WorldWideScience

Sample records for whole-building hygrothermal performance

  1. Danish and Brazilian Modeling of Whole-Building Hygrothermal Performance

    DEFF Research Database (Denmark)

    Rode, Carsten; Mendes, Nathan; Grau, Karl

    2006-01-01

    elements of buildings. In turn, the moisture and humidity conditions have significant impact on how buildings are operated. In hot-humid climates it may be desirable to keep the ventilation rates low in order to avoid too high indoor humidity, while in cold climates ventilation can be used to keep...... the humidity low and thus reduce the risk of moisture damage in the building enclosure. In either case the indoor humidity has a direct or indirect impact on the energy performance of the HVAC system of a building. To analyze this situation, one could benefit from some recent developments in integrated...

  2. Whole-Building Hygrothermal Modeling in IEA Annex 41

    DEFF Research Database (Denmark)

    Rode, Carsten; Woloszyn, Monika

    2007-01-01

    Annex 41 of the International Energy Agency’s (IEA) Energy Conservation in Buildings and Community Systems program (ECBCS) is a cooperative project on “Whole-Building Heat, Air, and Moisture Response” (MOIST-ENG). Subtask 1 of that project set out to advance development in modeling the ntegral heat....... The IEA Annex 41 project runs from 2004–2007, coming to conclusion just before the Thermal Performance of the Exterior Envelopes of Whole Buildings X conference. The Annex 41 project and its Subtask 1 do not aim to produce one state-of-the-art hygrothermal simulation model for whole buildings, but rather...

  3. Moisture buffering and its consequence in whole building hygrothermal modeling

    DEFF Research Database (Denmark)

    Rode, Carsten; Grau, Karl

    2008-01-01

    of building products to improve indoor air quality and to save energy. Of interest therefore is to establish a unit to appraise this quality of building products and to investigate the importance of moisture buffering when it is considered in whole building hygrothermal simulation. This paper will illustrate...... both. A new test method specifies a protocol for determination of what has recently been termed the Moisture Buffer Value (MBV) of building products. The paper presents the definition of MBV and introduces a test protocol which has been proposed for its experimental determination. The MBV is primarily...... possible benefits on energy consumption if humidity-controlled ventilation is employed, as well some benefit on the indoor acceptability with the hygrothermal quality of indoor air. However, both benefits seem to be somewhat limited in the model room used for analysis....

  4. A Model for Air Flow in Ventilated Cavities Implemented in a Tool for Whole-Building Hygrothermal Analysis

    DEFF Research Database (Denmark)

    Grau, Karl; Rode, Carsten

    2006-01-01

    A model for calculating air flows in ventilated cavities has been implemented in the whole-building hygrothermal simulation tool BSim. The tool is able to predict indoor humidity conditions using a transient model for the moisture conditions in the building envelope.......A model for calculating air flows in ventilated cavities has been implemented in the whole-building hygrothermal simulation tool BSim. The tool is able to predict indoor humidity conditions using a transient model for the moisture conditions in the building envelope....

  5. Implementation of Models for Building Envelope Air Flow Fields in a Whole Building Hygrothermal Simulation Tool

    DEFF Research Database (Denmark)

    Rode, Carsten; Grau, Karl

    2009-01-01

    phenomena which occur. However, there is still room for further development of such tools. This paper will present an attempt to integrate modelling of air flows in building envelopes into a whole building hygrothermal simulation tool. Two kinds of air flows have been considered: 1. Air flow in ventilated...... and moisture impact of these air flows which represent either (1) a part of the building envelope which has hitherto not been offered much focus in building simulation, or (2) a transport form which in most cases should be kept minimal but which has immense importance on the overall heat and moisture flows......Simulation tools are becoming available which predict the heat and moisture conditions in the indoor environment as well as in the envelope of buildings, and thus it has become possible to consider the important interaction between the different components of buildings and the different physical...

  6. Implementation of Models for Building Envelope Air Flow Fields in a Whole Building Hygrothermal Simulation Tool

    DEFF Research Database (Denmark)

    Sørensen, Karl Grau; Rode, Carsten

    2009-01-01

    phenomena that occur. However, there is still room for further development of such tools. This paper will present an attempt to integrate modelling of air flows in building envelopes into a whole building hygrothermal simulation tool. Two kinds of air flows have been considered: (1) Air flow in a ventilated......Simulation tools are becoming available which predict the heat and moisture conditions in the indoor environment as well as in the envelope of buildings, and thus it has become possible to consider the important interaction between the different components of buildings and the different physical...... cavity such as behind the exterior cladding of a building envelope, i.e. a flow which is parallel to the construction plane. (2) Infiltration/exfiltration of air through the building envelope, i.e. a flow which is perpendicular to the constructionplane. The paper presents the models and how they have...

  7. Can crawl space temperature and moisture conditions be calculated with a whole-building hygrothermal simulation tool?

    DEFF Research Database (Denmark)

    Vanhoutteghem, Lies; Morelli, Martin; Sørensen, Lars Schiøtt

    2017-01-01

    The hygrothermal behaviour of an outdoor ventilated crawl space with two different designs of the floor structure was investigated. The first design had 250 mm insulation and visible wooden beams towards the crawl space. The second design had 300 mm insulation and no visible wooden beams. One year...... of measurements was compared with simulations of temperature and moisture condition in the floor structure and crawl space. The measurements showed that the extra 50 mm insulation placed below the beams reduced moisture content in the beams below 20 weight% all year. A reasonable agreement between...... the measurements and simulations was found; however, the evaporation from the soil was a dominant parameter affecting the hygrothermal response in the crawl space and floor structure....

  8. Building Enclosure Hygrothermal Performance Study, Phase 1

    Energy Technology Data Exchange (ETDEWEB)

    Karagiozis, A.N.

    2002-08-08

    The moisture performance of three different classes of wall systems has been investigated in the context of the preliminary hygrothermal analysis of walls in Seattle. The results reported in this phase specifically address the moisture performance of walls designed with loads that have some unintentional water penetration. The results have been developed in a manner to present the relative performance of the walls in the same climate with similar water penetration effects. The analysis was performed with the best available input data. Several limitations should be recognized within the context of this study. Results showed that selection of wooden sheathing boards on interior vapor-tight assemblies does not significantly influence the performance of stucco-clad walls. A larger effect was observed when the interior vapor control is made vapor open. When continuous cavity ventilation is employed, the effect of the selection of the type of sheathing board on the hygrothermal performance of the wall was found to be negligible. When comparing oriented strand board sheathing performance against the performance of exterior grade gypsum, the differences are very significant in terms of the amount of moisture content present in the walls. Moisture content alone does not indicate their respective durability as durability is directly related to the combination of relative humidity and temperature, mechanical, chemical, and biological properties of the substrates. This study did not investigate the durability performance of either sheathing. In terms of interior vapor control, inhabitant behavior must be considered during the wall hygrothermal design stage. If interior relative humidity is maintained below 60%, then a latex primer and paint may perform better than the use of PVA or even a polyethylene sheet. When the interior environment is maintained at a higher relative humidity, then stricter vapor control is needed. Multilayered building paper was experimentally shown to

  9. Whole Building Cost and Performance Measurement: Data Collection Protocol Revision 2

    Energy Technology Data Exchange (ETDEWEB)

    Fowler, Kimberly M.; Spees, Kathleen L.; Kora, Angela R.; Rauch, Emily M.; Hathaway, John E.; Solana, Amy E.

    2009-03-27

    This protocol was written for the Department of Energy’s Federal Energy Management Program (FEMP) to be used by the public as a tool for assessing building cost and performance measurement. The primary audiences are sustainable design professionals, asset owners, building managers, and research professionals within the Federal sector. The protocol was developed based on the need for measured performance and cost data on sustainable design projects. Historically there has not been a significant driver in the public or private sector to quantify whole building performance in comparable terms. The deployment of sustainable design into the building sector has initiated many questions on the performance and operational cost of these buildings.

  10. Hygrothermal Performance of West Coast Wood Deck Roofing System

    Energy Technology Data Exchange (ETDEWEB)

    Pallin, Simon B. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Kehrer, Manfred [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Desjarlais, Andre Omer [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2014-02-01

    Simulations of roofing assemblies are necessary in order to understand and adequately predict actual the hygrothermal performance. At the request of GAF, simulations have been setup to verify the difference in performance between white and black roofing membrane colors in relation to critical moisture accumulation for traditional low slope wood deck roofing systems typically deployed in various western U.S. Climate Zones. The performance of these roof assemblies has been simulated in the hygrothermal calculation tool of WUFI, from which the result was evaluated based on a defined criterion for moisture safety. The criterion was defined as the maximum accepted water content for wood materials and the highest acceptable moisture accumulation rate in relation to the risk of rot. Based on the criterion, the roof assemblies were certified as being either safe, risky or assumed to fail. The roof assemblies were simulated in different western climates, with varying insulation thicknesses, two different types of wooden decking, applied with varying interior moisture load and with either a high or low solar absorptivity at the roof surface (black or white surface color). The results show that the performance of the studied roof assemblies differs with regard to all of the varying parameters, especially the climate and the indoor moisture load.

  11. Whole-building Hygrothermal Simulation Model

    DEFF Research Database (Denmark)

    Rode, Carsten; Grau, Karl

    2003-01-01

    An existing integrated simulation tool for dynamic thermal simulation of building was extended with a transient model for moisture release and uptake in building materials. Validation of the new model was begun with comparison against measurements in an outdoor test cell furnished with single...... materials. Almost quasi-steady, cyclic experiments were used to compare the indoor humidity variation and the numerical results of the integrated simulation tool with the new moisture model. Except for the case with chipboard as furnishing, the predictions of indoor humidity with the detailed model were...

  12. Hygrothermal Properties and Performance of Sea Grass Insulation

    DEFF Research Database (Denmark)

    Eriksen, Marlene Stenberg Hagen; Laursen, Theresa Back; Rode, Carsten

    2008-01-01

    In the attempt to obtain knowledge of the hygrothermal properties of sea grass as thermal insulation, experiments have been carried out in the laboratory to determine the thermal conductivity, sorption properties and the water vapour permeability of the material. In order to investigate...

  13. Hygrothermal behavior for a clay brick wall

    Science.gov (United States)

    Allam, R.; Issaadi, N.; Belarbi, R.; El-Meligy, M.; Altahrany, A.

    2018-01-01

    In Egypt, the clay brick is the common building materials which are used. By studying clay brick walls behavior for the heat and moisture transfer, the efficient use of the clay brick can be reached. So, this research studies the hygrothermal transfer in this material by measuring the hygrothermal properties and performing experimental tests for a constructed clay brick wall. We present the model for the hygrothermal transfer in the clay brick which takes the temperature and the vapor pressure as driving potentials. In addition, this research compares the presented model with previous models. By constructing the clay brick wall between two climates chambers with different boundary conditions, we can validate the numerical model and analyze the hygrothermal transfer in the wall. The temperature and relative humidity profiles within the material are measured experimentally and determined numerically. The numerical and experimental results have a good convergence with 3.5% difference. The surface boundary conditions, the ground effect, the infiltration from the closed chambers and the material heterogeneity affects the results. Thermal transfer of the clay brick walls reaches the steady state very rapidly than the moisture transfer. That means the effect of using only the external brick wall in the building in hot climate without increase the thermal resistance for the wall, will add more energy losses in the clay brick walls buildings. Also, the behavior of the wall at the heat and mass transfer calls the three-dimensional analysis for the whole building to reach the real behavior.

  14. Investigation of the Hygrothermal Performance of Alternative Insulation Materials

    DEFF Research Database (Denmark)

    Rode, Carsten; Kristiansen, Finn Harken; Rasmussen, Niels T.

    1999-01-01

    The paper gives an account of hygrothermal investigations carried out on some insulation products which are "alternative" to the ones that are traditionally used in Danish constructions. The alternative products are claimed to be friendly both to the environment and to the labour force....... The materials investigated are: cellulose insulation, sheep's wool, flax, and perlite. These materials, except for the last one, are very hygroscopic. The following two separate investigations are described.1. Investigation of the thermal conductivity at different humidity conditions.The thermal conductivity...... designs prescribed by manufacturers of alternative insulation materials.Both investigations are compared against similar results when mineral fibre insulation is used....

  15. Common Exercises in Whole Building HAM Modelling

    DEFF Research Database (Denmark)

    2008-01-01

    Subtask 1 of the IEA Annex 41 project had the purpose to advance the development in modelling the integral heat, air and moisture transfer processes that take place in “whole buildings”. Such modelling comprises all relevant elements of buildings: The indoor air, the building envelope, the inside...... constructions, furnishing, systems and users. The building elements interact with each other and with the outside climate. The Annex 41 project and its Subtask 1 has not aimed to produce one state-of–the-art hygrothermal simulation model for whole buildings but rather to stimulate the participants’ own...

  16. Cold Climate Foundation Retrofit Experimental Hygrothermal Performance. Cloquet Residential Research Facility Laboratory Results

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, Louise F. [NorthernSTAR, St. Paul, MN (United States); Harmon, Anna C. [NorthernSTAR, St. Paul, MN (United States)

    2015-04-09

    This project was funded jointly by the National Renewable Energy Laboratory (NREL) and Oak Ridge National Laboratory (ORNL). ORNL focused on developing a full basement wall system experimental database to enable others to validate hygrothermal simulation codes. NREL focused on testing the moisture durability of practical basement wall interior insulation retrofit solutions for cold climates. The project has produced a physically credible and reliable long-term hygrothermal performance database for retrofit foundation wall insulation systems in zone 6 and 7 climates that are fully compliant with the performance criteria in the 2009 Minnesota Energy Code. These data currently span the period from November 10, 2012 through May 31, 2014 and are anticipated to be extended through November 2014. The experimental data were configured into a standard format that can be published online and that is compatible with standard commercially available spreadsheet and database software.

  17. Developing Innovative Wall Systems that Improve Hygrothermal Performance of Residential Buildings

    Energy Technology Data Exchange (ETDEWEB)

    Robert Tichy; Chuck Murray

    2006-05-31

    This document serves as the Topical Report documenting work completed by Washington State University (WSU) under U.S. Department of Energy Grant, Developing Innovative Wall Systems that Improve Hygrothermal Performance of Residential Buildings. This project was conducted in collaboration with Oak Ridge National Laboratory (ORNL), and includes the participation of several industry partners including Weyerhaeuser, APA - The Engineered Wood Association, CertainTeed Corporation and Fortifiber. This document summarizes work completed by Washington State University August 2002 through June 2006. WSU's primary experimental role is the design and implementation of a field testing protocol that monitored long term changes in the hygrothermal response of wall systems. During the project period WSU constructed a test facility, developed a matrix of test wall designs, constructed and installed test walls in the test facility, installed instrumentation in the test walls and recorded data from the test wall specimens. Each year reports were published documenting the hygrothermal response of the test wall systems. Public presentation of the results was, and will continue to be, made available to the building industry at large by industry partners and the University.

  18. A Stable Whole Building Performance Method for Standard 90.1-Part II

    Energy Technology Data Exchange (ETDEWEB)

    Rosenberg, Michael I.; Eley, Charles

    2016-06-01

    In May of 2013 we introduced a new approach for compliance with Standard 90.1 that was under development based on the Performance Rating Method of Appendix G to Standard 90.11. Since then, the approach has been finalized through Addendum BM to Standard 90.1-2013 and will be published in the 2016 edition of the Standard. In the meantime, ASHRAE has published an advanced copy of Appendix G including Addendum BM and several other addenda so that software developers and energy program administrators can get a preview of what is coming in the 2016 edition of the Standard2. This article is an update on Addendum BM, summarizes changes made to the original concept as introduced in May of 2013, and provides an approach for developing performance targets for code compliance and beyond code programs.

  19. Cold Climate Foundation Retrofit Experimental Hygrothermal Performance: Cloquet Residential Research Facility Laboratory Results

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, Louise F. [NorthernSTAR, St. Paul, MN (United States); Harmon, Anna C. [NorthernSTAR, St. Paul, MN (United States)

    2015-04-01

    Thermal and moisture problems in existing basements create a unique challenge because the exterior face of the wall is not easily or inexpensively accessible. This approach addresses thermal and moisture management from the interior face of the wall without disturbing the exterior soil and landscaping. the interior and exterior environments. This approach has the potential for improving durability, comfort, and indoor air quality. This project was funded jointly by the National Renewable Energy Laboratory (NREL) and Oak Ridge National Laboratory (ORNL). ORNL focused on developing a full basement wall system experimental database to enable others to validate hygrothermal simulation codes. NREL focused on testing the moisture durability of practical basement wall interior insulation retrofit solutions for cold climates. The project has produced a physically credible and reliable long-term hygrothermal performance database for retrofit foundation wall insulation systems in zone 6 and 7 climates that are fully compliant with the performance criteria in the 2009 Minnesota Energy Code. The experimental data were configured into a standard format that can be published online and that is compatible with standard commercially available spreadsheet and database software.

  20. Fiber Reinforcement Architectures of PMCs on the Hygrothermal-Mechanical Performance for Aeropropulsion Applications

    Science.gov (United States)

    Shin, Eugene; Thesken, John; Sutter, James; Chuang, Kathy; Juhas, John; Veverka, A.; Inghram, L.; Burke, C.; Fink, J. E.; Arendt, C.

    2003-01-01

    A rigid lightweight sandwich support structure, for the combustor chamber of a new generation liquid propellant rocket engine, was designed and fabricated using Polymer Matric Composite (PMC) facesheet on a Ti honeycomb or Carbon foam core. The facesheet consisted of high stiffness carbon fiber, M40JB, and high temperature Polyimides, such as PMR-11-50 and HFPE-II. Six different fiber architectures; 4HS woven fabric, uni-fabric, woven-uni hybrid, stitched woven fabric, stitched uni-fabric and tri-axial braided structures have been investigated for optimum stiffness-thickness-weight-performance design criteria for the hygrothermal-mechanical propulsion service exposure conditions including rapid heating up to 200 F/sec, maximum operating temperature of 600 F, internal pressure up to 100 psi. An extensive property and performance database including dry-wet mechanical properties at both 25 F and 600 F in various loading modes, thermal and physical properties including blistering onset condition was developed for fiber architecture down-selection and design guidelines. Various optimized process methods including vacuum bag compression molding, solvent assistant RTM (SaRTM), resin film infusion (RFI) were utilized for PMC panel fabrication depending on the architecture type. In the case of stitched woven fabric architecture, the optimal stitch pattern was chosen in terms of stitch density and yarn size, based on both in-plane mechanical properties and blistering performance. Potential reduction of the in-plane properties transverse to the line of stitching was also evaluated. Attempt to correlate the experimental results with theoretical micro-mechanics predictions will be presented.

  1. Effects of Fiber Reinforcement Architecture on the Hygrothermal-Mechanical Performance of Polyimide Matrix Composites for Aeropropulsion Applications

    Science.gov (United States)

    Shin, E. Eugene; Thesken, John C.; Sutter, James K.; Chuang, Kathy; Juhas, John; Veverka, Adrienne; Inghram, Linda; Papadopoulos, Demetrios; Burke, Chris; Scheiman, Dan

    2003-01-01

    A lightweight sandwich support structure, for the combustor chamber of a new generation liquid propellant rocket engine, was designed and fabricated using a polymer matrix composite (PMC) facesheet on a Ti honeycomb core. The PMC facesheet consisted of high stiffness carbon fiber, M40JB, and high temperature Polyimides, such as PMR-II-50 and HFPE-II-52. Six different fiber architectures; four harness satin (4HS) woven fabric, uni-tape, woven-uni hybrid, stitched woven fabric, stitched uni-tape and triaxial braided structures have been investigated for optimum stiffness-thickness-weight-hygrothermal performance design criteria for the hygrothermal-mechanical propulsion service exposure conditions including rapid heating up to 200 F/sec, maximum operating temperature of 600 F, internal pressure up to 100 psi. One of the specific objectives in this study is to improve composite blistering resistance in z-direction at minimum expense of in-plane mechanical properties. An extensive property-performance database including dry-wet mechanical properties at various temperatures, thermal-physical properties, such as blistering onset condition was generated for fiber architecture down-selection and design guidelines. Various optimized process methods such as vacuum bag compression molding, solvent assistant resin transfer molding (SaRTM), resin film infusion (RFI) and autoclaving were utilized for PMC panel fabrication depending on the architecture type. In the case of stitched woven fabric architecture, the stitch pattern in terms of stitch density and yarn size was optimized based on both in-plane mechanical properties and blistering performance. Potential reduction of the in-plane properties transverse to the line of stitching was also evaluated. Efforts have been made to correlate the experimental results with theoretical micro-mechanics predictions. Changes in deformation mechanism and failure sequences in terms of fiber architecture will be discussed.

  2. Impact of Moistened Bio-insulation on Whole Building Energy Use

    Directory of Open Access Journals (Sweden)

    Latif Eshrar

    2017-01-01

    Full Text Available One of the key properties of hemp insulation is its moisture adsorption capacity. Adsorption of moisture can increase both thermal conductivity and heat capacity of the insulation. The current study focuses on the effect of moisture induced thermal mass of installed hemp insulation on the whole building energy use. Hygrothermal and thermal simulations were performed using the CIBSE TRY weather data of Edinburgh and Birmingham with the aid of following simulation tools: WUFI and IES. Following simplified building types were considered: building-1 with dry hemp wall and loft insulations, building-2 with moistened hemp wall and loft insulation and building-3 with stone wool insulation. It was observed that the overall conditioning load of building-1 was 1.2 to 2.3% higher than building-2 and 3. However, during the summer season, the cooling load of building-2 was 3-7.5% lower than the other buildings. It implies that, moistened insulation can potentially mitigate the effect of increasing cooling degree days induced by global warming.

  3. State-of-the-Art for Hygrothermal Simulation Tools

    Energy Technology Data Exchange (ETDEWEB)

    Boudreaux, Philip R. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); New, Joshua Ryan [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shrestha, Som S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Adams, Mark B. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pallin, Simon B. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-02-01

    The hygrothermal (heat and moisture) performance of buildings can be assessed by utilizing simulation tools. There are currently a number of available hygrothermal calculation tools available which vary in their degree of sophistication and runtime requirements. This report investigates three of the most commonly used models (WUFI, HAMT, and EMPD) to assess their limitations and potential to generate physically realistic results to prioritize improvements for EnergyPlus (which uses HAMT and EMPD). The outcome of the study shows that, out of these three tools, WUFI has the greatest hygrothermal capabilities. Limitations of these tools were also assessed including: WUFI’s inability to properly account for air leakage and transfer at surface boundaries; HAMT’s inability to handle air leakage, precipitationrelated moisture problems, or condensation problems from high relative humidity; and multiple limitations for EMPD as a simplified method to estimate indoor temperature and humidity levels and generally not used to estimate the hygrothermal performance of the building envelope materials. In conclusion, out of the three investigated simulation tools, HAMT has the greatest modeling potential, is open source, and we have prioritized specific features that can enable EnergyPlus to model all relevant heat and moisture transfer mechanisms that impact the performance of building envelope components.

  4. Hygrothermal Simulation of Foundations: Part 1 - Soil Material Properties

    Energy Technology Data Exchange (ETDEWEB)

    Kehrer, Manfred [ORNL; Pallin, Simon B [ORNL

    2012-10-01

    The hygrothermal performance of soils coupled to buildings is a complicated process. A computational approach for heat transfer through the ground has been well defined (EN ISO 13370:2007, 2007), and simplified methods have been developed (Staszczuk, Radon, and Holm 2010). However, these approaches generally ignore the transfer of soil moisture, which is not negligible (Janssen, Carmeliet, and Hens 2004). This study is divided into several parts. The intention of the first part is to gather, comprehend and adapt soil properties from Soil Science. The obtained information must be applicable to related tasks in Building Science and validated with hygrothermal calculation tools. Future parts of this study will focus on the validation aspect of the soil properties to be implemented. Basic changes in the software code may be requested at this time. Different types of basement construction will be created with a hygrothermal calculation tool, WUFI. Simulations from WUFI will be compared with existing or ongoing measurements. The intentions of the first part of this study have been fulfilled. The soil properties of interest in Building Science have been defined for 12 different soil textures. These properties will serve as input parameters when performing hygrothermal calculations of building constructions coupled to soil materials. The reliability of the soil parameters will be further evaluated with measurements in Part 2.

  5. An evaluation of the hygrothermal performance of standard and as-built construction details using steady-state and transient modelling

    Energy Technology Data Exchange (ETDEWEB)

    Mumovic, D.; Davies, M.; Ridley, I. [London Univ., London (United Kingdom). Bartlett School of Graduate Studies; Oreszczyn, T.; Bell, M; Smith, M; Miles-Shenton, D. [Leeds Metropolitan Univ., Leeds (United Kingdom). School of the Built Environment

    2005-07-01

    The accurate assesment of both interstitial and surface condensation of buildings at the design stage is important in order to minimize the damaging effects of moisture as well as to preserve adequate indoor air quality. Relevant guidance on this matter has recently been published as a set of Robust Construction Details (RCD) in the United Kingdom. However, the translation of the available guidance into a specific design, and in construction on site is often very different from the ideal scenarios set out in the RCD. This paper investigated the suitability of relevant calculation methods used to assess the risk of surface and interstitial condensation and mold growth. It was suggested that limitations have arisen from the assumption of non-transient heat and moisture transport in the new Hygrothermal Performance of Building Components and Building Elements Standard (BS EN ISO 13788:2002). In order to address this issue, 15 different construction sites were selected as part of a survey. A set of 19 different RCD cases were selected for both surface and interstitial condensation risk assessment. Two cases were then chosen to exemplify the issues concerned. A comparison was made between the results obtained for surface and interstitial relative humidity using both simple steady-state and complex transient models. The results of the comparison provided a quantitative indication of the types of errors which simple steady state modeling may introduce. Inter-model comparisons of the simulation packages were applied to the 2 sample RCDs. A comparison of the predicted performance of the RCDs in their standard and as-built forms was made. Two thermal analysis software packages were used, TRISCO, which is based on the simple steady state method of calculation as defined in the BS EN ISO 13788:2002, and VOLTRA, a transient version of TRISCO, which was used for transient analyses. A non-uniform Cartesian coordinate system was set up. Details were modeled in 2-dimension. Two

  6. Effects of Exterior Insulation on Moisture Performance of Wood-Frame Walls in the Pacific Northwest: Measurements and Hygrothermal Modeling

    Science.gov (United States)

    Samuel V. Glass; Borjen Yeh; Benjamin J. Herzog

    2016-01-01

    Continuous exterior insulation on above-grade walls is becoming more common in many parts of North America. It is generally accepted that exterior insulation provides advantages for energy performance, by reducing thermal bridging, and for moisture performance, by warming the wood structural members, thereby reducing the potential for wintertime moisture accumulation....

  7. Practical Integration Approach and Whole Building Energy Simulation of Three Energy Efficient Building Technologies: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Miller, J. P.; Zhivov, A.; Heron, D.; Deru, M.; Benne, K.

    2010-08-01

    Three technologies that have potential to save energy and improve sustainability of buildings are dedicated outdoor air systems, radiant heating and cooling systems and tighter building envelopes. To investigate the energy savings potential of these three technologies, whole building energy simulations were performed for a barracks facility and an administration facility in 15 U.S. climate zones and 16 international locations.

  8. Whole Building Efficiency for Whole Foods: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Deru, M.; Doebber, I.; Hirsch, A.

    2013-02-01

    The National Renewable Energy Laboratory partnered with Whole Foods Market under the Commercial Building Partnership (CBP) program to design and implement a new store in Raleigh, North Carolina. The result was a design with a predicted energy savings of 40% over ASHRAE Standard 90.1-2004, and 25% energy savings over their standard design. Measured performance of the as-built building showed that the building did not achieve the predicted performance. A detailed review of the project several months after opening revealed a series of several items in construction and controls items that were not implemented properly and were not fully corrected in the commissioning process.

  9. Cold Climate Foundation Retrofit Energy Savings. The Simulated Energy and Experimental Hygrothermal Performance of Cold Climate Foundation Wall Insulation Retrofit Measures -- Phase I, Energy Simulation

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, Louise F. [NorthernSTAR Building America Partnership, Minneapolis, MN (United States); Steigauf, Brianna [NorthernSTAR Building America Partnership, Minneapolis, MN (United States)

    2013-04-01

    A split simulation whole building energy / 3-dimensional earth contact model (termed the BUFETS/EnergyPlus Model or BEM) capable of modeling the full range of foundation systems found in the target retrofit housing stock has been extensively tested. These foundation systems that include abovegrade foundation walls, diabatic floors or slabs as well as lookout or walkout walls, currently cannot be modeled within BEopt.

  10. Cold Climate Foundation Retrofit Energy Savings: The Simulated Energy and Experimental Hygrothermal Performance of Cold Climate Foundation Wall Insulation Retrofit Measures -- Phase I, Energy Simulation

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, L. F.; Steigauf, B.

    2013-04-01

    A split simulation whole building energy/3-dimensional earth contact model (termed the BUFETS/EnergyPlus Model or BEM) capable of modeling the full range of foundation systems found in the target retrofit housing stock has been extensively tested. These foundation systems that include abovegrade foundation walls, diabatic floors or slabs as well as lookout or walkout walls, currently cannot be modeled within BEopt.

  11. Hygrothermal Behavior, Building Pathology and Durability

    CERN Document Server

    Delgado, JMPQ

    2013-01-01

    The main purpose of this book, Hygrothermal, Building Pathology and Durability, is to provide a collection of recent research works to contribute to the systematization and dissemination of knowledge related to construction pathology, hygrothermal behaviour of buildings, durability and diagnostic techniques and, simultaneously, to show the most recent advances in this domain. It includes a set of new developments in the field of building physics and hygrothermal behaviour, durability approach for historical and old buildings and building pathology vs. durability. The book is divided in several chapters that are a resume of the current state of knowledge for benefit of professional colleagues, scientists, students, practitioners, lecturers and other interested parties to network.

  12. Hygrothermal behavior, building pathology and durability

    Energy Technology Data Exchange (ETDEWEB)

    Peixoto de Freitas V.; Delgado, J.M.P.Q. (eds.) [Porto Univ. (Portugal). Building Physics Lab.

    2013-03-01

    Includes a set of new developments in the field of building physics and hygrothermal behavior. Presents a new durability approach for historical and old buildings. Reviews the current state of knowledge. The main purpose of this book, Hygrothermal, Building Pathology and Durability, is to provide a collection of recent research works to contribute to the systematization and dissemination of knowledge related to construction pathology, hygrothermal behaviour of buildings, durability and diagnostic techniques and, simultaneously, to show the most recent advances in this domain. It includes a set of new developments in the field of building physics and hygrothermal behaviour, durability approach for historical and old buildings and building pathology vs. durability. The book is divided in several chapters that are a resume of the current state of knowledge for benefit of professional colleagues, scientists, students, practitioners, lecturers and other interested parties to network.

  13. Providing driving rain data for hygrothermal calculations

    DEFF Research Database (Denmark)

    Kragh, Mikkel Kristian

    1996-01-01

    Due to a wish for driving rain data as input for hygrothermal calculations, this report deals with utilizing commonly applied empirical relations and standard meteorological data, in an attempt to provide realistic estimates rather than exact correlations.......Due to a wish for driving rain data as input for hygrothermal calculations, this report deals with utilizing commonly applied empirical relations and standard meteorological data, in an attempt to provide realistic estimates rather than exact correlations....

  14. Hygrothermal characterization of the viscoelastic properties of Gore-Select® 57 proton exchange membrane

    Science.gov (United States)

    Patankar, Kshitish A.; Dillard, David A.; Case, Scott W.; Ellis, Michael W.; Lai, Yeh-Hung; Budinski, Michael K.; Gittleman, Craig S.

    2008-09-01

    When a proton exchange membrane (PEM) based fuel cell is placed in service, hygrothermal stresses develop within the membrane and vary widely with internal operating environment. These hygrothermal stresses associated with hygral contraction and expansion at the operating conditions are believed to be critical in membrane mechanical integrity and durability. Understanding and accurately modeling the viscoelastic constitutive properties of a PEM is important for making hygrothermal stress predictions in the cyclic temperature and humidity environment of operating fuel cells. The tensile stress relaxation moduli of a commercially available PEM, Gore-Select® 57, were obtained over a range of humidities and temperatures. These tests were performed using TA Instruments 2980 and Q800 dynamic mechanical analyzers (DMA), which are capable of applying specified tensile loading conditions on small membrane samples at a given temperature. A special humidity chamber was built in the form of a cup that encloses tension clamps of the DMA. The chamber was inserted in the heating furnace of the DMA and connected to a gas humidification unit by means of plastic tubing through a slot in the chamber. Stress relaxation data over a temperature range of 40 90°C and relative humidity range of 30 90% were obtained. Thermal and hygral master curves were constructed using thermal and hygral shift factors and were used to form a hygrothermal master curve using the time temperature moisture superposition principle. The master curve was also constructed independently using just one shift factor. The hygrothermal master curve was fitted with a 10-term Prony series for use in finite element software. The hygrothermal master curve was then validated using longer term tests. The relaxation modulus from longer term data matches well with the hygrothermal master curve. The long term test showed a plateau at longer times, suggesting an equilibrium modulus.

  15. Setting Whole-Building Absolute Energy Use Targets for the K-12 School, Retail, and Healthcare Sectors: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Leach, M.; Bonnema, E.; Pless, S.; Torcellini, P.

    2012-08-01

    This paper helps owners' efficiency representatives to inform executive management, contract development, and project management staff as to how specifying and applying whole-building absolute energy use targets for new construction or renovation projects can improve the operational energy performance of commercial buildings.

  16. Hygrothermal Anaylsis of Wood-Frame Wall Assemblies in a Mixed-Humid Climate

    Science.gov (United States)

    Samuel V. Glass

    2013-01-01

    This study uses a one-dimensional hygrothermal model to investigate the moisture performance of 10 residential wood-frame wall assemblies in a representative mixed-humid climate location of Baltimore, Maryland (climate zone 4A). All the assemblies include oriented strandboard (OSB) sheathing and vinyl siding. The walls differ in stud cavity thickness, level of cavity...

  17. Hygrothermal Material Properties for Soils in Building Science

    Energy Technology Data Exchange (ETDEWEB)

    Kehrer, Manfred [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pallin, Simon B. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-01-01

    Hygrothermal performance of soils coupled to buildings is complicated because of the dearth of information on soil properties. However they are important when numerical simulation of coupled heat and moisture transport for below-grade building components are performed as their temperature and moisture content has an influence on the durability of the below-grade building component. Soils can be classified by soil texture. According to the Unified Soil Classification System (USCA), 12 different soils can be defined on the basis of three soil components: clay, sand, and silt. This study shows how existing material properties for typical American soils can be transferred and used for the calculation of the coupled heat and moisture transport of building components in contact with soil. Furthermore a thermal validation with field measurements under known boundary conditions is part of this study, too. Field measurements for soil temperature and moisture content for two specified soils are carried out right now under known boundary conditions. As these field measurements are not finished yet, the full hygrothermal validation is still missing

  18. Parametric Instability of Square Laminated Plates in Hygrothermal Environment

    Directory of Open Access Journals (Sweden)

    Manoj Kumar Rath

    2013-01-01

    Full Text Available The present paper investigates the parametric instability of square laminated plates subjected to periodic dynamic loadings in hygrothermal environment. The effects of various parameters like the increase in static load factor and the degree of orthotropy of simply supported composite plates at elevated temperatures and moisture concentrations on the principal instability regions are investigated using finite element method. The effects of transverse shear deformation and rotary inertia are used to study the antisymmetric angle-ply square plates. A simple laminated plate model is developed for the parametric instability of square laminated plates subjected to hygrothermal loading. A computer program based on FEM in MATLAB environment is developed to perform all necessary computations. The results show that instability of square laminated plates occurs for different parameters with an increase in temperature and moisture environment. The onset of instability occurs earlier, and the width of dynamic instability regions increases with a rise in temperature and moisture for different parameters. The effect of damping shows that there is a finite critical value of dynamic load factor for each instability region below which the square laminated plates cannot become unstable.

  19. Hygrothermal Simulation: A Tool for Building Envelope Design Analysis

    Science.gov (United States)

    Samuel V. Glass; Anton TenWolde; Samuel L. Zelinka

    2013-01-01

    Is it possible to gauge the risk of moisture problems while designing the building envelope? This article provides a brief introduction to computer-based hygrothermal (heat and moisture) simulation, shows how simulation can be useful as a design tool, and points out a number of im-portant considerations regarding model inputs and limita-tions. Hygrothermal simulation...

  20. Passive hygrothermal control of a museum storage building in Vejle

    DEFF Research Database (Denmark)

    Christensen, Jørgen Erik; Janssen, Hans

    2010-01-01

    and maintenance costs are currently motivating a paradigm change toward passive control. Passive control, via the thermal and hygric inertia of the building, is gaining a foothold in the museum conservation and building physical community. In this report we document the hygrothermal performance optimisation......For optimal conservation of the stored objects, museum storage buildings require a very stable interior climate, with only minimal and slow variations in temperature and relative humidity. Often extensive HVAC is installed to provide such stable indoor conditions. The resultantly significant energy...... of a museum storage building, related to an existing storage centre in Vejle (Denmark). The current building design already incorporates passive control concepts: thermal inertia is provided by the thick walls, the ground floor and its underlying soil volume, while hygric inertia is provided by the thick...

  1. Building America Case Study: Cold Climate Foundation Wall Hygrothermal Research Facility, Cloquet, Minnesota (Fact Sheet)

    Energy Technology Data Exchange (ETDEWEB)

    NorthernSTAR

    2014-09-01

    This report focuses on the progress made to date and the technical details of the experiment. An overview of the experimental data being collected with some interesting highlights noted thus far is also provided. A full analysis of the experimental data and the drawing of conclusions with regard to the thermal and hygrothermal performance of the retrofit foundation insulation systems tested will only be possible after a full year of data has been collected in 2014.

  2. Chapel of cemetery church of all saints in Sedlec - Long-term analysis of hygrothermal conditions

    Science.gov (United States)

    Pavlík, Zbyšek; Balík, Lukáš; Kudrnáčová, Lucie; Maděra, Jiří; Černý, Robert

    2017-07-01

    In this paper, long-term monitoring of hygrothermal conditions of the chapel of the cemetery church of All Saints in Sedlec, Czech Republic is presented as a practical tool for evaluation of functional problems of the researched structure. Within the performed experimental tests, interior and exterior climatic conditions were monitored over one year period. Herewith, surface temperature of the chapel wall was measured. Exterior climatic data were collected using weather station Vantage Pro2 placed in church tower. In interior, precise combined relative humidity/temperature sensors were installed. Based on the accessed hygrothermal state of the inspected chapel and identified periods of possible surface condensation, service conditions of the chapel will be optimized in order to prevent extensive damage of historically valuable finishing and furnishing materials, paintings, plasters, and architectural ornaments.

  3. Chapter 8: Whole-Building Retrofit with Consumption Data Analysis Evaluation Protocol. The Uniform Methods Project: Methods for Determining Energy Efficiency Savings for Specific Measures

    Energy Technology Data Exchange (ETDEWEB)

    Kurnik, Charles W. [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Agnew, Ken [DNV GL, Madison, WI (United States); Goldberg, Mimi [DNV GL, Madison, WI (United States)

    2017-11-01

    Whole-building retrofits involve the installation of multiple measures. Whole-building retrofit programs take many forms. With a focus on overall building performance, these programs usually begin with an energy audit to identify cost-effective energy efficiency measures for the home. Measures are then installed, either at no cost to the homeowner or partially paid for by rebates and/or financing. The methods described here may also be applied to evaluation of single-measure retrofit programs. Related methods exist for replace-on-failure programs and for new construction, but are not the subject of this chapter.

  4. Hygrothermal Properties of Cross Laminated Timber and Moisture Response of Wood at High Relative Humidity

    Science.gov (United States)

    AlSayegh, George

    Cross Laminated Timber (CLT) is a new wood-based material composed of cross laminated wood boards that form a structural panel. This study focuses on identifying the appropriate methods to determine the hygrothermal properties of CLTs fabricated with Canadian and European Lumber. The laboratory tests carried out in this study will help establish heat, air and moisture response properties to be used for hygrothermal simulation to assess the durability of CLTs in building envelope construction. Measurement of water vapour permeability, liquid water absorption, sorption isotherms, thermal conductivity, and air permeability were performed on three Canadian CLT specimens composed of Hem-Fir, Eastern Spruce-Pine-Fir, and Western Spruce-Pine-Fir and one European specimen composed of Spruce. The hygrothermal properties of CLT, considered in this study, appear to be similar to commonly used wood specimens reported in the literature. However, liquid water absorption coefficients of CLT were found to be generally lower than common wood species, possibly due to the presence of glue between the wood layers which limits the moisture movement across the specimen. On the other hand, the air permeability across the CLT specimens varied due to the glue discontinuity within the specimen which led some CLTs to be permeable, however all the European specimens were found to be impermeable. This study also critically analyzed the significance of equilibrium moisture content (EMC) of wood at high relative humidity, measured by means of a pressure plate apparatus and humidity chambers, on the moisture management performance of a wood-frame stucco wall, using the hygrothermal simulation tool hygIRC-2D. The simulation results indicate that the prediction of the moisture response of a wood-frame stucco wall assembly depends significantly on the method adopted to derive the EMC of wood at high RH.

  5. Hygrothermal optimisation of museum storage spaces

    DEFF Research Database (Denmark)

    Janssen, Hans; Christensen, Jørgen Erik

    2013-01-01

    . Auxiliary dehumidification is thus required to provide good conservation conditions, and it is secondly investigated how the dehumidification load can be diminished. The study reveals the crucial impact of air tightness, while thermal insulation only has a minor influence.To further reduce the economic......-hygrothermal-resistance envelope is to satisfactorily stabilise that interior climate, with no need for mechanical air conditioning hence.This paper first studies the reliability of full passive conditioning for museum storage spaces. It is shown to be an illusion, since it usually results in excessive interior humidities...... and ecologic cost of conditioning, the paper finally assesses “concentrated dehumidification”: dehumidification during a part of the day only, while leaving the humidity free-running during the rest of the day. It is established that the hygric inertia of the interior air, building walls and stored objects...

  6. Hygrothermal Numerical Simulation Tools Applied to Building Physics

    CERN Document Server

    Delgado, João M P Q; Ramos, Nuno M M; Freitas, Vasco Peixoto

    2013-01-01

    This book presents a critical review on the development and application of hygrothermal analysis methods to simulate the coupled transport processes of Heat, Air, and Moisture (HAM) transfer for one or multidimensional cases. During the past few decades there has been relevant development in this field of study and an increase in the professional use of tools that simulate some of the physical phenomena that are involved in Heat, Air and Moisture conditions in building components or elements. Although there is a significant amount of hygrothermal models referred in the literature, the vast majority of them are not easily available to the public outside the institutions where they were developed, which restricts the analysis of this book to only 14 hygrothermal modelling tools. The special features of this book are (a) a state-of-the-art of numerical simulation tools applied to building physics, (b) the boundary conditions importance, (c) the material properties, namely, experimental methods for the measuremen...

  7. Development of a methodology for defining whole-building energy design targets for commercial buildings: Phase 2, Development Concept Stage Report

    Energy Technology Data Exchange (ETDEWEB)

    McKay, H.N. (Illuminating Engineering Society of North America, New York, NY (USA)); Deringer, J.J. (American Inst. of Architects, Washington, DC (USA)); Jones, J.W. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA (USA)); Hall, J.D. (Deringer Group, Riva, MD (USA))

    1990-09-01

    This report documents eight tasks performed as part of the Whole-Building Energy Design Targets project, in which detailed conceptual approaches were produced for each element of the proposed Targets model. The eight task reports together describe the important modules proposed for inclusion in the Targets model: input module, energy module, characteristic development moduel, building cost module, analysis control module, energy cost module, search routines module, and economic analysis module. 16 refs., 16 figs., 5 tabs.

  8. Experimental Study of the Hygrothermal Effect on Wear Behavior of Composite Materials

    OpenAIRE

    Fadhel Abbas. Abdulla; Katea L. Hamid

    2017-01-01

    The hygrothermal effect on the wear behavior of composite material (fiberglass and polyester resin vf=40%) was investigated experimentally in this work. The study includes manufacturing of test device (pin on disc) according to ASTM G 99. In order to study the hygrothermal effect on wear behavior of composite materials the hygrothermal chamber was manufactured. The experimental results show that the wear of glass fiber/polyester increased with increasing the load, sliding speed and sliding di...

  9. Experimental investigation of rockwool insulation hygrothermal properties related to material structure

    National Research Council Canada - National Science Library

    Đurović-Petrović Maja D

    2015-01-01

    The hygrothermal properties related to rockwool insulation material structure with different additives are presented using rockwool insulation products obtained from row material of southern Serbia (Vranje region...

  10. Characterization of fracture toughness of epoxy resin after hygrothermal aging

    KAUST Repository

    Quispe, Gustavo Q.

    2013-07-01

    Characterization of fracture toughness of epoxy resin after hygrothermal ageing Gustavo Quino Quispe The aim of this work is to characterize the e ects of hygrothermal aging in the plain strain fracture toughness of the epoxy system composed by cycloaliphatic epoxy resin and diglycidyl ether of bisphenol-A (DGEBA). For this, after having been under hygrothermal aging in a climatic chamber, epoxy samples were studied using ASTM D5045 fracture toughness test, and micrography and roughness measurements of the fracture surface. It is reported a rapid decrease of GIc and KIc during the rst 2 days. Moreover, a numerical model [13] was used to simulate and see with more detail the water absorption in the aged samples. From that, it was observed the heterogeneous distribution of water. Accordingly, it was proposed that the results should be correlated with the water content at the vicinity of the crack tip. Consequently, it was possible to obtain, by quasi-static simulations, the ideal load-displacement curves of crack propagation in the heterogeneous samples. Finally, another contribution of this work is the study of the fracture surface, that gives a clue of the relationship among the fracture energy, the appearance of microcracks in the fracture surface, and the roughness (Ra).

  11. Experimental Study of the Hygrothermal Effect on Wear Behavior of Composite Materials

    Directory of Open Access Journals (Sweden)

    Fadhel Abbas. Abdulla

    2017-07-01

    Full Text Available The hygrothermal effect on the wear behavior of composite material (fiberglass and polyester resin vf=40% was investigated experimentally in this work. The study includes manufacturing of test device (pin on disc according to ASTM G 99. In order to study the hygrothermal effect on wear behavior of composite materials the hygrothermal chamber was manufactured. The experimental results show that the wear of glass fiber/polyester increased with increasing the load, sliding speed and sliding distance. The load and sliding distance were more effective on the wear of the composite rather than sliding speed. Also, it has been revealed that, the hygrothermal is considerable effect that, the wear rate of glass fiber/polyester without hygrothermal effect is lower than wear with hygrothermal effect. Applied load is the wear factor that has the highest physical influence on the wear of composites materials than other wear factors. Also, the wear of glass fiber/polyester without hygrothermal effect is lower than wear with hygrothermal effect.

