)

    Hui Song

    2014-07-01

    Full Text Available This paper designs and develops an automatic detection system in the substation environment where complex and multi-inspecting objects exist. The inspection robot is able to fix and identify the objects quickly using a visual servo control system. This paper focuses on the analysis of fast lockup and recognition method of the substation instruments based on an improved Adaboost algorithm. The robot adjusts its position to the best view point and best resolution for the instrument in real-time. The dial and pointer of the instruments are detected with an improved Hough algorithm, and the angle of the pointer is converted to the corresponding readings. The experimental results indicate that the inspection robot can fix and identify the substation instruments quickly, and has a wide range of practical applications.

  10. Wiener Stadtwerke-Elektrizitaetswerke's 380 KV south substation; overvoltages and insulation coordination

    Energy Technology Data Exchange (ETDEWEB)

    Schilling, K.; Voelcker, O.

    Expected loads from transient overvoltages were calculated for the 380 KV switchgear of the South substation. The values so obtained formed the basis for the use of lightning arresters and the selection of insulation levels. Subjects of special investigation were overvoltages resulting from short-circuit earth currents as a function of the amount of transformer neutral point earthing; the risk, when transformers are connected, of temporary overvoltages as a result of resonance excitation, with allowance being made for the relatively large capacity of the cable network; voltage when the link towards the South-east substation (completely overhead and partly underground alternatives) is connected; protection of the substation in the case of lightnings striking overhead systems.

  11. Electric and magnetic field testing in vicinity of 110/x kV substations

    Directory of Open Access Journals (Sweden)

    Grbić Maja

    2016-01-01

    Full Text Available The levels of non-ionizing radiation (electric and magnetic fields at power frequency, which occur near 110/x kV substations are analyzed in this paper. The results of electric field strength and magnetic flux density measurements in the vicinity of three typical substations of the aforementioned voltage level are shown. With the purpose of estimating the exposure of the population to these fields, the obtained results were compared to the reference maximum levels set for increased sensitivity areas, which amount to 2 kV/m for electric field and 40 μT for magnetic flux density. The objective of the conducted analysis is to reach general conclusions on the levels of electric and magnetic fields, which may occur in the vicinity of the substations mentioned above, and evaluate their compliance with the national regulations on the population protection from non-ionizing radiation.

  12. [Offshore substation workers' exposure to harmful factors - Actions minimizing risk of hazards].

    Science.gov (United States)

    Piotrowski, Paweł Janusz; Robak, Sylwester; Polewaczyk, Mateusz Maksymilian; Raczkowski, Robert

    2016-01-01

    The current development of electric power industry in Poland, especially in the field of renewable energy sources, including wind power, brings about the need to introduce legislation on new work environment. The development of occupational safety and health (OSH) regulations that must be met by new workplaces, such as offshore substations becomes necessary in view of the construction of modern offshore wind power plants - offshore wind farms. Staying on offshore substation is associated with an increased exposure to harmful health factors: physical, chemical, biological and psychophysical. The main sources of health risks on offshore substations are: temperature, electromagnetic field, noise from operating wind turbines, direct and alternating current, chemicals, Legionella bacteria and social isolation of people. The aim of this article is to draw attention to the problem of offshore substation workers' exposure to harmful factors and to present methods of preventing and reducing the risk-related adverse health effects. In this paper, there are identified and described risks occurring on offshore substations (fire, explosion, lightning, accidents at work). Some examples of the means and the methods for reducing the negative impact of exposure on the human health are presented and discussed. The article also highlights the need to develop appropriate laws and health and safety regulations concerning the new working environment at the offshore substations. The review of researches and international standards shows that some of them can be introduced into the Polish labor market. This work is available in Open Access model and licensed under a CC BY-NC 3.0 PL license.

  13. Determination of exposure to electric fields in extra high voltage substations.

    Science.gov (United States)

    Lövstrand, K G

    1976-09-01

    Electrophysical effects related to extra high voltage are surveyed for the determination of the exposure of personnel to electric fields in substations. It is concluded that the electric field strengths and the electrical discharges to the personnel are the important electrophysical factors. Instruments for measuring the field strength at grounded surfaces and at nonzero potentials were constructed. Results are presented of measurements with these instruments in substations. A dummy was used for the measurement of the distribution of capacitive currents to a man. The dummy can also be used for measuring the effectiveness of special shielding clothes.

  14. Automated system for load flow prediction in power substations using artificial neural networks

    Directory of Open Access Journals (Sweden)

    Arlys Michel Lastre Aleaga

    2015-09-01

    Full Text Available The load flow is of great importance in assisting the process of decision making and planning of generation, distribution and transmission of electricity. Ignorance of the values in this indicator, as well as their inappropriate prediction, difficult decision making and efficiency of the electricity service, and can cause undesirable situations such as; the on demand, overheating of the components that make up a substation, and incorrect planning processes electricity generation and distribution. Given the need for prediction of flow of electric charge of the substations in Ecuador this research proposes the concept for the development of an automated prediction system employing the use of Artificial Neural Networks.

  15. Comparisons process-to-bay level peer-to-peer network delay in IEC 61850 substation communication systems

    Directory of Open Access Journals (Sweden)

    Nasser Hasan Ali

    2014-12-01

    Full Text Available This paper presents the application of IEC 61850 protocol in electrical power engineering industry for data communication systems between substations. This IEC 61850 protocol presents new challenges for real-time communication performance between Intelligent Electronic Devices (IEDs within substation because of the Generic Object Oriented Substation Event (GOOSE messages. The analyses of substation Ethernet and WLAN (wireless LAN communication delay, its impact factors, various methods and different network topologies which can improve the real-time performance are discussed. For basic analysis of data flow within a substation, the Optimized Network Engineering Tool (OPNET software is used. The process-to-bay level network simulation model is performed by using the OPNET software. The Ethernet delay and WLAN peer-to-peer performance of the process-to-bay level network simulation results are analyzed which is based on AP (access point, switched, shared Ethernet network or peer-to-peer network.

  16. ¿Discapacidad o diversidad funcional?

    Directory of Open Access Journals (Sweden)

    Joan CANIMAS BRUGUÉ

    2015-12-01

    Full Text Available Hasta hoy disponemos de tres paradigmas para pensar lo que aún llamamos discapacidad: el médico, el social y el biopsicosocial (que ha intentado integrar y superar la confrontación entre los dos primeros. El Foro de Vida Independiente (FVI y los autores y activistas que ayudan a profundizar y a extender sus propuestas celebran el avance que ha supuesto el paradigma biopsicosocial, pero no lo comparten y proponen un nuevo modelo que llaman de la diversidad funcional, una versión hermenéutica del paradigma social. Este artículo intenta identificar los problemas que el modelo de la diversidad funcional plantea a la ética aplicada, y se centra en dos de ellos. El primero es: si lo que ahora consideramos deficiencia es interpretado únicamente como diversidad, ¿qué argumentos tendríamos para no respetar la decisión de unos padres de no corregir una deficiencia física, intelectual o del desarrollo de sus hijos, pudiéndolo hacer con una terapia eficaz, razonable y sin riesgos? ¿Y para impedir que les produzcan una deficiencia? El segundo problema es: ¿Cómo justificar la necesidad de discriminación positiva (más recursos y atenciones y más investigación médica y tecnológica a las personas con diversidad funcional e incluso de apoyo, si se considera que su manera de funcionar no es ni mejor ni peor que las otras?

  17. Novas drogas no tratamento da dispepsia funcional

    Directory of Open Access Journals (Sweden)

    TRONCON Luiz Ernesto de Almeida

    2001-01-01

    Full Text Available Racional - A dispepsia funcional caracteriza-se pela ocorrência de sintomas digestivos altos, na ausência de qualquer evidência de doença orgânica ou anormalidade estrutural. O tratamento farmacológico atual desta condição é feito empiricamente com agentes anti-secretores ou drogas pró-cinéticas. Objetivos - Rever os avanços recentes nos conhecimentos sobre os mecanismos responsáveis pelo aparecimento dos sintomas, bem como o desenvolvimento de novas drogas capazes de interferir nestes mecanismos, que abrem a perspectiva de tratamento farmacológico mais racional e efetivo da dispepsia funcional. Método - Revisão sistemática do trabalhos publicados em língua inglesa, nos últimos 10 anos. Resultados - Novas drogas que aumentam a propulsão gastroduodenal incluem: derivados benzamídicos análogos da cisaprida, antagonistas dos receptores A da colecistocinina, agonistas de receptores opióides e uma nova classe de agonistas da motilina, semelhantes à eritromicina. Drogas agonistas dos receptores serotoninérgicos do plexo mioentérico, como o sumatriptano e a buspirona, podem aumentar a capacidade de acomodação do bolo alimentar. Por fim, novas drogas, de grupos farmacológicos diversos, estão sendo avaliadas quanto a sua capacidade de reduzir ou modificar a percepção sensorial visceral. Inclui este grupo a octreotida, a loxiglumida, o ondansetron e seus análogos, a fedotozina e os anti-depressivos tricíclicos, em doses baixas. Conclusões - Ainda que as novas drogas apresentem alto potencial de aperfeiçoar o tratamento da dispepsia funcional, há a necessidade de ensaios controlados, com número adequado de pacientes, para se comprovar a eficácia desses medicamentos. Além disso, as dificuldades em determinar o mecanismo subjacente aos sintomas pode limitar o impacto positivo das novas drogas no tratamento da dispepsia funcional.

  18. Funciones sociales del consumo: un caso extremo

    Directory of Open Access Journals (Sweden)

    JOSÉ CASTILLO CASTILLO

    1994-01-01

    Full Text Available El consumo religioso de reliquías de santos durante la edad media cumple semejantes funciones sociales para su época que el consumo economico de objetos para la nuestra: El de reforzar real y simbólicamente las estructuras de prestigio, riqueza y poder de sus respectivas sociedades. El ámbito de la sociología del consumo no se circunscribe a los estrechos límites de las llamadas sociedades de consumo de masas. en el presente caso, el estudio del pasado ilumina procesos sociales propios de nuestros días.

  19. Planejamento integrado de recursos hidroenergeticos : o confronto de usos multiplos da agua no aproveitamento hidroeletrico de Alqueva em Portugal

    OpenAIRE

    Frederico Fabio Mauad

    2000-01-01

    Resumo: O fornecimento de energia elétrica e a disponibilidade de água são dois requisitos fundamentais para que uma região se desenvolva adequadamente. Portanto, é conveniente que um aproveitamento hidroelétrico considere a utilização da água para outras finalidades além da geração de energia elétrica. A cada dia cresce a disputa entre os vários usuários da água (agricultura, indústria, energia e abastecimento humano) que competem pelo uso deste recurso hídrico, gerando sérios conflitos. Uma...

  20. Competencias laborales del auditor de servicios de salud: un analisis funcional Venezuela, 2008

    National Research Council Canada - National Science Library

    Chirinos-Munoz, Monica S

    2010-01-01

    .... Discusion Este mapa funcional refleja de forma detallada las funciones simples y complejas que un auditor de servicios de salud segun la metodologia del analisis funcional deberia aplicar en el campo...

  1. An Auto Tuning Substation Peak Shaving Controller for Congestion Management Using Flexible Demand

    DEFF Research Database (Denmark)

    Sossan, Fabrizio; Marinelli, Mattia

    2013-01-01

    A closed loop substation peak shaving/congestion management controller for radial distribution networks is presented. The controller it uses an individual control signal in order to shift the consumption of a population of demand side resources, DSRs. The controller auto tunes its parameters on...

  2. [Risk of electromagnetic fields in electric power stations and substations of a petrochemical plant].

    Science.gov (United States)

    Castagnoli, A; Fabri, G; Romeo, A

    2003-01-01

    Authors evaluate electromagnetic field exposure in the low-frequency range (5-30,000 Hz) in electric power stations and substations of petroleum processing plant. According to the measured values and the reference exposure limits considered, they conclude that operators should be exposed without adverse effects.

  3. Procedures and criteria for increasing the earthquake resistance level of electrical substations and special installations

    Energy Technology Data Exchange (ETDEWEB)

    Couch, R.W.; Deacon, R.J.

    1973-09-30

    This report defines a procedure and provides basic information needed to determine the modifications required to make electrical substations and special installations of the Bonneville Power Administration (BPA) more resistant to strong earthquake ground motion. It also provides a procedure for developing an effective plan for establishing the sequence, or priority, of providing the required modifications.

  4. Man-entry grid and power substations in Germany; Begehbare Netz- und Uebergabestationen in Deutschland

    Energy Technology Data Exchange (ETDEWEB)

    Primus, Illo-Frank

    2010-11-15

    Since the first publication of an electrotechnical standard for factory-assembled stations in 1997, grid and power substations in Germany as a rule are not constructed on site - with some exceptions, e.g. large-scale switching stations - but as prefabricated, factory-assembled concrete structures. There are two types of stations depending on the producer.

  5. optimization design of ground grid mesh of 132/33kv substation

    African Journals Online (AJOL)

    user

    design analysis using IEEE and Finite Element Analysis (FEM) methods. The two methods are used differently to determine the ground grid mesh parameters, step & touch voltages, horizontal and vertical number of conductors, vertical numbers of rods, and final substation Resistance. Etap 12.60 software is used for the ...

  6. The Assessment of Working Conditions of Traction Substation for Power and Reactive Energy

    Directory of Open Access Journals (Sweden)

    Zbigniew Lukasik

    2008-01-01

    Full Text Available In this paper, problems concerning the management of reactive power of DC traction substation have been discussed. The structure of traction system and its main elements has been sketched. Reactive power issue with respect to rectifier sets has been presented. The case of generating reactive power of capacitive character in the traction supplying systemand taken precautions has been also described.

  7. Entrenamiento Cognitivo de las Funciones Ejecutivas en la Edad Escolar

    Directory of Open Access Journals (Sweden)

    María Luisa Betancur-Caro

    2016-02-01

    Full Text Available En este artículo nuestro objetivo es evaluar y analizar el Rendimiento Académico de un niño en edad escolar a partir de un programa de entrenamiento cognitivo de las Funciones Ejecutivas. Realizamos el estudio de caso en tres momentos: evaluación inicial pretest con subpruebas de la Banfe y la ENI; identificamos el estado de las funciones ejecutivas, el entrenamiento cognitivo del Control Inhibitorio, la Fluidez y la Planeación, y la evaluación final postest con el mismo repertorio de la evaluación inicial, a fin de identificar los logros del entrenamiento cognitivo sobre las funciones ejecutivas y el rendimiento académico. Resultados y conclusiones: El entrenamiento cognitivo favoreció las funciones ejecutivas estimuladas; sin embargo, no logramos demostrar una relación concluyente entre las funciones ejecutivas y el rendimiento académico.

  8. Entrenamiento Cognitivo de las Funciones Ejecutivas en la Edad Escolar

    Directory of Open Access Journals (Sweden)

    María Luisa Betancur-Caro

    2016-01-01

    Full Text Available En este artículo nuestro objetivo es evaluar y analizar el Rendimiento Académico de un niño en edad escolar a partir de un programa de entrenamiento cognitivo de las Funciones Ejecutivas. Realizamos el estudio de caso en tres momentos: evaluación inicial pretest con subpruebas de la Banfe y la ENI; identificamos el estado de las funciones ejecutivas, el entrenamiento cognitivo del Control Inhibitorio, la Fluidez y la Planeación, y la evaluación final postest con el mismo repertorio de la evaluación inicial, a fin de identificar los logros del entrenamiento cognitivo sobre las funciones ejecutivas y el rendimiento académico. Resultados y conclusiones: El entrenamiento cognitivo favoreció las funciones ejecutivas estimuladas; sin embargo, no logramos demostrar una relación concluyente entre las funciones ejecutivas y el rendimiento académico.

  9. Predictive Maintenance of Power Substation Equipment by Infrared Thermography Using a Machine-Learning Approach

    Directory of Open Access Journals (Sweden)

    Irfan Ullah

    2017-12-01

    Full Text Available A variety of reasons, specifically contact issues, irregular loads, cracks in insulation, defective relays, terminal junctions and other similar issues, increase the internal temperature of electrical instruments. This results in unexpected disturbances and potential damage to power equipment. Therefore, the initial prevention measures of thermal anomalies in electrical tools are essential to prevent power-equipment failure. In this article, we address this initial prevention mechanism for power substations using a computer-vision approach by taking advantage of infrared thermal images. The thermal images are taken through infrared cameras without disturbing the working operations of power substations. Thus, this article augments the non-destructive approach to defect analysis in electrical power equipment using computer vision and machine learning. We use a total of 150 thermal pictures of different electrical equipment in 10 different substations in operating conditions, using 300 different hotspots. Our approach uses multi-layered perceptron (MLP to classify the thermal conditions of components of power substations into “defect” and “non-defect” classes. A total of eleven features, which are first-order and second-order statistical features, are calculated from the thermal sample images. The performance of MLP shows initial accuracy of 79.78%. We further augment the MLP with graph cut to increase accuracy to 84%. We argue that with the successful development and deployment of this new system, the Technology Department of Chongqing can arrange the recommended actions and thus save cost in repair and outages. This can play an important role in the quick and reliable inspection to potentially prevent power substation equipment from failure, which will save the whole system from breakdown. The increased 84% accuracy with the integration of the graph cut shows the efficacy of the proposed defect analysis approach.

  10. Automatic extraction of insulators from 3D LiDAR data of an electrical substation

    Directory of Open Access Journals (Sweden)

    M. Arastounia

    2013-10-01

    Full Text Available A considerable percentage of power outages are caused by animals that come into contact with conductive elements of electrical substations. These can be prevented by insulating conductive electrical objects, for which a 3D as-built plan of the substation is crucial. This research aims to create such a 3D as-built plan using terrestrial LiDAR data while in this paper the aim is to extract insulators, which are key objects in electrical substations. This paper proposes a segmentation method based on a new approach of finding the principle direction of points’ distribution. This is done by forming and analysing the distribution matrix whose elements are the range of points in 9 different directions in 3D space. Comparison of the computational performance of our method with PCA (principal component analysis shows that our approach is 25% faster since it utilizes zero-order moments while PCA computes the first- and second-order moments, which is more time-consuming. A knowledge-based approach has been developed to automatically recognize points on insulators. The method utilizes known insulator properties such as diameter and the number and the spacing of their rings. The results achieved indicate that 24 out of 27 insulators could be recognized while the 3 un-recognized ones were highly occluded. Check point analysis was performed by manually cropping all points on insulators. The results of check point analysis show that the accuracy, precision and recall of insulator recognition are 98%, 86% and 81%, respectively. It is concluded that automatic object extraction from electrical substations using only LiDAR data is not only possible but also promising. Moreover, our developed approach to determine the directional distribution of points is computationally more efficient for segmentation of objects in electrical substations compared to PCA. Finally our knowledge-based method is promising to recognize points on electrical objects as it was

  11. Fatores determinantes da capacidade funcional entre idosos

    Directory of Open Access Journals (Sweden)

    Rosa Tereza Etsuko da Costa

    2003-01-01

    Full Text Available OBJETIVO; Investigar a influência de fatores socioeconômicos e demográficos relativos à saúde, bem como os fatores ligados às atividades sociais e à avaliação subjetiva da saúde sobre a capacidade funcional dos idosos. MÉTODOS: Estudo transversal, integrante de estudo multicêntrico, em amostra representativa do município de São Paulo, realizado em 1989. A capacidade funcional foi avaliada através da escala de atividades da vida diária pessoal e instrumental e investigada como variável dicotômica: ausência de dependência - incapacidade/dificuldade em nenhuma das atividades versus presença de dependência moderada/grave - incapacidade/dificuldade em 4 ou mais atividades. Análise de regressão logística múltipla foi aplicada aos fatores hierarquicamente agrupados. RESULTADOS: As características que se associaram com a dependência moderada/grave foram analfabetismo, ser aposentado, ser pensionista, ser dona de casa, não ser proprietário da moradia, ter mais de 65 anos, ter composição familiar multigeracional, ter sido internado nos últimos 6 meses, ser "caso" no rastreamento de saúde mental, não visitar amigos, ter problemas de visão, ter história de derrame, não visitar parentes e ter avaliação pessimista da saúde ao se comparar com seus pares. CONCLUSÕES: As características identificadas que se associaram à dependência moderada/grave sugerem uma complexa rede causal do declínio da capacidade funcional. Pode-se supor, entretanto, que ações preventivas especificamente voltadas para certos fatores podem propiciar benefícios para o prolongamento do bem estar da população idosa.

  12. Electric Substations, Electric substation locations provided to us from Kansas City Power and Light and City of Gardner only at this time. AIMS is working on getting other providers in area. Data is limited to CUE (Collaborative Utility Exchange) Participants and subcontracto, Published in 2004, Johnson County Government.

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — Electric Substations dataset current as of 2004. Electric substation locations provided to us from Kansas City Power and Light and City of Gardner only at this time....

  13. Estudo da viabilidade do aproveitamento de água de chuva para consumo não potável em edificações.

    OpenAIRE

    Simone May

    2004-01-01

    Para a conservação de água existem medidas convencionais e medidas não convencionais. O sistema de aproveitamento de água da chuva para consumo não potável é uma medida não convencional. Atualmente o aproveitamento de água da chuva é praticado em países como Estados Unidos, Alemanha, Japão, entre outros. No Brasil, o sistema é utilizado em algumas cidades do Nordeste como fonte de suprimento de água. A viabilidade do uso de água da chuva é caracterizada pela diminuição na demanda de água forn...

  14. Funciones de la indumentaria en la picaresca

    OpenAIRE

    Barrio Olano, José Ignacio

    2011-01-01

    Resulta aventurado añadir algo más sobre las funciones de la indumentaria en la picaresca después de las excelentes investigaciones de Encarnación Juárez Almendros sobre la importancia del vestido en las narrativas autobiográficas del Siglo de Oro y también de Carmen Bernís sobre la historia de la indumentaria española1. Encarnación Juárez recoge los distintos postulados teóricos para el estudio de la indumentaria: la teoría de la imitación, por cuanto que con frecuencia el ves...

  15. ANÁLISE ECONÔMICO-FINANCEIRA DO APROVEITAMENTO ENERGÉTICO DO GÁS METANO PROVENIENTE DE INSTALAÇÃO DE SUINOCULTURA

    Directory of Open Access Journals (Sweden)

    Juciara Oliveira Lopes

    2017-01-01

    Full Text Available O presente trabalho objetivou analisar de maneira econômico-financeira o aproveitamento energético do gás metano proveniente das instalações da suinocultura do IFNMG, Campus Januária. Para isso, foram avaliadas duas situações diferentes: o aproveitamento do biogás a partir do biodigestor já instalado e uma segunda situação para analisar desde a instalação do biodigestor ao aproveitamento do biogás. No cenário de 10 anos foram obtidos, na situação 1 payback de 4,46 anos, VPL de R$ 38.209,42, e o TIR de 19%, e na situação 2 payback de 1,10 anos, VPL de R$ 82.698,00 e TIR de 86%. Representando assim, um investimento atraente para a instituição e possivelmente para produtores rurais no Norte de Minas Gerais, com produção suinícola similares a este estudo.

  16. Improving the performance of subtransmission through substation reinforcement; Melhoria do desempenho de sistemas de subtransmissao atraves de reforcos em substacoes

    Energy Technology Data Exchange (ETDEWEB)

    Paiva Mendes, Dilcemar de [Ceara Univ., Fortaleza, CE (Brazil); Melo, Albert Cordeiro Geber de [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil); Pereira, Jose Luiz Rezende [Juiz de Fora Univ., MG (Brazil)

    1994-12-31

    This work presents an approach to the global reliability improve of power subtransmission systems through of reinforcements in critical components of the power substations. (author) 13 refs., 3 figs., 3 tabs.

  17. 3D Modeling of Transformer Substation Based on Mapping and 2D Images

    Directory of Open Access Journals (Sweden)

    Lei Sun

    2016-01-01

    Full Text Available A new method for building 3D models of transformer substation based on mapping and 2D images is proposed in this paper. This method segments objects of equipment in 2D images by using k-means algorithm in determining the cluster centers dynamically to segment different shapes and then extracts feature parameters from the divided objects by using FFT and retrieves the similar objects from 3D databases and then builds 3D models by computing the mapping data. The method proposed in this paper can avoid the complex data collection and big workload by using 3D laser scanner. The example analysis shows the method can build coarse 3D models efficiently which can meet the requirements for hazardous area classification and constructions representations of transformer substation.

  18. Study of HF behaviour of railway power substation in reduced scale

    Science.gov (United States)

    Ouaddi, H.; Baranowski, S.; Nottet, G.; Demoulin, B.; Koné, L.

    2011-03-01

    The study presented in this paper is a first step of an EMC (Electromagnetic Compatibility) analysis of the behaviour of a railway power substation at high frequency. Before on site intensive experimentation, the approach is performed with a reduced scale model. The mock-up of the substation is powered by a 220 V three-phase voltage supplied by a 15 kV A power transformer, a rectifier and loads. The study consists in designing an equivalent electrical circuit of power transformer in high frequency, available over a large panel of loads. The model of power transformer was deduced from measurements in frequency domain within the range 40 Hz to 30 MHz.

  19. Energy saving in the operation of industrial electrical substations. Part I. Studies

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Jimenez, Juan J; Zerquera Izquierdo, Mariano D; Beltran Leon, Jose S; Garcia Martinez, Juan M; Alvarez Urena, Maria V; Meza Diaz, Guillermo [Universidad de Guadalajara (Mexico)]. E-mails: cheosj@yahoo.com; mdzi@hotmail.com; beltran5601@yahoo.com.mx; jmargarmtz@yahoo.com; victory_alvarez@telmexmail.com; depmec@cucei.udg.mx

    2013-03-15

    The main objective of this work is to offer a methodology for the operation of substations composed by two or more transformers that feed loads of first category. Understand by loads of first category those in that the interruption of the electric supply may cause the loss of human life. The core of this operation shows that in substations with several transformers, the number of transformers connected at a given moment should be one that avoids losses. [Spanish] El objetivo principal de este trabajo es ofrecer una metodologia para la operacion de subestaciones compuestas por dos o mas transformadores que alimentan cargas de primera categoria. Entendiendose por cargas de primera categoria, aquellas en que la interrupcion del suministro electrico puede causar la perdida de vidas humanas. El nucleo de esta operacion muestra que en las subestaciones con varios transformadores, el numero de transformadores conectados, en un momento dado, debe ser aquel que evite perdidas.

  20. Autonomous navigation method for substation inspection robot based on travelling deviation

    Science.gov (United States)

    Yang, Guoqing; Xu, Wei; Li, Jian; Fu, Chongguang; Zhou, Hao; Zhang, Chuanyou; Shao, Guangting

    2017-06-01

    A new method of edge detection is proposed in substation environment, which can realize the autonomous navigation of the substation inspection robot. First of all, the road image and information are obtained by using an image acquisition device. Secondly, the noise in the region of interest which is selected in the road image, is removed with the digital image processing algorithm, the road edge is extracted by Canny operator, and the road boundaries are extracted by Hough transform. Finally, the distance between the robot and the left and the right boundaries is calculated, and the travelling distance is obtained. The robot's walking route is controlled according to the travel deviation and the preset threshold. Experimental results show that the proposed method can detect the road area in real time, and the algorithm has high accuracy and stable performance.

  1. Avaliação de um sistema de cavaqueamento de ponteiras de eucalipto para aproveitamento energético

    Directory of Open Access Journals (Sweden)

    Juliana Lorensi do Canto

    2011-12-01

    Full Text Available Os objetivos deste trabalho foram avaliar o desempenho e estimar os custos de um sistema de cavaqueamento de ponteiras de eucalipto, resultantes de colheita florestal, para aproveitamento energético em uma empresa de base florestal localizada no Estado do Pará, na Região Norte do Brasil. O sistema era composto por um picador florestal, dois tratores florestais transportadores autocarregáveis (com grua e uma carregadora frontal. A coleta de dados baseou-se em estudo de tempos e movimentos, determinação do consumo de combustível e pesagem dos cavacos produzidos. A produtividade média do sistema foi de 17,51 toneladas por hora efetiva. A eficiência operacional foi de 51,9%, devido a diversas demoras operacionais, principalmente para conserto e manutenção do picador. O transporte de cavacos foi considerado o ponto de estrangulamento do sistema, devido a ocorrências de falta de caminhão disponível no local para o carregamento. O sistema pode produzir entre 94 e 162 vezes mais energia do que consome. O custo do sistema por hora efetiva foi de R$376,56, o que representa R$21,51/t de cavacos ou R$2,70/GJ.

  2. O aproveitamento do resíduo da indústria do sisal no controle de larvas de mosquitos

    Directory of Open Access Journals (Sweden)

    Pizarro Ana Paula B.

    1999-01-01

    Full Text Available Descreve-se o aproveitamento do resíduo do desfibramento das folhas de Agave sisalana, como um larvicida para o combate a mosquitos transmissores de doenças tropicais. Durante 24 horas, larvas de Aedes aegypti e Culex quinquefasciatus foram expostas a concentrações diferentes do extrato da planta para determinar as concentrações letais. Para A. aegypti foi constatada a CL50 em 322ppm e para C. quinquefasciatus em 183ppm. Foi investigada a ação de saponinas existentes na planta, ficando evidenciado que o resíduo de A. sisalana é ativo através da interação de vários dos seus componentes. Este extrato poderá ser utilizado em campo, na concentração de 100ppm para C. quinquefasciatus com um aumento do tempo de exposição para três dias, obtendo-se uma mortalidade de 100% das larvas. Este produto, porém, não é recomendado para o controle de A. aegypti, devido à necessidade de uma alta concentração para a obtenção de 100% de mortalidade das larvas e ao fato destas se desenvolverem preferencialmente em água potável.

  3. Funcion renal, estado de volemia y furosemida en dialisis peritoneal

    National Research Council Canada - National Science Library

    Cirera Segura, Francisco; Martin Espejo, Jesus Lucas; Gomez Castilla, Antonia Concepcion; Ojeda Guerrero, Maria Angeles

    2013-01-01

    .... Ningun paciente presento efectos secundarios. La administracion de dosis bajas de diureticos no ha mostrado diferencias significativas para la diuresis y la funcion renal durante el primer ano en dialisis peritoneal...

  4. Integrated information systems; protection, substation control, network management - Available solutions on the market

    Energy Technology Data Exchange (ETDEWEB)

    Oedmansson, E.; Oehlen, C. [ABB TNP International, Vaesteraas, (Sweden)

    1995-11-01

    Many utilities sees the use of Information Technology as a main tool to meet requirements of improved cost efficiency of their transmission and distribution networks. They need to reduce both investments and operational costs. One of the possibilities is the vertical integration of Protection, Substation Control and Network management as well as the necessary communication links. This paper describes the evolution of the new technology and how this today offers new solutions for `The Intelligent Power System`. 6 refs, 4 figs

  5. Change We Can Fight Over: The Relationship between Arable Land Supply and Substate Conflict

    Science.gov (United States)

    2010-01-01

    Change We Can Fight Over: The Relationship between Arable Land Supply and Substate Conflict Nathan Black Introduction...valid OMB control number. 1. REPORT DATE 2010 2. REPORT TYPE 3. DATES COVERED 00-00-2010 to 00-00-2010 4. TITLE AND SUBTITLE Change We Can Fight...as discussed in the conclusion, but we can safely state that both humans and nature play a role. This article only argues that if arable land

  6. A new test procedure to evaluate the performance of substations for collective heating systems

    Science.gov (United States)

    Baetens, Robin; Verhaert, Ivan

    2017-11-01

    The overall heat demand of a single dwelling, existing out of space heating and domestic hot water production, decreases due to higher insulation rates. Because of this, investing in efficient and renewable heat generation becomes less interesting. Therefore, to incorporate renewables or residual heat on a larger scale, district heating or collective heating systems grow in importance. Within this set-up, the substation is responsible for the interaction between local demand for comfort and overall energy performance of the collective heating system. Many different configurations of substations exist, which influence both local comfort and central system performance. Next to that, also hybrids exist with additional local energy input. To evaluate performance of such substations, a new experimental-based test procedure is developed in order to evaluate these different aspects, characterized by the two roles a substation has, namely as heat generator and as heat consumer. The advantage of this approach is that an objective comparison between individual and central systems regarding performance on delivering local comfort can be executed experimentally. The lab set-up consists out of three different subsystems, namely the central system, the domestic hot water consumption and the local space heating. The central system can work with different temperature regimes and control strategies, as these aspects have proven to have the largest influence on actual performance. The domestic hot water system is able to generate similar tap profiles according to eco-design regulation for domestic hot water generation. The space heating system is able to demand a modular heat load.

  7. Investigation of Leakage Current Waveforms Recorded in a Coastal High Voltage Substation

    OpenAIRE

    E. Thalassinakis; Pyrgioti, E.; K. Siderakis; D. Pylarinos; I. Vitellas

    2011-01-01

    Leakage current monitoring is a widely employed technique to monitor the performance of outdoor insulation. The evaluation of leakage current waveforms recorded in the field, offers significant information since insulation’s performance is strongly linked with local conditions, and the waveforms’ shape correlate to different types of surface activity. In this paper, an investigation of leakage current waveforms recorded in a 150 kV coastal Substations suffering which suffers inten...

  8. Marys Lake 69/115-kV transmission line upgrade and substation expansion projects

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-05-01

    Western Area Power Administration (Western) and the Platte River Power Authority (Platte River) propose to upgrade portions of the existing electric transmission and substation system that serves the Town of Estes Park, Colorado. The existing transmission lines between the Estes Power Plant Switchyard and the Marys Lake Substation include a 115,000 volt (115-kV) line and 69,000 volt (69-kV) line. Approximately one mile is a double-circuit 115/69-kV line on steel lattice structures, and approximately two miles consists of separate single-circuit 115-kV and a 69-kV lines, constructed on wood H-Frame structures. Both lines were constructed in 1951 by the US Bureau of Reclamation. The existing transmission lines are on rights-of-way (ROW) that vary from 75 feet to 120 feet and are owned by Western. There are 48 landowners adjacent to the existing ROW. All of the houses were built adjacent to the existing ROW after the transmission lines were constructed. Upgrading the existing 69-kV transmission line between the Marys Lake Substation and the Estes Power Plant Switchyard to 115-kV and expanding the Marys Lake Substation was identified as the most effective way in which to improve electric service to Estes Park. The primary purpose and need of the proposed project is to improve the reliability of electric service to the Town of Estes Park. Lack of reliability has been a historical concern, and reliability will always be less than desired until physical improvements are made to the electrical facilities serving Estes Park.

  9. La Gramática Discursivo-Funcional

    NARCIS (Netherlands)

    Hengeveld, K.; Mackenzie, J.L.

    2011-01-01

    La Gramática Discursivo-Funcional (GDF) es una teoría funcional del lenguaje de inspiración tipológica que presenta una organización descendente (top-down) con el objeto de alcanzar la adecuación psicológica y que toma el Acto Discursivo como unidad básica de análisis para lograr la adecuación

  10. Traction Converting Substation from Viewpoint of Feeding Interlocking Plant at Czech Railwayes

    Directory of Open Access Journals (Sweden)

    Radovan Dolecek

    2004-01-01

    Full Text Available This paper presents analyses current and voltage harmonic in traction converting substation 3 kV. It researches their rise and influence to three-phase cable line 6 kV, 50 Hz that is used for feeding interlocking plant. Processing of this task is arisen from requirement practice for line Pěčky - Poříčany - Rostoklaty where happened to adverse ratio in particular transmission line of feeding system. It is meant especially about backward influence traction substation rectifier Pečky to three - phase cable line 6 kV, 50 Hz. At the determinate lenght of the cable line, when resonace frequency of circuit transformer 22 kV/6 kV and the cable line 6 kV, 50 Hz is approached frequency 550 Hz and 650 Hz (i.e. 11 and 13 harmonic are happened to socalled "annulations input reactance of this circuit". That is caused by the leakage of current resonace frequency from traction converting substation to cable line. That proceduces additional losses and deformation waveform of voltage too. This deformation can be reflected on how interlocking plant is working. 

  11. New model of inverting substation for DC traction with regenerative braking system

    Science.gov (United States)

    Omar, Abdul Malek Saidina; Samat, Ahmad Asri Abd; Isa, Siti Sarah Mat; Shamsuddin, Sarah Addyani; Jamaludin, Nur Fadhilah; Khyasudeen, Muhammad Farris

    2017-08-01

    This paper presents a power electronic devices application focus on modeling, analysis, and control of switching power converter in the inverting DC substation with regenerative braking system which is used to recycle the surplus regenerative power by feed it back to the main AC grid. The main objective of this research is to improve the switching power electronic converter of the railway inverting substation and optimize the maximum kinetic energy recovery together with minimum power losses from the railway braking system. Assess performance including efficiency and robustness will be evaluated in order to get the best solution for the design configuration. Research methodology included mathematical calculation, simulation, and detail analysis on modeling of switching power converter on inverting substation. The design stage separates to four main areas include rectification mode, regenerative mode, control inverter mode and filtering mode. The simulation result has shown that the regenerative inverter has a capability to accept a maximum recovery power on the regeneration mode. Total energy recovery has increase and power losses have decreases because inverter abilities to transfer the surplus energy back to the main AC supply. An Inverter controller with PWM Generator and PI Voltage Regulator has been designed to control voltage magnitude and frequency of the DC traction system.

  12. A Real-Time Digital Solver for Smart Substation Based on Orders

    Directory of Open Access Journals (Sweden)

    Bingda Zhang

    2017-11-01

    Full Text Available In order to expand the simulation scale of smart substation, a simulation model of the inlet-outlet line unit, as described by the 0/108 S conductance for multivalued coefficients pre-storage is presented in this paper. As a part of orders decomposition, the address conversion circuit for multivalued coefficients can reduce the computational burden of processing elements. For the convenience of the generalization of the real-time digital solver based on FPGA (FRTDS, FPGA: Field–Programmable Gate Array, the address conversion circuit for multivalued coefficients is matched with the guide word, the formation module of sampled value (SV packet, and the resolution module of generic object oriented substation event (GOOSE packet are associated with the application identification (APPID in the Ethernet frame. The address conversion circuit for multivalued coefficients, the formation module of SV packet, and the resolution module of GOOSE packet are reconstructed via the orders. A hardware-in-the-loop real-time simulation platform for smart substation is built based on the novel FRTDS. A case is given to demonstrate the simulation calculating capability and the hardware-in-the-loop ability of the novel FRTDS.

  13. La sexualidad en la discapacidad funcional

    Directory of Open Access Journals (Sweden)

    Patricia Vélez-Laguado

    2006-12-01

    Full Text Available Una realidad es que hombres y mujeres con discapacidad funcional están inmersos en las sociedades que, siendo internamente imperfectas, han establecido un modelo de perfección al que ningún miembro concreto de ellas tiene acceso, y que definen la manera de ser física, sensorial o psíquicamente y las reglas de funcionamiento social. Y esto se relaciona con las ideas de perfección y "normalidad" establecidas por un amplio sector que tiene poder y por el concepto de mayorías meramente cuantitativas. La sexualidad y la función sexual en las personas discapacitadas son aspectos no aceptados por la sociedad en general que, por el contrario, los estigmatiza, conllevando a la marginación, malos tratos, violación de los derechos sexuales y reproductivos, explotación, asignación de papeles pasivos, olvido y la creación de un sinnúmero de mitos y tabúes en torno a la salud sexual y reproductiva de ellos.

  14. Neurofisiología y funciones mentales

    Directory of Open Access Journals (Sweden)

    Carlos Moreno B.

    1994-04-01

    Full Text Available El editor de la revista Nature, al comentar una revisión sobre el estado de las neurociencias, el 15 de octubre de 1981, afirmo: "En cierto sentido, las neurociencias están en el filo de la navaja de la nueva biología. Enriquecidas por la información novedosa y fortalecidas con un desfile vertiginoso de nuevas técnicas, están comprometidas con una de las más molestas y antiguas preguntas: ¿Cómo lleva a cabo sus funciones la representación física de la mente, llamada cerebro? Pero en otro sentido, las neurociencias incluyen algunas de las investigaciones más fastidiosas. EI continuo progreso de la técnica, tan veloz como podamos imaginarlo, es con frecuencia una fuente de frustración y desilusión para los investigadores. La que está de moda este año con las neuronas, puede ser el descarte del próximo... En general, las neurociencias están en el negocio de fabricar ladrillos sin barro.

  15. Electromagnetic spectrum caused by partial discharge in air in high voltage substations; Kakushu hendensho ni okeru kichu gaibu noise ni yoru denjiha spectrum

    Energy Technology Data Exchange (ETDEWEB)

    Yamashita, H.; Kato, T.; Hayakawa, N.; Hikita, M.; Ueda, T.; Okubo, H. [Nagoya University, Nagoya (Japan)

    1995-09-20

    We have been investigating characteristics of electromagnetic spectrum for partial discharge (PD) diagnosis systems for SF6 gas insulated switch gears (GIS). We measured noise spectrum in air at three different types of high voltage substations 550 kV open-air insulation substation, 550 kV open-air GIS substation and 275 kV underground GIS substation. A biconical antenna acting in a frequency range from 30 to 300 MHz was placed at a few meter away from GIS or gas circuit breaker (GCB) in the substations. From the experimental result, we obtained the average gain Ga of electromagnetic spectrum at each frequency in the substations. Next, we discussed the relationship between Ga and atmospheric conditions using an empirical formula of PD inception electric field Ec. As a result, we found the inverse proportionality of Ga against Ec which was determined by the temperature, pressure and radius of high voltage overhead conductors. We also investigated the relationship between PD pulse and the emitted electromagnetic spectrum from fundamental experiment for a needle-plane electrode configuration. Finally, we introduced `equivalent charge: qe` for substation, and concluded that the charge magnitudes of the 550 kV open-air insulation substation were about 7 times larger than those in the open-air GIS substation. 12 refs., 11 figs., 2 tabs.

  16. Estudo da combustão direta da glicerina bruta e loira como alternativa de aproveitamento energético sustentável

    OpenAIRE

    Aymer Yeferson Maturana Cordoba

    2011-01-01

    Nesta tese investiga-se e avalia-se a combustão direta da glicerina bruta e loira, co-produto e derivado, respectivamente, do processo de fabricação do biodiesel como alternativa de aproveitamento energético sustentável. Focaliza-se especialmente nos aspectos ambiental, técnico e econômico considerando as emissões, a transferência de calor associada e os aspectos operacionais como o eixo principal do estudo. Visa aumentar o conhecimento atual a respeito e contribuir para a melhoria das perspe...

  17. Avaliação da indústria de equipamentos para aproveitamento de fontes renováveis de energia

    OpenAIRE

    Fernando Sérgio Bonanni

    1991-01-01

    O presente trabalho, incentivado pelo Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq, procurou avaliar e identificar o "estado da arte" da tecnologia industrial brasileira de equipamentos de pequeno e médio porte para aproveitamento de fontes renováveis de energia. O projeto atuou nas seguintes áreas: Pequenas Centrais Hidrelétricas (PCH), Energia Solar, Energia Eólica, Biodigestores e Equipamentos de Biogás e Gaseificadores de combustíveis sólidos (Gasogênios), não some...

  18. A qualidade do sono, o aproveitamento escolar e o stress em adolescentes que permacem em frente ao computador durante a noite

    OpenAIRE

    Gema Galgani de Mesquita Duarte

    2007-01-01

    Resumo: A qualidade do sono, o aproveitamento escolar e o stress em adolescentes que permanecem em frente ao computador durante a noite. 2007. 234p. Professor Doutor Rubens Nelson Amaral de Assis Reimão. Dissertação (Mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas, Departamento da Saúde da Criança e do Adolescente. INTRODUÇÃO: O sono representa importante papel na vida do homem, influenciando as condições físicas, psicológicas e sociais. Está intimamente ligado ao...

  19. Research on the Best Root Span of 500kV Substation Frame Based on Finite Element

    Science.gov (United States)

    Chen, Hao; Fang, Qing; Chen, Haoyuan

    2018-01-01

    A-shaped and steel tube structures have been widely applied when designing 500kV substation frame in China. While, compared with steel tube, angle steels have an advantage of easy-transporting, especially in oversea projects. However, researches on substation frame with angle steel were not enough. In order to find out the best root span of 500kV substation frame under similar engineering conditions, using the overseas project substation frame as an example, the substation frames with different root span have been detailed calculated, to find the best root span according to the cost of it. When the height of column is about 30m, the root suggestion value is 6.1m×3.1m. And then, the buckling analysis of the overall structure has been carried out by ANSYS, to find out that the weak part of the structure is in the middle of it. The structural adjustment is carried out for the weak part, including adjusting the web members and the chord members, to obtain a higher bearing capacity of the structure.

  20. Defining functional dyspepsia Definiendo la dispepsia funcional

    Directory of Open Access Journals (Sweden)

    Fermín Mearin

    2011-12-01

    other hand, it has proven very difficult to establish a clear correlation between symptoms and pathophysiological mechanisms.La dispepsia, y la dispepsia funcional, suponen un problema de salud pública muy importante. Es fundamental disponer de una buena definición de dispepsia que nos ayude a un mejor enfoque de los síntomas, toma de decisiones e indicación de tratamiento. Durante los últimos años ha habido muchos intentos de establecer una definición de dispepsia. En la mayoría de los casos el resultado no ha sido muy afortunado y han existido discrepancias claras en si los síntomas debían o no estar relacionados con la digestión, qué tipo de síntomas se debían incluir, cuál debería ser la localización anatómica de las molestias, etc. El comité de Roma III definió la dispepsia como "síntoma o conjunto de síntomas que la mayoría de médicos consideran tienen su origen en la región gastroduodenal" incluyendo los siguientes: pesadez postprandial, saciedad precoz y dolor o ardor epigástrico; se definieron dos entidades nuevas: a síntomas dispépticos inducidos por la comida (síndrome del distrés postprandial; y b dolor epigástrico (síndrome del dolor epigástrico. Esta y otras definiciones han tenido sus ventajas y sus inconvenientes. En algunos casos han sido demasiado complejas y en otras sencillas en exceso; además, frecuentemente han pecado de ser demasiado imprecisas y poco prácticas. Por otra parte, algunas (las más recientes no son fácilmente aplicables al idioma español. En una reunión de especialistas en aparato digestivo con especial interés en los trastornos funcionales digestivos se sometieron a discusión y votación los distintos aspectos de la definición de dispepsia llegando a las siguientes conclusiones. La dispepsia se define como un conjunto de síntomas, relacionados o no con la ingesta, localizados en el hemiabdomen superior, siendo estos: a molestia (como categoría de intensidad o dolor epigástrico; b pesadez

  1. Resiliência e capacidade funcional em idosos

    Directory of Open Access Journals (Sweden)

    Fernanda Bueno D`Elboux Couto

    2010-10-01

    Full Text Available O envelhecer tem sido foco de muitos estudos devido ao crescente número de idosos na população mundial, pelo gasto decorrente das doenças crônicas ou pelo número maior de idosos ativos. O fato é que os idosos estão ganhando espaço em pesquisas, mostrando facetas não questionadas anteriormente. Falar sobre a independência funcional na velhice parece ser corriqueiro, mas a interação entre aspectos psicológicos como autoeficácia, autoestima e resiliência tem sido tema de pesquisas. O objetivo deste texto é apresentar conceitos referentes à capacidade funcional em idosos e correlacioná-los aos aspectos psicológicos, principalmente ao conceito de resiliência. Ao final, propomos o conceito de resiliência físico-funcional.

  2. Visualización de funciones de dos variables

    Directory of Open Access Journals (Sweden)

    Busto Caballero, Ana Isabel

    2004-01-01

    Full Text Available Los alumnos de la licenciatura en Administración y Dirección de Empresas tienen dentro de los contenidos del programa de la asignatura “Matemáticas Empresariales I”, el estudio de las funciones de varias variables: continuidad, derivabilidad, diferenciabilidad y optimización. Este tema es complicado de visualizar con tiza y pizarra, a diferencia del mismo estudio realizado para funciones reales de variable real. El objetivo de este trabajo es presentar una metodología para llevar el ordenador a clase y visualizar las gráficas de las funciones de dos variables y sus características específicas, que faciliten la comprensión del tema por parte del alumno, y conseguir que los resultados obtenidos analíticamente tengan un aspecto gráfico e intuitivo.

  3. Coordinated Voltage Control Scheme for SEIG-Based Wind Park Utilizing Substation STATCOM and ULTC Transformer

    DEFF Research Database (Denmark)

    S. El Moursi, Mohamed; Bak-Jensen, Birgitte; Abdel-Rahman, Mansour Hassan

    2011-01-01

    and optimal tracking secondary voltage control for wind parks based on self-excited induction generators which comprise STATCOM and under-load tap changer (ULTC) substation transformers. The voltage controllers for the STATCOM and ULTC transformer are coordinated and ensure the voltage support. In steady...... of the short circuit ratio of the interconnection and the inherent communication delay between the wind park and the remote bus on the performance of the controllers and the maximum critical clearing time of fault are considered. Simulation results are presented to demonstrate the performance...

  4. Determination of Optimum Network Layout for Low-Energy District Heating Systems with Different Substation Types

    DEFF Research Database (Denmark)

    Tol, Hakan; Svendsen, Svend

    2011-01-01

    In this paper three different District Heating (DH) network types, which comprise substations with storage tank, and with instantaneous heat exchanger (each for domestic hot water production); and booster pumps installed in the beginning of each street at the latter network type, are pointed out...... temperature drop at supply in low heat demand conditions during summer months, are presented with the results of dynamic simulations, carried out in the Termis software with the input data of randomly generated heat demand of consumers in the basis of simultaneity factor effect in each pipe segment at the DH...

  5. A Fast Computational Fluid Dynamics Model for the Flow and Heat Transfer Characteristics Analysis of Indoor Substation Rooms

    Science.gov (United States)

    Xu, L. W.; Zou, A. X.

    2017-05-01

    In order to find a high efficiency, energy saving structure of the indoor substation room, a novel computational fluid dynamics method is proposed to model its flow and heat transfer characteristics. As an automatic optimization system, the efficient methods for mesh generation and numerical calculation are necessary. The mesh of the whole room including the transformer and its heat transfer fins is created using a structured mesh scheme, and a detection technology is adopted to recognize all the obstacles. In order to improve the numerical efficiency, a fast computational fluid dynamics (FFD) method is adopted to establish the three dimensional dynamic model with heat source. The comparisons between the FFD model and the experimental data show that the FFD can model the flow and heat transfer characteristics of the indoor substation efficiently. By modifying the related parameters in the model, this method can be used in the simulation of other indoor substation rooms to optimize their structure and operation.

  6. Violencia, mujer y diversidad funcional. La vulnerabilidad aumentada

    OpenAIRE

    Pie, Asun; Riu, Carme

    2014-01-01

    El artículo aborda el fenómeno de la violencia en el campo intersectorial de las mujeres con diversidad funcional. Sitúa sus causas, características y especificidades apelando a una reflexión que dé cuenta de la invisibilidad de esta situación. Finalmente, se apuntan los aportes producidos por las mismas mujeres con diversidad funcional en el marco de la asociación Mujeres No Estándares.

  7. Funciones que alcanzan su norma: operadores lineales, multilineales y polinomios

    OpenAIRE

    Mazzitelli, Martín Diego

    2015-01-01

    A lo largo de esta tesis, estudiamos problemas relacionados con la densidad de funciones que alcanzan la norma. Mediante técnicas de linealización a través de productos tensoriales, obtenemos resultados del tipo Lindenstrauss, es decir, de densidad de funciones cuyas extensiones al bidual alcanzan su norma. Tratamos, además, estos problemas en el marco de ideales de operadores multilineales. Dado X un espacio de Banach cuyo dual es separable y tiene la propiedad de aproximación, probamos que ...