  12. Development of a methodology for defining whole-building energy design targets for commercial buildings: Phase 2, Development concept stage report

    Energy Technology Data Exchange (ETDEWEB)

    Jones, J.W. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA (USA)); Deringer, J.J. (Deringer Group, Riva, MD (USA)); Hall, J.D. (American Inst. of Architects, Washington, DC (USA)) (comps.)

    1990-09-01

    The Whole-Building Energy Design Targets project is being conducted for the US Department of Energy (DOE) by the Pacific Northwest Laboratory (PNL). The objective of the project is to develop a flexible methodology for setting energy performance guidelines with which architects, engineers, planners, and owners can assess energy efficiency in commercial building design. This volume, the third in the four-volume report on the Targets project concept stage, contains the minutes of the workshops as well as summaries of the expert's written comments prepared at the close of each workshop. In Section 2, the building energy simulation workshop is summarized. Section 3 provides a summary of the building cost workshop.

  13. Demonstration of the Whole-Building Diagnostician in a Single-Building Operator Environment

    Energy Technology Data Exchange (ETDEWEB)

    Katipamula, Srinivas; Bauman, Nathan N.; Pratt, Robert G.; Brambley, Michael R.

    2003-03-31

    This report on documents the results of the single-building-operator, on-line, demonstration of the Whole-Building Diagnostician, conducted at the Symphony Towers building in San Diego, California. The on-line test was designed to evaluate the Outdoor-Air Economizer (OAE) diagnostic module’s capabilities to automatically and continually diagnose operational problems with air-handling units (AHUs). As part of this demonstration, all four AHUs at Symphony Towers were monitored. The measured data that were collected on a continuous basis included: 1) outdoor-air temperature, 2) return-air temperature, 3) mixed-air temperature, 4) supply-air temperature, 5) chilled-water valve position, 6) supply-fan status, 7) outdoor-air relative humidity, and 8) return-air relative humidity.

  14. HAM-Tools – a whole building simulation tool in Annex 41

    DEFF Research Database (Denmark)

    2008-01-01

    HAM-Tools is a building simulation software. The main task of this tool is to simulate transfer processes related to building physics, i.e. heat, air and moisture transport in buildings and building components in operating conditions. The scope of the ECBCS Annex 41 “Whole Building Heat, Air...... and Moisture Response” was of a high relevance for the testing, development, validation and promotion of the HAM-Tools. The majority of the numerical studies made by this programme were provided for Subtask 1 “Modelling principles and common exercises”. This paper gives an overview of the modelling...... capabilities of HAM-Tools and some results provided for Subtask 1....

  15. Development of whole-building energy design targets for commercial buildings: Phase 1, Planning: Volume 2, Technical report

    Energy Technology Data Exchange (ETDEWEB)

    Crawley, D.B.; Briggs, R.S.; Jones, J.W.; Seaton, W.W.; Kaufman, J.E.; Deringer, J.J.; Kennett, E.W.

    1987-08-01

    This is the second volume of the Phase 1 report and discusses the 10 tasks performed in Phase 1. The objective of this research is to develop a methodology for setting energy design targets to provide voluntary guidelines for the buildings industry. The whole-building energy targets project is being conducted at the Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE) to encourage the construction of energy-efficient buildings by informing designers and owners about cost-effective goals for energy use in new commercial buildings. The outcome of this research will be a flexible methodology for setting such targets. The tasks are listed and discussed in this report as follows: Task 1 - Develop Detailed Project Goals and Objectives; Task 2 - Establish Buildings-Industry Liaison; Task 3 - Develop Approaches to the Energy Targets Model, Building Operations, and Climate; Task 4 - Develop an Approach for Treating Economic Considerations; Task 5 - Develop an Approach for Treating Energy Sources; Task 6 - Collect Energy-Use Data; Task 7 - Survey Energy Expert Opinion; Task 8 - Evaluation Procedure Specification and Integration; Task 9 - Phase 1 Report Development; and Task 10 - Phase 1 Review Planning.

  16. Tools for Performance Simulation of Heat, Air and Moisture Conditions of Whole Buildings

    DEFF Research Database (Denmark)

    Woloszyn, Monika; Rode, Carsten

    2008-01-01

    Humidity of indoor air is an important factor influencing the air quality and energy consumption of buildings as well as durability of building components. Indoor humidity depends on several factors, such as moisture sources, air change, sorption in materials and possible condensation. Since all...

  17. Evaluation of Moisture Buffer Effects by Performing Whole-Building Simulations

    DEFF Research Database (Denmark)

    Rode, Carsten; Mendes, Nathan; K., Grau

    2004-01-01

    The humidity of rooms and the moisture conditions of materials in the enclosure of buildings depend much on each other because of the moisture exchange that takes place over the interior surfaces. These moisture influences also depend strongly on the thermal conditions of indoor spaces and enclos...

  18. Comparative study of hygrothermal properties of five thermal insulation materials

    Directory of Open Access Journals (Sweden)

    Laure Ducoulombier

    2017-09-01

    Full Text Available The objective of this article is to carry out a comparative study of the main hygrothermal properties of five thermal insulation materials for buildings. These properties are necessary for a correct prediction of heat and moisture transfers through the walls and the selection of the most appropriate materials according to the specific buildings. The studied materials were glass wool, rock wool, expanded polystyrene, wood fiberboard and polyester fiberfill. The article is divided into three parts. The first part presents the phenomena of hygrothermal transfers in walls in order to understand the need for determining specific properties of the insulating materials. The second part describes in details the five studied insulating materials and the methods used for the characterization and identification of their main properties. Finally, the last part presents the experimental results and makes comparisons between materials. The differences between the insulating materials are brought out, such as the strong dependence of the thermal conductivity of polystyrene on temperature, or the good permeability of fibrous insulating materials to water vapor. A detailed analysis of the obtained results is presented.

  19. Building Information Management as a Tool for Managing Knowledge throughout whole Building Life Cycle

    Science.gov (United States)

    Nývlt, Vladimír; Prušková, Kristýna

    2017-10-01

    BIM today is much more than drafting in 3D only, and project participants are further challenging, what is the topic of both this paper, and further research. Knowledge of objects, their behaviour, and other characteristics has high impact on whole building life cycle. Other structured and unstructured knowledge is rightfully added (e.g. historically based experience, needs and requirements of users, investors, needs for project and objects revisions) Grasping of all attributes into system for collection, managing and time control of knowledge. Further important findings lie in the necessity of understanding how to manage knowledge needs with diverse and variable ways, when BIM maturity levels are advanced, as defined by Bew and Richards (2008). All decisions made would always rely on good, timely, and correct data. Usage of BIM models in terms of Building Information Management can support all decisions through data gathering, sharing, and using across all disciplines and all Life Cycle steps. It particularly significantly improves possibilities and level of life cycle costing. Experience and knowledge stored in data models of BIM, describing user requirements, best practices derived from other projects and/or research outputs will help to understand sustainability in its complexity and wholeness.

  20. Experimental Study on Bond Behavior of FRP-Concrete Interface in Hygrothermal Environment

    Directory of Open Access Journals (Sweden)

    X. H. Zheng

    2016-01-01

    Full Text Available As the technique of fiber-reinforced polymer (FRP composite material strengthened reinforced concrete structures is widely used in the field of civil engineering, durability of the strengthened structures has attracted more attention in recent years. Hygrothermal environment has an adverse effect on the bond behavior of the interface between FRP and concrete. This paper focuses on the bond durability of carbon fiber laminate- (CFL- concrete interface in hygrothermal condition which simulates the climate characteristic in South China. Twenty 100 mm × 100 mm × 720 mm specimens were divided into 6 groups based on different temperature and humidity. After pretreatment in hygrothermal environment, the specimens were tested using double shear method. Strain gauges bonded along the CFL surface and linear variation displacement transducers (LVDTs were used to measure longitudinal strains and slip of the interface. Failure mode, ultimate capacity, load-deflection relationship, and relative slip were analyzed. The bond behavior of FRP-concrete interface under hygrothermal environment was studied. Results show that the ultimate bearing capacity of the interface reduced after exposure to hygrothermal environments. The decreasing ranges were up to 27.9% after exposure at high temperature and humidity (60°C, 95% RH. The maximum strains (εmax of the specimens pretreated decreased obviously which indicated decay of the bond behavior after exposure to the hygrothermal environment.

  1. Experimental investigation of cyclic hygrothermal aging of hybrid composite

    KAUST Repository

    El Yagoubi, Jalal

    2013-04-05

    This work provides an experimental investigation of the cyclic hygrothermal aging of a hybrid composites. We aimed to propose a general framework in the view to further optimize polymer-based composites. It reports experimental data and relevant observations collected during an aging campaign (up to 2000 cycles) where anhydride-cured epoxy samples as well as composites samples are exposed to environmental conditions. The data gathered during the whole campaign reveals that (1) the polymer displays a non-classical sorption behavior (2) the volume change is correlated to the mass uptake (3) the elastic modulus is correlated to the glass transition temperature. Matrix and interface degradation of the hybrid composite is monitored by means of microstructural observations. © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

  2. MODELLING THE PROCESSES OF HYGROTHERMAL MECHANICS IN RICE DRYING

    Directory of Open Access Journals (Sweden)

    S. A. Podgornyi

    2015-01-01

    Full Text Available Grain-crops are justly considered to be the staple food in Russia as well as all over the world. The specific feature is that postharvest processing of the grain and, above all, drying is an essential stage of providing products of high quality in the sufficient amount. The changes of the technological parameters of the drying process which take place over time, have a significant practical value in terms of monitoring the process and defining the modes providing the quality of the product as well as calculating energy demands necessary to carry out this process. Hereof, the quality of the product received is defined by minimum crack formation of rice grain after the process. The aim of the work is to get a mathematical model of hygrothermal mechanics of rice drying. On the basis of A.V. Lykov’s system of differential equations which describe the changes in moisture content, temperature and pressure, transition to the system of ordinary differential equations was offered which is based on drawing up balance of mass and heat during the process of drying. This approach does not consider the properties of moisture content and temperature within the material but takes into account their mean value. Using a simplified model of hygrothermal mechanics of rice drying that we have got enabled us to reproduce the process of drying in the conditions of minimum crack formation within the studied range (the temperature of the drying agent from 50 to 70 °C, speed from 2.3 to 2.8 м/sеk. The dependences we have got enable us to predict the quality of rice grain during drying.

  3. Study on the Effect of Combined Nanosilver- Hygrothermal Treatments on Wood Properties

    Directory of Open Access Journals (Sweden)

    Ghonche Rassam

    2014-05-01

    Full Text Available In this research, the combined effect of impregnation of wood with nanosilver solution and hygrothermal treatment on some physical and mechanical properties of beech (Fagus orientalis Lipskey and spruce (Piceaabies woods was studied. Wood specimens, Initially, were impregnated in an impregnation cylinder for 20 minutes at the pressure of 0.25 MPa, with nanosilver solution. Then, hygrothermal treatment was carried out at the temperatures of 120, 150 and 180°C for 1, 3 and 5 hours. Control specimens, without any impregnation process, were hygrothermally treated. Volumetric Swelling after 2 and 24 hours soaking in water, bending strength, impact load resistance and compressive strength parallel to the grain of specimens were measured, according to ASTM D143 and all data were analyzed statistically. The results showed that swelling and mechanical properties were decreased by increasing the temperature and duration of hygrothermal treatment. Also, nanosilver impregnated specimens which were treated at 180 ˚C had lower swelling without Not clear and not seems. Consequently or it can be concluded that with nanosilver impregnation process of wood, hygrothermal treatment would be carried out at higher temperature (180 ˚C to obtain better dimensional stability with no more decrease in mechanical properties.

  4. Laminated Thin Shell Structures Subjected to Free Vibration in a Hygrothermal Environment

    Science.gov (United States)

    Gotsis, Pascal K.; Guptill, James D.

    1994-01-01

    Parametric studies were performed to assess the effects of various parameters on the free-vibration behavior (natural frequencies) of (+/- theta)(sub 2) angle-ply, fiber composite, thin shell structures in a hygrothermal environment. Knowledge of the natural frequencies of structures is important in considering their response to various kinds of excitation, especially when structures and force systems are complex and when excitations are not periodic. The three dimensional, finite element structural analysis computer code CSTEM was used in the Cray YMP computer environment. The fiber composite shell was assumed to be cylindrical and made from T300 graphite fibers embedded in an intermediate-modulus, high-strength matrix. The following parameters were investigated: the length and the laminate thickness of the shell, the fiber orientation, the fiber volume fraction, the temperature profile through the thickness of the laminate, and laminates with different ply thicknesses. The results indicate that the fiber orientation and the length of the laminated shell had significant effects on the natural frequencies. The fiber volume fraction, the laminate thickness, and the temperature profile through the shell thickness had weak effects on the natural frequencies. Finally, the laminates with different ply thicknesses had an insignificant influence on the behavior of the vibrated laminated shell. Also, a single through-the-thickness, eight-node, three dimensional composite finite element analysis appears to be sufficient for investigating the free-vibration behavior of thin, composite, angle-ply shell structures.

  5. Hygrothermal Analysis of Indoor Environment of Residential Prefabricated Buildings

    Science.gov (United States)

    Kraus, Michal

    2017-10-01

    Recent studies show that the relative humidity and the indoor air temperature constitute an important determinant of the quality of indoor air. Hygrothermal microclimate has a significant impact on occupant’s health and their comfort. The study presents the results of experimental measurement of indoor air temperature and relative humidity in selected apartment in prefabricated panel house situated in Ostrava, Czechia. The contribution describes and analysis the relation between indoor air temperature [°C] and relative humidity [%] in this apartment. The experimental object is selected with respect to the housing stock in the Czech Republic. A third of the housing stock in the Czech Republic is composed of prefabricated panel houses. Regeneration and revitalization of these buildings were in the focus of interest during recent years. Building modifications, such as thermal insulation of building envelope or window replacement, lead to a significantly higher level of airtightness of these objects. Humidity and indoor air temperature are measured in 10-minute cycles for two periods. The values of temperature and humidity are measured for the non-heating and the heating season. The length of each experimental period is 30 days. The mean value of indoor air temperature is 22.21 °C and average relative humidity is 45.87% in the non-heating period. The values of 22.62 °C and 35.20% represent average values for the heating period. A slight increase of the average temperature of the indoor environment (+1.85%) is observed. The decrease of the relative humidity is evident at first glance. The relative humidity of the internal environment is approximately 10% lower in the heating period. Long-term decline of relative humidity below 30% brings many problems. It is necessary to take measures to increase of relative humidity in residential prefabricated building. The aquarium appears to be ineffective. The solution may be forced artificial ventilation or humidifiers.

  6. A multiscale and multiphysics numerical framework for modelling of hygrothermal ageing in laminated composites

    NARCIS (Netherlands)

    Barcelos Carneiro M Rocha, Iuri; van der Meer, F.P.; Nijssen, RPL; Sluijs, Bert

    2017-01-01

    In this work, a numerical framework for modelling of hygrothermal ageing in laminated composites is proposed. The model consists of a macroscopic diffusion analysis based on Fick's second law coupled with a multiscale FE2 stress analysis in order to take microscopic degradation

  7. Development of a methodology for defining whole-building energy design targets for commercial buildings: Phase 2, Development concept stage report

    Energy Technology Data Exchange (ETDEWEB)

    Jones, J.W. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA (USA)); Deringer, J.J. (American Inst. of Architects, Washington, DC (USA)); McKay, H.N. (Illuminating Engineering Society of North America, New York, NY (USA))

    1990-09-01

    Since 1985, the Pacific Northwest Laboratory (PNL) has managed the Whole-Building Energy Design Targets project for the US Department of Energy (DOE) Office of Building Technologies (formerly the Office of Buildings and Community Systems). The primary focus of the Targets project is to develop a flexible methodology for buildings industry use in setting energy performance guidelines for commercial buildings and for determining compliance with those guidelines. The project is being conducted as a two-phase effort. In Phase 1, Planning, the project team determined the research that was necessary for developing the Targets methodology. In the concept stage of Phase 2, Development, the team sought to define the technical and software development concepts upon which the overall Targets methodology will be based. The concept stage work is documented in four volumes, of which this summary volume is the first. The three other volumes are Volume 2: Technical Concept Development Task Reports, Volume 3: Workshop Summaries, and Volume 4: Software Concept Development Task Reports. 8 refs., 14 figs.

  8. The Effects of Steel Fibre on the Mechanical Strength and Durability of Steel Fibre Reinforced High Strength Concrete (SFRHSC Subjected to Normal and Hygrothermal Curing

    Directory of Open Access Journals (Sweden)

    Velayutham G.

    2014-03-01

    Full Text Available This paper presents the experimental investigation into the mechanical strength and durability of steel fibre high strength concrete (SFHSC. In the experimental investigation, the properties of the steel fibre high strength concrete were assessed through two types of curing regimes, the normal water curing and the hygrothermal curing treatment, with the results of the tests being taken at 7 days and 7 days + 24 hours. The steel fibres were added at volume fractions of 0.5%, 1.0%, 1.5%, 2.0% and 3.0%. The tests that were performed for the mechanical strength and durability were the compressive and flexural strength test, the modulus of elasticity test, the ultrasonic pulse velocity test, the water absorption test, the air permeability test and the porosity test. The compressive and flexural strength of the steel fibre high strength concrete reached their maximum of 70.7 MPa and 11.45 MPa, respectively during normal curing for the 3.0% volume fraction of steel fibre. The experimental results of this study indicate that the inclusion of steel fibres enhances the mechanical strength of high strength concrete cured in normal water curing as compared to the hygrothermal curing treatment.

  9. Evaluation of the Predictive Accuracy of Five Whole Building Baseline Models

    Energy Technology Data Exchange (ETDEWEB)

    Granderson, Jessica [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Price, Phillip [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2012-08-31

    This report documents the relative and absolute performance of five baseline models used to characterize whole­building energy consumption. The Pulse Adaptive Model1, multi-­parameter change-­point, mean-week, day-­time-emperature, and LBNL models were evaluated according to a number of statistical ‘goodness of fit’ metrics, to determine their accuracy in characterizing the energy consumption of a set of 29 buildings. The baseline training period, prediction horizon, and predicted energy quantity (daily, weekly, and monthly energy consumption) were varied, and model predictions were compared to interval meter data to determine the accuracy of each model. Three combinations of baseline training periods and prediction horizons were considered: 6 months of training to generate a 12-­month prediction; 9 months of training to generate a 7-month prediction; and 12 months of training to generate a 6- month prediction.

  10. Whole-Building Airflow Network Characterization by a Many-Pressure-States (MPS) Technique

    Energy Technology Data Exchange (ETDEWEB)

    Armstrong, Peter R.; Hadley, Donald L.; Stenner, Robert D.; Janus, Michael C.

    2001-06-01

    Applications of multi-zone airflow and contaminant dispersion models to specific buildings include air quality diagnosis, weatherization, smoke control, and pressure balancing for lab-hood safety. Research applications may involve energy and air quality impacts of infiltration, ventilation, and development of associated standards. The benefits of these applications are not being fully realized because of uncertainties in model inputs. An economical test method that is as accurate but less intrusive and faster than incremental or component-by-component blower door testing is needed. Existing methods of measuring inter-zone flows by tracers and flow-pressure network parameters by pressurization tests are reviewed. A method based on simultaneous measurement of all zone pressures within a given control volume and flow measurements on a few selected inter-zonal paths is presented. Flow rates at a subset of flow measuring locations are controlled during testing to take on two or more values. Constrained, nonlinear least squares analysis produces the power law parameters (flow coefficient and exponent) for each set of two-port aggregate flow paths within the topology. Testing cost and effort are reduced by relying mainly on zone pressure measurements and a rich set of HVAC- or blower-door-induced flow-pressure excitation states with relatively few flow measuring stationsements. Results of applying the method to a two-story test building are reported. Potential application to fault detection, acceptance testing, continuous commissioning, smoke dispersion and other problems of building performance and operation are outlined.

  11. Comparing Whole Building Energy Implications of Sidelighting Systems with Alternate Manual Blind Control Algorithms

    Directory of Open Access Journals (Sweden)

    Christopher Dyke

    2015-05-01

    Full Text Available Currently, there is no manual blind control guideline used consistently throughout the energy modeling community. This paper identifies and compares five manual blind control algorithms with unique control patterns and reports blind occlusion, rate of change data, and annual building energy consumption. The blind control schemes detailed here represent five reasonable candidates for use in lighting and energy simulation based on difference driving factors. This study was performed on a medium-sized office building using EnergyPlus with the internal daylight harvesting engine. Results show that applying manual blind control algorithms affects the total annual consumption of the building by as much as 12.5% and 11.5% for interior and exterior blinds respectively, compared to the Always Retracted blinds algorithm. Peak demand was also compared showing blind algorithms affected zone load sizing by as much as 9.8%. The alternate algorithms were tested for their impact on American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE Guideline 14 calibration metrics and all models were found to differ from the original calibrated baseline by more than the recommended ±15% for coefficient of variance of the mean square error (CVRMSE and ±5% for normalized mean bias error (NMBE. The paper recommends that energy modelers use one or more manual blind control algorithms during design stages when making decisions about energy efficiency and other design alternatives.

  12. Experimental investigation of rockwool insulation hygrothermal properties related to material structure

    Directory of Open Access Journals (Sweden)

    Đurović-Petrović Maja D.

    2015-01-01

    Full Text Available The hygrothermal properties related to rockwool insulation material structure with different additives are presented using rockwool insulation products obtained from row material of southern Serbia (Vranje region in the wide range of reference temperatures (10ºC to 70ºC. The hygrothermal properties of basic sample (without additives are compared to two samples with different additives for two sets of rockwool insulation samples namely: light-soft-panels (LSP with density of 50 kg/m3, and middle-weight-panels (MWP with density of 80 kg/m3. It is shown that there is significant (approximately 10% improvement of thermal conductivity for additives based on zeolite. Also, correlation of thermal conductivity and sorption properties of selected samples are presented.

  13. Effects of Hygrothermal Cycling on the Chemical, Thermal, and Mechanical Properties of 862/W Epoxy Resin

    Science.gov (United States)

    Miller, Sandi G.; Roberts, Gary D.; Copa, Christine C.; Bail, Justin L.; Kohlman, Lee W.; Binienda, Wieslaw K.

    2011-01-01

    The hygrothermal aging characteristics of an epoxy resin were characterized over 1 year, which included 908 temperature and humidity cycles. The epoxy resin quickly showed evidence of aging through color change and increased brittleness. The influence of aging on the material s glass transition temperature (Tg) was evaluated by Differential Scanning Calorimetry (DSC) and Dynamic Mechanical Analysis (DMA). The Tg remained relatively constant throughout the year long cyclic aging profile. The chemical composition was monitored by Fourier Transform Infrared Spectroscopy (FTIR) where evidence of chemical aging and advancement of cure was noted. The tensile strength of the resin was tested as it aged. This property was severely affected by the aging process in the form of reduced ductility and embrittlement. Detailed chemical evaluation suggests many aging mechanisms are taking place during exposure to hygrothermal conditions. This paper details the influence of processes such as: advancement of cure, chemical degradation, and physical aging on the chemical and physical properties of the epoxy resin.

  14. ANALYSIS OF HYGROTHERMAL CONDITIONS OF EXTERNAL PARTITIONS IN AN UNDERGROUND FRUIT STORE

    Directory of Open Access Journals (Sweden)

    Grzegorz Nawalany

    2016-09-01

    Full Text Available The paper presents the analysis of hygrothermal conditions of external partitions in an underground fruit store. The results of measurements of temperature and humidity of the indoor and outdoor air as well as the surface surrounding temperature and the temperature of the air surrounding the store constituted the boundary conditions for the hygrothermal calculations. The paper presents the calculation of the distribution of the temperature and humidity on the ground floor, the wall contacting the ground, the wall contacting the outside air, and the ceiling above the storage chamber. The heat and moisture calculations have shown high risk of condensation submerged in non-insulated external walls. The condition of the adaptation of a traditional cold store to a simple and atmosphere controlled cold one is to increase the thermal resistance of the partitions. Such a solution will let cut the energy demand in those types of agricultural buildings.

  15. Implementation of window shading models into dynamic whole-building simulation

    Science.gov (United States)

    Lomanowski, Bartosz Aleksander

    An important consideration in energy efficient building design is the management of solar gain, as it is the largest and most variable gain in a building. The design of buildings with highly glazed facades, as well as decreased energy transfer rates through better insulated and tighter envelopes are causing interior spaces to become highly sensitive to solar gain. Shading devices such as operable slat-type louver blinds are very effective in controlling solar gain, yet their impact on peak cooing loads and annual energy consumption is poorly understood. With the ever-increasing role of building energy simulation tools in the design of energy efficient buildings, there is a clear need to model windows with shading devices to assess their impact on building performance. Recent efforts at the University of Waterloo's Advanced Glazing Systems Laboratory (AGSL) in window shading research have produced a set of flexible shading models. These models were developed with emphasis on generality and computational efficiency, ideally suited for integration into building simulation. The objective of the current research is to develop a complex fenestration facility within a general purpose integrated building simulation software tool, ESP-r, using the AGSL shading models. The strategy for implementation of the AGSL shading models is the addition of a new multi-layer construction within ESP-r, the Complex Fenestration Construction (CFC). The CFC is based on the standard ESP-r multi-layer nodal structure and finite control volume numerical model, with additional measures for coping with the complexities that arise in the solar, convective and radiant exchanges between glazing/shading layers, the interior zone and exterior surroundings. The CFC algorithms process the solar, convective and radiant properties of the glazing/shading system at each time-step, making it possible to add control (e.g., changing the slat angle of a slat-type blind) at the time-step level. Thermal

  16. Technology Solutions Case Study: Cold Climate Foundation Wall Hygrothermal Research Facility, Cloquet, Minnesota

    Energy Technology Data Exchange (ETDEWEB)

    None

    2014-09-01

    This case study describes the University of Minnesota’s Cloquet Residential Research Facility (CRRF) in northern Minnesota, which features more than 2,500 ft2 of below-grade space for building systems foundation hygrothermal research. Here, the NorthernSTAR Building America Partnership team researches ways to improve the energy efficiency of the building envelope, including wall assemblies, basements, roofs, insulation, and air leakage.

  17. Comparison Study on Interlaminar Shear Strength Testing Methods of CFRP under Hygrothermal Aging Conditions

    Directory of Open Access Journals (Sweden)

    SHUANG Chao

    2017-10-01

    Full Text Available The effects of hygrothermal aging on the interlaminar shear strength of T700/TDE-85 composites were studied by short-beam method and double-incision method. The relationship between moisture absorption and aging time was discussed, and the fracture surface morphology was analyzed. The experimental results show that the moisture absorption law of the two specimens is in accordance with Fickle's second law, but the saturated moisture absorption rate and moisture absorption time are different. The moisture absorption rates and saturated moisture absorption rates of the specimens of double incision method are higher than those of the short beam method. The interlaminar strength of double-incision test is more obvious than that of short-beam under hygrothermal aging conditions, the interlaminar shear strength retention rates of short-beam method's specimens are 74.5%, 61.0%, 53.2% and 50.6% at 500 h intervals and the interlaminar shear strength retention rates of double-incision method's specimens are 60.9%, 38.3%, 42.6% and 33.0% at 500 h intervals. The failure mode of short-beam specimen is more complicated than that of double-incision with the increase of hygrothermal aging time.

  18. Linear hygrothermal viscoelastic characterization of Nafion NRE 211 proton exchange membrane

    Energy Technology Data Exchange (ETDEWEB)

    Patankar, K.A. [Macromolecular Science and Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA (United States); Dillard, D.A.; Case, S.W. [Engineering Science and Mechanics Department, Virginia Polytechnic Institute and State University, Blacksburg, VA (United States); Ellis, M.W. [Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA (United States); Lai, Y.H.; Gittleman, C.S. [Fuel Cell Research Laboratory, General Motors Corporation, Honeoye Falls, NY (United States)

    2012-10-15

    The tensile relaxation modulus of a commercially available proton exchange membrane, Nafion registered NRE 211, was obtained over a range of humidity levels and temperatures using a commercial dynamic mechanical analyzer (DMA). Hygral stress relaxation master curves were first constructed, followed by a hygrothermal master curve using the time temperature moisture superposition principle. The hygrothermal master curve was fitted using a 10-term Prony series and validated using longer term stress relaxation tests. To validate the results from the stress relaxation experiments, short and long-term creep compliance was converted into stress relaxation modulus using a well-known viscoelastic conversion formula, and compared with the relaxation modulus obtained under identical conditions. Good agreement was found between the two datasets. It was evident that relaxation data at 2% RH at the test temperatures was not superposable with the master curves obtained at higher relative humidity (10% < RH < 90%) at the temperature range 70 C < T < 90 C. It was observed that the longer term relaxation modulus under humid conditions matched well with the hygrothermal master curve; however, the longer term relaxation modulus under dry conditions was significantly higher than the relaxation master curve obtained under dry conditions, raising the possibility of a physical aging process in the ionomer and/or irreversible morphological changes in the membrane under dry conditions. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  19. Experimental Study on the Hygrothermal Behavior of a Coated Sprayed Hemp Concrete Wall

    Directory of Open Access Journals (Sweden)

    Anthony Magueresse

    2013-01-01

    Full Text Available Hemp concrete is a sustainable lightweight concrete that became popular in the field of building construction because of its thermal and environmental properties. However; available experimental data on its hygrothermal behavior are rather scarce in the literature. This paper describes the design of a large-scale experiment developed to investigate the hygrothermal behavior of hemp concrete cast around a timber frame through a spraying process; and then coated with lime-based plaster. The equipment is composed of two climatic chambers surrounding the tested wall. The experiment consists of maintaining the indoor climate at constant values and applying incremental steps of temperature; relative humidity or vapor pressure in the outdoor chamber. Temperature and relative humidity of the room air and on various depths inside the wall are continuously registered during the experiments and evaporation phenomena are observed. The influence of the plaster on the hygrothermal behavior of hemp concrete is investigated. Moreover; a comparison of experimental temperatures with numerical results obtained from a purely conductive thermal model is proposed. Comparing the model with the measured data gave satisfactory agreement.

  20. Effects of carbon fiber surface characteristics on interfacial bonding of epoxy resin composite subjected to hygrothermal treatments

    Science.gov (United States)

    Li, Min; Liu, Hongxin; Gu, Yizhuo; Li, Yanxia; Zhang, Zuoguang

    2014-01-01

    The changes of interfacial bonding of three types of carbon fibers/epoxy resin composite as well as their corresponding desized carbon fiber composites subjecting to hygrothermal conditions were investigated by means of single fiber fragmentation test. The interfacial fracture energy was obtained to evaluate the interfacial bonding before and after boiling water aging. The surface characteristics of the studied carbon fiber were characterized using X-ray photoelectron spectroscopy. The effects of activated carbon atoms and silicon element at carbon fiber surface on the interfacial hygrothermal resistance were further discussed. The results show that the three carbon fiber composites with the same resin matrix possess different hygrothermal resistances of interface and the interfacial fracture energy after water aging can not recovery to the level of raw dry sample (irreversible changes) for the carbon fiber composites containing silicon. Furthermore, the activated carbon atoms have little impact on the interfacial hygrothermal resistance. The irreversible variations of interfacial bonding and the differences among different carbon fiber composites are attributed to the silicon element on the carbon fiber bodies, which might result in hydrolyzation in boiling water treatment and degrade interfacial hygrothermal resistance.

  1. Isothermal and hygrothermal agings of hybrid glass fiber/carbon fiber composite

    Science.gov (United States)

    Barjasteh, Ehsan

    in the oxygen-transport properties (diffusivity and solubility of oxygen). The effect of thermal aging on mechanical properties of the aged composites was investigated. A relationship was derived relating TOL to tensile strength of the hybrid composite. The tensile strength remained essentially unchanged by thermal oxidation after 52 weeks of exposure. On the contrary, the oxidation resulted in a decrease in short-beam-shear (SBS) strength (a matrix-dominated property) due to degradation of matrix and fiber/matrix interface strength. However, the filled composites showed a lower reduction in SBS strength than that of the unfilled one for an identical duration of exposure. In addition, the effect of thermal aging on glass transition temperature (T g) was determined for isothermal exposures at 180ºC and 200ºC. The simultaneous effects of post-curing and thermal degradation resulted in the change in Tg during exposure. Another study on the composite rod was performed to investigate the sorption kinetics and the effects of moisture on mechanical and physical properties. Sorption curves were obtained for both hybrid and non-hybrid composite rods to determine characteristic parameters, including the diffusion coefficient (D) and the maximum moisture uptake (Minfinity ). The moisture uptake for the hybrid composites generally exhibited Fickian behavior (no hybridization effects), behaving much like non-hybrid composites. A two-dimensional diffusion model was employed to calculate moisture diffusivities in the longitudinal direction. Interfaces and thermally-induced residual stresses affected the moisture diffusion. In addition, the effect of hygrothermal aging on glass transition temperature (Tg), short beam shear strength (SBS), and tensile strength was determined for hygrothermal exposure at 60°C and 85% relative humidity (RH). Property retention and reversibility of property degradation was also measured. Microscopic inspection revealed no evidence of damage

  2. Effect of Thermal Bridges in Insulated Walls on Air-Conditioning Loads Using Whole Building Energy Analysis

    Directory of Open Access Journals (Sweden)

    Mohamed F. Zedan

    2016-06-01

    Full Text Available Thermal bridges in building walls are usually caused by mortar joints between insulated building blocks and by the presence of concrete columns and beams within the building envelope. These bridges create an easy path for heat transmission and therefore increase air-conditioning loads. In this study, the effects of mortar joints only on cooling and heating loads in a typical two-story villa in Riyadh are investigated using whole building energy analysis. All loads found in the villa, which broadly include ventilation, transmission, solar and internal loads, are considered with schedules based on local lifestyles. The thermal bridging effect of mortar joints is simulated by reducing wall thermal resistance by a percentage that depends on the bridges to wall area ratio (TB area ratio or Amj/Atot and the nominal thermal insulation thickness (Lins. These percentage reductions are obtained from a correlation developed by using a rigorous 2D dynamic model of heat transmission through walls with mortar joints. The reduction in thermal resistance is achieved through minor reductions in insulation thickness, thereby keeping the thermal mass of the wall essentially unchanged. Results indicate that yearly and monthly cooling loads increase almost linearly with the thermal bridge to wall area ratio. The increase in the villa’s yearly loads varies from about 3% for Amj/Atot = 0.02 to about 11% for Amj/Atot = 0.08. The monthly increase is not uniform over the year and reaches a maximum in August, where it ranges from 5% for Amj/Atot = 0.02 to 15% for Amj/Atot = 0.08. In winter, results show that yearly heating loads are generally very small compared to cooling loads and that heating is only needed in December, January and February, starting from late night to late morning. Monthly heating loads increase with the thermal bridge area ratio; however, the variation is not as linear as observed in cooling loads. The present results highlight the importance of

  3. Hygrothermal Effect on the Impact Response of Carbon Composites with Epoxy Resin Enhanced by Nanoclays

    Science.gov (United States)

    Reis, P. N. B.; Silva, A. P.; Santos, P.; Ferreira, J. A. M.

    2013-09-01

    This paper presents the results of the hygrothermal effect on the impact response of carbon/epoxy composites and the benefits gained from doping the epoxy resin with nanoclays previously subjected to a silane treatment appropriate for the resin. The nanoclay reinforcement increased the maximum load and the elastic recovery of the composites. The thermal degradation caused by exposure to 60°C for 10 days was insignificant, while the immersion in water at 60°C for 30 days led to a continuous reduction in the maximum load and the elastic recovery. Multiple impacts resulted in a continuous and nearly linear degradation of the impact response both of dry and environmentally assisted specimens.

  4. Nonlocal microstructure-dependent dynamic stability of refined porous FG nanoplates in hygro-thermal environments

    Science.gov (United States)

    Reza Barati, Mohammad

    2017-10-01

    Based on the generalized nonlocal strain gradient theory (NSGT), dynamic modeling and analysis of nanoporous inhomogeneous nanoplates is presented. Therefore, it is possible to capture both stiffness-softening and stiffness-hardening effects for a more accurate dynamic analysis of nanoplates. The nanoplate is in hygro-thermal environments and is subjected to an in-plane harmonic load. Porosities are incorporated to the model based on a modified rule of mixture. Modeling of the porous nanoplate is conducted according to a refined four-variable plate theory with fewer field variables than in the first-order plate theory. The governing equations and related classical and nonclassical boundary conditions are derived based on Hamilton's principle. These equations are solved for hinged nanoplates via Galerkin's method. It is shown that porosities, moisture rise, temperature rise, nonlocal parameter, strain gradient parameter, material gradation, elastic foundation and uniform dynamic load have a remarkable influence on the dynamic behavior of nanoscale plates.

  5. Actual measurement, hygrothermal response experiment and growth prediction analysis of microbial contamination of central air conditioning system in Dalian, China.

    Science.gov (United States)

    Lv, Yang; Hu, Guangyao; Wang, Chunyang; Yuan, Wenjie; Wei, Shanshan; Gao, Jiaoqi; Wang, Boyuan; Song, Fangchao

    2017-04-03

    The microbial contamination of central air conditioning system is one of the important factors that affect the indoor air quality. Actual measurement and analysis were carried out on microbial contamination in central air conditioning system at a venue in Dalian, China. Illumina miseq method was used and three fungal samples of two units were analysed by high throughput sequencing. Results showed that the predominant fungus in air conditioning unit A and B were Candida spp. and Cladosporium spp., and two fungus were further used in the hygrothermal response experiment. Based on the data of Cladosporium in hygrothermal response experiment, this paper used the logistic equation and the Gompertz equation to fit the growth predictive model of Cladosporium genera in different temperature and relative humidity conditions, and the square root model was fitted based on the two environmental factors. In addition, the models were carried on the analysis to verify the accuracy and feasibility of the established model equation.

  6. Assessment on bamboo scrimber as a substitute for timber in building envelope in tropical and humid subtropical climate zones - part 1 hygrothermal properties test

    Science.gov (United States)

    Huang, Zujian; Sun, Yimin; Musso, Florian

    2017-11-01

    Bamboo scrimber was bamboo fiber based panel developed in 2000s that was potential to be an ideal substitute for timber in bamboo growing areas. For obtaining material parameters and evaluating the performance in building envelope, bamboo scrimber was systematically tested for hygrothermal properties, based on the building envelope heat and moisture process model. Static test items included density calculation and vacuum saturation test for basic properties; sorption test for moisture storage properties; capillary absorption test, water vapour transmission test and drying test for moisture transport properties; thermal analysis for heat storage properties; thermal conductivity test, surface light and thermal properties test for heat transport properties. The test results, by comparison with reference timbers showed that bamboo scrimber had higher heat storage and heat transport properties and lower moisture storage and transport properties. The dynamic test in wind tunnel with outdoor weather condition showed that bamboo scrimber had lower moisture absorption and desorption rate than reference hardwood. The significant magnitude difference between the static and dynamic test results showed the necessity of a comprehensive evaluation approach that could take more practical conditions into consideration.

  7. A Procedure to Measure the in-Situ Hygrothermal Behavior of Earth Walls

    Directory of Open Access Journals (Sweden)

    Pierre-Antoine Chabriac

    2014-04-01

    Full Text Available Rammed earth is a sustainable material with low embodied energy. However, its development as a building material requires a better evaluation of its moisture-thermal buffering abilities and its mechanical behavior. Both of these properties are known to strongly depend on the amount of water contained in wall pores and its evolution. Thus the aim of this paper is to present a procedure to measure this key parameter in rammed earth or cob walls by using two types of probes operating on the Time Domain Reflectometry (TDR principle. A calibration procedure for the probes requiring solely four parameters is described. This calibration procedure is then used to monitor the hygrothermal behavior of a rammed earth wall (1.5 m × 1 m × 0.5 m, instrumented by six probes during its manufacture, and submitted to insulated, natural convection and forced convection conditions. These measurements underline the robustness of the calibration procedure over a large range of water content, even if the wall is submitted to quite important temperature variations. They also emphasize the importance of gravity on water content heterogeneity when the saturation is high, as well as the role of liquid-to-vapor phase change on the thermal behavior.

  8. Effect of Hygrothermal Aging on the Mechanical Properties of Fluorinated and Nonfluorinated Clay-Epoxy Nanocomposites

    Science.gov (United States)

    Hamim, Salah U.; Singh, Raman P.

    2014-01-01

    Hydrophilic nature of epoxy polymers can lead to both reversible and irreversible/permanent changes in epoxy upon moisture absorption. The permanent changes leading to the degradation of mechanical properties due to combined effect of moisture and elevated temperature on EPON 862, Nanomer I.28E, and Somasif MAE clay-epoxy nanocomposites are investigated in this study. The extent of permanent degradation on fracture and flexural properties due to the hygrothermal aging is determined by drying the epoxy and their clay-epoxy nanocomposites after moisture absorption. Significant permanent damage is observed for fracture toughness and flexural modulus, while the extent of permanent damage is less significant for flexural strength. It is also observed that permanent degradation in Somasif MAE clay-epoxy nanocomposites is higher compared to Nanomer I.28E clay-epoxy nanocomposites. Fourier transform infrared (FTIR) spectroscopy revealed that both clays retained their original chemical structure after the absorption-desorption cycle without undergoing significant changes. Scanning electron microscopy (SEM) images of the fracture surfaces provide evidence that Somasif MAE clay particles offered very little resistance to crack propagation in case of redried specimens when compared to Nanomer I.28E counterpart. The reason for the observed higher extent of permanent degradation in Somasif MAE clay-epoxy system has been attributed to the weakening of the filler-matrix interface. PMID:27379285

  9. Experimental Study on Hygrothermal Deformation of External Thermal Insulation Cladding Systems with Glazed Hollow Bead

    Directory of Open Access Journals (Sweden)

    Houren Xiong

    2016-01-01

    Full Text Available This research analyzes the thermal and strain behavior of external thermal insulation cladding systems (ETICS with Glazed Hollow Beads (GHB thermal insulation mortar under hygrothermal cycles weather test in order to measure its durability under extreme weather (i.e., sunlight and rain. Thermometers and strain gauges are placed into different wall layers to gather thermal and strain data and another instrument measures the crack dimensions after every 4 cycles. The results showed that the finishing coat shrank at early stage (elastic deformation and then the finishing coat tends to expand and become damaged at later stage (plastic deformation. The deformation of insulation layer is similar to that of the finishing coat but its variation amplitude is smaller. Deformation of substrate expanded with heat and contracted with cold due to the small temperature variation. The length and width of cracks on the finishing coat grew as the experiment progressed but with a decreasing growth rate and the cracks stopped growing around 70 cycles.

  10. External Thermal Insulation Composite Systems: Critical Parameters for Surface Hygrothermal Behaviour

    Directory of Open Access Journals (Sweden)

    Eva Barreira

    2014-01-01

    Full Text Available External Thermal Insulation Composite Systems (ETICS are often used in Europe. Despite its thermal advantages, low cost, and ease of application, this system has serious problems of biological growth causing the cladding defacement. Recent studies pointed that biological growth is due to high values of surface moisture content, which mostly results from the combined effect of exterior surface condensation, wind-driven rain, and drying process. Based on numerical simulation, this paper points the most critical parameters involved in hygrothermal behaviour of ETICS, considering the influence of thermal and hygric properties of the external rendering, the effect of the characteristics of the façade, and the consequences of the exterior and interior climate on exterior surface condensation, wind-driven rain, and drying process. The model used was previously validated by comparison with the results of an “in situ” campaign. The results of the sensitivity analyses show that relative humidity and temperature of the exterior air, atmospheric radiation, and emissivity of the exterior rendering are the parameters that most influence exterior surface condensation. Wind-driven rain depends mostly on horizontal rain, building’s height, wind velocity, and orientation. The drying capacity is influenced by short-wave absorbance, incident solar radiation, and orientation.

  11. THERMAL PERFORMANCE OF BUILDINGS AND BUILDING ENVELOPE SYSTEMS: AN ANNOTATED BIBLIOGRAPHY

    Energy Technology Data Exchange (ETDEWEB)

    Carroll, William L.

    1979-04-01

    A bibliography of published papers describing models, measurement techniques, apparatus, and data for the thermal performance of whole buildings and building envelope systems has been collected (aggregate energy consumption of whole buildings, performance of HVAC equipment, and solar technologies are not included). Summary descriptions of the content of each citation are provided. Measurements on whole buildings or on systems other than walls are sparse. However, new and recently completed measurement facilities are increasing these capabilities. Measurements under dynamic conditions are difficult to accomplish and few reliable data exist. Some analogs have been explored experimentally and analytically. Citations on analytical models are selective and concentrate on methodology that forms the basis of computer programs for whole-building energy analysis. Interesting future directions include new approaches to dynamic measurements, both in the laboratory and in the field, for envelope systems and for whole buildings.

  12. Comparison of the corrosion of fasteners embedded in wood measured in outdoor exposure with the predictions from a combined hygrothermal-corrosion model

    Science.gov (United States)

    Samuel L. Zelinka; Samuel V. Glass; Charles R. Boardman; Dominique Derome

    2016-01-01

    This paper examines the accuracy of a recently developed hygrothermal-corrosion model which predictsthe corrosion of fasteners embedded in wood by comparing the results of the model to a one year fieldtest. Steel and galvanized steel fasteners were embedded into untreated and preservative treated woodand exposed outdoors while weather data were collected. Qualitatively...

  13. Influence of the convective surface transfer coefficients on the Heat, Air, and Moisture (HAM) building performance

    DEFF Research Database (Denmark)

    Steskens, Paul Wilhelmus Maria Hermanus; Janssen, Hans; Rode, Carsten

    2009-01-01

    Current models to predict heat, air and moisture (HAM) conditions in buildings assume constant boundary conditions for the temperature and relative humidity of the neighbouring air and for the surface heat and moisture transfer coefficients. These assumptions may introduce errors in the predicted...... HAM conditions. The paper focuses on the influence of the interior surface heat and moisture transfer coefficients, and investigates its effect on the hygrothermal performance. The parameter study showed that the magnitude of the convective surface transfer coefficients have a relatively large...... influence on the predicted hygrothermal conditions at the surface of a building component and on the heat and vapour exchange with the indoor environment....

  14. The Effects of Hygrothermal Aging on the Impact Penetration Resistance of Triaxially Braided Composites

    Science.gov (United States)

    Pereira, J. Michael; Revilock, Duane M.; Ruggeri, Charles R.; Roberts, Gary D.; Kohlman, Lee W.; Miller, Sandi G.

    2016-01-01

    An experimental study was conducted to measure the effects of long term hygrothermal aging on the impact penetration resistance of triaxially braided polymer composites. Flat panels of three different materials were subjected to repeated cycles of high and low temperature and high and low humidity for two years. Samples of the panels were periodically tested under impact loading during the two year time period. The purpose of the study was to identify and quantify any degradation in impact penetration resistance of these composites under cyclic temperature and humidity conditions experienced by materials in the fan section of commercial gas turbine engines for a representative aircraft flight cycle. The materials tested consisted of Toray ® T700S carbon fibers in a 2D triaxial braid with three different resins, Cycom® PR520, a toughened resin, Hercules® 3502, an untoughened resin and EPON 862, intermediate between the two. The fiber preforms consisted of a quasi-isotropic 0/+60/-60 braid with 24K tows in the axial direction and 12K tows in the bias directions. The composite panels were manufactured using a resin transfer molding process producing panels with a thickness of 0.125 inches. The materials were tested in their as-processed condition and again after one year and two years of aging (1.6 years in the case of E862). The aging process involved subjecting the test panels to two cycles per day of high and low temperature and high and low humidity. A temperature range of -60degF to 250degF and a humidity range of 0 to 85% rh was used to simulate extreme conditions for composite components in the fan section of a commercial gas turbine engine. Additional testing was conducted on the as-processed PR520 composite under cryogenic conditions. After aging there was some change in the failure pattern, but there was no reduction in impact penetration threshold for any of the three systems, and in the case of the 3502 system, a significant increase in penetration

  15. Summary of the Effects of Two Years of Hygro-Thermal Cycling on a Carbon/Epoxy Composite Material

    Science.gov (United States)

    Kohlman, Lee W.; Binienda, Wieslaw K.; Roberts, Gary D.; Miller, Sandi G.; Pereira, J. Michael; Bail, Justin L.

    2011-01-01

    Composite materials are beginning to be used for structures in the fan section of commercial gas turbine engines. This paper explores the type of damage that could occur within one type of composite material after exposure to hygrothermal cycles (temperature/humidity cycles) that are representative of the environment in the fan section of an engine. The effect of this damage on composite material properties is measured. Chemical changes in the matrix material were limited to the exposed surface. Microcrack formation was identified in the composite material. This damage did not cause a significant reduction in tensile strength or impact penetration resistance of the composite material. Additional data is needed to assess the effect of damage on compressive strength.

  16. Moisture absorption and hygrothermal aging in a bismaleimide resin and its carbon fiber composites

    Science.gov (United States)

    Bao, Li-Rong

    Moisture absorption and hygrothermal aging in a commercial bismaleimide (BMI) resin (Cytec 5250-4 RTM) and its carbon fiber composites were systematically studied in this work. The neat resin displays a distinct two-stage absorption behavior, with an initial fast diffusion followed by a gradual increase in weight gain over an extended timescale. The true equilibrium uptake was not reached after two years. The second-stage diffusion is associated with moisture enhanced structural relaxation in the resin. Since water is a good plasticizer, it significantly decreases the glass transition temperature and enhances segmental mobility. Hence, the resin network can slowly relax in response to the swelling stresses created by absorbed moisture, resulting in additional uptake. As the resin is deep in the glassy state, the relaxation process is much slower than diffusion. Therefore, the first stage and second stage are diffusion and relaxation controlled, respectively. A simple mathematical model has been developed to describe this absorption behavior. Though a phenomenological model, this two-stage model can be quantitatively correlated with relaxation theories in the glassy stage. The general application of this model has also been demonstrated. Cyclic absorption experiments indicate that the structural relaxation is irreversible upon desorption. The material response under cyclic absorption conditions is solely determined by the absorption cycles, not the desorption cycles. This phenomenon is consistent with the plasticizing effect of water. Two types of reinforcements are used in the composites, namely, uni-weave and woven fabrics. The diffusivity and water uptake level of the composites are compared with those of the flash in an attempt to deduce the interface effect. In the case of the uni-weave composite, which is essentially a uni-directional fiber composite, the composite diffusivity and uptake level can be predicted from those of the neat resin and the fiber volume

  17. Hygrothermal adaptability traditional housing in Tampico, Mexico / Adaptabilidad higrotérmica de la vivienda tradicional en Tampico, México

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Fuentes Pérez

    2014-09-01

    Full Text Available The annual increase in the concentration of CO2 in the air is on average 1.5 parts per million, is 0.5% per year, due to the anthropogony generating global climate change, estimates half a century predict a temperature rise of about 2.0°C. The human population is facing an environmental intramural and extramural change in housing. This research aims to determine the degree of hygrothermal adaptability into traditional housing during the year of 2013 in Tampico, Mexico. Depending on the level of scientific knowledge and observation the investigator arrives, makes that labour is diachronic first instance, made as a case study because it analyses the research problem in its genesis and historical conformation with an overview. The thermal behaviour is the thread, therefore, is the methodology to implement multimodal type and by triangulation, since different methods applied provide quantitative and qualitative research approach to the experimental oscillating applied to identify patterns of temperature and relative humidity only, not previously performed in this type of housing. El incremento anual de la concentración de CO2 en el aire es por término medio de 1.5 partes por millón, es decir un 0.5% por año, producto de la antropogenia que genera un cambio climático global, las estimaciones a medio siglo pronostican un aumento de temperatura de unos 2.0°C. La población humana está confrontando un cambio ambiental intramuros y extramuros en la vivienda.La presente investigación tiene como objetivo determinar el grado de adaptabilidad higrotérmica, al interior de la vivienda tradicional durante el año de 2013 en Tampico, México.Según el nivel de conocimiento científico y observación al que llega el investigador, formula que el trabajo es en primera instancia diacrónico, conformado como estudio de caso, porque analiza el problema de investigación en su génesis y conformación histórica con una visión de conjunto. El comportamiento

  18. Qualitative separation of the effect of voids on the static mechanical properties of hygrothermally conditioned carbon/epoxy composites

    Directory of Open Access Journals (Sweden)

    2011-08-01

    Full Text Available The paper investigates the effect of voids and hygrothermal conditions on bending, compressive, and interlaminar shear strength (ILSS of T300/914 composite laminates. By adopting different autoclave pressures during a cure cycle, specimens with three different void contents ranging from 0.33% to 1.50% were obtained. Experimental results reveal that compressive, bending strength, and ILSS decrease with increasing void contents and immersion time. The most significant decrease in strength of aged specimens is in the ILSS and compressive strength, followed by the bending strength. The effect of voids on the absorption/desorption behavior is also discussed. For a similar porosity, the compressive strength and ILSS of dried specimens are higher than that of the aged specimens, while they are lower than that of the unaged specimens. The bending strength of the dried specimens is higher than that of the unaged specimens. The experimental results are explained by the supportive micrographs that illustrate different types of voids and their morphology before and after moisture absorption/desorption.

  19. Hygrothermal adaptability traditional housing in Tampico, Mexico / Adaptabilidad higrotérmica de la vivienda tradicional en Tampico, México

    OpenAIRE

    Carlos Alberto Fuentes Pérez

    2014-01-01

    The annual increase in the concentration of CO2 in the air is on average 1.5 parts per million, is 0.5% per year, due to the anthropogony generating global climate change, estimates half a century predict a temperature rise of about 2.0°C. The human population is facing an environmental intramural and extramural change in housing. This research aims to determine the degree of hygrothermal adaptability into traditional housing during the year of 2013 in Tampico, Mexico. Depending on the level ...

  20. Integration of a hygrothermal transfer model for envelope in a building energy simulation model: experimental validation of a HAM-BES co-simulation approach

    Science.gov (United States)

    Ferroukhi, M. Y.; Abahri, K.; Belarbi, R.; Limam, K.

    2017-06-01

    The present paper focuses on studying a new methodology to predict the overall behavior of buildings, which combines two simulation tools: COMSOL Multiphysicsand TRNSYS. The first software is used for the modeling of heat, air and moisture transfer in multilayer porous walls (HAM model—Heat, Air and Moisture transfer), and the second is used to simulate the hygrothermal behavior of the building (BES model—Building Energy Simulation). The combined software applications dynamically solve the mass and energy conservation equations of the two physical models. In this context, a coupled heat, air and mass transfer model is proposed. This model incorporates simultaneously the diffusive, convective and conductive effects on the building elements. Heat transfer is considered in the strongly coupled situation where the mass and heat flux are temperature, vapor pressure and total pressure dependents. The model input parameters are evaluated experimentally through the development of various experimental prototypes in the laboratory. Thereafter, an experimental setup has been established in order to evaluate the hygrothermal process of building walls. The experimental procedure consists to follow the temperature and relative humidity evolutions within the envelope thickness, submitted to controlled and fixed boundary conditions. Finally, using the developed experimental device, comparison between experimental data and numerical solution of the HAM-BES co-simulation platform was undertaken. Results showed good agreement with acceptable errors margins.

  1. Comparing the Methodologies in ASTM G198 Using Combined Hygrothermal-Corrosion Modeling

    Science.gov (United States)

    Samuel L. Zelinka

    2013-01-01

    ASTM G198, “Standard test method for determining the relative corrosion performance of driven fasteners in contact with treated wood,” was accepted by consensus and published in 2011. The method has two different exposure conditions for determining fastener corrosion performance in treated wood. The first method places the wood and embedded fasteners in a...

  2. Project materials [Commercial High Performance Buildings Project

    Energy Technology Data Exchange (ETDEWEB)

    None

    2001-01-01

    The Consortium for High Performance Buildings (ChiPB) is an outgrowth of DOE'S Commercial Whole Buildings Roadmapping initiatives. It is a team-driven public/private partnership that seeks to enable and demonstrate the benefit of buildings that are designed, built and operated to be energy efficient, environmentally sustainable, superior quality, and cost effective.

  3. Whole-building systems integration laboratory survey

    Energy Technology Data Exchange (ETDEWEB)

    Crawley, D.B. (American Consulting Engineers Council, Washington, DC (USA). Research and Management Foundation)

    1989-09-01

    This report was prepared for the Pacific Northwest Laboratory as a subcontracted activity by the Research Management Foundation of the American Consulting Engineers Council. The objective of the survey reported herein was to independently assess the need for a Building System Integration Laboratory from the viewpoint of academicians in the field of building science. The subcontractor-developed questionnaire was sent to 200 professors of architecture and engineering at US universities. In view of this diverse population, the 10% rate of return on the questionnaire was considered acceptable. Although the responses probably do not reflect an unbiased summary of the collective perceptions of the original population surveyed, they do provide a valid insight into the interests and concerns of the academic community with respect to building sciences issues.

  4. Common Exercises in Whole Building HAM Modelling

    DEFF Research Database (Denmark)

    Rode, Carsten; Woloszyn, Monika

    2009-01-01

    Subtask 1 of the IEA ECBCS Annex 41 (IEA 2007) project had the purpose to advance development in modelling of integral Heat, Air and Moisture (HAM) transfer processes that take place in “whole buildings”. Such modelling considers all relevant elements of buildings: The indoor air, building envelope......, inside constructions, furnishing, systems and users. The building elements interact with each other and with the outside climate. Subtask 1 dealt with modelling principles and the arrangement and execution of so-called common exercises with the purpose to gauge how well it was possible to succeed...... in such modelling. The paper gives an overview of the Common Exercises which have been carried out in the Subtask....

  5. Permeable and Hygroscopic Building Envelopes: Hygrothermal Simulations of “Det Naturlige Hus”

    DEFF Research Database (Denmark)

    Bastien, Diane; Winther-Gaasvig, Martin

    2017-01-01

    Unlike most conventional building materials currently used nowadays, natural building materials tend to be hygroscopic and permeable to water vapour. These two characteristics have the potential to improve the longevity and indoor air quality of buildings. For instance, the use of hygroscopic mat...... rain, the maximum mold index reached a value of 0,2. With a recommended threshold of 3, it seems that the wall design investigated here could perform satisfactorily provided that great care is taken to minimize the wall exposure to driving rain....

  6. Interior insulation – Experimental investigation of hygrothermal conditions and damage evaluation of solid masonry façades in a listed building

    DEFF Research Database (Denmark)

    Odgaard, Tommy; Bjarløv, Søren Peter; Rode, Carsten

    2018-01-01

    % on the outside, while the insulated wall showed uniformly distributed values around 80%. The risk of moisture-induced damage was evaluated based on mathematical models for mould and decay of wood, visual inspection for frost and mould, and on-site measurements for presence of mould spores. The damage evaluation......Exterior walls in historic multi-storey buildings compared to walls in modern buildings have low thermal resistance, resulting in high energy loss and cold surfaces/floors in cold climates. When restrictions regarding alteration of the exterior appearance exist, interior insulation might...... be the only possibility to increase occupant comfort. This paper describes an investigation of the hygrothermal influence when applying 100 mm of diffusion open interior insulation to a historic multi-storey solid masonry spandrel. The dormitory room with the insulated spandrel had a normal indoor climate...

  7. Review of research on the hygrothermal environmental durability of structural adhesively bonded joints

    Directory of Open Access Journals (Sweden)

    Xiao HAN

    2017-06-01

    Full Text Available In recent years, structural adhesive bonding technology has been widely used in many industrial fields, with many advantages over traditional mechanical connection methods, such as riveting, welding and bolt connection. Due to the adhesive characteristics of polymer materials, the environmental durability of adhesive joint becomes the key problems in engineering structure connection feasibility and long-term service reliability. On the basis of the review of the research of the hot-humid environmental durability of structural adhesive joints, the effects of temperature, moisture and coupled condition on the structural mechanical behaviour are discussed, introducing the published research progress and results both at home and abroad. The prospects are provided: the future research work can be combined with a variety of observation scales of environmental aging test and numerical simulation method, delve into sub hygroscopic, creep, thermal expansion and hygroscopic expansion aging behavior, such as the environment of model prediction method simulation in more than a variety of mechanical performance degradation behavior of coupling conditions, and provide more reliable theoretical modeling and experimental data for engineering design and application of cementing structure.

  8. Influence of Indoor Hygrothermal Conditions on Human Quality of Life in Social Housing.

    Science.gov (United States)

    Soares, Sara; Fraga, Silvia; Delgado, Joao M P Q; Ramos, Nuno M M

    2015-11-17

    Modern societies spend most of their time indoors, namely at home, and the indoor environment quality turns out to be a crucial factor to health, quality of life and well-being of the residents. The present study aims to understand how indoor environment relates with quality of life and how improving housing conditions impacts on individuals' health. This study case will rely on the following assessments in both rehabilitated and non-rehabilitated social housing: i) field measurements, in social dwellings (namely temperature, relative humidity, carbon dioxide concentration, air velocity, air change rate, level of mould spores and energy consumption); ii) residents' questionnaires on social, demogaphic, behavioural, health characteristics and quality of life. Also, iii) qualitative interviews performed with social housing residents from the rehabilitated houses, addressing the self-perception of living conditions and their influence in health status and quality of life. All the collected information will be combined and analysed in order to achieve the main objective. It is expected to define a Predicted Human Life Quality (PHLQ) index, that combines physical parameters describing the indoor environment measured through engineering techniques with residents' and neighbourhood quality of life characteristics assessed by health questionnaires. Improvement in social housing should be related with better health indicators and the new index might be an important tool contributing to enhance quality of life of the residents. Significance for public healthThis study will contribute to understand how indoor environment relates with quality of life and how improving housing conditions impacts on individuals' health, in social housing neighbourhoods. As so, it is important to share the undertaken methodology carried out by a multidisciplinary team, in order to allow other researchers following comparable studies to adopt a similar approach. The case study results will allow

  9. Effect of hygric and thermal properties of connecting layers on the performance of interior thermal insulation systems

    Science.gov (United States)

    Kočí, Václav; Jerman, Miloš; Fiala, Lukáš; Černý, Robert

    2017-11-01

    Interior thermal insulation systems represent often the only way of thermal protection, especially when historical buildings are taken into account. Since these systems face distrust due to frequent moisture failures, alternative solutions substituting the common water vapor barrier are being sought. In this paper, an assessment of hygrothermal performance of interior thermal insulation systems with purposely developed connecting layers is presented. Two types of mineral wools are connected to a sandstone masonry using two different connecting materials. The hygrothermal performance of the wall is obtained as a result of computational modelling with experimentally determined material parameters. Dynamic boundary conditions in the form of climatic data for Prague are used. The results indicate that the combination of permeable thermal insulation materials with investigated connecting layers have a positive influence on hygrothermal performance of the system as the moisture content is kept on very low level during a reference year. On the other hand, an increased attention should be paid to the protection of the masonry against excessive weather straining due to the absence of exterior thermal insulation.

  10. Combining building thermal simulation methods and LCA methods

    DEFF Research Database (Denmark)

    Pedersen, Frank; Hansen, Klaus; Wittchen, Kim Bjarne

    2008-01-01

    of buildings (as expressed in EU Directive 2002/91/EC), may in the future be supplemented by requirements to the environmental impact of buildings. This can be seen by the fact that EU recently has given EN mandate to prepare standards for environmental assessment of buildings (CEN/TC 350).......Thsi paper describes recent efforts made by the Danish Building Research Institute regarding the integration of a life cycle assessment (LCA) method into a whole building hygro-thermal simulation tool. The motivation for the work is that the increased requirements to the energy performance...

  11. Hygrothermal Ageing and Damage Characterization in Epoxies and in Epoxy-Glass Interfaces: a Micromechanical Approach Using Embedded Optical Sensors

    OpenAIRE

    Lai, Marco

    2011-01-01

    Nowadays, composite materials are increasingly used in high technology fields such as aerospace and automotive because of the combination of excellent mechanical performance and lightweight. For these characteristics, classical metal alloys are progressively replaced in primary structural components by reinforced polymer composites. The service life of such structural components is more and more increased thus raising questions on the composites' ...

  12. Hygrothermal rehabilitation of public buildings.A case study on “Luceafărul” theatre in Jassy

    Directory of Open Access Journals (Sweden)

    Adrian IACOB

    2014-07-01

    Full Text Available In the selection of thermo-energetic rehabilitation solutions, there are certain restrictions determined especially by the imperative of preserving the architectural characteristics, a large proportion of these buildings falling under the categories of historic or cultural monuments of high architectural value. Under the second category comes “Luceafărul” Theatre from Jassy, a representative edifice for the area in which it is located. The requirement of conserving the current appearance of the façade areas veneered with travertine has imposed the placing of thermal insulation on the interior surface. Taking into account that interior insulation implies a higher risk of interstitial condensation, a non-steady state coupled heat and mass transfer analysis was performed, by using the WUFI program. The results of this study are plotted as annual variations of relative humidity in the structure of envelope elements, pointing out the layers that are susceptible of excessive values. By numerical simulation of heat transfer with ANSYS program, the discussion is extended with the influence that the insulation of two adjacent envelope elements has on the surface condesation risk, for the case in which at the thermal bridge obtained there a discontinuity exists in the insulation layer.

  13. Commercial Building Energy Baseline Modeling Software: Performance Metrics and Method Testing with Open Source Models and Implications for Proprietary Software Testing

    Energy Technology Data Exchange (ETDEWEB)

    Price, Phillip N.; Granderson, Jessica; Sohn, Michael; Addy, Nathan; Jump, David

    2013-09-01

    The overarching goal of this work is to advance the capabilities of technology evaluators in evaluating the building-level baseline modeling capabilities of Energy Management and Information System (EMIS) software. Through their customer engagement platforms and products, EMIS software products have the potential to produce whole-building energy savings through multiple strategies: building system operation improvements, equipment efficiency upgrades and replacements, and inducement of behavioral change among the occupants and operations personnel. Some offerings may also automate the quantification of whole-building energy savings, relative to a baseline period, using empirical models that relate energy consumption to key influencing parameters, such as ambient weather conditions and building operation schedule. These automated baseline models can be used to streamline the whole-building measurement and verification (M&V) process, and therefore are of critical importance in the context of multi-measure whole-building focused utility efficiency programs. This report documents the findings of a study that was conducted to begin answering critical questions regarding quantification of savings at the whole-building level, and the use of automated and commercial software tools. To evaluate the modeling capabilities of EMIS software particular to the use case of whole-building savings estimation, four research questions were addressed: 1. What is a general methodology that can be used to evaluate baseline model performance, both in terms of a) overall robustness, and b) relative to other models? 2. How can that general methodology be applied to evaluate proprietary models that are embedded in commercial EMIS tools? How might one handle practical issues associated with data security, intellectual property, appropriate testing ‘blinds’, and large data sets? 3. How can buildings be pre-screened to identify those that are the most model-predictable, and therefore those

  14. Simulation Tests in Whole Building Heat and Moisture Transfer

    DEFF Research Database (Denmark)

    Rode, Carsten; Peuhkuri, Ruut Hannele; Woloszyn, Monika

    2006-01-01

    An important part of the International Energy Agency project, ECBCS, Annex 41 is about modelling the integral heat, air and moisture transfer processes that take place in “whole buildings”. Such modelling deals with all most relevant elements of buildings: The indoor air, the building envelope...

  15. Study on the energy performance of glazing surfaces

    Directory of Open Access Journals (Sweden)

    Ligia MOGA

    2014-12-01

    Full Text Available A proper thermal design of the building envelope represents an important factor for the energy economics. Glazing surfaces represent one of the important elements in the hygrothermal design activity of a building envelope. The window’s thermal performance has also a strong influence on the thermal performance of the opaque area of the wall. This fact imposed the research of the real interaction, of cooperation and of mutual influences of the characteristics between the two components of the wall of the building envelope, respectively the opaque and the glazing area. Optimal constructive details for the opaque and glazing area of the wall need to be properly designed in order to achieve the required thermal and energy performances imposed for new types of buildings, e.g. passive houses, zero energy buildings.

  16. Performative

    DEFF Research Database (Denmark)

    Sack-Nielsen, Torsten

    2015-01-01

    The article describes the potential of building skins being climate-adaptive. The principle of folding, and the relation between form and performance of facades are discussed here.......The article describes the potential of building skins being climate-adaptive. The principle of folding, and the relation between form and performance of facades are discussed here....

  17. Material characterization models and test methods for historic building materials

    DEFF Research Database (Denmark)

    Hansen, Tessa Kvist; Peuhkuri, Ruut Hannele; Møller, Eva B.

    2017-01-01

    Predictions of long term hygrothermal performance can be assessed by dynamic hygrothermal simulations, in which material parameters are crucial input. Material parameters for especially historic materials are often unknown; therefore, there is a need to determine important parameters, and simple...

  18. Influência de diferentes condições higrotérmicas na resistência à tração de compósitos de fibra de carbono/epóxi modificada Influence of different hygrothermal conditions on the tensile strength of carbon/epoxy 8552 composites

    Directory of Open Access Journals (Sweden)

    José Antônio P. Cunha

    2006-01-01

    Full Text Available Este trabalho foi direcionado para a análise dos efeitos higrotérmicos na resistência à tração de compósitos poliméricos termorrígidos. Foram investigados os efeitos da umidade e da temperatura sobre as resistências à tração longitudinal e à tração transversal de compósitos ([0/0]s de fita de carbono unidirecional impregnada com resina epóxi 8552. Os ensaios de resistência à tração longitudinal, realizados à temperatura ambiente, mostraram que as amostras não perderam sua resistência quando condicionadas. Porém, os compósitos apresentaram uma redução na sua resistência quando submetidos à câmara de climatização (80 °C e 90% de umidade e ensaiados à temperatura elevada. Já nos ensaios de tração transversal foi observado que as amostras submetidas à câmara de névoa salina e ensaiadas à temperatura ambiente apresentaram uma pequena redução na sua resistência, porém as amostras submetidas à câmara de climatização mostraram uma redução acentuada na resistência As amostras ensaiadas à temperatura elevada e submetidas à câmara de névoa salina apresentaram uma pequena diminuição na sua resistência (11%. Já uma acentuada diminuição da resistência à tração transversal (51% foi observada quando as amostras de compósitos poliméricos foram submetidas à câmara de climatização e ensaiadas à temperatura elevada. Também foram obtidas fotomicrografias via microscopia eletrônica de varredura (MEV das seções de fraturas das amostras ensaiadas em tração em todos os tipos de condicionamento estudados no presente trabalho. Todos estes fatos mostraram que a matriz polimérica é afetada nos ensaios à temperatura elevada.This work focused the analysis of hygrothermal ageing effects on the tensile strength of thermoset laminated composites. Humidity and temperature effects on the longitudinal and transversal tensile strengths of carbon fiber/epoxy 8552 unidirectional laminates tape

  19. PERFORMANCE

    Directory of Open Access Journals (Sweden)

    M Cilli

    2014-10-01

    Full Text Available This study aimed to investigate the kinematic and kinetic changes when resistance is applied in horizontal and vertical directions, produced by using different percentages of body weight, caused by jumping movements during a dynamic warm-up. The group of subjects consisted of 35 voluntary male athletes (19 basketball and 16 volleyball players; age: 23.4 ± 1.4 years, training experience: 9.6 ± 2.7 years; height: 177.2 ± 5.7 cm, body weight: 69.9 ± 6.9 kg studying Physical Education, who had a jump training background and who were training for 2 hours, on 4 days in a week. A dynamic warm-up protocol containing seven specific resistance movements with specific resistance corresponding to different percentages of body weight (2%, 4%, 6%, 8%, 10% was applied randomly on non consecutive days. Effects of different warm-up protocols were assessed by pre-/post- exercise changes in jump height in the countermovement jump (CMJ and the squat jump (SJ measured using a force platform and changes in hip and knee joint angles at the end of the eccentric phase measured using a video camera. A significant increase in jump height was observed in the dynamic resistance warm-up conducted with different percentages of body weight (p 0.05. In jump movements before and after the warm-up, while no significant difference between the vertical ground reaction forces applied by athletes was observed (p>0.05, in some cases of resistance, a significant reduction was observed in hip and knee joint angles (p<0.05. The dynamic resistance warm-up method was found to cause changes in the kinematics of jumping movements, as well as an increase in jump height values. As a result, dynamic warm-up exercises could be applicable in cases of resistance corresponding to 6-10% of body weight applied in horizontal and vertical directions in order to increase the jump performance acutely.

  20. A CFD model for analysis of performance, water and thermal distribution, and mechanical related failure in PEM fuel cells

    Directory of Open Access Journals (Sweden)

    Maher A.R. Sadiq Al-Baghdadi

    2016-07-01

    Full Text Available This paper presents a comprehensive three–dimensional, multi–phase, non-isothermal model of a Proton Exchange Membrane (PEM fuel cell that incorporates significant physical processes and key parameters affecting the fuel cell performance. The model construction involves equations derivation, boundary conditions setting, and solution algorithm flow chart. Equations in gas flow channels, gas diffusion layers (GDLs, catalyst layers (CLs, and membrane as well as equations governing cell potential and hygro-thermal stresses are described. The algorithm flow chart starts from input of the desired cell current density, initialization, iteration of the equations solution, and finalizations by calculating the cell potential. In order to analyze performance, water and thermal distribution, and mechanical related failure in the cell, the equations are solved using a computational fluid dynamic (CFD code. Performance analysis includes a performance curve which plots the cell potential (Volt against nominal current density (A/cm2 as well as losses. Velocity vectors of gas and liquid water, liquid water saturation, and water content profile are calculated. Thermal distribution is then calculated together with hygro-thermal stresses and deformation. The CFD model was executed under boundary conditions of 20°C room temperature, 35% relative humidity, and 1 MPA pressure on the lower surface. Parameters values of membrane electrode assembly (MEA and other base conditions are selected. A cell with dimension of 1 mm x 1 mm x 50 mm is used as the object of analysis. The nominal current density of 1.4 A/cm2 is given as the input of the CFD calculation. The results show that the model represents well the performance curve obtained through experiment. Moreover, it can be concluded that the model can help in understanding complex process in the cell which is hard to be studied experimentally, and also provides computer aided tool for design and optimization of PEM

  1. Introduction to Building Systems Performance: Houses that Work II. Revised February 2005

    Energy Technology Data Exchange (ETDEWEB)

    None

    2005-03-01

    The Building Science Consortium (BSC) design recommendations are based on the hygrothermal regions with reference to the annual rainfall. Local climate must be addressed if it differs significantly from the climate described for a particular design.

  2. Introduction to Building Systems Performance: Houses That Work II; Period of Performance: January 2003--December 2003

    Energy Technology Data Exchange (ETDEWEB)

    2004-04-01

    Buildings should be suited to their environments. Design and construction must be responsive to varying seismic risks, wind loads, and snow loads, as well as soil conditions, frost depth, orientation, and solar radiation. In addition, building envelopes and mechanical systems should be designed for a specific hygro-thermal regions, rain exposure, and interior climate. The Building Science Consortium (BSC) design recommendations are based on the hygro-thermal regions with reference to the annual rainfall. Local climate must be addressed if it differs significantly from the climate described for a particular design.

  3. Efeito higrotérmico em prepregs de fibra de vidro/epóxi por espectroscopia de luminescência Hygrothermal effect in glass fiber/epoxy by luminescence spectroscopy

    Directory of Open Access Journals (Sweden)

    Rita de Cássia M. Sales

    2008-03-01

    Full Text Available O objetivo deste trabalho é o estudo do efeito higrotérmico em pré-impregnados (prepreg não curados de fibra de vidro-resina epoxídica usando a técnica de espectroscopia eletrônica de luminescência em modo estacionário. O método de fluorescência extrínseca foi empregado utilizando-se a sonda 9- ácido antróico (9-AA, cujo comportamento fotofísico depende fortemente da polaridade do meio. As amostras foram submetidas a umidades relativas de 6 e 84% por meio da utilização de soluções aquosas saturadas de hidróxido de sódio a 34,5 °C e cloreto de potássio a 20,0 °C, em recipientes fechados, pelos períodos de tempo de 1 semana, 15 dias e 1 mês. As amostras submetidas à umidade relativa de 6% apresentaram aumento significativo das intensidades relativas dos espectros de fluorescência em relação à amostra referência. Este comportamento fotofísico foi atribuído à presença da forma protonada do 9-AA no meio devido à reticulação da matriz polimérica. Após 1 mês, o espectro de emissão apresenta uma diminuição da intensidade em seu máximo. Isto ocorreu provavelmente devido ao processo de plastificação da matriz polimérica promovido pela presença de água na matriz, confirmado pela análise gravimétrica. Os espectros de fluorescência extrínseca das amostras submetidas à umidade relativa de 84% apresentaram as seguintes modificações espectrais: a decaimento da intensidade de emissão das curvas b e d; b deslocamento da banda de emissão para a região do azul devido ao aumento do teor de água; e c aparecimento de um ombro na banda de emissão em 424 e 472 nm. Este comportamento fotofísico foi atribuído ao deslocamento do equilíbrio químico da forma protonada para a forma ionizada do 9-AA, promovido pela entrada de umidade no material.The work is aimed at studying hygrothermal effects on uncured glass-epoxy fiber prepreg (F-161 - Hexcel Co. using luminescence spectroscopy under steady

  4. Approach to Assessing the Long-term Performance of Wall Assemblies – Durability of Low-rise Wood-frame walls

    DEFF Research Database (Denmark)

    Lacasse, Michael A.; Morelli, Martin

    2017-01-01

    The long-term performance or durability of wall assemblies in respect to the moisture management of components of which comprise the wall depends on the hygrothermal response of the wall to local climate loads. Critical factors in estimating the longevity of wood frame structures include limiting...... the temperature range, wood moisture content and time of exposure to conditions suitable for the onset, growth and propagation of mould and rot to occur. Several approaches to assessing the vulnerability of wood frame structures to deterioration have been developed in recent years some of which suggest applying...... in which the LSD approach is applied to low-rise wood-frame walls, as are built in North America, and that incorporate drainage components, such components forming part of a rain screen wall assembly. The use of this approach permits determining whether wall assemblies incorporating novel components...

  5. Predicting Energy Performance of a Net-Zero Energy Building: A Statistical Approach

    Science.gov (United States)

    Kneifel, Joshua; Webb, David

    2016-01-01

    Performance-based building requirements have become more prevalent because it gives freedom in building design while still maintaining or exceeding the energy performance required by prescriptive-based requirements. In order to determine if building designs reach target energy efficiency improvements, it is necessary to estimate the energy performance of a building using predictive models and different weather conditions. Physics-based whole building energy simulation modeling is the most common approach. However, these physics-based models include underlying assumptions and require significant amounts of information in order to specify the input parameter values. An alternative approach to test the performance of a building is to develop a statistically derived predictive regression model using post-occupancy data that can accurately predict energy consumption and production based on a few common weather-based factors, thus requiring less information than simulation models. A regression model based on measured data should be able to predict energy performance of a building for a given day as long as the weather conditions are similar to those during the data collection time frame. This article uses data from the National Institute of Standards and Technology (NIST) Net-Zero Energy Residential Test Facility (NZERTF) to develop and validate a regression model to predict the energy performance of the NZERTF using two weather variables aggregated to the daily level, applies the model to estimate the energy performance of hypothetical NZERTFs located in different cities in the Mixed-Humid climate zone, and compares these estimates to the results from already existing EnergyPlus whole building energy simulations. This regression model exhibits agreement with EnergyPlus predictive trends in energy production and net consumption, but differs greatly in energy consumption. The model can be used as a framework for alternative and more complex models based on the

  6. Thinking Like a Whole Building: A Whole Foods Market New Construction Case Study

    Energy Technology Data Exchange (ETDEWEB)

    Deru, M.; Bonnema, E.; Doebber, I.; Hirsch, A.; McIntyre, M.; Scheib, J.

    2011-04-01

    Whole Foods Market participates in the U.S. Department of Energy's Commercial Building Partnerships (CBP) to identify and develop cost-effective, readily deployed, replicable energy efficiency measures (EEMs) for commercial buildings. Whole Foods Market is working with the National Renewable Energy Laboratory (NREL) on a retrofit and a new construction CBP project. Whole Foods Market's CBP new construction project is a standalone store in Raleigh, North Carolina. Whole Foods Market examined the energy systems and the interactions between those systems in the design for the new Raleigh store. Based on this collaboration and preliminary energy modeling, Whole Foods Market and NREL identified a number of cost-effective EEMs that can be readily deployed in other Whole Foods Market stores and in other U.S. supermarkets. If the actual savings in the Raleigh store - which NREL will monitor and verify - match the modeling results, each year this store will save nearly $100,000 in operating costs (Raleigh's rates are about $0.06/kWh for electricity and $0.83/therm for natural gas). The store will also use 41% less energy than a Standard 90.1-compliant store and avoid about 3.7 million pounds of carbon dioxide emissions.

  7. The synergy of the whole: building a global system for clinical trials to accelerate medicines development.

    Science.gov (United States)

    Koski, Greg; Tobin, Mary F; Whalen, Matthew

    2014-10-01

    The pharmaceutical industry, once highly respected, productive, and profitable, is in the throes of major change driven by many forces, including economics, science, regulation, and ethics. A variety of initiatives and partnerships have been launched to improve efficiency and productivity but without significant effect because they have failed to consider the process as a system. Addressing the challenges facing this complex endeavor requires more than modifications of individual processes; it requires a fully integrated application of systems thinking and an understanding of the desired goals and complex interactions among essential components and stakeholders of the whole. A multistakeholder collaborative effort, led by the Alliance for Clinical Research Excellence and Safety (ACRES), a global nonprofit organization operating in the public interest, is now under way to build a shared global system for clinical research. Its systems approach focuses on the interconnection of stakeholders at critical points of interaction within 4 operational domains: site development and support, quality management, information technology, and safety. The ACRES initiatives, Site Accreditation and Standards, Product Safety Culture, Global Ethical Review and Regulatory Innovation, and Quality Assurance and Safety, focus on building and implementing systems solutions. Underpinning these initiatives is an open, shared, integrated technology (site and optics and quality informatics initiative). We describe the rationale, challenges, progress, and successes of this effort to date and lessons learned. The complexity and fragmentation of the intensely proprietary ecosystem of drug development, challenging regulatory climate, and magnitude of the endeavor itself pose significant challenges, but the economic, social, and scientific rewards will more than justify the effort. An effective alliance model requires a willingness of multiple stakeholders to work together to build a shared system within a noncompetitive space that will have major benefits for all, including better access to medicines, better health, and more productive lives. Copyright © 2014 Elsevier HS Journals, Inc. All rights reserved.

  8. Influence of fire barriers on fire performance of facades with combustible insulation

    Directory of Open Access Journals (Sweden)

    Bjegovic Dubravka

    2016-01-01

    Full Text Available In today's modern society sustainability has become a key driver for innovation. Sustainability in buildings is, or at least it should be, strongly interconnected with energy efficiency and fire safety. Unfortunately, cases of fires in buildings all over the world are a wakeup call to start thinking of fire safety as an inevitable part of energy efficiency in buildings. Thermally enhanced building envelopes, due to materials used, can represent significantly increased fire load on façades. To determine their fire performance, it is necessary to move on from material level to the whole building level, i.e. full scale tests. This paper presents findings from comprehensive research on influence of fire barrier on fire performance of External Thermal Insulation Composite System – ETICS with combustible thermal insulation. To confirm findings, tests on identical ETICS systems were conducted in March 2014 and May 2014.

  9. Duct thermal performance models for large commercial buildings

    Energy Technology Data Exchange (ETDEWEB)

    Wray, Craig P.

    2003-10-01

    Despite the potential for significant energy savings by reducing duct leakage or other thermal losses from duct systems in large commercial buildings, California Title 24 has no provisions to credit energy-efficient duct systems in these buildings. A substantial reason is the lack of readily available simulation tools to demonstrate the energy-saving benefits associated with efficient duct systems in large commercial buildings. The overall goal of the Efficient Distribution Systems (EDS) project within the PIER High Performance Commercial Building Systems Program is to bridge the gaps in current duct thermal performance modeling capabilities, and to expand our understanding of duct thermal performance in California large commercial buildings. As steps toward this goal, our strategy in the EDS project involves two parts: (1) developing a whole-building energy simulation approach for analyzing duct thermal performance in large commercial buildings, and (2) using the tool to identify the energy impacts of duct leakage in California large commercial buildings, in support of future recommendations to address duct performance in the Title 24 Energy Efficiency Standards for Nonresidential Buildings. The specific technical objectives for the EDS project were to: (1) Identify a near-term whole-building energy simulation approach that can be used in the impacts analysis task of this project (see Objective 3), with little or no modification. A secondary objective is to recommend how to proceed with long-term development of an improved compliance tool for Title 24 that addresses duct thermal performance. (2) Develop an Alternative Calculation Method (ACM) change proposal to include a new metric for thermal distribution system efficiency in the reporting requirements for the 2005 Title 24 Standards. The metric will facilitate future comparisons of different system types using a common ''yardstick''. (3) Using the selected near-term simulation approach

  10. Brookfield Homes Passive House Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Herk, A. [IBACOS, Inc., Pittsburgh, PA (United States); Poerschke, A. [IBACOS, Inc., Pittsburgh, PA (United States); Beach, R. [IBACOS, Inc., Pittsburgh, PA (United States)

    2016-02-04

    In 2012-2013, IBACOS worked with a builder, Brookfield Homes in Denver, Colorado, to design and construct a Passive House certified model home. IBACOS used several modeling programs and calculation methods to complete the final design package along with Brookfield's architect KGA Studio. This design package included upgrades to the thermal enclosure, basement insulation, windows, and heating, ventilation, and air conditioning. Short-term performance testing in the Passive House was done during construction and after construction. Testing with a blower door indicated that whole-building air leakage to the outside was 324 CFM and 0.60 ACH50. The other two test homes had little short-term testing done post-construction by the local energy rater. IBACOS then monitored the energy consumption and whole-house comfort conditions of that occupied Passive House after one year of operation and compared the monitoring results to those for two other occupied test houses in the same area with similar square footage but slightly different floor plans. IBACOS also assisted the builder, Brookfield Homes, in researching design scenarios for Zero Energy Ready Home and ENERGY STAR acceptance levels. IBACOS also assisted Brookfield in conceptualizing product for Denver's Brighton Heights area. Brookfield was considering building to Zero Energy Ready Home standards in that location. IBACOS provided strategies that Brookfield may draw from in the event the builder chooses to pursue a Zero Energy Ready Home plan for that market.

  11. Introduction to Building Systems Performance: Houses That Work II. Revised February 2005

    Energy Technology Data Exchange (ETDEWEB)

    2005-03-01

    Buildings should be suited to their environments. Design and construction must be responsive to varying seismic risks, wind loads, and snow loads, as well as soil conditions, frost depth, orientation, and solar radiation. In addition, building envelopes and mechanical systems should be designed for a specific hygro-thermal regions, rain exposure, and interior climate. The Building Science Consortium (BSC) design recommendations are based on the hygro-thermal regions with reference to the annual rainfall. Local climate must be addressed if it differs significantly from the climate described for a particular design.

  12. Moisture Performance of Energy-Efficient and Conventional Wood-Frame Wall Assemblies in a Mixed-Humid Climate

    Directory of Open Access Journals (Sweden)

    Samuel V. Glass

    2015-07-01

    Full Text Available Long-term moisture performance is a critical consideration for design and construction of building envelopes in energy-efficient buildings, yet field measurements of moisture characteristics for highly insulated wood-frame walls in mixed-humid climates are lacking. Temperature, relative humidity, and moisture content of wood framing and oriented strand board (OSB structural panel sheathing were measured over a period from mid-November 2011 through March 2013 in both north- and south-facing orientations in test structures near Washington, DC, USA. Wall configurations varied in exterior cladding, water-resistive barrier, level of cavity insulation, presence of exterior continuous insulation, and interior vapor retarder. The combination of high interior humidity and high vapor permeance of painted gypsum board led to significant moisture accumulation in OSB sheathing during winter in walls without a vapor retarder. In contrast, wintertime moisture accumulation was not significant with an interior kraft vapor retarder. Extruded polystyrene exterior insulation had a predictable effect on wall cavity temperature but a marginal impact on OSB moisture content in walls with vinyl siding and interior kraft vapor retarder. Hygrothermal simulations approximately captured the timing of seasonal changes in OSB moisture content, differences between north- and south-facing walls, and differences between walls with and without an interior kraft vapor retarder.

  13. Data and Analytics to Inform Energy Retrofit of High Performance Buildings

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Tianzhen; Yang, Le; Hill, David; Feng, Wei

    2014-01-25

    Buildings consume more than one-third of the world?s primary energy. Reducing energy use in buildings with energy efficient technologies is feasible and also driven by energy policies such as energy benchmarking, disclosure, rating, and labeling in both the developed and developing countries. Current energy retrofits focus on the existing building stocks, especially older buildings, but the growing number of new high performance buildings built around the world raises a question that how these buildings perform and whether there are retrofit opportunities to further reduce their energy use. This is a new and unique problem for the building industry. Traditional energy audit or analysis methods are inadequate to look deep into the energy use of the high performance buildings. This study aims to tackle this problem with a new holistic approach powered by building performance data and analytics. First, three types of measured data are introduced, including the time series energy use, building systems operating conditions, and indoor and outdoor environmental parameters. An energy data model based on the ISO Standard 12655 is used to represent the energy use in buildings in a three-level hierarchy. Secondly, a suite of analytics were proposed to analyze energy use and to identify retrofit measures for high performance buildings. The data-driven analytics are based on monitored data at short time intervals, and cover three levels of analysis ? energy profiling, benchmarking and diagnostics. Thirdly, the analytics were applied to a high performance building in California to analyze its energy use and identify retrofit opportunities, including: (1) analyzing patterns of major energy end-use categories at various time scales, (2) benchmarking the whole building total energy use as well as major end-uses against its peers, (3) benchmarking the power usage effectiveness for the data center, which is the largest electricity consumer in this building, and (4) diagnosing HVAC

  14. Hygrothermal response of a dwelling house. Thermal comfort criteria

    Directory of Open Access Journals (Sweden)

    Adrian IACOB

    2015-12-01

    Full Text Available The use of local natural materials in order to reduce the environmental negative impact of buildings has become common practice in recent years; such buildings are to be found in all regions of the planet. The high level of thermal protection provided by the envelope elements made from natural materials such as straw bale insulation, hemp insulation or sheep wool, and their lack of thermal massiveness require a more complex analysis on their ability to keep interior comfort without accentuated variations. This paper proposes a comparative analysis between different solutions for a residential building located near a Romanian city, Cluj-Napoca. The elements of the building envelope are designed in three alternative solutions, using as substitute to classical solutions (concrete and polystyrene, masonry and polystyrene, straw bales and rammed earth for enclosing elements. For this purpose there are conducted numerical simulations of heat and mass transfer, using a mathematical model that allows the analysis of indoor comfort, by comparing both objective factors (air temperature, operative temperature and relative humidity and subjective factors, which are needed to define interior thermal comfort indices PPD and PMV. Finally, a set of conclusions are presented and future research directions are drawn.

  15. Modeling Local Hygrothermal Interaction: Local surface transfer coefficients

    DEFF Research Database (Denmark)

    Steskens, Paul Wilhelmus Maria Hermanus; Janssen, Hans; Rode, Carsten

    2009-01-01

    Current models to predict heat, air and moisture (HAM) conditions in building components assume uniform boundary conditions, both for the temperature and relative humidity of the air in an indoor space as well as for the heat and moisture surface transfer coefficients. In order to obtain a reliable...... and moisture transfer coefficients. The research showed that the developed model gives good agreement with the local convective surface transfer coefficients predicted from CFD. The main advantage of the presented (sub)zonal airflow model is that the computational effort is relatively small, while...... the predictions of the local surface transfer coefficients are relatively accurate....

  16. Passive hygrothermal control of a museum storage building

    DEFF Research Database (Denmark)

    Christensen, Jørgen Erik; Janssen, Hans

    2011-01-01

    For optimal conservation of the stored objects, museum storage buildings require a very stable interior climate, with only minimal and slow variations in temperature and relative humidity. Often extensive HVAC is installed to provide such stable indoor conditions, which results in a great amout...