  8. FUNCIONES GERENCIALES DEL DIRECTOR DE LAS ESCUELAS BOLIVARIANAS

    Directory of Open Access Journals (Sweden)

    Francisco José Borjas Urribarrí

    2008-11-01

    Full Text Available El presente artículo analiza las funciones gerenciales del director de las escuelas bolivarianas de la Parroquia Alonso de Ojeda. La investigación fue descriptiva con un diseño no experimental, transversal, de campo. Una muestra conformada por 12 directivos y 84 docentes. Concluimos una inconsistencia en docentes y directivos, por cuanto no cubren las expectativas gerenciales. Se recomienda fortalecer las funciones gerenciales del Director de las Escuelas Bolivarianas.

  9. Entrenamiento Cognitivo de las Funciones Ejecutivas en la Edad Escolar

    OpenAIRE

    María Luisa Betancur-Caro; David A. Molina; Lilian Yohana Cañizales-Romaña

    2016-01-01

    En este artículo nuestro objetivo es evaluar y analizar el Rendimiento Académico de un niño en edad escolar a partir de un programa de entrenamiento cognitivo de las Funciones Ejecutivas. Realizamos el estudio de caso en tres momentos: evaluación inicial pretest con subpruebas de la Banfe y la ENI; identificamos el estado de las funciones ejecutivas, el entrenamiento cognitivo del Control Inhibitorio, la Fluidez y la Planeación, y la evaluación final postest con el mismo repertorio de la eval...

  10. EROTISMO Y SEDUCCIÓN EN MUJERES CON DIVERSIDAD FUNCIONAL

    OpenAIRE

    Senent Ramos, Marta

    2014-01-01

    Existe un 10% de la población que padece alguna diversidad funcional (Discapacidad). El 58% de estas personas son mujeres. Mujeres que con bastante frecuencia sufren una doble discriminación: tener una diversidad funcional y ser mujer. Esto las hace mucho más vulnerables a la hora de recibir cualquier tipo de abuso. Entre ellos es demasiado habitual el abuso sexual. Según estudios realizados, la ratio de mujeres con discapacidad que los sufren puede llegar a ser cinco veces mayor ...

  11. Visualización de funciones de dos variables

    OpenAIRE

    Busto Caballero, Ana Isabel

    2004-01-01

    Los alumnos de la licenciatura en Administración y Dirección de Empresas tienen dentro de los contenidos del programa de la asignatura “Matemáticas Empresariales I”, el estudio de las funciones de varias variables: continuidad, derivabilidad, diferenciabilidad y optimización. Este tema es complicado de visualizar con tiza y pizarra, a diferencia del mismo estudio realizado para funciones reales de variable real. El objetivo de este trabajo es presentar una metodología para llevar el ordenador...

  12. Avaliação da indústria de equipamentos para aproveitamento de fontes renováveis de energia

    Directory of Open Access Journals (Sweden)

    Fernando Sérgio Bonanni

    1991-12-01

    Full Text Available O presente trabalho, incentivado pelo Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq, procurou avaliar e identificar o "estado da arte" da tecnologia industrial brasileira de equipamentos de pequeno e médio porte para aproveitamento de fontes renováveis de energia. O projeto atuou nas seguintes áreas: Pequenas Centrais Hidrelétricas (PCH, Energia Solar, Energia Eólica, Biodigestores e Equipamentos de Biogás e Gaseificadores de combustíveis sólidos (Gasogênios, não somente "identificando" como "localizando" os atuais fabricantes de equipamentos utilizados no aproveitamento e renovação da energia. O projeto focalizou ainda os aspectos econômicos e financeiros das indústrias pesquisadas, tais como: caracterização e evolução recente, sua produção industrial em mercado atual e futuro, além das suas dificuldades na produção e comercialização de seus produtos.This work, sponsored by the Brazilian Research Council, carried out a sectorial appraisal of the manufacturers of equipment that use renewable energy sources. The survey was executed in Small Hydroelectric Plants, Solar Energy, Eolic Energy, Biogas and Gasification of solid combustible identifying the manufacturers and their localization. The survey pointed out the industries economical and financial aspects, as well as, the difficulties in producing and trading their products.

  13. System to monitoring/diagnosis on substations shielded and insulated at SF{sub 6}; Monitoramento/diagnostico em subestacoes blindadas e isoladas a SF{sub 6}

    Energy Technology Data Exchange (ETDEWEB)

    Direne, A.J.; Pereira, M.J. [FURNAS, Rio de Janeiro, RJ (Brazil); Martins, H.J.A. [CEPEL, Rio de Janeiro, RJ (Brazil); Noronha, R.F. [ITAIPU Binacional, Foz do Iguacu, PR (Brazil); Arjona, W. [GEC Alsthom Engineering Systems Ltd., Whetstone (United Kingdom)

    1991-12-31

    A guide to system diagnosis/monitoring in power substations insulated by gas (SF{sub 6}) are reported. A questionnaire was applied in the national and foreign companies working with these types of substation. Monitoring / diagnosis methods available on commercial and research scale, its limitations, and its abnormality detection capacity are shown 1 ref., 3 tabs.

  14. APROVEITAMENTO DE SORO DE QUEIJO DE COALHO NA ELABORAÇÃO DE BEBIDA LÁCTEA FERMENTADA

    Directory of Open Access Journals (Sweden)

    Junio Cesar Jacinto de Paula

    2012-10-01

    Full Text Available No Brasil bebida láctea é definida como o produto lácteo resultante da mistura do leite e de soro de leite. Por serem economicamente viáveis, as bebidas lácteas fermentadas são consideradas uma alternativa para o aproveitamento do soro de queijos. O objetivo deste trabalho foi elaborar, em escala industrial, e avaliar a qualidade e a estabilidade de uma bebida láctea fermentada, desenvolvida à base de soro de leite proveniente da fabricação de queijo de Coalho. Foram realizadas análises físico-químicas, microbiológicas e sensoriais do produto durante 28 dias de estocagem a 5ºC ± 1ºC. Os resultados mostraram que a bebida desenvolvida enquadra-se na denominação "Bebida Láctea Fermentada" definida pelo Regulamento Técnico de Identidade e Qualidade de Bebida Láctea, em relação ao teor de proteínas e à contagem de bactérias láticas. A composição físico-química encontra-se de acordo com a legislação, que estabelece o teor mínimo de proteína de 1,7% m/m. Porém, para obtenção do teor de gordura preconizado, mínimo de 2,0% m/m, deve-se utilizar leite integral ou padronizar a mistura antes da fabricação. Os resultados também indicam que o produto possui estabilidade microbiológica e pode ser armazenado por pelo menos 28 dias sob refrigeração a 5ºC. A bebida obteve boa aceitabilidade sensorial ficando entre os termos hedônicos "Gostei Moderadamente" e "Gostei Muito" durante todo o período avaliado. Pode-se concluir que a bebida é uma forma potencial para a utilização do soro de queijo de Coalho por ser um produto nutritivo, altamente aceitável e com custo reduzido.

  15. Availability analysis of high voltage substations considering its main equipment; Analise de disponibilidade de subestacoes de alta tensao considerando seus principais equipamentos

    Energy Technology Data Exchange (ETDEWEB)

    Santos, R.C. [Universidade Federal do ABC (UFABC), Santo Andre, SP (Brazil)], E-mail: ricardo.santos@ufabc.edu.br; Basseto, B.A.; Cugnasca, P.S.; Almeida Junior, J.R.; Camargo Junior, J.B. [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica], Emails: ricardo.santos@ufabc.edu.br, joao.camargo@poli.usp.br

    2009-07-01

    This paper evaluates the availability of electric power substations, based on Monte Carlo simulation and Fault Tree Analysis, which can be used in a larger way, considering various scenarios, usually founded. The main fallouts modes considered in the availability analysis of power systems, as well as the main methods applied to reach this goal are discussed. The availability indexes of the Monte Carlos simulation are sufficient to indicate the critical points of the power system, and to make comparisons between different substations, related to the performance levels. Through these indexes it is possible to evaluate the impact of a switching action in a determined substation. For this, the substation studied indexes are compared before and after the switching action be considered to the substation in reference.

  16. Testing the control systems of district heating substations under operating conditions

    Energy Technology Data Exchange (ETDEWEB)

    Koskelainen, R.; Ohvanainen, M.

    1996-12-31

    This research project `Testing the control systems of district heating substations under operating conditions` has been carried out at the Laboratory of Energy Economics and Power Plant Engineering at Helsinki University of Technology. A well-operating control system improves comfort of living and quality of district heating. In addition it saves energy. Testing of the control systems is a part of appropriate quality control and inspection. The aim of this research has been to develop a testing method for control systems of district heating substations. Operation of the control equipment has been studied in order to define the demands of a measuring method and equipment. Measurements have been done mainly in residential buildings under operating conditions and by changing the set value of the domestic hot water temperature. Several control problems occurred with temperature: oscillation, floating, deviation from the set value and transient fluctuations. Most of the problems occurred in controlling the domestic water temperature. A testing method should be developed so that all control problems are taken into account. Special attention should be paid to measuring time, sampling time, measuring sensors and equipment. The results of this study show that two separate testing methods should be developed. One should test whether the control equipment operates well or not. The other test should analyze the operation of control equipment and also find out what causes the control problems

  17. Evaluation of the Optimal Connection of Power Transformers in the Substations of a Hospital

    Directory of Open Access Journals (Sweden)

    Carlos Renedo

    2018-02-01

    Full Text Available Transformers are installed in power distribution systems to perform changes in supply voltage. Large consumers often have several transformers installed in parallel to ensure continuity of supply in the event of failure. These machines can achieve very high efficiency, but their efficiency is not constant since it depends on the power demanded at each time. Therefore, the level of efficiency that correspond to the operation of a specific transformer depends on two factors: machine technical characteristics and electrical load. In this work, the authors have proposed a methodology which shows the optimal number of transformers to be connected at each period in the substations of a large Spanish hospital, in order to achieve the maximum seasonal efficiency of these machines. The results of the energy saving are determined with respect to the current situation, in which all the transformers are permanently connected. On the other hand, the European Union has established a new regulation that sets the minimum energy efficiency requirements for new power transformers. This efficiency improvement is proposed to be applied gradually in two stages, a first limit came into force in 2015, while a more restrictive approach will appear in the year 2021. This work has also studied the potential energy savings that would occur when the substations of the hospital have more efficient transformers complying with the new European Regulation 548/2014.

  18. Occupational exposure to electric fields and currents associated with 110 kV substation tasks.

    Science.gov (United States)

    Korpinen, Leena H; Kuisti, Harri A; Tarao, Hiroo; Elovaara, Jarmo A

    2012-07-01

    The main aim of this study was to investigate occupational exposure to electric fields, and current densities and contact currents associated with tasks at air-insulated 110 kV substations and analyze if the action value of EU Directive 2004/40/EC was exceeded. Four workers volunteered to simulate the following tasks: Task (A) maintenance of an operating device of a disconnector at ground or floor level, Task (B) maintenance of an operating device of a circuit breaker at ground or floor level, Task (C) breaker head maintenance from a man hoist, and Task (D) maintenance of an operating device of a circuit breaker from a service platform. The highest maximum average current density in the neck was 1.8 mA/m(2) (calculated internal electric field 9.0-18.0 mV/m) and the highest contact current was 79.4 µA. All measured values at substations were lower than the limit value (10 mA/m(2)) of the EU Directive 2004/40/EC and the 2010 basic restrictions (0.1 and 0.8 V/m for central nervous system tissues of the head, and all tissues of the head and body, respectively) of the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Copyright © 2012 Wiley Periodicals, Inc.

  19. Principles for construction the compensators of reactive power with voltage stabilization for transformer substations

    Science.gov (United States)

    Vlasayevsky, Stanislav; Klimash, Stepan; Klimash, Vladimir

    2017-10-01

    Based on the booster transformer and the transistor converter with a DC link, a system is proposed for fast and accurate unloading the electric network from reactive power with simultaneous stabilization of voltage among consumers. The system contains a discrete stage of reactive power compensation and adjustable part. The adjustable part includes series and parallel reactive power compensators. The series compensator consists of a booster transformer, a voltage inverter and is designed to be switched on to the high voltage of the transformer substations. The parallel compensator consists of a rectifier with an input choke and is connected to the low voltage of the substation. The rectifier and inverter are connected by a DC link with an LC filter. The rectifier regulates the output voltage and the phase of the sinusoidal input current. The inverter regulates the magnitude and phase of the voltage on the control winding of the booster transformer. The rectifier and inverter control systems are synchronized with the network and with pulse width modulation.

  20. The insulation coordination and surge arrester design for HTS cable system in Icheon substation

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Hansang, E-mail: Hansang80@korea.ac.kr [School of Railway and Electrical Engineering, Kyungil University, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-701 (Korea, Republic of); Yoon, Dong-Hee [Department of New and Renewable Energy, Kyungil University, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-701 (Korea, Republic of); Lee, Seung-Ryul [Korea Electrotechnology Research Institute, Naeson-dong, Uiwang-si, Gyeonggi-do 437-080 (Korea, Republic of); Yang, Byeong-Mo [Korea Electric Power Research Institute, Munji-dong, Yuseong-gu, Daejeon 305-760 (Korea, Republic of); Jang, Gilsoo, E-mail: gjang@korea.ac.kr [School of Electrical Engineering, Korea University, Anam-dong 5-ga, Seongbuk-gu, Seoul 136-713 (Korea, Republic of)

    2013-01-15

    Highlights: ► It is necessary to study lightning response of the HTS cable. ► The analytic model has been developed for the HTS cable in the Icheon substation. ► Well-designed surge arrester has been verified through PSCAD/EMTDC simulations. -- Abstract: This paper proposes an insulation coordination and surge arrester design for HTS (High-Temperature Superconducting) cable system in Icheon substation in Korea. In the aspect of the economic analysis, since the HTS cable is very expensive, the insulation coordination to prevent the dielectric breakdown caused by the lightning surge should be considered carefully. Also, in the aspect of the power system reliability, since the HTS cable has much more capacity compared than conventional power cables and the ripple effect from the HTS cable failure may lead to the wide area blackout, an intensive study for insulation coordination from lightning surge is one of the most important considerations. In this paper, the insulation coordination for lightning surge is verified using HTS cable and power equipment models and the design of the proper surge arrester is proposed.

  1. Intercomparison of magnetic field measurements near MV/LV transformer substations: methodological planning and results.

    Science.gov (United States)

    Violanti, S; Fraschetta, M; Adda, S; Caputo, E

    2009-12-01

    Within the framework of Environmental Agencies system's activities, coordinated by ISPRA (superior institute for environmental protection and research), a comparison among measurements was designed and accomplished, in order to go into depth on the matter of measurement problems and to evaluate magnetic field at power frequencies. These measurements have been taken near medium voltage /low voltage transformer substation. This project was developed with the contribution of several experts who belong to different Regional Agencies. In three of these regions, substations having specific international standard characteristics were chosen; then a measurement and data analysis protocol was arranged. Data analysis showed a good level of coherence among results obtained by different laboratories. However, a range of problems emerged, either during the protocol predisposition and definition of the data analysis procedure or during the execution of measures and data reprocessing, because of the spatial and temporal variability of magnetic field. These problems represent elements of particular interest in determining a correct measurement methodology, whose purpose is the comparison with limits of exposure, attention values and quality targets.

  2. The Mounting process and dielectric tests of the Parque Caballero armored substation in SF6(220 Kv); Montaje y pruebas dielectricas de la estacion blindada en gas SF6 (220 kV) 'Parque Caballero'

    Energy Technology Data Exchange (ETDEWEB)

    Decoud, Carlos; Bobadilla, Alberto [ANDE - Administracion Nacional de Electricidad, Assuncion (Paraguay)

    2001-07-01

    This document approaches the aspects referring to the mounting and also dielectric tests for the Parque Caballero armored substation in SF6. This type of installation represents a innovation regarding substations in urban centres. The most relevant items in relation to the mounting process are shown in a summarized way, as well as the aspects related to dielectric tests executed during the substation commissioning.

  3. Aspectos funcionales de la psicoterapia analítico funcional.

    OpenAIRE

    Javier Virués Ortega; Alberto Descalzo Quero; José Fernando Venceslá Martínez

    2003-01-01

    Se considera una nueva psicoterapia de orientación conductual: la Psicoterapia Analítico Funcional. Se describen brevemente sus fundamentos teóricos, metodológicos y aplicados. Se discuten sus aspectos funcionales desde un punto de vista contextual.

  4. Grounding of metallic fences on urban regions substations; Aterramento de cercas metalicas de subestacoes situadas em regioes urbanas

    Energy Technology Data Exchange (ETDEWEB)

    Haffner, S.L. [Pontificia Univ. Catolica do Rio Grande do Sul, Porto Alegre, RS (Brazil); Dias, G.A.D.; Tello, M. [Companhia Estadual de Energia Eletrica do Estado do Rio Grande do Sul, Porto Alegre, RS (Brazil)

    1991-12-31

    Metallic fences on power substation situated on urban regions, its insulation, its localization according ground wire mashes, and the occurrence of dangerous electric voltage on its surfaces are described. An analytical method which permits planing a insulation model using a grounding system with insulated electrodes and an example of the method utilization are presented. 6 figs., 1 tab., 6 refs.

  5. A Comparative Study on Substation Types and Network Layouts in Connection with Low-Energy District Heating Systems

    DEFF Research Database (Denmark)

    Tol, Hakan; Svendsen, Svend

    2012-01-01

    The study deals with low-energy district heating (DH) networks operating in low temperatures such as 55 °C in terms of supply and 25 °C in terms of return. The network layout, additional booster pumps, and different substation types such as storage tanks either equipped or not equipped in domestic...

  6. Antena Kupu - Kupu sebagai Sensor Ultra High Frequency (UHF) untuk Mendeteksi Partial Discharge pada Gas Insulation Substation

    OpenAIRE

    Andre, Hanalde; Khayam, Umar

    2013-01-01

    Penggunaan antena sebagai penerima gelombang elektromagnetik dapat digunakan sebagai alat untuk mendeteksi kegiatan partial discharge (PD) yang terjadi pada paralatan tegangan tinggi. Khususnya pada gas insulation substation (GIS), karakteristik gelombang elektromagnetik yang dihasilkan terletak pada rentang ultra high frequency (UHF) dalam rentang 300 MHz – 3 GHz. Karakteristik antena ultra wide band (UWB) diperlukan untuk mendeteksi PD pada rentang yang lebar. Perancangan antena dilakukan...

  7. ANALYSIS OF ELECTROPHYSICAL CHARACTERISTICS OF GROUNDS IN THE VICINITY ELECTRICAL SUBSTATION OF UKRAINE

    Directory of Open Access Journals (Sweden)

    D.G. Koliushko

    2015-06-01

    Full Text Available Purpose. Definition of the direction for further research to improve accuracy of the calculation of rated parameters of ground grids based on the analysis of statistical databases of electro-physical characteristics of the soil. Methodology. To solve this problem we compiled the statistical base of soil of Ukraine in the location of electrical substation, we performed the statistical analysis for the number of layers of geoelectric structure, and electrical characteristics. In the experiments implemented the comparing of accuracy calculation of the most typical three-layer soil in the Ukraine, by the new three-layer model of ground grids and the equivalent two-layer model, which used previously. Results. On the results of analysis the ranges of the electrical resistivity and statistical distribution for electro-physical characteristics of the soil are determined. The resulting distributions allow to develop criteria for instruments, installations and means of interpretation during the sounding of soil, as well as the requirements for mathematical models of ground grids. It was found that the most typical for places of locations the electrical substations in Ukraine are three-layer geoelectric structures. In the paper the statistical distribution for three-layer soil by type (Q, K, H, A are described. The results of numerical experiments show that the use of methods to simplify of the multilayers soil does not allow the calculation of grounding grids with high accuracy. In the work recommendations for applicability the method equivalenting depending on the type of geoelectric structure are developed. Originality. For the first time, we obtained the statistical distribution of stratification of the soil in the location of power plant in Ukraine, determined the accuracy of the method to simplify a multi-layer soil in determining the rated parameters of grounding grids. In the paper the necessity to develop a mathematical model of the grounding

  8. Capacidad funcional y salud: orientaciones para cuidar al adulto mayor

    Directory of Open Access Journals (Sweden)

    CLARA INÉS GIRALDO M

    2008-07-01

    Full Text Available Objetivo: valorar la salud y la capacidad funcional de ancianos con dependencia funcional para el autocuidado, como elementos para orientar el cuidado de enfermería y el cuidado familiar en casa. Metodología: estudio descriptivo transversal en 40 personas de 65 y más años con dependencia funcional, cuidados por familiar, en Envigado Colombia; muestreo por conveniencia. Valoración de la capacidad funcional con el índice de Katz y la escala de Lawton y Brody, ajustados según grupo de Neurociencias, Universidad de Antioquia. Hallazgos: población entre 67 y 98 años, edad promedio 84,08 años; 82,5% mujeres. Sistemas orgánicos más afectados: cardiovascular, osteomuscular y neurológico; entre 47,5% y 27,5% de los ancianos los tenían comprometidos. Se identificaron dos comportamientos: los hombres, y las personas de edad más avanzada, con mayores grados de dependencia en las actividades básicas e instrumentales; no se determinó asociación estadística por el pequeño tamaño muestral. Las actividades básicas estaban afectadas así: entre el 67,5% y el 55% de los ancianos requería ayuda; y las actividades instrumentales estuvieron comprometidas: entre el 95% y el 75% de los ancianos son totalmente dependientes en ellas. Conclusiones: Enfermería ha de considerar la valoración de la capacidad funcional articulada al estado de salud integral de los ancianos, para orientar su cuidado y apoyar a los cuida-dores familiares. Esto además previene dependencias de cuidado innecesarias que estarían en contra de las aspiraciones del adulto mayor como individuo autónomo e independiente. Es tarea de profesionales en enfermería capacitar a cuidadores familiares sobre valoración de la capacidad funcional.

  9. The evolution of the Luz y Fuerza del Centro substations. Volume 2; Evolucion de las subestaciones de Luz y Fuerza del Centro. Volumen 2

    Energy Technology Data Exchange (ETDEWEB)

    Carranza Ramirez, Sergio [Luz y Fuerza del Centro, Mexico, D. F. (Mexico)

    1997-12-31

    This document cites historical background of how the Luz y Fuerza del Centro substations have evolved up to nowadays. A brief description is made of one electric substation, the substation design criteria are mentioned, since it must comply with the requirements of reliability, service continuity, service quality, economy, geographical location, just for mentioning some of them. The more utilized arrangements of the Luz y Fuerza del Centro substations are described. In the same manner, the remote control substations are described mentioning the main elements of this type of substations. Mention is made also of the technological incorporations that have been made to the substations and the perspectives there are from these. One line diagrams of the electric substations are shown, as well as from power plant substations [Espanol] Este documento cita antecedentes historicos de como han evolucionando las subestaciones de Luz y Fuerza del Centro hasta hoy en dia. Se realiza una breve descripcion de una subestacion electrica, se mencionan los criterios de diseno de una subestacion, ya que debe cumplir con los requisitos de confiabilidad, continuidad, calidad del servicio, economia, situacion geografica, por mencionar algunos de estos. Se describen los arreglos de las subestaciones mas utilizados por Luz y Fuerza del Centro. De igual manera se describen las subestaciones telecontroladas mencionando los principales elementos de este tipo de subestaciones. Se mencionan las incorporaciones tecnologicas que se han realizado a las subestaciones y las perspectivas que se tienen de estas. Se muestran diagramas unifilares de subestaciones electricas, al igual que se muestran las plantas de las subestaciones

  10. Technical process automatic control system programs for large substations and the electrical part of power plants

    Energy Technology Data Exchange (ETDEWEB)

    Lebedev, V.I.; Rosman, L.V.; Salamatova, V.P.; Shandura, Z.A.

    1981-04-01

    Technical process automatic control systems (TPACS) for large substations and the electrical part of power plants are created in order to increase operating reliability, decrease the cost of their operation, increasing work capacity, decreasing losses and increasing electrical energy quality. The use of TPACs will also provide a savings in capital outlay as a result of a decrease in reserve coefficients in selection of power equipment, an increase in industrialization of installation and a decrease in the amount of space occupied by control equipment. In order to obtain the maximum savings from the use of the TPACS, certain problems must be solved which cannot be solved using tradition automation means, or are not solved with sufficient accuracy using them or, finally, the solution of which, using TPACS, decrease the overall dimensions and the cost of control equipment. In this article, the authors describe methods for solving these problems. (JMT)

  11. Audible Noise Measurement and Analysis of the Main Power Apparatus in UHV GIS Substations

    Directory of Open Access Journals (Sweden)

    Zhou Nian Guang

    2016-01-01

    Full Text Available Investigation of audible noise characteristics of the main power apparatus in UHV GIS substations provides essential statistics for the noise prediction and control. Noise pressure level, spectrum and attenuation characteristics of the main transformers and high voltage (HV reactors are measured and analyzed in this paper. The result shows that the main transformer and HV reactor have identical A-weighted equivalent sound pressure level. The medium- and low-frequency noises are the primary components in the spectral. More attention should be paid to the low-frequency bands in the noise control process. The noise of cooling fan has a large influence on that of the main transformer. Without the consideration of corona noise, the average A-weighted sound pressure level shows an overall decreasing trend with the increase of the propagation distance. Obvious interference phenomenon of the noises at 100 and 200Hz exists in the noise propagation process.

  12. Seminoe-Kortes transmission line/substation consolidation project, Carbon County, Wyoming

    Energy Technology Data Exchange (ETDEWEB)

    1990-07-01

    The existing switchyards at Western Area Power Administration's (WESTERN) Seminoe and Kortes facilities, located approximately 40 miles northeast of Rawlines, Carbon County, Wyoming, were constructed in 1939 and 1951, respectively. The circuit breakers at these facilities are beyond or approaching their service life and need to be replaced. In addition, the switchyards have poor access for maintenance and replacement of equipment, and their locations create potential for oil spills into the North Platte River. WESTERN is proposing to consolidate the switchyard facilities into one new substation to provide easier access, restore proper levels of system reliability, and decrease the potential for oil contamination of the river. This environmental assessment (EA) was prepared to evaluate the impacts of the proposed Seminoe-Kortes Consolidation Project. 57 refs., 12 figs., 8 tabs.

  13. Study on ventilation and noise reduction in the main transformer room in indoor substation

    Directory of Open Access Journals (Sweden)

    Hu Sheng

    2016-01-01

    Full Text Available The noise emission should be considered in the ventilation and cooling design for the main transformer room of indoor substation. In this study, based on Soundplan software, effects of four common ventilation and cooling schemes on the cooling and sound insulation were compared. The research showed that the region with low noise requirement, the ventilation could be set on the outer wall or on the door of the main transformer room, while the region with high noise requirement, air inlet muffler or ventilation through the cable interlayer under the main transformer room must be used. All of the four kinds of ventilation schemes, ventilation through the cable interlayer is the best in cooling and noise reduction.

  14. Development of a system for detecting and locating damaged insulator strings with signals collected at substations

    Directory of Open Access Journals (Sweden)

    R. M. Capelini

    2015-04-01

    Full Text Available This paper presents a novel technique for remotely identifying and locating of damaged insulator strings based on an analysis of noise signals recorded on the ground connection of current transformers installed on transmission line substations. Damaged insulators usually present electrical surface activity. Surface and corona discharges may result in the generation of high frequency signals that can travel through the transmission line conductors, which are recorded by a data acquisition system. Each signal generated by the surface or corona discharge has a unique signature. This signature changes according to the position of the source, i.e., the damaged string along the line, which enables the association between the signal signature and the location of the string along the line. A method proposed to achieve this association is discussed in this paper as well as the tools and tests carried out during its development. An innovative way for capacitive coupling, which reduce detection system implementation costs is presented

  15. Investigation of Leakage Current Waveforms Recorded in a Coastal High Voltage Substation

    Directory of Open Access Journals (Sweden)

    E. Thalassinakis

    2011-06-01

    Full Text Available Leakage current monitoring is a widely employed technique to monitor the performance of outdoor insulation. The evaluation of leakage current waveforms recorded in the field, offers significant information since insulation’s performance is strongly linked with local conditions, and the waveforms’ shape correlate to different types of surface activity. In this paper, an investigation of leakage current waveforms recorded in a 150 kV coastal Substations suffering which suffers intense marine pollution is presented. Investigation of the recorded waveforms verified the basic waveform shapes described in the literature. Further, several variations of the basic types and complex waveforms, as well as field related waveforms, are presented. The need for added categorization criteria in the case of field measurements is discussed.

  16. Final environmental assessment for vegetation control at VHF stations, microwave stations, electrical substations, and pole yards

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-10-13

    Southwestern Power Adm. operates very high frequency (VHF) and microwave radio stations, electrical substations, and pole yards for electric power transmission throughout AR, MO, and OK. Vegetation growth at the stations must be suppressed for safety of operation and personnel. Southwestern has been using a combination of mechanical/manual and herbicide control for this purpose; Federally- mandated reductions in staff and budgetary resources require Southwestern to evaluate all potentially efficient methods for vegetation control. Three alternatives were examined: no action, mechanical/manual control, and (proposed) a combination of mechanical/manual and herbicide control. Environmental impacts on air and water quality, wetlands, wildlife, endangered species, archaeological and other resources, farmland, human health, transportation, etc. were evaluated.

  17. Type B investigation of electrical fault in 351 Substation, December 4, 1994

    Energy Technology Data Exchange (ETDEWEB)

    Debban, H.L.; Shearer, C.A.; Boger, R.M.; McDonald, G.P. [ICF Kaiser Hanford Co., Richland, WA (United States); Eyre, L.E.; Dell, L.D.; Kelly, D.S. [Westinghouse Hanford Co., Richland, WA (United States)

    1995-02-01

    On December 4, 1994, at 2132:10 hours, an electrical failure of a cable-tapping splice resulted in a fire in the 300 Area of the DOE Hanford Site. The fire occurred in the yard of Substation 351 in electrical Vault R122V, where the cable-tapping splice was located. The fire incinerated all cables passing to and through the vault causing them to fail. The failure of the cables resulted in a power outage to twenty customers in the 300 Area. The vault was electrically isolated, and power was restored to the electrical distribution system at 2311 hours. This report contains the accident scenario, accident analysis, direct cause and root and contributing causes.

  18. Development of a blocking logic checking apparatus for substation measurement and control devices

    Directory of Open Access Journals (Sweden)

    Chen Li

    2017-01-01

    Full Text Available After transforming substation measurement and control devices, the traditional method of blocking logic check needs to go back and forth among the measurement and control devices, and repeatedly connect a large number of wires, which lead to tedious operation and low efficiency. This paper developed a logic verification device based on 4G wireless communication, which used the Modbus/TCP transport protocol to access Ethernet, to complete the real-time data communication with the mobile control terminal. And this paper made a request to the logic controller according to practicality and cost. And the terminal software interface was designed by the orthogonal experimental design idea. The development of this device provided a new and efficient method for logic verification.

  19. Viabilidade do aproveitamento de água de chuva em zonas urbanas: estudo de caso no município de Belo Horizonte

    OpenAIRE

    Manuelle Prado Cardoso

    2009-01-01

    A presente pesquisa teve como objetivo geral avaliar a qualidade da água de chuva captada em Belo Horizonte - MG - Brasil, e verificar a percepção de moradores da cidade em relação ao aproveitamento dessa água para fins não potáveis. A pesquisa quantitativa, sobre a qualidade da água de chuva, foi realizada em duas regiões da cidade, Centro e Pampulha. Foram instalados dois sistemas pilotos em cada região, um apresentava superfície de captação constituída por telhas cerâmicas e o outro por te...

  20. Effect of extremely low frequency electromagnetic field exposure on sleep quality in high voltage substations

    Directory of Open Access Journals (Sweden)

    Barsam Tayebeh

    2012-11-01

    Full Text Available Abstract This study aims to investigate the effect of extremely low frequency electromagnetic fields exposure on sleep quality in high voltage substations (132, 230 and 400 KV in Kerman city and the suburbs. For this purpose, the electric field intensity and magnetic flux density were measured in different parts of substations, and then the occupational exposure was estimated by averaging electric field intensity and magnetic flux density in a shift work. The cases comprised 67 workers who had been exposed to electromagnetic fields in age range of 24–57 and the controls were 110 persons the age ranged 24–50 years. Sleep quality of both groups was evaluated by the Pittsburgh Sleep Quality Index questionnaire (PSQI. Finally, these data were subjected to statistical analysis. The results indicated that 90.5% of cases and 85.3% of controls had the poor quality sleep according to PSQI (P-value=0.615. Total sleep quality score mean for the case and control groups were 10.22 ± 3.4 and 9.74 ± 3.62 (P-value=0.415 ,respectively. Meantime to fall asleep for cases(35.68 ± 26.25 min was significantly higher than for controls (28.89 ± 20.18 min (P-value=0.002. Cases had average sleep duration of 5.49 ± 1.31 hours, which was lower ascompared with control subjects (5.90 ± 1.67hours. Although there was a higher percentage for the case group with poor sleep quality than the control group, but no statistically significant difference was observed.

  1. Effect of extremely low frequency electromagnetic field exposure on sleep quality in high voltage substations.

    Science.gov (United States)

    Barsam, Tayebeh; Monazzam, Mohammad Reza; Haghdoost, Ali Akbar; Ghotbi, Mohammad Reza; Dehghan, Somayeh Farhang

    2012-11-30

    This study aims to investigate the effect of extremely low frequency electromagnetic fields exposure on sleep quality in high voltage substations (132, 230 and 400 KV) in Kerman city and the suburbs. For this purpose, the electric field intensity and magnetic flux density were measured in different parts of substations, and then the occupational exposure was estimated by averaging electric field intensity and magnetic flux density in a shift work. The cases comprised 67 workers who had been exposed to electromagnetic fields in age range of 24-57 and the controls were 110 persons the age ranged 24-50 years. Sleep quality of both groups was evaluated by the Pittsburgh Sleep Quality Index questionnaire (PSQI). Finally, these data were subjected to statistical analysis. The results indicated that 90.5% of cases and 85.3% of controls had the poor quality sleep according to PSQI (P-value=0.615). Total sleep quality score mean for the case and control groups were 10.22 ± 3.4 and 9.74 ± 3.62 (P-value=0.415) ,respectively. Meantime to fall asleep for cases(35.68 ± 26.25 min) was significantly higher than for controls (28.89 ± 20.18 min) (P-value=0.002). Cases had average sleep duration of 5.49 ± 1.31 hours, which was lower ascompared with control subjects (5.90 ± 1.67hours). Although there was a higher percentage for the case group with poor sleep quality than the control group, but no statistically significant difference was observed.

  2. Design Optimization of a Natural Gas Substation with Intensification of the Energy Cycle

    Directory of Open Access Journals (Sweden)

    Arcangelo Pellegrino

    2010-01-01

    Full Text Available Natural gas is currently the natural substitute of petroleum as an energy source, since the foreseen ending up of this latter in the next decades. As a matter of fact, natural gas is easier to handle, less dangerous to be transported, somehow environmentally more friendly. The gas ducts operate with large flow rates over very long distances at high pressures, which are usually lowered in proximity of the final substations by lamination valves which, in fact, dissipate energy. However, a careful management of the pressure reduction may allow an energy recovery while using the gas expansion to operate a turbine. In this case, gas must be preheated to compensate for the energy required by the expansion. A proper control of all the parameters involved becomes crucial to an intelligent use of these resources. In this paper, the possibility of using a pre-heating system has been examined as a way to intensify the energy cycle in an expansion substation of the city gas network. Fuzzy logic has been used to optimize the natural gas expansion in a turbine to produce electrical energy. A fuzzy system has been designed and realized to control the whole process of gas expansion, from the gas pre-heating to the pressure reduction. The system operates over the whole year, accounting for the pressure, temperature, and gas flow rate variations experienced in the gas line. The exit values of the latter and the inlet value of the gas pressure are selected as input variables, being the output variable the temperature of the pre-heating water at the heat exchanger inlet.

  3. Cascading in district heating substations - in pursuit of low return temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Ljunggren, P.; Wollerstrand, J.; Frederiksen, S. [Department of Heat and Power Engineering, Lund Institute of Technology (Sweden)

    2004-07-01

    Building heating and provision of domestic hot water is characterised by a variation of temperature levels which provides a basis for lowered district heating network return temperature (increased cooling of primary water), by employing cascading of heat exchangers in substations. A number of previous studies have shown this, although the calculated gain has generally turned out to be rather small. Thus, in practice cascading often meets difficulties of justifying the higher investment cost associated with a more complicated substation configuration. The present study demonstrates, by simulations based on reliable modelling that especially when substantial heat losses from internal building pipes, leading hot service water to faucets, are compensated for, as is commonly done by re-circulating water in bigger buildings, that cascading can be adopted to achieve significant improvements in primary water cooling. On the basis of the results derived it can be recommended to divide heating of service water into two stages in most cases whenever re-circulation is performed, either in a parallel connection with a heat exchanger for space heating, or in a two-stage connection scheme where the entire primary flow is cooled in a pre-heater. Three-stage cascading can in some cases produce significant additional improvement. This is especially so in cases of a rather high service water temperature, such as 50-60 deg C (nowadays usually employed to prevent growth of Legionella bacteria), combined with a relatively modest space heating load (well-insulated buildings) at low temperature levels of water circulating in the hydronic system. Three-stage cascading can be configured in various ways: One scheme, previously used in certain Swedish towns, may be advantageous from a dynamic control point of view, but tends to cause heat exchanger scaling with hard town's water. An alternative type of three-stage configuration avoids this disadvantage, thus providing an attractive

  4. Major Refit for CERN's 400 kV Substation (Part of the new control and protection system for the 18 kV side)

    CERN Multimedia

    2001-01-01

    The 400 kV substation on the Prévessin site brings in the electricity that powers CERN's accelerators and the majority of the Laboratory's installations. It was originally built in the 1970s for the SPS, and is one of only five privately owned 400 kV sub-stations in France. Three of the others belong to the national railway company, SNCF, supplying the Paris-Marseilles TGV line, the other is at the Cadarache research centre near mouth of the Rhone. After nearly thirty years of service, CERN's substation has just undergone a complete overhaul.

  5. Programación funcional: conceptos y perspectivas

    Directory of Open Access Journals (Sweden)

    Fabio Augusto González Osorio

    2011-01-01

    Full Text Available El presente artículo muestra conceptos subyacentes a la programación funcional, así como características que los hacen un enfoque particular y novedoso de la programación que lo convierten en una clara opción frente al enfoque imperativo convencional en el área del desarrollo de software.

  6. Programacion funcional y lambda cálculo

    Directory of Open Access Journals (Sweden)

    Jonatan Gómez Perdomo

    1998-05-01

    Full Text Available En la primera parte de este artículo se explican algunos conceptos de los lenguajes de programación, haciendo énfasis en las caracteristicas y propiedades de los lenguajes de programación funcional. En la segunda, se realiza una introducción al lambda cálculo puro, su notación, axiomas y reglas elementales.

  7. TDAH, funciones ejecutivas y atención

    OpenAIRE

    Amador, Juan Antonio; Krieger, Virginia Edith

    2013-01-01

    Este documento presenta las características del trastorno por déficit de atención con hiperactividad (TDAH), los síntomas y conductas alteradas asociadas al trastorno y los problemas más comunes de las personas con TDAH. También se describe el concepto de las funciones ejecutivas (FE), las relaciones entre TDAH y FE y algunas estrategias e instrumentos útiles para la evaluación de las FE.

  8. Programacion funcional y lambda cálculo

    Directory of Open Access Journals (Sweden)

    Jonatan Gómez Perdomo

    2011-05-01

    Full Text Available En la primera parte de este artículo se explican algunos conceptos de los lenguajes de programación, haciendo énfasis en las caracteristicas y propiedades de los lenguajes de programación funcional. En la segunda, se realiza una introducción al lambda cálculo puro, su notación, axiomas y reglas elementales.

  9. Una aplicación de las funciones débilmente contractivas a problemas de valor en la frontera de funciones con valores en intervalos

    Directory of Open Access Journals (Sweden)

    Vladimir Angulo-Castillo

    2014-01-01

    Full Text Available Se estudia la existencia y unicidad de soluciones para problemas de valor en la frontera asociadas a ecuaciones diferenciales de funciones con valores en intervalos, usando la derivada de Hukuhara y algunos teoremas de punto fijo de funciones débilmente contractivas definidas en conjuntos par- cialmente ordenados.

  10. Las funciones introducidas por "si" con modelo de análisis sintáctico constitutivo-funcional

    OpenAIRE

    Bamberg, Celia Ferragut

    2008-01-01

    Es una monografía descriptiva de lengua, donde a través del método de análisis sintáctico funcional, llevaremos a cabo, con la técnica o modelo de análisis constitutivo-funcional, la verificación de la siguiente hipótesis ¿Será "si", la mayoría de las veces, una conjunción que introduzca una cláusula condicional o tendrá a menudo otros valores? Se comentará con detalle cada oración con la marca "si", tomadas de un corpus literario seleccionado, ordenando los resultados en una hoja matriz ant...

  11. Aproveitamento de soro de queijo para produção de iogurte probiótico

    Directory of Open Access Journals (Sweden)

    D.S. Soares

    2011-08-01

    Full Text Available Desenvolveu-se um iogurte natural aproveitando o soro de queijo de coalho, avaliando diferentes processos de pasteurização e concentração de leite em pó. Os iogurtes submetidos a 90ºC/5min nas concentrações de 8% e 10% de leite em pó não apresentaram diferenças entre si (P>0,05 quanto à aceitação sensorial. Os produtos foram caracterizados como integral, atenderam às exigências de proteínas e forneceram mais de 15% do requisito diário recomendado de cálcio para crianças de um a 10 anos, satisfazendo as exigências de cálcio. Em ambas as formulações, o pH decresceu de aproximadamente 4,6 para 4,2 e a acidez aumentou de 0,7g a 1,0g de ácido láctico/100g do produto durante 28 dias de armazenamento. Não houve contaminação por Staphilococcus aureus, coliformes fecais, bolores e leveduras. A contagem de bactérias láticas variou de 5,6x10(9 a 8,0x10(8UFC/g durante a vida de prateleira, sugerindo a promoção de efeitos benéficos por este alimento probiótico. Concluiu-se que a utilização do soro para a produção de iogurte é uma alternativa viável ao agregar valor econômico, nutricional e funcional ao subproduto.

  12. Principios variacionales de orden superior y con funciones de varias variables

    OpenAIRE

    Páez Sánchez, Jordi

    2014-01-01

    En esta memoria se trata de extender el principio variacional unidimensional de primer orden de Hamilton a los siguientes casos: principio variacional de orden superior con funciones de una variable, principio variacional de primer orden con funciones de varias variables (principio variacional múltiple) y principio variacional de segundo orden con funciones de varias variables. En particular, este último caso no se encuentra desarrollado habitualmente en la literatura del cálculo variacional....

  13. Hazard zoning around electric substations of petrochemical industries by stimulation of extremely low-frequency magnetic fields.

    Science.gov (United States)

    Hosseini, Monireh; Monazzam, Mohammad Reza; Farhang Matin, Laleh; Khosroabadi, Hossein

    2015-05-01

    Electromagnetic fields in recent years have been discussed as one of the occupational hazards at workplaces. Hence, control and assessment of these physical factors is very important to protect and promote the health of employees. The present study was conducted to determine hazard zones based on assessment of extremely low-frequency magnetic fields at electric substations of a petrochemical complex in southern Iran, using the single-axis HI-3604 device. In measurement of electromagnetic fields by the single-axis HI-3604 device, the sensor screen should be oriented in a way to be perpendicular to the field lines. Therefore, in places where power lines are located in different directions, it is required to keep the device towards three axes of x, y, and z. For further precision, the measurements should be repeated along each of the three axes. In this research, magnetic field was measured, for the first time, in three axes of x, y, and z whose resultant value was considered as the value of magnetic field. Measurements were done based on IEEE std 644-1994. Further, the spatial changes of the magnetic field surrounding electric substations were stimulated using MATLAB software. The obtained results indicated that the maximum magnetic flux density was 49.90 μT recorded from boiler substation, while the minimum magnetic flux density of 0.02 μT was measured at the control room of the complex. As the stimulation results suggest, the spaces around incoming panels, transformers, and cables were recognized as hazardous zones of indoor electric substations. Considering the health effects of chronic exposure to magnetic fields, it would be possible to minimize exposure to these contaminants at workplaces by identification of risky zones and observation of protective considerations.

  14. Holbrook Substation Superconductor Cable System, Long Island, New York Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Maguire, James; McNamara, Joseph

    2010-06-25

    The LIPA Superconductor project broke ground on July 4, 2006, was first energized on April 22, 2008 (Earth Day) and was commissioned on June 25, 2008. Since commissioning, up until early March, 2009, there were numerous refrigeration events that impacted steady state operations. This led to the review of the alarms that were being generated and a rewrite of the program logic in order to decrease the hypersensitivity surrounding these alarms. The high temperature superconductor (HTS) cable was energized on March 5, 2009 and ran uninterrupted until a human error during a refrigeration system switchover knocked the cable out of the grid in early February 2010. The HTS cable was in the grid uninterrupted from March 5, 2009 to February 4, 2010. Although there have been refrigeration events (propagated mainly by voltage sags/surges) during this period, the system was able to automatically switch over from the primary to the backup refrigeration system without issue as required during this period. On February 4, 2010, when switching from the backup over to the primary refrigeration system, two rather than one liquid nitrogen pumps were started inadvertently by a human error (communication) causing an overpressure in the cable cooling line. This in turn activated the pressure relief valve located in the grounding substation. The cable was automatically taken out of the grid without any damage to the components or system as a result of signals sent from the AMSC control cabinet to the LIPA substation. The cable was switched back into the grid again on March 16, 2010 without incident and has been operational since that time. Since switching from the backup to the primary is not an automatic process, a recent improvement was added to the refrigeration operating system to allow remote commands to return the system from backup to primary cooling. This improvement makes the switching procedure quicker since travel to the site to perform this operation is no longer necessary and

  15. Evaluation of current densities and total contact currents in occupational exposure at 400 kV substations and power lines.

    Science.gov (United States)

    Korpinen, Leena H; Elovaara, Jarmo A; Kuisti, Harri A

    2009-04-01

    This investigation studied the current densities in the neck and total contact currents in occupational exposure at 400 kV substations and power lines. Eight voluntary workers simulated their normal work tasks using the helmet-mask measuring system. In all, 151 work tasks with induced current measurements were made. Work situations were: tasks in 400 kV substations, tasks in 400-110 kV towers and the cutting of vegetation under 400 kV power lines. The average current density in the neck was estimated from the current induced in the helmet. The calculated maximum average current densities in the neck varied from 1.5 to 6.4 mA/m(2) and the maximum total contact currents from 66.8 to 458.4 microA. The study shows that the maximum average current densities and the total contact currents (caused by electric field) in occupational exposure at 400 kV substations and power lines does not exceed the limit and action values (10 mA/m(2) and 1 mA) of the new EU-directive 2004/40/EC (live-line bare-hand works excluded). (c) 2009 Wiley-Liss, Inc.

  16. Substation automation. Integration of applications of the SICLE; Automatizacion de subestaciones. Integracion de aplicaciones sobre el SICLE

    Energy Technology Data Exchange (ETDEWEB)

    Gutierrez, Gustavo; Vega, Miguel [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1997-12-31

    This paper presents the first applications developed by the Instituto de Investigaciones Electricas (IIE) on the infrastructure of the SICLE (Sistema de Informacion y Control Local de la Estacion) (Station Information and Local Control System), that Comision Federal de Electricidad (CFE) is now acquiring in order to automate its transmission substations. A computer infrastructure was obtained similar to the existing in the substation for the development of program testing at the IIE; the personnel of the same was trained; the applications in conjunction with the CFE specialists were defined; the agreed developments were made and installed at the Temascal II Substation. [Espanol] En el presente articulo se presentan las primeras aplicaciones desarrolladas por el Instituto de Investigaciones Electricas (IIE) sobre la infraestructura del SICLE (Sistema de Informacion y Control Local de Estacion) que esta adquiriendo la Comision Federal de Electricidad (CFE) a fin de automatizar sus subestaciones de transmision. Se obtuvo una infraestructura de computo similar a la existente en la subestacion para el desarrollo de prueba de programas en el IIE; se capacito al personal en la misma; se definieron las aplicaciones conjuntamente con los especialistas de la CFE; se hicieron los desarrollos acordados y se instalaron en la subestacion Temascal II.

  17. Assessment of the risk of failure of high voltage substations due to environmental conditions and pollution on insulators.

    Science.gov (United States)

    Castillo Sierra, Rafael; Oviedo-Trespalacios, Oscar; Candelo, John E; Soto, Jose D

    2015-07-01

    Pollution on electrical insulators is one of the greatest causes of failure of substations subjected to high levels of salinity and environmental pollution. Considering leakage current as the main indicator of pollution on insulators, this paper focuses on establishing the effect of the environmental conditions on the risk of failure due to pollution on insulators and determining the significant change in the magnitude of the pollution on the insulators during dry and humid periods. Hierarchical segmentation analysis was used to establish the effect of environmental conditions on the risk of failure due to pollution on insulators. The Kruskal-Wallis test was utilized to determine the significant changes in the magnitude of the pollution due to climate periods. An important result was the discovery that leakage current was more common on insulators during dry periods than humid ones. There was also a higher risk of failure due to pollution during dry periods. During the humid period, various temperatures and wind directions produced a small change in the risk of failure. As a technical result, operators of electrical substations can now identify the cause of an increase in risk of failure due to pollution in the area. The research provides a contribution towards the behaviour of the leakage current under conditions similar to those of the Colombian Caribbean coast and how they affect the risk of failure of the substation due to pollution.

  18. Impulsividad funcional y disfuncional en jovenes con consumo intensivo de alcohol

    National Research Council Canada - National Science Library

    Adan, Ana

    2012-01-01

    .... El presente trabajo se propone estudiar, por primera vez, las posibles diferencias en las dimensiones de impulsividad funcional y disfuncional del modelo de Dickman entre estudiantes universitarios...

  19. Funciones de la vitamina E: Actualización

    OpenAIRE

    Carmen Febles Fernández; Carmen Soto Febles; Alberto Saldaña Bernabeu; Bárbara E García Triana

    2002-01-01

    La vitamina E agrupa diferentes compuestos, dentro de los cuales se incluyen los tocoferoles y los tocotrienoles. El más importante en la especie humana es el RRR-alfa-tocoferol. Una de las funciones más importantes atribuidas a la vitamina E es su acción antioxidante. No obstante, se han observado otras no relacionadas con esta acción. Entre estas se encuentran sus efectos sobre la proliferación celular y la acción fagocítica en el sistema inmune, que a su vez se relacionan con el efecto de ...

  20. Cuatro funciones estratégicas de la diplomacia corporativa

    Directory of Open Access Journals (Sweden)

    Juan Luis Manfredi-Sánchez

    2017-12-01

    Full Text Available La diplomacia corporativa es el desarrollo instrumental de la estrategia que ordena la relación con los poderes públicos y privados en un entorno complejo y globalizado. Las corporaciones actúan como poderes diplomáticos en la representación, la negociación, la protección y la promoción de los intereses, las cuatro funciones básicas de la diplomacia que establece la Convención de Viena de 1961. La tarea de la diplomacia corporativa es una fuente de innovación directiva y una oportunidad de desarrollo profesional.