  17. Cyclic hygrothermal aging of aircraft lightning protections: Phenomenological overview

    KAUST Repository

    Lubineau, Gilles

    2012-04-23

    The recent transition to full composite fuselages is a major breakthrough in aeronautical design. To ensure satisfactory lightning protection, the electrical properties of the primary composite structure need to be improved and a design solution lies on bonding a metallic fishnet to the fuselage. An important issue is the prediction of the aging behavior of this top layer when exposed to severe aging conditions representative of flight environment. Multiple aging mechanisms affect this top layer made of thermoset resin and metallic fishnet with complex geometry and a first modeling strategy is a necessary starting point to better understand its evolution. This paper describes the overall phenomenology and the different mechanisms that can be expected in such a structure.

  18. Invention, design and performance of coconut agrowaste fiberboards for ecologically efficacious buildings

    Science.gov (United States)

    Lokko, Mae-ling Jovenes

    As global quantities of waste by-products from food production as well as the range of their applications increase, researchers are realizing critical opportunities to transform the burden of underutilized wastes into ecological profits. Within the tropical hot-humid region, where half the world's current and projected future population growth is concentrated, there is a dire demand for building materials to meet ambitious development schemes and rising housing deficits. However, the building sector has largely overlooked the potential of local agricultural wastes to serve as alternatives to energy-intensive, imported building technologies. Industrial ecologists have recently investigated the use of agrowaste biocomposites to replace conventional wood products that use harmful urea-formaldehyde, phenolic and isocyanate resins. Furthermore, developments in the performance of building material systems with respect to cost, energy, air quality management and construction innovation have evolved metrics about what constitutes material 'upcycling' within building life cycle. While these developments have largely been focused on technical and cost performance, much less attention has been paid to addressing deeply-seated social and cultural barriers to adoption that have sedimented over decades of importation. This dissertation evaluates the development coconut agricultural building material systems in four phases: (i) non-toxic, low-energy production of medium-high density boards (500-1200 kg/m3) from coconut fibers and emerging biobinders; (ii) characterization and evaluation of coconut agricultural building materials hygrothermal performance (iii) scaled-up design development of coconut modular building material systems and (iv) development of a value translation framework for the bottom-up distribution of value to stakeholders within the upcycling framework. This integrated design methodological approach is significant to develop ecological thinking around agrowaste

  19. Environmental performance of green building code and certification systems.

    Science.gov (United States)

    Suh, Sangwon; Tomar, Shivira; Leighton, Matthew; Kneifel, Joshua

    2014-01-01

    We examined the potential life-cycle environmental impact reduction of three green building code and certification (GBCC) systems: LEED, ASHRAE 189.1, and IgCC. A recently completed whole-building life cycle assessment (LCA) database of NIST was applied to a prototype building model specification by NREL. TRACI 2.0 of EPA was used for life cycle impact assessment (LCIA). The results showed that the baseline building model generates about 18 thousand metric tons CO2-equiv. of greenhouse gases (GHGs) and consumes 6 terajoule (TJ) of primary energy and 328 million liter of water over its life-cycle. Overall, GBCC-compliant building models generated 0% to 25% less environmental impacts than the baseline case (average 14% reduction). The largest reductions were associated with acidification (25%), human health-respiratory (24%), and global warming (GW) (22%), while no reductions were observed for ozone layer depletion (OD) and land use (LU). The performances of the three GBCC-compliant building models measured in life-cycle impact reduction were comparable. A sensitivity analysis showed that the comparative results were reasonably robust, although some results were relatively sensitive to the behavioral parameters, including employee transportation and purchased electricity during the occupancy phase (average sensitivity coefficients 0.26-0.29).

  20. Performing Performance Design Anglonationally

    DEFF Research Database (Denmark)

    2016-01-01

    Video recording of pecha kucha style bricolage aural enactment of an international version of performance design......Video recording of pecha kucha style bricolage aural enactment of an international version of performance design...

  1. Methodology for Modeling Building Energy Performance across the Commercial Sector

    Energy Technology Data Exchange (ETDEWEB)

    Griffith, B.; Long, N.; Torcellini, P.; Judkoff, R.; Crawley, D.; Ryan, J.

    2008-03-01

    This report uses EnergyPlus simulations of each building in the 2003 Commercial Buildings Energy Consumption Survey (CBECS) to document and demonstrate bottom-up methods of modeling the entire U.S. commercial buildings sector (EIA 2006). The ability to use a whole-building simulation tool to model the entire sector is of interest because the energy models enable us to answer subsequent 'what-if' questions that involve technologies and practices related to energy. This report documents how the whole-building models were generated from the building characteristics in 2003 CBECS and compares the simulation results to the survey data for energy use.

  2. Method for a component-based economic optimisation in design of whole building renovation versus demolishing and rebuilding

    DEFF Research Database (Denmark)

    Morelli, Martin; Harrestrup, Maria; Svendsen, Svend

    2014-01-01

    investing in retrofit measures and buying renewable energy. The overall cost of the renovation considers the market value of the property, the investment in the renovation, the operational and maintenance costs. A multi-family building is used as an example to clearly illustrate the application......Aim: This paper presents a two-fold evaluation method determining whether to renovate an existing building or to demolish it and thereafter erect a new building. Scope: The method determines a combination of energy saving measures that have been optimised in regards to the future cost for energy....... Subsequently, the method evaluates the cost of undertaking the retrofit measures as compared to the cost of demolishing the existing building and thereafter erecting a new one. Several economically beneficial combinations of energy saving measures can be determined. All of them are a trade-off between...

  3. The Building Fabric Thermal Performance of Passivhaus Dwellings—Does It Do What It Says on the Tin?

    Directory of Open Access Journals (Sweden)

    David Johnston

    2016-01-01

    Full Text Available The Passivhaus (or Passive House Standard is one of the world’s most widely known voluntary energy performance standards. For a dwelling to achieve the Standard and be granted Certification, the building fabric requires careful design and detailing, high levels of thermal insulation, building airtightness, close site supervision and careful workmanship. However, achieving Passivhaus Certification is not a guarantee that the thermal performance of the building fabric as designed will actually be achieved in situ. This paper presents the results obtained from measuring the in situ whole building heat loss coefficient (HLC of a small number of Certified Passivhaus case study dwellings. They are located on different sites and constructed using different technologies in the UK. Despite the small and non-random nature of the dwelling sample, the results obtained from the in situ measurements revealed that the thermal performance of the building fabric, for all of the dwellings, performed very close to the design predictions. This suggests that in terms of the thermal performance of the building fabric, Passivhaus does exactly what it says on the tin.

  4. PERFORMANCE EVALUATION OF CEILING RADIANT COOLING SYSTEM IN COMPOSITE CLIMATE

    Energy Technology Data Exchange (ETDEWEB)

    Sharma, Anuj [Malaviya National Institute of Technology (MNIT), Jaipur, India; Mathur, Jyotirmay [Malaviya National Institute of Technology (MNIT), Jaipur, India; Bhandari, Mahabir S [ORNL

    2015-01-01

    Radiant cooling systems are proving to be an energy efficient solution due to higher thermal capacity of cooling fluid especially for the buildings that require individual zone controls and where the latent loads are moderate. The Conventional air conditioners work at very low temperature i.e.5-8 c (refrigerant evaporator inlet) while the radiant cooling systems, also referred as high temperature cooling system, work at high temperatures i.e. 14-18 c. The radiant cooling systems can maintain lower MRT (Mean Radiant Temperature) as ceiling panels maintain uniform temperature gradient inside room and provide higher human comfort. The radiant cooling systems are relatively new systems and their operation and energy savings potential are not quantified for a large number of buildings and operational parameters. Moreover, there are only limited numbers of whole building simulation studies have been carried out for these systems to have a full confidence in the capability of modelling tools to simulate these systems and predict the impact of various operating parameters. Theoretically, savings achieve due to higher temperature set point of chilled water, which reduces chiller-running time. However, conventional air conditioner runs continuously to maintain requisite temperature. In this paper, experimental study for performance evaluation of radiant cooling system carried out on system installed at Malaviya National Institute of Technology Jaipur. This paper quantifies the energy savings opportunities and effective temperature by radiant cooling system at different chilled water flow rates and temperature range. The data collected/ analysed through experimental study will used for calibration and validation of system model of building prepared in building performance simulation software. This validated model used for exploring optimized combinations of key parameters for composite climate. These optimized combinations will used in formulation of radiant cooling system

  5. Performing Nation, Performing Difference

    DEFF Research Database (Denmark)

    Jensen, Lars

    Baz Luhrmann's Australia is simultaneously a film made for an Australian and an international audience. One of the interesting question this raises is how Luhrmann performs the nation for the national and the international audience. The film's juxtaposition of the national epic of pioneering...

  6. Performance, Performance System, and High Performance System

    Science.gov (United States)

    Jang, Hwan Young

    2009-01-01

    This article proposes needed transitions in the field of human performance technology. The following three transitions are discussed: transitioning from training to performance, transitioning from performance to performance system, and transitioning from learning organization to high performance system. A proposed framework that comprises…

  7. Wynkoop Building Performance Measurement: Water

    Energy Technology Data Exchange (ETDEWEB)

    Fowler, Kimberly M.; Kora, Angela R.

    2012-08-26

    -flush toilet handles was reversed. The building management retrofitted the building's toilets with handles that operated on reduced flush when pushed down (0.8 gallons) and full flush when pulled up (1.1 gallons). The water pressure on the 5th floor (< 30 psi) is less than half the pressure on the 7th floor (>80 psi). The measured water savings post-retrofit was lower on the 5th floor than the 7th floor. The differences in water pressure may have had an impact on the quantity of water used per floor. The second floor water use was examined prior to and following the toilet fixture retrofit. This floor is where conference rooms for non-building occupants are available for use, thus occupancy is highly variable. The 3-day average volume per flush event was higher post-retrofit (0.79 gallons per event), in contrast to pre-retrofit (0.57 gallons per event). There were 40% more flush events post retrofit, which impacted the findings. Water use in the third floor fitness center was also measured for a limited number of days. Because of water line accessibility, only water use on the men's side of the fitness center was measured and from that the total fitness center water use was estimated. Using the limited data collected, the fitness center shower water use is approximately 2% of the whole building water use. Overall water use in the Wynkoop Building is below the industry baseline and GSA expectations. The dual flush fixture replacement appears to have resulted in additional water savings that are expected to show a savings in the total annual water use.

  8. Performance Poolsheet

    Data.gov (United States)

    US Agency for International Development — The Performance Poolsheet is an MS Access database that captures performance appraisal data for employees eligible for performance awards. Microsoft Access database...

  9. Advanced Energy Retrofit Guide (AERG): Practical Ways to Improve Energy Performance; Healthcare Facilities (Book)

    Energy Technology Data Exchange (ETDEWEB)

    Hendron, R.; Leach, M.; Bonnema, E.; Shekhar, D.; Pless, S.

    2013-09-01

    The Advanced Energy Retrofit Guide for Healthcare Facilities is part of a series of retrofit guides commissioned by the U.S. Department of Energy. By presenting general project planning guidance as well as detailed descriptions and financial payback metrics for the most important and relevant energy efficiency measures (EEMs), the guides provide a practical roadmap for effectively planning and implementing performance improvements in existing buildings. The Advanced Energy Retrofit Guides (AERGs) are intended to address key segments of the U.S. commercial building stock: retail stores, office buildings, K-12 schools, grocery stores, and healthcare facilities. The guides' general project planning considerations are applicable nationwide; the energy and cost savings estimates for recommended EEMs were developed based on energy simulations and cost estimates for an example hospital tailored to five distinct climate regions. These results can be extrapolated to other U.S. climate zones. Analysis is presented for individual EEMs, and for packages of recommended EEMs for two project types: existing building commissioning projects that apply low-cost and no-cost measures, and whole-building retrofits involving more capital-intensive measures.

  10. Environmental Performance

    DEFF Research Database (Denmark)

    Svabo, Connie; Lindelof, Anja Mølle

    from the perspective of time and liveness as experienced in art on environmental performance discussing how environmental performances frame the temporality of the world. The paper engages with contemporary examples of environmental performances from various disciplines (sound, video, television...

  11. Dj Performance

    DEFF Research Database (Denmark)

    Dj Performance at a late concert at The Hub, Plymouth, in support of Sileni, Superconductor and others.......Dj Performance at a late concert at The Hub, Plymouth, in support of Sileni, Superconductor and others....

  12. Environmental Performance

    DEFF Research Database (Denmark)

    Lindelof, Anja Mølle; Schmidt, Ulrik; Svabo, Connie

    2017-01-01

    as its starting point to investigate liveness within a specific kind of contemporary performance: ‘environmental performances’. Environmental performances are arts practices that take environmental processes as their focus by framing activities of non-human performers such as clouds, wind and weeds - key...

  13. Performing Identities

    DEFF Research Database (Denmark)

    von Wallpach, Sylvia; Hemetsberger, Andrea; Espersen, Peter

    2017-01-01

    performative approaches to branding, this study applies a performativity theory perspective. Brand performances—encompassing playing and liking, basement building and showcasing, creating and innovating, community building and facilitating, storytelling, missionizing, and marketplace developing—exhibit generic...... ludic, creative, economic, and socializing qualities and co-construct involved identities. The findings contribute to a dynamic view of brand identity, highlighting brand identity's performative construction alongside constructions of stakeholder identities and the strong interrelatedness of company...

  14. Job performance

    OpenAIRE

    Tesařová, Markéta

    2008-01-01

    The goal of diploma thesis is to outline possible connections to job performance and to prove that the job performance issue is more and more actual and over and over discussed in business circles and also among HR managers and firm owners. Job performance management should be always placed in the middle of their concern. Because of permanent changes in business environment where organizations must face the competition managers should make an effort to implement evaluation system and performa...

  15. Assessing the performance of an advanced integrated facade by means of simulation: The ACTRESS facade case study

    Directory of Open Access Journals (Sweden)

    Fabio Favoino

    2015-11-01

    Full Text Available The growing demand for both building energy efficiency and indoor environmental comfort is leading to a substantial evolution of the traditional concept of the building envelope. The future building skin is required to be responsive and dynamic, actively regulating the flows of heat, light, air and water from outdoor to indoor and vice versa, in order to effectively respond to ever-changing climatic conditions, occupant comfort and energy efficiency requirements. In the framework of a decade-long research activity on Advanced Integrated Facade, AIF, a new Multifunctional Facade Module called ACTRESS has been conceived: the ACTive, RESponsive and Solar envelope is designedto play different roles through its ability to change its thermo-physical behaviour in order to suit the different environmental conditions. This paper briefly illustrates the ACTRESS MFM concept and its functional strategies, focusing on the simulation and the assessment of the performance of such a dynamic envelope. The numerical study was conducted in order to evaluate the potential energy savings achievable with such a facade and to evaluate different functional strategies and options. The evaluation of the performance in terms of energy savings was done at both component and whole-building level. Moreover this work presents an example of the applicability of Building Performance Simulation tools to the design of an innovative and dynamic facade system, discussing the capability of BPS software in simulating and evaluating the performance of such systems. The results show that the ACTRESS MFM can effectively reduce the total primary energy consumption of an office building up to 55% compared with a reference facade complying with national regulations. On the other hand modelling assumptions and simplifications are needed in order to evaluate the performance of such a system with BPS software, representing a barrier to the design and the adoption of advanced facade systems in

  16. Performing compliance

    DEFF Research Database (Denmark)

    Wimmelmann, Camilla Lawaetz

    2017-01-01

    the local policy workers front-staged some practices in the implementation process and back-staged others. The local policy workers deliberately performed ‘guideline compliance’ by using information control and impression management techniques. The findings suggest that local guideline compliance should...... be regarded as a staged performance in which deliberate techniques are used to produce and manage certain impressions of compliance....

  17. Performative Tectonics

    DEFF Research Database (Denmark)

    Holst, Malene Kirstine; Mullins, Michael; Kirkegaard, Poul Henning

    2010-01-01

    This paper studies two digital generative tools in terms of Performative Tectonics. Performative Tectonics is a term developed in the paper, which links the contemporary development of digital tools to the tectonic tradition of architecture. Within the theoretical framework of this definition......, the paper presents case studies of the structural optimisation software eifForm, and the parametric modelling software Generative-Components....

  18. School Performance

    Science.gov (United States)

    Lamas, Héctor A.

    2015-01-01

    The school performance study of students is, due to its relevance and complexity, one of the issues of major controversy in the educational research, and it has been given special attention in the last decades. This study is intended to show a conceptual approach to the school performance construct, contextualizing the reality in the regular basic…

  19. Individual Performance

    DEFF Research Database (Denmark)

    Andersen, Lotte Bøgh; Heinesen, Eskil; Pedersen, Lene Holm

    2016-01-01

    of the assessment. Our investigated explanatory variables are intrinsic motivation, public service motivation, and job satisfaction. Combining survey and administrative data for 747 lower secondary school teachers (teaching 5,679 students in 85 schools), we analyze 4 different measures of the same performance......Performance is perhaps the most central concept in public administration research, and this article discusses theoretically and investigates empirically how we can obtain more consistent performance measures. Theoretically, we combine existing arguments in public administration with institutional...... theory and the sociology of professions. Empirically, we ask whether different measures of individual performance produce different results. The investigated performance measures vary with regard to risk of common data source bias, standardization of assessment criteria, and external verification...

  20. Organizational Performance

    Directory of Open Access Journals (Sweden)

    Renata Peregrino de Brito

    2016-01-01

    Full Text Available This paper presents a theoretical and empirical analysis of the relationship between human resource management (HRM and organizational performance. Theoretically, we discuss the importance of HRM for the development of resources and its impact on business performance. Empirically, we evaluated articles published on Brazilian academic journals that addressed such relationships. The results showed a lack of studies conducted at this intersection. From the universe of 2,469 articles, only 16 (0.6% sought to relate HRM and organizational performance. We observed a dominance of isolated HR practices, which does not consider HRM as a system, and of operational performance measures, relative to financial and efficiency variables. Most studies show a positive relationship between HRM practices and performance, in line with the literature. However, we point out some methodological issues, such as the difficulty of isolating the HR practices from its context, the failure to consider the temporality of this relationship, and the comparison between companies from different industries.

  1. Performance Management and Performance Appraisal

    OpenAIRE

    Mudříková, Zuzana

    2008-01-01

    The main objective of the bachelor's labour is to search and judge the rules and processes in the area of performance management and performance appraisal used in the company NOVACS, then to confront applied theory with used practise, to identify and to clear up advantages and disadvantages of apllied system of management performance and evaluation of employees, finally try to propose some right alternations and renewals.

  2. Moisture condensation on building envelopes in differential ventilated spaces in the tropics: quantitative assessment of influencing factors

    Directory of Open Access Journals (Sweden)

    Ali Maisarah

    2016-01-01

    Full Text Available Ventilation systems play a significant role in maintaining the indoor thermal and hygric balance. Nevertheless, the systems had been implicated to result in many problems. In the tropical climate, especially for energy efficiency purposes, building spaces are operated with differential ventilation. Such spaces operate on 24-hrs basis, some on 8-hrs while others are either naturally ventilated or served with mechanical supply-exhaust fan systems with non-conditioned outdoor air. This practice had been found to result in condensation problems. This study involves a quantitative appraisal of the effect of operative conditions and hygrothermal quality of building envelopes on condensation risk. The in-situ experiment is combined with an analytical approach to assessing the hygrothermal quality of building envelopes in a tropical climate building under differential ventilation between adjacent spaces. The case-studied building is with a known history of condensation and associated damages including mould growth. The microclimate measurement and hygrothermal performance of the wall and floor against condensation and mould growth risks had been previously reported elsewhere. As a step further, the present study evaluates the effects of various envelope insulation types and configurations together with the HVAC cooling set-points on envelope hygrothermal performance. The results revealed that overcooling the air-conditioned side increases condensation risk on the non-air-conditioned side of the envelopes. The envelopes failed criteria for surface condensation at existing operative conditions irrespective of envelope hygrothermal quality improvements. However, the envelope performed well at improved cooling operative conditions even at existing envelope hygrothermal quality. It is, therefore, important to ascertain the envelope hygrothermal quality as well the cooling operative conditions while embarking on energy efficiency operations in mechanical

  3. Performative Spaces

    DEFF Research Database (Denmark)

    Svaneklink, Annette

    2009-01-01

    that can be related to traditional architectural concepts in terms of dealing with space, body, time and movement. The paper considers this performativity and dual spatiality as being a processual architecture, constantly reconfiguring new hybrids between space, image and user. This dual spatiality raises......Performative aspects of architecture seem to be constituted as a series of actions between place and non-place as well as between place and user. The performative action raises a dual spatiality that relates physical, extended spatiality to temporality. The paper argues that this is a topic...

  4. Cobra Performance

    CERN Document Server

    Lavrijsen, WTLP

    2001-01-01

    This note presents the performance of the Cobra combined muon reconstruction package. It consists of two parts: the first part gives a proof of concept of the generic fit, as implemented in Cobra, and tests the fit qualitatively. The second part uses single tracks to estimate the Cobra 'physics' performance and compares the resultant momentum resolutions with those of the final fits of the Atlas pattern recognition packages iPatRec and Muonbox. The performance of the combined, global fit is compared to the results of the muon identification package MuID.

  5. Performance managenemt

    DEFF Research Database (Denmark)

    Jacobi, Claus Brygger

    This paper attempts to identify barriers that prevent performance management from being genuinely result-based. By observing what happened when a Danish workfare reform was implemented by applying performance management, it becomes apparent that there exists internal decouplings on and between two...... levels; a decoupling between the monitoring/evaluation of established performance indicators and the revising of these for policy-making on future interventions, and a decoupling between the strategic political/administrative level and operational street-level, inhibiting its adaption to local...

  6. Performance Hero

    Directory of Open Access Journals (Sweden)

    Craig Derksen

    2009-01-01

    Full Text Available The Guitar Hero series of video games and their spin-offs have provided millions with a new way to interact with music. These games are not only culturally significant but also philosophically significant. Based on the way that these games allow people to interact with music we must decide that either playing a song in one of these games can be a legitimate performance of that song or that our current accounts of performance are inadequate.

  7. Performance of Modular Prefabricated Architecture: Case Study-Based Review and Future Pathways

    Directory of Open Access Journals (Sweden)

    Fred Edmond Boafo

    2016-06-01

    Full Text Available Even though tightened building energy efficiency standards are implemented periodically in many countries, existing buildings continually consume a momentous quota of the total primary energy. Energy efficiency solutions range from material components to bulk systems. A technique of building construction, referred to as prefabricated architecture (prefab, is increasing in reputation. Prefab encompasses the offsite fabrication of building components to a greater degree of finish as bulk building structures and systems, and their assembly on-site. In this context, prefab improves the speed of construction, quality of architecture, efficiency of materials, and worker safety, while limiting environmental impacts of construction, as compared to conventional site-built construction practices. Quite recently, a 57 story skyscraper was built in 19 days using prefabricated modules. From the building physics point of view, the bulk systems and tighter integration method of prefab minimizes thermal bridges. This study seeks to clearly characterize the levels of prefab and to investigate the performance of modular prefab; considering acoustic constrain, seismic resistance, thermal behavior, energy consumption, and life cycle analysis of existing prefab cases and, thus, provides a dynamic case study-based review. Generally, prefab can be categorized into components, panels (2D, modules (3D, hybrids, and unitized whole buildings. On average, greenhouse gas emissions from conventional construction were higher than for modular construction, not discounting some individual discrepancies. Few studies have focused on monitored data on prefab and occupants’ comfort but additional studies are required to understand the public’s perception of the technology. The scope of the work examined will be of interest to building engineers, manufacturers, and energy experts, as well as serve as a foundational reference for future study.

  8. Re-Assessing Green Building Performance: A Post Occupancy Evaluation of 22 GSA Buildings

    Energy Technology Data Exchange (ETDEWEB)

    Fowler, Kimberly M.; Rauch, Emily M.; Henderson, Jordan W.; Kora, Angela R.

    2010-06-01

    2nd report on the performance of GSA's sustainably designed buildings. The purpose of this study was to provide an overview of measured whole building performance as it compares to GSA and industry baselines. The PNNL research team found the data analysis illuminated strengths and weaknesses of individual buildings as well as the portfolio of buildings. This section includes summary data, observations that cross multiple performance metrics, discussion of lessons learned from this research, and opportunities for future research. The summary of annual data for each of the performance metrics is provided in Table 25. The data represent 1 year of measurements and are not associated with any specific design features or strategies. Where available, multiple years of data were examined and there were minimal significant differences between the years. Individually focused post occupancy evaluation (POEs) would allow for more detailed analysis of the buildings. Examining building performance over multiple years could potentially offer a useful diagnostic tool for identifying building operations that are in need of operational changes. Investigating what the connection is between the building performance and the design intent would offer potential design guidance and possible insight into building operation strategies. The 'aggregate operating cost' metric used in this study represents the costs that were available for developing a comparative industry baseline for office buildings. The costs include water utilities, energy utilities, general maintenance, grounds maintenance, waste and recycling, and janitorial costs. Three of the buildings that cost more than the baseline in Figure 45 have higher maintenance costs than the baseline, and one has higher energy costs. Given the volume of data collected and analyzed for this study, the inevitable request is for a simple answer with respect to sustainably designed building performance. As previously stated

  9. Performance Design

    DEFF Research Database (Denmark)

    Svabo, Connie

    2017-01-01

    Contribution to conference: Art and Presence The emerging field of Performance Design is unfolded as a bastard form of research/art/design/practice, with shapeshifting, monstruous, hybrid and transformational qualities. The potential for presencing, which emerges out of momentarily transgressing...

  10. Urban performances

    DEFF Research Database (Denmark)

    Samson, Kristine

    2012-01-01

    Through three different urban performances, the paper investigates how, when and under which circumstances urban space is transformed and distorted from its every day use and power relations. Distortion is an annual street festival in Copenhagen with the objective to distort the functional city...... creates an intensive space for the empowerment and liberation of the body. Occupy Wall street and its action in the autumn 2001 is the ultimate example of how urban political performances intensifies and transform every day spaces. Through examples of how OWS tactically appropriates and transforms urban...... space, I seek to show how representational space, for instance the public square, is transformed and distorted by heterogeneous and unforeseen modes of operating. Despite differing in their goal and outset, I wish to unfold an alternative to urban transformation practices in planning and architecture...

  11. Everyday Performance

    OpenAIRE

    Wallace, Lewis; Haladyn, Dennis; Grønnebæk, Christian; Hansen, Johannes; Jensen, Mikkel; Larsen, Rasmus

    2014-01-01

    This paper will strive to comprehend performance-studie’s ability to enlighten individuals’ upon an inferred technological impact within their everyday lives. More precisely, revolve around its paradigmatic capacity to act as a foundation for the pragmatic establishment of an interactive exhibition, where such reflection is to occur. Thus proposing a reflection encapsulated and enabled through the interaction of a representative system constituent of systematically arranged technological arte...

  12. Performance Assessment: Lessons from Performers

    Science.gov (United States)

    Parkes, Kelly A.

    2010-01-01

    The performing arts studio is a highly complex learning setting, and assessing student outcomes relative to reliable and valid standards has presented challenges to this teaching and learning method. Building from the general international higher education literature, this article illustrates details, processes, and solutions, drawing on…

  13. Hygrothermal risk on building heritage a methodology for a risk map

    CERN Document Server

    Delgado, João M P Q; Freitas, Vasco Peixoto

    2015-01-01

    This book presents a critical review of a criterion of risk, created to assess the flood risk to heritage buildings, and evaluates this criterion by applying it to the sample Portuguese heritage buildings. In a first approach, the total number of potential parameters is effectively reduced and the selected criteria are divided into two different groups: the monument’s location in relation to a waterway, and the behaviour of its construction material in contact with water. Above all, the book discusses the importance of architectural heritage and argues for the need to safeguard it from extreme climatic phenomena such as floods. As such, the book vividly reminds the scientific community that the intensification of the global warming and climate change will worsen throughout the 21st century, and that it is therefore necessary to adopt preventive measures to minimize, mitigate and control these adverse effects if we hope to avoid catastrophic consequences. At the same time, the book takes into account a broad...

  14. Hygrothermal effects on dynamic mechanical snalysis and fracture behavior of polymeric composites

    Directory of Open Access Journals (Sweden)

    Michelle Leali Costa

    2005-09-01

    Full Text Available Polymer composites used above their glass transition temperatures Tg present a substantial degradation of physical properties; therefore a material's glass transition temperature and its change with moisture absorption are of practical importance. Little attention has been paid to the role of the adhesive bonding between the reinforcing fiber and matrix, particularly for BMI matrix. In this work the effect of moisture on the dynamic mechanical behavior and the fiber/matrix interface was investigated. Two systems were evaluated: carbon fabric/epoxy and carbon fabric/bismaleimide laminates. The results demonstrated that the moisture absorbed by the laminates causes either reversible or irreversible plasticization of the matrix. The humidity combined with the temperature effects may cause significant changes in the Tg matrix and toughness affecting the laminate strength. Moisture absorption was correlated to the fracture mode of the laminate demonstrating the deleterious effect of moisture on the interface. This leads to debonding between fiber and matrix. This behavior was investigated by scanning electron microscopy and dynamic mechanical analysis.

  15. Comparison of stochastic search optimization algorithms for the laminated composites under mechanical and hygrothermal loadings

    OpenAIRE

    Aydın, Levent; Artem, Hatice Seçil

    2011-01-01

    The aim of the present study is to design the stacking sequence of the laminated composites that have low coefficient of thermal expansion and high elastic moduli. In design process, multi-objective genetic algorithm optimization of the carbon fiber laminated composite plates is verified by single objective optimization approach using three different stochastic optimization methods: genetic algorithm, generalized pattern search, and simulated annealing. However, both the multi- and single-obj...

  16. Hygrothermal evaluation of a museum storage building based on actual measurements and simulations

    DEFF Research Database (Denmark)

    Christensen, Jørgen Erik; Kollias, Christos Georgios

    2015-01-01

    Museum storage buildings should be able to provide a considerable stable indoor environment in terms of temperature and relative humidity (RH). To obtain such stable conditions with the lowest possible energy consumption, passive air conditioning is one-way solution. In this paper, indoor...... environment facilities of a passive museum storage building in Vejle region in Denmark, are investigated. Results demonstrate that the weather conditions of the previous yearś considerably affect the indoor environment of the storage. What is more, concentrated dehumidification is a sufficient technique...

  17. Hygrothermal effects on the tensile strength of carbon/epoxy laminates with molded edges

    Directory of Open Access Journals (Sweden)

    Cândido Geraldo Maurício

    2000-01-01

    Full Text Available The interlaminar stresses are confined to a region near the free edge. Therefore, the laminate stacking sequence and the free edge finishing are some of the factors that affect the strength of the laminate and limit its life. The use of molded edges eliminates the need for trimming and machining the laminates edges thus improving productivity. However, this fabrication technique may have a detrimental effect on the laminate strength for certain stacking sequences. This effect in the presence of moisture has not been characterized. This work presents the results of a comparative study of the resistance to delamination of laminates with machined edges and molded edges. Additionally, two environmental conditions were considered: dry laminates and laminates saturated with moisture. The tensile strength of the laminates were measured and micrographs were used to analyze the microstructure of the laminates near the free edges. It is concluded that the mechanical properties of advanced composites depend on the environmental conditions and the fabrication techniques used to produce the laminates. Therefore, it is necessary to account for these factors when experimentally determining the design allowables.

  18. Combining hygrothermal and corrosion models to predict corrosion of metal fasteners embedded in wood

    Science.gov (United States)

    Samuel L. Zelinka; Dominique Derome; Samuel V. Glass

    2011-01-01

    A combined heat, moisture, and corrosion model is presented and used to simulate the corrosion of metal fasteners embedded in solid wood exposed to the exterior environment. First, the moisture content and temperature at the wood/fastener interface is determined at each time step. Then, the amount of corrosion is determined spatially using an empirical corrosion rate...

  19. Application of data mining techniques in the analysis of indoor hygrothermal conditions

    CERN Document Server

    Ramos, Nuno M M; Almeida, Ricardo M S F; Simões, Maria L; Manuel, Sofia

    2016-01-01

    The main benefit of the book is that it explores available methodologies for both conducting in-situ measurements and adequately exploring the results, based on a case study that illustrates the benefits and difficulties of concurrent methodologies. The case study corresponds to a set of 25 social housing dwellings where an extensive in situ measurement campaign was conducted. The dwellings are located in the same quarter of a city. Measurements included indoor temperature and relative humidity, with continuous log in different rooms of each dwelling, blower-door tests and complete outdoor conditions provided by a nearby weather station. The book includes a variety of scientific and engineering disciplines, such as building physics, probability and statistics and civil engineering. It presents a synthesis of the current state of knowledge for benefit of professional engineers and scientists.

  20. Algorithm and Computer Program for the Dynamic Analysis of Hygrothermal Behaviour in Residential Buildings

    Directory of Open Access Journals (Sweden)

    Rodica Rotberg

    2004-01-01

    Full Text Available A program for the non-steady state calculus of the thermal condition of buildings is proposed. A harmonical model has been used to creating this program. The detailed presentation of the algorithm is followed by a case study drawn up for an enclosure with load-bearing masonry structure situated at intermediate and terminal layers, at different moments: in winter, when the heating is cut-off, and in summer.

  1. Monitoring and simulations of hydrolysis in epoxy matrix composites during hygrothermal aging

    KAUST Repository

    El Yagoubi, Jalal

    2015-01-01

    In this paper, we studied the water transport in thermoset matrices. We used Fourier Transform Infrared analysis (FTIR) during sorption/desorption experiments to investigate the interaction between sorbed water and the epoxy network. Our results demonstrated that the polymer matrix undergoes hydrolysis. We found that the chemical species involved in the reaction process was the residual anhydride groups. These results support the physical basis of the three-dimensional (3D) diffusion/reaction model. We finally showed that this model is able to reproduce multi-cycle sorption/desorption experiment, as well as water uptake in hybrid metal/epoxy samples. We simulated the 3D distributions of the diffusing water and the reacted water.

  2. Hygrothermal Simulation of Wood Exposed To the Effect of External Climate

    Science.gov (United States)

    Dohnal, Jakub; Hradil, Petr; Pencik, Jan

    2017-10-01

    The article is focused on simulation of moisture transfer in wood of norway spruce (Picea abies L.). Experimental specimen was exposed to the northern climatic conditions in Lund University, Sweden. The moisture content of wood was measured 10 mm from the surface for nearly three years. The ABAQUS program was used for numerical modelling of moisture transfer simulation in 3D. The surface sorption of wood was simulated using user defined subroutine DFLUX developed by VTT Research Centre of Finland Ltd. for the needs of European Project Durable Timber Bridges. Climate data for the analysis was used from insitu measurement nearby realized by weather station. The temperature, relative humidity of the air and precipitation data was record each hour. Numerical analysis took into account influence of rain effect on different parts of specimen surface.

  3. Interior thermal insulation systems for historical building envelopes

    Science.gov (United States)

    Jerman, Miloš; Solař, Miloš; Černý, Robert

    2017-11-01

    The design specifics of interior thermal insulation systems applied for historical building envelopes are described. The vapor-tight systems and systems based on capillary thermal insulation materials are taken into account as two basic options differing in building-physical considerations. The possibilities of hygrothermal analysis of renovated historical envelopes including laboratory methods, computer simulation techniques, and in-situ tests are discussed. It is concluded that the application of computational models for hygrothermal assessment of interior thermal insulation systems should always be performed with a particular care. On one hand, they present a very effective tool for both service life assessment and possible planning of subsequent reconstructions. On the other, the hygrothermal analysis of any historical building can involve quite a few potential uncertainties which may affect negatively the accuracy of obtained results.

  4. Performance Monitoring Based on UML Performance Profile

    Science.gov (United States)

    Kim, Dong Kwan; Kim, Chul Jin; Cho, Eun Sook

    In this paper we propose a way of measuring software performance metrics such as response time, throughput, and resource utilization. It is obvious that performance-related Quality of Service (QoS) is one of the important factors which are satisfied for users' needs. The proposed approach uses UML performance profile for the performance specification and aspect-oriented paradigm for the performance measurement. Code instrumentation in AOP is a mechanism to insert source code for performance measurement into business logic code. We used AspectJ, an aspect-oriented extension to the Java. AspectJ code for performance measurement is separated from Java code for functional requirements. Both AspectJ and Java code can be woven together for the performance measurement. The key component of the proposed approach is an AspectJ code generator. It creates AspectJ code for the performance measurement from the UML [1] models containing performance profile.

  5. Asserting Performance Expectations (Formerly Performance Assertions: A Performance Diagnosis Tool)

    Energy Technology Data Exchange (ETDEWEB)

    Vetter, J S; Worley, P

    2002-07-24

    Traditional techniques for performance analysis provide a means for extracting and analyzing raw performance information from applications. Users then reason about and compare this raw performance data to their performance expectations for important application constructs. This comparison can be tedious, difficult, and error-prone for the scale and complexity of today's architectures and software systems. To address this situation, we present a methodology and prototype that allows users to assert performance expectations explicitly in their source code using performance assertions. As the application executes, each performance assertion in the application collects data implicitly to verify the assertion. By allowing the user to specify a performance expectation with individual code segments, the runtime system can jettison raw data for measurements that pass their expectation, while reacting to failures with a variety of responses. We present several compelling uses of performance assertions with our operational prototype including raising a performance exception, validating a performance model, and adapting an algorithm to an architecture empirically at runtime.

  6. Textiles Performance Testing Facilities

    Data.gov (United States)

    Federal Laboratory Consortium — The Textiles Performance Testing Facilities has the capabilities to perform all physical wet and dry performance testing, and visual and instrumental color analysis...

  7. High performance work practices, innovation and performance

    DEFF Research Database (Denmark)

    Jørgensen, Frances; Newton, Cameron; Johnston, Kim

    2013-01-01

    Research spanning nearly 20 years has provided considerable empirical evidence for relationships between High Performance Work Practices (HPWPs) and various measures of performance including increased productivity, improved customer service, and reduced turnover. What stands out from......, and Africa to examine these various questions relating to the HPWP-innovation-performance relationship. Each paper discusses a practice that has been identified in HPWP literature and potential variables that can facilitate or hinder the effects of these practices of innovation- and performance...

  8. Moisture Dynamics in Building Envelopes

    DEFF Research Database (Denmark)

    Peuhkuri, Ruut Hannele

    2003-01-01

    The overall scope of this Thesis "Moisture dynamics in building envelopes" has been to characterise how the various porous insulation materials investigated performed hygrothermally under conditions similar to those in a typical building envelope. As a result of the changing temperature...

  9. Limiting conditions for decay in wood systems

    Science.gov (United States)

    Paul I. Morris; Jerrold E. Winandy

    2002-01-01

    Hygrothermal models can predict temperature and moisture conditions in wall components subjected to real weather data, but specific data and a fundamental understanding of how temperature and wood moisture content dictate the progression of decay under these conditions is required for modellers to predict consequences of decay on building performance. It is well...

  10. Communication through Performance: Hausa Performance Art ...

    African Journals Online (AJOL)

    Such themes include life, death, good and evil. This paper examined performance as a signalling system in communication and how it is deployed by a creative artist. Furthermore, the paper also examined Hausa performance arts. It was discovered that just like in any other nation or community, Hausa performances reflect ...

  11. Mining Association Rules Between Credits in the Leadership in Energy and Environmental Design for New Construction (LEED-NC) Green Building Assessment System

    National Research Council Canada - National Science Library

    Thomas, Benjamin J

    2008-01-01

    The Leadership in Energy and Environmental Design (LEED) Building Assessment System is a performance-based tool for determining the environmental impact of a facility from the whole-building perspective...

  12. Performing surgery: commonalities with performers outside medicine

    Directory of Open Access Journals (Sweden)

    Roger Lister Kneebone

    2016-08-01

    Full Text Available This paper argues for the inclusion of surgery within the canon of performance science. The world of medicine presents rich, complex but relatively under-researched sites of performance. Performative aspects of clinical practice are overshadowed by a focus on the processes and outcomes of medical care, such as diagnostic accuracy and the results of treatment. The primacy of this ‘clinical’ viewpoint - framed by clinical professionals as the application of medical knowledge - hides resonances with performance in other domains. Yet the language of performance is embedded in the culture of surgery - surgeons ‘perform’ operations, work in an operating ‘theatre’ and use ‘instruments’. This paper asks what might come into view if we take this performative language at face value and interrogate surgery from the perspective of performance science. It addresses the following questions: 1.To what extent and in what ways can surgical practice (both consultation and operation be considered as performance?2.How does comparison with two domains domains of non-surgical performance (close-up magic and puppetry illuminate understanding of surgical practice as performance?3.In what ways might including surgery within the canon of performance studies enrich the field of performance science?Two detailed case studies over 5 years with magicians (71.5 hours contact time and puppeteers (50.5 hours contact time identified performative aspects of surgical practice from the perspectives of professionals (as individuals or in groups and audiences. Physical simulation provided a means for non-clinicians to access and experience elements of the surgical world, acting as a prompt for discussion. Thematic analysis was used to establish themes and sub-themes.Key themes were: 1 clinical consultation can be viewed as ‘close-up live performance with a very small audience’ and 2 operative surgery can be viewed as ‘reading bodies within a dextrous team

  13. Performing Archives/Archives of Performance

    DEFF Research Database (Denmark)

    of interdisciplinary fields as well as from various locations in research geographies demonstrate that despite the extensive discourse on the relationship between performance and the archive, inquiry into the productive tensions between ephemerality and permanence is by no means outdated or exhausted. New ways...... of understanding archives, history, and memory emerge and address theories of enactment and intervention, while concepts of performance constantly proliferate and enable a critical focus on archival residue. The contributions in Performing Archives/Archives of Performance cover philosophical inquiries as well...

  14. Distributed performance counters

    Science.gov (United States)

    Davis, Kristan D; Evans, Kahn C; Gara, Alan; Satterfield, David L

    2013-11-26

    A plurality of first performance counter modules is coupled to a plurality of processing cores. The plurality of first performance counter modules is operable to collect performance data associated with the plurality of processing cores respectively. A plurality of second performance counter modules are coupled to a plurality of L2 cache units, and the plurality of second performance counter modules are operable to collect performance data associated with the plurality of L2 cache units respectively. A central performance counter module may be operable to coordinate counter data from the plurality of first performance counter modules and the plurality of second performance modules, the a central performance counter module, the plurality of first performance counter modules, and the plurality of second performance counter modules connected by a daisy chain connection.

  15. Java Performance Mysteries

    Directory of Open Access Journals (Sweden)

    Maldikar Pranita

    2016-01-01

    The contributions of this paper are (1 Observing Java performance mysteries in the cloud, (2 Identifying the sources of performance mysteries, and (3 Obtaining optimal and reproducible performance data.

  16. Biblical Performance Criticism: Performance as Research

    Directory of Open Access Journals (Sweden)

    David Rhoads

    2010-03-01

    Full Text Available The purpose of this paper is to explore the New Testament as performance literature. Recent scholarship has brought to the fore the importance of interpreting the New Testament in the context of the oral cultures of the first century. This leads us to ask about the oral/performance dynamics of the “writings” now in the New Testament canon. The paper is comprised of three parts. Part 1 offers some reasons why the New Testament writings, if they are to be appropriately interpreted in their original oral context, must be treated as performance literature. Part 2 outlines performance criticism as a methodology for this task—constructing first-century scenarios of performance as a context for interpretation, reorienting and expanding methodological approaches to the New Testament as oral literature, and employing contemporary performance as a research tool. Part 3 represents the bulk of the paper, laying out in detail the idea of performance as research, arguing that what we can learn from contemporary performances may help us interpret the New Testament writings in the context of the oral cultures of the first century.

  17. Prognostic Performance Metrics

    Data.gov (United States)

    National Aeronautics and Space Administration — This chapter presents several performance metrics for offline evaluation of prognostics algorithms. A brief overview of different methods employed for performance...

  18. High-Performance Slab-on-Grade Foundation Insulation Retrofits

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, Louise F. [NorthernSTAR, St. Paul, MN (United States); Mosiman, Garrett E. [NorthernSTAR, St. Paul, MN (United States)

    2015-09-01

    A more accurate assessment of slab-on-grade foundation insulation energy savings than traditionally possible is now feasible. This has been enabled by advances in whole building energy simulation with 3-dimensional foundation modelling integration at each time step together with an experimental measurement of the site energy savings of SOG foundation insulation. Ten SOG insulation strategies were evaluated on a test building to identify an optimum retrofit insulation strategy in a zone 6 climate (Minneapolis, MN). The optimum insulation strategy in terms of energy savings and cost effectiveness consisted of two components: (a) R-20 XPS insulation above grade, and, (b) R-20 insulation at grade (comprising an outer layer of R-10 insulation and an interior layer of R-12 poured polyurethane insulation) tapering to R-10 XPS insulation at half the below-grade wall height (the lower half of the stem wall was uninsulated).

  19. Initial cognitive performance predicts longitudinal aviator performance.

    Science.gov (United States)

    Yesavage, Jerome A; Jo, Booil; Adamson, Maheen M; Kennedy, Quinn; Noda, Art; Hernandez, Beatriz; Zeitzer, Jamie M; Friedman, Leah F; Fairchild, Kaci; Scanlon, Blake K; Murphy, Greer M; Taylor, Joy L

    2011-07-01

    The goal of the study was to improve prediction of longitudinal flight simulator performance by studying cognitive factors that may moderate the influence of chronological age. We examined age-related change in aviation performance in aircraft pilots in relation to baseline cognitive ability measures and aviation expertise. Participants were aircraft pilots (N = 276) aged 40-77.9. Flight simulator performance and cognition were tested yearly; there were an average of 4.3 (± 2.7; range 1-13) data points per participant. Each participant was classified into one of the three levels of aviation expertise based on Federal Aviation Administration pilot proficiency ratings: least, moderate, or high expertise. Addition of measures of cognitive processing speed and executive function to a model of age-related change in aviation performance significantly improved the model. Processing speed and executive function performance interacted such that the slowest rate of decline in flight simulator performance was found in aviators with the highest scores on tests of these abilities. Expertise was beneficial to pilots across the age range studied; however, expertise did not show evidence of reducing the effect of age. These data suggest that longitudinal performance on an important real-world activity can be predicted by initial assessment of relevant cognitive abilities.

  20. Guiding Worthy Performance.

    Science.gov (United States)

    Gilbert, Thomas F.

    1978-01-01

    Discusses performance analysis factors and their applications, including (1) three types of performance aids--directories, ensamplers, and queries; (2) training and guidance, including a guide to the use of performance aids and descriptions of three kinds--stimulus, response, and reinforcement; and (3) performance analysis as a tool in training.…

  1. Toward Net Energy Buildings: Design, Construction, and Performance of the Grand Canyon House

    Energy Technology Data Exchange (ETDEWEB)

    Balcomb, J. D.; Hancock, C. E.; Barker, G.