  1. Funciones Orbitofrontales en pacientes con Demencia tipo Alzheimer

    OpenAIRE

    Solórzano Jiménez, Luis Mariano

    2016-01-01

    [ES] La DTA se caracteriza por el deterioro progresivo de la memoria y de otras áreas de la función cognitiva, tal es el caso de las funciones ejecutivas (FE), propias de la corteza prefrontal (CPF) y relacionadas con la autorregulación del comportamiento. De esta forma, los procesos asociados a las FE pueden ser de índole cognitivo (memoria de trabajo, razonamiento, resolución de problemas, planificación, secuenciación, atención sostenida, resistencia a la interferencia, utilización de feedb...

  2. EDAs con funciones de cópula

    OpenAIRE

    Flores de la Fuente, Emma

    2009-01-01

    Un Algoritmo de Estimación de Distribución (EDA, por sus siglas en inglés), construye un modelo de probabilidad conjunta para representar una población. Existen varias estrategias pero en esta tesis el modelo se construye utilizando funciones de cópula. Un parámetro de la cópula bivariada es la dependencia entre el par de variables, estimada por una "rho de Spearman" ó la "tau de Kendall". Se presentan los algoritmos y experimentos con dos nuevos EDAs: MIMIC con cópula Gaussiana (MIMIC-CG), y...

  3. El Graduado Social y sus funciones en el proceso laboral.

    OpenAIRE

    Fernández Henares, Juan

    2016-01-01

    1.- Inicio de la profesión de Graduado Social 1.1.- Ministerio de Trabajo 1.2.- Escuelas Sociales 2.- Definición actual de la Profesión de Graduado Social 3.- Estudios Universitarios. Títulos habilitantes para el ejercicio de la profesión 3.1.- Graduado Social Diplomado 3.2.- Diplomado en Relaciones Laborales 3.3.- Licenciado en Ciencias del Trabajo 3.4.- Grado en RRLL y RRHH 4.- Funciones o competencias del Graduado Social en el proceso laboral 4.1.- Ley Orgánica del...

  4. Modificaciones de las condiciones de trabajo: movilidad funcional

    OpenAIRE

    Fernández Márquez, Daniel

    2017-01-01

    Nos movemos en un entorno fluctuante donde es necesario adaptarse a los cambios y en particular, es necesaria la flexibilidad laboral, que permita que la empresa pueda adaptarse a los cambios evitando así despidos y costes económicos y/o temporales. La movilidad funcional es una de las medidas que permite, a través de los grupos profesionales, hacer que la empresa pueda romper las rigideces y permitir a la empresa que logre adaptarse al entorno, permitiendo que ante por ejemplo, la aparición ...

  5. Measurement of the Magnetic Fields from High-Voltage (230 kV Substations in Tehran and Assessment of Their Effects

    Directory of Open Access Journals (Sweden)

    Mahdieh Sharifi Fard

    2010-06-01

    Full Text Available Introduction: Recent industrial developments in human societies have caused rapid advancements in technologies of production and distribution of electricity, which in turn result in enhancement of power networks and utilization of high voltages. These networks and the high voltages in transfer lines cause the exposure to electric and magnetic fields. In this study, the situation regarding the magnetic fields from high-voltage (230 kV substations in Tehran was investigated. Material and Methods: In this study, 8 high-voltage (230 kV substations were selected (Shous, Shahid Firouzi, Ozgol, Kan, Tehranpars, Azadegan, Ghorkhane and Besat substations. The premises of each substation was divided into some stations and measurements were done in each one. Measurements were done according to the IEEE std 644-1994 Standard in a way that the device, specifically its probe, was kept at a height of 1 meter above the ground surface. Then, we tried to examine the probable effects of exposure to magnetic fields through the Essex questionnaire, with Cronbach coefficient of 94%, completed by the employees of the substations. These questionnaires were completed by substation operators as an exposed group (36 persons and the employees of the office section of the Tehran regional electric company as a witness group (32 persons. Results: The measured density in none of the stations exceeded the standard limits of the International Commission on Non-Ionizing Radiation Protection. With regard to the questionnaire results about mental and neurological, cardiac and respiratory, and gastrointestinal and auditory disorders, we observed significant differences between witness and exposed groups, however, regarding skin allergies, there was no significant difference. Conclusion: Among all control rooms, the highest measured magnetic field was 6.9 mG in the Ozgol Substation Control Room and the lowest was 2 mG in the post of Shahid Firouzi. The control room of Ozgol

  6. EFFECTS OF ELECTROMAGNETIC FIELDS ON HEMATOPOISIS SYSTEM: STUDY ON WORKERS AT HIGH- VOLTAGE SUBSTATIONS

    Directory of Open Access Journals (Sweden)

    H.A YOUSEFI

    2001-06-01

    Full Text Available Introduction: The goal of this study was to evaluate the relationship between occupational exposure to extremely low frequency (ELF electromagnetic fields and risk of Hematological changes among workers at High- voltage substations. This is a case - control study. In the present study 79 worker exposed to electromagetic fields (EMFs were compared to 50 control subjects who were not occupationaly exposed to EMFs. Methods: To measurement the levels of exposure to Lf electric and magnetic fields the strength of electric and magnetic field was determined by Dosimetric method. Worker"s blood samples were collected and analyzed for identification of leukemia and other abnormalities. Questionnaire and physical examination were used to study the effects of ELF fields on worker"s health. Measurements showed a high strength of ELF fields at the work places i.e. Results: Mean value of RBC and Hematocrit decreased significantly among exposed workers compared to controls (P < 0.05, but MCV, MCH and MCHC increased. The value of Neutrophiles increased but Lymphocytes decreased significantly among workers considering their workhistory (P < 0.05. Discussion: Moreover, tow leukemics (ALL, AML and ten hypocromic anemias were found. In conclusion study groups are similar in personal characteristics, the difference in RBC, MCV, MCH has to attributed to ELF fields.

  7. ω to β Transformation in Group IV B Elements: Hugoniot Discontinuities and Relation with d Substates.

    Science.gov (United States)

    Joshi, K. D.; Jyoti, G.; Gupta, Satish C.; Sikka, S. K.

    2001-06-01

    The ω (hexagonal) to β (bcc) transformation in Zr and Hf occurs at 30 and 71 GPa under static pressures with corresponding Hugoniot discontinuities around 26 and 60 GPa. This transition has not been found in Ti up to 87 GPa. Our FP-LAPW calculations predict an ω-β transition in Ti around 118 GPa (V/V_o= 0.63) along isotherm. The temperatures near this compression estimated from our theoretical Hugoniot are much above its melting point suggesting that ω-β transition may not occur along the Hugoniot. The ω to β transition pressures, 118, 30 and 71 GPa for Ti, Zr and Hf, respectively, do not follow the trend implied by the principle of corresponding states. We have analysed the causes for this anomalous trend. We observe that the ω-β transition depends on how the increased d-poulation due to s-d transfer under pressure is distributed in the different d-substates. For example, at ambient condition, bcc phase is unstable and the difference between the average charges in the bcc stabilizing d-t_2g state and the destabilizing d-eg state are 0.008, 0.082 and 0.013 for Ti, Zr and Hf, respectively. Compression increases this difference and stablizes bcc structure when it becomes about 0.1. The charge transfer needed for stablizing β structure is highest for Ti followed by Hf and then Zr, in line with the trend in transition pressures.

  8. Simulation and Study of Power Quality Issues in a Fixed Speed Wind Farm Substation

    Directory of Open Access Journals (Sweden)

    T. Magesh

    2015-01-01

    Full Text Available Power quality issues associated with the fixed speed wind farm substation located at Coimbatore district are investigated as the wind generators are tripping frequently. The investigations are carried out using two power quality analyzers, Fluke 435 and Dranetz PX5.8, with one of them connected at group control breaker of the 110 kV feeder and the other at the selected 0.69 kV generator busbar during the period of maximum power generation. From the analysis of the recorded data it is found that sag, swell, and transients are the major events which are responsible for the tripping of the generators. In the present study, simulation models for wind, turbine, shaft, pitch mechanism, induction generator, and grid are developed using DIgSILENT. Using the turbine characteristics, a two-dimensional lookup table is designed to generate a reference pitch angle necessary to simulate the power curve of the passive stall controlled wind turbine. Various scenarios and their effects on the performance of the wind farm are studied and validated with the recorded data and waveforms. The simulation model will be useful for the designers for planning and development of the wind farm before implementation.

  9. Simulation and study of power quality issues in a fixed speed wind farm substation.

    Science.gov (United States)

    Magesh, T; Chellamuthu, C

    2015-01-01

    Power quality issues associated with the fixed speed wind farm substation located at Coimbatore district are investigated as the wind generators are tripping frequently. The investigations are carried out using two power quality analyzers, Fluke 435 and Dranetz PX5.8, with one of them connected at group control breaker of the 110 kV feeder and the other at the selected 0.69 kV generator busbar during the period of maximum power generation. From the analysis of the recorded data it is found that sag, swell, and transients are the major events which are responsible for the tripping of the generators. In the present study, simulation models for wind, turbine, shaft, pitch mechanism, induction generator, and grid are developed using DIgSILENT. Using the turbine characteristics, a two-dimensional lookup table is designed to generate a reference pitch angle necessary to simulate the power curve of the passive stall controlled wind turbine. Various scenarios and their effects on the performance of the wind farm are studied and validated with the recorded data and waveforms. The simulation model will be useful for the designers for planning and development of the wind farm before implementation.

  10. Simulation of the Static VAR Compensator Culiacan Three Substation for the Analysis of Transients

    Directory of Open Access Journals (Sweden)

    Coronel-Mercado Luis Enrique

    2013-06-01

    Full Text Available Since its emergence in the late 60’s the FACTS (Flexible AC Transmission Systems have been and continue to be studied and implemented in all electrical networks around the world, becoming an essential element for stability, control and maximum exploitation of thereof. One of the most used FACTS devices is the Static VAR Compensator or SVC. In this work, the modeling in Simulink of the Static VAR Compensator installed at the substation Culiacán Tres (CUT belonging to CFE is presented. The SVC is the ability of ±100 MVAR and ABB brand. The modeling was performed to visually program in detail the different subsystems in Simulink such as the timing unit, the TSC (thyristor switched capacitor, TCR (thyristor controlled reactors, filters of the 5th and the 7th harmonic, the transformer bank, the control unit, distribution unit and the measurement unit. Data for major components were taken from data sheet and equipment manuals. ASPEN software was used in order to obtain Thevenin equivalent of the EPS to connect to them the SVC model to test the step and three-phase short circuit. The results of these tests were compared with test results of commissioning of the SVC.

  11. Methodology to establish the profile that defines a meta-specification that applies to distribution substations - Mexico case based on norm IEC-61850; Metodologia para establecer el perfil que define una meta-especificacion que aplica a subestaciones de distribucion -caso Mexico- basada en la norma IEC-61850

    Energy Technology Data Exchange (ETDEWEB)

    Picazo Blanquel, Cuitlahuac; Chairez Campos Carlos; Garcia Hernandez, Joaquin; Godinez Enriquez, Hebert; Poujol Galvan, Francisco C.; Suarez Cerda, Dionisio A. [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Villalobos Ramos, Andres; LLamas Gonzalez, Rosa E. [Comision Federal de Electricidad (Mexico); Samitier Otero, Carlos [Global Networking Engineering (Spain)

    2010-07-01

    In this article is presented a case of study of automation of electrical substations of Comision Federal de Electricidad (CFE) of Mexico, in which the Norm IEC-61850 has been taken as reference. The case of study consists of defining a metaspecification for the protection, control, measurement and communication systems required by the substations of electrical distribution. For the development the obtained previous experience in the development of a bequeathed system SA, norm IEC61850 has been taken as reference, as well as the experiences documented in the Instituto de Investigaciones Electricas (IIE), the Comision Federal de Electricidad (CFE) and Global Networking Engineering (GNE), Spain. This way, the obtained result is the metaspecification, which establishes the application of the control, protective equipment and measurement under the interoperability concepts, as well as the automation functions of substations applied in the intelligent networks (REI's). The methodology put into practice includes the design of the system architecture (SAS), the operation philosophy, the topology of the communications network, the data modeling one with logical nodes that include data types and classes of common data (CDC), transference of information, and administration of the archives ICD, SSD, SCD, and CID. [Spanish] En este articulo se presenta un caso de estudio de automatizacion de subestaciones electricas de la Comision Federal de Electricidad (CFE) de Mexico, en el cual se ha tomado como referencia la norma IEC-61850. El caso de estudio consiste en definir una metaespecificacion para los sistemas proteccion, control, medicion y comunicaciones requeridos por las subestaciones de distribucion electrica. Para el desarrollo se ha tomado como referencia la experiencia previa obtenida en el desarrollo de un sistema SA legado, la norma IEC61850, asi como las experiencias documentadas en el Instituto de Investigaciones Electricas (IIE), la Comision Federal de

  12. Editorial: Las funciones del médico moderno

    Directory of Open Access Journals (Sweden)

    Facultad de Medicina Revista

    1994-04-01

    Full Text Available Es bien conocida la definición de la Medicina como arte y como ciencia, siendo este último elemento el más nuevo históricamente y el que ha tenido cambios más acelerados que implican delimitación y redefinición de tareas. La vida moderna también ha hecho aparecer o destacar funciones relacionadas con la medicina como arte: el médico como proveedor de bienestar individual y colectivo. Además, la organización social ha traído tareas administrativas o gerenciales, que son nuevas en el quehacer de los médicos. Este panorama de diversificación de funciones exige un análisis que permita contribuir a una apropiada definición de los fines de la profesión médica, y por lo tanto, a las características de la educación médica.

  13. Las funciones inalterables del periodista ante los perfiles multimedia emergentes

    Directory of Open Access Journals (Sweden)

    P Sánchez-García

    2015-03-01

    Full Text Available Introducción. Esta investigación aborda el estudio de las funciones y de los perfiles del periodista en el nuevo entorno multimedia. Metodología. Se recurre a una metodología cualitativa de revisión documental, que contribuye a una actualización del campo de conocimiento, junto a una entrevista con cuestionario a colectivos de periodistas españoles sobre el objeto de estudio. Resultados. Refleja las coincidencias entre el ámbito académico y profesional en torno a las funciones inalterables del periodista frente a los nuevos perfiles multimedia emergentes y desarrolla el modelo de los perfiles formativos que establece la Aneca. Discusión. El nuevo entorno mediático evidencia la necesidad de revisión de conceptos desfasados y mantiene abierto el debate científico acerca de las tareas que se potencian en la labor periodística, así como la redefinición de perfiles profesionales y formativos que aún están en proceso de configuración en un panorama mediático en transición.

  14. Dependencia funcional y bienestar en personas mayores institucionalizadas

    Directory of Open Access Journals (Sweden)

    María Teresa Rodríguez Díaz

    2014-06-01

    Full Text Available El presente estudio tiene como objetivo evaluar el bienestar emocional de las personas mayores de 60 años en relación al grado de dependencia funcional. Como indicadores del bienestar se evalúan los niveles de depresión (Yesavage y ansiedad (STAI-R, la satisfacción vital (CSV y la ansiedad ante la muerte (DAS. Se ha realizado un estudio descriptivo transversal en un grupo de personas mayores de 60 años (n=103. Los datos se han recogido usando cuestionarios estandarizados. Para el análisis de los datos se han utilizado correlaciones bivariadas entre las principales medidas, análisis univariado (ANOVA y la prueba de Bonferroni para comprobar las diferencias significativas entre los grupos (p< .05. Los resultados indican que se encuentran diferencias significativas entre los grupos de dependencia para la edad, deterioro cognitivo, depresión y ansiedad ante la muerte. En conclusión, se encuentra una relación directa entre el grado de dependencia funcional y el nivel de malestar emocional.

  15. Una aplicación de las funciones débilmente contractivas a problemas de valor en la frontera de funciones con valores en intervalos

    OpenAIRE

    Vladimir Angulo-Castillo

    2014-01-01

    Se estudia la existencia y unicidad de soluciones para problemas de valor en la frontera asociadas a ecuaciones diferenciales de funciones con valores en intervalos, usando la derivada de Hukuhara y algunos teoremas de punto fijo de funciones débilmente contractivas definidas en conjuntos parcialmente ordenados. Abstract. We study the existence and uniqueness of solutions for boundary value problems associated to differential equations of interval-valued functions, by us...

  16. Fundamentos de la teoría de funciones de una variable compleja: iii

    OpenAIRE

    Charris Castañeda, Jairo Antonio

    2013-01-01

    Funciones de una variable compleja 1.        Funciones complejas de una variable compleja. Sea Ω un abierto de ℂ. Una aplicación f : Ω → ℂ se denomina una función compleja de una variable compleja. Si para todo z ϵ Ω  definimos

  17. Thermal properties of three sub-states of quasi-single helicity states on RFX-mod

    Science.gov (United States)

    Zhang, Y.; Auriemma, F.; Fassina, A.; Lorenzini, R.; Terranova, D.; Momo, B.; Martines, E.

    2017-12-01

    Quasi-single helicity (QSH) state has been widely observed in reversed field pinch devices to sustain thermal structures, enclosed by steep temperature gradients interpreted as electron internal transport barriers (eITB). Within the evolution of a QSH cycle, three sub-states can be identified in the RFX-mod experiment, named DAx, SHAx n and SHAx w , where the subscript n and w indicate narrow and wide thermal structures, respectively. Such sub-states feature different magnetic topologies as well as different width of the thermal structures. This paper presents a characterization of the three QSH sub-states mainly devoted to describe the properties of the eITB temperature gradients. The analyses show a decreasing trend of the absolute value of the thermal gradient as the dominant mode increases. Further study on the thermal diffusivity confirms that these behaviors are essentially due to the local change of the heat transport. Besides, the thermal gradient in DAx and SHAx n groups shows an increasing trend with the decrease of secondary modes. Such behavior has been studied and it can be explained by stochastic transport in agreement with what found for SHAX w (Lorenzini et al 2012 Nucl. Fusion 52 062004). As for SHAx w group, the thermal gradient suddenly decreases with respect to DAx and SHAx n values. This behavior can still be explained in the framework of stochastic transport considering the structure of magnetic perturbations at the location of thermal gradients (Lorenzini et al 2016 Phys. Rev. Lett. 116 185002). The total energy confinement time {τ }E has also been evaluated, adopting a more appropriate method. The result shows that the energy confinement time increases up to 40% from DAx to SHAx w .

  18. Entrenamiento funcional del core: eje del entrenamiento inteligente

    Directory of Open Access Journals (Sweden)

    Iván Dario Pinzón Ríos

    2016-08-01

    Full Text Available Antecedentes: La evolución del entrenamiento físico busca la optimización de la salud y el bienestar, como piedra angular de todo programa de ejercicio. El Entrenamiento Funcional (EF es recomendable para optimizar el control postural del core, mejorando el balance y la ejecución de actividades de la vida diaria.  Objetivo: Revisar la definición, elementos constitutivos, características e implicaciones del EF del core en el movimiento corporal humano (MCH y la salud desde la perspectiva del fisioterapeuta. Metodología: Se incluyeron artículos en inglés y español de las bases Pubmed, Scielo y Ebsco; adicionalmente se incluyeron fuentes electrónicas e impresas y libros. Resultados: 56 documentos cumplieron los criterios de inclusión. La definición más adoptada de EF fue entrenar con un propósito buscando obtener un efecto positivo en la aptitud física. Las implicaciones del EF en el MCH, se relacionan con la ganancia y mejoría de la estabilidad. La propuesta de EF enfocada a las actividades de la vida diaria incluye fases que permiten adquirir la estabilidad hasta lograr el desarrollo de movimiento que demanden más agilidad. En la planificación del EF se deben estructurar los procesos a ejecutar considerando el criterio de funcionalidad. Para organizar la sesión del EF, el fisioterapeuta cuenta con tres maneras de planificar la sesión: globales, por hemisferios y por grupos musculares. Conclusión: La fundamentación teórica sobre el EF permite al fisioterapeuta comprender y determinar cómo esta modalidad de intervención repercute de manera positiva sobre el desempeño funcional y calidad de vida de los sujetos.

  19. Funciones de la vitamina E: Actualización

    Directory of Open Access Journals (Sweden)

    Carmen Febles Fernández

    2002-04-01

    Full Text Available La vitamina E agrupa diferentes compuestos, dentro de los cuales se incluyen los tocoferoles y los tocotrienoles. El más importante en la especie humana es el RRR-alfa-tocoferol. Una de las funciones más importantes atribuidas a la vitamina E es su acción antioxidante. No obstante, se han observado otras no relacionadas con esta acción. Entre estas se encuentran sus efectos sobre la proliferación celular y la acción fagocítica en el sistema inmune, que a su vez se relacionan con el efecto de esta vitamina como mensajero del estado oxidativo celular. Paralelamente, existen evidencias de su relación con la apoptosis. En este trabajo pretendemos profundizar en estas funciones de la vitamina E por sus enormes potencialidades de utilización en la terapia de enfermedades médicas y estomatológicas.Vitamin E comprises different compounds such as tocopherols and tocotrienols. The most important in the human species is RRR-alpha-tocopherol. One of the main functions attributed to vitamin E is its antioxidant action. However, other functions have been observed that are not connected with this action, as its effects on cellular proliferation and the fagocitic action in the immune system that is related at the same time to the effect of this vitamin as a messenger of the oxidative cellular state. Parallel, there are other evidences of its relationship with apoptosis. In this paper we intend to go deep into these functions of vitamin E due to its great potentialities to be used in the therapy of medical and dental diseases.

  20. Resonancia magnética funcional Functional magnetic resonance

    Directory of Open Access Journals (Sweden)

    Erick Sell

    2007-01-01

    Full Text Available La resonancia magnética funcional (RMNf es un estudio no invasivo de mapeo funcional cerebral, cuya señal obtenida en secuencias T2* es dependiente del nivel de oxigenación sanguínea (BOLD. Este estudio se agrega actualmente a otros muchos empleados en el abordaje de pacientes candidatos a cirugía de epilepsia, para localizar lenguaje y función motriz previa a planear la cirugía. Tiene una concordancia con el test de WADA de cerca del 90%. El uso concomitante de registro encefalográfico y RMNf es técnicamente difícil, pero una vez filtrados los artefactos presenta un patrón de activación significativamente discordante con el foco de actividad interictal. Este hallazgo podría obedecer a redes complejas de actividad epiléptica, y promete ser un útil instrumento en la investigación de la fisiopatología del tejido epileptogénico.Functional magnetic resonance imaging (fmri is a non-invasive functional brain mapping technique ased on blood oxygenated level dependent signal (BOLD. It is obtained during T2* weighted imaging MRI studies. fmri aids in the localization of language and motor function for patients candidates for epilepsy surgery, and has up to a 90% concordance with WADA test. Even though synchronous recording of fmri and EEG is technically challenging, it shows a discordant pattern of activation when compared with EEG or electrocorticography. This finding could be due to complex epileptic networks, and overall this study technique has the potential to contribute to further research into epileptic network and epilepsy physiopathology.

  1. Entrenamiento funcional del core: eje del entrenamiento inteligente

    Directory of Open Access Journals (Sweden)

    Iván Dario Pinzón Ríos

    2015-06-01

    Full Text Available Antecedentes: La evolución del entrenamiento físico busca la optimización de la salud y el bienestar, como piedra angular de todo programa de ejercicio. El Entrenamiento Funcional (EF es recomendable para optimizar el control postural del core, mejorando el balance y la ejecución de actividades de la vida diaria.  Objetivo: Revisar la definición, elementos constitutivos, características e implicaciones del EF del core en el movimiento corporal humano (MCH y la salud desde la perspectiva del fisioterapeuta. Metodología: Se incluyeron artículos en inglés y español de las bases Pubmed, Scielo y Ebsco; adicionalmente se incluyeron fuentes electrónicas e impresas y libros. Resultados: 56 documentos cumplieron los criterios de inclusión. La definición más adoptada de EF fue entrenar con un propósito buscando obtener un efecto positivo en la aptitud física. Las implicaciones del EF en el MCH, se relacionan con la ganancia y mejoría de la estabilidad. La propuesta de EF enfocada a las actividades de la vida diaria incluye fases que permiten adquirir la estabilidad hasta lograr el desarrollo de movimiento que demanden más agilidad. En la planificación del EF se deben estructurar los procesos a ejecutar considerando el criterio de funcionalidad. Para organizar la sesión del EF, el fisioterapeuta cuenta con tres maneras de planificar la sesión: globales, por hemisferios y por grupos musculares. Conclusión: La fundamentación teórica sobre el EF permite al fisioterapeuta comprender y determinar cómo esta modalidad de intervención repercute de manera positiva sobre el desempeño funcional y calidad de vida de los sujetos.

  2. First operation experiences from a 30 kV 104 MVA HTS power cable installed in a utility substation

    DEFF Research Database (Denmark)

    Willen, D.; Hansen, F.; Daumling, M.

    2002-01-01

    An HTS cable with a voltage rating of 30 kV and a power rating of 104 MVA, has been installed and operated in the electric grid of Copenhagen Energy in the spring of 2001. This article describes the development phases, the system specifications, and the first experiences of operation under...... realistic conditions in the substation of Amager (AMK). Approximately 50 000 private and business customers are supplied from this cable. The load can be adjusted from 20% to 100% of the power supplied and the number of branches connected can be altered. This and other early HTS power installations...

  3. Numerical modelling and experimental measurements for a low-temperature district heating substation for instantaneous preparation of DHW with respect to service pipes

    DEFF Research Database (Denmark)

    Brand, Marek; Thorsen, Jan Eric; Svendsen, Svend

    2012-01-01

    as much as possible. This requires a review and improvement of a DH network, in-house substations, and the whole domestic hot water (DHW) supply system, with the focus on user comfort, hygiene, overall cost and energy efficiency. This paper describes some practical approaches to the implementation of low......-temperature district heating (LTDH) with an entry-to-substation temperature around 50 °C. To this end we developed a numerical model for an instantaneous LTDH substation that takes into consideration the effect of service pipes. The model has been verified and can be used for the further optimization of the whole...... concept as well for individual components. The results show that the way that the service pipe is operated has a significant effect on waiting time for DHW, heat loss, and overall cost. Furthermore, the service pipe should be kept warm by using a bypass in order to fulfil the comfort requirements for DHW...

  4. Draft Supplement to the Environmental Statement Fiscal year 1976 Proposed Program : Facility Location Evaluation for Lake Isabella Service (Kamilche Substation) Study Area 75-12.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1974-10-22

    The statement describes the environmental impacts resulting from the construction of a new substation near Shelton, Washington. Land requirements for the new substation would be approximately 1.5 acres and, depending on the final site location chosen, an access road ranging from 200 to 3000 feet would also be required. Alternative sites 1 and 3 would be located on existing right-of-way and would remove 1.5 acres from other potential uses; alternate sites 2 and 4 would remove 1/4 acre of private timberland from production and 1 acre of existing right-of-way from other potential uses. Disturbance to wildlife during construction and loss of habitat associated with the above land requirements will occur. Grading for the substation site and access road will result in increased erosion and potential sedimentation in local streams may occur. Noise impacts will occur during construction.

  5. Draft Supplement to the Environmental Statement Fiscal Year 1976 Proposed Program : Facility Location Evaluation for Pleasant Prairie Service (Bigelow Substation) Study Area 75-8.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1974-10-22

    The proposed plan of service consists of the construction of a new substation near Millwood, Washington. Land requirements for the new substation would be approximately 3 to 5 acres of land depending on the final site location chosen, and approximately 100 to 500 feet of access road would also be needed. The above requirements would remove 3 to 5 acres of land from agricultural production. Disturbance to wildlife during construction would occur and habitat associated with the above agricultural land would be eliminated. Grading requirements for the substation site and access road would result in slight erosion and sedimentation for alternate site 1 and high levels of erosion for alternate site 2. The proposed facility would be visible from a local road and several residences. Noise and other disturbances to residents will occur during construction.

  6. GRAMÁTICA FUNCIONAL: DA ORAÇÃO RUMO AO DISCURSO

    Directory of Open Access Journals (Sweden)

    Edson Rosa Francisco de Souza

    2011-01-01

    Full Text Available Este artigo busca apresentar um breve apanhado teórico sobre a Gramática Discursivo-Funcional, começando pelo modelo padrão de Gramática Funcional, desenvolvida por Simon Dik. O objetivo é mostrar a evolução do modelo funcional de Dik para o modelo de Gramática Discursivo Funcional de Hengeveld & Mackenzie (2006, 2008, apresentando-se as definições e as justificativas que embasam a expansão de um modelo funcional focado na oração (Dik, 1989; 1997 para um modelo funcional focado em uma unidade de análise mais ampla (o discurso, na qual as relações entre duas ou mais orações (ou porções de texto maiores são levadas em consideração. Palavras-chave: Funcionalismo; Discurso; Gramática Discursivo-Funcional.

  7. Memoria, funciones ejecutivas y deterioro cognitivo en población anciana

    Directory of Open Access Journals (Sweden)

    Yolanda Clemente

    2015-08-01

    Full Text Available Las funciones cognitivas hacen referencia a las funciones intelectivas o funciones mentales superiores. Suelen ser estos procesos los que primero sufren deterioro cognitivo asociado a la edad. El objetivo del presente estudio fue: analizar el estado de la memoria y las funciones ejecutivas en población anciana con y sin deterioro cognitivo; y comparar el estado cognitivo entre ancianos de un centro de personas mayores y ancianos en sus hogares. Se administró un test de screening para comprobar el nivel de deterioro cognitivo (Mini Examen Cognoscitivo MEC-35, para posteriormente, aplicar el Test de Alteración de Memoria (T@M y el Test de las Anillas. Los participantes fueron 24 sujetos, de los cuales 12 pertenecían a un centro de personas mayores y 12 residían en sus hogares. La edad media de los participantes fue de 78 años. El estudio permitió determinar la relación significativa entre el nivel de deterioro cognitivo y el estado de la memoria y las funciones ejecutivas. El sexo fue indiferente en la variable memoria, pero no en funciones ejecutivas. Finalmente, el hecho de que la persona resida en una institución no mostró diferencias significativas frente a aquellos que residen en sus hogares en cuanto al estado de la memoria y las funciones ejecutivas.

  8. Aproveitamento da macrófita aquática Egeria densa como adubo orgânico Use of aquatic plant (Egeria densa as an organic fertilizer

    Directory of Open Access Journals (Sweden)

    E.V.S.B. Sampaio

    2005-06-01

    Full Text Available Grandes massas de Egeria densa são retiradas dos lagos do sistema hidrelétrico de Paulo Afonso e seu descarte tem sido problemático. O aproveitamento como adubo orgânico foi comparado com o de esterco, em plantio de milho, irrigado, a campo. Foram comparadas as doses de 20 e 40 t ha-1 de matéria seca com testemunha, sem adubo. Paralelamente, foi acompanhada a decomposição do material incorporado ao solo. A massa de E. densa decompôs-se rapidamente, restando menos de um terço após um mês e menos de 1% após dois meses. As adubações com E. densa e esterco incorporaram grande quantidade de nutrientes ao solo e resultaram em produção de grãos de milho (3,5 a 8,5 t ha-1 e palha (4,3 a 8,8 t ha-1 muito maior que a da testemunha (0,3 e 1,2 t ha-1. Em média, as produções com E. densa (grãos, 7,7 t ha-1 foram maiores que as com esterco (4,2 t ha-1, sem diferenças significativas entre doses, possivelmente porque a massa de E. densa libera nutrientes mais rapidamente. Os teores de metais pesados e outros elementos de E. densa ficaram dentro da faixa permitida para adubos orgânicos e não afetaram o milho. O aproveitamento como adubo orgânico parece recomendável.The removal of large masses of Egeria densa out of the lakes of Paulo Afonso hydroelectric plant complex has been problematic. Their use as organic fertilizer was compared to that of cattle manure, in an irrigated corn field. Doses of 20 and 40 t ha-1 of dry matter were compared to a control, without fertilizer. Simultaneously, decomposition of the material in the soil was monitored. The E. densa mass decomposed rapidly, with less than a third remaining after one month and less than 1% after two months. Incorporations with both E. densa and manure added large quantities of nutrients to the soil and resulted in larger grain (3.5 to 8.5 t ha-1 and straw (4.3 to 8.8 t ha-1 productions than those of the control (0.3 and 1.2 t ha-1. Productions with E. densa (grain, 7.7 t ha-1, on

  9. An Approach of the Continuous Electrical State Monitoring by Using the Ground Wire of Neutral Point at Extra-high Voltage Substations : A Preliminary Report

    OpenAIRE

    井筒, 潤; 原田, 誠; 寺山, 武志; 植竹, 富一; 長尾, 年恭

    2009-01-01

    We propose a new monitoring system by using the neutral current of transformers at substations of an electric power company named “neutral current monitoring”. It means that we have been measuring the telluric field by using the power line system in order to monitor the electromagnetic state of the underground over an extended time period. The principle of this system is as follow: the neutral points of the transformers in the substations are grounded to the earth and power lines connect th...

  10. Simulator for training operators of electric substation: an approach via RBC-Paraconsistent; Simulador para treinamento de operadores de subestacao eletrica: um enfoque via RBC-paraconsistente

    Energy Technology Data Exchange (ETDEWEB)

    Lambert-Torres, G.; Martins, H.G.; Coutinho, M.P.; Goulart, J.D.C.; Soares, F.M.A. [Universidade Federal de Itajuba (UNIFEI), MG (Brazil). Dept. de Engenharia Eletrica], Emails: germanoltorres@gmail.com, helgagonzaga@gmail.com, maurilio.coutinho@gmail.com, janaina157@yahoo.com.br, francis.azevedo@gmail.com

    2009-07-01

    This article presents a combination of two techniques applied artificial intelligence to solve problems to Restoration of an Electric Substation: Casebased Reasoning - CBR and the Four Values Annotated Paraconsistent Logic - 4vAPL. The process occurs in the connection functions of belief, disbelief, specialty and temporality to LPA4v in the retrieval of cases to determine process diagnostic of an RBC. The field of CBR is applied in a recovery of an electric substation. The LPA4v is the support applied in problems that have inconsistent information, partials and undefined. Thus this study is closer of the real situations.

  11. Draft Supplement to the Environmental Statement Fiscal Year 1976 Proposed Program : Facility Location Evaluation for Horse Heaven Hills Area Service (Horse Heaven Substation) Study Area 75-7.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1974-10-22

    The proposed plan of service consists of the construction of a new substation near Patterson, Washington. Land requirements for the new substation would be approximately 20 to 22 acres of land depending on the final site location chosen. Access road requirements range from 100 feet for alternative site 4 to 2000 feet for alternative site 2. The proposed facility would remove the land from potential irrigation development and could interfere with irrigation practices on adjacent land. Disturbance to wildlife and elimination of habitat associated with the above land requirements would occur. Soil erosion would result from site and access road grading. This facility would be visible from Washington Highway 14.

  12. Avaliação de novas práticas de compostagem em pequena escala com aproveitamento energético

    Directory of Open Access Journals (Sweden)

    Roberto Guião de Souza Lima Junior

    Full Text Available RESUMO: Foram avaliados neste estudo novos sistemas de compostagem de mínimo impacto ambiental para o tratamento in loco de resíduos orgânicos. Dois tipos de composteiras e quatro formas de manejo foram testados. Focaram-se ainda duas composições de resíduos sólidos orgânicos com relação ao aproveitamento energético por aquecimento de água. Os resíduos mantiveram temperaturas termofílicas por mais de 20 dias, apresentaram produção desprezível de metano e não geraram chorume em condições de aeração passiva. Como aspectos de maior influência, podem ser considerados: a suspensão das composteiras sobre pallets, a composição dos resíduos, as condições de contorno das composteiras e o manejo adotado. No teste de recuperação energética, temperaturas de até 51ºC foram alcançadas após 24 horas de circulação de água no sistema, sugerindo que o processo pode ser uma fonte potencial de economia de energia. O modelo de compostagem proposto é ambientalmente adequado, porque minimiza emissões e geração de lixiviado se comparado a aterros sanitários e plantas de compostagem industrial, sendo indicado para cozinhas industriais, condomínios, shopping centers e outros geradores em pequena e média escalas.

  13. Third Level of International Relations: Characteristics of Sub-State Actors

    Directory of Open Access Journals (Sweden)

    Sergey P. Arteev

    2016-01-01

    Full Text Available The article is in the genre of the review for textbook O. V. Plotnikova and O. Y. Dubrovina International relations of the regions States: characteristics and features (Moscow: Norma; INFRA-M, 2016. 192 p.. Textbook on international activities of sub-state/subnational actors in international relations. Under the sub-state/subnational actors refers to the regions of the States. The authors propose an along with interstate relations (first level and supranational organizations (second level to distinguish a third level of international relations - international relations of the regions in Federal and unitary States. The topic is very relevant due to the ongoing restructuring of the architecture of international relations and world politics. In addition, these processes lead to involvement in international relations new actors. The resulting configuration and the role of traditional players. In addition to long-term evolutionary processes, we should not forget about the position of Russia in the last few years. It is obvious that the current tensions around the Russian Federation may not be fully resolved with the old methods. At the same time, sub-state/ subnational actors as subjects of a combined nature, the role played by regions of the Russian Federation, able to combine harmoniously in its international activities as the techniques characteristic of the traditional actors - States and developments in the tools of non-traditional actors - international non-governmental and non-profit organizations etc. As a result of positive results can be achieved faster and at the interstate level. The review considers the subject and the relevance of the topic, presents the analysis of the content of the work. Marked strengths of the textbook, including those associated with the consideration of the diagonal ties and the political components in the international activities of the regions. In addition to the advantages, attention is paid to the analysis of

  14. Proteína do soro de leite: Aproveitamento e aplicações na produção de embalagem biodegradável

    Directory of Open Access Journals (Sweden)

    R. Ribeiro-Santos

    2015-12-01

    Full Text Available O soro de leite é um resíduo originado da indústria de laticínios, seu descarte é preocupante, considerando o apelo em relação à preservação do meio ambiente. Além disso, as proteínas do soro de leite são desperdiçadas como resíduo podendo, essas, serem utilizadas em diversas aplicações alimentícias devido aos seus e benefícios para a saúde, sendo uma excelente fonte de aminoácidos indispensáveis. O aproveitamento dessas proteínas é sugerido no enriquecimento ou desenvolvimento de novos produtos, inserindo-as na alimentação como uma forma nutritiva e sensorialmente aceita, além de uma alternativa para o gerenciamento do resíduo. Outra forma de aproveitamento dessas proteínas é na elaboração de embalagens de alimentos como os filmes e revestimentos comestíveis. Esses apresentam vantagens como: extensão da validade comercial e melhoria na qualidade nutricional dos alimentos, além disso, atuam na redução às embalagens sintéticas. Desta forma, essa revisão teve como objetivo elucidar as vantagens do aproveitamento do soro lácteo, bem como de suas proteínas, na elaboração ou enriquecimento de alimentos e principalmente na produção de embalagens biodegradáveis. O trabalho foi realizado por meio de uma abordagem qualitativa utilizando consultas a bases de dados nacionais e internacionais. O reaproveitando do soro de leite na elaboração de produtos como: bebidas lácteas, pães, e biscoitos é desejável uma vez os alimentos são nutricionalmente enriquecidos e inclui uma série de benefícios à saúde. E na produção de embalagens as proteínas apresentam vantagens como melhorias de qualidade nutricional e garantia de segurança do alimento, além do fato de poderem ser comestíveis e biodegradáveis.Whey protein: use and application in the production of biodegradable packagingAbstract: The whey is a residue of the dairy industry. The waste of whey is worrying appeal the regarding the preservation of

  15. O humor verbal e o livro didático de língua portuguesa: uma análise do aproveitamento didático do humor

    OpenAIRE

    Claudia Moura da Rocha

    2013-01-01

    Esta tese de doutorado desenvolve considerações a respeito do humor verbal e o seu aproveitamento pedagógico em livros didáticos de Língua Portuguesa. Nosso interesse foi examinar o humor verbal e os mecanismos linguísticos que o provocam, para verificar de que forma foram abordados pelos livros didáticos. Antes de proceder à análise, fizemos breve exposição das principais teorias que estudaram o humor verbal (aquele provocado pelos recursos que a língua oferece). Tratamos também da relevânci...

  16. Occupational exposure to electric and magnetic fields during work tasks at 110 kV substations in the Tampere region.

    Science.gov (United States)

    Korpinen, Leena H; Pääkkönen, Rauno J

    2010-04-01

    The occupational exposure to electric and magnetic fields during various work tasks at seven 110 kV substations in Finland's Tampere region was studied. The aim was to investigate if the action values (10 kV/m for the E-field and 500 microT for the B-field) of the EU Directive 2004/40/EC were exceeded. Electric and magnetic fields were measured during the following work tasks: (1) walking or operating devices on the ground; (2) working from a service platform; (3) working around the power transformer on the ground or using a ladder; and (4) changing a bulb from a man hoist. In work task 2 "working from a service platform" the measured electric field (maximum value 16.6 kV/m) exceeded 10 kV/m in three cases. In the future it is important to study if the limit value (10 mA/m(2)) of Directive 2004/40/EC is exceeded at 110 kV substations. The occupational 500 microT action value of the magnetic flux density field (B-field) was not exceeded in any working situation.

  17. Three-Dimensional Finite-Element Analysis of the Short-Time and Peak Withstand Current Tests in Substation Connectors

    Directory of Open Access Journals (Sweden)

    Francesca Capelli

    2016-05-01

    Full Text Available Power devices intended for high-voltage systems must be tested according to international standards, which includes the short-time withstand current test and peak withstand current test. However, these tests require very special facilities which consume huge amounts of electrical power. Therefore, mathematical tools to simulate such tests are highly appealing since they allow reproducing the electromagnetic and thermal behavior of the test object in a fast and economical manner. In this paper, a three-dimensional finite element method (3D-FEM approach to simulate the transient thermal behavior of substation connectors is presented and validated against experimental data. To this end, a multiphysics 3D-FEM method is proposed, which considers both the connector and the reference power conductors. The transient and steady-state temperature profiles of both the conductors and connector provided by the 3D-FEM method prove its suitability and accuracy as compared to experimental data provided by short-circuit tests conducted in two high-current laboratories. The proposed simulation tool, which was proven to be accurate and realistic, may be particularly useful during the design and optimization phases of substation connectors since it allows anticipating the results of mandatory laboratory tests.

  18. A Traction Three-Phase to Single-Phase Cascade Converter Substation in an Advanced Traction Power Supply System

    Directory of Open Access Journals (Sweden)

    Xiaoqiong He

    2015-09-01

    Full Text Available The advanced traction power supply system (ATPSS is a new directional development for traction power supply systems, which can totally remove the neutral sections and effectively promote power quality. However, the existing converters suffer from small substation capacity. In this paper, a new configuration based on a three-level neutral point clamped (3L-NPC three-phase to single-phase cascade converter in a substation is proposed for ATPSS, which can be used to match the capacity of the converter for high voltage and large power applications. The control strategy of the proposed converter is analyzed in depth, and the phase disposition sinusoidal pulse width modulation (PD-SPWM with phase shift carrier SPWM (PSC-SPWM is employed in the inverters. Then, the inductance equalizing circuit is applied for the voltage balance on the DC-link. Besides, a LC filter circuit is designed to eliminate the double line-frequency ripple of DC voltage. Afterwards, a simulation model and an experimental prototype are developed, respectively. The simulation results show that the proposed converter in this paper can not only meet the requirements of voltage and capacity for the traction network, but also improve power quality. Finally, the experimental results verify the correctness and feasibility of the proposed control strategy.

  19. Selection of the external insulation distance for electric equipment as function of the environmental pollution level; Seleccion de la distancia de aislamiento externo de equipo electrico en funcion del nivel de contaminacion ambiental

    Energy Technology Data Exchange (ETDEWEB)

    Villa Velazquez Santillanes, Francisco [Gerencia de Proyectos Geotermoelectricos de la Comision Federal de Electricidad, Morelia (Mexico)

    1996-09-01

    Geographic, environmental and meteorological conditions, are considered as decisive factors in the basic engineering and design of electric substations. These conditions are considered through the use of environmental and meteorological parameters, such as: pollution type, creepage distance, pollution level, maximum wind rate, maximum temperature, seismic coefficient and maximum pluvial precipitation. In some cases, the pollution level determines the external insulation distance. The pollution level factor is quantified as the equivalent salt accumulation in milligrams per square centimeter of the insulation surface (DESD), occurring during certain time, that produces an electric effect similar to that of the real pollutant. [Espanol] Los aspectos geograficos, ambientales y meteorologicos son factores que se deben considerar en la ingenieria basica de las subestaciones electricas. En el diseno de estas se utilizan parametros asociados con las condiciones ambientales y meteorologicas, como son: tipo de contaminacion, distancia de fuga, nivel de contaminacion, velocidad maxima del viento, temperatura ambiental maxima, temperatura ambiental minima, coeficiente sismico y maxima precipitacion pluvial. La contaminacion se produce por la depositacion de polvo y otras sustencias quimicas sobre los aisladores. Para cuantificar la contaminacion se recurre al concepto de Densidad Equivalente de Sal Depositada (DESD), que consiste en medir la contaminacion en funcion de la cantidad de sal (NaC1) depositada en cierto tiempo, por centimetro cuadrado del aislador, tal que su comportamiento electrico es equivalente al de los contaminantes reales.

  20. Funciones y estructura de ingeniería social del nuevo gobierno local

    National Research Council Canada - National Science Library

    José Vargas Hernández

    2005-01-01

    Este trabajo tiene como objetivo analizar las funciones y estructura de ingeniería social del nuevo gobierno local para dar respuesta a las demandas sociales, promover el desarrollo y regular los nuevos servicios públicos...

  1. Funciones y estructura de ingeniería social del nuevo gobierno local

    National Research Council Canada - National Science Library

    José Vargas Hernández

    2015-01-01

    Este trabajo tiene como objetivo analizar las funciones y estructura de ingeniería social del nuevo gobierno local para dar respuesta a las demandas sociales, promover el desarrollo y regular los nuevos servicios públicos...

  2. Condicion fisica y capacidad funcional en el paciente criticamente enfermo: efectos de las modalidades cineticas

    National Research Council Canada - National Science Library

    Mondragon-Barrera, Monica Alejandra

    2013-01-01

    ...: determinar los efectos de los movimientos pasivos, asistidos, activos y resistidos, sobre la fuerza muscular, movilidad articular y capacidad funcional en pacientes internados en unidad de cuidados intensivos. Metodos...

  3. Envelhecimento ativo e sua relação com a independência funcional

    Directory of Open Access Journals (Sweden)

    Olívia Galvão Lucena Ferreira

    2012-01-01

    Full Text Available El objetivo del presente estudio fue analizar los factores determinantes del envejecimiento activo y su relación con la independencia funcional. La investigación se realizó con 100 personas mayores de una Unidad de Salud de la Familia, en João Pessoa-PB, Brasil. Como instrumentos para la evaluación de personas mayores se utilizó la Medida de Independencia Funcional y un cuestionario sociodemográfico. Los datos fueron analizados a través del software SPSS. Según los resultados, todos los sujetos presentan la independencia funcional para llevar a cabo las actividades analizadas. Los datos también demostraron que la independencia funcional promueve una mayor integración de las personas mayores en la comunidad, mediante el fortalecimiento de los lazos sociales y familiares, de amistad y de ocio, y esos factores se consideran como determinantes del envejecimiento activo.

  4. Una aplicación de las funciones débilmente contractivas a problemas de valor en la frontera de funciones con valores en intervalos

    Directory of Open Access Journals (Sweden)

    Vladimir Angulo-Castillo

    2014-06-01

    Full Text Available Se estudia la existencia y unicidad de soluciones para problemas de valor en la frontera asociadas a ecuaciones diferenciales de funciones con valores en intervalos, usando la derivada de Hukuhara y algunos teoremas de punto fijo de funciones débilmente contractivas definidas en conjuntos parcialmente ordenados. Abstract. We study the existence and uniqueness of solutions for boundary value problems associated to differential equations of interval-valued functions, by using the derivative of Hukuhara and some fixed point theorems for weakly contractive mappings defined on partially ordered sets.

  5. Funciones ejecutivas: unidad-diversidad y trayectorias del desarrollo

    Directory of Open Access Journals (Sweden)

    Esperanza Bausela Herreras

    2014-06-01

    Full Text Available La presente revisión teórica tiene como objetivo profundizar en el estudio del desarrollo de las funciones ejecutivas, en concreto, en el análisis de las trayectorias del desarrollo de las diversas dimensiones que lo integran (inhibición, memoria de trabajo y flexibilidad, según el modelo propuesto por Miyake y colaboradores. Un segundo objetivo es tratar de conocer si en su evolución sigue la forma de una U invertida -con un ascenso inicial, un crecimiento moderado y un descenso con el transcurso de los años-; finalmente, profundizar en posibles líneas de investigación relacionadas con el las trayectorias y mecanismos que se siguen en su desarrollo. Concluimos considerando la importancia de desarrollar estudios con técnicas de neuroimagen que nos permitan completar y seguir ahondando en el estudio de un proceso cognitivo de orden superior que sigue siendo un gran desconocido en los estudios ontogenéticos.

  6. Coordination of voltage and reactive power control in the extra high voltage substations based on the example of solutions applied in the national power system

    Directory of Open Access Journals (Sweden)

    Dariusz Kołodziej

    2012-06-01

    Full Text Available This paper presents examples of coordination between automatic voltage and reactive power control systems (ARST covering adjacent and strongly related extra high voltage substations. Included are conclusions resulting from the use of these solutions. The Institute of Power Engineering, Gdańsk Division has developed and deployed ARST systems in the national power system for a dozen or so years.

  7. The exposure risks to the magnetic field at internal MV/LV substations; Os riscos da exposicao ao campo magnetico em subestacoes internas MT/BT

    Energy Technology Data Exchange (ETDEWEB)

    Keikko, Tommi; Valkealahti, Seppo [Tampere University of Technology (TUT), Tampere (Finland); Paeaekkoenen, Rauno [Finnish Institute of Occupational Health, Lappeenranta (Finland); Seesvuori, Reino [Tampere Power Distribution, Tampere (Finland); Kaennaelae, Sami [Radiation and Nuclear Safety Authority (STUK), Helsinki (Finland)

    2010-10-15

    The risk evaluation due to the magnetic field must be part of the protection concept of health during the work. This paper analyses the worker exposure to magnetic fields in abridged distribution substations, whose values must not surpass the established limits. The real measurements include exposures with measurements synchronous to the load currents and harmonic total distortion among others parameters. (author)

  8. Modeling of a 22.9 kV 50 MVA superconducting power cable based on PSCAD/EMTDC for application to the Icheon substation in Korea

    Science.gov (United States)

    Lee, S.; Yoon, J.; Lee, B.; Yang, B.

    2011-11-01

    Two projects for high temperature superconducting (HTS) power cable have been carried out in Korea since 2001. One of them is a HTS cable project in DAPAS (Development of Advanced Power system by Applied Superconductivity technologies) program funded by the Ministry of Education, Science and Technology. In this project, LS Cable Ltd. (LSC) and Korea Electrotechnology Research Institute (KERI) jointly developed a 22.9 kV, 50 MVA, 3 phase, 100 m HTS cable using first generation (1G) HTS wire in 2006. The HTS cable system has been tested in a power test center of Korea Electric Power Corporation (KEPCO). LSC and KEPCO have been developing a 22.9 kV, 50 MVA, 3 phase, 500 m HTS cable system using second generation (2G) HTS wire since 2008, based on the technology of the DAPAS project. This project is called as GENI (Green Superconducting Electric Power Network at the Icheon Substation) project. The target of GENI project is to install and operate the HTS cable system in the Icheon substation located in near Seoul. In order to analyze the Icheon substation power system employing the HTS cable, an analysis model of the HTS cable is necessary. This paper describes the development of an analysis model for the 22.9 kV, 50 MVA HTS cable that will be applied to the Icheon substation in Korea.

  9. The study for defining the best technical and economical alternatives for the associated substation to the Tucurui hydraulic power plant - second stage; Estudo para definicao da melhor alternativa tecnico-economica para a subestacao elevadora-secionadora associada a Usina Hidroeletrica Tucurui - segunda etapa

    Energy Technology Data Exchange (ETDEWEB)

    Machado Junior, Camilo; Fukuoka, Nita; Rose, Eber Havila [ELETRONORTE, Brasilia, DF (Brazil)]. E-mail: eber@eln.gov.br; Martinez, Manuel Luis Barreira [Escola Federal de Engenharia de Itajuba, MG (Brazil). Inst. de Energia Eletrica. Dept. de Eletrotecnica; Violin, Airton

    2001-07-01

    This document presents a synthesis of the developed study for defining the switching scheme of the associated substation to the Tucurui hydraulic power plant second stage which is being constructed. In order to reduce the short circuit level in the first stage substation (in operation) to suitable values and, at the same time, to maintain the flexibility in the generator and transmission systems, it has been decided to install some series reactors between the substations in 550 Kv. The used methodology to define the suitable alternative is also discussed and the substation final configuration involving the first and second stages of the substation enlargement is presented through a illustration.

  10. Methodology for evaluating the grounding system in electrical substations; Metodologia para la evaluacion del sistema de puesta a tierra en subestaciones electricas

    Energy Technology Data Exchange (ETDEWEB)

    Torrelles Rivas, L.F [Universidad Nacional Experimental Politecnica: Antonio Jose de Sucre (UNEXPO), Guayana, Bolivar (Venezuela)]. E-mail: torrellesluis@gmail.com; Alvarez, P. [Petroleos de Venezuela S.A (PDVSA), Maturin, Monagas (Venezuela)]. E-mail: alvarezph@pdvsa.com

    2013-03-15

    The present work proposes a methodology for evaluating grounding systems in electrical substations from medium and high voltage, in order to diagnose the state of the elements of the grounding system and the corresponding electrical variables. The assessment methodology developed includes a visual inspection phase to the elements of the substation. Then, by performing measurements and data analysis, the electrical continuity between the components of the substation and the mesh ground is verified, the soil resistivity and resistance of the mesh. Also included in the methodology the calculation of the step and touch voltage of the substation, based on the criteria of the International IEEE standards. We study the case of the 115 kV Pirital Substation belonging to PDVSA Oriente Transmission Network. [Spanish] En el presente trabajo se plantea una metodologia para la evaluacion de sistemas de puesta a tierra en subestaciones electricas de media y alta tension, con la finalidad de diagnosticar el estado de los elementos que conforman dicho sistema y las variables electricas correspondientes. La metodologia de evaluacion desarrollada incluye una fase de inspeccion visual de los elementos que conforman la subestacion. Luego, mediante la ejecucion de mediciones y analisis de datos, se verifica la continuidad electrica entre los componentes de la subestacion y la malla de puesta a tierra, la resistividad del suelo y resistencia de la malla. Se incluye tambien en la metodologia el calculo de las tensiones de paso y de toque de la subestacion, segun lo fundamentado en los criterios de los estandares Internacionales IEEE. Se estudia el caso de la Subestacion Pirital 115 kV perteneciente a la Red de Transmision de PDVSA Oriente.

  11. Advances in the diagnosis of substations primary equipment by means of high sensitivity techniques; Avances en el diagnostico de equipo primario de subestaciones mediante tecnicas de alta sensibilidad

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Colon H, V. Rodolfo; Nava G, J. Armando; Azcarraga R, Carlos G [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2005-07-01

    In an electrical system, the substations primary equipment is integrated by the power transformers, the instrument transformers, the breakers and the interconnection circuits (energy cables). At the present time, the described primary equipment has been integrated in an arrangement denominated encapsulated substation that presents dimensional and aesthetic advantages in the conventional substations. Nevertheless, the isolation involved in this type of substations means new challenges when carrying out its diagnosis in a planned way or after the appearance of a fault. In this sense, the insulating and electromechanical system of the primary equipment of substations must be evaluated in a programmed way or be constantly monitored. This with the final purpose of detecting incipient problems that could evolve towards a fault or to the diminution of the electrical system reliability. [Spanish] En un sistema electrico, el equipo primario de subestaciones esta integrado por los transformadores de potencia, los transformadores de instrumento, los interruptores y los circuitos de interconexion (cables de energia). En la actualidad, el equipo primario descrito se ha integrado en un arreglo denominado subestacion encapsulada que presenta ventajas dimensionales y esteticas sobre las subestaciones convencionales. Sin embargo, el aislamiento involucrado en este tipo de subestaciones significa nuevos retos al efectuar su diagnostico de manera planeada o despues de presentarse una falla. En este sentido, el sistema aislante y electromecanico del equipo primario de subestaciones debe ser evaluado de manera programada o monitoreado constantemente. Ello con la finalidad de detectar problemas incipientes que pudieran evolucionar hacia una falla o la disminucion de la confiabilidad del sistema electrico.

  12. ANÁLISE SENSORIAL E NUTRICIONAL DE TORTA SALGADA ELABORADA ATRAVÉS DO APROVEITAMENTO ALTERNATIVO DE TALOS E CASCAS DE HORTALIÇAS

    Directory of Open Access Journals (Sweden)

    P. D. J. SOUZA

    2008-11-01

    Full Text Available

    O aproveitamento integral de hortaliças além de enriquecer a dieta contribui para minimizar o desperdício de alimentos. Foram elaboradas duas tortas com talos de couve- flor e de brócolis e com cascas de cenoura e de beterraba. Os objetivos deste trabalho foram avaliar a aceitabilidade dessas tortas e o teor nutricional das cascas, talos e tortas prontas. A análise sensorial foi realizada por 41 provadores não-treinados. Para a torta com menor teor de talos e cascas, o atributo textura teve nota 8,3 ± 0,9 sendo a mais aceita. Para a torta com maior teor, o sabor foi o atributo mais aceito com nota 8,0 ± 1,6. No teste sensorial, o atributo sabor foi significativamente (P < 0,05 diferente entre as amostras analisadas. A casca de cenoura apresentou 2,1g de proteínas e 1,0g de fibras por 100g. A casca de beterraba apresentou 1,4g de proteínas e 3,1g de fibra por 100g. O talo de couve flor apresentou 0,9 g de proteínas e 2,8g de fibras por 100g. O talo de brócolis apresentou 1,5g de proteínas e 4,0g de fibras por 100g. A análise dos resultados permitiu verificar que os talos e as cascas podem ser boas fontes de nutrientes e que as tortas preparadas apresentam teores importantes de nutrientes e fibras. Além disso, através da análise sensorial foi possível verificar a boa aceitação das tortas em relação ao sabor, aparência, textura e cor.

  13. Avaliação funcional de pessoas com lesão medular: utilização da escala de independência funcional - MIF

    Directory of Open Access Journals (Sweden)

    Gelson Aguiar da Silva

    2012-01-01

    Full Text Available La lesión de la médula espinal generalmente tiene el traumatismo como causa, originando serias molestias en el individuo, su familia, y sociedad. Es grave problema de salud pública. El objetivo de este trabajo fue investigar la ganancia funcional para personas con paraplejia traumática, participantes de un programa de rehabilitación, a través de la aplicación de la Escala de Medida de Independencia Funcional. Se trata de un estudio transversal retrospectivo, cuantitativo y descriptivo, con análisis de 228 registros. Se utilizó el programa Statistical Package for Social Science, versión 13 para Windows, con determinadas pruebas estadísticas. Los resultados muestran que la ganancia funcional promedio se produjo en todas las categorías de cuidado del cuerpo, control de esfínteres, traslado, caminar y escaleras. De este estudio se concluye que la rehabilitación promueve mejoras en la independencia funcional es fundamental para la recuperación y la independencia para las personas con lesión de la médula espinal.

  14. A New Approach to Detection of Systematic Errors in Secondary Substation Monitoring Equipment Based on Short Term Load Forecasting.

    Science.gov (United States)

    Moriano, Javier; Rodríguez, Francisco Javier; Martín, Pedro; Jiménez, Jose Antonio; Vuksanovic, Branislav

    2016-01-12

    In recent years, Secondary Substations (SSs) are being provided with equipment that allows their full management. This is particularly useful not only for monitoring and planning purposes but also for detecting erroneous measurements, which could negatively affect the performance of the SS. On the other hand, load forecasting is extremely important since they help electricity companies to make crucial decisions regarding purchasing and generating electric power, load switching, and infrastructure development. In this regard, Short Term Load Forecasting (STLF) allows the electric power load to be predicted over an interval ranging from one hour to one week. However, important issues concerning error detection by employing STLF has not been specifically addressed until now. This paper proposes a novel STLF-based approach to the detection of gain and offset errors introduced by the measurement equipment. The implemented system has been tested against real power load data provided by electricity suppliers. Different gain and offset error levels are successfully detected.

  15. A New Approach to Detection of Systematic Errors in Secondary Substation Monitoring Equipment Based on Short Term Load Forecasting

    Directory of Open Access Journals (Sweden)

    Javier Moriano

    2016-01-01

    Full Text Available In recent years, Secondary Substations (SSs are being provided with equipment that allows their full management. This is particularly useful not only for monitoring and planning purposes but also for detecting erroneous measurements, which could negatively affect the performance of the SS. On the other hand, load forecasting is extremely important since they help electricity companies to make crucial decisions regarding purchasing and generating electric power, load switching, and infrastructure development. In this regard, Short Term Load Forecasting (STLF allows the electric power load to be predicted over an interval ranging from one hour to one week. However, important issues concerning error detection by employing STLF has not been specifically addressed until now. This paper proposes a novel STLF-based approach to the detection of gain and offset errors introduced by the measurement equipment. The implemented system has been tested against real power load data provided by electricity suppliers. Different gain and offset error levels are successfully detected.

  16. Two-step high-resolution laser spectroscopy of the Stark substates of the n = 33 level in atomic hydrogen

    Energy Technology Data Exchange (ETDEWEB)

    Delsart, C.; Cabaret, L.; Blondel, C.; Champeau, R.J.

    1987-09-28

    Two synchronised pulsed single-mode tunable laser systems are used to excite atomic hydrogen in an atomic beam. A vacuum ultraviolet laser populates first the 2p /sup 2/Psub(3/2) sublevel from the ground 1s/sup 2/Ssub(1/2) state. A second-step UV laser selects substates of the n = 33 manifold in the presence of a weak electric field. Stark patterns of this manifold are recorded for different polarisation configurations of the exciting light beams. The measured relative intensities of the Stark components agree with the theoretical excitation probabilities in the two-step process, calculated to the first order of perturbation theory. Varying the field value of the ionisation field pulse also makes it possible to plot the ionisation threshold against the parabolic quantum number in the n = 33 manifold. The results agree with an asymptotic formula of ionisation probabilities for hydrogen perturbed by an electric field.

  17. Testing and start up of equipment in a substation; Pruebas y puesta en servicio del equipo de una subestacion

    Energy Technology Data Exchange (ETDEWEB)

    Raull-Martin, J. [Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

    2001-09-01

    The purpose of this paper is to present a summarized version of the test series required to determine out the final condition of the isolations, the continuity of the control circuits, as well as protection, measurement, sing-positing, alarms and the total substation performance. [Spanish] El proposito de este articulo es presentar en forma compacta la serie de pruebas que se requieren para determinar el estado final de los aislamientos, la continuidad de los circuitos de control, proteccion, medicion, senalizacion, alarmas, asi como el funcionamiento del conjunto de la subestacion. Se muestra una grafica K-Temperatura y de conexiones para las pruebas con megger. Se muestra un diagrama de conexiones para determinar las marcas de polaridad este tipo bushing e interruptores; asi como para el faseo de una proteccion diferencial. Se da el diagrama de faseo interno y energizado por el lado de 23 kV de una subestacion de 230 kV.

  18. Força de membros inferiores como indicador de incapacidade funcional em idosos

    Directory of Open Access Journals (Sweden)

    Rafaela G. dos Santos

    2013-09-01

    Full Text Available O propósito deste estudo foi discriminar a quantidade de repetições no teste sentar e levantar da cadeira na estimativa da incapacidade funcional. Estudo epidemiológico de corte transversal com amostra probabilística de 622 indivíduos, idade > 60 anos. A capacidade funcional autopercebida foi analisada como variável dicotômica: ausência de dependência versus dependência na realização de atividade básicas (ABVD e instrumentais da vida diária (AIVD. Aplicou-se o teste sentar e levantar da cadeira durante 30 segundos (número de repetições máximas para avaliar a força de membros inferiores. O teste mostrou-se como discriminador da incapacidade funcional devido os valores apresentados pelas áreas sob as curvas ROC serem >0,60. O ponto de corte para determinar a incapacidade funcional nas ABVD foi < 10 repetições (homens e < 9 repetições (mulheres; nas AIVD < 14 repetições (homens e < 10 repetições (mulheres. A força de membros inferiores pode ser utilizada como preditor da incapacidade funcional nas ABVD e AIVD.

  19. Las funciones conservadora, cultural, educativa y ocio de los archivos

    Directory of Open Access Journals (Sweden)

    Enrique Pérez Herrero

    2013-10-01

    Full Text Available Estas líneas pretenden demostrar el cambio radical que ha sufrido el concepto de archivo. En la actualidad no se concibe el archivo únicamente como un centro de custodia de documentos merecedores de ser conservados. Además de esta primigenia finalidad, el archivo ha ido adquiriendo con el transcurso del tiempo otras funciones como son la cultural, la educativa y, por qué no, también la del ocio. Estos centros han pasado de ser meros contenedores de documentos a laboratorios de historia; de ser puntos de consulta de escasos lectores, a puntos de lectura empleados por usuarios de muy diversa índole; de ser lugares de pura investigación, a lugares de estudio, de cultura y de ocio. Antaño los archivos eran centros estáticos, cerrados, aislados unos de otros, carentes de interés por atraer a nuevos usuarios. Al presente, tanto han cambiado que es difícil equiparar ambas etapas, pues todo archivo que se precie de serlo ha de ser dinámico, abierto, relacionados entre sí, preocupado en atraer nuevos investigadores y usuarios, mecanizado con las más modernas herramientas que agilicen la búsqueda de información y beneficiarios de un marketing de captación de nuevos usuarios y de evaluación de resultados.This article intends to demonstrate the radical change suffered by the concept of archives. Archives are no longer conceived only as a centre for conserving worthy documents. Apart from this original purpose, archives have taken on other functions over the years, like a cultural, educational and, perhaps, a leisure function. These centres have changed from being a mere container of documents, into history laboratories; from being a consultation centre for a few readers, to become reading points used by users of all kinds; from being sites of pure research, to become places for study, culture and leisure. Archives used to be closed, isolated and static places, with no interest in attracting new users. Things have now changed so much that

  20. ¿Pueden mejorarse las funciones ejecutivas en adultos jóvenes?

    Directory of Open Access Journals (Sweden)

    María Jesús Maraver

    2017-10-01

    Full Text Available Al igual que un controlador aéreo regula el funcionamiento de un ajetreado aeropuerto, las funciones ejecutivas son el sistema de control de nuestro comportamiento, permitiéndonos planificar y regular nuestras acciones (motoras o cognitivas, realizar múltiples tareas y recordar sólo aquella información que es relevante. Teniendo en cuenta su importancia, han sido muchos los intentos de demostrar si las funciones ejecutivas se pueden entrenar. En nuestro trabajo investigamos el efecto de dos tipos de entrenamiento de las funciones ejecutivas y demostramos que sí es posible mejorarlas. Además, comprobamos que una mayor motivación durante el entrenamiento está asociada a mayores mejoras.

  1. Las funciones racionales a través de su descomposición

    OpenAIRE

    Collel, Agustín

    2004-01-01

    En las matemáticas del bachillerato, la representación gráfica de funciones racionales suele abordarse como un caso más de la representación general de funciones, aunque con una atención especial en el cálculo de las asíntotas. Para el cálculo de primitivas de funciones racionales se usa la descomposición de las mismas en fracciones simples. Se trata aquí de aplicar esta descomposición en la representación gráfica haciendo mención de las ventajas sobre el método que generalmente se suele usar...

  2. Caracterização do óleo das sementes de Pachira aquatica Aublet para aproveitamento alimentar Characterization of seed oil Pachira aquatica Aublet for food utilization

    Directory of Open Access Journals (Sweden)

    Neuza Jorge

    2012-03-01

    Full Text Available Os frutos de Pachira aquatica Aublet apresentam sementes comestíveis com características organolépticas muito apreciadas pelas populações amazônicas, sendo pouco utilizados em outras regiões. Este trabalho teve como objetivo caracterizar as sementes quanto à composição centesimal e determinar as características físico-químicas e perfil de ácidos graxos. A determinação da composição centesimal das sementes (teores de umidade, lipídios, proteínas, cinzas e carboidratos e análises do óleo extraído das mesmas (ácidos graxos livres, índices de peróxido, iodo, refração, saponificação, ponto de fusão e perfil de ácidos graxos foram realizadas seguindo metodologia oficial. O teor de óleo nas sementes 38,39% demonstrou que estas têm potencial para aproveitamento industrial. Das características físico-químicas analisadas, o óleo extraído das sementes apresentou 39,2% de ácidos graxos livres (expresso em % ácido oleico, índice de iodo de 27,4 g I2.100 g-1, índice de saponificação de 208,0 mg.KOH g-1, índice de refração (40 °C de 1,4569 e ponto de fusão de 41,9 °C. Quanto à composição de ácidos graxos do óleo predominaram os ácidos palmítico (44,93%, oleico (39,27% e linoleico (11,35%. Tal fato favorece o uso deste óleo como matéria-prima para as indústrias alimentícia, farmacêutica e de cosméticos.The fruits of Pachira aquatica Aublet present edible seeds with organoleptic characteristics much appreciated by peoples in the Amazon, with little being used in other regions. This study aimed to characterize the seeds and to determine the composition and physicochemical characteristics and fatty acid profile. Determining the composition of the seeds (moisture, lipids, proteins, carbohydrates and ash and analysis of oil extracted from them (free fatty acids, peroxide, iodine, refractive index, saponification value, melting point and fatty acid profile was performed following the official methodology

  3. Valoración funcional del adulto mayor relacionado con el abandono familiar.

    Directory of Open Access Journals (Sweden)

    Jenny Fernanda Villarroel Vargas

    2017-03-01

    Full Text Available Introducción: Se estima que entre el 2000 al 2050 la población mundial envejecida ascenderá del 11% al 22 %, con ello el incremento de las diversas enfermedades o trastornos propios de la edad. Objetivo: Establecer la relación entre capacidad funcional del adulto mayor con el abandono familiar en el barrio La Calera Centro, Latacunga, 2015-2016. Métodos: Se realizó un estudio observacional descriptivo de corte trasversal, donde previo consentimiento informado participaron 70 adultos mayores, a quienes se les aplicó escalas para valoración de la capacidad funcional, así como la encuesta para valorar abandono familiar y aspectos sociodemográficos de la población. Para el análisis estadístico se utilizó el test de Chi Cuadrado de Pearson con un nivel de significancia del 0,05. Resultados: Se reportó el abandono en el 75,7% de los adultos mayores y tuvo significancia con respecto a la capacidad funcional y la estructura familiar (p=0,002. Hubo relación  entre capacidad funcional y abandono familiar, así como también predominio de los adultos mayores entre los 65 a 74 años, sexo femenino, sin ninguna actividad laboral y analfabetos. Hubo relación significativa entre capacidad funcional, edades geriátricas y ocupación; y de igual manera entre la estructura familiar y el abandono. La capacidad funcional y la estructura familiar fueron factores asociados al abandono.    Conclusiones: La dependencia del adulto mayor condicionó a diferentes tipos de maltrato, destacando el abandono familiar.

  4. Potencial energético e alternativas para o aproveitamento do biogás e lodo de reatores UASB: estudo de caso Estação de tratamento de efluentes Laboreaux (Itabira

    Directory of Open Access Journals (Sweden)

    André Pereira Rosa

    Full Text Available RESUMO: Este trabalho estuda o potencial de aproveitamento energético dos subprodutos biogás e lodo gerados na estação de tratamento de efluentes (ETE Laboreaux em Itabira (MG, composta de reatores UASB, filtros biológicos percoladores e unidade de desaguamento do lodo por filtro prensa. Os subprodutos biogás e lodo foram caracterizados em termos quantitativos (produção e qualitativos (composição e poder calorífico durante 12 meses de monitoramento. Foram estudados dois cenários de aproveitamento energético dos subprodutos: (i uso prioritário do biogás para a secagem térmica do lodo e o excedente de biogás para geração de eletricidade em motor de combustão interna; e (ii uso prioritário do biogás visando à geração de eletricidade e ao aproveitamento do calor dos gases de exaustão para a secagem térmica de lodo. Para a análise desses cenários, utilizou-se o software CHEMCAD(r a fim de determinar as condições de queima do biogás em câmara de combustão e em motor de combustão interna, assim como na determinação dos balanços de massa e energia. O estudo analisou o potencial de aproveitamento dos subprodutos do tratamento como fonte de energia renovável para uso na própria ETE e para fornecimento a terceiros. No cenário 1, a geração de eletricidade é menor (atendendo 22,2% da demanda de energia da ETE, mas a secagem térmica possibilita maior redução no volume final de lodo a ser disposto ou a eliminação completa de disposição final se o lodo seco final (com 10% de umidade for utilizado como combustível por terceiros. No cenário 2, a geração de eletricidade é capaz de suprir 57,6% da demanda de energia da ETE, todavia o calor contido nos gases de exaustão não é suficiente para a secagem de todo o lodo desaguado, configurando uma menor redução na quantidade de lodo a ser disposto (13,5 ou 24,9% de redução em massa, conforme a alternativa de remoção de umidade selecionada.

  5. Viabilidade técnica de implantação de sistema de aproveitamento de água pluvial para fins não potáveis em universidade

    OpenAIRE

    Salla, Marcio Ricardo; Lopes, Gabriela Bernardi; Pereira, Carlos Eugênio; Moura Neto, João da Costa; Pinheiro, Aline Martins

    2013-01-01

    Este artigo tem como objetivo analisar a viabilidade técnica de implantação de sistema de aproveitamento de águas pluviais para fins não potáveis em uma edificação com salas de aula e anfiteatros na Universidade Federal de Uberlândia, no município de Uberlândia. Dois tipos de análise foram realizadas: sob o ponto de vista quantitativo, verificando se a quantidade de água pluvial coletada supre satisfatoriamente a demanda por água não potável; e sob o ponto de vista qualitativo, verificando se...

  6. Tucurui`s 500 kV S F{sub 6} gas-insulated substation modeling for fast transients - field tests comparison

    Energy Technology Data Exchange (ETDEWEB)

    Lima Filho, Joao Ferreira de; Pazo Blanco, Flavio A.F.; D`Ajuz, Ary; Nascimento, Lidio F.A. [ELETRONORTE, Brasilia, DF (Brazil)

    1994-12-31

    Many problems in insulation, devices and equipment have been resulted from switching operations in the 500 kV Gas-Insulated Substation (GIS) of Tucurui power plant. Disconnector closing or opening action can subject the GIS components to great stresses from excessive voltages at high frequencies caused by successive reflections of travelling waves at discontinuities (1,2,3). Field tests were carried out in September 18-23, 1991 to verify the actual GIS stresses at Tucurui. From these results simulations on the Alternative Transients Program (ATP) were performed in order to check the substation modeling. This paper presents and discusses the Tucurui GIS modeling for switching fast transients and its field test validation. (author) 8 refs., 6 figs.

  7. Draft Supplement to the Environmental Statement Fiscal Year 1976 Proposed Program : Facility Location Evaluation for Yale Service (Raft Substation), Study Area 75-10.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1974-10-22

    The statement describes the environmental impacts resulting from the construction of a new substation near Yale, Idaho, approximately 22 miles from Burley, Idaho. Land requirements for the new substation would be approximately 2 acres and an access road less than 100 feet in length would also be required. Depending on the final site location chosen, 2 acres of cropland (Alternatives 1 and 2) or 2 acres of grassland (Alternative 3) would be taken out of production. Disturbance of wildlife during construction and loss of habitat associated with the land requirements described above would occur. Some soil erosion as a result of grading will occur and increased runoff and sedimentation into the Raft River may occur. The facility would be visible from I-15 and Raft River Road.

  8. Draft Supplement to the Environmental Statement Fiscal Year 1976 Proposed Program : Facility Location Evaluation for West Burley Substation Study Area 75-9.

    Energy Technology Data Exchange (ETDEWEB)

    United States. Bonneville Power Administration.

    1974-10-22

    The statement describes the environmental impacts resulting from the construction of a new substation near Burley, Idaho. Land requirements for the new substation would be approximately 1 acre of land and, depending on the final site location chosen, 100 to 300 feet of access road would also be required. Alternate site 1 would remove approximately 1 acre of potential industrial land; alternate site 2, 1 acre of irrigated cropland; and alternate site 3, 1 acre of marginal pastureland. Wildlife will be disturbed during the construction and habitat associated with the above land requirements will be removed. There would be erosion associated with the site and access road grading and a slight potential for sedimentation in local streams. Alternate site 1 would be visible from US Highway 30 and several local residences.

  9. Las funciones ejecutivas cálidas y el rendimiento académico

    OpenAIRE

    García Arias, María de los Ángeles

    2012-01-01

    El objetivo principal de esta investigación es estudiar la contribución de las funciones ejecutivas y los rasgos de la personalidad al rendimiento académico de los alumnos de 4º de Primaria y analizar las relaciones que hay entre ellos. La novedad del estudio es contar con la variable neuropsicológica toma de decisiones y estudiar su correlación con el rendimiento, así como destacar la evaluación ecológica de las funciones ejecutivas, es decir su medida en la vida diaria, como un método de m...

  10. Secuelas en las funciones ejecutivas posteriores al traumatismo craneoencefálico en el adulto.

    OpenAIRE

    Maura Jazmín Ramírez Flores; Feggy Ostrosky-Solís

    2009-01-01

    Las funciones cognitivas, entre ellas las ejecutivas (FE), después de un traumatismo craneoencefálico (TCE) presentan alteraciones, que afecta la vida cotidiana de los pacientes. El propósito del estudio fue evaluar las funciones ejecutivas de pacientes adultos con TCE moderado y severo, para conocer las características neuropsicológicas distintivas de la intensidad de la lesión. Participaron 26 pacientes, 10 con TCE Moderado (edad=34.80±14.45; escolaridad= 15.20±2.525 años); y 16 con TCE Sev...

  11. Funciones de sobrevivencia empleadas en el análisis demográfico

    OpenAIRE

    Alejandro Mina Valdés

    2001-01-01

    El manejo de las funciones de sobrevivencia tipo Gompertz y tipo Makeham son presentadas a partir de su origen, considerando sus antecedentes, así como la determinación de los parámetros de cada una de éstas, empleando para ello el método de los grupos no superpuestos, comunmente utilizado en ciencias actuariales. También se presenta el método iterativo que permite depurar, logrando un mejor ajuste, los resultados obtenidos, lo que permite proyectar los parámetros de las funciones de sobreviv...

  12. Funciones del coordinador/a TIC : estudio de caso en un centro de la capital onubense

    OpenAIRE

    Rodríguez Miranda, Francisco de Paula

    2005-01-01

    En este artículo comenzamos ofreciendo una definición de coordinador/a TIC. Seguidamente analizamos cuáles son sus funciones, extraídas de nuestro estudio de casos desarrollado en un centro público de educación infantil y primaria (centro TIC) en la capital onubense. Para finalizar ofrecemos una biopsia sobre las funciones más relevantes del coordinador/a TIC, teniendo en cuenta las opiniones del equipo docente del colegio y del resto de sus compañeros en la coordinación TIC de...

  13. Relación entre las Funciones Ejecutivas y Control Emocional

    OpenAIRE

    Aguilar-González, Alberto

    2013-01-01

    Actualmente el estudio de las Funciones Ejecutivas está cobrando mayor relevancia como sistema superior de control de la conducta, ya que de éstas depende desde el control de la atención, la flexibilidad cognitiva, la toma de decisiones, la impulsividad, la monitorización, etc., es por ello que se hace pertinente y oportuno relacionar estas funciones con las emociones y su control. Este trabajo pretende analizar el grado de relación entre las actividades fundamentales de la ...

  14. Esguince de ligamento lateral externo. Inmovilización vs tratamiento funcional

    OpenAIRE

    Martínez de la Vallina, Miriam

    2013-01-01

    El objetivo de este trabajo es evaluar la efectividad de los métodos de inmovilización para las lesiones agudas del ligamento lateral del tobillo y comparar la inmovilización con métodos de tratamiento funcional. Métodos: Se ha realizado la búsqueda en el registro especializado de Pubmed y Dynamed. Resultados: Por un lado, 21 ensayos con 2184 participantes. Se encontraron diferencias estadísticamente significativas a favor del tratamiento funcional en comparación con la inmoviliza...

  15. A prevalência de incapacidade funcional em idosos no Brasil

    OpenAIRE

    Parahyba, Maria Isabel; Simões,Celso Cardoso da Silva

    2006-01-01

    O processo de envelhecimento brasileiro tende a se intensificar nas próximas décadas, de tal forma que, em 2050, projeta-se um número absoluto de idosos em torno de 64 milhões. Considerando que os estudos internacionais vêm apontando redução do declínio funcional entre os idosos nos países desenvolvidos, este estudo tem por finalidade analisar como vêm ocorrendo as mudanças na incapacidade funcional dos idosos, no Brasil, segundo alguns indicadores sociodemográficos selecionados. Foram utiliz...

  16. Influencia del nivel y de la actividad escolar en las funciones ejecutivas

    OpenAIRE

    Julio César Flores Lázaro; Bibiana Tinajero Carrasco; Bertha Castro Ruiz

    2011-01-01

    El efecto de la escolaridad sobre el desempeño neuropsicológico ha sido ampliamente descrito excepto para las pruebas de funciones ejecutivas. En la actualidad más del 70% de la población mundial presenta un nivel educativo medio-bajo, por lo que es indispensable contar con el conocimiento sobre las características de desempeño en pruebas de funciones ejecutivas en este tipo de población; de forma que se pueda conocer y comprender sus características cognitivas. En este trabajo se analizó el ...

  17. Batería luria inicial y desarrollo de las funciones psicológicas superiores

    OpenAIRE

    Yaser Ramírez Benítez

    2014-01-01

    La batería neuropsicológica Luria Inicial es un instrumento válido para evaluar y seguir el desarrollo de las funciones psicológicas superiores en la edad preescolar. El modelo neuropsicológico de Luria ofrece la posibilidad para conocer las funciones superiores del niño. Metodología: La investigación pretende determinar la utilidad clínica del instrumento Luria Inicial en la población cubana preescolar con alteraciones del neurodesarrollo. El objetivo se cumplió con la revisión de los trabaj...

  18. Las funciones trigonométricas seno y coseno a partir de sus aplicaciones

    OpenAIRE

    Sánchez Vásquez, Héctor Javier

    2014-01-01

    El presente trabajo muestra una propuesta didáctica para el aprendizaje significativo de las funciones trigonométricas Seno y Coseno a partir de problemas experimentales, de tal manera que el estudiante descubra dichas funciones a través de sus aplicaciones. En particular se consideran problemas relacionados con el movimiento circular uniforme y las ondas mecánicas. Para tal efecto, se hace uso de la tecnología, en particular del programa Geogebra y del osciloscopio digital. Es de anotar, ...

  19. Estado funcional y mortalidad en pacientes neoplásicos hospitalizados

    OpenAIRE

    Degiorgi, C.; Salomón, Susana Elsa; Mosso, Marcelo; Carena, José Alberto

    2009-01-01

    Objetivos: Analizar el estado funcional y su relación con morbimortalidad en pacientes con neoplasias internados en Cínica Médica. Material y métodos: Estudio descriptivo, protocolizado y observacional. Se analizaron variables clínicas, estado funcional, situación anímica y morbimortalidad en pacientes oncológicos hospitalizados y se compararon pacientes con Índice de Karnofsky <40 puntos (grupo A) y >40 puntos (grupo B). Los datos fuero...

  20. La diferenciabilidad de las funciones de varias variables. Una propuesta de tratamiento metodológico

    OpenAIRE

    Gómez, Pablo Ignacio; Delgado, Juan Raúl

    2012-01-01

    La diferenciabilidad de funciones de varias variables y sus relaciones con otras propiedades locales no son tratadas suficientemente en los cursos de Cálculo en carreras de ingeniería. El presente trabajo recoge los resultados del análisis documental, las observaciones realizadas y la metodología empleada, así como una propuesta de tratamiento metodológico de este importante concepto que sistematiza el concepto homónimo en funciones de una variable y la construcción de un sistema de conceptos...

  1. Seismic damage in the electrical substations of the Colima state; Dano sismico en las subestaciones electricas del estado de Colima

    Energy Technology Data Exchange (ETDEWEB)

    Mena H, Ulises; Lopez L, Alberto; Guerrero F, Vicente A. [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2004-07-01

    On the 21 of January of 2003, at 20:06:36 hrs (Mexico center time) an earthquake occurred at the Pacific coast with a magnitude of 7.6 degrees in the Richter scale, whose epicenter was located near the state of Colima and it was felt in a large extent of the Mexican Republic. The earthquake caused numerous material damages in the structures (houses, churches, offices, etc) and vital lines, mainly in the infrastructure of the electrical sector of the region, leaving without electrical energy a large part of the nearby populations and some colonies of distant zones such as in Mexico City. The cause of the interruption of the electrical energy was due to the collapse of some of the equipment of 400 and 230 KV of the electrical transmission substations, among which are Manzanillo II and Colima II. With the experience acquired in the earthquake of October 9, 1995 in Manzanillo, in which also the facilities and equipment of the electrical substations were affected considerably, and as a part of the infrastructure project on the analysis of seismic risk of vital lines that is being developed at this moment at the Instituto de Investigaciones Electricas (IIE), it was decided to inspect the electrical substations of the zone, where the greater damages in the facilities and equipment were reported, to analyze and to determine the main causes of their failure. [Spanish] El 21 de enero de 2003, a las 20:06:36 hrs (hora del centro de Mexico) ocurrio un sismo en la costa del Pacifico con una magnitud de 7.6 grados en escala Richter, cuyo epicentro se localizo cerca del estado de Colima y se percibio en gran parte de la republica mexicana. El sismo causo cuantiosos danos materiales en las estructuras (viviendas, iglesias, oficinas, etc) y lineas vitales, principalmente en la infraestructura del sector electrico de la region, dejando sin energia electrica a gran parte de las poblaciones cercanas y algunas colonias de zonas lejanas como es la ciudad de Mexico. La causa del corte de

  2. System for the design of electrical distribution substations; Sistema para el diseno de subestaciones electricas de distribucion

    Energy Technology Data Exchange (ETDEWEB)

    Zayas Perez, Benjamin Eddie; Islas Perez, Eduardo; Bahena Rada, Jessica Liliana; Romero Lima, Jesus [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Sierra Rodriguez, Benjamin; Moreno Diaz, Humberto [Comision Federal de Electricidad (Mexico)

    2011-07-01

    The physical design of electric substations involves a variety of activities, such as developing, reviewing and performing modifications to different design proposals, estimating costs and producing documents to be integrated into an executive project. These activities are usually conducted at the Distribution Divisions of the Federal Electric Commission (CFE) through two separate processes: the development of engineering plans with computer-aided design software (CAD) and volumetric calculations for the initial budget using conventional spreadsheets. The documents are manually developed on an individual basis, without the existence of any functions to allow for automatically updating the design modifications of any of the plans. The corresponding initial budget becomes a lengthy and laborious process with the likelihood of inconsistencies among the documents. In order to optimize the design process for the public and electromechanical works of electric substations (ES) in a three-dimensional (3D) graphic environment, the IIE's Management of Process Supervision, in coordination with the CFE Distribution Subdivision, developed the System for the Design of Electric Substation Distribution (SDESD). This system makes use of the advantages of CAD3D technology to develop detail engineering, cost engineering to calculate initial budgets and virtual reality for three-dimensional interactive navigation. It is worth mentioning that this system is currently in the implementation phase at the CFE Distribution Subdivision. This article briefly describes the main stages in the development of the project, as well as the functioning and principal components of the system. [Spanish] El diseno fisico de subestaciones electricas implica una variedad de actividades, tales como elaborar, revisar y efectuar modificaciones de diferentes propuestas de diseno, estimar costos y producir documentos, para integrarlos como parte de un proyecto ejecutivo. Estas actividades usualmente se

  3. Algorithms for the evaluation of the reliability of networks and substations; Algoritmos para evaluar la confiabilidad de redes y subestaciones electricas

    Energy Technology Data Exchange (ETDEWEB)

    Vega Ortiz, Miguel [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2001-07-01

    Two algorithms are presented, one for analyzing the reliability of networks and another one to analyzing the reliability of electrical substations. The algorithms model a network or a substation by means of a graph and determine all the exits, of up to third degree, which isolates the load points. The algorithm that is used for the network analysis, is the one of p-cuts and in the case of the substations it is the one of minimum ways, for later, from these minimum p-cuts and of the minimum ways, obtains the minimum cuts. These minimum cuts are evaluated with the approximate method and give as a result the system reliability and of each one of the components that have been modeled. At the end some examples and results obtained are shown. As case of study, the algorithm is applied to two substations arrangements and to a network of industrial distribution, but it is possible to be applied to transmission and distribution networks. [Spanish] Se presentan dos algoritmos, uno para analizar la confiabilidad de redes y otro para analizar la confiabilidad de subestaciones electricas. Los algoritmos modelan una red o una subestacion por medio de un grafo y determinan todas las salidas, de hasta tercer grado, que aislan los puntos de carga. El algoritmo que se utiliza para el analisis de redes, es el de p-cortes y en el caso de las subestaciones es el de caminos minimos, para despues, a partir de estos p-cortes minimos y de los caminos minimos, obtener los cortes minimos. Estos cortes minimos se evaluan con el metodo aproximado y dan como resultado la confiabilidad del sistema y de cada una de las componentes que se hayan modelado. Al final se muestran algunos ejemplos y resultados obtenidos. Como caso de estudio, el algoritmo se aplica a dos arreglos de subestaciones y a una red de distribucion industrial, pero se puede aplicar a redes de transmision y de distribucion.

  4. A Comparative Study of Electric Load Curve Changes in an Urban Low-Voltage Substation in Spain during the Economic Crisis (2008–2013)

    Science.gov (United States)

    Lara-Santillán, Pedro M.; Mendoza-Villena, Montserrat; Fernández-Jiménez, L. Alfredo; Mañana-Canteli, Mario

    2014-01-01

    This paper presents a comparative study of the electricity consumption (EC) in an urban low-voltage substation before and during the economic crisis (2008–2013). This low-voltage substation supplies electric power to near 400 users. The EC was measured for an 11-year period (2002–2012) with a sampling time of 1 minute. The study described in the paper consists of detecting the changes produced in the load curves of this substation along the time due to changes in the behaviour of consumers. The EC was compared using representative curves per time period (precrisis and crisis). These representative curves were obtained after a computational process, which was based on a search for days with similar curves to the curve of a determined (base) date. This similitude was assessed by the proximity on the calendar, day of the week, daylight time, and outdoor temperature. The last selection parameter was the error between the nearest neighbour curves and the base date curve. The obtained representative curves were linearized to determine changes in their structure (maximum and minimum consumption values, duration of the daily time slot, etc.). The results primarily indicate an increase in the EC in the night slot during the summer months in the crisis period. PMID:24895677

  5. A Comparative Study of Electric Load Curve Changes in an Urban Low-Voltage Substation in Spain during the Economic Crisis (2008–2013

    Directory of Open Access Journals (Sweden)

    Pedro M. Lara-Santillán

    2014-01-01

    Full Text Available This paper presents a comparative study of the electricity consumption (EC in an urban low-voltage substation before and during the economic crisis (2008–2013. This low-voltage substation supplies electric power to near 400 users. The EC was measured for an 11-year period (2002–2012 with a sampling time of 1 minute. The study described in the paper consists of detecting the changes produced in the load curves of this substation along the time due to changes in the behaviour of consumers. The EC was compared using representative curves per time period (precrisis and crisis. These representative curves were obtained after a computational process, which was based on a search for days with similar curves to the curve of a determined (base date. This similitude was assessed by the proximity on the calendar, day of the week, daylight time, and outdoor temperature. The last selection parameter was the error between the nearest neighbour curves and the base date curve. The obtained representative curves were linearized to determine changes in their structure (maximum and minimum consumption values, duration of the daily time slot, etc.. The results primarily indicate an increase in the EC in the night slot during the summer months in the crisis period.

  6. Examples of occupational exposure to electric and magnetic fields at 110-kV gas-insulated substations (GISs).

    Science.gov (United States)

    Korpinen, Leena; Pääkkönen, Rauno

    2015-02-01

    The objectives of the study were to present examples of occupational exposure to electric and magnetic fields at gas-insulated substations (GISs) and to analyse the exposure according to the new European Directive 2013/35/EU. The aim was also to describe the details of the measurements of this study at GISs. Electric and magnetic fields were measured (45 measurements in total) at two GISs in the Tampere region of Finland. Inside the GISs, magnetic field values varied from 0.4 to 43.0 µT, and electric fields from 5 to 90 V m(-1). In the cable room of GIS B, the maximum value was 250 µT (very near the cables). The values did not exceed the low or high action levels of the new Directive 2013/35/EU. In conclusion, it can be stated that at 110-kV GISs, workers are not exposed to electromagnetic fields (EMFs) higher than the new European Directive 2013/35/EU. © The Author 2014. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  7. General and Simple Decision Method for DG Penetration Level in View of Voltage Regulation at Distribution Substation Transformers

    Directory of Open Access Journals (Sweden)

    Joon-Ho Choi

    2013-09-01

    Full Text Available A distribution system was designed and operated by considering unidirectional power flow from a utility source to end-use loads. The large penetrations of distributed generation (DG into the existing distribution system causes a variety of technical problems, such as frequent tap changing problems of the on-load tap changer (OLTC transformer, local voltage rise, protection coordination, exceeding short-circuit capacity, and harmonic distortion. In view of voltage regulation, the intermittent fluctuation of the DG output power results in frequent tap changing operations of the OLTC transformer. Thus, many utilities limit the penetration level of DG and are eager to find the reasonable penetration limits of DG in the distribution system. To overcome this technical problem, utilities have developed a new voltage regulation method in the distribution system with a large DG penetration level. In this paper, the impact of DG on the OLTC operations controlled by the line drop compensation (LDC method is analyzed. In addition, a generalized determination methodology for the DG penetration limits in a distribution substation transformer is proposed. The proposed DG penetration limits could be adopted for a simplified interconnection process in DG interconnection guidelines.

  8. Educación inclusiva y diversidad funcional en la Universidad

    OpenAIRE

    Martín, Ernesto; Sarmiento, Pedro José; Yarime, Luz

    2013-01-01

    Este artículo tiene como fin describir los elementos básicos requeridos para facilitar una educación inclusiva en la superior para las personas con necesidades educativas especiales, desde la perspectiva de la diversidad funcional.

  9. Evaluación funcional en ancianos intervenidos de fractura de cadera

    Directory of Open Access Journals (Sweden)

    Silvia Montalbán-Quesada

    2012-10-01

    Full Text Available Estudio observacional prospectivo en pacientes mayores de 65 años intervenidos de fractura de cadera. El objetivo fue conocer la evolución funcional de los pacientes a los tres meses del alta hospitalaria, identificar variables relacionadas con dicha recuperación funcional, describir la mortalidad e institucionalización asociadas al proceso. Se analizaron variables demográficas como edad, sexo, convivencia. Otros aspectos registrados fueron: comorbilidad, deterioro cognitivo, capacidad para caminar, nivel de dependencia según índice de Barthel, institucionalización y mortalidad. Se recogió la información al ingreso y a los 3 meses del alta. El 89,6% de la muestra, fueron mujeres, la edad media fue de 83,56 años. El 40% de los pacientes recuperaron la independencia previa registrándose una mortalidad del 16,7% así como una leve progresión hacia la institucionalización. La capacidad funcional y el deterioro cognitivo del paciente, previos a la fractura condicionan su recuperación funcional y dependencias posteriores.

  10. Algoritmos de Programación Funcional sobre árboles

    OpenAIRE

    Gallardo López, Domingo

    2013-01-01

    En estos vídeos podrás conocer algoritmos recursivos para la construcción y procesamiento de árboles usando el paradigma de Programación Funcional. Usamos el lenguaje de programación Scheme y demostramos el funcionamiento de los algoritmos con ejemplos concretos.

  11. Externalización De Funciones: Algunas Reflexiones Teóricas

    Directory of Open Access Journals (Sweden)

    Francisco Ganga Contreras

    2008-04-01

    También se aborda el origen del outsourcing, algunas diferencias conceptuales, sus principales ventajas y riesgos, además de incluir una revisión a la situación actual de la externalización de funciones en Chile.

  12. Uma visão geral da gramática funcional

    Directory of Open Access Journals (Sweden)

    Maria Helena de Moura Neves

    2001-02-01

    Full Text Available

    O trabalho apresenta uma visão geral do que vem sendo chamado funcionalismo em lingüística. Contrapõem-se os modelos formalista e funcionalista e examinam-se, em especial, as propostas de gramática funcional de C. S. Dik e de M. A. K. Halliday.

  13. Segmentation of planar surfaces in LiDAR point clouds of an electrical substation by exploring the structure of points neighbourhood

    Science.gov (United States)

    Arastounia, M.; Lichti, D. D.

    2014-06-01

    According to the Department of Energy of the USA, today's electrical distribution system is 97.97% reliable. However, power outages and interruptions still impact many people. Many power outages are caused by animals coming into contact with the conductive elements of the electrical substations. This can be prevented by covering the conductive electrical objects with insulating materials. The design of these custom-built insulating covers requires a 3D as-built plan of the substation. This research aims to develop automated methods to create such a 3D as-built plan using terrestrial LiDAR data for which objects first need to be recognized in the LiDAR point clouds. This paper reports on the application of a new algorithm for the segmentation of planar surfaces found at electrical substations. The proposed approach is a region growing method that aggregates points based on their proximity to each other and their neighbourhood dispersion direction. PCA (principal components analysis) is also employed to segment planar surfaces in the electrical substation. In this research two different laser scanners, Leica HDS 6100 and Faro Focus3D, were utilized to scan an electrical substation in Airdrie, a city located in north of Calgary, Canada. In this research, three subsets incorporating one subset of Leica dataset with approximately 1.7 million points and two subsets of the Faro dataset with 587 and 79 thousand points were utilized. The performance of our proposed method is compared with the performance of PCA by performing check point analysis and investigation of computational speed. Both methods managed to detect a great proportion of planar points (about 70%). However, the proposed method slightly outperformed PCA. 95% of the points that were segmented by both methods as planar points did actually lie on a planar surface. This exhibits the high ability of both methods to identify planar points. The results also indicate that the computational speed of our method is

  14. NEW APPROACHES TO MAINTENANCE AND REPAIRING OF THE TRACTION SUBSTATIONS EQUIPMENT ON ELECTRIFIED RAILWAYS ON THE BASIS OF SMART-TECHNOLOGIES

    Directory of Open Access Journals (Sweden)

    O. O. Matusevich

    2014-06-01

    Full Text Available Purpose. At the stage of modernization and reconstruction of electrified railroads in Ukraine one should take into account the innovative development level of all electric supply subjects on the basis of advanced technologies. Determination the ways to increase the power supply reliability of electrified railways and reducing the accidents of the traction substation power equipment (TS. Methodology. For attainment a goal it’s studied the international experience on qualitative power supply of the electrical railways at the basis of the ideology of Smart Grid. It’s conducted a research of the major methods of technical servicing, repairing (TS and R and diagnostics the traction substation devices of electrified railways. Findings. As a result of research it was concluded that the basis of the new methods of maintenance and repearing is analysis of the risks of operation of the weared equipment or equipment with some defects (maintenance of equipment on the basis of the actual technical condition. It’s also concluded that the conceptual definitions of Smart Grid point to the important role of smart grid technology to the economic development of the electrical system. Significant world experience of maintenance and repairing at the basis of the actual technical state shows the following general assessment of the effectiveness of this method: reducing maintenance costs by 75%, reducing the number of services up to 50%, reduction the number of failures by 70% in the first year. Originality. As a research and improvement result of the maintenance and repairing system of traction substations, the author has proposed the concept of maintenance and repairing intelligent system, monitoring and diagnostic of technical process equipment. The basic components of the system are proposed. It’s proposed a maintenance of the equipment of traction substation at the actual technical state with better resource parameters. In the normative document for

  15. Qualidade de vida, nível cognitivo e desempenho escolar em crianças portadoras de distúrbio funcional do trato urinário inferior

    Directory of Open Access Journals (Sweden)

    Lorenna Andrade Veloso

    2016-06-01

    Full Text Available Resumo Introdução: Distúrbios do Trato Urinário Inferior (DTUI de causa funcional são disfunções vesicais sem defeitos anatômicos ou neurológicos. O diagnóstico é principalmente clínico, com sintomas padronizados pela International Children's Continence Society. Poucos estudos relacionam qualidade de vida destes pacientes ao nível cognitivo e aproveitamento escolar. Objetivos: Avaliar marcos do controle miccional, dificuldades cotidianas, qualidade de vida (QV, nível cognitivo e desempenho escolar de crianças portadoras de DTUI. Método: Série de casos de pacientes acompanhados na Nefrologia Pediátrica de hospital terciário com avaliação da QV (Pediatric Quality of Life Inventory - Peds-QL, Teste de Desempenho Escolar (TDE e teste de matrizes progressivas de Raven. Resultados: Meninas de classe social menos favorecida foram 90,9% das crianças elegíveis. A média de idade foi 9,1 ± 4,8 anos. Os sintomas mais frequentes foram urge-incontinência (81%, manobras de contenção (77,3% e enurese (59,1% associados à síndrome do distúrbio de eliminações (63,6%. Cuidadores consideravam as perdas urinárias e/ou sintomas como voluntários, brigavam e/ ou batiam na criança. As crianças já tinham sido submetidas a situações constrangedoras e advertências de professores, escondiam sintomas e/ou roupas sujas. O escore médio de QV foi 71,0 ± 12,6 com menor média na dimensão escolar. No TDE 55% tiveram desempenho inferior e nas Matrizes de Raven 60% estavam intelectualmente em nível médio. Observaram-se escores menores de QV no nível médio e inferior do TDE e capacidade intelectual média/abaixo da média nas Matrizes de Raven. Conclusão: DTUI pode influenciar negativamente relações familiares e sociais, desempenho escolar e qualidade de vida das crianças portadoras.

  16. Relação familiar da pessoa idosa com comprometimento da capacidade funcional

    Directory of Open Access Journals (Sweden)

    Luana Araújo dos Reis

    2015-01-01

    Full Text Available Objetivo: comprender la relación familiar de la persona adulta con comprometimiento de la capacidad funcional. Materiales y mé - todos: estudio exploratorio y descriptivo de abordaje cualitativo, fundamentado en el método de la historia oral, realizado con 15 adultos mayores asistidos por una unidad de salud de la familia, residentes con familiares y que presentaban comprometimiento de la capacidad funcional. Se recolectaron los datos en el período de marzo y abril del 2012, por medio de entrevistas en profundidad. Las categorías temáticas fueron: buena relación familiar, cambios en la relación familiar, sintiéndose un estorbo para la familia, sintiéndose abandonado por la familia. Resultado: el estudio ha revelado que las personas mayores con comprometimiento de la capacidad funcional vivencian sentimientos diversos que van desde la alegría porque son respetadas y tienen sus necesidades atendidas, hasta la tristeza y revuelta, por la adaptación negativa de la familia y el abandono de los hijos. Conclusión: la relación familiar de la persona mayor pasa por reajustes luego del comprometimiento de la capacidad funcional, lo que repercute significativamente en la dinámica de las relaciones. Desde esta comprensión, los profesionales de salud, sobre todo de enfermería, deben reconocer los retos a los que la familia afronta, orientarla y capacitarla para la atención a las demandas de cuidado presentadas por la persona mayor con comprometimiento de la capacidad funcional, y favorecer la realización del cuidado sin que esto desgaste las relaciones.