    1999-06-23

    The Grand Canyon house is a joint project of the DOE's National Renewable Energy Laboratory and the U.S. National Park Service and is part of the International Energy Agency Solar Heating and Cooling Programme Task 13 (Advanced Solar Low-Energy Buildings). Energy consumption of the house, designed using a whole-building low-energy approach, was reduced by 75% compared to an equivalent house built in accordance with American Building Officials Model Energy Code and the Home Energy Rating System criteria.

  2. Industrial Research Performance Management

    CERN Document Server

    Samsonowa, Tatjana

    2012-01-01

    Managers are increasingly concerned with the typical methods available for organizational performance measurement and control. Research into performance measurement, within the field of innovation management, has been variously approached through frameworks for performance measurement in general (for example, the Balanced Scorecard by Norton and Kaplan), R&D performance management, and surveys on in-use Key Performance Indicators (KPIs). It is striking, however, that almost no research has focused explicitly on the performance measurement of research activities, or indeed tried to develop a sy

  3. Winter maintenance performance measure.

    Science.gov (United States)

    2016-01-01

    The Winter Performance Index is a method of quantifying winter storm events and the DOTs response to them. : It is a valuable tool for evaluating the States maintenance practices, performing post-storm analysis, training : maintenance personnel...

  4. R high performance programming

    CERN Document Server

    Lim, Aloysius

    2015-01-01

    This book is for programmers and developers who want to improve the performance of their R programs by making them run faster with large data sets or who are trying to solve a pesky performance problem.

  5. Pavement Subgrade Performance Study

    DEFF Research Database (Denmark)

    Zhang, Wei; Ullidtz, Per; Macdonald, Robin

    1998-01-01

    The report describes the second test in the Danish Road Testing Machine (RTM) under the International Pavement Subgrade Performance Study. Pavement response was measured in different layers, and compared to different theroretical values. Performance in terms of plastic strains, rutting...

  6. Evaluating clinicians’ teaching performance

    NARCIS (Netherlands)

    Boerebach, B.C.M.

    2014-01-01

    The focus of this thesis is evaluations of clinicians’ teaching performance in postgraduate medical education in the Netherlands. More specifically we studied formative evaluations, which clinicians use to generate a critical appraisal of their performance for their personal development. Research

  7. Performance SNAPSHOT Reports

    Data.gov (United States)

    Department of Housing and Urban Development — The HOME Program Performance SNAPSHOTs are quarterly cumulative performance reports, which can be useful in tracking the HOME program progress of participating...

  8. HOPWA Performance Profiles

    Data.gov (United States)

    Department of Housing and Urban Development — HOPWA Performance Profiles are generated quarterly for all agencies receiving HOPWA formula or competitive grants. Performance Profiles are available at the national...

  9. Dan Performer Mei Lanfang

    DEFF Research Database (Denmark)

    Risum, Janne

    2010-01-01

    The convention of performing female characters (dan characters) in Beijing opera, as practised by its most prominent male performer of female characters Mei Lanfang, and its and his cultural context and aesthetic aim...

  10. Setting Asset Performance Targets

    NARCIS (Netherlands)

    Green, D.; Hodkiewicz, M.; Masschelein, S.; Schoenmaker, R.; Muruvan, S.

    2015-01-01

    Setting targets is a common way for organisations to establish performance expectations. However the validity of targets is challenged when performance is influenced by factors beyond the control of the manager. This project examines the issue of target setting for a single asset performance measure

  11. Extending Critical Performativity

    DEFF Research Database (Denmark)

    Spicer, André; Alvesson, Mats; Kärreman, Dan

    2016-01-01

    In this article we extend the debate about critical performativity. We begin by outlining the basic tenets of critical performativity and how this has been applied in the study of management and organization. We then address recent critiques of critical performance. We note these arguments suffer...

  12. Performative Work in Tourism

    DEFF Research Database (Denmark)

    Bærenholdt, Jørgen Ole; Jensen, Hanne Louise

    2009-01-01

    performative work. For many workers, the performative aspect has contributed to their personal development, especially where self-control at work contributes to enhancing self-esteem. Second, performative work is also often vulnerable, involving various emotional strategies to cope with its challenges. While...

  13. Danish mutual fund performance

    DEFF Research Database (Denmark)

    Christensen, Michael

    2013-01-01

    This article provides the first independent performance analysis of Danish mutual funds. We analyse selectivity and market timing abilities for 71 mutual funds that have been in operation from 2001 to 2010. The results show great fund performance diversity. Half the funds have performed neutrally...

  14. Seven Performance Drivers.

    Science.gov (United States)

    Ross, Linda

    2003-01-01

    Recent work with automotive e-commerce clients led to the development of a performance analysis methodology called the Seven Performance Drivers, including: standards, incentives, capacity, knowledge and skill, measurement, feedback, and analysis. This methodology has been highly effective in introducing and implementing performance improvement.…

  15. Performing Narrative Medicine

    Science.gov (United States)

    Langellier, Kristin M.

    2009-01-01

    In this article, the author weaves narrative medicine and performance together to consider what might it mean to call narrative medicine a performance. To name narrative medicine as performance is to recognize the texts and bodies, the stories and selves, that participate in its practice--patients' and physicians' embodied stories as well as the…

  16. NU Performance/NO Performance? / Keiu Virro

    Index Scriptorium Estoniae

    Virro, Keiu, 1987-

    2009-01-01

    3. "NU Performance'i" festivalist "Recycle Pop" Kanuti gildis 11.-14. novembrini 2009. Kuraatorid Anders Härm ja Priit Raud. Erkki Luugi, Lotte Jürjendali ja Katrin Ratte, Kiwa, Andres Lõo ning ExTRAfINE ehk Marko Laimre, Kati Ilvese, Killu Sukmiti ja Raul Kelleri esinemisest

  17. Performance in Public Organizations

    DEFF Research Database (Denmark)

    Andersen, Lotte Bøgh; Boesen, Andreas; Pedersen, Lene Holm

    2016-01-01

    Performance in public organizations is a key concept that requires clarification. Based on a conceptual review of research published in 10 public administration journals, this article proposes six distinctions to describe the systematic differences in performance criteria: From which stakeholder...... of management and performance are classified. The results illustrate how a systematization of the conceptual space of performance in public organizations can help researchers select what to study and what to leave out with greater accuracy while also bringing greater clarity to public debates about performance....

  18. Performer rights and responsibilities in historical performance

    Directory of Open Access Journals (Sweden)

    Irving John

    2014-01-01

    Full Text Available In April 2014, fortepianist and Mozart specialist John Irving recorded a CD of solo keyboard sonatas by Joseph Haydn, using a modern copy of a Viennese fortepiano of Haydn’s era. This is an account of the project written from the performer’s perspective, examining some relevant issues of historical performance practice, organology, and detailed reflections upon the performer’s preparations (of various musical and technical kinds for the recording.

  19. Performance tuning for high performance computing systems

    OpenAIRE

    Pahuja, Himanshu

    2017-01-01

    A Distributed System is composed by integration between loosely coupled software components and the underlying hardware resources that can be distributed over the standard internet framework. High Performance Computing used to involve utilization of supercomputers which could churn a lot of computing power to process massively complex computational tasks, but is now evolving across distributed systems, thereby having the ability to utilize geographically distributed computing resources. We...

  20. Developing Human Performance Measures

    Energy Technology Data Exchange (ETDEWEB)

    Jeffrey Joe; Bruce Hallbert; Larry Blackwood; Donald Dudehoeffer; Kent Hansen

    2006-05-01

    Through the reactor oversight process (ROP), the U.S. Nuclear Regulatory Commission (NRC) monitors the performance of utilities licensed to operate nuclear power plants. The process is designed to assure public health and safety by providing reasonable assurance that licensees are meeting the cornerstones of safety and designated crosscutting elements. The reactor inspection program, together with performance indicators (PIs), and enforcement activities form the basis for the NRC’s risk-informed, performance based regulatory framework. While human performance is a key component in the safe operation of nuclear power plants and is a designated cross-cutting element of the ROP, there is currently no direct inspection or performance indicator for assessing human performance. Rather, when human performance is identified as a substantive cross cutting element in any 1 of 3 categories (resources, organizational or personnel), it is then evaluated for common themes to determine if follow-up actions are warranted. However, variability in human performance occurs from day to day, across activities that vary in complexity, and workgroups, contributing to the uncertainty in the outcomes of performance. While some variability in human performance may be random, much of the variability may be attributed to factors that are not currently assessed. There is a need to identify and assess aspects of human performance that relate to plant safety and to develop measures that can be used to successfully assure licensee performance and indicate when additional investigation may be required. This paper presents research that establishes a technical basis for developing human performance measures. In particular, we discuss: 1) how historical data already gives some indication of connection between human performance and overall plant performance, 2) how industry led efforts to measure and model human performance and organizational factors could serve as a data source and basis for a

  1. Untangling Performance from Success

    CERN Document Server

    Yucesoy, Burcu

    2015-01-01

    Fame, popularity and celebrity status, frequently used tokens of success, are often loosely related to, or even divorced from professional performance. This dichotomy is partly rooted in the difficulty to distinguish performance, an individual measure that captures the actions of a performer, from success, a collective measure that captures a community's reactions to these actions. Yet, finding the relationship between the two measures is essential for all areas that aim to objectively reward excellence, from science to business. Here we quantify the relationship between performance and success by focusing on tennis, an individual sport where the two quantities can be independently measured. We show that a predictive model, relying only on a tennis player's performance in tournaments, can accurately predict an athlete's popularity, both during a player's active years and after retirement. Hence the model establishes a direct link between performance and momentary popularity. The agreement between the performa...

  2. Sound perception, performance

    CERN Document Server

    2013-01-01

    Musical Performance covers many aspects like Musical Acoustics, Music Psychology, or motor and prosodic actions. It deals with basic concepts of the origin or music and its evolution, ranges over neurocognitive foundations, and covers computational, technological, or simulation solutions. This volume gives an overview about current research in the foundation of musical performance studies on all these levels. Recent concepts of synchronized systems, evolutionary concepts, basic understanding of performance as Gestalt patterns, theories of chill as performance goals or historical aspects are covered. The neurocognitive basis of motor action in terms of music, musical syntax, as well as therapeutic aspects are discussed. State-of-the-art applications in performance realizations, like virtual room acoustics, virtual musicians, new concepts of real-time physical modeling using complex performance data as input or sensor and gesture studies with soft- and hardware solutions are presented. So although the field is ...

  3. EFFECT OF LOW-TEMPERATURE HYGROTHERMAL PROCESSING ON FORMS OF ASSOCIATION OF MOISTURE IN RICE-VEGETABLE MIXTURE WITH HYDROBIONTS

    Directory of Open Access Journals (Sweden)

    N. S. Rodionova

    2014-01-01

    Full Text Available Summary. In the catering industry common combination of rice, vegetable raw materials: onion and carrot, and aquatic organisms: fish, squid, which allows you to get a dish with high consumer properties. The article investigated the influence of the amount of water introduced by the ratio of free and bound moisture in food samples obtained using the low temperature thermo-humidity treatment, compared with the control. Found that for all drawing and vegetable mixture with squid, adding water in an amount exceeding 12.0 % of the total weight of the meal increases the mass fraction of free moisture. For rice-vegetable mixture with carp introduction of additional water is not recommended, since the introduction of water even in the amount of 5 % of the total weight of the meal increases the mass fraction of free moisture. The data indicate that the use of low-temperature thermal treatment of the samples humid pre vacuum packaging technology helps to reduce finished product weight loss, due to the amount of free moisture conservation while increasing the mass of bound water that helps to ensure better consistency of the final product, increase the shelf life and exit semis.

  4. An investigation in the hygrothermal degradation of an E-glass/vinyl-ester composite in humid and immersion environments

    Science.gov (United States)

    Svetlik, Stephanie Laura

    The main goal of this research is to gain a fundamental understanding of the synergistic mechanisms of degradation for a model E-glass/vinyl-ester composite exposed to humid environments and to compare them to the mechanisms of degradation resulting from water immersion. Moisture sorption kinetics are assessed in terms of structural modification diffusion in order to understand how water sorption phenomena and leaching of low molecular weight species may be responsible for changes in material properties. Plasticization is identified using dynamic mechanical thermal analysis (DMTA) and is correlated to reversible degradation of the longitudinal tensile strength and short beam shear (SBS) strength. Tensile strength is also seen to decrease as a result of minimally reversible interfacial degradation, also identified through DMTA and SBS testing. Exposure to 18%RH and 50%RH results in material properties which remain within initial scatter except where increases in the glass transition temperature and SBS strength indicate matrix dominated strengthening also identified in material exposed to 99%RH and immersion at elevated temperatures. Tensile, SBS, and DMTA results all reveal degradation of the fiber resulting from exposure to high humidity and immersion environments at elevated temperatures. Scanning electron microscopy confirms the occurrence of interfacial debonding and fiber pitting. In material exposed to 80°C immersion, pitting of the fiber surface was identified at sites adjacent to kaolin clay, a hydrophilic particulate filler commonly used as a lubricant in pultrusion. Predictive degradation models are applied to tensile strength, SBS strength, and tensile failure strain results for 99%RH and immersion exposures, where irreversible degradation occurred at elevated temperatures. Degradation resulting from exposure to 99%RH and immersion is found to be equivalent. Predictive models show significant scatter based on the inability to isolate specific mechanisms. Further work is indicated in this area to ensure that safety factors are appropriately selected.

  5. A Musicology of Performance

    OpenAIRE

    Fabian, Dorottya

    2017-01-01

    This book examines the nature of musical performance. In it, Dorottya Fabian explores the contributions and limitations of some of these approaches to performance, be they theoretical, cultural, historical, perceptual, or analytical. Through a detailed investigation of recent recordings of J. S. Bach's Six Sonatas and Partitas for Solo Violin, she demonstrates that music performance functions as a complex dynamical system. Only by crossing disciplinary boundaries, therefore, can we put the au...

  6. Performance Analysis of MYSEA

    Science.gov (United States)

    2012-09-01

    Services FSD Federated Services Daemon I&A Identification and Authentication IKE Internet Key Exchange KPI Key Performance Indicator LAN Local Area...spection takes place in different processes in the server architecture. Key Performance Indica- tor ( KPI )s associated with the system need to be...application and risk analysis of security controls. Thus, measurement of the KPIs is needed before an informed tradeoff between the performance penalties

  7. Performing hyper-masculinity

    DEFF Research Database (Denmark)

    Bengtsson, Tea Torbenfeldt

    2016-01-01

    In this article, young people’s hypermasculine performances of gender in a Danish institution for young offenders are analyzed. Through the ethnographic method of detailed observations of two situations of young people, one male and one female, entering an institution for young offenders, it is d...... hypermasculine frame comprises notions of a real man based on performances of overt sexuality, the willingness to commit violence, and the limitation of subversive performances....

  8. Photovoltaic array performance model.

    Energy Technology Data Exchange (ETDEWEB)

    Kratochvil, Jay A.; Boyson, William Earl; King, David L.

    2004-08-01

    This document summarizes the equations and applications associated with the photovoltaic array performance model developed at Sandia National Laboratories over the last twelve years. Electrical, thermal, and optical characteristics for photovoltaic modules are included in the model, and the model is designed to use hourly solar resource and meteorological data. The versatility and accuracy of the model has been validated for flat-plate modules (all technologies) and for concentrator modules, as well as for large arrays of modules. Applications include system design and sizing, 'translation' of field performance measurements to standard reporting conditions, system performance optimization, and real-time comparison of measured versus expected system performance.

  9. Malawi - Threshold Performance Evaluation

    Data.gov (United States)

    Millennium Challenge Corporation — This ex post performance evaluation was carried out to provide an independent, objective investigation into the effectiveness and efficacy of MTP activities, using...

  10. COGNITIVE PERFORMANCE LABORATORY

    Data.gov (United States)

    Federal Laboratory Consortium — This laboratory conducts basic and applied human research studies to characterize cognitive performance as influenced by militarily-relevant contextual and physical...

  11. Performing "the Other"

    DEFF Research Database (Denmark)

    Riis, Helle Bach

    2013-01-01

    A group of youngsters perform their self-composed rap lyrics on stage in the Betty Nansen Theater in Copenhagen. The theater claims, that the performance portraits the youngsters as they truly are – as opposed to the medias portrayal. The play is part of an integration project, co-financed by the......-financed by the Danish Ministry of Integration. This essay presents a critical analysis of the representation of the youngsters on stage. The analysis is especially based on the concepts of performance and performativity and on hip-hop as a genre framework for the representation....

  12. Phospholipids and sports performance

    National Research Council Canada - National Science Library

    Jäger, Ralf; Purpura, Martin; Kingsley, Michael

    2007-01-01

    .... The participation in physical activity often challenges a variety of physiological systems; consequently, the ability to maintain normal cellular function during activity can determine sporting performance...

  13. Performance of Patenting Firms

    DEFF Research Database (Denmark)

    Madsen, Erik Strøjer; Smith, Valdemar; Nielsen, Anders Østergaard

    2000-01-01

    Most countries focus on industries with high technology and the governments grant subsidies to innovating firms. However, there has been remarkable few studies of the performance of innovative firms or industries. This study examines the performance of patent active firms compared to the non......-patenting firms within the manufacturing sector in Denmark. Performance is measured both by growth in employment as well as in the return on equity and profit share in turnover. The results suggest that differences in performance of patenting and non-patenting firms are very small, which questions the political...

  14. Benchmarking and Performance Management

    Directory of Open Access Journals (Sweden)

    Adrian TANTAU

    2010-12-01

    Full Text Available The relevance of the chosen topic is explained by the meaning of the firm efficiency concept - the firm efficiency means the revealed performance (how well the firm performs in the actual market environment given the basic characteristics of the firms and their markets that are expected to drive their profitability (firm size, market power etc.. This complex and relative performance could be due to such things as product innovation, management quality, work organization, some other factors can be a cause even if they are not directly observed by the researcher. The critical need for the management individuals/group to continuously improve their firm/company’s efficiency and effectiveness, the need for the managers to know which are the success factors and the competitiveness determinants determine consequently, what performance measures are most critical in determining their firm’s overall success. Benchmarking, when done properly, can accurately identify both successful companies and the underlying reasons for their success. Innovation and benchmarking firm level performance are critical interdependent activities. Firm level variables, used to infer performance, are often interdependent due to operational reasons. Hence, the managers need to take the dependencies among these variables into account when forecasting and benchmarking performance. This paper studies firm level performance using financial ratio and other type of profitability measures. It uses econometric models to describe and then propose a method to forecast and benchmark performance.

  15. Public Sector Performance

    NARCIS (Netherlands)

    B. Kuhry

    2004-01-01

    The performance of the public sector of national economies is a crucial factor in the race to achieve the goals in the Lisbon Agenda. It is therefore useful to relate differences in performance in education, health care, law and order, and public administration to differences in resource use and

  16. Performing Belonging, celebrating invisibility?

    DEFF Research Database (Denmark)

    Juul, Kristine

    2014-01-01

    Serbian migrants living transnational lives consciously or unconsciously move between visibility and invisibility in their performance of migrant success stories. A case in point are public festivals, performed to make visible migrants’ successful inclusion in Danish society, i.e. celebrating...

  17. Technology Performance Exchange

    Energy Technology Data Exchange (ETDEWEB)

    2015-09-01

    To address the need for accessible, high-quality data, the Department of Energy has developed the Technology Performance Exchange (TPEx). TPEx enables technology suppliers, third-party testing laboratories, and other entities to share product performance data. These data are automatically transformed into a format that technology evaluators can easily use in their energy modeling assessments to inform procurement decisions.

  18. Untangling Performance from Success

    Science.gov (United States)

    Yucesoy, Burcu; Barabasi, Albert-Laszlo

    Fame, popularity and celebrity status, frequently used tokens of success, are often loosely related to, or even divorced from professional performance. This dichotomy is partly rooted in the difficulty to distinguish performance, an individual measure that captures the actions of a performer, from success, a collective measure that captures a community's reactions to these actions. Yet, finding the relationship between the two measures is essential for all areas that aim to objectively reward excellence, from science to business. Here we quantify the relationship between performance and success by focusing on tennis, an individual sport where the two quantities can be independently measured. We show that a predictive model, relying only on a tennis player's performance in tournaments, can accurately predict an athlete's popularity, both during a player's active years and after retirement. Hence the model establishes a direct link between performance and momentary popularity. The agreement between the performance-driven and observed popularity suggests that in most areas of human achievement exceptional visibility may be rooted in detectable performance measures. This research was supported by Air Force Office of Scientific Research (AFOSR) under agreement FA9550-15-1-0077.

  19. Tourism, performance, and place

    DEFF Research Database (Denmark)

    Bærenholdt, Jørgen Ole

    2016-01-01

    'Tourism, performance, and place: a geographic perspective' by Jillian M. Rickly- Boyd, Daniel C. Knudsen, Lisa C. Braverman and Michelle M. Metro-Roland, Farnham, England/Burlington, VT, Ashgate, 2014......'Tourism, performance, and place: a geographic perspective' by Jillian M. Rickly- Boyd, Daniel C. Knudsen, Lisa C. Braverman and Michelle M. Metro-Roland, Farnham, England/Burlington, VT, Ashgate, 2014...

  20. Key performance indicators

    NARCIS (Netherlands)

    Zwetsloot, G.I.J.M.

    2014-01-01

    This paper addresses how organisations can use OSH performance indicators. This is an important way to mainstream OSH into business management. Key performance indicators (KPIs) should provide objective data on the OSH situation. It is often said that ‘what gets measured gets managed’. Without

  1. Profiling Vendor Performance.

    Science.gov (United States)

    Bracken, James K.; Calhoun, John C.

    1984-01-01

    Results of performance evaluation of vendor supplying library materials to Knox College Library indicate that, despite vendor's claims for comprehensiveness of stock, only 40-50 percent of orders could be filled from stock, and performance with regard to both subjects and publishers varied as much as 50 percent. Nine references are cited. (EJS)

  2. Managing employee performance.

    Science.gov (United States)

    McConnell, Charles R

    2004-01-01

    Performance management consists of significantly more than periodic evaluation of performance. It is the art and science of dealing with employees in a manner intended to positively influence their thinking and behavior to achieve a desired level of performance. It is essential for the manager to always model positive behavior concerning performance; what one does or says as a manager always has an influence on others. The kinds of employee behavior most likely encountered relative to performance management efforts stem from resistance to change and lack of complete understanding of what is expected. Employee participation must be elicited whenever possible for performance improvement; as far as the inner working details of a specific job are concerned, there is no one who knows the job better than the person who does it everyday. For each task to be done, an employee needs to know what output is expected, how this output will be measured, and what standards are applied in assessing the output. Managing employee performance requires ongoing contact with each employee, regular feedback, and whatever coaching, counseling, and training are necessary to bring an employee back on track when a problem appears. Sustaining efficient and effective employee performance requires the manager's ongoing attention and involvement.

  3. Professional performance in school

    Directory of Open Access Journals (Sweden)

    Rubio, J. F.

    2012-01-01

    Full Text Available Professional performance in education is now calling the attention of researcher due to its role in the professionalizing process intended to increase international education standards. In this article the term professional performance is examined from the two socio-historic traditional roles involved in training the individuals as a bio-psychic and social entity: teachers and executive. By means of scientific methods, the author gives the theoretical grounds connecting professional performance, learning and individual capacity of using them in solving problem at his labor position. The professional performance is regarded as a human value that stimulates the activity. By predicting educational alternatives, the paper portraits a model of professional performance in education, referring the necessary actions needed for achieving the goals of education. Searching and discussing such alternatives leads to reinterpret professional problems and to find out ways of improving educational standards.

  4. Gazes and Performances

    DEFF Research Database (Denmark)

    Larsen, Jonas

    ethnographic studies I spell out the embodied, hybridised, mobile and performative nature of tourist gazing especially with regard to tourist photography. The talk draws on my recent book Tourism, Performance and the Everyday: Consuming the Orient (Routledge, 2009, With M. Haldrup) and the substantially......Abstract: Recent literature has critiqued this notion of the 'tourist gaze' for reducing tourism to visual experiences 'sightseeing' and neglecting other senses and bodily experiences of doing tourism. A so-called 'performance turn' within tourist studies highlights how tourists experience places...... in more multi-sensuous ways, touching, tasting, smelling, hearing and so on, as well as the materiality of objects and not just objects as signs. With inspiration from Goffman's dramaturgical sociology and Nigel Thrift's non-representational theory, the performance turn employs performative metaphors...

  5. Listening to Musical Performers

    Directory of Open Access Journals (Sweden)

    Aron Edidin

    2016-01-01

    Full Text Available In the philosophy of music and in musicology, apart from ethnomusicology, there is a long tradition of focus on musical compositions as objects of inquiry. But in both disciplines, a body of recent work focuses on the place of performance in the making of music. Most of this work, however, still takes for granted that compositions, at least in Western art music, are the primary objects of aesthetic attention. In this paper I focus on aesthetic attention to the performing activity itself. I begin by roughly characterizing what is involved in attending to the performing activity of musical performers. I then argue that such attention is essential to the full appreciation of the central compositions of the Western art music canon. Finally, I argue that, often enough, recordings provide a suitable vehicle for this sort of attention; listeners to recordings can use them to listen to musical performance.

  6. Music and academic performance.

    Science.gov (United States)

    Arnaud Cabanac; Perlovsky, Leonid; Bonniot-Cabanac, Marie-Claude; Cabanac, Michel

    2013-11-01

    In a previous study we demonstrated that listening to a pleasant music while performing an academic test helped students to overcome stress, to devote more time to more stressful and more complicated task and the grades were higher. Yet, there remained ambiguities as for the causes of the higher test performance of these students: do they perform better because they hear music during their examinations, or would they perform better anyway because they are more gifted/motivated? This motivated the current study as a preliminary step toward that general question: Do students who like/perform music have better grades than the others? Our results confirmed this hypothesis: students studying music have better grades in all subjects. Copyright © 2013 Elsevier B.V. All rights reserved.

  7. High Performance Marine Vessels

    CERN Document Server

    Yun, Liang

    2012-01-01

    High Performance Marine Vessels (HPMVs) range from the Fast Ferries to the latest high speed Navy Craft, including competition power boats and hydroplanes, hydrofoils, hovercraft, catamarans and other multi-hull craft. High Performance Marine Vessels covers the main concepts of HPMVs and discusses historical background, design features, services that have been successful and not so successful, and some sample data of the range of HPMVs to date. Included is a comparison of all HPMVs craft and the differences between them and descriptions of performance (hydrodynamics and aerodynamics). Readers will find a comprehensive overview of the design, development and building of HPMVs. In summary, this book: Focuses on technology at the aero-marine interface Covers the full range of high performance marine vessel concepts Explains the historical development of various HPMVs Discusses ferries, racing and pleasure craft, as well as utility and military missions High Performance Marine Vessels is an ideal book for student...

  8. Performance Monitoring of Ships

    DEFF Research Database (Denmark)

    Hansen, Søren Vinther

    to the environment. The monitoring of the ship’s performance can be used as decision support in determining when actions to improve performance should be taken. The performance evaluation is based on a model of the ship and the added resistance from wind and waves during operation. Logged data on board the ship...... is used as input to the system and by comparing model and ship behaviour, an index describing the ship’s performance is generated. The work in this thesis is based on data logged through the automation system on board a PostPanmax container ship where data have been logged through a year. A routine...... handling drift in time series, spikes and outliers have been suggested for the purpose of introducing an automatic logging system. The performance system is modelled in software based on the Bond Graph method. The system is described by bond graph elements which describe the characteristics of each...

  9. Caffeine and Performance.

    Science.gov (United States)

    Yarnell, Angela M; Deuster, Patricia A

    The role of caffeine in enhancing performance has been studied for years, and there is no doubt that caffeine can be performance enhancing. Also, a wealth of information allows for an interesting distinction between physical and cognitive performance. Most adults in America consume moderate doses of caffeine in various forms on a daily basis as caffeine is typically found in coffee, tea, soft drinks, dietary supplements, energy drinks, energy shots, and chocolate, as well as over-the-counter pills and gums. Although caffeine is readily available and widely consumed, when using it to enhance performance, a few factors should be considered. The authors discuss caffeine use among Servicemembers, its properties and effects on physical and cognitive performance, how to use it to optimize performance, and, finally, some of safety and regulatory considerations. The bottom line is that all individuals do not respond the same way to caffeine and their response depends on how the body uses and breaks down caffeine. Thus, as a user, you should monitor your own responses and performance changes when using caffeine based on the general recommendations provided. 2016.

  10. Performing rurality. But who?

    Directory of Open Access Journals (Sweden)

    Dymitrow Mirek

    2017-12-01

    Full Text Available Reflective inquiries to better understand ‘the rural’ have tried to embed rural research within the notion of performativity. Performativity assumes that the capacity of language is not simply to communicate but also to consummate action, whereupon citational uses of concepts produce a series of material effects. Of late, this philosophical shift has also implicated geographers as active agents in producing, reproducing and performing rurality. This paper provides a critical evaluation of what this new insistence really means for the production of geographical knowledge. Using framework analysis as a method, the paper scrutinizes several reportedly influential papers on the topic of rural performativity. Our findings reveal that, while indeed reflexive on issues of academic integrity, methodology and ethics, performances of rurality are continuedly placed ‘out there’ amongst ‘rural people’, i.e. in a priori defined and often stereotypically understood contexts, either by way of ‘spatial delimitation’ or ‘activity delimitation’. Effectively, such testimonies provide a truncated state of fidelity, where performance- oriented reflexivity is seconded by contradictory empirics of uneven value and with few commonalities. We conclude that by turning towards performativity as an allegedly more helpful way of obtaining rural coherence, we at the same time overlook our own role in keeping ‘rural theory’ alive.

  11. Java performance tuning

    CERN Document Server

    Shirazi, Jack

    2003-01-01

    Performance has been an important issue for Java developers ever since the first version hit the streets. Over the years, Java performance has improved dramatically, but tuning is essential to get the best results, especially for J2EE applications. You can never have code that runs too fast. Java Peformance Tuning, 2nd edition provides a comprehensive and indispensable guide to eliminating all types of performance problems. Using many real-life examples to work through the tuning process in detail, JPT shows how tricks such as minimizing object creation and replacing strings with arrays can

  12. Performance expectation plan

    Energy Technology Data Exchange (ETDEWEB)

    Ray, P.E.

    1998-09-04

    This document outlines the significant accomplishments of fiscal year 1998 for the Tank Waste Remediation System (TWRS) Project Hanford Management Contract (PHMC) team. Opportunities for improvement to better meet some performance expectations have been identified. The PHMC has performed at an excellent level in administration of leadership, planning, and technical direction. The contractor has met and made notable improvement of attaining customer satisfaction in mission execution. This document includes the team`s recommendation that the PHMC TWRS Performance Expectation Plan evaluation rating for fiscal year 1998 be an Excellent.

  13. Breakfast and performance.

    Science.gov (United States)

    Cueto, S

    2001-12-01

    Evidence suggests that the effect of fasting on performance is not uniform, but it is dependent on the basal nutritional status of the subject. Breakfast consumption has a short-term effect in improving selected learning skills, especially work memory. School breakfast programmes have a positive effect on the nutritional status of children, on school attendance and probably on dropout rates. The effect of breakfast consumption on school performance depends on the interaction between the programme, student characteristics (malnutrition) and school organisation. Unless the school setting guarantees a minimum quality standard, the benefits of breakfast consumption will not be evident in performance in complex areas like language or maths.

  14. Clojure high performance programming

    CERN Document Server

    Kumar, Shantanu

    2013-01-01

    This is a short, practical guide that will teach you everything you need to know to start writing high performance Clojure code.This book is ideal for intermediate Clojure developers who are looking to get a good grip on how to achieve optimum performance. You should already have some experience with Clojure and it would help if you already know a little bit of Java. Knowledge of performance analysis and engineering is not required. For hands-on practice, you should have access to Clojure REPL with Leiningen.

  15. Enhancing LAN performance

    CERN Document Server

    Held, Gilbert

    2004-01-01

    Enhancing LAN Performance, Fourth Edition explains how to connect geographically separated LANs with appropriate bandwidth, the issues to consider when weighing the use of multiport or dualport devices, how to estimate traffic for new networks, the effects of configuration changes on the performance of Ethernet and Token Ring networks, the design of switch-based networks that prevent traffic bottlenecks, and other critical topics. It provides the tools to address these issues in relation to specific network requirements. This volume develops mathematical models of various LAN performance issue

  16. PerformAge

    DEFF Research Database (Denmark)

    Fristrup, Tine

    2012-01-01

    are constituted as experts on aging. In the humanistic model of aging, the aging self becomes the expert on the process of becoming of age. Thi sconflicting aspect of the discursive battlefield on aging will be elaborated in the framework of PerformAge and understood as a temporal and spatial theorising of aging...... as a researcher perform age in the process of figuring the possible age performativities as subject positioning performativity (Judith Butler, 1995) in the social encounters and textualized in poetic representations. Inspired by the work on Reifungsromane (Barbara Frey Waxman, 1990), I do not want to paint......The accountability discourse made possible by the bio-power (Michel Foucault, 1976/1978:139)unfolds the different facets of the phenomenon of individual and societal aging as a new aging discourse represented by images of independence, social mobility, and agency (Stephen Katz ans Debbie Laliberte...

  17. Poor school performance.

    Science.gov (United States)

    Karande, Sunil; Kulkarni, Madhuri

    2005-11-01

    Education is one of the most important aspects of human resource development. Poor school performance not only results in the child having a low self-esteem, but also causes significant stress to the parents. There are many reasons for children to under perform at school, such as, medical problems, below average intelligence, specific learning disability, attention deficit hyperactivity disorder, emotional problems, poor socio-cultural home environment, psychiatric disorders and even environmental causes. The information provided by the parents, classroom teacher and school counselor about the child's academic difficulties guides the pediatrician to form an initial diagnosis. However, a multidisciplinary evaluation by an ophthalmologist, otolaryngologist, counselor, clinical psychologist, special educator, and child psychiatrist is usually necessary before making the final diagnosis. It is important to find the reason(s) for a child's poor school performance and come up with a treatment plan early so that the child can perform up to full potential.

  18. Prognostics Performance Evaluation

    Data.gov (United States)

    National Aeronautics and Space Administration — This is the first version of the performance evaluation tool. Evaluation is based on point estimates of the RUL predictions. a more detailed documentation will be...

  19. FINANCIAL PERFORMANCES MEASUREMENT TOOLS

    National Research Council Canada - National Science Library

    BÎRCĂ ALIONA

    2016-01-01

    ... of objectives in line with the strategic policies of the entity. Measuring the financial performance without considering the strategic, tactical and operational objectives does not provide a real situation...

  20. Strategic sustainability performance plan

    Science.gov (United States)

    2010-06-01

    In October 2009, President Obama signed Executive Order (EO) 13514 that sets sustainability : goals for Federal agencies and focuses on making improvements in environmental, energy and : economic performance. The Executive Order requires Federal agen...

  1. Fishery Performance Indicators

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Performance indicators for landings, effort, revenue and distribution of revenue are collected for various fisheries nation-wide. The fisheries include catch and...

  2. Performance effect of Lean

    DEFF Research Database (Denmark)

    Kristensen, Thomas Borup; Israelsen, Poul

    2016-01-01

    of decision rights. The paper provides evidence that supports the view that middle managers’ actions further enhance performance in Lean companies. The right Lean behavior by middle managers increases the level of analytical continuous improvement empowerment. In total, high-performing Lean companies......To understand how the practices of Lean affect performance, we tested and validated a system-wide approach using mediating relationships in a structural equation model. We used a cross-sectional survey of 200 Danish companies that indicated that they used Lean. Thus, this study is especially...... relevant to Denmark, but the approach is empirically more generalizable. We show that the effect of Lean standardized flow production practices on performance is mediated by analytical continuous improvement empowerment practices and by delegation of decision rights practices. Thus, standardized flow...

  3. Poor school performance

    National Research Council Canada - National Science Library

    Karande, Sunil; Kulkarni, Madhuri

    2005-01-01

    Education is one of the most important aspects of human resource development. Poor school performance not only results in the child having a low self-esteem, but also causes significant stress to the parents...

  4. Teachers Performing Professionalism

    Directory of Open Access Journals (Sweden)

    Terri Bourke

    2013-10-01

    Full Text Available Faced with the perceived need to redefine education for more economic utilitarian purposes, as well as to encourage compliance with government policies, Australia, like many other Anglophone nations, has engaged in numerous policy shifts resulting in performativity practices becoming commonplace in the educational landscape. A series of interviews with teachers from Queensland, Australia, in which they revealed their experiences of professionalism are examined archaeologically to reveal how they enact their roles in response to this performative agenda. Findings suggest that while there is some acceptance among teachers of the performative discourse, there is increasing resistance, which permits the construction of alternative or counter-discourses to the currently internationally pervasive performative climate.

  5. OLEM Performance Assessment Information

    Data.gov (United States)

    U.S. Environmental Protection Agency — This asset includes a variety of data sets that measure the performance of Office of Land and Emergency Management (OLEM) programs in support of the Office of the...

  6. Responsive design high performance

    CERN Document Server

    Els, Dewald

    2015-01-01

    This book is ideal for developers who have experience in developing websites or possess minor knowledge of how responsive websites work. No experience of high-level website development or performance tweaking is required.

  7. CHIPRA Performance Bonuses

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Childrens Health Insurance Program Reauthorization Act of 2009 (CHIPRA) established performance bonuses, giving states an incentive to support enrollment and...

  8. Performative Schizoid Method

    DEFF Research Database (Denmark)

    Svabo, Connie

    2016-01-01

    A performative schizoid method is developed as a method contribution to performance as research. The method is inspired by contemporary research in the human and social sciences urging experimentation and researcher engagement with creative and artistic practice. In the article, the method...... is presented and an example is provided of a first exploratory engagement with it. The method is used in a specific project Becoming Iris, making inquiry into arts-based knowledge creation during a three month visiting scholarship at a small, independent visual art academy. Using the performative schizoid...... method in Becoming Iris results in four audio-visual and performance-based productions, centered on an emergent theme of the scholartist as a bird in borrowed feathers. Interestingly, the moral lesson of the fable about the vain jackdaw, who dresses in borrowed peacock feathers and becomes a castout...

  9. Performing the Super Instrument

    DEFF Research Database (Denmark)

    Kallionpaa, Maria

    2016-01-01

    The genre of contemporary classical music has seen significant innovation and research related to new super, hyper, and hybrid instruments, which opens up a vast palette of expressive potential. An increasing number of composers, performers, instrument designers, engineers, and computer programmers...... have become interested in different ways of “supersizing” acoustic instruments in order to open up previously-unheard instrumental sounds. Super instruments vary a great deal but each has a transformative effect on the identity and performance practice of the performing musician. Furthermore, composers...... provides the performer extensive virtuoso capabilities in terms of instrumental range, harmony, timbre, or spatial, textural, acoustic, technical, or technological qualities. The discussion will be illustrated by a composition case study involving augmented musical instrument electromagnetic resonator...

  10. Dynamic Capabilities and Performance

    DEFF Research Database (Denmark)

    Wilden, Ralf; Gudergan, Siegfried P.; Nielsen, Bo Bernhard

    2013-01-01

    Dynamic capabilities are widely considered to incorporate those processes that enable organizations to sustain superior performance over time. In this paper, we argue theoretically and demonstrate empirically that these effects are contingent on organizational structure and the competitive...... intensity in the market. Results from partial least square structural equation modeling (PLS-SEM) analyses indicate that organic organizational structures facilitate the impact of dynamic capabilities on organizational performance. Furthermore, we find that the performance effects of dynamic capabilities...... are contingent on the competitive intensity faced by firms. Our findings demonstrate the performance effects of internal alignment between organizational structure and dynamic capabilities, as well as the external fit of dynamic capabilities with competitive intensity. We outline the advantages of PLS...

  11. Fostering oral presentation performance

    NARCIS (Netherlands)

    Ginkel, van Stan; Gulikers, Judith; Biemans, Harm; Mulder, Martin

    2017-01-01

    Previous research revealed significant differences in the effectiveness of various feedback sources for encouraging students’ oral presentation performance. While former studies emphasised the superiority of teacher feedback, it remains unclear whether the quality of feedback actually differs

  12. Measures of rowing performance.

    Science.gov (United States)

    Smith, T Brett; Hopkins, Will G

    2012-04-01

    Accurate measures of performance are important for assessing competitive athletes in practi~al and research settings. We present here a review of rowing performance measures, focusing on the errors in these measures and the implications for testing rowers. The yardstick for assessing error in a performance measure is the random variation (typical or standard error of measurement) in an elite athlete's competitive performance from race to race: ∼1.0% for time in 2000 m rowing events. There has been little research interest in on-water time trials for assessing rowing performance, owing to logistic difficulties and environmental perturbations in performance time with such tests. Mobile ergometry via instrumented oars or rowlocks should reduce these problems, but the associated errors have not yet been reported. Measurement of boat speed to monitor on-water training performance is common; one device based on global positioning system (GPS) technology contributes negligible extra random error (0.2%) in speed measured over 2000 m, but extra error is substantial (1-10%) with other GPS devices or with an impeller, especially over shorter distances. The problems with on-water testing have led to widespread use of the Concept II rowing ergometer. The standard error of the estimate of on-water 2000 m time predicted by 2000 m ergometer performance was 2.6% and 7.2% in two studies, reflecting different effects of skill, body mass and environment in on-water versus ergometer performance. However, well trained rowers have a typical error in performance time of only ∼0.5% between repeated 2000 m time trials on this ergometer, so such trials are suitable for tracking changes in physiological performance and factors affecting it. Many researchers have used the 2000 m ergometer performance time as a criterion to identify other predictors of rowing performance. Standard errors of the estimate vary widely between studies even for the same predictor, but the lowest

  13. Plasma contactor performance characterization

    Science.gov (United States)

    Wilbur, P.

    1986-01-01

    The plasma contactor performance is outlined. Some performance objectives are given including expellant compatibility, high electron production capability, high ion production capability, high reliability for starting and operation, passive emission control, switchover capability between ion/electron emission, low ion and electron energies, low system mass, and low expellant consumption rate. The basic elements of the hollow cathode are shown along with key features of the plasma source.

  14. Examples Performance Testing Templates.

    Energy Technology Data Exchange (ETDEWEB)

    Siple, Bud H. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2014-07-01

    The purpose of this Performance Testing Program Plan is to identify the process and phased approach that will be implemented at Site XYZ . The purpose of the testing program at Site XYZ is specifically designed to evaluate the effectiveness of systems that are employed at this site. This plan defines tasks to be accomplished to ensure that performance testing is conducted as effectively and efficiently as possible.

  15. Leadership and management performance.

    Science.gov (United States)

    Carter, Tony

    2009-01-01

    Of all the things managers perform to develop employees, many people believe the most important one is leadership. Leadership is defined as using skills, experience, and direction to help someone improve their performance. Leadership consists primarily of giving people feedback to reinforce what they do well while suggesting ways and means to improve. It implies that everybody can improve and it is hoped that everybody wants to get better at what they do.

  16. RAJA Performance Suite

    Energy Technology Data Exchange (ETDEWEB)

    2017-09-01

    The RAJA Performance Suite is designed to evaluate performance of the RAJA performance portability library on a wide variety of important high performance computing (HPC) algorithmic lulmels. These kernels assess compiler optimizations and various parallel programming model backends accessible through RAJA, such as OpenMP, CUDA, etc. The Initial version of the suite contains 25 computational kernels, each of which appears in 6 variants: Baseline SequcntiaJ, RAJA SequentiaJ, Baseline OpenMP, RAJA OpenMP, Baseline CUDA, RAJA CUDA. All variants of each kernel perform essentially the same mathematical operations and the loop body code for each kernel is identical across all variants. There are a few kernels, such as those that contain reduction operations, that require CUDA-specific coding for their CUDA variants. ActuaJ computer instructions executed and how they run in parallel differs depending on the parallel programming model backend used and which optimizations are perfonned by the compiler used to build the Perfonnance Suite executable. The Suite will be used primarily by RAJA developers to perform regular assessments of RAJA performance across a range of hardware platforms and compilers as RAJA features are being developed. It will also be used by LLNL hardware and software vendor panners for new defining requirements for future computing platform procurements and acceptance testing. In particular, the RAJA Performance Suite will be used for compiler acceptance testing of the upcoming CORAUSierra machine {initial LLNL delivery expected in late-2017/early 2018) and the CORAL-2 procurement. The Suite will aJso be used to generate concise source code reproducers of compiler and runtime issues we uncover so that we may provide them to relevant vendors to be fixed.

  17. Steering Performance, Tactical Vehicles

    Science.gov (United States)

    2015-07-29

    front and rear. h. Steering gear type (rack & pinion, recirculating ball, etc.). TOP 02-2-600 29 July 2015 6 i. Steering linkage type...TYPE Final 3. DATES COVERED (From - To) 4. TITLE AND SUBTITLE Test Operations Procedure ( TOP ) 02-2-600 Steering Performance, Tactical Vehicles...Colleran Road Aberdeen Proving Ground, MD 21005-5059 8. PERFORMING ORGANIZATION REPORT NUMBER TOP 02-2-600 9. SPONSORING/MONITORING AGENCY

  18. Politicisation of performance appraisals

    Directory of Open Access Journals (Sweden)

    Sonia Swanepoel

    2014-02-01

    Full Text Available Orientation: Employees are a source of competitive advantage for organisations and human resource management seek to promote employee efficiency. One of the tools organisations utilise to achieve this goal is performance appraisals.Research purpose: The purpose of this study was to investigate the weaknesses in performance appraisal and to determine whether it is politicised in the North West Department of Health and Social Development in South Africa.Motivation for study: Many organisations either ignore the existence of politics in the appraisal process or assume that its impact can be minimised if they refine their appraisal instruments. Executives admit that, in appraising others, they often intentionally avoid meeting the goal of accuracy in favour of achieving goals that have more to do with exercising discretion and maintaining departmental effectiveness. Ironically, these same executives lament that the appraisals they receive often do not accurately represent their abilities and performance (Gioia & Longenecker, 1994.Research approach, design and method: Self-administered questionnaires were used as a means of collecting data and analysis was done through the use of the Statistical Package for the Social Sciences (SPSS.Main findings: The results of the study showed that respondents believe that performance appraisals are highly politicised.Practical/managerial implications: If used effectively, performance appraisals may improve employee productivity and efficiency as well as motivation and performance. However, if performance appraisal is perceived as unfair and political, it can diminish rather than enhance employee attitudes and performance.Contribution: Amongst others, it is recommended that managers should consider separating assessment for development and assessment for rewards.