  17. Funciones ejecutivas: nociones del desarrollo desde una perspectiva neuropsicológica

    Directory of Open Access Journals (Sweden)

    Esperanza Bausela Herreras

    2014-06-01

    Full Text Available Desde la perspectiva del desarrollo podemos observar como los niños van siendo cada más capaces de controlar por sí mimos sus propias acciones, respuestas y regular su propia conducta (autorregulación de la conducta o como pasan de una moral heterónoma a una moral autónoma. Esta capacidad de autorregulación de la conducta va ligada al desarrollo de procesos cognitivos de orden superior (memoria de trabajo, planificación, inhibición de respuestas automáticas..., relacionados todas ellos con un mismo constructo, Funciones ejecutivas. El objetivo de este artículo es analizar cómo se ha conceptualizado este constructo, centrándonos en uno de las paradojas que ha dominado la literatura en la última década. Desde esta perspectiva se consideran las Funciones ejecutivas como una unidad y al mismo tiempo integrada por una diversidad de funciones independientes. Esbozaremos, de forma más concreta, las líneas generales del modelo jerárquico propuesto por Miyake y colaboradores. Para estos autores las tres dimensiones que integran las Funciones ejecutivas son: flexibilidad atencional, control inhibitorio y memoria de trabajo. En coherencia con este modelo, analizamos el sustrato neurológico en el que se sustentan. Finalmente, comparamos diferentes teorías del desarrollo de las Funciones ejecutivas con el modelo jerárquico propuesto por Miyake y colaboradores.

  18. Sewerage Treatment Plants, File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer plants, sewer pumpstations, water plants, water tanks http://www.harfordcountymd.gov/gis/Index.cfm, Published in 2011, 1:600 (1in=50ft) scale, Harford County Government.

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — Sewerage Treatment Plants dataset current as of 2011. File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer...

  19. Sewerage Pumping Stations, File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer plants, sewer pumpstations, water plants, water tanks http://www.harfordcountymd.gov/gis/Index.cfm, Published in 2011, 1:600 (1in=50ft) scale, Harford County Government.

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — Sewerage Pumping Stations dataset current as of 2011. File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer...

  20. Water Treatment Plants, File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer plants, sewer pumpstations, water plants, water tanks http://www.harfordcountymd.gov/gis/Index.cfm, Published in 2011, 1:1200 (1in=100ft) scale, Harford County Government.

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — Water Treatment Plants dataset current as of 2011. File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer...

  1. Water Pumping Stations, File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer plants, sewer pumpstations, water plants, water tanks http://www.harfordcountymd.gov/gis/Index.cfm, Published in 2011, 1:1200 (1in=100ft) scale, Harford County Government.

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — Water Pumping Stations dataset current as of 2011. File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer...

  2. Funciones de los partidos en la Web 2.0 propuesta de herramientas de medición de las funciones de los partidos políticos en redes sociales

    OpenAIRE

    Samper Ortegón, Alain

    2016-01-01

    Las redes sociales, y en general la Web 2.0, ofrecen a los partidos políticos nuevas alternativas para el cumplimiento de sus funciones tanto políticas como sociales. El presente trabajo desarrolla una propuesta de medición para evaluar el cumplimiento de las funciones de los partidos a través de las redes sociales. En ese sentido explora las funciones de los partidos políticos para determinar cuales se pueden ejecutar desde los servicios de redes sociales. Este trabajo resulta importante par...

  3. The influence of using heat storage with PCM on inlet and outlet temperatures in substation in DHS

    Science.gov (United States)

    Nogaj, Kinga; Turski, Michał; Sekret, Robert

    2017-11-01

    The main objective of this article is to indicate the direction of development of new generation heating systems that use phase change materials, and the important criteria needed when choosing a phase change material. The work contains a detailed classification of materials using the latent heat of organic and inorganic PCM. This references the technical possibilities of existing heat storage technologies. A specific objective was adopted to determine the effect of using heat storage with PCM on inlet and outlet temperatures in substation in district heating systems. The scope of the study included determining the parameters of the heat distribution network as a function of an outdoor air temperature within the range of -20°C to + 12°C. The object of analysis was chosen to be the heating system parameters: supply 120°C and return 60°C. It is located on the surface of 160km2, and supplies heat to 240,000 residents. The total length of the district heating network is 170 km. Based on the study, it was found that the most advantageous material that accumulates heat depends on the return temperature in the heating network. For the above analyzed case, the return temperature was in the range of 46°C to 57°C. The analysis showed that the most preferred materials using heat of phase change, have possible applications in heating networks and received a return temperature including salt hydrates, such as MgSO4·7H2O and Na2S2O3·5H2. The introduction of stored heat for the district heating system with the phase change material in the form of salt hydrates, allows the return temperature in the district heating to remain at temperatures compatible with the adopted regulatory table for temperatures outside the standard heating season.

  4. Incapacidade funcional entre as mulheres idosas no Brasil Disability among elderly women in Brazil

    Directory of Open Access Journals (Sweden)

    Maria Isabel Parahyba

    2005-06-01

    Full Text Available OBJETIVO: Estimar as taxas de incapacidade funcional e identificar os fatores sociodemográficos associados com a prevalência de incapacidade funcional entre as mulheres idosas. MÉTODOS: As estimativas das taxas de incapacidade funcional foram produzidas com informações da Pesquisa Nacional por Amostra de Domicílios, de 1998, realizada pelo Instituto Brasileiro de Geografia e Estatística. O estudo analisou a população de mulheres idosas, num total de 16.186. Foram elaborados modelos de regressão logística, utilizando como variável dependente a dificuldade para caminhar 100 metros. RESULTADOS: A prevalência de incapacidade funcional leve, moderada e severa foi maior entre as mulheres, e aumentou com a idade. Na análise de regressão logística, os indicadores mais fortemente associados com o aumento da prevalência de incapacidade funcional foram baixo nível de educação e baixo rendimento familiar. Residência rural foi também associada com redução de prevalência. CONCLUSÕES: Os resultados sugerem possíveis fatores de risco para o desenvolvimento de declínio funcional em idosas, tendo em vista que as associações encontradas foram consistentes com aquelas reportadas por outros estudos.OBJECTIVE: To estimate disability rates and explore associations, identifying the most significant socioeconomic markers associated with the prevalence of mobility disability among elderly women. METHODS: National mobility disability rates were estimated based on information from the 1998 National Household Survey (PNAD, conducted by the Instituto Brasileiro de Geografia e Estatística. The present study analyzes the elderly women population, totaling 16,186 subjects. Logistic regression models were constructed considering 'difficulty walking 100 meters' as the dependent variable. RESULTS: The prevalence of markers of mild, moderate and severe disability was greater among women, and increased with age. In logistic regression analysis, markers

  5. Aproveitamento de nutrientes e de energia da ração de codornas japonesas em postura com o uso de fitase Nutrient and energy utilization from the feedings of laying Japanese quails by using phytase

    Directory of Open Access Journals (Sweden)

    Heder José D'Avila Lima

    2010-07-01

    Full Text Available O experimento foi realizado para avaliar o efeito da adição de fitase no aproveitamento dos ingredientes da ração para codornas. Foram utilizadas 200 codornas japonesas fêmeas com 251 dias de idade, peso médio de 187,2 ± 6,0 g e taxa de produção de ovos de 84,8%, distribuídas em delineamento inteiramente casualizado com quatro dietas experimentais e cinco repetições de dez aves por unidade experimental. As dietas experimentais consistiram de uma ração basal à base de milho e farelo de soja, formulada para atender às exigências nutricionais das codornas e às recomendações da matriz da fitase, suplementada com 0, 200, 400 ou 600 unidades de fitase (uf/kg. Utilizando-se o método de coleta total de excretas, foram determinados os valores de matéria seca ingerida, matéria seca excretada, energia metabolizável aparente (EMA, energia metabolizável aparente corrigida pela retenção de nitrogênio (EMAn e os coeficientes de metabolizabilidade da energia corrigida ou não pelo balanço de nitrogênio. Foi calculada também a quantidade de fósforo, cálcio e nitrogênio retido por ave/dia. De maneira geral, houve melhora no aproveitamento da energia das rações com a suplementação de fitase. Os níveis de 195 e 186 uf/kg resultaram em maior aproveitamento da EMA e EMAn. Não houve diferença na retenção de fósforo e cálcio. O nível de 600 (uf/kg promove menor excreção de nitrogênio, porém o de 368 uF/kg é suficiente para máxima retenção de nitrogênio pelas codornas.This experiment was conducted to evaluate the effect of phytase addition on the use of feeding ingredients for laying quails. It was used 200 female Japanese quails at 251 days of age at an average weight of 187.2 ± 6.0 g and egg production rate of 84.8%. The quails were distributed in a complete random design with four experimental diets and five repetitions of ten birds per experimental unity. The experimental diets were consisted of corn and

  6. Aproveitamento de nitrogênio pelo milho, em razão da adubação verde, nitrogenada e fosfatada Nitrogen utilization by corn as affected by green manures and nitrogen and phosphorus fertilizers

    Directory of Open Access Journals (Sweden)

    Edson Cabral da Silva

    2009-02-01

    Full Text Available O objetivo deste trabalho foi avaliar o aproveitamento, pelo milho (Zea mays L., do nitrogênio (N proveniente da ureia, de restos culturais da crotalária (Crotalaria juncea e do milheto (Pennisetum glaucum, e do solo, em função da adubação nitrogenada e fosfatada. O experimento foi conduzido em casa de vegetação, em vasos com 5 kg de solo (Latossolo Vermelho distroférrico. Utilizou-se o delineamento inteiramente ao acaso, com 32 tratamentos e 4 repetições, dispostos em esquema fatorial 4x4x2. Os tratamentos consistiram da combinação de quatro doses de N, na forma de ureia - 0, 0,75, 1,50 e 2,25g por vaso (com ou sem marcação com 15N; quatro doses de P, na forma de superfosfato triplo - 0, 0,175, 0,350 e 0,700g por vaso; e dois tipos de adubo verde, com ou sem marcação com 15N - crotalária e milheto, com adição de matéria seca equivalente a 1 g de N por vaso. Foram avaliados a produtividade de matéria seca, a quantidade de N acumulado e o aproveitamento do N pelo milho. O fertilizante mineral forneceu a maior parte do N acumulado nas plantas de milho, seguido pelo N do solo e de adubos verdes. O aproveitamento do N proveniente da crotalária, pelo milho, foi maior que o do N do milheto. A aplicação de fósforo aumentou a assimilação do N proveniente da ureia e de adubos verdes.The objectives of this work were to evaluate corn (Zea mays nitrogen (N utilization from the green manure crops sunnhemp (Crotalaria juncea and millet (Pennisetum glaucum L. and from urea, and to calculate the contribution of soil N to the mineral nutrition of corn, as affected by nitrogen and phosphorus mineral fertilizers. The experiment was conducted in a greenhouse, in pots with 5 kg of soil (Rhodic Hapludox. The experimental design was completely randomized, with 32treatments and four replicates, in a 4x4x2 factorial array. The treatments were combinations of four N rates as urea: 0, 0.75, 1.50 and 2.25g N per pot (labeled or not with 15N

  7. Modelagem matemática para o aproveitamento da biomassa residual de colheita da cana-de-açúcar com menor custo Mathematical modeling for sugarcane residual biomass exploitation with minimum cost

    Directory of Open Access Journals (Sweden)

    Gilmar Tolentino

    2007-01-01

    Full Text Available O palhiço derivado da colheita de cana-de-açúcar crua, com a redução gradativa das queimadas nos canaviais, tornou-se foco para os pesquisadores e produtores. As vantagens no recolhimento, na recuperação e no aproveitamento têm mobilizado pesquisadores de universidades, gerentes e diretores de usinas, interessados em encontrar a maneira mais produtiva, econômica e eficaz de realizar esse processo. O recolhimento do palhiço é feito em quatro estágios: primeiro o palhiço é enleirado, depois passado por uma máquina de compactação, posteriormente, acondicionado no caminhão e, finalmente, transportado para o centro de processamento. O estudo da viabilidade de aproveitamento desse resíduo para a geração de energia pode ser feito com base no custo e no balanço de energia, ou seja, a energia gerada por essa biomassa menos a energia consumida no processo. Neste trabalho, é proposto o uso de técnicas matemáticas para auxiliar na escolha das variedades da cana-de-açúcar a serem plantadas a fim de otimizar o balanço de energia da biomassa residual de colheita e minimizar o custo de coleta dessa biomassa do campo para o centro de produção, além de satisfazer as principais necessidades da usina.With the gradual reduction in harvest burning, the straw derived from raw sugarcane harvest has become a focal point for researchers and producers alike. The advantages of retrieving, recovering and using this straw have motivated university researchers and sugar mill managers and directors to find the most productive, economic and efficient way to carry out such process. The retrievement of the straw is done in four phases: first it is joined and later bundled by a compacting machine, it is then loaded into trucks and finally transported to the processing center. The feasibility of using this residue in order to generate energy is linked to the cost and the energy balance, that is, the difference between energy generated by the biomass

  8. Factores físicos y mentales asociados con la capacidad funcional del adulto mayor, Departamento de Antioquia, 2012

    National Research Council Canada - National Science Library

    Carolina Cortes Muñoz; Doris Cardona Arango; Angela Marìa Segura Cardona; Marìa Osley Garzòn Duque

    2016-01-01

      Objetivo Describir los factores demográficos, sociales, de la salud física y mental asociados a la capacidad funcional de los adultos mayores del Departamento de Antioquia en el año 2012. Materiales...

  9. Funciones neurobiologicas y neuropsicologicas afectadas en pacientes con enfermedad de Alzheimer: implicaciones y consecuencias en la calidad de vida

    National Research Council Canada - National Science Library

    Parra-Bolanos, Nicolas; Fernandez-Medina, Juliana M; Martinez-Restrepo, Oscar A

    2014-01-01

    .... La EA ataca y dana severamente el Sistema Nervioso Central (SNC), produciendo alteraciones irreversibles en la funcion ejecutiva y en todos los procesos psicologicos superiores y motores, afectando la Calidad de Vida (CV...

  10. PROPUESTA METODOLÓGICA PARA DESARROLLAR UN PROGRAMA CON PROGRAMACIÓN ESTRUCTURADA A PARTIR DEL PARADIGMA FUNCIONAL

    National Research Council Canada - National Science Library

    Omar Iván Trejos Buriticá

    2013-01-01

    ... este artículo se plantea una metodología para el desarrollo de programas que se basa en la programación estructurada, pero tomando como base los conceptos centrales del Paradigma Funcional para su desarrollo...

  11. Reflexiones sobre las funciones jurisdiccionales de la Superintendencia Financiera de Colombia

    Directory of Open Access Journals (Sweden)

    Jorge Armando Corredor-Higuera

    2016-01-01

    Full Text Available El propósito de este artículo consiste en identificar y analizar las principales características relacionadas con la Delegatura para Funciones Jurisdiccionales de la Superintendencia Financiera de Colombia. Para tal efecto, se determinarán las posibles problemáticas en lo corres - pondiente a la constitucionalidad de dichas funciones judiciales, el contenido y alcance de éstas, el desarrollo jurisprudencial que ha tenido la Delegatura a la fecha en lo correspondiente a la teoría del riesgo creado y cómo éste ha impactado en el entendimiento que existía en Colombia en materia de responsabilidad civil de las instituciones financieras y, finalmente, una reflexión sobre la protección precontractual de los consumidores financieros por parte de la citada Delegatura.

  12. La F1F0 ATP sintasa: un complejo proteico con gran versatilidad estructural y funcional

    Directory of Open Access Journals (Sweden)

    Lenin Domínguez-Ramírez

    2005-01-01

    Full Text Available El pirofosfato pudo haber sido la molécula acarreadora de energía precursora del ATP en la atmósfera primigenia. Durante la evolución, el ATP sustituyó al pirofosfato mostrando una mayor versatilidad funcional. Paralelamente, los sistemas encargados de su síntesis o hidrólisis, H+ pirofosfatasas, ATPasas y la ATP sintasa mitocondrial, fueron mostrando mayor complejidad estructural y diversificado funcionalmente utilizando parte de sus componentes estructurales para realizar funciones diferentes de la síntesis o hidrólisis del ATP. Estos hallazgos han revolucionado el campo de la bioenergética tradicional y abierto nuevos caminos a la investigación de procesos normales y patológicos.

  13. FUNCIONES DEL DIRECTOR Y SU RELACIÓN CON LA CAPACITACIÓN DEL DOCENTE

    Directory of Open Access Journals (Sweden)

    Rómulo J Rondón C.

    2000-09-01

    Full Text Available El propósito de esta investigación fue determinar la relación entre las funciones administrativas de los directores y el nivel de capacitación del docente para atender los problemas de lecto-escritura. Los datos recopilados se analizaron con las técnicas cuantitativas de categorización y distribución de frecuencias: 1. Análisis descriptivo porcentual, 2. Construcción de índices y coeficientes, 3. Análisis de asociación. Los resultados revelaron un bajo nivel en las funciones administrativas, expresadas en un coeficiente de 33 por ciento, mientras que el índice de capacitación alcanzó un nivel de 31 por ciento, que refleja la falta de dominio del docente, de las habilidades conceptuales, técnico y humanístico del aprendizaje.

  14. Funciones de sobrevivencia empleadas en el análisis demográfico

    Directory of Open Access Journals (Sweden)

    Alejandro Mina Valdés

    2001-01-01

    Full Text Available El manejo de las funciones de sobrevivencia tipo Gompertz y tipo Makeham son presentadas a partir de su origen, considerando sus antecedentes, así como la determinación de los parámetros de cada una de éstas, empleando para ello el método de los grupos no superpuestos, comunmente utilizado en ciencias actuariales. También se presenta el método iterativo que permite depurar, logrando un mejor ajuste, los resultados obtenidos, lo que permite proyectar los parámetros de las funciones de sobrevivencia, obteniendo tablas abreviadas de mortalidad por grupos quinquenales de edad tanto para los hombres como para las mujeres en México, a nivel nacional, para los años 1995, 2000, 2005 y 2010. Finalmente, se presentan las ganancias en las esperanzas por edad entre los años 1995 y 2010.

  15. Método para construir gráficos de funciones sin el uso de derivadas

    OpenAIRE

    Luis Alberto Escalona-Fernández; José Ramón Velázquez-Codina

    2012-01-01

    Se elaboró un método para determinar los extremos locales, intervalos de convexidad, puntos de inflexión de funciones racionales y la resolución de problemas de optimización, el cual constituye una novedad científica, no solo desde el punto de vista matemático sino también de la Didáctica. Se estudian las propiedades topológicas de estas funciones. La generalización del método incluye la determinación de puntos de inflexión, sin el uso de límites y derivadas; no se utilizan las condiciones ne...

  16. Filogenia y desarrollo de funciones ejecutivas/ Phylogeny and executive functions development

    Directory of Open Access Journals (Sweden)

    Diego Alejandro Calle Sandoval

    2017-06-01

    Full Text Available El presente documento reflexiona acerca del valor filogenético que tiene para la especie humana el desarrollo de la corteza prefrontal y las funciones ejecutivas. Dicho análisis parte de la revisión de estudios empíricos sobre la génesis de estas en la infancia y la patología de las mismas durante el desarrollo, así como de las evidencias etológicas y paleoantropológicas del proceso de hominización. Igualmente, se discute en el artículo la forma como estas funciones neuropsicológicas le permiten al homo sapiens compensar su carácter biológico de inmadurez y falta de especialidades anatómicas.

  17. Tests and putting in service of the equipment of a power substation; Pruebas y puesta en servicio del equipo de una subestacion

    Energy Technology Data Exchange (ETDEWEB)

    Raull Martin, J. [Facultad de Ingenieria, UNAM, Mexico, D.F. (Mexico)

    2001-09-01

    The purpose of this paper is to present a summarized version of the test series required to determine out the final condition of the isolations, the continuity of the control circuits, as well as protection, measurement, sign-posting; alarms and the total substation performance. [Spanish] El proposito de este articulo es presentar en forma compacta la serie de pruebas que se requieren para determinar el estado final de los aislamientos, la continuidad de los circuitos de control, proteccion, medicion, senalizacion, alarmas, asi como el funcionamiento del conjunto de la subestacion.

  18. New conceptual design for offshore wind power substations; Nuevo diseño conceptual de subestación eólica marina

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-07-01

    The presentation of the new offshore wind power substation project, Marin-el, took place last December at an event held at the Higher School of Naval Engineering (ETSIN), part of the Universidad Politécnica de Madrid (UPM). The project is headed up by Iberdrola and backed by the Government of the Basque Country with a project consortium featuring the participation of the Tecnalia technological centre and the Construcciones Navales del Norte (La Naval) shipyard among other firms from the naval and renewable energies sectors. (Author)

  19. Um ponto de vista funcional sobre a predicação

    Directory of Open Access Journals (Sweden)

    Ataliba Teixeira de Castilho

    2001-02-01

    Full Text Available

    O texto relata o desenvolvimento do Projeto de Gramática do Português Falado, discute a predicação no quadro da gramática funcional e apresenta alguns resultados da análise de advérbios e adjetivos predicativos no português culto falado no Brasil, com base nos materiais do Projeto NURC.

  20. Vulnerabilidad sísmica del componente organizativo y funcional de grandes hospitales

    Directory of Open Access Journals (Sweden)

    Nelson Morales-Soto

    2008-04-01

    Full Text Available Las comunidades viven confiadas en la seguridad física y funcional de los hospitales particularmente en las situaciones de desastres, hoy conocemos las debilidades que estos pueden ocultar. En este artículo se revisan los efectos de los terremotos sobre los hospitales, el desarrollo del concepto de hospital seguro y los estudios de vulnerabilidad sísmica de hospitales en el Perú.

  1. Funciones ejecutivas en programa de alfabetización con preescolares

    OpenAIRE

    Di Stefano, Diana Leonor

    2016-01-01

    Las funciones ejecutivas (F.E.) son un conjunto de procesos mentales que permiten anticipar y establecer metas para planificar nuestras conductas y adaptarlas al contexto. La evidencia científica ha planteado que las F.E. son fundamentales para el aprendizaje, por lo cual es necesario promover su desarrollo desde el preescolar, dado que el cerebro presenta en esta etapa una mayor plasticidad.

  2. Cuantificación del deterioro funcional durante seis meses en pacientes renales en estadio terminal

    Directory of Open Access Journals (Sweden)

    Lucía Ortega Pérez de Villar

    2015-12-01

    Full Text Available Introducción: Los pacientes en tratamiento de diálisis presentan una disminución de la función física, sin embargo, no hay estudios que demuestren el ritmo al que se produce este deterioro funcional. El objetivo principal es cuantificar el deterioro funcional de los pacientes en tratamiento de diálisis durante seis meses. Métodos: 43 pacientes en tratamiento de diálisis de dos centros de Valencia (España (edad 61.3 (14.7 años fueron analizados después de 6 meses. Los participantes completaron el Short Physical Performance Battery, equilibrio monopodal, el Timed Up and Go Test, Sit to stand to Sit Test 10 y 60, dinamometría de mano; elevación de talón y 6 minutos marcha. Además se recogieron datos de las historias clínicas y de las analíticas. Resultados: Tres de las pruebas mejoraron significativamente tras el periodo de 6 meses de observación: el Sit To Stand 10, la dinamometría de la mano derecha y la dinamometría de la mano izquierda, pero sin alcanzar un cambio clínico relevante. Por otro lado, otras medidas no obtuvieron un deterioro significativo como fueron el Short Physical Performance Battery, el Sit to Stand 60, la elevación del talón izquierdo y el 6 minutos marcha. Conclusiones: Después de 6 meses, en ninguna de las pruebas de capacidad funcional se observa un deterioro significativo. Se recomienda a los centros de hemodiálisis realizar un seguimiento de capacidad funcional anualmente, ya que con un periodo de 6 meses no se encuentran cambios significativos.

  3. Mobilidade funcional em função da força muscular em mulheres idosas fisicamente ativas

    Directory of Open Access Journals (Sweden)

    João Puerro Neto

    2015-10-01

    Full Text Available RESUMOIntrodução:São muitas as alterações que influenciam a mobilidade funcional em idosos, como alterações pos-turais, diminuição da força muscular e amplitude de movimento.Objetivo:Determinar o parâmetro mais adequado para a estimativa da mobilidade funcional, assim como o efeito da força muscular sobre a mobilidade funcional de pessoas idosas.Métodos:A amostra foi constituída por 41 mulheres saudáveis na faixa etária de 60 a 78 anos de idade, que foram submetidas ao teste Time up and go (TUG, que testa as habilidades de mobilidade básicas das pessoas idosas frágeis (tempo para levantar e se mover, escala de equilíbrio de Berg (EEB, teste de alcance funcional (FRT e teste de uma repetição máxima (1RM.Resultados:A análise de componente principal (PCA revelou que somente a escala de Berg apresentou eigenvalue (autovalor maior que um, explicando 59% da variância. Por outro lado, a força muscular foi preditora de mobilidade funcional somente quando o TUG foi analisado, sugerindo que 20% da mobilidade funcional pode ser explicada pela força muscular (R=-0,42[R2=0,20, β=-0,29 ± 0,12, p=0,023].Conclusão:Conclui-se que a EEB pareceu representar o procedimento mais adequado para a estimativa da mobilidade funcional. A força muscular foi preditora de mobilidade funcional somente quando o TUG foi analisado.

  4. Funciones básicas de la familia. Reflexiones para la orientación psicológica educativa

    Directory of Open Access Journals (Sweden)

    Martín Martín- Cala

    2017-11-01

    Full Text Available El artículo aborda funciones básicas que debe cumplir la familia como sistema funcional sociocultural formativo en el proceso de formación integral de los niños, adolescentes y jóvenes. Se aportan reflexiones que permitirán la adecuada orientación psicológica y educativa de estos grupos etáreos.

  5. Actividad funcional cerebral en estado de reposo: REDES EN CONEXIÓN

    Science.gov (United States)

    Proal, Erika; Alvarez-Segura, Mar; de la Iglesia-Vayá, Maria; Martí-Bonmatí, Luis; Castellanos, F. Xavier

    2015-01-01

    Resumen El análisis de la conectividad funcional mediante resonancia magnética funcional (RMf) puede llevarse a cabo durante la realización de una tarea, la percepción de un estímulo o en estado de reposo. Estos análisis han demostrado su fiabilidad y reproducibilidad con diferentes enfoques (matemáticos, estadísticos, físicos) para seleccionar los vóxeles activados. El estudio de la señal de baja frecuencia en la actividad cerebral a través del contraste BOLD en estado de reposo ha revelado patrones de actividad cortical sincronizados, permitiendo describir la arquitectura funcional intrínseca del cerebro humano. La comunidad científica internacional dispone de recursos compartidos que contribuirán mediante este análisis de RMf en estado de reposo a la obtención de diagnósticos y tratamientos más precisos y avanzados en el campo de las neurociencias. PMID:21365601

  6. PARTICULARES QUE EJERCEN FUNCIONES ADMINISTRATIVAS: EL CASO DE LOS TRIBUNALES DE ÉTICA PROFESIONAL

    Directory of Open Access Journals (Sweden)

    David Suárez Tamayo

    2012-05-01

    Full Text Available Los tribunales de ética profesional son una de las tantas manifestaciones de la llamada descentralización por colaboración, mediante la cual, los particulares ejercen funciones administrativas. Dicha participación de los particulares en la gestión pública encuentra su fundamento en los artículos 2, 26, 123 y 210de la Constitución Política de Colombia de 1991. En la investigación realizadase encontró que en Colombia existen 29 tribunales, colegios o consejos de profesionales que tienen como una de sus funciones investigar y sancionar las conductas contra la ética profesional. En el trabajo se intenta abordar la manera como están integrados, los principios y procedimientos que siguen, el tipo de faltas que investigan, las sanciones que imponen, los términos de caducidad y prescripción, la garantía del debido proceso y la existencia o no de la segunda instancia. Finalmente se hace un inventario de los efectos e implicaciones que se siguen del hecho de ser particulares en ejercicio de funciones administrativas

  7. Funciones psíquicas de las marcas corporales. // Psychic functions of body marking.

    Directory of Open Access Journals (Sweden)

    Margarita María Valencia Valencia.

    2010-06-01

    Full Text Available This article shows the results of a research titled Funciones psíquicas de las marcas corporales (Psychic Functions of Body Marking that analyses the tattoo, scarification and piercing boom in teenagers and young people. Its aim is to elucidate the body statute in our days. From the acknowledgment of the changes in status of human body throughout history and in different cultures, we investigate the special psychic functions of those practices and their symbolic implications, by using some psychoanalytical theories about body image and adolescence. // Este artículo presenta los resultados de la investigación Funciones psíquicas de las marcas corporales, que interroga el significado del auge de tatuajes, escarificaciones y piercings en adolescentes y jóvenes, con el fin de esclarecer el estatuto del cuerpo en la contemporaneidad. A partir de un reconocimiento de los cambios de estatus que el cuerpo ha tenido a través de la historia y las culturas, se indaga, con ayuda de las teorizaciones psicoanalíticas sobre lo corporal y la adolescencia, acerca de las funciones psíquicas particulares de dichas prácticas y su alcance simbolizador.

  8. Influencia del nivel y de la actividad escolar en las funciones ejecutivas

    Directory of Open Access Journals (Sweden)

    Julio César Flores Lázaro

    2011-01-01

    Full Text Available El efecto de la escolaridad sobre el desempeño neuropsicológico ha sido ampliamente descrito excepto para las pruebas de funciones ejecutivas. En la actualidad más del 70% de la población mundial presenta un nivel educativo medio-bajo, por lo que es indispensable contar con el conocimiento sobre las características de desempeño en pruebas de funciones ejecutivas en este tipo de población; de forma que se pueda conocer y comprender sus características cognitivas. En este trabajo se analizó el efecto del nivel educativo y el tipo de actividad (escolar vs no escolar en una muestra de 83 participantes divididos en tres grupos: jóvenes con 11 años de escolaridad, adolescentes cursando el bachillerato, y jóvenes universitarios; sobre el desempeño en una amplia batería neuropsicológica de funciones ejecutivas. Los resultados muestran que la actividad escolar más que el nivel educativo es la principal variable que produce diferencias con los participantes jóvenes que ya no realizan su principal actividad en un contexto escolarizado.

  9. El impacto del cuidador principal en el deterioro funcional y cognitivo del anciano hospitalizado

    Directory of Open Access Journals (Sweden)

    Mª José Calero-García

    2012-08-01

    Full Text Available En la actualidad, existen en Andalucía más de 100.000 personas que sobrepasan los 85 años y dicha progresión va a continuar en el futuro. Paralelamente hay un desplazamiento de cuidados cada vez más complejos, hacia el sistema de cuidados informal, en un momento en el que la contención del gasto, provoca un escaso desarrollo de los servicios de atención sociales y domiciliarios. En este contexto la influencia de las personas que cuidan al anciano, tanto en el domicilio como durante los episodios de ingreso hospitalario, puede ser decisiva en la pérdida de la capacidad funcional y cognitiva del mismo. Nuestro objetivo es analizar la influencia de las distintas personas que ejercen de cuidador principal, en el domicilio y durante los episodios de ingreso hospitalario, en el estado funcional y cognitivo del anciano. Entre los resultados especial mención merece la influencia de la persona que ejerce de cuidador principal sobre el anciano, durante la hospitalización del mismo, observando que las personas acompañadas por su pareja e hijos sufren una menor pérdida funcional durante la hospitalización. Destacamos la novedad de incluir el tipo de cuidador principal en el hospital, como uno de los factores predictores de dependencia posterior en el domicilio y de cambio de domicilio posterior al ingreso.

  10. Desarrollo de funciones ejecutivas, de la niñez a la juventud

    Directory of Open Access Journals (Sweden)

    Julio C. Flores-Lázaro

    2014-05-01

    Full Text Available Las funciones ejecutivas se encuentran entre los procesos más complejos del humano; su desarrollo permite la conformación de diversas capacidades de control, y organización de la conducta y la cognición. En este artículo se presenta una extensa revisión de la literatura más relevante a nivel internacional sobre el tema. Se abarca el proceso de desarrollo desde la niñez hasta la juventud, analizando las características de desarrollo de las principales funciones ejecutivas. Se muestra que la hipótesis planteada por Victoria Anderson hace ya una década es correcta: las funciones ejecutivas se desarrollan de forma secuencial y curvilínea: un intenso progreso en la infancia, con una desaceleración a inicios de la adolescencia. También se analiza el efecto de otros factores adicionales a la edad como son el efecto de la escolaridad, los estilos parentales y el contexto cultural.

  11. Funciones del marcador discursivo pues en el habla de Medellín, Colombia

    Directory of Open Access Journals (Sweden)

    Grajales Alzate Róbinson

    2011-06-01

    Full Text Available En la actualidad las investigaciones sobre los marcadores discursivos se centran, más que en su clasificación, en la descripción de marcadores en particular o grupos de ellos. En este trabajo se define para cada una de las funciones del marcador discursivo pues su significado semántico-pragmático y su frecuencia de aparición. Para esta descripción se tomaron como base otras investigaciones sobre este marcador con el fin establecer las funciones que se han encontrado en la literatura especializada y usarlas como referencia para el análisis. La muestra de las ocurrencias del marcador discursivo pues se tomó del corpus Preseea-Medellín. Se encontraron siete funciones para este marcador en dicha comunidad de habla, de las cuales una no estaba registrada en la literatura revisada, lo cual contribuye a ampliar la descripción de este marcador en el español general y abre nuevas posibilidades para continuar la investigación del uso del marcador discursivo pues.

  12. Efeitos do resfriamento e aquecimento articular no desempenho funcional do ombro

    Directory of Open Access Journals (Sweden)

    Dayane de Oliveira Estevam

    2015-06-01

    Full Text Available INTRODUÇÃO: Um dos recursos mais utilizados na reabilitação de lesões musculoesqueléticas é a termoterapia por subtração de calor (crioterapia, enquanto a termoterapia por adição de calor é considerada o procedimento mais antigo de reabilitação física. Entretanto, há poucas evidências que tenham investigado os efeitos desses recursos sobre o desempenho de membros superiores. OBJETIVO: Comparar o efeito do resfriamento e do aquecimento articular sobre o desempenho funcional do membro superior. MÉTODOS: Trinta e quatro voluntários (22,23 ± 2,17 anos; 22,39 ± 2,53 kg/m2, de ambos os sexos, foram divididos aleatoriamente em um dos três grupos: 1 grupo crioterapia GCR (n=10: submetidos ao resfriamento articular por compressas frias; 2 grupo termoterapia - GTE (n=10: submetidos ao aquecimento articular por ondas curtas e 3 grupo controle - GCO (n=14, não submetidos a qualquer intervenção. Os voluntários foram avaliados, pré e pós-intervenção, quanto ao desempenho funcional de membros superiores por meio dos testes de estabilidade da extremidade superior em cadeia cinética fechada (TEESCCF e das condições de equilíbrio em apoio bimanual sobre o baropodômetro. Ainda, os voluntários foram avaliados quanto ao desempenho funcional virtual por meio do jogo Mario Kart (Nintendo Wii (r . RESULTADOS: Houve melhora significativa nos valores pós-intervenção no TEESCCF para o GCR (p0,05. Entretanto, na condição de olhos fechados, houve piora de desempenho para GTE (p=0,04 e melhora de desempenho para o GCO (p=0,02. Não houve alteração significativa no desempenho funcional virtual para os três grupos (p>0,05. CONCLUSÃO: Embora não tenha favorecido o desempenho funcional em todos os testes reais e virtuais utilizados, o resfriamento articular foi mais efetivo que o aquecimento articular para manter o desempenho muscular do membro superior, especialmente nas condições de equilíbrio sobre membros superiores na condi

  13. Trabalho, suporte social e lazer protegem idosos da perda funcional: estudo epidoso

    Directory of Open Access Journals (Sweden)

    Eleonora d'Orsi

    2011-08-01

    Full Text Available OBJETIVO: Identificar fatores de risco para perda da capacidade funcional de idosos. MÉTODOS: Estudo de coorte Epidoso (Epidemiologia do Idoso com idosos residentes em São Paulo, SP. Foram selecionados os 326 participantes da primeira entrevista (1991-1992 independentes ou com dependência leve (uma a duas atividades da vida diária. Aqueles que apresentaram perda funcional na segunda (1994-1995 ou terceira entrevistas (1998-1999 foram comparados aos que não a apresentaram. A incidência de perda funcional foi calculada segundo variáveis sociodemográficas, hábitos de vida, estado cognitivo, morbidade, internação hospitalar, autopercepção de saúde, edentulismo, suporte social e atividades de lazer. Calcularam-se riscos relativos brutos e ajustados com intervalos de 95% de confiança pela análise bivariada e múltipla com regressão de Poisson. Critério de inclusão das variáveis no modelo p 0,10. RESULTADOS: A incidência de perda funcional foi de 17,8% (13,6;21,9. Foram fatores de risco no modelo final: faixa etária 70 a 74 anos RR = 1,9(0,9;3,9; faixa etária 75 a 79 RR = 2,8(1,4;5,5; faixa etária 80 ou mais RR = 5,4(3,0;9,6; minimental < 24 RR = 1,8(1,1;2,9; asma RR = 2,3(1,3;3,9; hipertensão RR = 1,7(1,1;2,6 e diabetes RR = 1,7(0,9;3,0. Trabalho remunerado RR = 0,3 (0,1;1,0; relacionamento mensal com amigos RR = 0,5(0,3;0,8; assistir TV RR = 0,5 (0,3;0,9 e realizar atividades manuais RR = 0,7(0,4;1,0 foram fatores de proteção. CONCLUSÕES: A prevenção da perda funcional deve incluir o adequado controle das patologias crônicas, como hipertensão, asma e diabetes, além de estímulo à atividade cognitiva. Atividades de trabalho e lazer devem ser valorizadas por seu efeito protetor, assim como relacionamento com amigos.

  14. Implementation of computational model for the evaluation of electromagnetic susceptibility of the cables for communication and control of high voltage substations; Implementacao de modelo computacional para a avaliacao da suscetibilidade eletromagnetica dos cabos de comunicacao e controle de subestacoes de alta tensao

    Energy Technology Data Exchange (ETDEWEB)

    Sartin, Antonio C.P. [Companhia de Transmissao de Energia Eletrica Paulista (CTEEP), Bauru, SP (Brazil); Dotto, Fabio R.L.; Sant' Anna, Cezar J.; Thomazella, Rogerio [Fundacao para o Desenvolvimento de Bauru, SP (Brazil); Ulson, Jose A.C.; Aguiar, Paulo R. de [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Bauru, SP (Brazil)

    2009-07-01

    This work show the implementation of a electromagnetic model for supervision cable, protection, communication and high voltage substations control that was investigated in literature and adapted. The model was implemented by using a computational tool in order to obtain the electromagnetic behavior of various cables used in CTEEP substation, subject to several sources of electromagnetic interference in this inhospitable environment, such as lightning strikes, outbreaks of maneuvers switching and the corona effect. The results obtained in computer simulations were compared with results of laboratory tests carried out on a lot of cables that represent those systems that are present in substations 440 kV. This study characterized the electromagnetic interference, ranked them, identified possible susceptible points in the substation, which contributed to the development of a technical procedure that minimizes unwanted effects caused in communication systems and substation control. This developed procedure also assured the maximum reliability and availability in the operation of the electrical power system to the company.

  15. Rastreio de tuberculose nos funcionários de um Hospital Distrital

    Directory of Open Access Journals (Sweden)

    Jorge Pedrosa

    1998-03-01

    Full Text Available RESUMO: INTRODUÇÃO – após terem surgido dois casos com baciloscopias positivas em funcionários do Hospital Distrital de Oliveira de Azeméis em 1996, foi feito um rastreio de tuberculose em todos os profissionais desse Hospital.MATERIAL E MÉTODOS – foi afixado um aviso em todos os Serviços solicitando aos funcionários a realização da prova de tuberculina. Esta foi efectuada mediante injecçãao intra-dérmica de 2 unidades PPD (RT 23, por um único profissional de enfermagem. Aderiram à prova de Mantoux 202 dos 241 funcionários.Em todos os funcionários que referiram sintomas respiratórios (tosse e expectoração, foi efectuada telerradiografia de torax e baciloscopias em amostras após coloração pelo metodo de Ziebl-Neelsen e exame cultural em meio de Lowenstein-Jensen (exames realizados em 27 funcionários.RESULTADOS – foram encontrados 11 easos de tuberculose-infecção em indivíduos com menos de 35 anos (tendo 9 feito tratamento com terapêutica trip la durante dois meses e 6 casos de tuberculose pulmonar com baciloscopias positivas e confirmados no exame cultural.CONCLUSÕES – do estudo realízado concluiu-se que a incidência de tuberculose pulmonar nos funcionários do Hospital Distrital de Oliveira de Azeméis em 1996 foi de 2,54%, o que corresponde aproximadamente ao triplo da incidência na população em geral da área em questão.REV PORT PNEUMOL 1998; IV (2: 147- 153 ABSTRACT: BACKGROUND: After two cases of Pulmonary Tuberculosis were found in healthcare workers of a Regional Hospital in Portugal a study was done to determine the incidence of Tuberculosis in health-workers of the Oliveira de Azeméis Hospital in 1996.METHODS: An information-note was affixed in all Services asking all the workers to do the Tuberculin-test. An intradermic injection of 2 U. of PPD (RT 23, by one trained nurse was done in 202 of 241 health

  16. Long-term exposure to electric fields. A cross-sectional epidemiologic investigation of occupationally exposed workers in high-voltage substations.

    Science.gov (United States)

    Knave, B; Gamberale, F; Bergström, S; Birke, E; Iregren, A; Kolmodin-Hedman, B; Wennberg, A

    1979-06-01

    In the present epidemiologic study, 53 workers with a long-term (more than five years) exposure to the electric field of 400 kV substations were examined and compared with a matched reference group of 53 nonexposed workers from the same power companies. Matching variables included age, geographic location and employment time. The aim of the study was to investigate the possibility of persistent, chronic health effects in the exposed group as a consequence of exposure. The investigation indluded the nervous system (neurasthenic symptoms, psychological tests, electroencephalography), the cardiovascular system (symptoms, blood pressure, electrocardiography), and the blood (hemoglobin, red blood cells, reticulocytes, white blood cells including differential count, thrombocytes, sedimentation rate). Fertility was also assessed. The results showed no differences between the exposed and reference groups as a consequence of the long-term exposure to the electric fields. The groups differed, however, in that the exposed group had (a) consistently better results on the psychological performance tests, (b) a fewer number of children, especially boys, and (c) somewhat higher education. The differences in test results were due to the higher education among the exposed. The difference in number of children was also thought to be related to factors other than exposure since it was found to be present already 10--15 years before the work in 400 kV substations began.

  17. Ergonomic analyse of operation work in electric energy transmission substation; Analise ergonomica do trabalho de operacao de subestacoes de transmissao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Menegon, Nilton Luiz

    1993-04-01

    The activity by the workers in sub-stations which transmits and distributes electric energy is studied within the context of ergonomic, i.e., of its adequateness to the human being characteristics. In the introduction of this book the ideas of ergonomic related to the behaviour of the workers who works which continuous processes in control room are reviewed. The development of the ideas in this field as well as the methodology to be followed in this work are discussed. The technical system involving the activities of the workers in sub-station is presented. These activities are inserted within a broad context of the electric energy sector. An analysis concerning the problems in the ergonomic field which justifies the ergonomic intervention follows the previous study. The work situation is characterized. The formal organization of the work and its physical and cognitive demands are examined. The task is explained in detail. With the analysis of the activities based on the systematic observation of the work performed by the workers, we finish this study. Finely, a diagnosis of the work situation and the recommendations compromised whit the workers health and improvement of the performance is settled. (author) 27 refs., 26 figs.

  18. Korean district heating. Part 2: Investigation of the consumption pattern in a substation at Korea District Heating Corporation at the turn of the year 1994/95

    Energy Technology Data Exchange (ETDEWEB)

    Joensson, Mats; Olsson, Nils

    1996-05-01

    This thesis, which is the second part of two, analyses the consumption pattern and the conditions for district heating in the Republic of Korea at the turn of the year 1994-95. It is based on a study made in Seoul at Korea District Heating Corporation which is the largest district heating utility in Korea. District heating was introduced in the 80s because of the environmental advantages. In 1994 KDHC provided 340 000 households with district heating. KDHC receives most of its thermal energy from combined heat and power plants which use natural gas as fuel. One substation was chosen for the investigation and temperature, flow, and pressure were measured. A typical Korean substation has heat exchangers connected in parallel in only one step and the apartment complexes use floor heating for internal heating. The space heating load shows a linear relation to the outdoor temperature. The hot tap-water consumption shows a highly varying pattern with peak loads in the morning and evening. There were also an oscillating pattern for some of the temperatures and flows caused by poor regulation. DH suits very well to Korea with its climate and the overpopulated cities. KDHC:s expansion will help to make Korea one of the leading countries in modern district heating. 10 refs, 36 figs, 11 tabs

  19. Hamdan Substation, Basrah, Iraq

    Science.gov (United States)

    2006-03-10

    of UNIGEAR /82, rated voltage at 50 Hz and 36 kV, rated Busbar current as 1250 kA, short time current of 25 kA x 3 seconds. The units are listed...rated Busbar current as 2000 A, and rated short time current of 31.5 kA x 3 seconds. This unit is listed as to standard IEC 62271- 200. The serial

  20. Gas insulated substations

    CERN Document Server

    2014-01-01

    This book provides an overview on the particular development steps of gas insulated high-voltage switchgear, and is based on the information given with the editor's tutorial. The theory is kept low only as much as it is needed to understand gas insulated technology, with the main focus of the book being on delivering practical application knowledge. It discusses some introductory and advanced aspects in the meaning of applications. The start of the book presents the theory of Gas Insulated Technology, and outlines reliability, design, safety, grounding and bonding, and factors for choosing GIS. The third chapter presents the technology, covering the following in detail: manufacturing, specification, instrument transformers, Gas Insulated Bus, and the assembly process. Next, the book goes into control and monitoring, which covers local control cabinet, bay controller, control schemes, and digital communication. Testing is explained in the middle of the book before installation and energization. Importantly, ...

  1. Funciones de enfermería en la unidad quirúrgica de nefrología

    Directory of Open Access Journals (Sweden)

    Yanela Díaz Oquendo

    Full Text Available Los cuidados que se desarrollan en la unidad quirúrgica de Nefrología requieren de un personal de enfermería con capacidad para responder a las diferentes funciones de acuerdo al nivel profesional alcanzado y a las necesidades que requieren los pacientes con afecciones renales. Objetivos: Definir las funciones de enfermería en la unidad quirúrgica por niveles de formación. Material y métodos: Se realizó una investigación de desarrollo tecnológico en el Instituto de Nefrología y Hospital Hermanos Armejeiras en el período 2010-2012. Se utilizó la metodología DEFUN (delimitación de funciones y como técnicas cualitativas se usaron la revisión documental y la consulta a expertos. El universo se conformó de 24 profesionales entre enfermeros técnicos, licenciados y médicos de la especialidad; 11 profesionales conformaron el comité de expertos con los cuales se realizó un taller para la identificación y propuesta preliminar de las funciones. Se aplicó el método Delphi para la validación y propuesta de las funciones a 13 profesionales que formaron parte del panel de expertos. Resultados: La propuesta de las funciones se realizó sobre la base de las ya descritas para el licenciado y técnico en enfermería contenidas en la Resolución Ministerial 396/07, obteniéndose de 19 funciones propuestas para el licenciado en enfermería se aceptaron 17 y para el técnico en enfermería de 15 propuestas fueron aceptadas 14 funciones. Conclusiones: Quedan definas las funciones de enfermería por niveles de formación lo cual amplia el perfil de desempeño en correspondencia con el desarrollo alcanzado por la especialidad en el país.

  2. Funciones de la responsabilidad civil: cambio de paradigmas en el sistema de Derecho Privado argentino

    Directory of Open Access Journals (Sweden)

    Sandra Natalia Umansky

    2016-09-01

    Full Text Available El presente artículo tiene por finalidad comentar la transformación operada en el sistema del Derecho Privado patrimonial argentino; a través de la inclusión de una variedad de funciones de la responsabilidad civil; tradicionalmente pergeñada en el Código de Vélez como compensatoria. Se ha propuesto; asimismo; analizar la evolución de estas funciones desde la incorporación de algunos institutos provenientes de distintos microsistemas del Derecho Civil; como el Derecho Ambiental y el de Consumo; para estudiar el proceso de modificación de la legislación privada argentina desde el Anteproyecto de 2012 hasta su regulación actual el Código Civil y Comercial de la Nación -en adelante CCCN-; en aras de explicitar la configuración actual del sistema de responsabilidad civil vigente. Para ello se ha realizado una investigación de abordaje cualitativo; con técnicas descriptivas y bibliográficas; caracterizada como pura; si se analizan sus objetivos extrínsecos; y longitudinal en cuanto a su temporalización. Como conclusión principal podemos derivar que la responsabilidad en el Derecho privado patrimonial argentino asume una pluralidad de funciones; centralmente preventiva y resarcitoria; y periféricamente precautoria y punitiva; debiendo el intérprete realizar un adecuado diálogo de fuentes para la articulación del sistema a fin de mantener la plena vigencia de esta polifuncionalidad.

  3. Memoria sobre el papel de Liouville en la historia de las funciones elípticas

    Directory of Open Access Journals (Sweden)

    Leonardo Solanilla Chavarro

    2014-06-01

    Full Text Available Este artículo recoge las principales conclusiones de una investigación sobre las contribuciones de J. Liouville a la teoría contemporánea de las funciones elípticas. Cubre la mayor parte de los resultados de una colaboración entre el grupo SUMMA del Departamento de Ciencias Básicas de la Universidad de Medellín y el grupo Mat del Departamento de Matemáticas y Estadística de la Universidad del Tolima. El proyecto ha sido financiado parcialmente por la Vicerrectoría de Investigaciones de la Universidad de Medellín y la Facultad de Ciencias de la Universidad del Tolima. Comienza con una descripción de la circunstancia histórica de Liouville, luego de la emergencia del concepto moderno de función elíptica en los trabajos de Abel y Jacobi. Después se discuten ciertos pormenores de las Leçons impartidas por el célebre matemático francés en el año de 1847. Ellos cubren el teorema que hemos llamado de Liouville-Borchardt, las proposiciones fundamentales sobre el número de ceros de las funciones meromorfas doblemente periódicas y los resultados sobre la relación entre los ceros y los polos. Al final, se esbozan importantes conclusiones sobre el legado de Liouville a la teoría de las funciones elípticas de hoy.

  4. Capacidade funcional e cognitiva de idosas praticantes de diferentes modalidades de exercícios físicos

    Directory of Open Access Journals (Sweden)

    Daniel Vicentini de Oliveira

    2015-01-01

    Full Text Available Objetivo: comparar la capacidad funcional y cognitiva de ancianas practicantes de diversas modalidades de ejercicio físico. Métodos: estudio cuantitativo, transversal, descriptivo, de observación y analítico, con 120 voluntarios, divididos en tres grupos de 40 ancianas: aeróbic, Academia de la Tercera Edad y grupo musculación. La capacidad funcional se evaluó mediante evaluación funcional del Protocolo Grupo de Desarrollo de América Latina para madurez, y la evaluación cognitiva se utilizó Mini-Mental del Estado Mental. Resultados: la capacidad funcional de las ancianas en las tres modalidades se clasificaron como débil, mostrando diferencias significativas entre los grupos (p=0,082. La capacidad cognitiva mostró puntajes cerca de puntuación perfecta en las tres modalidades de ejercicio, sin significación estadística (p=0,062. Conclusión: es baja la capacidad funcional de las ancianas evaluadas, así como el tipo de ejercicio no interfiere en el rendimiento cognitivo.

  5. Medidas directas e indirectas de las funciones ejecutivas en niños con trastorno de espectro autista

    Directory of Open Access Journals (Sweden)

    María Fernanda Pérez Pichardo

    2018-01-01

    Full Text Available INTRODUCCIÓN: los niños con trastorno del espectro autista (TEA tienen dificultades en las funciones ejecutivas (FE pero se han sugerido discrepancias entre las medidas directas e indirectas.   OBJETIVO: conocer si existen diferencias en las funciones ejecutivas mediante medidas directas e indirectas entre niños con y sin TEA.   MÉTODO: se incluyeron 14 varones entre primero y tercero de primaria, 50% con diagnóstico de TEA y 50% con desarrollo neurotípico, seleccionados por emparejamiento en edad y grado escolar. El promedio de edad de la muestra fue de 7.43 (DE 0.98 años. Se aplicaron las pruebas de Evaluación neuropsicológica de funciones ejecutivas en niños (ENFEN y el Inventario de clasificación comportamental de las funciones ejecutivas (BRIEF.   RESULTADOS: se encontraron diferencias significativas en las medidas de las FE indirectas, pero no en las directas, entre los grupos (p < 0.05. Así mismo, las correlaciones entre las medidas directas e indirectas fueron mayores en el grupo con TEA.   CONCLUSIONES: los niños con TEA son evaluados con más dificultades en las medidas indirectas de las funciones ejecutivas, pero obtienen puntuaciones similares a los niños con desarrollo neurotípico cuando son evaluados en condiciones estructuradas empleando medidas directas.

  6. Las funciones ejecutivas como predictoras de rendimiento deportivo en fútbol sala.

    OpenAIRE

    Herrero Carrasco, Rubén

    2017-01-01

    Introducción La búsqueda de factores que determinen el rendimiento deportivo ha llevado a investigar cuáles son las claves que tienen mayor influencia. Parece que una de ellas podría ser las capacidades cognitivas de los participantes en los deportes de interacción como el fútbol sala. Estudios recientes han encontrado relación entre el rendimiento en dichos deportes y habilidades cognitivas de orden superior conocidas como funciones ejecutivas. También, se ha encontrado que los deportista...

  7. Batería luria inicial y desarrollo de las funciones psicológicas superiores

    Directory of Open Access Journals (Sweden)

    Yaser Ramírez Benítez

    2014-06-01

    Full Text Available La batería neuropsicológica Luria Inicial es un instrumento válido para evaluar y seguir el desarrollo de las funciones psicológicas superiores en la edad preescolar. El modelo neuropsicológico de Luria ofrece la posibilidad para conocer las funciones superiores del niño. Metodología: La investigación pretende determinar la utilidad clínica del instrumento Luria Inicial en la población cubana preescolar con alteraciones del neurodesarrollo. El objetivo se cumplió con la revisión de los trabajos científicos publicados en la fecha 2006-2013 en bases de datos electrónica (Scielo, EBSCO host, LILACS, Medigraphic. Resultados: El instrumento tiene una efectiva utilidad clínica para conocer el perfil neuropsicológico del niño preescolar con alteraciones del neurodesarrollo. Los resultados en varias poblaciones (TDAH, bajo peso al nacer, desórdenes metabólicos informan que el acto motor con intencionalidad, la inhibición conductual y la organización espacial son habilidades diana a cualquier evento que interrumpan el neurodesarrollo. La adquisición de la función reguladora del habla predice las condiciones preacadémicas del niño en conjunto con el estado real de las funciones superiores. La utilidad clínica del instrumento está en la posibilidad de describir-explicar el estado real de las funciones superiores y su potencial: el niño puede ejecutar e imitar movimientos, dibujar, reconocer los colores y hablar (estado real, pero si no organiza esas ejecuciones a través de la función reguladora del habla (estado potencial estará sujeto a errores y a no aprender por orientaciones del adulto en la etapa escolar. La línea de pensamiento que ofrece Luria para estudiar a los niños es válida y confiable para diagnosticar y rehabilitar las secuelas del sistema nervioso en desarrollo.

  8. Aprendiendo a prescribir cuidados según capacidad funcional en soporte electrónico

    OpenAIRE

    González Chordá, Víctor Manuel; Mena Tudela, Desirée; Cervera Gasch, Águeda; Salas Medina, Pablo; Orts-Cortés, María Isabel; Maciá Soler, Loreto

    2014-01-01

    Objetivo: Conocer los resultados en términos de ganancia funcional de la aplicación de un sistema de registro electrónico basado en el índice de Barthel y la prevención de efectos adversos como método de prescripción y ejecución de cuidados estandarizados, utilizado por estudiantes de enfermería bajo la tutela de enfermeras clínicas acreditadas durante las prácticas clínicas tuteladas en la Universitat Jaume I. Material y métodos: Estudio descriptivo, prospectivo, longitudinal, multicéntrico....

  9. Mínimos cuadrados generalizados para funciones vectoriales en la Geofísica Espacial

    Directory of Open Access Journals (Sweden)

    Jorge Lemagne Pérez

    2012-04-01

    Full Text Available Se expone una aplicación del ajuste de datos mediante mínimos cuadrados generalizados para funciones vectoriales, a la modelación de los parámetros de la Geofísica Espacial f0F2 y Dst, con el objetivo de pronosticar los mismos. Se emplean un modelo con retardo y dos algoritmos que fueron creados, uno para el ajuste y el otro para estimar la matriz de covarianzas, ambos implementados en MATLAB Versión 7.3.

  10. Betões eco-eficientes de matriz multi-funcional

    OpenAIRE

    Torgal,Fernando Pacheco; Jalali, Said

    2010-01-01

    Os betões eco-eficientes de matriz multi-funcional, congregam simultaneamente as características de sustentabilidade dos betões com incorporação de resíduos, as capacidades mecânicas dos compósitos de carbono, e ao mesmo tempo apresentam um comportamento “inteligente” actuando como materiais sensores. As funções “inteligentes” destes materiais incluem, controlo da integridade estrutural), monitorização da temperatura, interferência electromagnética, auto-aquecimento e protecção catódica no se...

  11. Análisis del Sistema Funcional Atencional en el Traumatismo Craneoencefálico Leve.

    OpenAIRE

    Regúlez Ibarretxe, Pilar

    2016-01-01

    [ES]El traumatismo craneoencefálico es un daño en la estructura cerebral causada por una fuerza externa que ocasiona trastornos en el funcionamiento cerebral. El traumatismo craneoencefálico leve es el tipo de lesión cerebral traumática más frecuente, estimándose su prevalencia entre un 70-90% del total de diagnósticos de traumatismo craneoencefálico. Las alteraciones en el sistema funcional atencional aparecen con una alta probabilidad tras una lesión de este tipo, lo cual tiene una gran rep...

  12. Evaluación del nopal verdura como alimento funcional mediante opciones reales

    OpenAIRE

    Valencia Sandoval, Karina

    2010-01-01

    El nopal (Opuntia spp.) es una especie básica en el consumo de los mexicanos, ya que en torno a este producto giran innumerables actividades económicas del campo y la industria. Además, el nopal puede ser considerado como un alimento funcional, es decir, que mejora la salud de quien lo consume. En el presente trabajo se hizo un estudio comparativo de la ganancia obtenida con un cultivo de nopal sin diferenciar y un cultivo en el que se invierten recursos, con el fin de promocionar sus cara...

  13. Los espectadores ante la violencia televisiva: funciones, efectos e interpretaciones situadas

    OpenAIRE

    Fernández-Villanueva, C. (Concepción); Revilla-Castro, J.C. (Juan Carlos); Domínguez-Bilbao, R. (Roberto); Almagro-González, A. (Andrés)

    2008-01-01

    La investigación sobre violencia en televisión se ha orientado a una labor cuantificadora de lo emitido o a la práctica experimental para determinar sus posibles efectos. El presente trabajo se centra en cómo interpretan los espectadores las imágenes de violencia. Basado en el análisis de 16 grupos de discusión, muestra las dimensiones que mediatizan los posibles efectos de la violencia televisiva; en concreto, las condiciones en que se reconocen y clasifican escenas de violencia, las funcion...

  14. "Ritos de Paso": una revisión del modelo funcional

    Directory of Open Access Journals (Sweden)

    Manuel de Prada

    1999-07-01

    Full Text Available Este estudio pretende aclarar la razón por la que algunas residencias inglesas, antiguas y modernas, interrumpieron su eje de acceso contra toda lógica funcional; un hecho significativo cuando se relaciona con las colisiones entre modelos y órdenes diferentes de la arquitectura inglesa residencial. Éstas colisiones aparecieron cuando los constructores ingleses intentaron hacer compatible la irregularidad de los modelos tradicionales (de la mansión medieval y los pintorescos "castles" y "cottages" que tanto juego dieron a John Nash con el orden y regularidad de los modelos italianos.

  15. CARACTERÍSTICAS ANÁTOMO-FUNCIONAL DEL APARATO RESPIRATORIO DURANTE LA INFANCIA

    OpenAIRE

    Asenjo, Carlos A.; Pinto, Ricardo A.

    2017-01-01

    El sistema o aparato respiratorio, presenta diferencias significativas con el adulto, derivadas principalmente de su inmadurez anatómica y fisiológica. Esto le confiere gran labilidad funcional, tanto mayor cuanto menor es su edad. Como compensación, presenta abundancia e intensidad de síntomas en la falla respiratoria, que hace que las enfermedades respiratorias no pasen inadvertidas y merezcan especial atención, en forma precoz. Como excepción a la regla, los recién nacidos expresan pobreme...

  16. Estrategias para el aprendizaje de las funciones reales con la plataforma Moodle

    OpenAIRE

    Andrés Sánchez

    2015-01-01

    El presente artículo se enmarca dentro de la línea de investigación, Didáctica y Tecnología Educativa de la Universidad Pedagógica Experimental Libertador “Gervasio Rubio”. Su propósito, es analizar la incidencia de la plataforma moodle en el uso de las estrategias de aprendizaje para la enseñanza de las matemáticas específicamente sobre las funciones reales, impartida en la educación media. El enfoque se basa en el apoyo de esta plataforma, como medio que facilita el desarrollo del aprendiza...

  17. Análisis funcional de genes reguladores del desarrollo floral de guisantes (Pisun sativum L.).

    OpenAIRE

    Berbel Tornero, Ana

    2002-01-01

    RESUMEN Con el fin de profundizar en la comprensión de los mecanismos moleculares que gobiernan los procesos de la iniciación y desarrollo floral de guisante nos planteamos los siguientes objetivos : PRIMERO.- Análisis funcional de los genes MADS de guisante PEAM1, PEAM4 y PEAM6 mediante dos tipos de abordajes, alternativos a la transformación de guisante: (i) analizando el fenotipo resultante de su expresión constitutiva en plantas silvestres de los sistemas heterólogos Arabidopsis thalia...

  18. Modelado y análisis de mecanismos para funciones de Pick & Place

    OpenAIRE

    Gutiérrez Castro, Daniel

    2011-01-01

    Este proyecto trata de analizar el comportamiento de una serie de mecanismos que pretenden ser utilizados en la práctica como mecanismo de acción en brazos robóticos. Dichos brazos robóticos se diseñarán con vista a realizar funciones de pick & place en líneas de fabricación. La diferencia de estos mecanismos con los que existen en la actualidad es la simplicidad en cuanto al control de la actuación. En el presente estudio, la actuación es llevada a cabo por un sólo motor. C...

  19. La salud oral y el bienestar funcional de los ancianos portugueses institucionalizados

    OpenAIRE

    Costa, José dos Santos

    2015-01-01

    [ES]El principal problema del envejecimiento son las enfermedades crónicas no transmisibles que representan la mayor causa de muerte en ancianos, tanto en países desarrollados, como los que se encuentran en vías de desarrollo, y son también responsables de la pérdida de capacidad funcional, mayor dependencia, mayor necesidad de cuidados, mayor tasa de institucionalización y menor calidad de vida en esa franja creciente de la población. Entre esas enfermedades están la artritis, diabetes, hipe...

  20. Efeitos do resfriamento e aquecimento articular no desempenho funcional do ombro

    OpenAIRE

    Dayane de Oliveira Estevam; Marcelo de Lima Oliveira; Marcelo Lourenço da Silva; Leonardo César Carvalho; Daniel Ferreira Moreira Lobato

    2015-01-01

    INTRODUÇÃO: Um dos recursos mais utilizados na reabilitação de lesões musculoesqueléticas é a termoterapia por subtração de calor (crioterapia), enquanto a termoterapia por adição de calor é considerada o procedimento mais antigo de reabilitação física. Entretanto, há poucas evidências que tenham investigado os efeitos desses recursos sobre o desempenho de membros superiores. OBJETIVO: Comparar o efeito do resfriamento e do aquecimento articular sobre o desempenho funcional do membro superior...

  1. Estudio de las funciones biológicas de S-Resistina.

    OpenAIRE

    Rodríguez Pérez, María

    2016-01-01

    S-resistina es una isoforma no secretada de resistina generada por splicing alternativo en tejido adiposo blanco de ratas Wistar que presenta localización preferentemente nuclear. Al analizar la presencia de esta isoforma en diferentes tejidos, comprobamos que se expresa igualmente de forma abundante en hipotálamo. Con el fin de estudiar las funciones biológicas de s-resistina en este trabajo se plantearon dos estrategias diferentes. Por un lado, se llevaron a cabo experimentos in vitro,...

  2. Efectos del entrenamiento funcional de fuerza y equilibrio en personas mayores

    OpenAIRE

    Rodríguez Berzal, Elena

    2016-01-01

    Por el paso del tiempo el cuerpo sufre un deterioro con características como la sarcopenia, modificación de los patrones de marcha y perdidas de equilibrio entre otras. Esto son signos del denominado síndrome de fragilidad en mayores. Esta tesis doctoral pretende evaluar la fuerza del tren inferior y el equilibrio en personas mayores mediante test en plataformas de fuerza y estudiar el efecto de un entrenamiento funcional de fuerza y equilibrio en este tipo de población. Está basada en dos es...

  3. Efeito do treinamento resistido na pressão arterial e capacidade funcional de idosas hipertensas

    OpenAIRE

    Cunha, Eline Silva da

    2010-01-01

    Os resultados dos estudos sobre a intensidade ideal do treinamento resistido para redução dos níveis pressóricos de repouso, assim como, desse tipo de treinamento sobre o aumento da capacidade funcional de idosas hipertensas ainda são obscuros, uma vez que as poucas investigações realizadas geralmente analisam indivíduos jovens normotensos, sendo a literatura carente de informação precisa em sujeitos idosos hipertensos. Objetivos: Verificar a repercussão de duas intensidades de treinamento re...

  4. Funciones de los astrocitos en las enfermedades neurodegenrativas: Enfermedad de Alexander

    OpenAIRE

    Nae, María Magdalena

    2016-01-01

    Los astrocitos han sido considerados como células de sostén en el Sistema Nervioso central (SNC). Sin embargo, hoy día se sabe que participan de forma activa en muchas de las funciones del SNC y que pueden tener un papel destacado en las enfermedades neurodegenerativas. Existen numerosas evidencias de que las alteraciones de la función astrocitaria pueden contribuir al desarrollo, e incluso provocar patologías en el SNC, especialmente patologías neurodegenerativas. Por un lado,...

  5. Contenidos virtuales para neurorrehabilitación funcional de la extremidad superior

    OpenAIRE

    Molina Nájera, Fernando; Almenar Masbernat, M.; Ontiveros Ravell, J.; Gómez, C; Villán Villán, M.A.; Pérez Rodríguez, R.; Martín, C; Opisso, Eloy; Medina Casanovas, J.; Tormos Muñoz, José M.; Gómez Aguilera, Enrique J.

    2015-01-01

    La utilización de entornos virtuales de rehabilitación que hacen uso de dispositivos comerciales para el entretenimiento ha adquirido un gran interés en el área de neurorrehabilitación. El objetivo del presente trabajo es diseñar y desarrollar contenidos virtuales (CVs) para rehabilitación funcional en pacientes con Traumatismo Craneoencefálico (TCE). Para ello se han diseñado dos actividades de rehabilitación que hacen uso del sensor de profundidad de bajo coste Microsoft Kinect junto con di...

  6. Máquina calculadora de funciones trascendentales basada en el algortimo cordic con nios ii

    OpenAIRE

    Basurto Chicango, Juliana Abigail; Crespin Cedeño, Jorge Xavier; Ponguillo Intriago, Ronald

    2014-01-01

    El proyecto tiene como finalidad la implementación de un sistema embebido en una arquitectura de hardware basada en el procesador configurable Nios II y programado en un FPGA, que tendrá inmerso un módulo ip core cuya función es realizar el cálculo de funciones trascendentales. El módulo IP CORE está basado en el algoritmo CORDIC y juntos a otros bloques embebidos en un dispositivo ALTERA CYCLONE II FPGA se interconectan al procesador NIOS II, por medio de la implementación de un bus Avalo...

  7. Valoración funcional del adulto mayor relacionado con el abandono familiar.

    OpenAIRE

    Jenny Fernanda Villarroel Vargas; Vicente Hernán Cárdenas Naranjo; Josefa Margarita Miranda Vázquez

    2017-01-01

    Introducción: Se estima que entre el 2000 al 2050 la población mundial envejecida ascenderá del 11% al 22 %, con ello el incremento de las diversas enfermedades o trastornos propios de la edad. Objetivo: Establecer la relación entre capacidad funcional del adulto mayor con el abandono familiar en el barrio La Calera Centro, Latacunga, 2015-2016. Métodos: Se realizó un estudio observacional descriptivo de corte trasversal, donde previo consentimiento informado participaron 70 adultos m...

  8. Introducción a la teoría de crecimiento de funciones enteras

    OpenAIRE

    Rodríguez Ballesteros, Rubén

    2015-01-01

    La asignatura obligatoria "Variable Compleja" del tercer curso del Grado en Matemáticas de la Universidad de Valladolid cubre los contenidos realmente esenciales de la teoría elemental de funciones de variable compleja. Muchos aspectos de esta teoría que resultan accesibles al estudiante tras esta formación inicial quedan necesariamente sin cubrir, y uno de los más significativos es el que concierne a los resultados que relacionan entre sí el estudio del crecimiento de las f...

  9. ADAPTACION DE LA FUNCION DEL ROL DE ENFERMERIA, A LOS ESTIMULOS DE JEFES DE SERVICIO

    OpenAIRE

    HERNANDEZ LOPEZ, KARLA NAYELI

    2012-01-01

    La búsqueda constante, hacía la práctica profesional de enfermería, realizada con calidad, exige cambios frecuentes e innovaciones, lo que implican que las actividades de enfermería estén caracterizadas por una dinámica profesional continua. Considerando que las jefes de servicio, son el personal de enfermería que desempeñan sus actividades profesionales, directamente con el personal operativo y que influye, por el ejercicio de sus funciones, en el cuidado otorgado por el pe...

  10. La dispepsia funcional: Aspectos biopsicosociales, evaluación y terapia psicológica

    OpenAIRE

    Stefano Vinaccia Alpi; Bonifacio Sandín; Sergio Tobón; Ariel César Núñez Rojas

    2008-01-01

    Se abordan los aspectos conceptuales del trastorno gastrointestinal Dispepsia funcional (DP), en lo que se refiere a su definición, prevalencia, clasificación y diagnóstico.; las causas y consecuencias de la DF desde una perspectiva biopsicosocial (variables socioeconómicas, demandas psicosociales, evaluación cognitiva y estrategias de afrontamiento, personalidad y comportamiento, mecanismos psicobiológicos, calidad de vida, tratamiento y evolución); la evaluación psicológica de la DF desde ...

  11. Study of multilevel inverters with extended functions; Estudio de inversores multinivel con funciones ampliadas

    Energy Technology Data Exchange (ETDEWEB)

    Miranda Vidales, Homero

    2007-06-15

    strategies to implement the modulation and programming technique. [Spanish] Desde 1980 los convertidores multinivel han sido parte fundamental en equipos de electronica de potencia tales como variadores de velocidad para motores de induccion. En las ultimas decadas las aplicaciones de estos convertidores se extendieron a otras funciones tales como vehiculos electricos, sistemas de transmision de energia y equipos acondicionadores de red. En la actualidad los convertidores multinivel han ganado un espacio muy importante en aplicaciones de media y alta tension gracias a sus caracteristicas que presentan. Especialmente en acondicionadores de red los cuales son equipos de electronica de potencia que se basan en convertidores estaticos. Entre las principales aplicaciones de los acondicionadores de red son la compensacion de armonicas en corriente y/o tension, la generacion de potencia reactiva y la compensacion de desviaciones en la magnitud de tension. La contaminacion armonica en la red electrica es uno de los problemas mas severos y cabe mencionar que en la mayoria de los paises industrializados no existe cargo alguno que penalice la generacion y propagacion armonica. Sin embargo, es necesario hacer un estudio y proponer soluciones que ayuden a reducir los efectos ocasionados por la generacion de armonicas en corriente y/o tension. Una solucion a este problema son los filtros activos, que se encuentran dentro de los acondicionadores de red, los cuales ayudan a reducir la cantidad de armonicos que circulan en la red electrica. Sin embargo en sistemas de media y alta tension se complica la utilizacion de estos equipos ya que los dispositivos de potencia que componen a los convertidores convencionales (dos niveles) no soportan altos niveles de tension y corriente simultaneamente. Como una solucion a estos problemas surgen los inversores multinivel. Los inversores multinivel son equipos que operan con bajos niveles de tension en las fuentes de CD y los dispositivos semiconductores

  12. Management functions for a distributed system applied in power plants and substations automation; Funcoes de gerenciamento para um sistema distribuido aplicado na automacao de usinas e subestacoes

    Energy Technology Data Exchange (ETDEWEB)

    Lemos, Rogerio Sergio Neves de

    1988-04-01

    This work presents the management functions for a distributed computer control system, which has been developed at Centro de Pesquisas de Energia Eletrica - CEPEL with the aim to automate hydroelectric power plants and extra high voltage power substations. The initial specifications developed are based on a architecture without redundancies which initially has the objective to get the effective knowledge of the system's behaviour. In the first part is given an introduction of dependability, with two aims: to present the basic concepts and terminology, and, to present a set of techniques in the area of computing systems fault tolerance. In control system is introduced, in terms of its architecture and functionality. The third part introduces the management activities for the distributed system are introduced together with a general model. Finally, the fault diagnosis in the distributed system is discussed, where is presented a new diagnosis algorithm. (author)

  13. Effects of aging on the structural, mechanical, and thermal properties of the silicone rubber current transformer insulation bushing for a 500 kV substation.

    Science.gov (United States)

    Wang, Zhigao; Zhang, Xinghai; Wang, Fangqiang; Lan, Xinsheng; Zhou, Yiqian

    2016-01-01

    In order to analyze the cracking and aging reason of the silicone rubber current transformer (CT) insulation bushing used for 8 years from a 500 kV alternating current substation, characteristics including Fourier transform infrared (FTIR) spectroscopy, mechanical properties analysis, hardness, and thermo gravimetric analysis have been carried out. The FTIR results indicated that the external surface of the silicone rubber CT insulation bushing suffered from more serious aging than the internal part, fracture of side chain Si-C bond was much more than the backbone. Mechanical properties and thermal stability results illustrated that the main aging reasons were the breakage of side chain Si-C bond and the excessive cross-linking reaction of the backbone. This study can provide valuable basis for evaluating degradation mechanism and aging state of the silicone rubber insulation bushing in electric power field.

  14. LA VIDEOCONFERENCIA DE ESCRITORIO COMO APOYO PARA LA EDUCACIÓN DE PERSONAS CON DIVERSIDAD FUNCIONAL

    Directory of Open Access Journals (Sweden)

    Ana Aurora Vidal Martínez

    2015-01-01

    Full Text Available En el presente ensayo se describe el contexto en el que se ha dado el desarrollo educativo de las personas con diversidad funcional para caminar en México y el apoyo que reciben de organismos internacionales y del Gobierno Mexicano, ya que el mismo se ve truncado por diversas causas, siendo una de ellas, la dificultad para asistir a una institución educativa, principalmente por la deficiente infraestructura urbana y de transporte. Este trabajo se fundamenta en investigaciones realizadas por varias instituciones como: El Instituto Nacional de Estadística y Geografía (INEGI, Organización de las Naciones Unidas para la Educación la Ciencia y la Cultura (UNESCO, Observatorio Regional de la Sociedad de la Información, Consejo Nacional para el Desarrollo y la Inclusión de las Personas con Discapacidad (CONADIS, entre otras. Complementa este ensayo los resultados positivos de experiencias utilizando los desarrollos tecnológicos actuales, que hacen posible presentar una propuesta basada en videoconferencia de escritorio, la cual es económica, de fácil y rápida implementación y que puede utilizarse para atender la educación de las perso nas con diversidad funcional para caminar en búsqueda de su integración educativa.

  15. Estrategias para el aprendizaje de las funciones reales con la plataforma Moodle

    Directory of Open Access Journals (Sweden)

    Andrés Sánchez

    2015-08-01

    Full Text Available El presente artículo se enmarca dentro de la línea de investigación, Didáctica y Tecnología Educativa de la Universidad Pedagógica Experimental Libertador “Gervasio Rubio”. Su propósito, es analizar la incidencia de la plataforma moodle en el uso de las estrategias de aprendizaje para la enseñanza de las matemáticas específicamente sobre las funciones reales, impartida en la educación media. El enfoque se basa en el apoyo de esta plataforma, como medio que facilita el desarrollo del aprendizaje cognitivo y propicia las competencias en el área de las matemáticas. La investigación, se soporta mediante el estudio y el alcance de las teorías de aprendizaje, asimismo se destaca el desarrollo de las competencias matemáticas mediante el uso de estrategias formativas apoyadas por las tecnologías cuando los estudiantes abordan los contenidos sobre algunas funciones reales. Finalmente, se definen estrategias educativas a través del uso de la plataforma moodle para contribuir con el aprendizaje y dominio de determinadas habilidades matemáticas.

  16. Funciones ejecutivas y sintomatología asociada con los trastornos de la conducta alimentaria

    Directory of Open Access Journals (Sweden)

    Nayelli Alvarado Sánchez

    2014-01-01

    Full Text Available Estudios recientes coinciden en que las pacientes con trastornos de la conducta alimentaria (TCA presentan ineficiencias en las funciones ejecutivas secundarias al padecimiento. Así, el objetivo de este trabajo fue explorar la posibilidad de que tales ineficiencias formen parte del endofenotipo de los TCA y que no sean únicamente consecuencias de los mismos. Para ello, se evaluaron 69 mujeres: 23 con TCA, 23 con sintomatología asociada a los TCA y 23 sin sintomatología de riesgo a desarrollarlas. Todas las participantes respondieron el cuestionario de actitudes hacia la alimentación, la entrevista diagnóstica de trastornos alimentarios-IV, la Torre de Londres y la prueba de clasificación de tarjetas de Wisconsin. Los resultados mostraron ineficiencias en las funciones ejecutivas, específicamente en la planeación y en la flexibilidad de pensamiento, en el grupo con sintomatología asociada a los TCA similares a las que presentaron las participantes con TCA; hallazgos que abren la posibilidad de que las dificultades sean previas al establecimiento y que incluso pudiesen constituirse como un factor de riesgo

  17. Funciones ejecutivas y sintomatología asociada con los trastornos de la conducta alimentaria

    Directory of Open Access Journals (Sweden)

    Nayelli Alvarado Sánchez

    2014-01-01

    Full Text Available Estudios recientes coinciden en que las pacientes con trastornos de la conducta alimentaria (TCA presentan ineficiencias en las funciones ejecutivas secundarias al padecimiento. Así, el objetivo de este trabajo fue explorar la posibilidad de que tales ineficiencias formen parte del endofenotipo de los TCA y que no sean únicamente consecuencias de los mismos. Para ello, se evaluaron 69 mujeres: 23 con TCA, 23 con sintomatología asociada a los TCA y 23 sin sintomatología de riesgo a desarrollarlas. Todas las participantes respondieron el cuestionario de actitudes hacia la alimentación, la entrevista diagnóstica de trastornos alimentarios-IV, la Torre de Londres y la prueba de clasificación de tarjetas de Wisconsin. Los resultados mostraron ineficiencias en las funciones ejecutivas, específicamente en la planeación y en la flexibilidad de pensamiento, en el grupo con sintomatología asociada a los TCA similares a las que presentaron las participantes con TCA; hallazgos que abren la posibilidad de que las dificultades sean previas al establecimiento y que incluso pudiesen constituirse como un factor de riesgo.

  18. Condições referidas de saúde e grau de incapacidade funcional em idosos

    Directory of Open Access Journals (Sweden)

    Inacia Sátiro Xavier de França

    2011-01-01

    Full Text Available El objetivo fue investigar la condición de salud y estimar la discapacidad funcional para actividades diarias en ancianos adscriptcs a Unidades Básicas de Salud en el casco urbano de Campina Crande-Pk. Estudio epidemiológico, realizado con 36 ancianos. Se utilizó cuestionario socio-demográfico e Índice de Barthel. La edad de los ancianos varió de 65 a 90 años, 72% era jubilado y 100% de la población tenía sólo Enseñanza Primaria y residía con familiares. Los problemas de salud comunes fueron: hipertensión (49%, dolor (18%, incontinencia urinaria (12% Ydiabetes mellítus (9%. Se identificó: discapacidad funcional moderada (34% Ygrave (8%. Los ancianos demandaban: consulta médica (25(}b, pruebas de laboratorio (25%, medicamentos (19%, prótesis dental (72%, dentadura (22% Ybastón (6%. Son necesarios profesionales de salud capacitados en gerontología y geriatría, para asegurar una atención integral, que garanta la calidad de la atención de la salud del anciano.

  19. El “cuplón”; unidad funcional del acoplamiento contráctil.

    Directory of Open Access Journals (Sweden)

    Eduardo Rios

    2014-07-01

    Full Text Available Este artículo examina la evolución del concepto de cuplón, unidad funcional del acoplamiento contráctil, originado hace más de quince años con los colegas Gonzalo Pizarro y Michael Stern. Este examen nos permitirá poner al día avances en el estudio del acoplamiento entre la excitación de origen nervioso y la contracción muscular. Como se verá, la investigación en el tema ha tenido recientemente un claro viraje hacia la búsqueda de formas de aplicación de los conceptos básicos en la prevención y el tratamiento de varias enfermedades. A su vez, el estudio de mutaciones hereditarias en las proteínas del cuplón permitió nuevos avances en la comprensión de las interrogantes más básicas (cuáles son sus funciones y sus interacciones supramoleculares en una feliz y bastante inesperada potenciación mutua entre enfoques muy diferentes de la realidad. Este artículo sigue un desarrollo iterativo, describiendo primero los aspectos básicos del tema, pasando luego a los estudios aplicados, y a través de ellos volviendo a cuestiones fundamentales, ahora en pleno proceso de esclarecimiento.

  20. Autoeficacia, desesperanza aprendida e incapacidad funcional en pacientes con diagnóstico de artritis reumatoide

    Directory of Open Access Journals (Sweden)

    Stefano Vinaccia

    2005-01-01

    Full Text Available El objetivo de este estudio descriptivo fue estudiar la relación entre autoeficacia, desesperanza aprendida e incapacidad funcional en pacientes con diagnóstico de artritis reumatoide y así determinar el papel de los factores psicológicos en la adaptación del paciente a la enfermedad. Se aplicó el Cuestionarios de Actividades de la Vida Diaria, el Indice de Actitudes Reumatoides y la Escala de Autoeficacia para la Artritis a 79 pacientes en tratamiento en la unidad de reumatología de la Clínica Bolivariana de Medellín (Colombia. Se encontró que la autoeficacia percibida se asocia negativamente con la desesperanza, el dolor y la incapacidad funcional. A su vez, estas tres variables se relacionaron entre sí de forma positiva. De lo anterior se puede concluir que una adecuada autoeficacia permitiría asumir de manera más favorable la enfermedad y adaptarse a los cambios que ella conlleva. La desesperanza se asoció de manera significativa con el dolor, y éste con la incapacidad, por lo que se puede inferir, una relación indirecta con la desesperanza. Los resultados confirman el peso significativo que tienen las variables psicológicas estudiadas sobre la artritis reumatoide y que tenerlas en cuenta podría modificar potencialmente la experiencia de la enfermedad.

  1. EDUCACIÓN DE PERSONAS CON DIVERSIDAD FUNCIONAL. ALGUNOS APUNTES HISTÓRICOS

    Directory of Open Access Journals (Sweden)

    Daniel Fernández Fernández

    2016-01-01

    Full Text Available El presente artículo forma parte de un proyecto de investigación desarrollado en el Instituto de Investigación en Educación de la Universidad de Costa Rica (INIE/UCR, titulado “Diversidad sexual y diversidad funcional. Análisis de la (reproducción de subalternidades en el sistema educativo costarricense”. El principal objetivo del este trabajo consiste en analizar los emplazamientos que históricamente han ocupado aquellos cuerpos signados como “discapacitados” en el sistema educativo costarricense. Para ello, se tomaron como referencia documentos nacionales que datan desde finales del siglo XIX y principios del XXI (informes institucionales de labores, leyes y reglamentos, noticias, boletines y revistas informativas de educación, mediante un abordaje metodológico que conjuga la perspectiva foucaultiana del discurso con un enfoque histórico transversal. Algunas de las reflexiones desarrolladas aquí muestran que el discurso institucional sobre la diversidad funcional se materializa en una serie de estrategias que apuntan a un ordenamiento de los cuerpos especialmente abocado a convertirlos en elementos útiles y capitalizables (plusvalor para el sistema, mediante ocupaciones laborales específicas.

  2. Funciones y estructura de ingeniería social del nuevo gobierno local

    Directory of Open Access Journals (Sweden)

    José Vargas Hernández

    2015-04-01

    Full Text Available Este trabajo tiene como objetivo analizar las funciones y estructura de ingeniería social del nuevo gobierno local para dar respuesta a las demandas sociales, promover el desarrollo y regular los nuevos servicios públicos. A partir de una delimitación de los conceptos de soberanía y autonomía del nuevo gobierno local, se reconfigura una nueva estructura de gobernabilidad de los gobiernos locales que implica una mayor participación ciudadana en los procesos de toma de decisiones y la formulación de las políticas públicas, mediante la facilitación de procesos de descentralización de funciones y mecanismos coordinadores de servicios públicos. Finalmente se analizan las implicaciones en la gobernabilidad de la ingeniería social del nuevo gobierno local.

  3. Evidencia y neurociencias cognitivas: El caso de la resonancia magnética funcional

    Directory of Open Access Journals (Sweden)

    A. Nicolás Venturelli

    2015-12-01

    Full Text Available La resonancia magnética funcional es una de las técnicas de neuroimagen más difundidas en las neurociencias cognitivas. Su influencia tuvo un rol importante en la configuración del costado experimental de este campo. Frente a esto, consideramos que su estatus como evidencia no sido suficientemente discutido en la literatura filosófica. Aquí nos centramos sobre este punto desde la óptica de la tensión clásica sobre el alcance de los enfoques localizacionistas en neurociencias. Atendemos al modo en que esta tensión se manifiesta hoy. Tomamos en cuenta un número de limitaciones que presenta la resonancia magnética funcional y analizamos el modo en que los investigadores les hacen frente. En función de esto, sostenemos que existe una medida importante en que la técnica puede ser orientada sobre la base de supuestos y consideraciones teóricas generales. Para sustentar nuestras ideas, tomamos algunos ejemplos recientes de abordajes neurocientíficos caracterizados por abordar de manera directa el carácer dinámico de la actividad a gran escala en el cerebro.

  4. Significado de las funciones familiares en adolescentes italianos. Nuevas fronteras entre paterno y materno

    Directory of Open Access Journals (Sweden)

    Massimiliano Sommantico

    2008-01-01

    Full Text Available El presente estudio tuvo como objetivo explorar el significado que una muestra de adolescentes y adolescentes tardíos del sur de Italia atribuye a las funciones familiares, para analizar la relación entre la percepción de las transformaciones de las funciones paternas y maternas -en particular la carencia de roles normativos y de contención afectiva- y la agresividad como modalidad preferencial de gestión del conflicto. Se aplicó un diferencial semántico (DF, De Rosa, Parrello, & Sommantico, 2006 y un instrumento de agresividad, adaptado a población europea (AQ, Buss & Perry, 1992, 2003 a 259 sujetos, de edad comprendida entre los 17 y los 35 años, divididos en dos grupos, 139 de bachillerato y 120 de licenciatura. Los resultados del análisis del DF indicaron un perfil monofactorial, a diferencia del trifactorial obtenido por Osgood, Suci y Tannembaum (1957, mientras que en el AQ se encontraron diferencias significativas entre la media de la agresividad general (E=2,73 y factores del instrumento como agresividad verbal (E=3,29, la rabia (E=2,86 y hostilidad (E=2,86. Se concluye que las cualidades de tamaño y seguridad le son atribuidas específicamente a la madre, y que el nivel de agresividad verbal supera el índice de agresividad general.

  5. Os efeitos do alfabetismo funcional sobre a empregabilidade dos trabalhadores brasileiros

    Directory of Open Access Journals (Sweden)

    Cristiano Machado Costa

    2014-06-01

    Full Text Available Este trabalho utiliza a pesquisa Indicador de Alfabetismo Funcional (Inaf, realizada entre 2001 e 2007, para investigar os efeitos do alfabetismo funcional sobre a empregabilidade dos trabalhadores brasileiros, ressaltando as diferenças entre sexos e setores econômicos. Utilizando modelos probit e controlando para características observáveis dos indivíduos, os resultados apontam para uma maior importância das habilidades funcionais entre as mulheres. O efeito do aumento em um desvio-padrão na nota do Inaf resulta em crescimento de 6,10 p.p. na probabilidade de a mulher estar empregada. O indicador não se mostra significativo com relação à empregabilidade dos homens brasileiros, exceto no setor comercial, em que o aumento de um desvio-padrão no score Inaf eleva a probabilidade de um indivíduo estar empregado em 4 p.p. O setor comercial caracteriza-se pela maior interação entre os profissionais e os clientes, demandando habilidades funcionais que, muitas vezes, não são capturadas por meio das estatísticas usuais de escolaridade (nível e/ou anos de estudo.

  6. Compendium of the 'Manual of Substations Design' to the company supplies Luz y Fuerza del Centro, Mexico; Compendio del 'Manual de diseno de subestaciones' de la empresa suministradora Luz Y Fuerza del Centro, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Lorenzana, Arturo Lopez Malo [Luz y Fuerza del Centro, Mexico D.F. (Mexico)]. E-mails: arlopemalo@hotmail.com; larturo@itesm.mx

    2004-07-01

    In 'Luz y Fuerza del Centro (LFC)', a company which supplies electric power in the middle of the Mexico from 100 years ago, are used substations (S.E.'s) in strains of 400, 230, 85, 23 and 6 kV, with a total of 189 conventional and 32 isolated in sulfur hexafluoride (SF{sub 6}). This paper, briefly outline the contents of the 'Manual of Substations Design', in which describing aspects that must be met by conventional models of substations that builds the tensions mentioned in LFC. (author)

  7. Técnicas de neuroimagen funcional neurológica en niños y adolescentes

    OpenAIRE

    Madrid, Antonio

    2014-01-01

    Técnicas de neuroimagen funcional neurológica en niños y adolescentes 1º Definición. 2º Tipos de técnicas de neuroimagen funcional neurológica. 3º Fundamentos básicos. 4º Indicaciones y utilidad clínica. Conferencia incluida en el Ier. Curso de Especialización en Neuropsicología Clínica Infanto-Juvenil (Titulo Propio de la UMA). Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.

  8. Efeitos do destreinamento físico na capacidade funcional de idosos submetidos a um programa de treinamento resistido

    OpenAIRE

    Santana, Frederico Santos de

    2010-01-01

    A redução ou interrupção de treinamento resistido (TR) é denominada destreinamento (DT). Alguns trabalhos analisaram o impacto do DT nas aptidões físicas de idosos, porém poucos estudos investigaram os efeitos do DT na capacidade funcional de idosos. OBJETIVO - comparar a capacidade funcional de idosos após períodos de DT de 6 e 16 semanas. MÉTODOS - a amostra foi constituída de 42 indivíduos idosos, divididos em 2 grupos: DT curto (GC) e DT longo (GL), com n de 11 e 31, respectivamente. Fora...

  9. Influência das fases do ciclo menstrual no desempenho funcional de mulheres jovens e saudáveis

    OpenAIRE

    Kami, Aline Tiemi; Vidigal, Camila Borecki; Macedo, Christiane de Souza Guerino

    2017-01-01

    RESUMO Os hormônios sexuais femininos como estrogênio e progesterona têm relação com receptores específicos localizados em regiões cerebrais e podem influenciar o controle motor. Analisou-se o desempenho funcional nas diversas fases do ciclo menstrual em mulheres jovens e saudáveis. O estudo caracteriza-se como transversal e incluiu 13 mulheres saudáveis com ciclo menstrual regular e que não faziam uso de contraceptivo oral. Para a avaliação do desempenho funcional foram utilizados os testes ...

  10. Funciones ejecutivas, rasgos de personalidad y rendimiento académico en estudiantes universitarios de ciencias de la salud

    OpenAIRE

    Rodríguez Portuguez, Gabriel

    2016-01-01

    [ES]Introducción: Diferentes investigaciones han estudiado las funciones ejecutivas, el rendimiento académico y los factores de personalidad en estudiantes. El objetivo principal del presente trabajo de Tesis Doctoral es estudiar y analizar la relación entre las funciones ejecutivas, los rasgos de personalidad y el rendimiento académico en estudiantes universitarios de Medicina, Farmacia y Psicología. Metodología: Han participado 100 estudiantes de Ciencias de la Salud, de los cuales 33 es...

  11. Representación automática de funciones en Excel y su aplicación docente

    OpenAIRE

    S. M. Martínez María-Dolores (ed); Bernal García, J. J.; Bernal Soto, P.

    2011-01-01

    Excel cuenta de forma estándar con numerosas funciones matemáticas predefinidas, de manera que a través de la creación de tablas de valores XY es posible representarlas. Pero lo que no se usa con tanta frecuencia es el hecho de que también podemos evaluar funciones con solo escribirlas como texto, y representarlas de forma directa, sin necesidad de elaborar tablas utilizando para ello los nombres dinámicos. Si además lo combinamos con la utilización de otras herramientas de dicha hoja de cálc...

  12. ANÁLISIS DE LAS FUNCIONES DEL PROFESORADO UNIVERSITARIO Y SUS LIMITACIONES PARA REALIZAR INVESTIGACIÓN

    OpenAIRE

    Marco Antonio Zamora Antuñano; Jesús Salvador Zamora Aboytes; José Antonio Cano López

    2009-01-01

    El trabajo que se presenta indaga las funciones del profesorado universitario, así como las causas y limitaciones para realizar investigación en la Universidad Tecnológica de San Juan del Río, Querétaro, México. El profesorado universitario debe atender a tres funciones representativas de esta profesión: la docencia y tutoría, la investigación y la gestión. Se empleó una metodología descriptiva, mediante la utilización de un cuestionario denominado (ISPPTC) como técnica de recogida de informa...

  13. Funciones de la supervición escolar en Venezuela. Aproximación a un modelo

    OpenAIRE

    Amada Mogollón de González

    2006-01-01

    Resumen:Esta investigación tiene como propósito presentar la aproximación a un Modelo para las funciones de la supervisión escolar en Venezuela sustentado en los ámbitos, acción supervisora y funciones denominadas: Técnicas, Administrativas, Sociales, de Asistencia y Mediación. El modelo se fundamentó teóricamente en Kaufman, Stufflebeam, Teoría de Sistemas de Bertalanffy, enfoque humanista y jerarquía de las necesidades de Maslow. Es una investigación de campo realizada en Venezuela en los e...

  14. 167. Estenosis mitral funcional y recurrencia de insuficiencia tras anuloplastia en la insuficiencia mitral isquémica crónica

    Directory of Open Access Journals (Sweden)

    C.E. Martín López

    2010-01-01

    Conclusiones: La anuloplastia mitral aporta una corrección efectiva y durable de la insuficiencia mitral isquémica crónica. Esta técnica puede inducir estenosis mitral funcional durante el ejercicio, debiéndose valorar, a largo plazo, un posible impacto adverso en la clase funcional y supervivencia.

  15. Situación funcional, autopercepción de salud y nivel de actividad física en pacientes con artrosis

    Directory of Open Access Journals (Sweden)

    Carmen Llanos Val Jiménez

    2017-04-01

    Conclusiones: En los pacientes con OA el dolor y la capacidad funcional son las dimensiones más afectadas. La situación funcional y la salud autopercibida son superiores en los pacientes activos, independientemente del número de articulaciones afectadas y de sus características sociodemográficas.

  16. Desenvolvimento de gelatina funcional de erva-mate Development of functional yerba-mate jelly

    Directory of Open Access Journals (Sweden)

    Kleber Alves Santos Berté

    2011-02-01

    Full Text Available O objetivo deste estudo foi desenvolver formulações para gelatina funcional com extrato de erva-mate verde e fibras solúveis como inulina (INU, frutooligossacarídeos (FOS e a polidextrose (PD, avaliando o efeito desses ingredientes na gelatina funcional por meio da análise física da textura (firmeza, consistência e coesividade, análise sensorial (sabor e preferência de compra e composição química. As formulações INU, PD e composição INU/PD/FOS apresentaram textura desejável para uma sobremesa de gelatina, não diferindo (P>0,05 do padrão com sacarose. Pela análise sensorial, a gelatina funcional com INU obteve o maior índice hedônico para sabor e preferência de compra acima de 70%, superior ao padrão. Considerando os resultados obtidos neste estudo, a aplicação tecnológica do extrato de erva-mate verde e das fibras solúveis apresenta evidente potencial para o desenvolvimento de alimentos saudáveis e funcionais.The objective of this study was to develop formulations for functional jelly with extract of green yerba-mate and soluble fibers as inulin (INU, fructooligosaccharides (FOS and polidextrose (PD, evaluating the effect of those ingredients in the functional jelly through texture physical analysis (firmness, consistence, cohesiveness, sensorial analysis (flavor and purchase preference and chemical composition. The formulations INU, PD and composition INU/PD/FOS presented desirable texture for jelly dessert and not differing (P>0.05 of the reference standard with sucrose. For the sensorial analysis the functional jelly with INU obtained the largest index hedonic for flavor and purchase preference above 70%, higher than the reference standard. Considering the results obtained in this study, the technological application of green yerba-mate extract and of soluble fibers, presents evident potential for the development of healthy and functional foods.

  17. Desempenho funcional de crianças com mielomeningocele Functional performance of children with myelomeningocele

    Directory of Open Access Journals (Sweden)

    Luanda André Collange

    2008-01-01

    Full Text Available Este trabalho visou analisar o impacto dos níveis de lesão, deambulação e alterações neurológicas associadas ao quadro clínico da mielomeningocele sobre o desempenho funcional de seus portadores. Neste estudo transversal prospectivo foram examinadas 40 crianças com mielomeningocele, avaliando-se nível de lesão, deambulação, malformação de Arnold-Chiari, hidrocefalia, hidromielia, medula ancorada e incontinência esfincteriana. O desempenho funcional foi avaliado pelo Pediatric Evaluation of Disability Inventory (PEDI, para um registro quantitativo da capacidade funcional e autonomia nas atividades cotidianas, nas áreas de autocuidado, mobilidade e função social. Os dados coletados foram analisados estatisticamente, estabelecendo-se o nível de significância em pThis study aimed at analysing the impact of level of lesion, locomotion, and neurological changes associated to meningomyelocele clinical framework concerning functional performance. For this prospective cross-sectional study 40 children with meningomyelocele were assessed as to level of lesion, ambulatory ability, Arnold-Chiari malformation, hydrocephalus, hydromyelia, tethered cord, and sphincter incontinence. Functional performance was evaluated by the Pediatric Evaluation of Disability Inventory (PEDI which quantitatively assesses functional performance and independence in daily activities in the areas of self-care, mobility, and social functioning. Collected data were statistically analysed and the significance level set at p<0.05. Lesion levels and ambulatory ability had a significant (p<0.01 impact on scores of all three PEDI areas. Limitation degree was found to be directly proportional to level of lesion. Functional performance was more severely affected in self-care and mobility activities, and the best functional scores being obtained in social functioning. In patients with thoracic lesion level, symptomatic hydromyelia proved to be a significant factor for

  18. Treinamento aerobio e resistido, qualidade de vida e capacidade funcional de hipertensas

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    Thais Inacio Rolim Povoa

    2014-01-01

    Full Text Available INTRODUÇÃO: Pacientes hipertensos podem apresentar comprometimento da qualidade de vida (QV e da qualidade de vida relacionada à saúde (QVRS, tanto pela hipertensão arterial (HA, quanto pelos eventuais efeitos adversos do tratamento. Exercícios físicos, aeróbios e resistidos, melhoram a performance cardiorrespiratória e neuromuscular, mas há poucas evidências sobre seus efeitos na QV, QVRS e capacidade funcional (CF em mulheres hipertensas. OBJETIVO: Avaliar e comparar os efeitos dos treinamentos aeróbio e resistido sobre a QV, QVRS e a capacidade funcional em hipertensas. MÉTODOS: Ensaio clínico randomizado, cego, com total de 18 sessões de exercícios. Foram incluídas mulheres hipertensas sob tratamento medicamentoso, não participantes de programas de exercícios, com 50 anos de idade ou mais, que não apresentaram arritmias e/ou alterações isquêmicas em teste ergométrico (protocolo de Bruce. A amostra foi randomizada como segue: grupo aeróbio (GA (n = 21 e grupo resistido (GR (n = 20. Intensidade GA: leve a moderada (Escala de Borg adaptada; GR: até 50-65% de 1 RM. Duas séries com 12 a 15 repetições. Antes e após a intervenção foram aplicados os questionários WHOQOL-bref (QV e SF-36 (QVRS e realizado o teste de caminhada de 6 minutos (TC6` para avaliar a CF. Estatística: testes Shapiro-Wilk, t de Student, Fisher, U de Mann-Whitney e Wilcoxon. Nível de significância: p 0,05. Após a intervenção houve melhora significativa em todos os domínios do WHOQOL-bref no GA e no GR houve melhora no domínio aspectos físicos. No SF-36, constatou-se melhora significativa em sete de oito domínios tanto no GA quanto no GR. Capacidade funcional: verificou-se melhora nos dois grupos (p < 0,001. CONCLUSÃO: Os dois tipos de treinamento melhoraram a QV e a CF e, dependendo dos objetivos estabelecidos, ambos podem ser eficazes.