  19. Performance in Older Adults

    Directory of Open Access Journals (Sweden)

    David Predovan

    2012-01-01

    Full Text Available Growing evidence supports the use of physical training interventions to improve both physical and cognitive performances in healthy older adults. Few studies have examined the impact of aerobic exercise on Stroop task performance, a measure of executive functions. In the current 3-month aerobic training study, 50 older adults (mean age = 67.96 ± 6.25 years were randomly assigned to either a three-month physical training group or to a control group (waiting list. Training sessions were 3 times per week for 60 minutes. All participants completed pre- and post-test measures of cognitive performance using the modified Stroop task and physical performance (Rockport one-mile test. Compared to controls, the training group showed significant improvements in physical capacity (P<0.001 and enhanced Stroop performance, but only in the inhibition/switching condition (P<0.03. Furthermore, the increase in aerobic capacity induced by the training regimen correlated negatively with reaction time in the inhibition/switching condition of the Stroop task at posttest (r=−0.538; P=0.007. Importantly, the reported gains in cognitive performance were observed after only three months of physical training. Taken together, the results suggest that even short-term physical interventions can enhance older adults’ executive functions.

  20. Sleep and Athletic Performance.

    Science.gov (United States)

    Watson, Andrew M

    Sleep is an essential component of health and well-being, with significant impacts on physical development, emotional regulation, cognitive performance, and quality of life. Along with being an integral part of the recovery and adaptive process between bouts of exercise, accumulating evidence suggests that increased sleep duration and improved sleep quality in athletes are associated with improved performance and competitive success. In addition, better sleep may reduce the risk of both injury and illness in athletes, not only optimizing health but also potentially enhancing performance through increased participation in training. Despite this, most studies have found that athletes fail to obtain the recommended amount of sleep, threatening both performance and health. Athletes face a number of obstacles that can reduce the likelihood of obtaining proper sleep, such as training and competition schedules, travel, stress, academic demands, and overtraining. In addition, athletes have been found to demonstrate poor self-assessment of their sleep duration and quality. In light of this, athletes may require more careful monitoring and intervention to identify individuals at risk and promote proper sleep to improve both performance and overall health. This review attempts to highlight the recent literature regarding sleep issues in athletes, the effects of sleep on athletic performance, and interventions to enhance proper sleep in athletes.

  1. Phospholipids and sports performance

    Directory of Open Access Journals (Sweden)

    Purpura Martin

    2007-07-01

    Full Text Available Abstract Phospholipids are essential components of all biological membranes. Phosphatidylcholine (PC and Phosphatidylserine (PS are Phosphatidyl-phospholipids that are required for normal cellular structure and function. The participation in physical activity often challenges a variety of physiological systems; consequently, the ability to maintain normal cellular function during activity can determine sporting performance. The participation in prolonged intense exercise has been shown to reduce circulatory choline concentrations in some individuals. As choline is a pre-cursor to the neurotransmitter Acetylcholine, this finding has encouraged researchers to investigate the hypothesis that supplementation with PC (or choline salts could enhance sporting performance. Although the available data that evaluates the effects of PC supplementation on performance are equivocal, acute oral supplementation with PC (~0.2 g PC per kg body mass has been demonstrated to improve performance in a variety of sporting activities where exercise has depleted circulatory choline concentrations. Short term oral supplementation with soy-derived PS (S-PS has been reported to attenuate circulating cortisol concentrations, improve perceived well-being, and reduce perceived muscle soreness after exercise. More recently, short term oral supplementation (750 mg per day of S-PS for 10 days has been demonstrated to improve exercise capacity during high intensity cycling and tended to increase performance during intermittent running. Although more research is warranted to determine minimum dietary Phospholipid requirements for optimal sporting performance, these findings suggest that some participants might benefit from dietary interventions that increase the intakes of PC and PS.

  2. Compute Server Performance Results

    Science.gov (United States)

    Stockdale, I. E.; Barton, John; Woodrow, Thomas (Technical Monitor)

    1994-01-01

    Parallel-vector supercomputers have been the workhorses of high performance computing. As expectations of future computing needs have risen faster than projected vector supercomputer performance, much work has been done investigating the feasibility of using Massively Parallel Processor systems as supercomputers. An even more recent development is the availability of high performance workstations which have the potential, when clustered together, to replace parallel-vector systems. We present a systematic comparison of floating point performance and price-performance for various compute server systems. A suite of highly vectorized programs was run on systems including traditional vector systems such as the Cray C90, and RISC workstations such as the IBM RS/6000 590 and the SGI R8000. The C90 system delivers 460 million floating point operations per second (FLOPS), the highest single processor rate of any vendor. However, if the price-performance ration (PPR) is considered to be most important, then the IBM and SGI processors are superior to the C90 processors. Even without code tuning, the IBM and SGI PPR's of 260 and 220 FLOPS per dollar exceed the C90 PPR of 160 FLOPS per dollar when running our highly vectorized suite,

  3. Implementering & Performative Potentialer

    DEFF Research Database (Denmark)

    Damkjer, Annemarie

    This thesis investigates how technology is constituted as an object of implementation. Using the theoretical lens of actor-network theory the thesis investigates how the technology of performance management becomes a matter of implementation in the Danish Defence and how the technology of perform......This thesis investigates how technology is constituted as an object of implementation. Using the theoretical lens of actor-network theory the thesis investigates how the technology of performance management becomes a matter of implementation in the Danish Defence and how the technology...... of implementation through different forms of practice that perform the technology as a project. Practices that arrange ideas on performance management in stories of change. This marks the contents of the technology, forms its vocabulary and makes possible the technology’s allocation of resources and movement across...... challenge the traditional models of implementation. It is suggested, that we view implementation practices as performative in relation to the co-configuration of technology and organizational practices and that both the co-configurative perspective and the materiality of implementation practices is included...

  4. Repository performance confirmation.

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, Francis D.

    2011-09-01

    Repository performance confirmation links the technical bases of repository science and societal acceptance. This paper explores the myriad aspects of what has been labeled performance confirmation in U.S. programs, which involves monitoring as a collection of distinct activities combining technical and social significance in radioactive waste management. This paper is divided into four parts: (1) A distinction is drawn between performance confirmation monitoring and other testing and monitoring objectives; (2) A case study illustrates confirmation activities integrated within a long-term testing and monitoring strategy for Yucca Mountain; (3) A case study reviews compliance monitoring developed and implemented for the Waste Isolation Pilot Plant; and (4) An approach for developing, evaluating and implementing the next generation of performance confirmation monitoring is presented. International interest in repository monitoring is exhibited by the European Commission Seventh Framework Programme 'Monitoring Developments for Safe Repository Operation and Staged Closure' (MoDeRn) Project. The MoDeRn partners are considering the role of monitoring in a phased approach to the geological disposal of radioactive waste. As repository plans advance in different countries, the need to consider monitoring strategies within a controlled framework has become more apparent. The MoDeRn project pulls together technical and societal experts to assimilate a common understanding of a process that could be followed to develop a monitoring program. A fundamental consideration is the differentiation of confirmation monitoring from the many other testing and monitoring activities. Recently, the license application for Yucca Mountain provided a case study including a technical process for meeting regulatory requirements to confirm repository performance as well as considerations related to the preservation of retrievability. The performance confirmation plan developed as part

  5. Energy performance assessment methodology

    Energy Technology Data Exchange (ETDEWEB)

    Platzer, W.J. [Fraunhofer Inst. for Solar Energy Systems, Freiburg (Germany)

    2006-01-15

    The energy performance of buildings are intimately connected to the energy performance of building envelopes. The better we understand the relation between the quality of the envelope and the energy consumption of the building, the better we can improve both. We have to consider not only heating but all service energies related to the human comfort in the building, such as cooling, ventilation, lighting as well. The complexity coming from this embracing approach is not to be underestimated. It is less and less possible to realted simple characteristic performance indicators of building envelopes (such as the U-value) to the overall energy performance. On the one hand much more paramters (e.g. light transmittance) come into the picture we have to assess the product quality in a multidimensional world. Secondly buildings more and more have to work on a narrow optimum: For an old, badly insulated building all solar gains are useful for a high-performance building with very good insulation and heat recovery systems in the ventilation overheating becomes more likely. Thus we have to control the solar gains, and sometimes we need high gains, sometimes low ones. And thirdly we see that the technology within the building and the user patterns and interactions as well influence the performance of a building envelope. The aim of this project within IEA Task27 was to improve our knowledge on the complex situation and also to give a principal approach how to assess the performance of the building envelope. The participants have contributed to this aim not pretending that we have reached the end. (au)

  6. EVA Performance Prediction

    Science.gov (United States)

    Peacock, Brian; Maida, James; Rajulu, Sudhakar

    2004-01-01

    Astronaut physical performance capabilities in micro gravity EV A or on planetary surfaces when encumbered by a life support suit and debilitated by a long exposure to micro gravity will be less than unencumbered pre flight capabilities. The big question addressed by human factors engineers is: what can the astronaut be expected to do on EVA or when we arrive at a planetary surface? A second question is: what aids to performance will be needed to enhance the human physical capability? These questions are important for a number of reasons. First it is necessary to carry out accurate planning of human physical demands to ensure that time and energy critical tasks can be carried out with confidence. Second it is important that the crew members (and their ground or planetary base monitors) have a realistic picture of their own capabilities, as excessive fatigue can lead to catastrophic failure. Third it is important to design appropriate equipment to enhance human sensory capabilities, locomotion, materials handling and manipulation. The evidence from physiological research points to musculoskeletal, cardiovascular and neurovestibular degradation during long duration exposure to micro gravity . The evidence from the biomechanics laboratory (and the Neutral Buoyancy Laboratory) points to a reduction in range of motion, strength and stamina when encumbered by a pressurized suit. The evidence from a long history of EVAs is that crewmembers are indeed restricted in their physical capabilities. There is a wealth of evidence in the literature on the causes and effects of degraded human performance in the laboratory, in sports and athletics, in industry and in other physically demanding jobs. One approach to this challenge is through biomechanical and performance modeling. Such models must be based on thorough task analysis, reliable human performance data from controlled studies, and functional extrapolations validated in analog contexts. The task analyses currently carried

  7. High performance homes

    DEFF Research Database (Denmark)

    Beim, Anne; Vibæk, Kasper Sánchez

    2014-01-01

    . Consideration of all these factors is a precondition for a truly integrated practice and as this chapter demonstrates, innovative project delivery methods founded on the manufacturing of prefabricated buildings contribute to the production of high performance homes that are cost effective to construct, energy......Can prefabrication contribute to the development of high performance homes? To answer this question, this chapter defines high performance in more broadly inclusive terms, acknowledging the technical, architectural, social and economic conditions under which energy consumption and production occur...... efficient to operate and valuable for building communities. Herein discussed are two successful examples of low energy prefabricated housing projects built in Copenhagen Denmark, which embraced both the constraints and possibilities offered by prefabrication....

  8. NIF capsule performance modeling

    Directory of Open Access Journals (Sweden)

    Weber S.

    2013-11-01

    Full Text Available Post-shot modeling of NIF capsule implosions was performed in order to validate our physical and numerical models. Cryogenic layered target implosions and experiments with surrogate targets produce an abundance of capsule performance data including implosion velocity, remaining ablator mass, times of peak x-ray and neutron emission, core image size, core symmetry, neutron yield, and x-ray spectra. We have attempted to match the integrated data set with capsule-only simulations by adjusting the drive and other physics parameters within expected uncertainties. The simulations include interface roughness, time-dependent symmetry, and a model of mix. We were able to match many of the measured performance parameters for a selection of shots.

  9. ENTREPRENEURSHIP AND ECONOMIC PERFORMANCE

    Directory of Open Access Journals (Sweden)

    HORAŢIU ŞOIM

    2013-12-01

    Full Text Available The problems of wealth and economic performance are old but despite their importance we have not a final answer on them. Besides the standard production factors usually stresed when we analyze economic performance and growth, land, labor and capital, we approach institutions in general and entrepreneurial culture in particular. In this paper we analyze the relationship between entreprenurship, defined by many dimensions derived from the study „Entrepreneurship in the EU and beyond.” requested by European Comission to the Gallup Internaitional, and economic performance measured by GDP/capita. The results show that countries where there is a strong entrepreneurial culture that promote initiative, opportunity seeking, risk taking aare doing better in terms of development level and wealth. At the same time the countries where the entrepreneurs have a good image in society, and thus promote entrepreneurship, are doing beter than the other countries.

  10. Performing Digital Literature

    Directory of Open Access Journals (Sweden)

    Jerome Fletcher

    2015-11-01

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

  11. Expert status and performance.

    Directory of Open Access Journals (Sweden)

    Mark A Burgman

    Full Text Available Expert judgements are essential when time and resources are stretched or we face novel dilemmas requiring fast solutions. Good advice can save lives and large sums of money. Typically, experts are defined by their qualifications, track record and experience. The social expectation hypothesis argues that more highly regarded and more experienced experts will give better advice. We asked experts to predict how they will perform, and how their peers will perform, on sets of questions. The results indicate that the way experts regard each other is consistent, but unfortunately, ranks are a poor guide to actual performance. Expert advice will be more accurate if technical decisions routinely use broadly-defined expert groups, structured question protocols and feedback.

  12. Performative Urban Architecture

    DEFF Research Database (Denmark)

    Thomsen, Bo Stjerne; Jensen, Ole B.

    The paper explores how performative urban architecture can enhance community-making and public domain using socio-technical systems and digital technologies to constitute an urban reality. Digital medias developed for the web are now increasingly occupying the urban realm as a tool for navigating...... using sensor technologies opening up for new access considerations in architecture as well as the ability for a local environment to act as real-time sources of information and facilities. Starting from the NoRA pavilion for the 10th International Architecture Biennale in Venice the paper discusses...... couple relationships between architecture, humans and society. These performative relationships between digital and physical environments are seen as illustrative of the social production of space by performance and the creative production of identity. The paper reflects on the perspectives...

  13. Internationalization and Hotel Performance

    DEFF Research Database (Denmark)

    Assaf, Albert G.; Josiassen, Alexander; Oh, Haemon

    2016-01-01

    Few industries are as inherently international as the hotel industry. This article sets out to investigate the impact of internationalization on performance in the hotel industry. Building on the theory of organizational learning the authors test several hypotheses regarding the shape of the inte......Few industries are as inherently international as the hotel industry. This article sets out to investigate the impact of internationalization on performance in the hotel industry. Building on the theory of organizational learning the authors test several hypotheses regarding the shape...... of the internationalization–performance relationship as well as the impact of four moderating variables. In line with the research aim and the underlying dynamism of organizational learning theory, these hypotheses are tested using a dynamic Bayesian model. The results indicate that internationalization has a U-shaped impact...

  14. As vozes do performer

    OpenAIRE

    Sacramento, Ana

    2012-01-01

    A caracterização vocal da personagem, como qualquer outro processo de representação com características performativas, tem subjacente uma base técnica, que, neste caso particular, é construída a partir da manipulação da configuração do trato vocal, com recurso ao controle neuromuscular das estruturas anatómicas envolvidas. O processo permite ao performer, seja ele ator, cantor ou bailarino, elevada versatilidade e segurança na performance vocal.

  15. Performance y estudios culturales

    OpenAIRE

    Chawla, Devika; Ohio University

    2014-01-01

    A partir de la experiencia de dos trabajos doctorales y del contexto de análisis norteamericano esta conferencia muestra las raíces y avances de la investigación en performance. Para ello realiza un recorrido histórico que ofrece claridad sobre las influencias territoriales de esta práctica y los usos del término hoy en día. Igualmente define cinco áreas de estudio y seis usos del performance en el campo comunicativo. Y enfatiza que este tipo de experiencias pueden comprenderse como mecanismo...

  16. Improving SQL Server Perform

    Directory of Open Access Journals (Sweden)

    Nicolae MERCIOIU

    2010-01-01

    Full Text Available With the development of client server technology and multilayer architectures the systems ef-ficiency issue has been increasingly discussed. Lacking knowledge in optimization methods and tools offered by DBMS's, database administrators and developers of applications based on Microsoft technologies cannot optimally design and service performing systems. In this article we review the objectives that should be considered (in order to improve performance of SQL Server instances and we describe the techniques used to optimize queries. Also, we explain and illustrate the new optimization features offered by SQL Server 2008.

  17. Database principles programming performance

    CERN Document Server

    O'Neil, Patrick

    2014-01-01

    Database: Principles Programming Performance provides an introduction to the fundamental principles of database systems. This book focuses on database programming and the relationships between principles, programming, and performance.Organized into 10 chapters, this book begins with an overview of database design principles and presents a comprehensive introduction to the concepts used by a DBA. This text then provides grounding in many abstract concepts of the relational model. Other chapters introduce SQL, describing its capabilities and covering the statements and functions of the programmi

  18. Productivity and Performance Measurement

    DEFF Research Database (Denmark)

    Hald, Kim Sundtoft; Spring, Martin

    This study explores conceptually how performance measurement as discussed in the literature, enables or constrains the ability to manage and improve productivity. It uses an inter-disciplinary literature review to identify five areas of concern relating productivity accounting to the ability...... to improve productivity: “Productivity representation”; “productivity incentives”, “productivity intervention”; “productivity trade-off or synergy” and “productivity strategy and context”. The paper discusses these areas of concern and expands our knowledge of how productivity and performance measurement...

  19. El libro como performance

    Directory of Open Access Journals (Sweden)

    Craig Epplin

    2015-09-01

    Full Text Available The poetry community Estación Pringles carries out an intriguing dialogue with the book format. On the one hand, its performative approach to poetry would seem to exclude the possibility of seeing this medium as a model for the project. Nevertheless, in its dialogue with the poetic lineage begun by Stéphane Mallarmé, this artistic initiative proposes a concept of the book as performance. This orientation is evident, besides, in the print products of Estación Pringles.

  20. Network performance analysis

    CERN Document Server

    Bonald, Thomas

    2013-01-01

    The book presents some key mathematical tools for the performance analysis of communication networks and computer systems.Communication networks and computer systems have become extremely complex. The statistical resource sharing induced by the random behavior of users and the underlying protocols and algorithms may affect Quality of Service.This book introduces the main results of queuing theory that are useful for analyzing the performance of these systems. These mathematical tools are key to the development of robust dimensioning rules and engineering methods. A number of examples i

  1. LHCb Detector Performance

    CERN Document Server

    Aaij, Roel; Adinolfi, Marco; Affolder, Anthony; Ajaltouni, Ziad; Akar, Simon; Albrecht, Johannes; Alessio, Federico; Alexander, Michael; Ali, Suvayu; Alkhazov, Georgy; Alvarez Cartelle, Paula; Alves Jr, Antonio Augusto; Amato, Sandra; Amerio, Silvia; Amhis, Yasmine; An, Liupan; Anderlini, Lucio; Anderson, Jonathan; Andreassen, Rolf; Andreotti, Mirco; Andrews, Jason; Appleby, Robert; Aquines Gutierrez, Osvaldo; Archilli, Flavio; Artamonov, Alexander; Artuso, Marina; Aslanides, Elie; Auriemma, Giulio; Baalouch, Marouen; Bachmann, Sebastian; Back, John; Badalov, Alexey; Baesso, Clarissa; Baldini, Wander; Barlow, Roger; Barschel, Colin; Barsuk, Sergey; Barter, William; Batozskaya, Varvara; Battista, Vincenzo; Bay, Aurelio; Beaucourt, Leo; Beddow, John; Bedeschi, Franco; Bediaga, Ignacio; Belogurov, Sergey; Belous, Konstantin; Belyaev, Ivan; Ben-Haim, Eli; Bencivenni, Giovanni; Benson, Sean; Benton, Jack; Berezhnoy, Alexander; Bernet, Roland; Bettler, Marc-Olivier; van Beuzekom, Martinus; Bien, Alexander; Bifani, Simone; Bird, Thomas; Bizzeti, Andrea; Bjørnstad, Pål Marius; Blake, Thomas; Blanc, Frédéric; Blouw, Johan; Blusk, Steven; Bocci, Valerio; Bondar, Alexander; Bondar, Nikolay; Bonivento, Walter; Borghi, Silvia; Borgia, Alessandra; Borsato, Martino; Bowcock, Themistocles; Bowen, Espen Eie; Bozzi, Concezio; Brambach, Tobias; Bressieux, Joël; Brett, David; Britsch, Markward; Britton, Thomas; Brodzicka, Jolanta; Brook, Nicholas; Brown, Henry; Bursche, Albert; Buytaert, Jan; Cadeddu, Sandro; Calabrese, Roberto; Calvi, Marta; Calvo Gomez, Miriam; Campana, Pierluigi; Campora Perez, Daniel; Carbone, Angelo; Carboni, Giovanni; Cardinale, Roberta; Cardini, Alessandro; Carson, Laurence; Carvalho Akiba, Kazuyoshi; Casse, Gianluigi; Cassina, Lorenzo; Castillo Garcia, Lucia; Cattaneo, Marco; Cauet, Christophe; Cenci, Riccardo; Charles, Matthew; Charpentier, Philippe; Chefdeville, Maximilien; Chen, Shanzhen; Cheung, Shu-Faye; Chiapolini, Nicola; Chrzaszcz, Marcin; Ciba, Krzystof; Cid Vidal, Xabier; Ciezarek, Gregory; Clarke, Peter; Clemencic, Marco; Cliff, Harry; Closier, Joel; Coco, Victor; Cogan, Julien; Cogneras, Eric; Cogoni, Violetta; Cojocariu, Lucian; Collazuol, Gianmaria; Collins, Paula; Comerma-Montells, Albert; Contu, Andrea; Cook, Andrew; Coombes, Matthew; Coquereau, Samuel; Corti, Gloria; Corvo, Marco; Counts, Ian; Couturier, Benjamin; Cowan, Greig; Craik, Daniel Charles; Crocombe, Andrew; Cruz Torres, Melissa Maria; Cunliffe, Samuel; Currie, Robert; D'Ambrosio, Carmelo; Dalseno, Jeremy; David, Pascal; David, Pieter; Davis, Adam; De Bruyn, Kristof; De Capua, Stefano; De Cian, Michel; De Miranda, Jussara; De Paula, Leandro; De Silva, Weeraddana; De Simone, Patrizia; Decamp, Daniel; Deckenhoff, Mirko; Del Buono, Luigi; Déléage, Nicolas; Derkach, Denis; Deschamps, Olivier; Dettori, Francesco; Di Canto, Angelo; Dijkstra, Hans; Donleavy, Stephanie; Dordei, Francesca; Dorigo, Mirco; Dosil Suárez, Alvaro; Dossett, David; Dovbnya, Anatoliy; Dreimanis, Karlis; Dujany, Giulio; Dupertuis, Frederic; Durante, Paolo; Dzhelyadin, Rustem; Dziurda, Agnieszka; Dzyuba, Alexey; Easo, Sajan; Egede, Ulrik; Egorychev, Victor; Eidelman, Semen; Eisenhardt, Stephan; Eitschberger, Ulrich; Ekelhof, Robert; Eklund, Lars; El Rifai, Ibrahim; Elsasser, Christian; Ely, Scott; Esen, Sevda; Evans, Hannah Mary; Evans, Timothy; Falabella, Antonio; Färber, Christian; Farinelli, Chiara; Farley, Nathanael; Farry, Stephen; Fay, Robert; Ferguson, Dianne; Fernandez Albor, Victor; Ferreira Rodrigues, Fernando; Ferro-Luzzi, Massimiliano; Filippov, Sergey; Fiore, Marco; Fiorini, Massimiliano; Firlej, Miroslaw; Fitzpatrick, Conor; Fiutowski, Tomasz; Fol, Philip; Fontana, Marianna; Fontanelli, Flavio; Forty, Roger; Francisco, Oscar; Frank, Markus; Frei, Christoph; Frosini, Maddalena; Fu, Jinlin; Furfaro, Emiliano; Gallas Torreira, Abraham; Galli, Domenico; Gallorini, Stefano; Gambetta, Silvia; Gandelman, Miriam; Gandini, Paolo; Gao, Yuanning; García Pardiñas, Julián; Garofoli, Justin; Garra Tico, Jordi; Garrido, Lluis; Gascon, David; Gaspar, Clara; Gauld, Rhorry; Gavardi, Laura; Geraci, Angelo; Gersabeck, Evelina; Gersabeck, Marco; Gershon, Timothy; Ghez, Philippe; Gianelle, Alessio; Gianì, Sebastiana; Gibson, Valerie; Giubega, Lavinia-Helena; Gligorov, V.V.; Göbel, Carla; Golubkov, Dmitry; Golutvin, Andrey; Gomes, Alvaro; Gotti, Claudio; Grabalosa Gándara, Marc; Graciani Diaz, Ricardo; Granado Cardoso, Luis Alberto; Graugés, Eugeni; Graverini, Elena; Graziani, Giacomo; Grecu, Alexandru; Greening, Edward; Gregson, Sam; Griffith, Peter; Grillo, Lucia; Grünberg, Oliver; Gui, Bin; Gushchin, Evgeny; Guz, Yury; Gys, Thierry; Hadjivasiliou, Christos; Haefeli, Guido; Haen, Christophe; Haines, Susan; Hall, Samuel; Hamilton, Brian; Hampson, Thomas; Han, Xiaoxue; Hansmann-Menzemer, Stephanie; Harnew, Neville; Harnew, Samuel; Harrison, Jonathan; He, Jibo; Head, Timothy; Heijne, Veerle; Hennessy, Karol; Henrard, Pierre; Henry, Louis; Hernando Morata, Jose Angel; van Herwijnen, Eric; Heß, Miriam; Hicheur, Adlène; Hill, Donal; Hoballah, Mostafa; Hombach, Christoph; Hulsbergen, Wouter; Hunt, Philip; Hussain, Nazim; Hutchcroft, David; Hynds, Daniel; Idzik, Marek; Ilten, Philip; Jacobsson, Richard; Jaeger, Andreas; Jalocha, Pawel; Jans, Eddy; Jaton, Pierre; Jawahery, Abolhassan; Jing, Fanfan; John, Malcolm; Johnson, Daniel; Jones, Christopher; Joram, Christian; Jost, Beat; Jurik, Nathan; Kandybei, Sergii; Kanso, Walaa; Karacson, Matthias; Karbach, Moritz; Karodia, Sarah; Kelsey, Matthew; Kenyon, Ian; Ketel, Tjeerd; Khanji, Basem; Khurewathanakul, Chitsanu; Klaver, Suzanne; Klimaszewski, Konrad; Kochebina, Olga; Kolpin, Michael; Komarov, Ilya; Koopman, Rose; Koppenburg, Patrick; Korolev, Mikhail; Kozlinskiy, Alexandr; Kravchuk, Leonid; Kreplin, Katharina; Kreps, Michal; Krocker, Georg; Krokovny, Pavel; Kruse, Florian; Kucewicz, Wojciech; Kucharczyk, Marcin; Kudryavtsev, Vasily; Kurek, Krzysztof; Kvaratskheliya, Tengiz; La Thi, Viet Nga; Lacarrere, Daniel; Lafferty, George; Lai, Adriano; Lambert, Dean; Lambert, Robert W; Lanfranchi, Gaia; Langenbruch, Christoph; Langhans, Benedikt; Latham, Thomas; Lazzeroni, Cristina; Le Gac, Renaud; van Leerdam, Jeroen; Lees, Jean-Pierre; Lefèvre, Regis; Leflat, Alexander; Lefrançois, Jacques; Leo, Sabato; Leroy, Olivier; Lesiak, Tadeusz; Leverington, Blake; Li, Yiming; Likhomanenko, Tatiana; Liles, Myfanwy; Lindner, Rolf; Linn, Christian; Lionetto, Federica; Liu, Bo; Lohn, Stefan; Longstaff, Iain; Lopes, Jose; Lopez-March, Neus; Lowdon, Peter; Lucchesi, Donatella; Luo, Haofei; Lupato, Anna; Luppi, Eleonora; Lupton, Oliver; Machefert, Frederic; Machikhiliyan, Irina V; Maciuc, Florin; Maev, Oleg; Malde, Sneha; Malinin, Alexander; Manca, Giulia; Mancinelli, Giampiero; Mapelli, Alessandro; Maratas, Jan; Marchand, Jean François; Marconi, Umberto; Marin Benito, Carla; Marino, Pietro; Märki, Raphael; Marks, Jörg; Martellotti, Giuseppe; Martens, Aurelien; Martín Sánchez, Alexandra; Martinelli, Maurizio; Martinez Santos, Diego; Martinez Vidal, Fernando; Martins Tostes, Danielle; Massafferri, André; Matev, Rosen; Mathe, Zoltan; Matteuzzi, Clara; Mazurov, Alexander; McCann, Michael; McCarthy, James; McNab, Andrew; McNulty, Ronan; McSkelly, Ben; Meadows, Brian; Meier, Frank; Meissner, Marco; Merk, Marcel; Milanes, Diego Alejandro; Minard, Marie-Noelle; Moggi, Niccolò; Molina Rodriguez, Josue; Monteil, Stephane; Morandin, Mauro; Morawski, Piotr; Mordà, Alessandro; Morello, Michael Joseph; Moron, Jakub; Morris, Adam Benjamin; Mountain, Raymond; Muheim, Franz; Müller, Katharina; Mussini, Manuel; Muster, Bastien; Naik, Paras; Nakada, Tatsuya; Nandakumar, Raja; Nasteva, Irina; Needham, Matthew; Neri, Nicola; Neubert, Sebastian; Neufeld, Niko; Neuner, Max; Nguyen, Anh Duc; Nguyen, Thi-Dung; Nguyen-Mau, Chung; Nicol, Michelle; Niess, Valentin; Niet, Ramon; Nikitin, Nikolay; Nikodem, Thomas; Novoselov, Alexey; O'Hanlon, Daniel Patrick; Oblakowska-Mucha, Agnieszka; Obraztsov, Vladimir; Oggero, Serena; Ogilvy, Stephen; Okhrimenko, Oleksandr; Oldeman, Rudolf; Onderwater, Gerco; Orlandea, Marius; Otalora Goicochea, Juan Martin; Owen, Patrick; Oyanguren, Maria Arantza; Pal, Bilas Kanti; Palano, Antimo; Palombo, Fernando; Palutan, Matteo; Panman, Jacob; Papanestis, Antonios; Pappagallo, Marco; Pappalardo, Luciano; Parkes, Christopher; Parkinson, Christopher John; Passaleva, Giovanni; Patel, Girish; Patel, Mitesh; Patrignani, Claudia; Pearce, Alex; Pellegrino, Antonio; Penso, Gianni; Pepe Altarelli, Monica; Perazzini, Stefano; Perret, Pascal; Perrin-Terrin, Mathieu; Pescatore, Luca; Pesen, Erhan; Pessina, Gianluigi; Petridis, Konstantin; Petrolini, Alessandro; Picatoste Olloqui, Eduardo; Pietrzyk, Boleslaw; Pilař, Tomas; Pinci, Davide; Pistone, Alessandro; Playfer, Stephen; Plo Casasus, Maximo; Polci, Francesco; Poluektov, Anton; Polyakov, Ivan; Polycarpo, Erica; Popov, Alexander; Popov, Dmitry; Popovici, Bogdan; Potterat, Cédric; Price, Eugenia; Price, Joseph David; Prisciandaro, Jessica; Pritchard, Adrian; Prouve, Claire; Pugatch, Valery; Puig Navarro, Albert; Punzi, Giovanni; Qian, Wenbin; Rachwal, Bartolomiej; Rademacker, Jonas; Rakotomiaramanana, Barinjaka; Rama, Matteo; Rangel, Murilo; Raniuk, Iurii; Rauschmayr, Nathalie; Raven, Gerhard; Redi, Federico; Reichert, Stefanie; Reid, Matthew; dos Reis, Alberto; Ricciardi, Stefania; Richards, Sophie; Rihl, Mariana; Rinnert, Kurt; Rives Molina, Vincente; Robbe, Patrick; Rodrigues, Ana Barbara; Rodrigues, Eduardo; Rodriguez Perez, Pablo; Roiser, Stefan; Romanovsky, Vladimir; Romero Vidal, Antonio; Rotondo, Marcello; Rouvinet, Julien; Ruf, Thomas; Ruiz, Hugo; Ruiz Valls, Pablo; Saborido Silva, Juan Jose; Sagidova, Naylya; Sail, Paul; Saitta, Biagio; Salustino Guimaraes, Valdir; Sanchez Mayordomo, Carlos; Sanmartin Sedes, Brais; Santacesaria, Roberta; Santamarina Rios, Cibran; Santovetti, Emanuele; Sarti, Alessio; Satriano, Celestina; Satta, Alessia; Saunders, Daniel Martin; Savrina, Darya; Schiller, Manuel; Schindler, Heinrich; Schlupp, Maximilian; Schmelling, Michael; Schmidt, Burkhard; Schneider, Olivier; Schopper, Andreas; Schune, Marie Helene; Schwemmer, Rainer; Sciascia, Barbara; Sciubba, Adalberto; Semennikov, Alexander; Sepp, Indrek; Serra, Nicola; Serrano, Justine; Sestini, Lorenzo; Seyfert, Paul; Shapkin, Mikhail; Shapoval, Illya; Shcheglov, Yury; Shears, Tara; Shekhtman, Lev; Shevchenko, Vladimir; Shires, Alexander; Silva Coutinho, Rafael; Simi, Gabriele; Sirendi, Marek; Skidmore, Nicola; Skillicorn, Ian; Skwarnicki, Tomasz; Smith, Anthony; Smith, Edmund; Smith, Eluned; Smith, Jackson; Smith, Mark; Snoek, Hella; Sokoloff, Michael; Soler, Paul; Soomro, Fatima; Souza, Daniel; Souza De Paula, Bruno; Spaan, Bernhard; Sparkes, Ailsa; Spradlin, Patrick; Sridharan, Srikanth; Stagni, Federico; Stahl, Marian; Stahl, Sascha; Steinkamp, Olaf; Stenyakin, Oleg; Stevenson, Scott; Stoica, Sabin; Stone, Sheldon; Storaci, Barbara; Stracka, Simone; Straticiuc, Mihai; Straumann, Ulrich; Stroili, Roberto; Subbiah, Vijay Kartik; Sun, Liang; Sutcliffe, William; Swientek, Krzysztof; Swientek, Stefan; Syropoulos, Vasileios; Szczekowski, Marek; Szczypka, Paul; Szumlak, Tomasz; T'Jampens, Stephane; Teklishyn, Maksym; Tellarini, Giulia; Teubert, Frederic; Thomas, Christopher; Thomas, Eric; van Tilburg, Jeroen; Tisserand, Vincent; Tobin, Mark; Tolk, Siim; Tomassetti, Luca; Tonelli, Diego; Topp-Joergensen, Stig; Torr, Nicholas; Tournefier, Edwige; Tourneur, Stephane; Tran, Minh Tâm; Tresch, Marco; Tsaregorodtsev, Andrei; Tsopelas, Panagiotis; Tuning, Niels; Ubeda Garcia, Mario; Ukleja, Artur; Ustyuzhanin, Andrey; Uwer, Ulrich; Vacca, Claudia; Vagnoni, Vincenzo; Valenti, Giovanni; Vallier, Alexis; Vazquez Gomez, Ricardo; Vazquez Regueiro, Pablo; Vázquez Sierra, Carlos; Vecchi, Stefania; Velthuis, Jaap; Veltri, Michele; Veneziano, Giovanni; Vesterinen, Mika; Viaud, Benoit; Vieira, Daniel; Vieites Diaz, Maria; Vilasis-Cardona, Xavier; Vollhardt, Achim; Volyanskyy, Dmytro; Voong, David; Vorobyev, Alexey; Vorobyev, Vitaly; Voß, Christian; de Vries, Jacco; Waldi, Roland; Wallace, Charlotte; Wallace, Ronan; Walsh, John; Wandernoth, Sebastian; Wang, Jianchun; Ward, David; Watson, Nigel; Websdale, David; Whitehead, Mark; Wicht, Jean; Wiedner, Dirk; Wilkinson, Guy; Williams, Matthew; Williams, Mike; Wilschut, Hans; Wilson, Fergus; Wimberley, Jack; Wishahi, Julian; Wislicki, Wojciech; Witek, Mariusz; Wormser, Guy; Wotton, Stephen; Wright, Simon; Wyllie, Kenneth; Xie, Yuehong; Xing, Zhou; Xu, Zhirui; Yang, Zhenwei; Yuan, Xuhao; Yushchenko, Oleg; Zangoli, Maria; Zavertyaev, Mikhail; Zhang, Liming; Zhang, Wen Chao; Zhang, Yanxi; Zhelezov, Alexey; Zhokhov, Anatoly; Zhong, Liang; Zvyagin, Alexander

    2015-03-05

    The LHCb detector is a forward spectrometer at the Large Hadron Collider (LHC) at CERN. The experiment is designed for precision measurements of CP violation and rare decays of beauty and charm hadrons. In this paper the performance of the various LHCb sub-detectors and the trigger system are described, using data taken from 2010 to 2012. It is shown that the design criteria of the experiment have been met. The excellent performance of the detector has allowed the LHCb collaboration to publish a wide range of physics results, demonstrating LHCb's unique role, both as a heavy flavour experiment and as a general purpose detector in the forward region.

  2. Understand steam generator performance

    Energy Technology Data Exchange (ETDEWEB)

    Ganapathy, V. (ABCO Industries, Abilene, TX (United States))

    1994-12-01

    Several variables affect the design and performance of packaged steam generators. Engineers should understand these parameters and their effects so that they can select cost-effective design options and write good specifications. Knowing how the steam parameters and efficiency vary with load can also help plant engineers plan their operation better. This article discusses the effects of such variables as excess air, fuel type, exit gas temperature, load, and emissions on generator design and operation. It also discusses some of the potential benefits of customized steam generators over standard, prepackaged designs, which often compromise on overall performance. The focus of the article is limited to gaseous and oil fuels.

  3. High performance AC drives

    CERN Document Server

    Ahmad, Mukhtar

    2010-01-01

    This book presents a comprehensive view of high performance ac drives. It may be considered as both a text book for graduate students and as an up-to-date monograph. It may also be used by R & D professionals involved in the improvement of performance of drives in the industries. The book will also be beneficial to the researchers pursuing work on multiphase drives as well as sensorless and direct torque control of electric drives since up-to date references in these topics are provided. It will also provide few examples of modeling, analysis and control of electric drives using MATLAB/SIMULIN

  4. PERFORMING [AUTO] ETHNOGRAPHY POLITICALLY

    Directory of Open Access Journals (Sweden)

    Norman K. Denzin

    2015-06-01

    Full Text Available Building on earlier arguments, I propose a civic, publicly responsable [auto] ethnography that addresses the central issues of self, race, gender, class, society, and democracy.  I begin with pedagogies of hope and the sociological and ethnographic imaginations.  I turn then to the ethnographer and cultural studies, reviewing several models of critical ethnography. I next examine critical performance pedagogy, politics, and critical race theory, and conclude with a brief discussion of the practices of a performative cultural politics.

  5. Python high performance programming

    CERN Document Server

    Lanaro, Gabriele

    2013-01-01

    An exciting, easy-to-follow guide illustrating the techniques to boost the performance of Python code, and their applications with plenty of hands-on examples.If you are a programmer who likes the power and simplicity of Python and would like to use this language for performance-critical applications, this book is ideal for you. All that is required is a basic knowledge of the Python programming language. The book will cover basic and advanced topics so will be great for you whether you are a new or a seasoned Python developer.

  6. Performance, Accountability, and Results.

    Science.gov (United States)

    Drucker, Peter F.

    1992-01-01

    Although technology might greatly increase school performance, the economics will be hard to manage and explain to a tax-paying public. As in hospitals, technology is an expensive investment that will not replace people. Schooling's true challenge is not handling machinery but creating a multicultural society. To succeed, schools must emphasize…

  7. Danish High Performance Concretes

    DEFF Research Database (Denmark)

    Nielsen, M. P.; Christoffersen, J.; Frederiksen, J.

    1994-01-01

    In this paper the main results obtained in the research program High Performance Concretes in the 90's are presented. This program was financed by the Danish government and was carried out in cooperation between The Technical University of Denmark, several private companies, and Aalborg University...

  8. Hardwood siding performance.

    Science.gov (United States)

    Glenn A. Cooper

    1967-01-01

    A 6-year exposure test of three styles of siding made from nine hardwoods and given three treatments showed that full-length yellow-poplar vertical tongue-and-groove siding dip-treated in a water-repellent preservative performed best.

  9. Benchmarking of workplace performance

    NARCIS (Netherlands)

    van der Voordt, Theo; Jensen, Per Anker

    2017-01-01

    This paper aims to present a process model of value adding corporate real estate and facilities management and to discuss which indicators can be used to measure and benchmark workplace performance.

    In order to add value to the organisation, the work environment has to provide value for

  10. Fostering oral presentation performance

    OpenAIRE

    Ginkel, van, J.R.; Gulikers, Judith; Biemans, Harm; Mulder, Martin

    2017-01-01

    Previous research revealed significant differences in the effectiveness of various feedback sources for encouraging students’ oral presentation performance. While former studies emphasised the superiority of teacher feedback, it remains unclear whether the quality of feedback actually differs between commonly used sources in higher education. Therefore, this study examines feedback processes conducted directly after 95 undergraduate students’ presentations in the following conditions: teacher...

  11. Wireless networked music performance

    CERN Document Server

    Gabrielli, Leonardo

    2016-01-01

    This book presents a comprehensive overview of the state of the art in Networked Music Performance (NMP) and a historical survey of computer music networking. It introduces current technical trends in NMP and technical issues yet to be addressed. It also lists wireless communication protocols and compares these to the requirements of NMP. Practical use cases and advancements are also discussed.

  12. Nuclear Enterprise Performance Measurement

    Science.gov (United States)

    2011-03-01

    Transportation Process Efficiency X Supportability X Reliability X System Performance X Maintainability X Logistics IT Supply Chain Mangement X Operations...measurement system design: A literature review and research agenda. International Journal of Operations and Production Mangement , 15(4), 80-116

  13. Pedestrians' performance and satisfaction

    NARCIS (Netherlands)

    Methorst, R.; Horst, A.R.A. van der

    2010-01-01

    In the framework of the PQN project, assessments have been carried out to arrive at real figures on the pedestrians’ performance and satisfaction. The results regarding key figures are: • About 50% of the pedestrians have limited abilities and about 10% of the population has severe difficulties

  14. Collaboration in Performing Arts

    NARCIS (Netherlands)

    C.B.G. Langeveld (Cees); Belme, D.; Koppenberg, T.

    2014-01-01

    markdownabstract__Abstract__ As a result of declining government support, performing arts organisations (PAOs) face increased challenges and difficulties in the sector. They attempt to develop new ways of generating income and seek new models of organising the production and presentation of

  15. Army Sociocultural Performance Requirements

    Science.gov (United States)

    2014-06-01

    practice elsewhere. Therefore, pre-deployment training can serve to raise awareness of specific issues that may be encountered by Soldiers, as...L., Crafts, J. L., & Brooks, J. E. (July 1995). Intercultural communication requirements for Special Forces teams. (Study Report 1683). Arlington... five years. Cultural performance requirements are the actions Soldiers must take on their jobs to work effectively with people from different

  16. Performing Feminism - Kirsten Justesen

    DEFF Research Database (Denmark)

    Anderberg, Birgitte

    2016-01-01

    Kirsten Justesen is a major figure within the field of early body art and performance. The essay looks at her explorations within this new field as she engaged in a structural, analytical and actionbased mode confronting the classical concept of sculpture as a purely structural and syntactic ques...

  17. Cyclone performance by velocity

    Science.gov (United States)

    Cyclones are used almost exclusively in the US cotton ginning industry for emission abatement on pneumatic conveying system exhausts because of their high efficiency, and low capital and operating cost.. Cyclone performance is improved by increasing collection effectiveness or decreasing energy cons...

  18. Assessing Team Performance.

    Science.gov (United States)

    Trimble, Susan; Rottier, Jerry

    Interdisciplinary middle school level teams capitalize on the idea that the whole is greater than the sum of its parts. Administrators and team members can maximize the advantages of teamwork using team assessments to increase the benefits for students, teachers, and the school environment. Assessing team performance can lead to high performing…

  19. performance liquid chromatography

    African Journals Online (AJOL)

    user

    2010-11-22

    Nov 22, 2010 ... This study is aimed to determine the concentration of acrylamide in processed food products available in open market. In order to determine the acrylamide concentration, three bakery items and three fried chips from three different brands were analyzed. High-performance liquid chromatography (HPLC) ...

  20. Performance Assessment for Mastoidectomy.

    Science.gov (United States)

    Sethia, Rishabh; Kerwin, Thomas F; Wiet, Gregory J

    2017-01-01

    Objective The aim of this report is to provide a review of the current literature for assessment of performance for mastoidectomy, to identify the current assessment tools available in the literature, and to summarize the evidence for their validity. Data Sources The MEDLINE database was accessed via PubMed. Review Methods Inclusion criteria consisted of English-language published articles that reported use of a mastoidectomy performance assessment tool. Studies ranged from 2007 to November 2015 and were divided into 2 groups: intraoperative assessments and those performed with simulation (cadaveric laboratory or virtual reality). Studies that contained specific reliability analyses were also highlighted. For each publication, validity evidence data were analyzed and interpreted according to conceptual definitions provided in a recent systematic review on the modern framework of validity evidence. Conclusions Twenty-three studies were identified that met our inclusion criteria for review, including 4 intraoperative objective assessment studies, 5 cadaveric studies, 10 virtual reality simulation studies, and 4 that used both cadaveric assessment and virtual reality. Implications for Practice A review of the literature revealed a wide variety of mastoidectomy assessment tools and varying levels of reliability and validity evidence. The assessment tool developed at Johns Hopkins possesses the most validity evidence of those reviewed. However, a number of agreed-on specific metrics could be integrated into a standardized assessment instrument to be used nationally. A universally agreed-on assessment tool will provide a means for developing standardized benchmarks for performing mastoid surgery.

  1. Assessing oral presentation performance

    NARCIS (Netherlands)

    Ginkel, van Stan; Laurentzen, Ramona; Mulder, Martin; Mononen, Asko; Kyttä, Janika; Kortelainen, Mika J.