  19. Farinha de banana verde como ingrediente funcional em produtos alimentícios

    Directory of Open Access Journals (Sweden)

    Andréa dos Anjos Silva

    2015-12-01

    Full Text Available RESUMO: Nos últimos anos, a banana verde tem despertado interesse do mercado consumidor, pois, além do aspecto nutricional, destaca-se a presença de compostos funcionais, em especial o amido resistente. Contudo, sua adstringência limita seu consumo e sua comercialização em forma de farinhas é a principal forma de consumo e utilização, como ingrediente funcional. O objetivo do presente trabalho foi avaliar os potenciais usos da farinha de banana verde (FBV na elaboração de produtos alimentícios e os principais métodos de obtenção, e seus efeitos sobre a qualidade físico-química, sensorial e funcional das farinhas obtidas. Fatores como tipo de cultivar ou variedade da fruta, presença ou ausência de casca, técnica de desidratação e condições de operação do equipamento influenciam as características físico-químicas, tecnológicas e funcionais da FBV. A FBV tem sido utilizada como ingrediente funcional na elaboração de diferentes produtos alimentícios, como pão, biscoito cookie, pré-mistura de bolo, snacks, nuggets e, sobretudo, na elaboração de massas alimentícias. De forma geral, o emprego de FBV e produtos alimentícios promove a melhoria de suas propriedades funcionais, devido ao aumento do teor de amido resistente, compostos fenólicos e da atividade antioxidante. A FBV também reduz o teor e a porcentagem de hidrólise do amido digerível e, consequentemente, do índice glicêmico dos produtos, que apresentaram potencial para compor a dieta, principalmente de indivíduos diabéticos e obesos. A FBV pode ser amplamente utilizada tanto pela indústria de alimentos (pães, biscoitos, macarrão, etc., como ingrediente na preparação de pratos prontos e na elaboração de produtos cárneos.

  20. Reparación de la insuficiencia mitral funcional mediante abordaje del aparato subvalvular. Resultados a medio plazo

    Directory of Open Access Journals (Sweden)

    Álvaro Pedraz-Prieto

    2017-07-01

    Conclusiones: El abordaje del aparato subvalvular en la reparación de la insuficiencia mitral funcional se presenta como una alternativa válida en el tratamiento de este tipo de insuficiencia, ofreciendo buenos resultados en lo que a evolución postoperatoria y tasa de recidiva a medio plazo se refiere.

  1. PROPUESTA METODOLÓGICA PARA DESARROLLAR UN PROGRAMA CON PROGRAMACIÓN ESTRUCTURADA A PARTIR DEL PARADIGMA FUNCIONAL

    Directory of Open Access Journals (Sweden)

    Omar Iván Trejos Buriticá

    2013-01-01

    Full Text Available El presente artículo es producto de un Proyecto de Investigación 1 desarrollado en el área de la programación de computadores y su relación con los procesos de aprendizaje que se involucran alrededor de ella. En este artículo se plantea una metodología para el desarrollo de programas que se basa en la programación estructurada, pero tomando como base los conceptos centrales del Paradigma Funcional para su desarrollo. Se busca con esta propuesta metodológica enfrentar y solucionar los tres grandes problemas de la programación e igualmente, se persigue la simplificación de la programación estructurada a partir de la utilización de funciones. Se acude a una concepción general del programa a realizar y se va desglosando poco a poco, al tiempo que se construyen funciones que cumplan con los micro-objetivos planteados. Se ha encontrado que, para los estudiantes, es una forma muy sencilla y simplificada de concebir tanto el paradigma estructurado como el paradigma funcional y que su relación facilita la comprensión de los conceptos asociados a dichos paradigmas.

  2. Water Tanks, File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer plants, sewer pumpstations, water plants, water tanks http://www.harfordcountymd.gov/gis/Index.cfm, Published in 2011, 1:1200 (1in=100ft) scale, Harford County Government.

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — Water Tanks dataset current as of 2011. File name = UTILITIES - PARTIAL Data is incomplete. Contains electric trans lines, electric substations, sewer plants, sewer...

  3. Aspectos esenciales de la gramática sistémica funcional

    OpenAIRE

    Martínez Lirola, María

    2007-01-01

    Este libro profundiza en los elementos esenciales de la Gramática Sistémica Funcional, cuyo representante más destacado es Michael Halliday. A partir del modelo integrador de descripción lingüística de Halliday, se abordan aspectos relativos a la función social de la lengua: la ideología, la situación tipo, el contexto cultural y las nociones de campo, tenor y modo. Además, se estudia la cuestión de la forma-función en lingüística, se presentan las principales diferencias entre las teorías fo...

  4. LA CONSTITUCIÓN COLOMBIANA Y LAS FUNCIONES GERENCIALES DEL SECTOR PÚBLICO

    Directory of Open Access Journals (Sweden)

    Silvia Elena González Bermúdez

    2009-01-01

    Full Text Available En este artículo, se identifican y analizan los artículos definidos en la Constitución Política Nacional de 1991, con las respectivas normas que los reglamentan, que deben aplicarse durante el ejercicio de la función administrativa en el sector público. El propósito es fundamentar la necesidad de consideración de la entidad pública bajo el concepto de empresa cuya gestión debe desarrollarse con la incorporación de las funciones del ciclo del proceso administrativo, establecidas en la teoría neoclásica de la administración con la combinación del marco jurídico aplicable a las entidades públicas, considerando la integralidad y coherencia que se debe tener como unidad de gestión.

  5. Desarrollo de un manual de funciones para la Cámara de Industrias de Costa Rica

    OpenAIRE

    López Motenegro, Roberto

    2004-01-01

    Tesis de maestría -- Universidad de Costa Rica. Posgrado en Administración y Dirección de Empresas. Maestría Profesional en Administración y Dirección de Empresas con énfasis en Gerencia, 2004 El objetivo general de este trabajo es abordar el estudio de la administración de los recursos humanos a partir de una de sus dimensiones como lo es el diseño y distribución de funciones en una organización. Para ello, complementa el trabajo de investigación bibliográfica con el trabajo de campo par...

  6. La dispepsia funcional: Aspectos biopsicosociales, evaluación y terapia psicológica

    Directory of Open Access Journals (Sweden)

    Stefano Vinaccia Alpi

    2008-09-01

    Full Text Available Se abordan los aspectos conceptuales del trastorno gastrointestinal Dispepsia funcional (DP, en lo que se refiere a su definición, prevalencia, clasificación y diagnóstico.; las causas y consecuencias de la DF desde una perspectiva biopsicosocial (variables socioeconómicas, demandas psicosociales, evaluación cognitiva y estrategias de afrontamiento, personalidad y comportamiento, mecanismos psicobiológicos, calidad de vida, tratamiento y evolución; la evaluación psicológica de la DF desde la perspectiva procesual; y la intervención psicológica, con énfasis en el enfoque cognitivo conductual.

  7. Desempeño en funciones ejecutivas en escolares por subtipo de TDAH

    OpenAIRE

    Rodríguez Sánchez, Sandra Catalina

    2012-01-01

    El objetivo de esta investigación fue comparar el desempeño en tareas de funciones ejecutivas en niños y niñas en edad escolar según el subtipo de Trastorno por Déficit de Atención con Hiperactividad (TDAH): Hiperactivo-impulsivo (TDAH-H), inatento (TDAH-I) y combinado (TDAH-C), comparados con un grupo de niños normales. La muestra fue 40 escolares entre 7 y 12 años, estrato socioeconómico muy bajo y bajo. El diseño fue descriptivo, comparativo, transversal y el análisis fue no paramétrico. S...

  8. Flexibilidad funcional en la dirección estratégica de los recursos humanos

    Directory of Open Access Journals (Sweden)

    Susana Fernández Pérez de la Lastra

    2015-01-01

    Full Text Available En los últimos años la literatura estratégica ha puesto especial énfasis en la flexibilidad de las estructuras y de los mecanismos de gestión, como una condición necesaria para competir en los entornos empresariales actuales. En el ámbito de la dirección estratégica de los recursos humanos, se observa una falta de consenso en la concreción del concepto de flexibilidad funcional teniendo implicaciones negativas para la investigación; además, existen escasos trabajos desarrollados en torno a este tópico. El artículo tiene como objetivo ofrecer una conceptualización general integradora de la flexibilidad estratégica de los recursos humanos, enfatizando en su dimensión funcional. Para desarrollar el análisis teórico propuesto, se siguió un diseño de investigación no experimental - documental, mediante la búsqueda sistemática de la literatura académica relevante, considerando tipos de publicaciones, bases de datos y palabras clave, con el objetivo de identificar y clasificar las contribuciones más importantes. Este análisis de la literatura tiene como resultado una definición de dicho constructo que recoge las distintas perspectivas así como la identificación de sus dimensiones. Igualmente se establece un modelo de medida fruto de la integración de varias escalas de medición validadas en la literatura organizativa.

  9. SIGNIFICADO DE LAS FUNCIONES FAMILIARES EN ADOLESCENTES ITALIANOS. NUEVAS FRONTERAS ENTRE PATERNO Y MATERNO

    Directory of Open Access Journals (Sweden)

    Maricela Osorio Guzmán

    2008-07-01

    Full Text Available El presente estudio tuvo como objetivo explorar el significado que una muestra de adolescentes y adolescentes tardíos del sur de Italia atribuye a las funciones familiares, para analizar la relación entre la percepción de las transformaciones de las funciones paternas y maternas —en particular la carencia de roles normativos y de contención afectiva— y la agresividad como modalidad preferencial de gestión del conflicto. Se aplicó un diferencial semántico (DF, De Rosa, Parrello, & Sommantico, 2006 y un instrumento de agresividad, adaptado a población europea (AQ, Buss & Perry, 1992, 2003 a 259 sujetos, de edad comprendida entre los 17 y los 35 años, divididos en dos grupos, 139 de bachillerato y 120 de licenciatura. Los resultados del análisis del DF indicaron un perfil monofactorial, a diferencia del trifactorial obtenido por Osgood, Suci y Tannembaum (1957, mientras que en el AQ se encontraron diferencias significativas entre la media de la agresividad general (ξ=2,73 y factores del instrumento como agresividad verbal (ξ=3,29, la rabia (ξ=2,86 y hostilidad (ξ=2,86. Se concluye que las cualidades de tamaño y seguridad le son atribuidas específicamente a la madre, y que el nivel de agresividad verbal supera el índice de agresividad general.

  10. Artropatia de manguito: o que esperar do resultado funcional da artroplastia reversa?

    Directory of Open Access Journals (Sweden)

    Rodrigo Caldonazzo Fávaro

    2015-10-01

    Full Text Available resumo Objetivo: Avaliar o resultado funcional da artroplastia reversa, suas complicações e relações com os tipos de lesões. Métodos: Foram tratados 27 ombros, de 26 mulheres e um homem. Os pacientes foram avalia dos pela escala funcional de UCLA. O modelo de implantes usado foi o Delta Xtend Depuy(r. As lesões foram classificadas segundo Seebauer para o grau de artropatia e Nerot para o notching. Resultado: Aidade média foi de 77,4 (67-89, o seguimento foi de 25,8 meses (6-51, o UCLA pré era de 10,1 (6-15 e o UCLA pós foi de 29,8 (22-35, com uma melhoria estatisticamente signi ficativa (p < 0,001. Pela classificação de Seebauer, cinco eram 1B, 19 eram 2 A e três eram 2 B. Tivemos 15 complicacões (55,5%, o notching foi o mais comum e ocorreu em 14 pacientes, nove deles grau I e cinco grau II, mas nenhum deles gerou instabilidade. Apenas uma paci ente (3,7% teve complicação maior, com luxacão no pós-operatório imediato. Dois pacientes (7,4% alegaram que não repetiriam o procedimento. Uma paciente (3,7% foi submetida a revisão. Conclusão: A artroplastia reversa mostrou-se uma excelente opção para o tratamento de pacientes com artropatia do manguito rotador com baixo índice de complicações maio res. O notching é uma complicação frequente, mas que na maioria dos casos não apresenta repercussão clínica

  11. Aproveitamento tecnológico do "mel de cacau" (Theobroma cacao L na produção de geleia sem adição de açúcar

    Directory of Open Access Journals (Sweden)

    Carine Oliveira dos Santos

    2014-09-01

    Full Text Available O "mel de cacau" é uma denominação regional do líquido transparente extraído da polpa do cacau, que cobre as sementes, antes do processo de fermentação do cacau. Este material é atrativo do ponto de vista de seus aspectos sensorial e tecnológico; entretanto, seu uso para o consumo ainda é restrito. O propósito deste estudo foi produzir geleia dietética usando o "mel de cacau" e realizar a caracterização química e sensorial dos produtos. Para a preparação das geleias, foram usados os seguintes ingredientes: pectina de baixo grau de metoxilação, polidextrose, sorbitol, maltitol, fosfato tricálcico, sorbato de potássio e cacau em pó. As geleias dietéticas estudadas foram: F1 (0,0015% taumatina e 0,005% sucralose; F2 (0,0015% taumatina e 0,002% acessulfame-k; F3 (0,005% sucralose e 0,002% acessulfame-k. Foi produzido, também, um tratamento-controle (com 40,0% de sacarose. Os dados químicos e sensoriais foram analisados por ANOVA, teste de Tukey e Mapa de Preferência Interno (MDPREF. O tratamento F3 (sucralose e acessulfame-k foi a geleia dietética preferida dos consumidores. Esta diferiu significativamente (p<0.05 dos tratamentos F1 (taumatina e sucralose e F2 (taumatina e acessulfame-k em relação aos atributos cor, aroma de chocolate, gosto doce, gosto ácido, sabor de chocolate e consistência; obteve, também, maior nota para intenção de compra. O uso do adoçante taumatina mostrou-se inadequado por não prover doçura à geleia de "mel de cacau". Os resultados indicaram a viabilidade do aproveitamento tecnológico do "mel de cacau" como matéria-prima na preparação de geleia dietética, que apresentou boas características sensoriais e nutricionais.

  12. Aproveitamento de águas pluviais e o reúso de águas cinzas em edifícios residenciais de Brasília – parte 1: reduções no consumo de água

    Directory of Open Access Journals (Sweden)

    Daniel Sant'Ana

    2013-12-01

    Full Text Available Sistemas de aproveitamento de águas pluviais(AAP e de reúso de águas cinzas (RAC sãoestratégias de gestão descentralizadas capazesde promover reduções na demanda urbanade água. No entanto, pouco se sabe sobre suaviabilidade para uma implementação estratégicaem edificações. Para avaliar a viabilidadedesses sistemas hidráulicos em edificações residenciais,é fundamental compreender o usodesagregado de água para estimar o potencialde redução no consumo de água e verificar aaplicabilidade, os custos e os benefícios deadaptação predial. O presente artigo foca nacaracterização dos usos-finais de água do estoquede edificações residenciais de Brasília, e naidentificação do potencial de redução do consumode água promovido por diferentes sistemasAAP e RAC. Em geral, resultados demonstramum alto índice de consumo de água em chuveiros(23,0%, máquinas de lavar roupa (21,4% edescargas sanitárias (15,3%. Já os usos externosde água representam uma pequena fraçãodo consumo predial total (3,5%. Em média, resultadosindicam que as áreas de cobertura sãocapazes de fornecer águas pluviais para suprir48% da demanda em lavagem de roupas, 60%em descargas sanitárias e 100% em lavagem depisos e irrigação. Sistemas de reúso de águascinzas apresentaram maiores valores de economiade água em lavagem de roupas (2.541m³/ano e descarga sanitárias (1.815 m³/ano.Ambos sistemas AAP e RAC são capazes depromover reduções equivalente a 811 m³/ano.

  13. Analysis, simulation and control of electromagnetic transients in gas insulated substations in SF6 by means of grounding grid; Analisis, simulacion y control de transitorios electromagneticos en subestaciones aisladas en SF6 por medio de redes de tierra

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Martinez, Gaston

    2007-12-15

    The use of SF6 substations is actually an extensive practice in industrial countries. Some of they replace conventional air substations and the others are new designs in the range of 34.5 kV to 1000 kV. During the switching events in a GIS substation, very fast transients overvoltage may appear and originate faults, malfunctions in the electronic and control equipment, besides the risk by electrical discharge in the personnel who are working in the substation. These overvoltage are produced by the collapse of the electric field on GIS terminals during switching events originating Very Fast Transient Overvoltage (VFTO) and the increase of the Transient Enclosure Voltage (TEV). This investigation is focused on diminishing the magnitude of the VFTO and TEV by designing and redesigning grounding grids for gas insulated substations in SF6. The objective of this work is to design a grounding grid for an air substation and redesign it for a GIS substation. The computer simulation uses a detailed model of the substation in SF6 interconnected with an aerial grounding grid and by adding methodologically grounding rods, the VFTO and TEV within the GIS are reduced. The results of the computer simulation show that the designed grounding grid allows considerably diminishing the magnitude of the VFTO; nevertheless this design doesn't appropriately attenuate the TEV magnitude. [Spanish] Hoy en dia, el uso de subestaciones GIS se ha generalizado. Algunas reemplazan a las subestaciones aereas y otras son de nueva creacion y se instalan en tensiones de 34.5kV hasta 1000 kV. Durante las operaciones de maniobra de la subestacion GIS, se presentan sobretensiones transitorias ultra rapidas que pueden dar origen a diversas fallas, a un malfuncionamiento del equipo electronico y de control asi como el riesgo por descarga electrica al personal que labora en la subestacion. Estas sobretensiones se producen debido al colapso del campo electrico en terminales del interruptor ante

  14. Integration of three-dimensional modelling, scientific visualization and virtual reality applied to electric power substations; Integracao de modelagem tridimensional, visualizacao cientifica e realidade virtual com aplicacao em subestacoes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Buriol, Tiago Martinuzzi; Scheer, Sergio [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Centro de Estudos de Engenharia Civil]. E-mails: tiagoburiol@gmail.com; scheer@ufpr.br

    2007-04-15

    The Virtual Reality technology (VR) is considered the most advanced human/computer interface ever known, with applications in several fields of science and engineering. In the energy sector, research has been carried out aiming at applying this technology in planning, training and simulation activities. In this work a few possible VR applications related to power substations are presented. Aspects of modelling, navigation, and scientific visualization are addressed. In addition, an application for the visualization of illuminance fields is presented. (author)

  15. Un método de captura de choques basado en las funciones de forma para Galerkin discontinuo de alto orden

    OpenAIRE

    E. Casoni; Peraire, J.; Huerta, A.

    2012-01-01

    En este artículo se presenta un método de alto orden de Galerkin discontinuo para problemas de flujo com- presible, en los cuales es muy frecuente la aparición de choques. La estabilización se introduce mediante una nueva base de funciones. Esta base tiene la flexibilidad de variar localmente (en cada elemento) entre un espacio de funciones polinómicas continuas o un espacio de funciones polinómicas a trozos. Así, el método propuesto proporciona un puente entre los métodos estándar de alto or...

  16. Mobilidade e independência funcional em hemiplégicos pós - Acidente Vascular Encefálico

    OpenAIRE

    Gusmão, Cristiane Aguiar

    2013-01-01

    Os indivíduos com sequela de Acidente Vascular Encefálico (AVE) apresentam alterações motoras e sensitivas que interferem em sua independência funcional e mobilidade. O objetivo deste estudo foi correlacionar a mobilidade com a independência funcional em pessoas com sequelas de AVE. Os 19 participantes do estudo foram avaliados através da Medida de Independência Funcional (MIF) e do Timed Up and Go (TUG). A análise descritiva dos dados foi realizada através de porcentagem, média e desvio padr...

  17. Dor neuropática central após lesão medular traumática: capacidade funcional e aspectos sociais

    OpenAIRE

    Janaina Vall; Violante Augusta Batista Braga

    2005-01-01

    Estudo de caso comparativo com o objetivo de avaliar a capacidade funcional e os aspectos sociais de dois pacientes, ambos com lesão medular traumática, sem e com dor neuropática central associada, respectivamente. Para avaliar a capacidade funcional, foi utilizado como instrumento o Functional Independence Measure ou Escala de Independência Funcional. E para avaliar os aspectos sociais foi construído o ecomapa de cada paciente, preconizado pelo modelo Calgary de avaliação de famílias. Ambos ...

  18. Riesgo familiar total en familias con escolares según rendimiento académico Total family risk in families with schoolchildren according to academic performance Risco familiar total em famílias com escolares conforme aproveitamento acadêmico

    Directory of Open Access Journals (Sweden)

    CATAÑO ORDÓÑEZ NHORA

    2009-12-01

    analytic component and a quantitative approach; the sample was 186 families during the period April-July 2007. The results show a predominance of nuclear families in both groups (65%, reverse relation between the family risk evaluated by the RFT 7-70 instrument and the academic performance of the family´s schoolchild, that is to say that the families that recorded a high risk (9% and average risk (31% are, to a large extent, families with schoolchildren that show low academic performance, in respect of the predominance of low family risk (78% in families with children that show high academic performance. The t of student was applied to differentiate averages and association was found (P = 0,02 between the total high family risk and the low academic performance of the schoolchild. In conclusion, these results suggest mainly that risk factors that determine higher family risk in families with schoolchildren who show low academic performance must be prioritized and that integral healthcare must be provided with a family and intersectorial approach as well as active participation from the community. Continue research activities in possible associations between individual health, health practice, and education, socio-economic and psycho-affective environment of the family and academic achievement of schoolchildren in families with school age children.Este artigo apresenta os resultados de um levantamento que objetiva estabelecer as diferenças no risco familiar entre dois grupos de famílias: com crianças escolares de alto aproveitamento acadêmico e crianças escolares de baixo aproveitamento acadêmico em um centro educativo distrital de Bogotá. Metodologia: levantamento descritivo comparativo transversal com um componente analítico e abordagem quantitativa; a amostra foi de 186 famílias, durante abril - julho de 2007. Os resultados apresentam predomínio de famílias nucleares em ambos os grupos (65%, relação inversa entre o risco familiar total avaliado pelo

  19. Riesgo familiar total en familias con escolares según rendimiento académico Risco familiar total em famílias com escolares conforme aproveitamento acadêmico Total family risk in families with schoolchildren according to academic performance

    Directory of Open Access Journals (Sweden)

    CAROLINA LUCERO ENRÍQUEZ GUERRERO

    Full Text Available Este artículo presenta los resultados del estudio cuyo objetivo fue establecer las diferencias en el riesgo familiar entre dos grupos de familias: con niños escolares de alto rendimiento y niños de bajo rendimiento académico en un centro educativo distrital de Bogotá. Metodología: estudio descriptivo comparativo transversal con un componente analítico y abordaje cuantitativo; la muestra fue de 186 familias, durante abril a julio de 2007. Los resultados muestran predominio de familias nucleares en ambos grupos (65%, relación inversa entre el riesgo familiar total evaluado por el instrumento RFT 7-70 y el rendimiento académico del escolar de la familia, es decir que las familias que registraron riesgo alto (9% y medio (31% en mayor proporción son familias con escolares de bajo rendimiento académico, frente al predominio del riesgo familiar bajo (78% en las familias con niños de alto rendimiento. Se aplicó t de student para diferencia de medias y se encontró asociación (P = 0,02 entre el riesgo familiar total alto y el bajo rendimiento académico del escolar. En conclusión, estos resultados sugieren principalmente que se deben priorizar los factores de riesgo que determinan mayor riesgo familiar en familias con escolares de bajo rendimiento académico y dar atención de salud integral con enfoque familiar e intersectorial, y participación activa de la comunidad. Continuar investigando en posibles asociaciones entre salud individual, prácticas de salud, educación, ambiente socioeconómico y psicoafectivo de la familia y el logro educativo de escolares en familias con niños en edad escolar.Este artigo apresenta os resultados de um levantamento que objetiva estabelecer as diferenças no risco familiar entre dois grupos de famílias: com crianças escolares de alto aproveitamento acadêmico e crianças escolares de baixo aproveitamento acadêmico em um centro educativo distrital de Bogotá. Metodologia: levantamento descritivo

  20. Avaliação da capacidade funcional e pulmonar em pacientes pediátricos transplantados renais

    Directory of Open Access Journals (Sweden)

    Renata Salatti Ferrari

    2013-03-01

    Full Text Available INTRODUÇÃO: Pacientes pediátricos submetidos a transplante renal podem apresentar alterações na função pulmonar, bem como na capacidade funcional para o exercício. OBJETIVO: Avaliar a capacidade funcional e capacidade pulmonar de crianças e adolescentes submetidas a transplante renal. MÉTODO: Foram avaliadas crianças e adolescentes com idade entre 6 e 18 anos em acompanhamento no ambulatório de Nefrologia do Hospital da Criança Santo Antônio, Santa Casa de Porto Alegre-RS, Brasil, no período de junho de 2010 a março de 2011. A capacidade pulmonar foi avaliada por meio da espirometria e das pressões respiratórias máximas e a capacidade funcional pelo Teste da Caminhada dos 6 minutos (TC6. RESULTADOS: A amostra foi composta por 25 pacientes, sendo 14 (56% do sexo masculino, com média de idade de 13,5 ± 3,3 anos. Destes, 19 (76% realizaram hemodiálise anterior ao transplante. A média da Capacidade Vital Forçada (CVF foi 97,91 ± 24,32% e o Volume Expiratório Forçado no primeiro segundo (VEF1 foi 100,53 ± 17,66% do valor predito. No TC6, os pacientes caminharam 229,14 metros menos do que o predito (p < 0,001. A Pressão Inspiratória Máxima (PiMáx foi significativamente menor que o predito, com uma diferença de -24,63 cmH2O (p = 0,03, assim como a Pressão Expiratória Máxima (Pe-Máx, com uma diferença de 49,27 cmH2O (p < 0,001. Ao correlacionarmos capacidade funcional, espirometria e pressões respiratórias máximas, encontramos associação entre CVF e TC6 (r = 0,52, p = 0,01 e CVF e PiMáx (r = 0,54 e p = 0,01. CONCLUSÃO: Os pacientes transplantados apresentaram diminuição da capacidade funcional, bem como das pressões respiratórias máximas. Quanto melhor a capacidade funcional e a PiMáx, melhor a CVF.

  1. Lo orgánico y lo funcional en psiquiatría

    Directory of Open Access Journals (Sweden)

    Roberto Anselmo Ramos Valverde

    2014-08-01

    Full Text Available El desarrollo acelerado de las neurociencias en las últimas dos décadas permitió rescatar al cerebro de las sombras cartesianas donde se encontraba condenado, demostrándose que todo fenómeno psíquico, normal o morboso, tiene como sustento material a este órgano gestor de las funciones psíquicas. De esta manera quedó esclarecido que los trastornos mentales desencadenados por acontecimientos psicosociales estresantes actúan sobre el cerebro, provocando cambios neuroquímicos a nivel molecular responsables de la sintomatología que los tipifica, conjugándose etiopatogénicamente los factores biológicos, psicológicos y sociales gestores de estos desórdenes mentales. (1 Se distinguen en psiquiatría dos tipos de perfiles clínicos que los clásicos semiólogos clasificaron en síndromes orgánicos y funcionales; los primeros causados por alteraciones estructurales a nivel histopatológico en el cerebro o sus envolturas, nombradas afecciones orgánicas propiamente dichas, y síntomáticas cuando afectan el metabolismo cerebral a distancia; los segundos sustentan los cambios a nivel molecular, afectando la constitución química del cerebro por factores psicosociales, hereditarios y congénitos. (1 Los avances neurobiológicos esclarecen la multicausalidad de los trastornos mentales y el papel organogénico del cerebro, sustentado en su capacidad intrínseca de reflejar la realidad objetiva, que al perderse origina el espectro psicopatológico que hoy conocemos. (2 Algunos autores contemporáneos a partir del resurgimiento del protagonismo cerebral en la cristalización de los trastornos mentales, plantean que las fronteras entre lo orgánico y lo funcional se quebraron y que la enfermedad mental es orgánica en toda su extensión dada la obligada participación etiológica del cerebro. Soy del criterio que la actual omnipresencia cerebral en la generación de los procesos psicológicos, es sin duda, una virtud trascendente de la ciencia

  2. Occupational exposure to electric and magnetic fields during tasks at ground or floor level at 110 kV substations in Finland.

    Science.gov (United States)

    Korpinen, Leena; Pääkkönen, Rauno

    2016-09-01

    The aim was to investigate occupational exposure to electric and magnetic fields during tasks at ground or floor level at 110 kV substations in Finland and to compare the measured values to Directive 2013/35/EU. Altogether, 347 electric field measurements and 100 magnetic field measurements were performed. The average value of all electric fields was 2.3 kV/m (maximum 6.4 kV/m) and that of magnetic fields was 5.8 µT (maximum 51.0 µT). It can be concluded that the electric and magnetic field exposure at ground or floor level is typically below the low action levels of Directive 2013/35/EU. The transposition of the directive will not create new needs to modify the work practice of the evaluated tasks, which can continue to be performed as before. However, for workers with medical implants, the exposure may be high enough to cause interference.

  3. Numerical evaluation of currents induced in a worker by ELF non-uniform electric fields in high voltage substations and comparison with experimental results.

    Science.gov (United States)

    Tarao, Hiroo; Korpinen, Leena H; Kuisti, Harri A; Hayashi, Noriyuki; Elovaara, Jarmo A; Isaka, Katsuo

    2013-01-01

    An ungrounded human, such as a substation worker, receives contact currents when touching a grounded object in electric fields. In this article, contact currents and internal electric fields induced in the human when exposed to non-uniform electric fields at 50 Hz are numerically calculated. This is done using a realistic human model standing at a distance of 0.1-0.5 m from the grounded conductive object. We found that the relationship between the external electric field strength and the contact current obtained by calculation is in good agreement with previous measurements. Calculated results show that the contact currents largely depend on the distance, and that the induced electric fields in the tissues are proportional to the contact current regardless of the non-uniformity of the external electric field. Therefore, it is concluded that the contact current, rather than the spatial average of the external electric field, is more suitable for evaluating electric field dosimetry of tissues. The maximum induced electric field appears in the spinal cord in the central nervous system tissues, with the induced electric field in the spinal cord approaching the basic restriction (100 mV/m) of the new 2010 International Commission on Non-Ionizing Radiation Protection guidelines for occupational exposure, if the contact current is 0.5 mA. Copyright © 2012 Wiley Periodicals, Inc.

  4. Epinephrine, DNA integrity and oxidative stress in workers exposed to extremely low-frequency electromagnetic fields (ELF-EMFs) at 132 kV substations.

    Science.gov (United States)

    Tiwari, Ravindra; Lakshmi, N K; Bhargava, S C; Ahuja, Y R

    2015-03-01

    There is apprehension about widespread use of electrical and electromagnetic gadgets which are supposed to emit electromagnetic radiations. Reports are controversy. These electromagnetic fields (EMFs) have considerable effect on endocrine system of exposed subjects. This study was focused to assess the possible bioeffects of extremely low-frequency (ELF)-EMFs on epinephrine level, DNA damage and oxidative stress in subjects occupationally exposed to 132 kV high-voltage substations. The blood sample of 142 exposed subjects and 151 non-exposed individuals was analyzed. Plasma epinephrine was measured by enzyme-linked immunosorbent assay, DNA damage was studied by alkaline comet assay along with oxidative stress. Epinephrine levels of sub-groups showed mean concentration of 75.22  ±  1.46, 64.43  ±  8.26 and 48.47  ±  4.97 for high, medium and low exposed groups, respectively. DNA damage ranged between 1.69 µm and 9.91 µm. The oxidative stress levels showed significant increase. The individuals employed in the live-line procedures were found to be vulnerable for EM stress with altered epinephrine concentrations, DNA damage and increased oxidative stress.

  5. Correlação entre a dinamometria e teste funcional em atletas de handebol

    Directory of Open Access Journals (Sweden)

    Fabiano Fernandes da Silva

    2014-06-01

    Full Text Available INTRODUÇÃO: São poucas as informações que relacionam testes funcionais com testes mais precisos, como a dinamometria isocinética. OBJETIVO: Correlacionar as variáveis isocinéticas pico de torque (PT, potência média (PM e trabalho total (TT de rotadores internos de ombro em atletas de handebol do gênero masculino com o teste funcional de arremesso de medicine ball (AMB. MÉTODOS: Participaram desse estudo 25 atletas amadores de handebol do gênero masculino com idade média 17,72 ± 2,16 anos. A coleta de dados foi realizada em dois dias diferentes, respeitando intervalo mínimo de 48 horas entre as sessões. De maneira aleatória, definida por sorteio, os atletas faziam o teste isocinético ou o teste de AMB. Para o teste de AMB, o atleta deveria arremessar uma medicine ball de 3 kg a maior distância possível. Para análise isocinética, foram utilizadas as velocidades de 60°/s e 180°/s avaliando a capacidade muscular dos músculos rotadores internos de ombro. Para análise de associações foram utilizados os testes de correlação de Pearson e regressão linear simples. RESULTADOS: Foram observadas associações moderadas (0,60 ≤ r < 0,70; p<0,05 para as variáveis PT, PM e TT e o teste de AMB na velocidade de 60°/s. Além disso, observaram-se associações altas (r ≥ 0,70; p<0,05 entre as variáveis estudadas na velocidade de 180°/s. CONCLUSÃO: As variáveis isocinéticas PT, PM e TT, de rotadores internos de ombro do braço dominante de atletas de handebol do gênero masculino apresentam correlação moderada a alta com o teste funcional de AMB.

  6. MAXWELL EQUATIONS FOR A GENERALISED LAGRANGIAN FUNCTIONAL ECUACIONES DE MAXWELL PARA UNA FUNCIONAL DE LAGRANGE GENERALIZADA

    Directory of Open Access Journals (Sweden)

    Héctor Torres-Silva

    2008-11-01

    Full Text Available This work deals with the problem of the construction of the Lagrange functional for an electromagnetic field. The generalised Maxwell equations for an electromagnetic field in free space are introduced. The main idea relies on the change of Lagrange function under the integral action. Usually, the Lagrange functional which describes the electromagnetic field is built with the quadrate of the electromagnetic field tensor . Such a quadrate term is the reason, from a mathematical point of view, for the linear form of the Maxwell equations in free space. The author does not make this assumption and nonlinear Maxwell equations are obtained. New material parameters of free space are established. The equations obtained are quite similar to the well-known Maxwell equations. The energy tensor of the electromagnetic field from a chiral approach to the Born Infeld Lagrangian is discussed in connection with the cosmological constant.Se aborda el problema de la construcción de la funcional de Lagrange de un campo electromagnético. Se introducen las ecuaciones generalizadas de Maxwell de un campo electromagnético en el espacio libre. La idea principal se basa en el cambio de función de Lagrange en virtud de la acción integral. Por lo general, la funcional de lagrange, que describe el campo electromagnético, se construye con el cuadrado del tensor de campo electromagnético. Ese término cuadrático es la razón, desde un punto de vista matemático, de la forma lineal de las ecuaciones de Maxwell en el espacio libre. Se obtienen las ecuaciones no lineales de Maxwell sin considerar esta suposición. Las ecuaciones de Maxwell obtenidas son bastante similares a las conocidas ecuaciones de Maxwell. Se analiza el tensor de energía del campo electromagnético en un enfoque quiral de la Lagrangiana de Born Infeld en relación con la constante cosmológica.

  7. PRODUÇÃO DE QUEIJO TIPO QUARK FUNCIONAL CONTENDO EXOPOLISSACARÍDEOS

    Directory of Open Access Journals (Sweden)

    Tatia Tie Yuhara

    2015-01-01

    Full Text Available Alimentos com bactérias probióticas ou prebióticos estão incluídos na categoria de alimentos contendo compostos bioativos que tem despertado interesse devido ao efeito benéfico sobre a saúde. O objetivo do trabalho foi a formulação de produto simbiótico e funcional com bactérias láticas probióticas produtoras de exopolissacarídeos (EPS. Para isto, promoveu-se a fermentação por 24 h a 37 ºC de soro de leite em pó e leite desnatado em duas formulações: “F1” contendo o prebiótico goma acácia e inoculada de bactéria probiótica Lactobacillus casei LC1, e “F2” formulada com inulina como prebiótico e fermentação por L. acidophilus LA5. Nos produtos fermentados foi determinada a quantidade de EPS produzida pelos diferentes probióticos e os valores encontrados foram de 103,5 mg/100g (F1 e 109,2 mg/100g (F2. Verificou-se que os produtos apresentaram estabilidade microbiológica e físico-química com contagens de probióticos ao final de 21 dias de armazenamento refrigerado de 2,5x109 UFC/g, pH 3,98 e 32% de extrato seco total (EST para F1 e 6,0x108 UFC/g, pH 4,16 e 31,5% EST para F2, ausência S. aureus e de coliformes. Conclui-se que o queijo Quark funcional apresentou altas contagens de bactérias láticas probióticas e presença de EPS, níveis estes importantes para a ação como alimentos funcionais e sobrevivência no trato gastrointestinal.

  8. Relacion de la resistencia a la insulina con la estructura, la funcion cardiaca y el metabolismo en adultos jovenes no obesos

    National Research Council Canada - National Science Library

    Gallo, Jaime; Aristizabal, Dagnovar; Segura, Angela; Correa, Monica; Zapata, Nora

    2008-01-01

    Introduccion: aunque en diabeticos tipo 2 y obesos la resistencia a la insulina se relaciona con alteraciones en la estructura, la funcion cardiaca, el metabolismo de los lipidos y la glucosa, no se sabe si...

  9. Contrapulsación externa aumentada, un tratamiento no invasivo recomendado para la angina refractaria, valoración de la clase funcional y la calidad de vida

    Directory of Open Access Journals (Sweden)

    Fernán Mendoza

    2017-05-01

    Conclusiones: La terapia de contrapulsación externa aumentada, mejora la calidad de vida y la clase funcional de angina y disnea en pacientes con angina refractaria y se convierte en un procedimiento no invasivo seguro y eficaz.

  10. Funciones de la supervición escolar en Venezuela. Aproximación a un modelo

    Directory of Open Access Journals (Sweden)

    Amada Mogollón de González

    2006-01-01

    Full Text Available Esta investigación tiene como propósito presentar la aproximación a un Modelo para las funciones de la supervisión escolar en Venezuela sustentado en los ámbitos, acción supervisora y funciones denominadas: Técnicas, Administrativas, Sociales, de Asistencia y Mediación. El modelo se fundamentó teóricamente en Kaufman, Stufflebeam, Teoría de Sistemas de Bertalanffy, enfoque humanista y jerarquía de las necesidades de Maslow. Es una investigación de campo realizada en Venezuela en los estados: Nueva Esparta, Distrito Federal, Carabobo, Lara, Táchira, Barinas y Delta Amacuro. El instrumento arrojó resultados que evidenciaron deficiencias, omisiones y ausencias durante el hecho supervisorio y su validación condujo a garantizar el éxito y calidad en la supervisión educativa venezolana.

  11. Funciones volumen-demora BPR y cónica en vías multicarriles de Bogotá

    Directory of Open Access Journals (Sweden)

    Luis Márquez

    2015-03-01

    Full Text Available En el marco del enfoque clásico de modelación del transporte, la fase de asignación de tráfico es la encargada de estimar el patrón de flujos y a partir de este, mediante cálculos posteriores, son estimadas todas las medidas de desempeño del sistema, tales como el nivel de servicio y las externalidades. Este trabajo compara los parámetros estimados de funciones volumen-demora BPR y cónicas con datos tomados en seis vías multicarriles de Bogotá, encontrando rangos de valores recomendables y concluyendo que los valores tradicionalmente empleados para este tipo de funciones no son los mejores para explicar la congestión del entorno estudiado.

  12. Una aproximación a la programación lógica con funciones indeterministas

    OpenAIRE

    Sarmiento Escalona, Antonio

    2011-01-01

    [Resumen] LA MEMORIA ES UN INTENTO DE INTEGRACION DE PROGRAMACION LOGICA Y FUNCIONAL DERIVADO DEL LENGUAJE DE PROGRAMACION BABEL, UTILIZA DOMINIOS DE SCOTT PARA LA SEMANTICA DECLARATIVA DEL LENGUAJE Y CONSTRUYE EL MODELO DE HERBRAND MINIMO, PARA PROBAR LA COMPLETUD DEL LENGUAJE, UTILIZANDO LA SEMANTICA DEL PUNTO FIJO. LA SEMANTICA OPERATIVA DEL LENGUAJE SE DA EN TERMINOS DE ESTRECHAMIENTO EN GRAFOS ACICLICOS, Y PRUEBA QUE ES COHERENTE Y COMPLETA RESPECTO A LA SEMANTICA DECLARA...

  13. Estudio de las funciones trigonométricas con Cabri: una estrategia para su enseñanza

    OpenAIRE

    Betín, Erika; Gonzales, Ivan; Oviedo, Elver

    2004-01-01

    A través del taller se muestra la posibilidad del uso del programa computacional Cabri para el desarrollo del pensamiento variacional especialmente; mostrando el comportamiento general de cada una de las funciones trigonométricas en el plano cartesiano, graficándolas en el mismo plano haciendo una simulación de eje “y” sobre el mismo sistema coordenado.

  14. INDEPENDÊNCIA FUNCIONAL E TOLERÂNCIA AO EXERCÍCIO FÍSICO EM PORTADORES DE DPOC

    Directory of Open Access Journals (Sweden)

    Natacha Angélica da Fonseca Miranda

    2015-08-01

    Full Text Available A Doença Pulmonar Obstrutiva Crônica (DPOC é caracterizada por uma limitação progressiva ao fluxo aéreo, de origem inflamatória e com repercussões multissistêmicas que se traduz dispneia, intolerância ao exercício e baixa capacidade funcional. Este estudo em andamento objetivou quantificar a independência funcional e a tolerância ao exercício físico em portadores de DPOC ingressantes no Programa de Reabilitação Pulmonar (PRP do Hospital Santa Cruz. De delineamento transversal, do tipo estudo de casos, avaliou a independência funcional através do questionário de Medida de Independência Funcional (MIF e a tolerância ao exercício através do teste máximo de carga incremental (Shuttle Test. Foram avaliados 14 portadores de DPOC, com idade média de 66,93 ± 6,22 e predominância do sexo masculino. Uma média de 122,21 ± 6,60 pontos no MIF foi encontrada, caracterizando-os como independência completa ou modificada. A distância média percorrida no Shuttle Test foi de 370,11 ± 114,53 metros, e observou-se sendo que quanto mais grave a DPOC menor foi à distância percorrida pelos sujeitos. Os portadores de DPOC deste estudo são independentes funcionalmente, porém apresentam diferentes níveis de tolerância ao exercício físico incremental e este parece estar associado com a progressão da doença.

  15. A prevalência de incapacidade funcional em idosos no Brasil Disability prevalence among the elderly in Brazil

    Directory of Open Access Journals (Sweden)

    Maria Isabel Parahyba

    2006-12-01

    Full Text Available O processo de envelhecimento brasileiro tende a se intensificar nas próximas décadas, de tal forma que, em 2050, projeta-se um número absoluto de idosos em torno de 64 milhões. Considerando que os estudos internacionais vêm apontando redução do declínio funcional entre os idosos nos países desenvolvidos, este estudo tem por finalidade analisar como vêm ocorrendo as mudanças na incapacidade funcional dos idosos, no Brasil, segundo alguns indicadores sociodemográficos selecionados. Foram utilizadas as informações dos Suplementos de Saúde da Pesquisa Nacional por Amostra de Domicílios (PNAD, de 1998 e 2003, realizados pelo Instituto Brasileiro de Geografia e Estatística (IBGE. Os microdados, para o cálculo das taxas de prevalência de incapacidade funcional, foram processados usando o Banco Multidimensional Estatístico (BME/IBGE. Os resultados apontam que houve redução nas taxas de prevalência de incapacidade funcional dos idosos, embora diferenciada entre os grupos sociodemográficos.International studies point to a decrease in the prevalence rate of disability in the elderly in developed countries. Brazil is undergoing an accelerated aging process likely to intensify in the course of the next decades. Thus, this study aims to analyze the changes occurring in the Brazilian disability profile for the population aged 60 years or more on national and regional level using the data of the 1998 and 2003 National Household Sample Survey (PNAD. The results show a general but socio-demographically differentiated reduction in the prevalence of disability during the period under study.

  16. El cuerpo en disputa: cuestionamientos a la identidad de género desde la diversidad funcional

    OpenAIRE

    García-Santesmases, A.

    2016-01-01

    Esta investigación busca analizar cómo la adquisición de una diversidad funcional física cuestiona o modifica la identidad de género del sujeto. Específicamente, se busca indagar tres áreas relativas a la construcción de la identidad de género: los imaginarios de feminidad y masculinidad, las relaciones y prácticas afectivo-sexuales, y el autoconcepto corporal.

  17. Las acciones jurisdicccionales ante la responsabilidad del estado y servidores públicos en el ejercicio de sus funciones

    OpenAIRE

    Moreira de la Paz, Cesar Humberto; Mosquera Pazmiño, Héctor Arcelio

    2013-01-01

    El Profesor y publicista Argentino Bielsa sostiene que el Acto Administrativo “es la decisión general o especial de una autoridad Administrativa en ejercicio de sus propias funciones, sobre los Deberes e intereses de las entidades administrativas o particulares respecto de ellas”. No cabe duda que el Acto Administrativo constituye uno de los elementos de manifestación de la voluntad del Estado que puede revestir contenido general o particular. Pensamos que para apreciar e...

  18. El deficiente proceso de especialización funcional en la formación de los oficiales de la PNP : problemas y posibles soluciones

    OpenAIRE

    Palacios Caycho, José Miguel

    2016-01-01

    El objetivo principal de esta investigación consiste en indagar sobre el proceso de implementación de la especialización funcional de los cadetes de la Escuela de Oficiales de la Policía Nacional del Perú y hallar dichas limitaciones que impiden que se concreten, de manera óptima, los procesos educativos de la especialización funcional. Tesis

  19. Relaciones entre variables sociodemográficas, incapacidad funcional, dolor y desesperanza aprendida en pacientes con diagnóstico de artritis reumatoide

    OpenAIRE

    Stefano Vinaccia; José Cadena; Fernando Juárez; Francoise Contreras; Juan Manuel Anaya

    2004-01-01

    El objetivo de este estudio descriptivo transversal fue estudiar las relaciones entre variables sociodemográficas, incapacidad funcional, dolor y desesperanza aprendida en pacientes con artritis reumatoide. Se utilizó una muestra de 124 pacientes (110 mujeres y 14 hombres) diagnosticados con artritis reumatoide según los criterios del American College of Rheumatology. Como instrumento de medida de la discapacidad funcional se utilizó el Activities of Daily Living (HAQ-ADL), par...

  20. Nuevos tiempos para la documentación informativa en el periodismo digital: viejas y nuevas funciones del servicio de documentación digital

    OpenAIRE

    Rubio-Lacoba, María

    2005-01-01

    Este artículo atiende a la adaptación del servicio de documentación informativa que pertenece a un medio digital. Para ello, parte en primer lugar de la definición de servicio de documentación informativa digital, muestra sus procesos fundamentales de trabajo y, finalmente, expone las funciones tradicionales que se reactualizan y las nuevas funciones que surgen para adaptarse a las nuevas necesidades de los periodistas digitales y del periodismo digital.

  1. Aproveitamento da casca de citros na perspectiva de alimentos: prospecção da atividade antibacteriana Utilization of citrus by-products in food perspective: screening of antibacterial activity

    Directory of Open Access Journals (Sweden)

    Carin Gerhardt

    2012-05-01

    Full Text Available Os citros são as frutas mais produzidas e consumidas no mundo. O Brasil ocupa primeiro lugar na produção mundial e na exportação de suco de laranja, sendo o Estado do Rio Grande do Sul um importante produtor. Ao longo do cultivo e do processamento dos citros, são geradas toneladas de resíduos de baixo valor comercial, mas com grande potencial de aproveitamento dentro da indústria de alimentos. Esses resíduos possuem elevados teores de nutrientes, pigmentos e componentes bioativos, bem como possuem baixa toxicidade e baixo custo. Há evidências de que a casca de diferentes espécies de citros possui princípios ativos antibacterianos e antifúngicos. O objetivo deste trabalho, portanto, foi verificar a atividade antibacteriana de extratos alcoólicos da casca de citros na perspectiva da desinfecção e da conservação de alimentos, propondo alternativas sustentáveis e naturais voltadas a consumidores cada vez mais preocupados com sua saúde. Foram obtidos extratos alcoólicos da casca crua de bergamota-ponkan (Citrus reticulata Blanco, pomelo (Citrus maxima (Burm. Merr. e limão-bergamota (Citrus limonia Osbeck ou limão-cravo maduros, provenientes de cultivo agroecológico, cujas atividades antibacterianas foram avaliadas quanto à Concentração Inibitória Mínima (CIM e à Concentração Bactericida Mínima (CBM frente a cinco diferentes bactérias. O extrato de limão-bergamota apresentou a melhor atividade antibacteriana, apresentando CIM em torno de 24 mg.mL-1 e CBM de 42 mg.mL-1 para as bactérias mais resistentes. A bactéria mais sensível a todos os extratos foi Pseudomonas aeruginosa, com CIM entre 16 e 36 mg.mL-1 e CBM entre 28 e 49 mg.mL-1. Os extratos inibiram ou inativaram na sua totalidade as bactérias testadas, indicando a possibilidade de se tornarem alternativas naturais na desinfecção e na conservação de alimentos.Citrus are the most produced fruits in the world. Brazil ranks first in global production and

  2. Correlatos anatômico-funcionais das emoções mapeados com técnicas de neuroimagem funcional

    Directory of Open Access Journals (Sweden)

    Geraldo Busatto

    2006-01-01

    Full Text Available Nos dias de hoje, o uso de técnicas de neuroimagem funcional permite investigações detalhadas dos circuitos cerebrais engajados durante o desempenho de paradigmas de estimulação que envolvem diferentes aspectos do processamento emocional em seres humanos saudáveis. Este artigo discute os princípios básicos dos métodos mais comumente usados em estudos de neuroimagem funcional das emoções, faz uma revisão seletiva de achados recentes obtidos nestes estudos, fornece exemplos de novos paradigmas usados atualmente neste tipo de investigação, e descreve modelos neuroanatômicos recentes para o processamento emocional formulados a partir dos achados da literatura contemporânea de neuroimagem. Por fim, enfatizamos o potencial das técnicas de neuroimagem funcional para ampliar o conhecimento a respeito da ação modulatória dos medicamentos usados para tratar condições mentais que alteram processos emocionais específicos, tais como a depressão e os transtornos de ansiedade.

  3. ANÁLISIS DE LAS FUNCIONES DEL PROFESORADO UNIVERSITARIO Y SUS LIMITACIONES PARA REALIZAR INVESTIGACIÓN

    Directory of Open Access Journals (Sweden)

    Marco Antonio Zamora Antuñano

    2009-01-01

    Full Text Available El trabajo que se presenta indaga las funciones del profesorado universitario, así como las causas y limitaciones para realizar investigación en la Universidad Tecnológica de San Juan del Río, Querétaro, México. El profesorado universitario debe atender a tres funciones representativas de esta profesión: la docencia y tutoría, la investigación y la gestión. Se empleó una metodología descriptiva, mediante la utilización de un cuestionario denominado (ISPPTC como técnica de recogida de información. Con base en el análisis de datos, los principales resultados desde el punto de vista de los docentes fueron: (1 la falta de definición de una política institucional de investigación, (2 la falta de incentivos y (3 el equilibrio entre la labor docente de enseñanza y las funciones de gestión administrativa. Para el Subsistema Nacional de Universidades Tecnológicas en México, el acceso a ciertos beneficios para los docentes se estableció a partir del año 2007 con el Programa de Mejoramiento del Profesorado (PROMEP, sin embargo, una de las condiciones adversas de los profesores para contar con estos beneficios es su dificultad para hacer investigación.