    2017-01-01

    Purpose: The purpose of this paper is to design a rubric instrument for assessing oral presentation performance in higher education and to test its validity with an expert group. Design/methodology/approach: This study, using mixed methods, focusses on: designing a rubric by identifying

  2. Creating sustainable performance.

    Science.gov (United States)

    Spreitzer, Gretchen; Porath, Christine

    2012-01-01

    What makes for sustainable individual and organizational performance? Employees who are thriving-not just satisfied and productive but also engaged in creating the future. The authors found that people who fit this description demonstrated 16% better overall performance, 125% less burnout, 32% more commitment to the organization, and 46% more job satisfaction than their peers. Thriving has two components: vitality, or the sense of being alive and excited, and learning, or the growth that comes from gaining knowledge and skills. Some people naturally build vitality and learning into their jobs, but most employees are influenced by their environment. Four mechanisms, none of which requires heroic effort or major resources, create the conditions for thriving: providing decision-making discretion, sharing information about the organization and its strategy, minimizing incivility, and offering performance feedback. Organizations such as Alaska Airlines, Zingerman's, Quicken Loans, and Caiman Consulting have found that helping people grow and remain energized at work is valiant on its own merits-but it can also boost performance in a sustainable way.

  3. High performance systems

    Energy Technology Data Exchange (ETDEWEB)

    Vigil, M.B. [comp.

    1995-03-01

    This document provides a written compilation of the presentations and viewgraphs from the 1994 Conference on High Speed Computing given at the High Speed Computing Conference, {open_quotes}High Performance Systems,{close_quotes} held at Gleneden Beach, Oregon, on April 18 through 21, 1994.

  4. Fire performance issues

    Science.gov (United States)

    S. M. Cramer; R. H. White

    1997-01-01

    The worldwide movement toward performance-based building codes is prompting the need for new computational methods to predict fire endurance of wood assemblies. Progress in the past twenty years in understanding fire endurance of individual solid wood components has been achieved in many different countries. The greatest opportunity for major advance in fire research...

  5. Performance Evaluation Process.

    Science.gov (United States)

    1998

    This document contains four papers from a symposium on the performance evaluation process and human resource development (HRD). "Assessing the Effectiveness of OJT (On the Job Training): A Case Study Approach" (Julie Furst-Bowe, Debra Gates) is a case study of the effectiveness of OJT in one of a high-tech manufacturing company's product…

  6. Meditation and Academic Performance.

    Science.gov (United States)

    Fiebert, Martin S.; Mead, Travis M.

    1981-01-01

    An experimental group of college students were taught and asked to practice actualism meditation techniques before studying and before examinations. Controls were taught the techniques but asked to practice at other times. The groups did not differ in mean study time, but the experimental group performed significantly better on examinations.…

  7. Evacuation performance evaluation tool.

    Science.gov (United States)

    Farra, Sharon; Miller, Elaine T; Gneuhs, Matthew; Timm, Nathan; Li, Gengxin; Simon, Ashley; Brady, Whittney

    2016-01-01

    Hospitals conduct evacuation exercises to improve performance during emergency events. An essential aspect in this process is the creation of reliable and valid evaluation tools. The objective of this article is to describe the development and implications of a disaster evacuation performance tool that measures one portion of the very complex process of evacuation. Through the application of the Delphi technique and DeVellis's framework, disaster and neonatal experts provided input in developing this performance evaluation tool. Following development, content validity and reliability of this tool were assessed. Large pediatric hospital and medical center in the Midwest. The tool was pilot tested with an administrative, medical, and nursing leadership group and then implemented with a group of 68 healthcare workers during a disaster exercise of a neonatal intensive care unit (NICU). The tool has demonstrated high content validity with a scale validity index of 0.979 and inter-rater reliability G coefficient (0.984, 95% CI: 0.948-0.9952). The Delphi process based on the conceptual framework of DeVellis yielded a psychometrically sound evacuation performance evaluation tool for a NICU.

  8. Info@performance

    DEFF Research Database (Denmark)

    Jespersen, Kristina Risom

    2003-01-01

    The design of interactive methods for collecting can benefit from the Web-technology. Info@performance.NPD illustrate the combination of experimental design, role-playing and a scenario build on Web-based technology. Having created a simulation of a new product development process, Info...

  9. Performance based fault diagnosis

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik

    2002-01-01

    Different aspects of fault detection and fault isolation in closed-loop systems are considered. It is shown that using the standard setup known from feedback control, it is possible to formulate fault diagnosis problems based on a performance index in this general standard setup. It is also shown...

  10. Performance of ATLAS tracking

    CERN Document Server

    Roe, Shaun; The ATLAS collaboration

    2017-01-01

    Run-2 of the Large Hadron Collider (LHC) has provided new challenges to track and vertex reconstruction with higher centre-of-mass energies and luminosity leading to increasingly high-multiplicity envi-ronments. This talk provides an overview of the tracking performance, highlighting tracking improvements due to the Insertable B-Layer (IBL) and the introduction of time-dependent alignment.

  11. Academic Work and Performativity

    Science.gov (United States)

    Kenny, John

    2017-01-01

    Neoliberal reforms in higher education have resulted in corporate managerial practices in universities and a drive for efficiency and productivity in teaching and research. As a result, there has been an intensification of academic work, increased stress for academics and an emphasis on accountability and performativity in universities. This paper…

  12. Representing and Performing Businesses

    DEFF Research Database (Denmark)

    Boll, Karen

    2014-01-01

    This article investigates a segmentation model used by the Danish Tax and Customs Administration to classify businesses’ motivational postures. The article uses two different conceptualisations of performativity to analyse what the model’s segmentations do: Hacking’s notion of making up people...

  13. Om performance og oplevelsesanalyse

    DEFF Research Database (Denmark)

    Nagbøl, Søren Peter; Flensborg, Ingelise

    2016-01-01

    , teori og praksis kan gennemføres i oplevelsesorienterede processer, hvor performance, sanselig praksis, transformeres til ting, sprog og billeder. Med afsæt i en konkret skulptur, Auguste Rodins (1840-1917) "Borgerne fra Calais", som er udstillet på Ny Carlsberg Glyptotek i København, giver vi eksempler...

  14. Coping with Performance Anxiety.

    Science.gov (United States)

    Haid, Karen

    1999-01-01

    Discusses how to enable students to cope with performance anxiety. Focuses on how the music should be put ahead of all other considerations, the importance of preparation and appropriate music level, and creating a preparation strategy that involves developing students' independent musical judgment and preparing the music itself. Provides seven…

  15. Mitigating component performance variation

    Energy Technology Data Exchange (ETDEWEB)

    Gara, Alan G.; Sylvester, Steve S.; Eastep, Jonathan M.; Nagappan, Ramkumar; Cantalupo, Christopher M.

    2018-01-09

    Apparatus and methods may provide for characterizing a plurality of similar components of a distributed computing system based on a maximum safe operation level associated with each component and storing characterization data in a database and allocating non-uniform power to each similar component based at least in part on the characterization data in the database to substantially equalize performance of the components.

  16. NGINX high performance

    CERN Document Server

    Sharma, Rahul

    2015-01-01

    System administrators, developers, and engineers looking for ways to achieve maximum performance from NGINX will find this book beneficial. If you are looking for solutions such as how to handle more users from the same system or load your website pages faster, then this is the book for you.

  17. Analysis of EDP performance

    Science.gov (United States)

    1994-01-01

    The objective of this contract was the investigation of the potential performance gains that would result from an upgrade of the Space Station Freedom (SSF) Data Management System (DMS) Embedded Data Processor (EDP) '386' design with the Intel Pentium (registered trade-mark of Intel Corp.) '586' microprocessor. The Pentium ('586') is the latest member of the industry standard Intel X86 family of CISC (Complex Instruction Set Computer) microprocessors. This contract was scheduled to run in parallel with an internal IBM Federal Systems Company (FSC) Internal Research and Development (IR&D) task that had the goal to generate a baseline flight design for an upgraded EDP using the Pentium. This final report summarizes the activities performed in support of Contract NAS2-13758. Our plan was to baseline performance analyses and measurements on the latest state-of-the-art commercially available Pentium processor, representative of the proposed space station design, and then phase to an IBM capital funded breadboard version of the flight design (if available from IR&D and Space Station work) for additional evaluation of results. Unfortunately, the phase-over to the flight design breadboard did not take place, since the IBM Data Management System (DMS) for the Space Station Freedom was terminated by NASA before the referenced capital funded EDP breadboard could be completed. The baseline performance analyses and measurements, however, were successfully completed, as planned, on the commercial Pentium hardware. The results of those analyses, evaluations, and measurements are presented in this final report.

  18. System Performance and Testing

    NARCIS (Netherlands)

    Frei, U.; Oversloot, H.

    2004-01-01

    This chapter compares and contrasts the system performance of two widely used solar thermal systems using testing and simulation programs. Solar thermal systems are used in many countries for heating domestically used water. In addition to the simple thermosiphon systems, better designed pumped

  19. Experiencing Performative Urban Space

    DEFF Research Database (Denmark)

    Marling, Gitte

    2012-01-01

    The focus of the article is performative urban spaces. The case study the Frederiksberg New City Centre. Here the atmosphere is produced via intentional designs and via different arrangements with sound, light and water. The designer has worked with different moods and experiences of moods. Some...

  20. Effect of particle size and distribution of the sizing agent on the carbon fibers surface and interfacial shear strength (IFSS) of its composites

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, R.L. [Open Project of State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology (China); School of Materials Science and Engineering, Shandong University of Science and Technology, 266590 Qingdao (China); Liu, Y. [School of Materials Science and Engineering, Shandong University of Science and Technology, 266590 Qingdao (China); Huang, Y.D., E-mail: rlzhit@126.com [School of Chemical Engineering and Technology, State Key laboratory of Urban Water Resource and Environment Department of Applied Chemistry, Harbin Institute of Technology, 150001 Harbin (China); Liu, L. [School of Chemical Engineering and Technology, State Key laboratory of Urban Water Resource and Environment Department of Applied Chemistry, Harbin Institute of Technology, 150001 Harbin (China)

    2013-12-15

    Effect of particle size and distribution of the sizing agent on the performance of carbon fiber and carbon fiber composites has been investigated. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to characterize carbon fiber surface topographies. At the same time, the single fiber strength and Weibull distribution were also studied in order to investigate the effect of coatings on the fibers. The interfacial shear strength and hygrothermal aging of the carbon fiber/epoxy resin composites were also measured. The results indicated that the particle size and distribution is important for improving the surface of carbon fibers and its composites performance. Different particle size and distribution of sizing agent has different contribution to the wetting performance of carbon fibers. The fibers sized with P-2 had higher value of IFSS and better hygrothermal aging resistant properties.

  1. Performing Communit(yies

    Directory of Open Access Journals (Sweden)

    Debbie Horsfall

    2008-05-01

    Full Text Available This paper tells the story of a group of community workers, activists and academics who came together, in a participatory inquiry, to explore "good news stories of difference and resistance". Using an organising principle of social change from the margins we engaged in, and collected, local stories of hope, ordinary resistances and success. Using simple strategies such as story telling, purposeful listening, fun, laughter, food and creativity we sought to celebrate, document, analyse and make visible our successes and nurture each other. After five years 40 people came together to plan and host a creative community conference in the Blue Mountains of New South Wales (NSW, Australia. As a result of this a creative reflective writing group was established to reflect on this event using WINTER, BUCK and SOBIECHOWSKA's (1999 notion of a patchwork text and RICHARDSON's (2000 writing as inquiry as theoretical and methodological underpinnings. Concerned with talking with, rather than to, our audiences the writing group developed a play script (AMBLER et al., 2002 which was performed at four conferences. This article discusses the creative writing group/inquiry group process, the play script and performances as examples and manifestations of performative social science in action. In so doing I explore theoretical questions which underpin the historical moment of performative social science as performance ethnography. This seems important if, as social scientists, we are interested in "future-oriented research" which produces works that speak clearly and powerfully as well as works that are committed to changing the world not just describing it (DENZIN, 2000, p.915. URN: urn:nbn:de:0114-fqs0802573

  2. EMU Suit Performance Simulation

    Science.gov (United States)

    Cowley, Matthew S.; Benson, Elizabeth; Harvill, Lauren; Rajulu, Sudhakar

    2014-01-01

    Introduction: Designing a planetary suit is very complex and often requires difficult trade-offs between performance, cost, mass, and system complexity. To verify that new suit designs meet requirements, full prototypes must be built and tested with human subjects. However, numerous design iterations will occur before the hardware meets those requirements. Traditional draw-prototype-test paradigms for research and development are prohibitively expensive with today's shrinking Government budgets. Personnel at NASA are developing modern simulation techniques that focus on a human-centric design paradigm. These new techniques make use of virtual prototype simulations and fully adjustable physical prototypes of suit hardware. This is extremely advantageous and enables comprehensive design down-selections to be made early in the design process. Objectives: The primary objective was to test modern simulation techniques for evaluating the human performance component of two EMU suit concepts, pivoted and planar style hard upper torso (HUT). Methods: This project simulated variations in EVA suit shoulder joint design and subject anthropometry and then measured the differences in shoulder mobility caused by the modifications. These estimations were compared to human-in-the-loop test data gathered during past suited testing using four subjects (two large males, two small females). Results: Results demonstrated that EVA suit modeling and simulation are feasible design tools for evaluating and optimizing suit design based on simulated performance. The suit simulation model was found to be advantageous in its ability to visually represent complex motions and volumetric reach zones in three dimensions, giving designers a faster and deeper comprehension of suit component performance vs. human performance. Suit models were able to discern differing movement capabilities between EMU HUT configurations, generic suit fit concerns, and specific suit fit concerns for crewmembers based

  3. Performance Measurement at Universities

    DEFF Research Database (Denmark)

    Lueg, Klarissa

    2014-01-01

    This paper proposes empirical approaches to testing the reliability, validity, and organizational effectiveness of student evaluations of teaching (SET) as a performance measurement instrument in knowledge management at the institutional level of universities. Departing from Weber’s concept...... and legitimation forms the basis for proposing four steps of investigation. The suggested mixed-methods approach comprises the following: first, thematic analysis can serve as a tool to evaluate the legitimacy discourse as initiated by official SET affirmative documents by government, university, and students...... of bureaucracy and critical responses to this concept, we discuss how contemporary SET are used as an instrument of organizational control at Danish universities. A discussion of the current state of performance measurement within the frame of new public management (NPM) and its impact on knowledge creation...

  4. Environmental Performance Report 2015

    Energy Technology Data Exchange (ETDEWEB)

    2016-07-01

    The National Renewable Energy Laboratory's (NREL's) Environmental Performance Report provides a description of the laboratory's environmental management activities for 2015, including information on environmental and sustainability performance, environmental compliance activities and status, and environmental protection programs, highlights, and successes. The purpose of this report is to ensure that U.S. Department of Energy (DOE) and the public receive timely, accurate information about events that have affected or could adversely affect the health, safety, and security of the public or workers; the environment; or the operations of DOE facilities. This report meets the requirements of the Annual Site Environmental Report and is prepared in accordance with the DOE Order 231.1B, Environment, Safety and Health Reporting.

  5. Environmental Performance Report 2016

    Energy Technology Data Exchange (ETDEWEB)

    Braus, Genevieve [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-06

    The National Renewable Energy Laboratory's (NREL's) Environmental Performance Report provides a description of the laboratory's environmental management activities for 2016, including information on environmental and sustainability performance, environmental compliance activities and status, and environmental protection programs, highlights, and successes. The purpose of this report is to ensure that U.S. Department of Energy (DOE) and the public receive timely, accurate information about events that have affected or could adversely affect the health, safety, and security of the public or workers; the environment; or the operations of DOE facilities. This report meets the requirements of the Annual Site Environmental Report and is prepared in accordance with the DOE Order 231.1B, Environment, Safety and Health Reporting.

  6. Residential Energy Performance Metrics

    Directory of Open Access Journals (Sweden)

    Christopher Wright

    2010-06-01

    Full Text Available Techniques for residential energy monitoring are an emerging field that is currently drawing significant attention. This paper is a description of the current efforts to monitor and compare the performance of three solar powered homes built at Missouri University of Science and Technology. The homes are outfitted with an array of sensors and a data logger system to measure and record electricity production, system energy use, internal home temperature and humidity, hot water production, and exterior ambient conditions the houses are experiencing. Data is being collected to measure the performance of the houses, compare to energy modeling programs, design and develop cost effective sensor systems for energy monitoring, and produce a cost effective home control system.

  7. Residential energy performance metrics

    Energy Technology Data Exchange (ETDEWEB)

    Wright, Ch. [Department of Engineering Management, Missouri University of Science and Technology, 600 W. 14th Street, Rolla, MO 65409 (United States); Baur, S. [Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 1401 Pine Street, Rolla, MO 65409 (United States); Grantham, K. [Department of Engineering Management, Missouri University of Science and Technology, 600 W. 14th Street, Rolla, MO 65409 (United States); Stone, R. B. [School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR, 97331(United States); Grasman, S. E. [Department of Engineering Management, Missouri University of Science and Technology, 600 W. 14th Street, Rolla, MO 65409 (United States)

    2010-06-15

    Techniques for residential energy monitoring are an emerging field that is currently drawing significant attention. This paper is a description of the current efforts to monitor and compare the performance of three solar powered homes built at Missouri University of Science and Technology. The homes are outfitted with an array of sensors and a data logger system to measure and record electricity production, system energy use, internal home temperature and humidity, hot water production, and exterior ambient conditions the houses are experiencing. Data is being collected to measure the performance of the houses, compare to energy modeling programs, design and develop cost effective sensor systems for energy monitoring, and produce a cost effective home control system. (authors)

  8. High-Performance Networking

    CERN Document Server

    CERN. Geneva

    2003-01-01

    The series will start with an historical introduction about what people saw as high performance message communication in their time and how that developed to the now to day known "standard computer network communication". It will be followed by a far more technical part that uses the High Performance Computer Network standards of the 90's, with 1 Gbit/sec systems as introduction for an in depth explanation of the three new 10 Gbit/s network and interconnect technology standards that exist already or emerge. If necessary for a good understanding some sidesteps will be included to explain important protocols as well as some necessary details of concerned Wide Area Network (WAN) standards details including some basics of wavelength multiplexing (DWDM). Some remarks will be made concerning the rapid expanding applications of networked storage.

  9. Plant performance enhancement program

    Energy Technology Data Exchange (ETDEWEB)

    Munchausen, J.H. [EPRI Plant Support Engineering, Charlotte, NC (United States)

    1995-09-01

    The Plant Performance Enhancement Program (P{sup 2}EP), an initiative of the Electric Power Research Institute (EPRI), responds to strong industry incentives to improve nuclear plant thermal efficiency and electrical output. Launched by EPRI`s Nuclear Power Division, P{sup 2}EP operates within the purview of the Plant Support Engineering (PSE) Program, with day-to-day activities conducted out of the P{sup 2}EP office headquartered at EPRI`s facility in Charlotte, North Carolina. This alignment is consistent with EPFU`s strategic targets in support of industry goals, keeping P{sup 2}EP`s mission in clear focus: Helping utility thermal performance engineers improve the heat rate of nuclear power plants, thereby increasing unit average capacity and reducing plant operations and maintenance costs per kilowatt-hour.

  10. Human Performance in Space

    Science.gov (United States)

    Jones, Patricia M.; Fiedler, Edna

    2010-01-01

    Human factors is a critical discipline for human spaceflight. Nearly every human factors research area is relevant to space exploration -- from the ergonomics of hand tools used by astronauts, to the displays and controls of a spacecraft cockpit or mission control workstation, to levels of automation designed into rovers on Mars, to organizational issues of communication between crew and ground. This chapter focuses more on the ways in which the space environment (especially altered gravity and the isolated and confined nature of long-duration spaceflight) affects crew performance, and thus has specific novel implications for human factors research and practice. We focus on four aspects of human performance: neurovestibular integration, motor control and musculo-skeletal effects, cognitive effects, and behavioral health. We also provide a sampler of recent human factors studies from NASA.

  11. Understand boiler performance characteristics

    Energy Technology Data Exchange (ETDEWEB)

    Ganapathy, V. (ABCO Industries, Abilene, TX (United States))

    1994-08-01

    An understanding of the major differences in performance characteristics of steam generators is essential to better use and integrate them into plant steam systems. Process and cogeneration plants widely use gas- or oil-fired packaged steam generators and gas-turbine-exhaust, heat-recovery steam generators to meet steam demands. The most important differences are efficiency versus load characteristics, gas/steam temperature profiles and partial load behavior. Also, steaming in the economizer is a concern at low steam flows for HRSGs, but not for packaged boilers. The paper describes packaged boilers, how emissions impact design of packaged boilers, completely water-cooled furnace, superheater design, packaged boiler performance characteristics, heat-recovery steam generators, and basic differences between HRSGs and packaged boilers.

  12. Marketization and Economic Performance

    DEFF Research Database (Denmark)

    Hansen, Morten Balle

    2010-01-01

    . A reform enforcing compulsory competitive tendering in homecare for elderly people in Denmark is analysed and its relation to measures of economic performance is explored. Two competing models of marketization are contrasted in the analysis: a problem solving model inspired by public choice ideology......The public management reforms of the past three decades have been characterized by organizational innovations usually associated with New Public Management (NPM) and reinventing government. In particular, neoliberal ideas of strengthening market mechanisms in the public sector have been prominent......, in which marketization processes are seen as driven by work-related concerns for efficiency and performance, and a macro phenomenological institutional model, in which innovation processes are seen as driven by factors related to hegemonic ideologies, legitimacy concerns and coercive enforcement. Very...

  13. PERFORMANCE IN ROMANIAN EDUCATION

    Directory of Open Access Journals (Sweden)

    Dorel Ursu

    2013-12-01

    Full Text Available This paper wants to make a statement toward the romanian education system. We have lots of unfullfilments and shortcomings in the completition of the educational act. I want to capture some of the scientifical and sporting events from 2012 and 2013 in which romanian youngsters have participated. We have great valuable children, that bring pride to us, by puting the country with the best in the world. In 2012 only, 113 prizes were brought home by the roamanian students, from international olimpics, not including sporting events. In each child we must see a potential, either intelectual or sporting. School and family must work together, and the government and political forces should sustain their performances. The paper will be based on a study that shows performance and acknowledgement on an international level in the last ten years.

  14. University Performance Management

    DEFF Research Database (Denmark)

    quantitative measurement systems for resource allocation and performance evaluation. Compared to other countries the changes in performance measurements and governance of the Danish universities are radical and the Minister of Science heralded them as "the greatest change in university management since...... the founding of Copenhagen University in 1479". The changes took place with surprisingly little resistance from university scholars. The articles in this anthology investigate the origins and rationales for the silent managerial revolution at Danish Universities and the radical implications for the identity......For the last two decades the Danish Universities have felt the impact of the international trend towards implementation of New Public Management. The results are seen in the implementation of new hierarchical governance structures and contractual governance system including market based...

  15. PERFORMING [AUTO] ETHNOGRAPHY POLITICALLY

    OpenAIRE

    Denzin, Norman K.

    2015-01-01

    Building on earlier arguments, I propose a civic, publicly responsable [auto] ethnography that addresses the central issues of self, race, gender, class, society, and democracy.  I begin with pedagogies of hope and the sociological and ethnographic imaginations.  I turn then to the ethnographer and cultural studies, reviewing several models of critical ethnography. I next examine critical performance pedagogy, politics, and critical race theory, and conclude with a brief discussion of the pra...

  16. Performing with the Environment

    OpenAIRE

    Ryan, Courtney Beth

    2014-01-01

    Focusing on twentieth through twenty-first century ecological theater, literature, film, and new media in the United States, I ask how humans may interact with the environment rather than only act upon it. While the nascent field of eco-theater recognizes the importance of space and place, this dissertation goes a step further, combining spatial theory and ecocriticism in order to generate a spatialized eco-performance. The project takes up the prefix trans- to consider human and nonhuman env...

  17. MINDFULNESS AND SPORT PERFORMANCE

    OpenAIRE

    Israel Mañas; Jesús del Águila; Clemente Franco; Mª Dolores Gil; Consolación Gil

    2014-01-01

    Mindfulness in sports is a recent field. While sport psychology relied mainly on “second wave” cognitive-behavioural interventions for the last four decades, a new approach has recently been developed in sport psychology including mindfulness: a “third wave” approach. This new approach assumes that ideal performance is a state that is not based on self-control or change in behaviour, but rather a state that arises from recognition and acceptance of thoughts, emotions and bodily sensations. Pr...

  18. comportement-performance (SCP)

    African Journals Online (AJOL)

    ivoirienne : un essai de justification par rap- proche structuraliste du paradigme structure- comportement-performance (SCP). René N'Guettia Kouassi *. Résumé : Cette étude tente de justifier les résultats de l'agro-industrie ivoirienne à tra- vers le moule de la structure de son marché. Tout en soulignant l'intérêt de.

  19. UR10 Performance Analysis

    DEFF Research Database (Denmark)

    Ravn, Ole; Andersen, Nils Axel; Andersen, Thomas Timm

    While working with the UR-10 robot arm, it has become apparent that some commands have undesired behaviour when operating the robot arm through a socket connection, sending one command at a time. This report is a collection of the results optained when testing the performance of the different...... commands available in URScript to control the robot. It will also describe the different time delays discovered when using the UR-10 robot arm...

  20. High Performance Concrete

    Directory of Open Access Journals (Sweden)

    Traian Oneţ

    2009-01-01

    Full Text Available The paper presents the last studies and researches accomplished in Cluj-Napoca related to high performance concrete, high strength concrete and self compacting concrete. The purpose of this paper is to raid upon the advantages and inconveniences when a particular concrete type is used. Two concrete recipes are presented, namely for the concrete used in rigid pavement for roads and another one for self-compacting concrete.

  1. Measuring the Company Performance

    Directory of Open Access Journals (Sweden)

    Ion Stancu

    2006-03-01

    Full Text Available According to the logics of the efficient capital investment, the management of the investment of the saving capital in the company’s assets must conclude, on the end of the financial year, with a plus ofreal value (NPV > 0. From this point of view, in this paper we suggest the usage of an investment valuationmodel for the assessment of the company managerial and technological performance. Supposing the book value is a proxy of the just value (of assets and operational results and supposing the capital cost iscorrectly estimated, we evaluate the company’s performance both by the net present value model, and also by the company’s ability to create a surplus of the invested capital (NPV >0.Our paper also aims to identify the performance of the financial breakeven point (for which NPV is at least equal to zero as the minimum acceptable level for the company’s activity. Under this critical sales point, the company goes through the undervaluation of shareholders fortune even if the company’s sales are greater than accounting breakeven point. The performance’s activity level is one which the managers recover and surpass the cost of capital, cost which stand for the normal activity benchmark.The risks of applying of our suggested model we support go down to the confidence of accounting data and of the cost of capital estimating. In spite all of this, the usage of a sensitivity analysis to search anaverage NPV would leads to the company’s performance valuation within investment logic with a high information power.

  2. Performing stencil computations

    Energy Technology Data Exchange (ETDEWEB)

    Donofrio, David

    2018-01-16

    A method and apparatus for performing stencil computations efficiently are disclosed. In one embodiment, a processor receives an offset, and in response, retrieves a value from a memory via a single instruction, where the retrieving comprises: identifying, based on the offset, one of a plurality of registers of the processor; loading an address stored in the identified register; and retrieving from the memory the value at the address.

  3. Keeping time - Performing Place

    DEFF Research Database (Denmark)

    Dvinge, Anne Christine

    2012-01-01

    Candace Allen’s novel Valaida (2004) illustrates the migratory patterns of early 20th century jazz music and musicians, positing the art form and its performers as “heterotopians”; simultaneously in and outside of the power relations of hegemonic time-space compression, travelling in an alternate...... and performance offers an alternate space, where the radical potential lies in the moment of communication and community, constituting a diasporic practice and heterutopian spaces of sound and time.......Candace Allen’s novel Valaida (2004) illustrates the migratory patterns of early 20th century jazz music and musicians, positing the art form and its performers as “heterotopians”; simultaneously in and outside of the power relations of hegemonic time-space compression, travelling in an alternate...... and reactionary and suggests that the way time is employed in a heterotopic space determines its progressive potential. Spaces of accumulative, static, or frozen time refuse to yield any utopian promise, whereas fluid, dynamic, and ephemeral time offers moments of agency. In the case of Valaida, music...

  4. Performing a bone gammagraphy

    Directory of Open Access Journals (Sweden)

    Marta Corbacho Martín

    2010-03-01

    Full Text Available In the Nuclear Medicine service multitude of diagnostic tests are performed, being one of them the bone gammagraphy that acquires a very important role both by the high demand for this test, because of its simplicity and in the realization by its high sensitivity.The bone gammagraphy as opposed to conventional radiological techniques not only provides an anatomical view, but also adds a functional imaging that provides information on bone metabolism. Addition is not restricted to malignant bone disease (primary or metastatic tumors, but it is very useful for most benign osteoarticular processes. It would be interesting to bring to the nursing knowledge of this test for a proper implementation of it, because it is a very defendant but unknown to many nurses, thus going to unify the standards of performance. The need for nursing professionals during the performance of this technique because the patient remains in these units for quite some time, being responsible for the care while they remain in the unit, taking their physical, psychological and social. We also have a key role in providing information and reassurance when the patient arrives at the unit and it is therefore necessary to have information and training necessary to answer these key questions.

  5. Behavior and Performance Project

    Science.gov (United States)

    Washburn, David A.; Rumbaugh, Duane M.; Shlyk, Galina; Vassilieva, Oxana; Richardson, W. Kirk

    1998-01-01

    Behavior is an overt manifestation of underlying biology. As such, alterations in biological systems that result from spaceflight would be expected to evidence themselves in subtle or even pronounced changes in the behavior of that organism. These alterations in visible behavior may then indicate or even be diagnostic of alterations in the physical well-being of humans and other animals as they adapt to space environments or readapt to Earth--alterations that might not otherwise be detected without relatively invasive and frequently expensive procedures. Moreover, behavior and performance constitute the central standard for evaluating the mission success of spaceflight ventures. The success or failure of any excursion into space is primarily indexed by the ability of astronauts and cosmonauts to perform the tasks and experiments of any particular mission, to land a re-entry vehicle after extended exposure to microgravity (as with the space shuttle), or to make time-critical and life-saving repairs or other decisions while in orbit (as with the recent Mir events). Thus, understanding the effects spaceflight on behavior and performance is inherently important, in addition to those insights that behavior can provide about the physiological consequences of space adaptation.

  6. Criteria for performance evaluation

    Directory of Open Access Journals (Sweden)

    David J. Weiss

    2009-03-01

    Full Text Available Using a cognitive task (mental calculation and a perceptual-motor task (stylized golf putting, we examined differential proficiency using the CWS index and several other quantitative measures of performance. The CWS index (Weiss and Shanteau, 2003 is a coherence criterion that looks only at internal properties of the data without incorporating an external standard. In Experiment 1, college students (n = 20 carried out 2- and 3-digit addition and multiplication problems under time pressure. In Experiment 2, experienced golfers (n = 12, also college students, putted toward a target from nine different locations. Within each experiment, we analyzed the same responses using different methods. For the arithmetic tasks, accuracy information (mean absolute deviation from the correct answer, MAD using a coherence criterion was available; for golf, accuracy information using a correspondence criterion (mean deviation from the target, also MAD was available. We ranked the performances of the participants according to each measure, then compared the orders using Spearman's rextsubscript{s}. For mental calculation, the CWS order correlated moderately (rextsubscript{s} =.46 with that of MAD. However, a different coherence criterion, degree of model fit, did not correlate with either CWS or accuracy. For putting, the ranking generated by CWS correlated .68 with that generated by MAD. Consensual answers were also available for both experiments, and the rankings they generated correlated highly with those of MAD. The coherence vs. correspondence distinction did not map well onto criteria for performance evaluation.

  7. High Performance Slab-on-Grade Foundation Insulation Retrofits

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, Louise F. [NorthernSTAR, St. Paul, MN (United States); Mosiman, Garrett E. [NorthernSTAR, St. Paul, MN (United States)

    2015-09-01

    ?A more accurate assessment of SOG foundation insulation energy savings than traditionally possible is now feasible. This has been enabled by advances in whole building energy simulation with 3-dimensional foundation modelling integration at each time step together with an experimental measurement of the site energy savings of SOG foundation insulation. Ten SOG insulation strategies were evaluated on a test building to identify an optimum retrofit insulation strategy in a zone 6 climate (Minneapolis, MN). The optimum insulation strategy in terms of energy savings and cost effectiveness consisted of two components: (a) R-20 XPS insulation above grade, and, (b) R-20 insulation at grade (comprising an outer layer of R-10 insulation and an interior layer of R-12 poured polyurethane insulation) tapering to R-10 XPS insulation at half the below-grade wall height (the lower half of the stem wall was uninsulated). The optimum insulation strategy was applied to single and multi-family residential buildings in climate zone 4 - 7. The highest site energy savings of 5% was realized for a single family home in Duluth, MN, and the lowest savings of 1.4 % for a 4-unit townhouse in Richmond, VA. SOG foundation insulation retrofit simple paybacks ranged from 18 to 47 years. There are other benefits of SOG foundation insulation resulting from the increase in the slab surface temperatures. These include increased occupant thermal comfort, and a decrease in slab surface condensation particularly around the slab perimeter.

  8. Caffeine and sports performance.

    Science.gov (United States)

    Burke, Louise M

    2008-12-01

    Athletes are among the groups of people who are interested in the effects of caffeine on endurance and exercise capacity. Although many studies have investigated the effect of caffeine ingestion on exercise, not all are suited to draw conclusions regarding caffeine and sports performance. Characteristics of studies that can better explore the issues of athletes include the use of well-trained subjects, conditions that reflect actual practices in sport, and exercise protocols that simulate real-life events. There is a scarcity of field-based studies and investigations involving elite performers. Researchers are encouraged to use statistical analyses that consider the magnitude of changes, and to establish whether these are meaningful to the outcome of sport. The available literature that follows such guidelines suggests that performance benefits can be seen with moderate amounts (~3 mg.kg-1 body mass) of caffeine. Furthermore, these benefits are likely to occur across a range of sports, including endurance events, stop-and-go events (e.g., team and racquet sports), and sports involving sustained high-intensity activity lasting from 1-60 min (e.g., swimming, rowing, and middle and distance running races). The direct effects on single events involving strength and power, such as lifts, throws, and sprints, are unclear. Further studies are needed to better elucidate the range of protocols (timing and amount of doses) that produce benefits and the range of sports to which these may apply. Individual responses, the politics of sport, and the effects of caffeine on other goals, such as sleep, hydration, and refuelling, also need to be considered.

  9. Aleatorism and Sporting Performance

    Directory of Open Access Journals (Sweden)

    Kosiewicz Jerzy

    2017-03-01

    Full Text Available A sporting spectacle is an important cultural event, essentially influencing social and individual lives. In spite of this, there does not yet exist a monograph that analyzes, describes, and explains sporting performance from the point of view of aleatorism as part of the theory of sport and physical culture. Unfortunately, no monograph has developed this issue in a multi-aspectual, holistic, culturological, and philosophical way, dealing with its axiological values (aesthetic and praxeological. This applies to the relations between this phenomenon and the mechanisms that bring about the development and growth of interest in the social dimension.

  10. Performance, postmodernity and errors

    DEFF Research Database (Denmark)

    Harder, Peter

    2013-01-01

    with the prestige variety, and conflate non-standard variation with parole/performance and class both as erroneous. Nowadays the anti-structural sentiment of present-day linguistics makes it tempting to confuse the rejection of ideal abstract structure with a rejection of any distinction between grammatical...... as deviant from the perspective of function-based structure and discuss to what extent the recognition of a community langue as a source of adaptive pressure may throw light on different types of deviation, including language handicaps and learner errors....

  11. Beam instrumentation performance overview

    CERN Document Server

    Sapinski, M

    2012-01-01

    The 2011 run has proven that LHC can operate safely and stably with higher bunch intensity and smaller transverse emittance than foreseen in the Technical Design Report. In this presentation the performance of the Beam Position Monitoring (BPM) system is discussed. The improvements to the system, those made during the last year and those expected to be done for 2012 run are presented. The status of the three types of devices measuring the transverse beam emittance, wire scanners (BWS), synchrotron radiation monitors (BSRT) and beam gas ionization monitors (BGI), are shown. The control room applications are reviewed and a set of improvements proposed by the operation team is presented.

  12. High Performance Liquid Chromatography

    Science.gov (United States)

    Talcott, Stephen

    High performance liquid chromatography (HPLC) has many applications in food chemistry. Food components that have been analyzed with HPLC include organic acids, vitamins, amino acids, sugars, nitrosamines, certain pesticides, metabolites, fatty acids, aflatoxins, pigments, and certain food additives. Unlike gas chromatography, it is not necessary for the compound being analyzed to be volatile. It is necessary, however, for the compounds to have some solubility in the mobile phase. It is important that the solubilized samples for injection be free from all particulate matter, so centrifugation and filtration are common procedures. Also, solid-phase extraction is used commonly in sample preparation to remove interfering compounds from the sample matrix prior to HPLC analysis.

  13. Learnability and linguistic performance

    DEFF Research Database (Denmark)

    Drozd, Kenneth

    2004-01-01

    of the human biological endowment for language in the form of a UNIVERSAL GRAMMAR (UG) (Chomsky, 1965). With respect to experimental design, C&T have strongly maintained that even young children know UG constraints but perform poorly in some experiments-due to the extralinguistic demands associated......Stephen Crain (C) & Rosalind Thornton (T) have garnered a well-deserved reputation for their unwavering commitment to language learnability as a constraint not only on theories of child language and language development but also on experimental design and the interpretation of experimental findings...

  14. Performance through thickfolds

    DEFF Research Database (Denmark)

    Sack-Nielsen, Torsten

    2017-01-01

    are essential. The ability of adaptation opens - like in nature - the perspective to optimise climatic behaviour within a given local context. The principle of folding contains dynamic aspects with the capability both to adjust shape through its changing geometry [form] and the specific movement embedded...... in the fold pattern [kinematics]. In this PhD project, folding is investigated phenomenologically, exploratively as well as experimentally, to exploit and document on how climate-responsive performance potentials can be utilised in architecture. ‘Origami technology’, as the emerging, cross-disciplinary field...

  15. Performative urban Spaces

    DEFF Research Database (Denmark)

    Marling, Gitte

    2010-01-01

    The article examines the background of contemporary life, i.e., the urban teoretical and analytical framework that shows the nee for a pluralistic and open city life. possibilities for developing performative places and spaces for social and cultural exchange will be suggested. The article...... for establishing 'open -minded' urban spaces and public domains. In the fifth section, I present and define a series of analytical concepts related to the experience city's stages and cultural projects. The article ends with a short conclusion and recapitulation....

  16. Conducting Elite Performance Training.

    Science.gov (United States)

    Silverman, Elliott; Tucker, Scott A; Imsdahl, Solveig; Charles, Justin A; Stellato, Mallory A; Wagner, Mercy D; Brown, Kimberly M

    2015-08-01

    Training to excellence in the conduct of surgical procedures has many similarities to the acquisition and mastery of technical skills in elite-level music and sports. By using coaching techniques and strategies gleaned from analysis of professional music ensembles and athletic training, surgical educators can set conditions that increase the success rate of training to elite performance. This article describes techniques and strategies used in both music and athletic coaching, and it discusses how they can be applied and integrated into surgical simulation and education. Published by Elsevier Inc.

  17. 2012 Environmental Performance Index and Pilot Trend Environmental Performance Index

    Data.gov (United States)

    National Aeronautics and Space Administration — The 2012 Environmental Performance Index (EPI) ranks 132 countries on 22 performance indicators in the following 10 policy categories: environmental burden of...

  18. High performance data transfer

    Science.gov (United States)

    Cottrell, R.; Fang, C.; Hanushevsky, A.; Kreuger, W.; Yang, W.

    2017-10-01

    The exponentially increasing need for high speed data transfer is driven by big data, and cloud computing together with the needs of data intensive science, High Performance Computing (HPC), defense, the oil and gas industry etc. We report on the Zettar ZX software. This has been developed since 2013 to meet these growing needs by providing high performance data transfer and encryption in a scalable, balanced, easy to deploy and use way while minimizing power and space utilization. In collaboration with several commercial vendors, Proofs of Concept (PoC) consisting of clusters have been put together using off-the- shelf components to test the ZX scalability and ability to balance services using multiple cores, and links. The PoCs are based on SSD flash storage that is managed by a parallel file system. Each cluster occupies 4 rack units. Using the PoCs, between clusters we have achieved almost 200Gbps memory to memory over two 100Gbps links, and 70Gbps parallel file to parallel file with encryption over a 5000 mile 100Gbps link.

  19. Optimizing IA-64 performance

    CERN Document Server

    Jarp, S

    2001-01-01

    Examines key features of the Itanium processor architecture and microarchitecture. The Itanium, originally known as the IA-64, is a 64-bit processor designed by Hewlett-Packard and Intel. In addition to the obvious performance gains that 64-bit addressing brings, the Itanium also supports performance-enhancing techniques such as predication, speculation, rotating registers, a wide parallel execution core, high clock speed, fast bus architecture, multiple execution units, and the like. Moreover, the Itanium is designed from the ground up around parallelism and uses a new kind of instruction set based on the Explicit Parallel Instruction Computing (EPIC) specification, which allows the processing of Windows-based and UNIX- based applications, among other features. Operating-system support for the IA-64 has been announced for 64-bit Windows, HP-UX, varieties of Linux, and AIX 51. The author shows how to achieve optimal code generation by a compiler or generate optimized sequences ofIA-64 assembly code to ensure ...

  20. Performance and Philosophy Now

    Directory of Open Access Journals (Sweden)

    Tasoula Kallenou

    2015-11-01

    Full Text Available Was Plato the first philosophical dramatist to explore philosophical ideas through dramatic content, introducing dramatic structures currently in line with contemporary theatre? If Plato was an influential figure for philosophers as well as theatre-makers, it can arguably be said that he was a silent pioneer in creating the newly defined discipline of Performance Philosophy. There is an obvious polarity between performance and philosophy since both disciplines are on the quest of exploring and presenting what life is. At least this can be said of ancient Greek and Roman philosophy. Conceived as “biou techne” the art of living, Greek and Roman philosophers, especially the Epicureans, Stoics and Skeptics, saw philosophy as a way of conceiving what a good life is (a life worth living and pursuing its practical realization for the attainment of eudemonia. Plato was arguably the first significant philosopher to explore philosophical ideas through dramatic content, introducing dramatic structures currently in line with contemporary theatre views. As such, he can be seen as an influential figure for theatre makers as well as for philosophers. Plato’s artistic intention was to uncover the artist that lacked substance and support the knowledgeable creative philosophical mind that besides instant emotional pleasure has to contribute in social development.

  1. Naps, cognition and performance.

    Science.gov (United States)

    Ficca, Gianluca; Axelsson, John; Mollicone, Daniel J; Muto, Vincenzo; Vitiello, Michael V

    2010-08-01

    Daytime napping is a frequent habit of many individuals, whether healthy or not, and may occur in a wide variety of contexts. There are several reasons for napping in the human adult, including prophylactic strategies or recuperative need, respectively before or after sleep loss, or even pure appetitive drive. Thus, it is of great theoretical and clinical interest to assess the impact of naps on individuals' performance, especially on cognitive functioning. As the outgrowth of a symposium held by the authors at the 5th Congress of the World Federation of Sleep Research and Sleep Medicine Societies in Cairns, Australia, September 2007, this review will specifically explore: a) the newly developed experimental daytime split-sleep schedules and their effects on recovery, compared with those deriving from a single consolidated sleep episode of equal duration; b) whether naps may be beneficial to wakefulness performance in the working context, through accurate review of "on field" studies; c) the impact of naps on cognition, in light of the very recent advances in the study of naps and memory processes; d) the main features of napping behavior in older individuals and its impact on their health and general functioning, since it is widely recognized that napping may change as a result of the aging process. (c) 2009 Elsevier Ltd. All rights reserved.

  2. Thermal Performance Benchmarking

    Energy Technology Data Exchange (ETDEWEB)

    Feng, Xuhui; Moreno, Gilbert; Bennion, Kevin

    2016-06-07

    The goal for this project is to thoroughly characterize the thermal performance of state-of-the-art (SOA) in-production automotive power electronics and electric motor thermal management systems. Information obtained from these studies will be used to: evaluate advantages and disadvantages of different thermal management strategies; establish baseline metrics for the thermal management systems; identify methods of improvement to advance the SOA; increase the publicly available information related to automotive traction-drive thermal management systems; help guide future electric drive technologies (EDT) research and development (R&D) efforts. The thermal performance results combined with component efficiency and heat generation information obtained by Oak Ridge National Laboratory (ORNL) may then be used to determine the operating temperatures for the EDT components under drive-cycle conditions. In FY16, the 2012 Nissan LEAF power electronics and 2014 Honda Accord Hybrid power electronics thermal management system were characterized. Comparison of the two power electronics thermal management systems was also conducted to provide insight into the various cooling strategies to understand the current SOA in thermal management for automotive power electronics and electric motors.

  3. CREDIT Performance Indicator Framework

    DEFF Research Database (Denmark)

    Frandsen, Anne Kathrine; Bertelsen, Niels Haldor; Haugbølle, Kim

    2010-01-01

    During the past two years the Nordic Baltic research project CREDIT (Construction and Real Estate – Developing Indicators for Transparency) has worked with the aim to improve transparency of value creation in building and real estate. One of the central deliverables of the CREDIT project was a fr......During the past two years the Nordic Baltic research project CREDIT (Construction and Real Estate – Developing Indicators for Transparency) has worked with the aim to improve transparency of value creation in building and real estate. One of the central deliverables of the CREDIT project...... was a framework of indicators relevant in building and real estate and applicable in the Nordic and Baltic countries as well as a proposal for a set of key indicators. The study resulting in CREDIT Performance Indicator Framework has been based on 28 case studies of evaluation practises in the building and real...... regulations in the countries participating in CREDIT. The Performance Indicator Framework encompassed 187 indicators grouped in 7 main groups of indicators and 42 sub-groups. Based on the CREDIT case studies it was concluded that there neither is link between certain indicators and specific building types...

  4. Evaluation of emergency department performance

    DEFF Research Database (Denmark)

    Sørup, Christian Michel; Jacobsen, Peter; Forberg, Jakob Lundager

    2013-01-01

    Background Evaluation of emergency department (ED) performance remains a difficult task due to the lack of consensus on performance measures that reflects high quality, efficiency, and sustainability. Aim To describe, map, and critically evaluate which performance measures that the published...

  5. Can painted glass felt or glass fibre cloth be used as vapour barrier?

    OpenAIRE

    El-Khattam, Amira; Andersen, Mie Them; Hansen, Kurt Kielsgaard; Møller, Eva B.