  4. Funciones de las herramientas multimedia interactivas para la enseñanza en educación preescolar

    Directory of Open Access Journals (Sweden)

    Matilde Bolaño García

    2017-04-01

    Full Text Available El desarrollo de los sistemas informáticos de la última década, ha consolidado la notoriedad de herramientas multimedia que tienen como propiedad la interactividad, lo cual las ha afianzado como apoyo didáctico. Desde esta perspectiva, se propuso determinarlas funciones de las Herramientas Multimedia Interactivas (HMI usadas por los docentes para la enseñanza en educación preescolar de las instituciones educativas pertenecientes a la comuna 6 de Santa Marta–Colombia. Metodológicamente, se orientó en un enfoque positivista, con tipo de investigación descriptiva y diseño de campo, no experimental. En cuanto a la población objeto de estudio, estuvo constituida por 38 docentes de preescolar de las instituciones educativas pertenecientes a la comuna. Como técnica de recolección de datos se empleó la observación por encuesta y el instrumento fue el cuestionario. Luego de analizar los datos se encontró que son tres funciones de las HMI asociadas a la enseñanza en educación preescolar, concluyendo que los docentes se ubicaron en la categoría de poco usada o promovida en las funciones Exploratoria y experimentación, además de la instructiva o entrenadora, mientras que la función motivadora es medianamente usada o promovida por los docentes.

  5. Funciones ejecutivas en niños escolarizados: efectos de la edad y del estrato socioeconómico

    Directory of Open Access Journals (Sweden)

    Vanessa Arán Filippetti

    2011-01-01

    Full Text Available En los últimos años, se ha incrementado notoriamenteel estudio sobre las funciones ejecutivasprefrontales en niños de edad escolar. El objetivodel presente estudio es analizar la influencia dela edad y del estrato socioeconómico (ESE en eldesempeño de tareas ejecutivas y conocer cuálesson las variables socioeconómicas que predicenuna mejor ejecución. Participaron 254 niños de 7a 12 años de edad de diferentes estratos socioeconómicosde la ciudad de Santa Fe, Argentina. Seutilizó una batería de pruebas ejecutivas sensiblesa la función prefrontal. Los resultados obtenidosseñalan un efecto significativo de la edad y delESE sobre las funciones ejecutivas estudiadas.Los diferentes dominios del constructo siguen unatrayectoria diferente según el desarrollo y el efectodel ESE. Además, en todas las funciones ejecutivasse evidencia un patrón de funcionamiento cognitivoinferior en los niños de estrato socioeconómico bajo(ESB. Finalmente, se encontró que, de las variablesincluidas en el análisis, solo el nivel educativode la madre y las condiciones de alojamiento de lafamilia se asocian al funcionamiento ejecutivo delos niños. Se discuten los resultados en funciónde la influencia que ejerce la maduración cerebraly las variables ambientales en el funcionamientoejecutivo.

  6. Revisión bibliográfica sobre funciones objetivo para el apilamiento de contenedores

    Directory of Open Access Journals (Sweden)

    Laidy De Armas Jacomino

    2017-05-01

    Full Text Available Una terminal de contenedores es una fuente de disímiles problemas de índole matemática y por ende computacional. En particular el apilamiento de contenedores en el patio de una terminal marítima es una de las operaciones más importantes, debido fundamentalmente, a los cuellos de botella que en él surgen, con los respectivos incumplimientos de los indicadores de eficiencia. El apilamiento de contenedores se divide en actividades de carga, descarga y recolocación o premarshalling de contenedores. Cuando se realizan estas actividades los operarios y directivos deben determinar las posiciones exactas para los contenedores, descargarlos o recolocarlos haciendo un uso eficiente del espacio de almacenamiento disponible, reduciendo los movimientos improductivos y los costos de transportación, etc. El propósito del presente trabajo es revisar y describir funciones objetivo encontradas en la literatura sobre problemas de optimización que surgen durante el apilamiento de contenedores. Las funciones objetivo analizadas están agrupadas en dos clases fundamentales: minimizar movimientos improductivos de las grúas de patio y minimizar costo de transportación de los contenedores durante el apilamiento. Según el conocimiento de los autores no se encuentra disponible en la literatura revisada una clasificación atendiendo a la modelación matemática de las funciones objetivo similar a la propuesta.

  7. Educación inclusiva y diversidad funcional en la Universidad

    Directory of Open Access Journals (Sweden)

    Ernesto Martín-Padilla

    2013-04-01

    Full Text Available Este artículo tiene como fin describir los elementos básicos requeridos para facilitar una educación inclusiva en la superior para las personas con necesidades educativas especiales, desde la perspectiva de la diversidad funcional. A lo largo de esta revisión se identifican los cambios que ha tenido el concepto de discapacidad. Este escrito pone de manifiesto una serie de conclusiones que permiten la formación de modelos prácticos que aborden las distintas dimensiones que sustentan un proceso de inclusión social en el ámbito universitario. En tal sentido, en orden de implementar estos cambios, debe promoverse un mayor esfuerzo colaborativo entre los distintos sectores involucrados. Se reconocen también las barreras y dificultades que deben ser primero superadas para poder implementar estos modelos inclusivos propuestos en los artículos consultados. El contar con apoyos para las personas con necesidades especiales permitiría un proceso de inclusión donde se mantengan los niveles de exigencia para la preparación de profesionales competentes e idóneos.

  8. Educación inclusiva y diversidad funcional en la Universidad

    Directory of Open Access Journals (Sweden)

    Ernesto Martín Padilla

    2013-04-01

    Full Text Available Este artículo tiene como fin describir los elementos básicosrequeridos para facilitar una educación inclusiva en la superiorpara las personas con necesidades educativas especiales, desdela perspectiva de la diversidad funcional. A lo largo de estarevisión se identifican los cambios que ha tenido el conceptode discapacidad. Este escrito pone de manifiesto una serie deconclusiones que permiten la formación de modelos prácticosque aborden las distintas dimensiones que sustentan un procesode inclusión social en el ámbito universitario. En tal sentido,en orden de implementar estos cambios, debe promoverseun mayor esfuerzo colaborativo entre los distintos sectoresinvolucrados. Se reconocen también las barreras y dificultadesque deben ser primero superadas para poder implementar estosmodelos inclusivos propuestos en los artículos consultados.El contar con apoyos para las personas con necesidades especialespermitiría un proceso de inclusión donde se mantenganlos niveles de exigencia para la preparación de profesionalescompetentes e idóneos

  9. Instituições Financeiras sob uma Análise Funcional Istituzioni

    Directory of Open Access Journals (Sweden)

    Eduardo Francisco de Souza

    2015-12-01

    Full Text Available O presente trabalha se vale da obra de Norberto Bobbio na tentativa de proceder a uma análise funcional do sistema financeiro e das instituições financeiras. A perspectiva funcionalista orienta uma crítica ao papel que as instituições financeiras assumiram num contexto de crise econômica cujas origens estão, segundo autores, na forte desregulação financeira e no seu descasamento do setor produtivo. No cenário nacional, a perspectiva funcionalista apresentada possibilita uma crítica ao manejo disfuncional das instituições públicas de fomento (sobretudo, o BNDES, propiciadas pelo sigilo bancário, bem como se cogita de uma função negativa de tais instituições, derivada da solução proposta para essa mencionada disfuncionalidade   afastamento irrestrito do sigilo bancário em operações conduzidas por bancos públicos de fomento.

  10. Razonamiento covariacional en el estudio de funciones cuadráticas

    Directory of Open Access Journals (Sweden)

    Jhony Alexander Villa-Ochoa

    2012-10-01

    Full Text Available En este artículo se usa el marco conceptual de Carlson et al. (2003 para discutir los resultados de un estudio de caso, el cual describe la forma como un estudiante razona covariacionalmente al enfrentarse a situaciones de variación asociadas a funciones cuadráticas. El estudio se ideó para desarrollar una línea convergente de indagación (Yin, 2009, la cual se centró en las descripciones que el estudiante realizaba a medida que abordaba las situaciones diseñadas para el estudio; dichas descripciones fueron trianguladas con las producciones escritas y los elementos teóricos. Desde las acciones que el estudiante evidenció, se pudo observar que el proceso de razonamiento covariacional no es un proceso lineal pero sí recursivo. Así mismo, este estudio de caso pone en evidencia el hecho de que existen estudiantes que pueden aproximarse a una interpretación variacional de las concavidades de una gráfica, sin que ello exija un estudio previo del cálculo diferencial. Del estudio se desprenden algunas implicaciones tanto para el marco conceptual abordado en este estudio como para el diseño de situaciones orientadas al aula de clase.

  11. CARACTERÍSTICAS ANÁTOMO-FUNCIONAL DEL APARATO RESPIRATORIO DURANTE LA INFANCIA

    Directory of Open Access Journals (Sweden)

    Dr. Carlos A. Asenjo

    2017-01-01

    Full Text Available El sistema o aparato respiratorio, presenta diferencias significativas con el adulto, derivadas principalmente de su inmadurez anatómica y fisiológica. Esto le confiere gran labilidad funcional, tanto mayor cuanto menor es su edad. Como compensación, presenta abundancia e intensidad de síntomas en la falla respiratoria, que hace que las enfermedades respiratorias no pasen inadvertidas y merezcan especial atención, en forma precoz. Como excepción a la regla, los recién nacidos expresan pobremente el compromiso respiratorio. Sin embargo, la aparición de signos como apnea y bradicardia en presencia de hipoxemia, hecho inhabitual en el niño mayor, nos indican que la característica anterior no es permanente ni homogénea, otorgándole una condición única no concordante con la fisiología del organismo adulto. El conocimiento sobre las características anatómicas y funcionales de la vía aérea extra e intratorácica, nos va a permitir identificar precozmente las características fisiopatológicas que nos permitan sospechar una enfermedad en todo paciente pediátrico.

  12. GUÍA DE ENTREVISTA PARA EL ANÁLISIS FUNCIONAL DE CONDUCTAS EN PERSONAS TRANSEXUALES

    Directory of Open Access Journals (Sweden)

    José Miguel Rodríguez Molina

    2013-05-01

    Full Text Available La transexualidad es un fenómeno emergente. Por ello hay pocos instrumentos de evaluación psicológica. El objetivo de este artículo es mostrar a la comunidad de profesionales de la psicología clínica y de la intervención social un instrumento que puede facilitar esta tarea. Se realiza una breve introducción al fenómeno de la transexualidad y la evaluación psicológica en este campo, que casi siempre se centra en el diagnóstico o en otras variables generalmente de personalidad (rasgos de personalidad, depresión, ansiedad,…. Posteriormente se abordan los principales problemas que encuentra una persona transexual durante su proceso. Estos problemas son fuente potencial o real de conflictos psicológicos. Más tarde se describe brevemente la evaluación conductual muy olvidada en esta área. Por último se propone un nuevo instrumento esta la evaluación. El principal resultado es la Guía de Entrevista para el Análisis Funcional de Secuencias Conductuales (AFUSCO. Se concluye con la necesidad de más evaluación conductual en este campo.

  13. Impacto da visita domiciliar na capacidade funcional de pacientes com úlceras venosas

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    Fabiana Lopes Joaquim

    2016-06-01

    Full Text Available RESUMO Objetivo: avaliar o impacto da visita domiciliar protocolar na capacidade funcional de pacientes adultos e idosos com úlceras venosas antes e após as orientações recebidas em domicílio. Método: estudo clínico experimental, randomizado não cego e controlado, desenvolvido com 32 pacientes (grupos caso e controle. Os campos de investigação foram o Ambulatório de Reparo de Feridas do Hospital Universitário Antônio Pedro e os domicílios de pacientes atendidos no referido ambulatório. A coleta ocorreu de fevereiro a junho de 2014, por meio de instrumento de avaliação da unidade de saúde, do índice de TINETTI e de roteiro de orientações a serem prestadas aos sujeitos da pesquisa que receberam visita domiciliar. Resultados: os participantes do grupo caso apresentaram melhora significativa e diferenciada pós-intervenção quando comparados aos do grupo controle, que se mantiveram estáveis. Conclusão: as orientações no contexto domiciliar foram benéficas aos integrantes do grupo caso.

  14. Las funciones ejecutivas en la clínica neuropsicológica infantil

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    Vanessa Arán Filippetti

    2013-01-01

    Full Text Available En los últimos años, el estudio de las funciones ejecutivas (FE aso- ciado a diferentes trastornos del neurodesarrollo ha experimentado un notable auge en el ámbito de la neuropsicología infantil. En el presente artículo revisamos los principales modelos teóricos del funcionamiento ejecutivo en niños atendiendo a sus implicancias tanto para la valoración clínica como para la praxis educativa. En relación con sus bases neuroanatómicas se destacan los modelos neu- rofuncionales que ponen el acento en la fluida relación entre la corteza prefrontal (CPF y las FE así como en la riqueza de conexiones entre la CPF y diferentes regiones corticales y estructuras subcorticales. Finalmen- te, examinamos los perfiles de funcionamiento ejecutivo en diferentes trastornos de la clínica neuropsicológica infantil. La integración de estos aportes permite comprender la heterogeneidad del déficit ejecutivo en trastornos infantiles que no necesariamente cursan con patología primaria de los lóbulos frontales.

  15. Factótum un tutor virtual para el estudio de las funciones

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    Enrique Vílchez Quesada

    2013-03-01

    Full Text Available Se presenta el estado actual de un proyecto de investigación realizado con el principal propósito de dotar tanto a estudiantes como a docentes de Matemática, a nivel nacional, de un sistema multimedia capaz de apoyar el estudio del tema de las funciones en secundaria. El proyecto engloba todas las etapas necesarias para el desarrollo del tutor virtual y su correspondiente validación por parte de sus potenciales usuarios. Como una de las etapas anteriormente citadas, se aplicó un cuestionario de diagnóstico a tres grupos de enseñanza media provenientes de instituciones tanto públicas como privadas, ubicadas en distintos sectores sociales de Costa Rica (rural, urbano y urbano marginal y a diez profesores de educación secundaria, para determinar las necesidades cognitivas de los alumnos en este tema y los requerimientos del sistema que posteriormente se desarrolló y que se presenta como parte de este artículo.   

  16. Dependência funcional de idosos e a sobrecarga do cuidador

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    Aline Cristina Martins Gratão

    2013-02-01

    Full Text Available A finalidade deste estudo foi identificar a dependência funcional de idosos e a sobrecarga do cuidador. Trata-se de estudo epidemiológico e transversal realizado em 2009 com 574 idosos e 124 cuidadores em Ribeirão Preto-SP, por meio dos instrumentos MIF e Escala de Sobrecarga de Zarit. Entre os idosos, a maioria era do sexo feminino (67,8%, com média de 76,6 anos, baixa escolaridade (54,7% e renda individual mensal de R$ 942,20. Apenas 15,7% foram identificados como dependentes. Dos cuidadores, 85,6% era do sexo feminino, com média de 56,5 anos e 90,3% eram familiares (filhas ou esposas. A média de sobrecarga dos cuidadores foi de 27,8 (±17,5. A dependência do idoso foi fator de risco para sobrecarga do cuidador (p<0,05. A abordagem preventiva e a intervenção precoce devem ser prioritárias para essa população. São necessárias a vigilância de uma equipe multidisciplinar de saúde, a aplicação de instrumentos de avaliação do comprometimento da funcionalidade e a intervenção para prevenção da sobrecarga dos cuidadores.

  17. Graduación mediante funciones Gompertz-Makeham dinámicas.

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    Montes Suay, Francisco

    2004-01-01

    Full Text Available El objetivo de este trabajo es modelar la influencia del tiempo de calendario y la edad, en las probabilidades de muerte, qx. Para ello, se gradúa los datos de mortalidad de la Comunidad Valenciana correspondientes a los años 1980 a 1999. En primer lugar obtenemos el ajuste de las funciones Gompertz-Makeham con términos correspondientes a las variables edad y tiempo mediante modelos lineales generalizados. La elección del modelo que mejor se ajusta a los datos de cada periodo se lleva a cabo atendiendo a criterios de bondad de ajuste y de complejidad del mismo. Se trata de buscar un equilibrio entre ambos aspectos, para lo cual utilizamos medidas y contrastes implementados en S-plus. Del modelo obtenido para cada sexo hacemos un análisis más detallado mediante los tests no paramétricos habituales y análisis gráfico, para concluir la adecuación de éstos a la experiencia de mortalidad.

  18. Aspectos conceituais e fatores associados ao Letramento Funcional em Saúde: revisão de literatura

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    Poliana Cristina Rocha

    2016-02-01

    Full Text Available RESUMO O objetivo deste estudo é revisar as produções científicas acerca da avaliação do letramento funcional em saúde em associação com a qualidade de vida; e analisar metodologicamente os estudos observacionais sobre a temática. Trata-se de revisão integrativa de literatura produzida com base em artigos relacionados aos seguintes eixos temáticos: letramento funcional em saúde e qualidade de vida, com busca realizada nas bases de dados PubMed, Lilacs, Biblioteca Virtual em Saúde. Após a aplicação dos critérios de inclusão obteve-se 538 artigos e após a aplicação dos critérios de exclusão foram selecionados 11 artigos sendo nove estudos internacionais e dois nacionais. A revisão constou de compilação e construção de linha histórica das publicações, análise metodológica dos estudos observacionais e elaboração de nuvem de textos. A maior parte dos artigos tem análise quantitativa; público alvo adultos e idosos e medem o nível de letramento funcional em saúde. Os estudos verificaram relação positiva do letramento funcional em saúde com a baixa escolaridade, idade mais avançada, sexo masculino e baixa renda. Os principais cenários foram ambientes assistenciais. O letramento funcional em saúde apresentou associação com variáveis sócio-demográficas como sexo, idade e escolaridade. A maior parte dos estudos encontrados na busca teve como objetivo relacionar o letramento a patologias e foi realizado em ambientes clínicos (ambulatórios e hospitais. Dos oito artigos observacionais incluídos na presente revisão atenderam totalmente aos critérios metodológicos para elaboração desse tipo de estudo.

  19. Incapacidade funcional para atividades básicas e instrumentais da vida diária em idosos

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    Giovâni Firpo Del Duca

    Full Text Available OBJETIVO: Estimar a prevalência e os fatores associados à incapacidade funcional para atividades básicas e instrumentais da vida diária em idosos. MÉTODOS: Estudo transversal com 598 indivíduos com idade igual ou superior a 60 anos, selecionados em amostragem por conglomerado em dois estágios na cidade de Pelotas, RS, entre 2007 e 2008. Para a avaliação das atividades básicas e instrumentais foram empregados o Índice de Katz e a Escala de Lawton, respectivamente. Definiu-se como incapacidade funcional para cada domínio a necessidade de ajuda parcial ou total para a realização de, no mínimo, uma atividade da vida diária. Empregou-se a regressão de Poisson com variância robusta nas análises bruta e ajustada levando-se em consideração a amostragem por conglomerados. RESULTADOS: A prevalência de incapacidade para as atividades básicas foi de 26,8% (IC 95%: 23,0; 30,8 e a menor proporção de independência foi para controlar funções de urinar e/ou evacuar. Para as atividades instrumentais, a prevalência de incapacidade funcional foi de 28,8% (IC 95%: 24,5; 33,1, sobretudo para realizar deslocamentos utilizando algum meio de transporte. Elevado percentual de idosos (21,7% apresentou mais de uma atividade com incapacidade nas atividades instrumentais; já nas atividades básicas, a maior parte apresentou dependência para apenas uma atividade (16,6%. Na análise ajustada, a incapacidade para as atividades básicas associou-se com cor da pele parda/preta/outras (p=0,01 e com o aumento da idade (p<0,001. Já a incapacidade para as atividades instrumentais associou-se apenas com o aumento da idade (p<0,001. CONCLUSÕES: A associação entre incapacidade funcional em atividades básicas e instrumentais com o aumento da idade é um importante indicador para que os serviços de saúde planejem ações visando prevenir ou postergar a incapacidade funcional, garantindo independência e maior qualidade de vida ao idoso.

  20. Nuevo enfoque sobre la gestión del mantenimiento en subestaciones eléctricas; New Focus about the Maintenance Management in Electrical Substations

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    Israel Gondres Torné

    2011-02-01

    Full Text Available En el trabajo se presenta un nuevo enfoque de la gestión del mantenimiento en las subestaciones eléctricasque interconectan al sistema electroenergético nacional con la generación distribuida, tratando de adaptardicho mantenimiento a las necesidades cada día más crecientes del país enmarcado en la RevoluciónEnergética. Los temas que abordan el mantenimiento son muy extensos y se necesitarían varios tratadostécnicos para enfrentarlos de una manera completa, por ello solo se hace énfasis en algunos puntos devista de dos de las tendencias actuales acordes con la experiencia y estudios del tema, citando losresultados obtenidos a partir de trabajos anteriores y otros en ejecución, lo cual corrobora la importanciaque reviste actualmente la utilización eficiente de las técnicas de avanzada aparejadas a las nuevasfilosofías del mantenimiento mundial.  In this paper a new focus is exposed about the maintenance management in the electrical substations thatinterconnects the system with the distributed generation, trying to adapt this maintenance to the needs ofevery most growing day in the country framed in the Energy Revolution. The approached topics about themaintenance are very extensive and several topics would be needed to face them in a complete way, forthis alone emphasis, is made in some point of views from two of the actual tendencies according to theexperience and theme studies, mentioning the results obtained starting from previous projects and othersin execution, that which corroborates the importance that the efficient use of the new techniques harnessedhas to the new philosophies of the world maintenance.

  1. Autonomia funcional de idosas praticantes de Pilates Functional autonomy of elderly women practicing Pilates

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    Brena Guedes de Siqueira Rodrigues

    2010-12-01

    Full Text Available O objetivo foi avaliar o efeito do método Pilates na autonomia funcional de idosas. Foram selecionadas 52 voluntárias, submetidas à avaliação geral e ao protocolo de avaliação da autonomia funcional do Grupo Latino-Americano de Desenvolvimento para Maturidade (GDLAM, que consiste em cinco testes (caminhada de 10 m, levantar-se da posição sentada, levantar-se da cadeira e locomover-se pela casa, levantar-se da posição de decúbito ventral e vestire tirar uma camiseta; em seguida, foram divididas em dois grupos: grupo Pilates (GP, n=27; idade 66,9±5,3 anos e grupo controle (GC, n=25; idade 65,2±3,9 anos. O GP foi submetido a uma série de dez exercícios de Pilates, por oito semanas, duas vezes por semana. Os dois grupos foram reavaliados após esse período. O nível de significância considerado foi de p?0,05. O GP obteve resultados significativamente melhores em todos os testes e no índice geral do GDLAM (p=0,035 após a intervenção. O GC obteve escore significativamente melhor (p=0,042 apenas no teste de caminhada de 10 m, tendo mantido sua classificação inicial de funcionalidade regular. Comparando-se os escores dos grupos após a intervenção, encontraram-se diferenças significativas em favor do GP, inclusive no índice GDLAM (pThe purpose of the study was to assess the effect of the Pilates method on elderly women's functional autonomy. Fifty-two volunteers were submitted to the evaluation protocol of the Latin-American Group for Maturity Development (GDLAM, which consists of five tests: a 10-meter walk, get up from the sitting and lying down positions, get up and walk around at home, and to put on and take off a t-shirt. They were then divided into Pilates group (PG, n=27, mean age 66.9±5.3 years and control group (CG, n=25, mean age 65.2±3.9 years old. PG underwent a series of 10 Pilates exercises twice-weekly for eight weeks, both groups being reassessed thereafter. The level of significance was set at p?0

  2. Validación de la Escala de Independencia Funcional Validation of the Functional Independence Scale

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    Pablo Martínez-Martín

    2009-02-01

    Full Text Available Objetivo: Evaluar la calidad psicométrica de un instrumento diseñado para medir la independencia funcional (Escala de Independencia Funcional, EIF en varios dominios de actividades de la vida diaria y ser aplicado por entrevistadores entrenados no expertos en el ámbito sanitario. El estudio se realizó en población mayor no institucionalizada residente en la Comunidad de Madrid. Métodos: Estudio transversal de validación. Se aplicaron la EIF, el test de Pfeiffer, la subescala de depresión de la Hospital Anxiety and Depression Scale, un indicador de comorbilidad, el Índice de Barthel y el EQ-5D, a población residente en medio comunitario (n=500 y a pacientes ambulatorios en medio hospitalario (n=100 de edad ≥65 años. Se analizaron los siguientes atributos psicométricos de la EIF: aceptabilidad, asunciones escalares, consistencia interna, validez de constructo y precisión. Resultados: La escala resultó totalmente computable en el 94,3% de los sujetos, con efecto techo (60,65% y sin efecto suelo (0,22% en el medio comunitario. En el medio hospitalario no se evidenció efecto suelo ni techo. La escala mostró asunciones escalares satisfactorias y elevada consistencia interna (correlaciones ítem-total: 0,57-0,91; alfa de Cronbach: 0,94, así como una estructura multidimensional (tres factores; 74,3% de la varianza. Los índices de validez convergente, interna y para grupos conocidos, al igual que la precisión (error estándar de la medida: 2,49; intervalo de confianza del 95%: 4,88 resultaron satisfactorios. Conclusiones: En suma, la EIF es una escala de uso sencillo con atributos métricos apropiados, y su aplicación por parte de personal no sanitario resulta útil para muestras amplias de individuos mayores no institucionalizados.Objective: To assess the psychometric quality of an instrument designed to measure functional independence (Functional Independence Scale [FIS] in several activities of daily living domains and to be

  3. DINÁMICA FAMILIAR, ENVEJECIMIENTO Y DETERIORO FUNCIONAL EN MÉXICO 1

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    Verónica Montes de Oca

    2010-01-01

    Full Text Available 1.Documento preparado para la II Conferencia intergubernamental sobre envejecimiento, Brasilia, Brasil, 4-6 de diciembre del 2007. El presente documento se inscribe en la discusión sobre las transformaciones que han experimentado las familias en México en el siglo XX, y como se asoman algunas dinámicas al interior que son resultado del alargamiento en la esperanza de vida individual y de la presencia de limitaciones funcionales en los miembros en edad avanzada. Se reflexiona sobre los cambios sociales y demográficos en los hogares, las estrategias de apoyo y cuidado hacia las personas adultas mayores con presencia de enfermedades y limitaciones funcionales a partir de cálculos realizados con base en la Encuesta Nacional sobre Salud y Envejecimiento (2001. Si bien hay un esfuerzo de las instituciones de salud y de los arreglos familiares para atender esta situación, este artículo permite mostrar la fuerza y debilidad del sistema de protección social en la procuración de cuidados y apoyos hacia las personas en la vejez con limitaciones funcionales. Presenta algunos retos y áreas de acción relevantes para las instituciones gubernamentales y no gubernamentales. La idea que se propone, con base en este análisis, es reaccionar activamente entre instituciones, familias y sociedad para apoyar a la vejez que experimenta el deterioro progresivo de sus facultades físicas y mentales. Palabras-claves: dinámica familiar; vejez; deterioro funcional.

  4. Incapacidade funcional em mulheres idosas de baixa renda Functional incapacity among low-income elderly women

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    Jair Sindra Virtuoso Júnior

    2011-05-01

    Full Text Available O propósito deste estudo foi o de analisar a relação dos aspectos sociodemográficos e referentes às condições de saúde com a incapacidade funcional em mulheres idosas de baixa renda. O estudo teve delineamento transversal, com uma amostra representativa de 222 mulheres, com média de 70 anos (± 7,27, pertencentes a grupos de convivência no município de Jequié, Bahia. Foram realizadas medidas antropométricas e a aplicação de uma entrevista contemplando as variáveis: sociodemográficas, saúde física e comportamental. A análise estatística foi realizada com nível de significância pThe scope of this study was to analyze the relationship between socio-demographic and health-related aspects and functional incapacity among low-income elderly women. This cross-sectional study involved a representative sample of 222 women with mean age of 70 years (± 7.27, in community groups in the city of Jequié, in the State of Bahia, Brazil. Anthropometric measurements were taken and interviews staged to examine the socio-demographic, physical and behavioral health variables. The statistical analysis was accomplished with a level of significance of p<0.05, with calculation of the respective odds ratio in the binary logistic regression, for analysis of hierarchically-grouped factors. The prevalence of functional incapacity was 46.8% and, by using hierarchical multivariate analysis, a significant association was detected with increased age, insufficient schooling, hospitalization, lack of physical exercise throughout life and alterations in the cognitive function. The characteristics identified that associated limitations in instrumental activities in daily life suggest a complex causal network in the determination of functional incapacity in low-income elderly women.

  5. Cambios en la variabilidad temporal de la conectividad funcional electroencefalográfica durante el envejecimiento

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    Almudena González

    2017-04-01

    Full Text Available Analizamos las alteraciones durante el envejecimiento en la variabilidad temporal de la conectividad funcional (CF electroencefalográfica (EEG. La variabilidad en la CF se ha relacionado con el rendimiento cognitivo. El estudio se realizó en dos grupos de sujetos sanos: uno de 10 adultos entre 50-65 años y otro de 15 entre 66-85 años. Se realizaron registros EEG monopolares de 16 canales EEG en reposo: con ojos cerrados (OC y bajo hiperventilación (HV. La CF cortical entre pares de canales EEG se estimó a partir de un índice (L de sincronización no lineal generalizada. Para cada sujeto y condición, se calculó respectivamente, la conectividad global (CG de cada área/canal con el resto de las mismas y la variabilidad temporal de dicha conectividad (VTC a partir del promedio y desviación estándar de sucesivas medidas de CF. Los cambios con la edad/condición de CG y VTC de las áreas corticales se estimaron mediante MANOVA. Encontramos que la CG no cambia con la edad durante OC ni HV, pero la VTC del conjunto de áreas corticales es significativamente mayor (p<0.01 en los sujetos menores de 65 años y fundamentalmente para las áreas centrales, temporales y parietales (p<0.01. Concluimos que la disminución de la VTC con el envejecimiento podría estar relacionada con déficits en el rendimiento cognitivo.

  6. Cómo reescribir funciones aleatorias multivariadas como univariadas para hacer cokrigeage. Un algoritmo flexible

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    Adrian Martínez-Vargas

    2010-03-01

    Full Text Available La mayoría de los software para geoestadísticas poseen un limitado número de modelos de krigeage y no son lo suficientemente flexibles para definir nuevos o complicados modelos. Con el objetivo de obtener un algoritmo flexible de krigeage se empleó la notación de funciones aleatorias regionalizadas (RF multivariadas escritas como una RF univariada Z(x, i, con un drift m(x, i, j, donde i y j son identificadores de variables. Se programó en C++ una librería geoestadística llamada OpenKriging, con una función que se puede llamar desde código escrito en Python, la cual es capaz de construir el sistema de krigeage de la RF mencionada, sin restricciones en el número de dimensiones espaciales, variables y monomios en el drift. Se implementaron dos tipos de drift: los geográficos y los drift externos, estos pueden ser independientes o no. La función responsable de construir el sistema de ecuaciones krigeage no se programó para un modelo predefinido, el modelo es definido por el usuario pasando desde el código en Python los datos y argumentos apropiados y modificando el sistema antes de resolverlo. La librería resultante puede asimilar muchos de los modelos conocidos de krigeage y también modelos nuevos o poco comunes; esta es fácil de modificar para incrementar su funcionalidad, la cual se mostró a través de dos ejemplos de modelos de krigeage: uno con definición complicada y el otro poco común.

  7. Cirugía de la insuficiencia mitral isquémica funcional

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    José Manuel Revuelta

    2005-10-01

    Full Text Available La insuficiencia mitral isquémica funcional constituye una lesión valvular compleja que se presenta de diversas formas anatómicas dependiendo del tipo disfunción ventricular, la extensión del daño miocárdico, los cambios morfológicos del ventrículo izquierdo, así como del desplazamiento espacial experimentado por los diferentes elementos que componen la válvula mitral. En la actualidad se acepta que las regurgitaciones de grado moderado y grave deben corregirse quirúrgicamente, ya que en caso contrario el pronóstico no es satisfactorio. Se precisa modificar la clasificación clásica de Carpentier para que las diferentes formas de la insuficiencia mitral isquémica puedan englobarse en un mismo tipo (tipo IV: movilidad valvular variable. La reparación valvular debe conseguir una adecuada coaptación valvular, por lo que debe corregirse la regurgitación simétrica o asimétrica, individualizarse el tipo de anuloplastia y las técnicas reparadoras utilizadas. La anuloplastia restrictiva con anillo de pequeño tamaño (dos medidas menos asegura la competencia valvular al reducir de manera apropiada el anillo mitral, incluyendo la región intertrigonal cuando está dilatada. Recientemente, se están utilizando nuevos sistemas de reparación mitral (anuloplastia asimétrica, tracción intracavitaria con cuerdas artificiales que abren nuevas alternativas al tratamiento quirúrgico de esta interesante y no del todo bien conocida insuficiencia valvular.

  8. UNA ALTERNATIVA PARA DETECTAR OBSERVACIONES INFLUYENTES EN FUNCIONES DE PRODUCCIÓN UNIVARIADAS

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    L.F. RINCÓN

    1998-05-01

    Full Text Available En muchas aplicaciones agrícolas o biológicas, se ajustan modelos basados en funciones de producción Yi = (Xi, q + e para un conjunto de variables predictoras Xj j = 1,. . . , k y un vector parámetros q. En este trabajo se presenta una alternativa para detectar observaciones influyentes, cuando la función de producción es univariada y la estimación de los parámetros se realiza por el método de Gauss - Newton.Em muitas aplicações agrícolas ou bilógicas, ajustam-se modelos baseados em funções de produção Yi = (Xi, q + e, para um conjunto de variáveis preditoras xj , j=1,..., k e um vetor de parâmetros q. Neste estudo apresenta-se uma alternativa para detectar observações influentes, quando a função de produção é univariada e a estimação dos parâmetros é executada através do método de Gauss-Newton.Models of production functions Yi = (Xi , q + e, with explanatory variables xj , j=1,..., k and a parameter vector q are used in agricultural and biological areas. In the present work we present an alternative to detect influent observations, when the production function is univariate and the Gauss-Newton method is used to estimate the parameters.

  9. Avaliação funcional respiratória pré-operatória

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    Maria João Matos

    2005-08-01

    Full Text Available Resumo: A avaliação funcional pré-operatória tem evoluído muito ao longo dos anos. Vários parâmetros ventilatórios têm sido referenciados e é Markos, em 1993, que preconiza que o risco operatório deverá ser estabelecido com base na função que se prevê para o pós-operatório e não na função prévia ao acto cirúrgico. A acrescentar aos parâmetros clássicos (FEV1 e DLCO, a avaliação funcional regional por radioisótopos e a ergometria têm um papel importante na previsão de valores pós-operatórios e na estimativa do risco operatório estratificado.No que diz respeito aos limites de operabilidade, não existem consensos quanto a valores mínimos exigidos para cirurgia, embora tenham sido propostas orientações nesse sentido. Alguns estudos sugerem, até, que a contra-indicação absoluta para cirurgia pode ser muito relativa.O conceito de valores preditivos pós-operatórios tem sido alvo de interesse crescente, inicialmente para o FEV1 e, mais recentemente, para a DLCO, sendo aceites valores mínimos de FEV1 de 700-1000 ml ou 30% do teórico e de DLCO de 40%.Os testes de exercício abriram novas perspectivas na avaliação do risco cirúrgico. O estudo actualmente mais recomendado é o teste incremental máximo limitado por sintomas, por apresentar maior valor preditivo de morbilidade e mortalidade pós-operatória.Vários algoritmos têm sido propostos por diferentes sociedades internacionais ou autores de referência nesta matéria, sendo mais utilizado o de Gilberth e Weisman (1994.A cirurgia de redução de volume pulmonar (CRVP exige selecção muito cuidada de candidatos, actualmente com critérios objectivos recomendados pelo National Emphysema Therapy Trial (NETT. Abstract: Preoperative pulmonary function has much progressed over the years.Many ventilatory parameters have been used and it was Markos in 1993 that decreed that surgical risk must be established based on the predictable postoperative pulmonary

  10. Capacidade funcional e fatores associados em idosos: estudo populacional Capacidade funcional y factores asociados en ancianos: estudio poblacional Functional capacity and associated factors in the elderly: a population study

    Directory of Open Access Journals (Sweden)

    Roberta Souza Freitas

    2012-01-01

    Full Text Available OBJETIVO: Analisar a associação do comprometimento da capacidade funcional com condições de saúde e fatores sociodemográficos e comportamentais entre idosos residentes em comunidade do interior do Nordeste brasileiro. MÉTODOS: Estudo transversal de base populacional realizado com 316 idosos residentes em Lafaiete Coutinho-BA. A capacidade funcional foi avaliada por escala hierárquica, verificando associação com condições de saúde e fatores sóciodemográficos e comportamentais pela técnica de regressão logística multinomial. RESULTADOS: A dependência nas atividades independentes da vida diária (AIVD foi associada ao grupo etário > 80 anos, uso de dois ou mais medicamentos e comprometimento cognitivo. A dependência nas atividades básicas da vida diária e AIVD foi associada ao grupo etário > 80 anos, falta de participação em atividades religiosas, hospitalização nos últimos 12 meses, comprometimento cognitivo e sobrepeso. CONCLUSÃO: Houve associação com comprometimento da capacidade funcional e condições de saúde e fatores sociodemográficos entre idosos residentes em comunidade no Nordeste brasileiro.OBJETIVO: Analizar la asociación del compromiso de la capacidad funcional con condiciones de salud y factores sociodemográficos y comportamentales entre ancianos residentes en una comunidad del interior del Noreste brasileño. MÉTODOS: Estudio transversal de base poblacional realizado con 316 ancianos residentes en Lafaiete Coutinho-BA. La capacidad funcional fue evaluada por una escala jerárquica, verificando asociación con condiciones de salud y factores sociodemográficos y comportamentales por la técnica de regresión logística multinomial. RESULTADOS: La dependencia en las atividades independentes de la vida diaria (AIVD fue asociada al grupo etáreo > 80 años, uso de dos o más medicamentos y compromiso cognitivo. La dependencia en las actividades básicas de la vida diária y AIVD fue asociada al grupo

  11. Evolution of metering and control equipment in district heating house substations. Smaller, smarter and unchangingly robust; Mess- und Regelungstechnik fuer Fernwaermehausstationen im Wandel der Zeit. Kleiner, intelligenter, unveraendert robust

    Energy Technology Data Exchange (ETDEWEB)

    Hesse, Wolfgang; Hilbig, Thomas [Samson AG, Frankfurt am Main (Germany)

    2011-07-15

    The technical evolution of house substations in hot water networks reflects the trend towards greater efficiency. Changes are to be seen above all in the requirements placed on the measurement and control technology used in the energy management functions of the electronic district heating controller as well as on safety equipment. Here DDC (Direct Digital Control) technology has created possibilities for optimising energy consumption. The authors relate the evolution of drinking water heating, self-operated regulators, electrical actuators and of electronic district heating controllers.

  12. Factores que influyen en la evolución y el pronóstico funcional de pacientes con fractura de cadera en la unidad de recuperación funcional de un hospital de media estancia

    OpenAIRE

    Ory López, Elva de

    2016-01-01

    1. Motivos y Justificación La fractura de cadera es una de las patologías más frecuentes en la población anciana y es previsible que su incidencia siga aumentando, dado el envejecimiento poblacional. Además, conlleva un riesgo aumentado de incapacidad funcional, institucionalización y mortalidad a medio plazo. Por estos motivos deben intensificarse los esfuerzos en reducir la incidencia de secuelas a través de programas de Rehabilitación. Es esencial estudiar los mecanismos que condicionan o ...

  13. Géneros y funciones en el Aló Presidente N°338: Un género complejo

    Directory of Open Access Journals (Sweden)

    Lilia M. Ramírez Lasso

    2012-01-01

    Full Text Available En este estudio se presenta el análisis de las estructuras discursivas que permiten la identificación de diversos géneros discursivos, y poner en evidencia la presencia de las funciones del lenguaje propuestas por R. Jakobson, en una alocución del Presidente Hugo Chávez, del programa Aló, Presidente. Con este propósito, se tomaron en consideración diversos planteamientos metodológicos del Análisis Crítico del Discurso (Van Dijk, para analizar la estructuración textual de la alocución Nº 338 del programa Aló, Presidente. Partimos de una breve revisión de la noción teórica de género y las funciones del lenguaje de Jakobson, así como de la semiótica generativa greimasiana y de la contextualización socio-histórica del corpus y la situación comunicativa en la que se enmarca. Luego del análisis de la concurrencia de las unidades identificadas en el plano de la expresión y en el plano del contenido, se propone entonces la categorización del Aló, Presidente como un género complejo, articulado por diversos géneros primarios, que se configura como un nuevo género discursivo político. Se concluye que la presencia de algunas de las funciones del lenguaje, bien en todo el texto o en algunos ámbitos temáticos específicos, parece operar como mecanismos discursivos innovadores, que buscan generar proximidad, identificación y solidaridad con el enunciador

  14. FUNCIONES EJECUTIVAS Y HABILIDAD DE REEVALUACIÓN COGNITIVA: EVIDENCIA DE SU RELACIÓN EN NIÑOS

    Directory of Open Access Journals (Sweden)

    Maria Laura Andres

    2016-01-01

    Full Text Available La habilidad de reevaluación cognitiva (HRC es una estrategia de regulación emocional que implica resignificar un evento para cambiar su impacto emocional. En los niños esta habilidad permite disminuir experiencias emocionales negativas y se ha mostrado como un factor de protección frente a la ansiedad y depresión. Sin embargo, aún restan conocer los factores que contribuyen a explicar las diferencias individuales en esta habilidad. Uno de estos factores son las funciones ejecutivas ya que contribuyen al control cognitivo de la emoción. El objetivo de este trabajo fue analizar el rol de las funciones ejecutivas en la HRC. Se evaluaron 100 niños de 9 a 12 años de edad (M=10,49; DS=1,10 en memoria de trabajo, flexibilidad cognitiva espontánea, inhibición y HRC mediante la Tarea de Amplitud Oral (Batería AWMA, prueba de Fluidez Verbal Semántica (Batería ENI y la Tarea de Identificación de Reevaluaciones Cognitivas TIRC elaborada para este estudio. Los datos se analizaron mediante regresión lineal múltiple. Los resultados mostraron que las funciones ejecutivas predecían la HRC, es decir, los niños que tuvieron mejor desempeño en funcionamiento ejecutivo mostraron mayor HRC. Se espera que estos resultados permitan profundizar el conocimiento de los procesos implicados en el control cognitivo de la emoción.

  15. Percepción del apoyo social funcional en cuidadores familiares de enfermos crónicos

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    Olga Marina Vega-Angarita

    2011-01-01

    Full Text Available Objetivo: describir la percepción del apoyo social funcional en cuidadores familiares de enfermos crónicos en San José de Cúcuta, Colombia. Método: estudio cuantitativo, descriptivo de corte transversal, con aplicación de dos instrumentos: caracterización de los cuidadores y el Cuestionario de Apoyo Social Funcional de Duke-Unc. Participaron 179 cuidadores de personas con enfermedades crónicas, no institucionalizados. Resultados: la mayoría de los cuidadores (54,7% tienen una percepción inadecuada frente al apoyo social funcional global brindado por su entorno más cercano; el 45,3% expresa lo contrario. Sobre la dimensión del apoyo confidencial el mayor porcentaje de los participantes (53,6% tiene una percepción inad cuada, mientras que el 46,4% considera que es la mejor; con un comportamiento similar en la dimensión afectiva se encontró que el 51,4% de los cuidadores tiene una percepción inadecuada, y el 48,6% la describen como adecuada. Conclusiones: los resultados reportados en las dimensiones sugieren la necesidad de que enfermería fortalezca la integración de los cuidadores en los sistemas formales e informales para que, a través de ellos, los sujetos perciban mayor apoyo de su ambiente social, facilitando así los procesos de afrontamiento y adaptación a las demandas que le plantea su nueva realidad.

  16. Aproveitamento do camu-camu (Myrciaria dubia para produção de bebida alcoólica fermentada The use of camu-camu (Myrciaria dubia for the production of a fermented alcoholic beverage

    Directory of Open Access Journals (Sweden)

    Roberto Nobuyuki Maeda

    2003-01-01

    Full Text Available O elevado teor de ácido ascórbico no camu-camu (Myrciaria dubia McVaugh, Myrtaceae desperta o interesse de extrativistas, agricultores e consumidores, e leva à necessidade de desenvolvimento de tecnologias adequadas para produção em terra firme e aproveitamento industrial do fruto. Este trabalho teve por objetivo verificar a adequação do camu-camu para a produção de bebida alcoólica fermentada, assim como o efeito do branqueamento do fruto e da incorporação da casca à polpa nas características nutricionais e sensoriais da bebida. Os frutos foram separados em quatro lotes, sendo dois branqueados (90 ºC por 7 min. Após a despolpa, as cascas de um lote de cada tratamento (com e sem branqueamento foram incorporadas às respectivas polpas e avaliadas quanto à composição química (umidade, pH, acidez, sólidos solúveis, açúcares, ácido ascórbico, compostos fenólicos, antocianinas e flavonóides. Após a correção do mosto com açúcar, pasteurização, fermentação (25 dias, trasfega, pasteurização (70 ºC por 15 min, filtragem e clarificação, as bebidas foram avaliadas quanto a composição química, edulcoradas e submetidas à análise sensorial. O branqueamento reduziu a concentração de ácido ascórbico das polpas (33 % e a agregação da casca aumentou os teores de matéria seca (39 % polpa, ácido ascórbico (33 % na polpa, 23 % no mosto e 50 % na bebida e fenólicos (50 % bebida. O perfil sensorial e a aceitabilidade sugerem que o camu-camu é adequado para a produção de bebida alcoólica fermentada e que a agregação da casca à polpa contribuiu positivamente para a aceitabilidade (6,7 com casca e 6,2 sem casca, na escala de 9 pontos. As bebidas apresentaram flavor característico do fruto, limpidez, coloração vermelho-laranjada e sabor agradável.The high levels of ascorbic acid in camu-camu (Myrciaria dubia McVaugh, Myrtaceae have stimulated interest of extractivists, farmers and consumers. This has led

  17. Utilization of nitrogen from green manure and mineral fertilizer by sugarcane Aproveitamento do nitrogênio da adubação verde e da fertilização mineral pela cana - de - açucar

    Directory of Open Access Journals (Sweden)

    Edmilson José Ambrosano

    2005-12-01

    ção mineral nitrogenada. Estudou-se o aproveitamento do nitrogênio pela cana-de-açúcar (Saccharum spp. fertilizada com crotalária júncea (Crotalaria juncea L. e sulfato de amônio (SA, marcados com 15N. Foram adicionados 195,8 kg e 70 kg de N por hectare, respectivamente, de crotalária júncea e SA, nos seguintes tratamentos: testemunha, sem adubação verde e sem SA; sem adubo verde, com SA-15N; com adubo verde-15N e com SA; com adubo verde-15N, e sem SA; com adubo verde e com SA-15N. Foram feitas quatro amostragens de folhas +3 e colhidas plantas de 2 m de linha da cultura para estimativa da produtividade. Com os resultados dos teores de N (g kg-1 e da abundância isotópica de N (% em átomos de 15N das amostras de folhas +3 e da produtividade da cana-de-açúcar, foram calculados o N-acumulado, nitrogênio na planta proveniente do fertilizante-NPPF (% e kg ha-1, e a recuperação percentual do N do fertilizante (%R. Foram realizadas análises tecnológicas da cana e calculados o pol (% e açúcares totais recuperados. As maiores porcentagens de NPPF foram encontradas após oito meses de plantio da cana para os tratamentos com adubo verde sem N-mineral e adubo verde com N-mineral, respectivamente 15,3 e 18,4%. A maior recuperação do nitrogênio foi encontrada na colheita, dezoito meses após o plantio, sendo que o tratamento com fertilizante mineral apresentou 34,4% e na soma N-mineral mais N-adubo verde apresentou 40,0%. Os tratamentos com adubo verde mais N-mineral alteraram atributos do solo e da planta, promovendo aumento nos teores de Ca e Mg, soma de bases e saturação de bases e pH, com declínio na acidez potencial no solo, bem como aumento nos teores de Ca e K na parte aérea.

  18. La motivación en los voluntarios: Una aplicación del inventario de funciones al caso Colombia

    Directory of Open Access Journals (Sweden)

    Giovanni Pérez Ortega

    2012-01-01

    Full Text Available Este artículo, basado en “El inventario de funciones del Voluntariado –IFV-”, determina cuáles son las variables que motivan a los voluntarios en Colombia, a desarrollar las actividades relacionadas con el voluntariado. Se consideraron seis dimensiones (valores, carrera, social, comprensión, protección y mejora. El análisis de los resultados muestra que los voluntarios en Colombia se motivan principalmente porque pueden trabajar por una causa que es importante para ellos y porque pueden ayudar a los menos afortunados; variables pertenecientes a la dimensión de valores.

  19. BENEFÍCIOS DO TREINAMENTO FUNCIONAL PARA O EQUILÍBRIO E PROPRIOCEPÇÃO DE DEFICIENTES VISUAIS

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    Sara Teresinha Corazza

    Full Text Available RESUMO Introdução: A deficiência visual é uma limitação sensorial que afeta 6,5 milhões de pessoas somente no Brasil, chegando a 285 milhões no mundo. Os sujeitos afetados pela deficiência visual têm dificuldade maior para manter o equilíbrio, já que a visão é um dos principais sentidos envolvidos nesse complexo processo. Para melhorar essa capacidade físico-motora e, consequentemente, a qualidade de vida desses sujeitos, é necessário aperfeiçoar os outros sistemas de propriocepção. Um dos métodos para isso é o treinamento funcional. Objetivo: Analisar os efeitos do treinamento funcional sobre a propriocepção e o equilíbrio de pessoas com deficiência visual. Métodos: O presente estudo de caso analisou três sujeitos com cegueira total ou baixa visão, durante um programa de treinamento funcional que teve duração de 12 semanas, com duas sessões semanais. O equilíbrio postural foi avaliado em uma plataforma de força, em condição bipodal e olhos vendados. A avaliação da propriocepção de membros superiores foi realizada com um cinesiômetro e a avaliação de membros inferiores foi realizada com a fixação de um flexímetro na articulação do joelho dominante do participante, ambas com os olhos vendados. Os resultados foram analisados de maneira descritiva e utilizando a técnica de análise de séries temporais. Resultados: Todos os sujeitos apresentaram melhora do equilíbrio postural. Com respeito à propriocepção do membro superior, o sujeito 1 (S1 apresentou melhora e quanto à propriocepção do membro inferior todos os sujeitos apresentaram melhora. Conclusão: Dessa forma, os resultados sugerem que o treinamento funcional influenciou positivamente o equilíbrio e a propriocepção desses indivíduos.

  20. FUNCIONES EJECUTIVAS Y HABILIDAD DE REEVALUACIÓN COGNITIVA: EVIDENCIA DE SU RELACIÓN EN NIÑOS

    OpenAIRE

    Maria Laura Andres; Claudia Castañeiras; Florencia Stelzer; Lorena Canet Juric; Isabel Introzzi

    2016-01-01

    La habilidad de reevaluación cognitiva (HRC) es una estrategia de regulación emocional que implica resignificar un evento para cambiar su impacto emocional. En los niños esta habilidad permite disminuir experiencias emocionales negativas y se ha mostrado como un factor de protección frente a la ansiedad y depresión. Sin embargo, aún restan conocer los factores que contribuyen a explicar las diferencias individuales en esta habilidad. Uno de estos factores son las funciones ejecutivas ya que c...