    2014-01-01

    In most Nordic homes the interior surfaces of walls and ceilings have some kind of surface treatment for aesthetical reasons. The treatments can for example be glass felt or glass fibre cloth which are painted afterwards.To evaluate the hygrothermal performance of walls and ceilings it is essential to know how much influence a surface treatment has on the water vapour transport. Traditionally, there has been most focus on paints that affect the permeability as little as possible. However, som...

  6. Damage Mode and Failure Mechanism of Starch-based Aqueous Polymer Isocyanate Plywood Bonded Structure

    OpenAIRE

    Wenbiao Xu; Junyou Shi; Shumin Wang

    2014-01-01

    Aging means that a polymer material’s performance gradually deteriorates, with the loss of use value due to the comprehensive effect of internal and external factors. In this work, a starch-based aqueous polymer isocyanate (API) adhesive joint structure of crosslinking in bonding interface was investigated. The compression shear strength was recognized as a key evaluation index, and the hygrothermal aging experiment tests were accelerated to study the damage mode and failure mechanism of the ...

  7. Procuring complex performance

    DEFF Research Database (Denmark)

    Hartmann, A.; Roehrich, J.; Frederiksen, Lars

    2014-01-01

    – The transition towards PCP can be best described as a learning process which cumulates the knowledge and experience in the client-supplier interaction accompanied by changing contractual and relational capabilities. In public infrastructure this process is not initially motivated by the benefits of value co......Purpose – The paper analyses how public buyers transition from procuring single products and services to procuring complex performance (PCP). The aim is to examine the change in the interactions between buyer and supplier, the emergence of value co-creation and the capability development during...... the transition process. Design/methodology/approach – A multiple, longitudinal case study method is used to examine the transition towards PCP. The study deploys rich qualitative data sets by combining semi-structured interviews, focus group meetings and organisational reports and documents. Findings...

  8. CLASSROOM CULTURE OF PERFORMANCE

    Directory of Open Access Journals (Sweden)

    Silvia FĂT

    2015-12-01

    Full Text Available This article presents the results obtained during an enquiry based on a questionnaire about the classroom culture. This concept it is understood as a micro-society with its own characteristics derived from the dynamic of socialization and training process. This research aims to investigate certain specific aspects of micro-sociology and emphasis on classroom culture. A relatively new concept is reflected by the normative consensus or the integrated system of values that belongs to the teachers, pupils and school, as a social entity. The integrative ensemble of values, class cohesion degree and training strategies are only a few of the aspects described by 62 pupils aged 17-18 years old, from a very prestigious school in Bucharest. The perception of pupils regarding our concept is the effect of the relational practices and training used constantly by the teachers. Those practices reflect the school’s focus mostly on cognitive performance.

  9. Stockyards must perform better

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-03-15

    If the capacity of a bulk stockpiling operation needs to be increased, the trend nowadays, thanks to scarce land availability, is to squeeze maximum performance from the available stockyard machines, rather than extend the surface area of the facility. The article reports on developments in bucket-wheel reclaimers and stacker/reclaimers from ThyssenKrupp Foerdertechnik (TKP), ThyssenKrupp Bulk Tec (TKBT), TKF Germany, Takraf, Sandvik Mining and Construction and Larsen & Tobro. QMASTOR of Newcastle, Australia has developed the SMS3D.net software system providing three-dimensional stockpiles modelling. EECV in Rotterdam, an iron ore and coal import terminal, has awarded the entire conveying technology of the coal terminals to a consortium of FAM Magdeburger Foerderanlangen und Baumaschinen GmbH and the Siemens Group Industrial Solution & Services (I & M). 3 photos.

  10. HTGR Fuel performance basis

    Energy Technology Data Exchange (ETDEWEB)

    Shamasundar, B.I.; Stansfield, O.M.; Jensen, D.D.

    1982-05-01

    The safety characteristics of the high-temperature gas-cooled reactor (HTGR) during normal and accident conditions are determined in part by HTGR fuel performance. During normal operation, less than 0.1% fuel failure occurs, primarily from defective particles. This low fuel failure fraction limits circulating activity to acceptable levels. During severe accidents, the radiological consequence is influenced by high-temperature fuel particle behavior. An empirical fuel failure model, supported by recent experimental data, is presented. The onset of significant fuel particle failure occurs at temperatures in excess of 1600/sup 0/C, and complete fuel failure occurs at 2660/sup 0/C. This indicates that the fuel is more retentive at higher temperatures than previously assumed. The more retentive nature of the fuel coupled with the high thermal capacitance of the core results in slow release of fission products from the core during severe accidents.

  11. El libro como performance

    OpenAIRE

    Craig Epplin

    2015-01-01

    La comunidad poética Estación Pringles entabla un diálogo intrigante con el formato libro. Por una parte, su acercamiento teatral a la poesía parecería excluir la posibilidad de ver este medio como un modelo para el proyecto. Sin embargo, en su diálogo con la línea poética iniciada por Stéphane Mallarmé, esta iniciativa artística propone un concepto del libro como performance. Esta orientación es evidente, además, en la producción impresa de Estación Pringles. The poetry community Estación...

  12. Strategy as Performative Practice

    DEFF Research Database (Denmark)

    Kornberger, Martin; Clegg, Stewart

    2011-01-01

    (traditionally the domain of science) and values (the realm of politics); third, and consequently, that strategy is a sociopolitical practice that aims at mobilizing people, marshalling political will and legitimizing decisions. The article concludes with reflections on five practical implications of the study.......This article focuses on the relation between strategy-as-practice and its power effects in the context of a strategy project (Sustainable Sydney 2030) undertaken by the City of Sydney. The following three interrelated questions guided the enquiry: How is strategy practised? What knowledge...... is it based upon? And what are its power effects? Based on a detailed empirical analysis of the strategy-making process, the article charts how strategy rendered the city knowable and how performative effects of strategizing mobilized the public and legitimized outcomes of the process while silencing other...

  13. Measuring Firm Performance

    DEFF Research Database (Denmark)

    Assaf, A. George; Josiassen, Alexander; Gillen, David

    2014-01-01

    Set in the airport industry, this paper measures firm performance using both desirable and bad outputs (i.e. airport delays). We first estimate a model that does not include the bad outputs and then a model that includes bad outputs. The results show important differences in the efficiency...... and productivity results depending on whether bad outputs are or are not included in the model. The differences reflect the resource cost to society and the potential cost to an airport if such externalities were internalized. Finally, the paper provides measures of shadow prices for the bad output, in our case...... airport delay, and discusses the results in terms of several interesting trends affecting US airports....

  14. Performative Urban Environments

    DEFF Research Database (Denmark)

    Jensen, Ole B.; Thomsen, Bo Stjerne

    2008-01-01

    temporary urban and architectural structures are better understood as complex nexuses of global-local flows and interactions. The paper explores how personal mobile technology and sensor technology can attach the individual perception of place to temporary structures acting as agents for urban experiences......The chapter explores how temporary architectural structures can become media for bottom-up approaches to urban development. Urban interactions in the city developed from the sidewalks were seen as locally bounded neighbourhoods. However, with the advent of contemporary network technologies...... becomes the political tool for incorporating change in urban spaces creating new ‘public domains'. Such conceptualization draws on the notion of ‘performative environments' that focuses on what a building does instead of what it is said to be. Architecture becomes dynamic and open and may act as self...

  15. The Performing Dead

    DEFF Research Database (Denmark)

    Sabra, Jakob Borrits

    the surface of Vor Frelsers Cemetery, as the background for affective resonances of the un-seen and un-told networks that connect people with time, places and spaces, through media. By following a non-representational research approach the project tries to enliven this particular cemetery rather than report...... as functional assistant cemetery in 1790, the 1,66 Acre of Vor Frelser Cemetery have had significant cultural and emotional roothold in the citizens of Amager and the adjacent Copenhagen districts. Today it serves as both the traditional ritual space for the interment of the dead (bodies or cremated remains...... that convey a weave of bodies, sites and memories along with a bodily exploration of the city of Copenhagen. Here invisible life-traces and their way through the urban landscape are animated as a meshwork of relations between the real and the fictional, unfolding in the interplay between performance...

  16. Board Task Performance

    DEFF Research Database (Denmark)

    Minichilli, Alessandro; Zattoni, Alessandro; Nielsen, Sabina

    2012-01-01

    This paper addresses recent calls to narrow the micro–macro gap in management research (Bamberger, 2008), by incorporating a macro-level context variable (country) in exploring micro-level determinants of board effectiveness. Following the integrated model proposed by Forbes and Milliken (1999), we...... identify three board processes as micro-level determinants of board effectiveness. Specifically, we focus on effort norms, cognitive conflicts and the use of knowledge and skills as determinants of board control and advisory task performance. Further, we consider how two different institutional settings...... influence board tasks, and how the context moderates the relationship between processes and tasks. Our hypotheses are tested on a survey-based dataset of 535 medium-sized and large industrial firms in Italy and Norway, which are considered to substantially differ along legal and cultural dimensions...

  17. First BHM performance plots

    CERN Document Server

    CMS Collaboration

    2015-01-01

    A new detector to measure the machine induced background at large radii (1.8 m from beam axis) has been developed and installed in the CMS experiment at LHC. It consists of 40 modules, each comprising a quartz bar read out by a photomultiplier. Since Cherenkov radiation is emitted in a forward cone around the charged particle trajectory, these detectors can distinguish the directions of the machine induced background. The back-end consists of a microTCA readout with excellent time resolution. The performance of the detector modules measured in several test-beam campaigns will be reported. The installation in CMS is described, and first results about operating the detector during data taking is given.

  18. System performance analyzer

    Science.gov (United States)

    Helbig, H. R.

    1981-01-01

    The System Performance Analyzer (SPA) designed to provide accurate real time information about the operation of complex systems and developed for use on the Airborne Data Analysis/Monitor System (ADAMS), a ROLM 1666 based system is described. The system uses an external processor to operate an intelligent, simulated control panel. Also provided are functions to trace operations, determine frequency of use of memory areas, and time or count user tasks in a multitask environment. This augments the information available from the standard debugger and control panel, and reduces the time and effort needed by ROLM 1666 users in optimizing their system, as well as providing documentation of the effect of any changes. The operation and state of the system are evaluated.

  19. Surgeon-performed ultrasonography

    DEFF Research Database (Denmark)

    Todsen, Tobias

    2017-01-01

    Surgeons are increasingly using ultrasonography (US) in their clinical management of patients. However, US is a very user-dependent imaging modality and proper skills of the US operator are needed to ensure quality in patient care. This thesis explores the validity evidence for assessment...... accuracy on patients. However, the RESULTS also indicated that following an initial course, additional training is needed for physicians to achieve competence in US. Research paper III evaluated validity evidence supporting an OSAUS score used to establish pass/fail standards for head & neck US skills...... by a receiver operator characteristic curve for different pass/fail standards of head & neck US skills. In summary this PhD thesis established sources of validity evi-dence supporting the interpretation of the OSAUS scale to evalu-ate surgeon-performed US skills of the abdominal and head & neck diseases. We...

  20. Performance Measurement Baseline Change Request

    Data.gov (United States)

    Social Security Administration — The Performance Measurement Baseline Change Request template is used to document changes to scope, cost, schedule, or operational performance metrics for SSA's Major...

  1. 24 CFR 115.206 - Performance assessments; Performance standards.

    Science.gov (United States)

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Performance assessments; Performance standards. 115.206 Section 115.206 Housing and Urban Development Regulations Relating to Housing... AGENCIES Certification of Substantially Equivalent Agencies § 115.206 Performance assessments; Performance...

  2. E-Commerce Performance. Shopping Cart Key Performance Indicators

    OpenAIRE

    Mihaela I. MUNTEAN; Diana TARNAVEANU; Ana Raluca ION

    2016-01-01

    In an e-commerce performance framework is important to identify the key performance indicators that measure success and together provide the greatest context into the business perfor-mance. Shopping carts are an essential part of ecommerce, a minimal set of key performance indicators being the subject of our debate. The theoretical approach is sustained by a case study, an e-shop implemented using PHP and MySQL, for simulating main business processes within the considered performance framewor...

  3. Beregnede fugtforhold i konstruktioner

    DEFF Research Database (Denmark)

    Rode, Carsten; Rasmussen, Niels T.

    1999-01-01

    efficient building design, and from a catalogue of alternative construction layouts advised by a manufacturer of alternative insulation. The analysis comprises the use of flax, cellulose fibre, perlite, glass wool, and rock wool.The analysis has shown that alternative insulation materials can be used......Calculated Moisture Conditions in Building Constructions. Part of "Hygrothermal Properties of Alternative Insulation Materials".The hygrothermal performance of constructions with alternative insulation products has been analysed with the 1-dimensional computer model MATCH for combined heat...... and moisture transfer. The analysis concerns both traditional wall and roof constructions with the alternative insulation products, and some alternative designs prescribed by manufacturers of alternative insulation materials. The choice of construction types originates both from an official direction on energy...

  4. Performance Prediction Toolkit

    Energy Technology Data Exchange (ETDEWEB)

    2017-09-25

    The Performance Prediction Toolkit (PPT), is a scalable co-design tool that contains the hardware and middle-ware models, which accept proxy applications as input in runtime prediction. PPT relies on Simian, a parallel discrete event simulation engine in Python or Lua, that uses the process concept, where each computing unit (host, node, core) is a Simian entity. Processes perform their task through message exchanges to remain active, sleep, wake-up, begin and end. The PPT hardware model of a compute core (such as a Haswell core) consists of a set of parameters, such as clock speed, memory hierarchy levels, their respective sizes, cache-lines, access times for different cache levels, average cycle counts of ALU operations, etc. These parameters are ideally read off a spec sheet or are learned using regression models learned from hardware counters (PAPI) data. The compute core model offers an API to the software model, a function called time_compute(), which takes as input a tasklist. A tasklist is an unordered set of ALU, and other CPU-type operations (in particular virtual memory loads and stores). The PPT application model mimics the loop structure of the application and replaces the computational kernels with a call to the hardware model's time_compute() function giving tasklists as input that model the compute kernel. A PPT application model thus consists of tasklists representing kernels and the high-er level loop structure that we like to think of as pseudo code. The key challenge for the hardware model's time_compute-function is to translate virtual memory accesses into actual cache hierarchy level hits and misses.PPT also contains another CPU core level hardware model, Analytical Memory Model (AMM). The AMM solves this challenge soundly, where our previous alternatives explicitly include the L1,L2,L3 hit-rates as inputs to the tasklists. Explicit hit-rates inevitably only reflect the application modeler's best guess, perhaps informed by a few

  5. High performance polymer concrete

    Directory of Open Access Journals (Sweden)

    Frías, M.

    2007-06-01

    Full Text Available This paper studies the performance of concrete whose chief components are natural aggregate and an organic binder —a thermosetting polyester resin— denominated polymer concrete or PC. The material was examined macro- and microscopically and its basic physical and mechanical properties were determined using mercury porosimetry, scanning electron microscopy (SEM-EDAX, X-ray diffraction (XRD and strength tests (modulus of elasticity, stress-strain curves and ultimate strengths. According to the results of these experimental studies, the PC exhibited a low density (4.8%, closed pore system and a concomitantly continuous internal microstructure. This would at least partially explain its mechanical out-performance of traditional concrete, with average compressive and flexural strength values of 100 MPa and over 20 MPa, respectively. In the absence of standard criteria, the bending test was found to be a useful supplement to compressive strength tests for establishing PC strength classes.Este trabajo de investigación aborda el estudio de un hormigón de altas prestaciones, formado por áridos naturales y un aglomerante orgánico constituido por una resina termoestable poliéster, denominado hormigón polimérico HP. Se describe el material a nivel microscópico y macroscópico, presentando sus propiedades físicas y mecánicas fundamentales, mediante diferentes técnicas experimentales, tales como: porosimetría de mercurio, microscopía electrónica (SEM-EDAX, difracción de rayos X (DRX y ensayos mecánicos (módulo de elasticidad, curvas tensión- deformación y resistencias últimas. Como consecuencia del estudio experimental llevado a cabo, se ha podido apreciar cómo el HP está formado por porosidad cerrada del 4,8%, proporcionando una elevada continuidad a su microestructura interna, lo que justifica, en parte, la mejora de propiedades mecánicas respecto al hormigón tradicional, con unos valores medios de resistencia a compresión de 100

  6. Fresh Pathways to Performance Management

    Science.gov (United States)

    Foran, Colleen; Doylend, Colleen

    2004-01-01

    For anyone in a leadership position, responsible for the performance of others, there is always an obvious concern with the quality of the work performed and the adherence to the mission, vision, values and culture of the organization. Traditional methods of assuring quality performance include some form of performance appraisal, giving feedback…

  7. Prediction of mill performance

    Energy Technology Data Exchange (ETDEWEB)

    P.A. Bennett [CoalTech Pty Ltd. (Australia)

    2005-07-01

    This Australian Coal Association Research Program (ACARP) project aimed to demonstrate that the Hardgrove Grindability Index (HGI) coupled with standard Petrographic Analysis can be used to greatly improve the prediction of mill power requirements, mill throughput and product size. The project examined the mill test data from ACIRL's pilot scale vertical spindle mill on 96 coals. A total of 360 mill tests, conducted under a wide range of throughputs, roll pressures and classifier settings, were included into the data set. The mill performance of maceral groups or microlithotypes was assumed to be additive, that is, each maceral group or microlithotype behaved independently and a size fraction of the product PF was the volume weighted sum of the petrographic components of that size fraction. Based on this assumption it was possible to determine the size distribution of the product PF, for a wide range of milling conditions, based solely on petrographic analysis. Microlithotypes were not determined directly but were estimated from the maceral analysis. The size distribution of individual maceral groups or microlithotypes can also be estimated based on developed correlations. Size distribution determined from petrographic analysis proved to be a better estimate than that determined from the HGI. Mill power can be estimated from petrographic analysis, but the HGI was found to be a better predictor of mill power. 19 refs., 4 figs., 1 tab.

  8. CMS Trigger Performance

    CERN Document Server

    Donato, Silvio

    2017-01-01

    During its second run of operation (Run 2) which started in 2015, the LHC will deliver a peak instantaneous luminosity that may reach $2 \\cdot 10^{34}$ cm$^{-2}$s$^{-1}$ with an average pile-up of about 55, far larger than the design value. Under these conditions, the online event selection is a very challenging task. In CMS, it is realized by a two-level trigger system the Level-1 (L1) Trigger, implemented in custom-designed electronics, and the High Level Trigger (HLT), a streamlined version of the offline reconstruction software running on a computer farm. In order to face this challenge, the L1 trigger has been through a major upgrade compared to Run 1, whereby all electronic boards of the system have been replaced, allowing more sophisticated algorithms to be run online. Its last stage, the global trigger, is now able to perform complex selections and to compute high-level quantities, like invariant masses. Likewise, the algorithms that run in the HLT go through big improvements; in particular, new appr...

  9. Research Performance Progress Report

    Energy Technology Data Exchange (ETDEWEB)

    Park, Hye -Sook [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2014-09-10

    The major goals of this project is to develop a suite of diagnostics to probe magnetic fields generated by the dynamics of high velocity interpenetrating plasma flows relevant to astrophysical collisionless shocks. Collisionless shocks are common in the universe and are responsible for decelerating and thermalizing supersonic plasma flows and accelerating a fraction of the incident particles to high energies. When high velocity, low density, plasma flows interact in astrophysics, turbulent electrostatic and electromagnetic waves are generated due to plasma instabilities, such as the Weibel instability. This can lead to localized pockets of very strong magnetic field generation. The net result is that the plasmas stagnate in what is called a collisionless shock. Understanding these enigmatic interactions requires well-controlled laboratory experiments able to validate the theory and the simulations. Time and spatially resolved magnetic field diagnostics are key to probing these frontier plasma dynamics, relevant to both astrophysics and laboratory applications of plasma physics. This project will enable us to develop the necessary diagnostics for this experiment on NIF. Our team has vast experience in performing laser experiments, theory, simulations and diagnostic development and is ideally suited for carrying out this work.

  10. High Performance Network Monitoring

    Energy Technology Data Exchange (ETDEWEB)

    Martinez, Jesse E [Los Alamos National Laboratory

    2012-08-10

    Network Monitoring requires a substantial use of data and error analysis to overcome issues with clusters. Zenoss and Splunk help to monitor system log messages that are reporting issues about the clusters to monitoring services. Infiniband infrastructure on a number of clusters upgraded to ibmon2. ibmon2 requires different filters to report errors to system administrators. Focus for this summer is to: (1) Implement ibmon2 filters on monitoring boxes to report system errors to system administrators using Zenoss and Splunk; (2) Modify and improve scripts for monitoring and administrative usage; (3) Learn more about networks including services and maintenance for high performance computing systems; and (4) Gain a life experience working with professionals under real world situations. Filters were created to account for clusters running ibmon2 v1.0.0-1 10 Filters currently implemented for ibmon2 using Python. Filters look for threshold of port counters. Over certain counts, filters report errors to on-call system administrators and modifies grid to show local host with issue.

  11. Performance of Waterless Concrete

    Science.gov (United States)

    Toutanji, Houssam; Evans, Steve; Grugel, Richard N.

    2010-01-01

    The development of permanent lunar bases is constrained by performance of construction materials and availability of in-situ resources. Concrete seems a suitable construction material for the lunar environment, but water, one of its major components, is an extremely scarce resource on the Moon. This study explores an alternative to hydraulic concrete by replacing the binding mix of concrete (cement and water) with sulfur. Sulfur is a volatile element on the lunar surface that can be extracted from lunar soils by heating. Sulfur concrete mixes were prepared to investigate the effect of extreme environmental conditions on the properties of sulfur concrete. A hypervelocity impact test was conducted, having as its target a 5-cm cubic sample of sulfur concrete. This item consisted of JSC-1 lunar regolith simulant (65%) and sulfur (35%). The sample was placed in the MSFC Impact Test Facility s Micro Light Gas Gun target chamber, and was struck by a 1-mm diameter (1.4e-03 g) aluminum projectile at 5.85 km/s. In addition, HZTERN code, provided by NASA was used to study the effectiveness of sulfur concrete when subjected to space radiation.

  12. Environmental performance reviews: Greece

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This report reviews Greece's environmental performance in the light of domestic objectives and international commitments. It is organised in three parts: Part 1 is entitled 'Pollution Control and Nature Conservation; and focuses on water, air management, and biodiversity and nature conservation; Part 2 is entitled 'Integration of Policies' and focuses on institutional aspects and on how policies concerning economics, coastal and urban management, and tourism are integrated with environmental policies; and Part 3 is entitled 'Co-operation with the International Community' and focuses on international environmental topics concerning Greece. In 1997, emissions of sulphur dioxide in Greece were twice the OECD Europe average per GDP, as well as being high in terms per capita. About 70% of these emissions come from power plants, largely fired with local lignite of poor quality. Of late, however, the use of lignite has levelled off, to the accompaniment of an increased use of natural gas. Moreover some units of the country's largest power station, Megalopolis, have recently been equipped for flue-gas desulphurization and two of the refineries have expanded their capacity for desulphurizing oil. Amongst recommendations made by the OECD is a programme for energy conservation and energy efficiency, promotion of natural gas and cleaner vehicles, and improved monitoring and enforcement of regulations. 17 figs., 31 tabs., 4 apps.

  13. Final Performance Report

    Energy Technology Data Exchange (ETDEWEB)

    Hsieh, S. T. [Tulane Univ., New Orleans, LA (United States)

    2013-08-31

    U.S./China Energy and Environmental Technology Center (EETC), Payson Center for International Development, Law School of Tulane University was officially established in 1997 with initial funds from private sector, US Environmental Protection Agency and the US Department of Energy (DOE.) Lately, DOE has provided EETC funds for operations with cost share from the Ministry of Science and Technology, China. EETC was created to facilitate the development of friendly, broad-based U.S./China relations. Tulane University signed the Memorandum of Understanding (MOU) with the Chinese People’s Institute of Foreign Affairs (1995) to promote the formation of Chinese partners for EETC. EETC’s original goal is to enhance the competitiveness of US clean fossil energy technology in China so that, as her economy expands, local and global environment are well protected. Specifically, through the demonstration and broadly deployment of US developed clean coal technology for power generation, transmission, and emission reductions in China. EETC is also focused on US industry partnerships for local economic development. One of the main the objectives of the EETC is to promote the efficient, responsible production and utilization of energy with a focus on clean fossil energy, promote US clean energy and environmental technologies, and encourage environmental performance while improving the quality of life in China. Another objective is to assist China with environmental and energy policy development and provide supports for China’s development with expertise (best practices) from US industry.

  14. Laser Lightcraft Performance

    Science.gov (United States)

    Chen, Yen-Sen; Liu, Jiwen; Wei, Hong

    2000-01-01

    The purpose of this study is to establish the technical ground for modeling the physics of laser powered pulse detonation phenomenon. The principle of the laser power propulsion is that when high-powered laser is focused at a small area near the surface of a thruster, the intense energy causes the electrical breakdown of the working fluid (e.g. air) and forming high speed plasma (known as the inverse Bremsstrahlung, IB, effect). The intense heat and high pressure created in the plasma consequently causes the surrounding to heat up and expand until the thrust producing shock waves are formed. This complex process of gas ionization, increase in radiation absorption and the forming of plasma and shock waves will be investigated in the development of the present numerical model. In the first phase of this study, laser light focusing, radiation absorption and shock wave propagation over the entire pulsed cycle are modeled. The model geometry and test conditions of known benchmark experiments such as those in Myrabo's experiment will be employed in the numerical model validation simulations. The calculated performance data will be compared to the test data.

  15. Aging and exercise performance.

    Science.gov (United States)

    Mahler, D A; Cunningham, L N; Curfman, G D

    1986-05-01

    Diverse physiologic changes occur in the oxygen transport system during the aging process. Physical performance and VO2max decline with age, but the changes may be attenuated by exercise training. Increased ventilation is required during exercise in order to compensate for reduced efficiency of gas exchange. Cardiovascular alterations include prolonged duration of myocardial contraction, a slightly reduced left ventricular ejection fraction during exercise, decreased heart rate during both submaximal and maximal exercise, and attenuation of myocardial response to beta-adrenergic stimulation. Cardiac output during exercise can be maintained in the elderly owing to a greater dependence on ventricular filling. Appropriate exercise training leads to enhanced efficiency of the lungs, heart, and skeletal muscles. These physiologic benefits contribute to an increase in functional capacity and an enhanced sense of well-being. Exercise testing is recommended for individuals who have cardiorespiratory symptoms and for those at risk for the development of coronary artery disease. Reasonable goals for an aerobic training program are continuous activity for 30 minutes at a moderate intensity of exertion at least 3 days per week. The intensity of exercise should be based on a prescribed training heart rate. The exercise prescription should be individualized and should incorporate one or more activities for optimal enjoyment and compliance. Opportunities and facilities for indoor exercise are important during inclement weather. Regular physical exercise is important at any age!

  16. MPQC: Performance Analysis and Optimization

    Energy Technology Data Exchange (ETDEWEB)

    Sarje, Abhinav [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Williams, Samuel [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Bailey, David [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2013-01-24

    MPQC (Massively Parallel Quantum Chemistry) is a widely used computational quantum chemistry code. It is capable of performing a number of computations commonly occurring in quantum chemistry. In order to achieve better performance of MPQC, in this report we present a detailed performance analysis of this code. We then perform loop and memory access optimizations, and measure performance improvements by comparing the performance of the optimized code with that of the original MPQC code. We observe that the optimized MPQC code achieves a significant improvement in the performance through a better utilization of vector processing and memory hierarchies.

  17. The performative turn in gerontology

    DEFF Research Database (Denmark)

    Fristrup, Tine

    2011-01-01

    Performativity has important implications for contemporary debates on ageing identities in ageing societies. Age performativity is a way in which identity may be seen as constructed in and through performance in contextualised settings offering subject positions people can take up, ignore or resist......, and in the end make their own. The age performativities will be elaborated in the framework of PerformAge and understood as a temporal and spatial theorising of ageing: the poetics of ageing. PerformAge is a way of figuring age performativities in social encounters textualised in poetic representations....

  18. Performance contracts for police forces

    OpenAIRE

    Ben Vollaard

    2003-01-01

    In 2003, the government will enter into performance contracts with each of the 25 regional police forces. The performance contracts establish a direct link between meeting a number of quantitative performance targets and financial incentives. A major improvement in police performance is necessary to meet the objective of 20 to 25 percent less criminal and disorderly behavior by 2006. A closer look at the performance contracts learns that they may not be the most appropriate policy instrument ...

  19. E-Commerce Performance. Shopping Cart Key Performance Indicators

    Directory of Open Access Journals (Sweden)

    Mihaela I. MUNTEAN

    2016-01-01

    Full Text Available In an e-commerce performance framework is important to identify the key performance indicators that measure success and together provide the greatest context into the business perfor-mance. Shopping carts are an essential part of ecommerce, a minimal set of key performance indicators being the subject of our debate. The theoretical approach is sustained by a case study, an e-shop implemented using PHP and MySQL, for simulating main business processes within the considered performance framework. Our approach opens a perspective for future research using additional indicators in order to properly evaluate the global performance of any e-shop.

  20. Forma e performance

    Directory of Open Access Journals (Sweden)

    Patricia Elizabeth Easterling

    2014-09-01

    Full Text Available Este artigo propõe uma revisão da tragédia grega, chamando a atenção para a necessidade de se abandonar o modelo evolutivo tradicional e entendê-las como essencialmente uma forma performática, em que o texto atende às necessidades de palco, e, em um esforço imaginativo, se ler as peças a partir, também, de seus elementos dêiticos e meta-narrativos, operação ilustrada através de uma análise de Medeia e As Troianas. Tradução: Ricardo Pinto de Souza(publicado originalmente em The Cambridge COmpanion to Greek TragedyAbstract: This paper proposes a revision of the Greek Tragedy calling for the need of leave behind the traditional evolutive model and emphasize the performatic nature of Greek Tragedy. Tragedy is an art-form in which text must re-spond to stage and performatic needs and, as consequence, demands from its reader an imaginative effort to consider its deictic and meta-narrative elements of essence to its understanding.Keywords: Greek Tragedy; Deixis; Performance; Medea; The Trojan Women Patricia Elizabeth Easterling é fellow da Academia Britânica para Humanidades e Ciências Sociais e do Newham College, primeira mulher em 450 anos a receber a prestigiosa cátedra de Professor Régio de Grego da Universidade de Cambridge (de 1994 até sua aposentadoria, em 2001, especialista na obra de Sófocles e organizadora de The Cambridge History of Classical Literature (com E. J. Kenney e The Cambridge Companion to Greek Tragedy. Livros: Sophocles: Trachiniae, Cambridge, 1982; Greek Religion and Society, ed. com J. V. Muir, 1984; The Cambridge History of Classical Literature, ed. com E. J. Kenney, 1994; The Cambridge Companion to Greek Tragedy, ed. , 1997; Greek and Roman Actors: Aspects of an Ancient Profession, ed. com Edith Hall, 2002. Ricardo Pinto de Souza é professor de Teoria Literária na Faculdade de Letras da UFRJ, onde leciona também no Programa de Pós-Graduação em Ciência da Literatura. Coordena o Laborat

  1. Using Technical Performance Measures

    Science.gov (United States)

    Garrett, Christopher J.; Levack, Daniel J. H.; Rhodes, Russel E.

    2011-01-01

    All programs have requirements. For these requirements to be met, there must be a means of measurement. A Technical Performance Measure (TPM) is defined to produce a measured quantity that can be compared to the requirement. In practice, the TPM is often expressed as a maximum or minimum and a goal. Example TPMs for a rocket program are: vacuum or sea level specific impulse (lsp), weight, reliability (often expressed as a failure rate), schedule, operability (turn-around time), design and development cost, production cost, and operating cost. Program status is evaluated by comparing the TPMs against specified values of the requirements. During the program many design decisions are made and most of them affect some or all of the TPMs. Often, the same design decision changes some TPMs favorably while affecting other TPMs unfavorably. The problem then becomes how to compare the effects of a design decision on different TPMs. How much failure rate is one second of specific impulse worth? How many days of schedule is one pound of weight worth? In other words, how to compare dissimilar quantities in order to trade and manage the TPMs to meet all requirements. One method that has been used successfully and has a mathematical basis is Utility Analysis. Utility Analysis enables quantitative comparison among dissimilar attributes. It uses a mathematical model that maps decision maker preferences over the tradeable range of each attribute. It is capable of modeling both independent and dependent attributes. Utility Analysis is well supported in the literature on Decision Theory. It has been used at Pratt & Whitney Rocketdyne for internal programs and for contracted work such as the J-2X rocket engine program. This paper describes the construction of TPMs and describes Utility Analysis. It then discusses the use of TPMs in design trades and to manage margin during a program using Utility Analysis.

  2. The Politics of Performance Measurement

    DEFF Research Database (Denmark)

    Bjørnholt, Bente; Larsen, Flemming

    2014-01-01

    Performance measurements are meant to improve public decision making and organizational performance. But performance measurements are far from always rational tools for problem solving, they are also political instruments. The central question addressed in this article is how performance...... measurement affects public policy. The aim is to conceptualize the political consequences of performance measurements and of special concern is how performance systems influence how political decisions are made, what kind of political decisions are conceivable, and how they are implemented. The literature...... on the utilization of evaluation and performance measurements is applied to analyse how performance measurements affect the political process of goal-setting, implementation and learning. The article concludes that performance measurements may have intended and unintended effects and they seem to have a retroactive...

  3. Performance management practices in public sector organizations : Impact on performance

    NARCIS (Netherlands)

    Verbeeten, Frank H.M.

    2008-01-01

    Purpose - The aim of this study is to investigate whether performance management practices affect performance in public sector organizations. Design/methodology/approach - Theoretically, the research project is based on economic as well as behavioral theories. The study distinguishes amongst

  4. Performance Measurement and Performance Information in New Democracies

    NARCIS (Netherlands)

    K. Nõmm (Külli); T. Randma-Liiv (Tiina)

    2012-01-01

    markdownabstract__Abstract__ This article explores the introduction of performance measurement tools in new democracies by presenting a qualitative study based on Estonian governmental documents and performance audits. A set of specific factors help to explain difficulties in

  5. Midshipmen Military Performance as an Indicator of Officer Fleet Performance

    National Research Council Canada - National Science Library

    Rogers, Jeff

    2003-01-01

    .... These processes culminate into a performance measure called the Military Performance grade. This research uses detailed literature reviews to support the operationalized model of the Naval Academy's midshipman development process...

  6. Peran Environmental Performance Terhadap Environmental Disclosure Dan Economic Performance

    OpenAIRE

    Yendrawati, Reni; Tarusnawati, Lalitya Reni

    2013-01-01

    This study aimed to determine the effect of environmental performance on environmental disclosure andeconomic performance, and also the effect of environmental disclosure on economic performance. The data wastaken from the annual report of 2009-2011companies listed on the Indonesian Stock Exchange and participatingin PROPER. This study used multiple regressions. Environmental performance results showed there wasa significant positive effect on environmental disclosure, environmental disclosur...

  7. Music Performance Trust Funds: Bringing Professional Performances to School.

    Science.gov (United States)

    Patchen, Jeffrey H.

    1985-01-01

    The Music Performance Trust Funds (MPTF) is a national agency that sponsors live musical performances in schools, hospitals, clinics, senior citizen centers, penal institutions, and the like. In this interview a trustee for MPTF talks about the group's history and its commitment to quality performances in the schools. (RM)

  8. Performance samples on academic tasks : improving prediction of academic performance

    NARCIS (Netherlands)

    Tanilon, Jenny

    2011-01-01

    This thesis is about the development and validation of a performance-based test, labeled as Performance Samples on academic tasks in Education and Child Studies (PSEd). PSEd is designed to identify students who are most able to perform the academic tasks involved in an Education and Child Studies

  9. Performance Management, Managerial Authority, and Public Service Performance

    DEFF Research Database (Denmark)

    Nielsen, Poul Aaes

    2014-01-01

    not follow automatically when performance management is adopted. This article examines whether increased managerial authority does indeed promote the effectiveness of performance management. The article relies on a 4-year panel on management and the performance of more than 45,000 students in 314 Danish...

  10. Cognitive performance modeling based on general systems performance theory.

    Science.gov (United States)

    Kondraske, George V

    2010-01-01

    General Systems Performance Theory (GSPT) was initially motivated by problems associated with quantifying different aspects of human performance. It has proved to be invaluable for measurement development and understanding quantitative relationships between human subsystem capacities and performance in complex tasks. It is now desired to bring focus to the application of GSPT to modeling of cognitive system performance. Previous studies involving two complex tasks (i.e., driving and performing laparoscopic surgery) and incorporating measures that are clearly related to cognitive performance (information processing speed and short-term memory capacity) were revisited. A GSPT-derived method of task analysis and performance prediction termed Nonlinear Causal Resource Analysis (NCRA) was employed to determine the demand on basic cognitive performance resources required to support different levels of complex task performance. This approach is presented as a means to determine a cognitive workload profile and the subsequent computation of a single number measure of cognitive workload (CW). Computation of CW may be a viable alternative to measuring it. Various possible "more basic" performance resources that contribute to cognitive system performance are discussed. It is concluded from this preliminary exploration that a GSPT-based approach can contribute to defining cognitive performance models that are useful for both individual subjects and specific groups (e.g., military pilots).

  11. Performance systems and social capital

    DEFF Research Database (Denmark)

    Rasmussen, Grane Mikael Gregaard; Edwards, Kasper

    2014-01-01

    from a study on implementation of a performance system in Danish construction. The results show causalities between implementing the performance system and the emergence of social capital in construction projects. Results indicate that performance systems and social capital is not mutually exclusive......Performance systems and social capital are considered mutually exclusive. Contemporary studies show that social capital is essential in generating performance improvement. This raises an important question: “How do performance systems and social capital correspond?” This study draws on findings...

  12. THE MEASURABILITY OF CONTROLLING PERFORMANCE

    Directory of Open Access Journals (Sweden)

    V. Laval

    2017-04-01

    Full Text Available The urge to increase the performance of company processes is ongoing. Surveys indicate however, that many companies do not measure the controlling performance with a defined set of key performance indicators. This paper will analyze three categories of controlling key performance indicators based on their degree of measurability and their impact on the financial performance of a company. Potential measures to optimize the performance of the controlling department will be outlined and put in a logical order. The aligning of the controlling activity with the respective management expectation will be discussed as a key success factor of this improvement project.

  13. 2014 Environmental Performance Index (EPI)

    Data.gov (United States)

    National Aeronautics and Space Administration — The 2014 Environmental Performance Index (EPI) ranks 178 countries on 20 performance indicators in the following 9 policy categories: health impacts, air quality,...

  14. 2016 Environmental Performance Index (EPI)

    Data.gov (United States)

    National Aeronautics and Space Administration — The 2016 Environmental Performance Index (EPI) ranks 180 countries on 20 performance indicators in the following 9 policy categories: health impacts, air quality,...

  15. Principles of Sonar Performance Modeling

    NARCIS (Netherlands)

    Ainslie, M.A.

    2010-01-01

    Sonar performance modelling (SPM) is concerned with the prediction of quantitative measures of sonar performance, such as probability of detection. It is a multidisciplinary subject, requiring knowledge and expertise in the disparate fields of underwater acoustics, acoustical oceanography, sonar

  16. Trinity Acceptance Tests Performance Summary.

    Energy Technology Data Exchange (ETDEWEB)

    Rajan, Mahesh [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-12-01

    Ensuring Real Applications perform well on Trinity is key to success. Four components: ASC applications, Sustained System Performance (SSP), Extra-Large MiniApplications problems, and Micro-benchmarks.

  17. IT Performance Dashboard: Systems Dashboard

    Data.gov (United States)

    Department of Veterans Affairs — The IT Performance Dashboard a trusted source for IT performance information across VA. This is available only on the VA intranet. The dashboard is a collection of...

  18. 2010 Environmental Performance Index (EPI)

    Data.gov (United States)

    National Aeronautics and Space Administration — The 2010 Environmental Performance Index (EPI) ranks 163 countries on environmental performance based on twenty-five indicators grouped within ten core policy...

  19. ATR Performance Estimation Seed Program

    Science.gov (United States)

    2015-09-28

    19b. TELEPHONE NUMBER (Include area code) 09/28/2015 Research Performance Report July 2014 - June 2015 ATR Performance Estimation Seed Program Cook...Report: ATR Performance Estimation Seed Program Daniel A. Cook Georgia Tech Research Institute Sensors and Electromagnetic Applications Laboratory...term seed program to expand the Navy’s efforts in performance prediction for MCM. The team included individuals from ARL/PSU, APL-UW, GTRI, and NSWC

  20. Theory of Performance Participation Strategies

    OpenAIRE

    Julia Kraus; Philippe Bertrand; Rudi Zagst

    2013-01-01

    The purpose of this article is to introduce, analyze and compare two performance participation methods based on a portfolio consisting of two risky assets: Option-Based Performance Participation (OBPP) and Constant Proportion Performance Participation (CPPP). By generalizing the provided guarantee to a participation in the performance of a second risky underlying, the new strategies allow to cope with well-known problems associated with standard portfolio insurance methods, like e.g. the CPPI...

  1. Stakeholder relations and financial performance

    NARCIS (Netherlands)

    Scholtens, B.; Zhou, Y.

    2008-01-01

    We analyze how shareholder performance can be associated with stakeholder relations. As such, we try to find out whether there is an association between financial performance and stakeholder relations with respect to different theoretical notions about the firm. Financial performance is

  2. Creating an Expressive Performance Mindset

    Science.gov (United States)

    Broomhead, Paul; Skidmore, Jon B.

    2014-01-01

    Students in performance situations sometimes experience physiological symptoms that inhibit their ability to perform as expressively as they otherwise might possess the understanding and ability to do. As students set out to perform with an expressive mindset, the brain's limbic system may detect some perceived danger in the situation and…

  3. Strategic Measures of Teacher Performance

    Science.gov (United States)

    Milanowski, Anthony

    2011-01-01

    Managing the human capital in education requires measuring teacher performance. To measure performance, administrators need to combine measures of practice with measures of outcomes, such as value-added measures, and three measurement systems are needed: classroom observations, performance assessments or work samples, and classroom walkthroughs.…

  4. Diet Quality and Academic Performance

    Science.gov (United States)

    Florence, Michelle D.; Asbridge, Mark; Veugelers, Paul J.

    2008-01-01

    Background: Although the effects of nutrition on health and school performance are often cited, few research studies have examined the effect of diet quality on the academic performance of children. This study examines the association between overall diet quality and academic performance. Methods: In 2003, 5200 grade 5 students in Nova Scotia,…

  5. Looming Questions in Performance Pay

    Science.gov (United States)

    Gratz, Donald B.

    2010-01-01

    When proposing performance pay for teachers, reformers first must answer three questions: What is the definition of teacher performance? What is the definition of student performance? and What are the goals of schooling? Reformers also need to examine the assumptions that guide their proposals and prepare to deal with the implementation issues…

  6. Debt Management Performance Assessment : Nigeria

    OpenAIRE

    World Bank

    2012-01-01

    The DeMPA is a methodology for assessing public debt management performance through a comprehensive set of indicators spanning the full range of government debt management functions. The DeMPA tool presents debt performance indicators along with a scoring methodology. This report pertains to a debt management performance assessment of Nigeria in 2012. Areas with very high scores include th...

  7. Elliptical Orbit Performance Computer Program

    Science.gov (United States)

    Myler, T.

    1984-01-01

    Elliptical Orbit Performance (ELOPE) computer program for analyzing orbital performance of space boosters uses orbit insertion data obtained from trajectory simulation to generate parametric data on apogee and perigee altitudes as function of payload data. Data used to generate presentation plots that display elliptical orbit performance capability of space booster.

  8. Strategy, culture and innovation performance

    DEFF Research Database (Denmark)

    do Nascimento Gambi, Lillian; Boer, Harry

    2015-01-01

    Firms strive for improving their performance, and organizational culture has been recognized as an important driver of better performance. In parallel, strategy is viewed as an important contextual variable that influences organizational culture as well as performance. This study has two main goals......: (1) investigating the relationship between strategic practices and innovation performance, and (2) determining if strategy has a direct and/or an indirect, culture-mediated effect on innovation performance, and if this effect varies across strategic practices and culture profiles. The research model...

  9. Statistical modeling of program performance

    Directory of Open Access Journals (Sweden)

    A. P. Karpenko

    2014-01-01

    Full Text Available A task of evaluation of program performance often occurs in the process of design of computer systems or during iterative compilation. A traditional way to solve this problem is emulation of program execution on the target system. A modern alternative approach to evaluation of program performance is based on statistical modeling of program performance on a computer under investigation. This statistical method of modeling program performance called Velocitas was introduced in this work. The method and its implementation in the Adaptor framework were presented. Investigation of the method's effectiveness showed high adequacy of program performance prediction.

  10. Diet quality and academic performance.

    Science.gov (United States)

    Florence, Michelle D; Asbridge, Mark; Veugelers, Paul J

    2008-04-01

    Although the effects of nutrition on health and school performance are often cited, few research studies have examined the effect of diet quality on the academic performance of children. This study examines the association between overall diet quality and academic performance. In 2003, 5200 grade 5 students in Nova Scotia, Canada, and their parents were surveyed as part of the Children's Lifestyle and School-performance Study. Information on dietary intake, height, and weight and sociodemographic variables were linked to results of a provincial standardized literacy assessment. Diet Quality Index-International was used to summarize overall diet quality. Multilevel regression methods were used to examine the association between indicators of diet quality and academic performance while adjusting for gender and socioeconomic characteristics of parents and residential neighborhoods. Across various indicators of diet quality, an association with academic performance was observed. Students with decreased overall diet quality were significantly more likely to perform poorly on the assessment. Girls performed better than boys as did children from socioeconomically advantaged families. Children attending better schools and living in wealthy neighborhoods also performed better. These findings demonstrate an association between diet quality and academic performance and identify specific dietary factors that contribute to this association. Additionally, this research supports the broader implementation and investment in effective school nutrition programs that have the potential to improve student access to healthy food choices, diet quality, academic performance, and, over the long term, health.

  11. High Performance Computing at NASA

    Science.gov (United States)

    Bailey, David H.; Cooper, D. M. (Technical Monitor)

    1994-01-01

    The speaker will give an overview of high performance computing in the U.S. in general and within NASA in particular, including a description of the recently signed NASA-IBM cooperative agreement. The latest performance figures of various parallel systems on the NAS Parallel Benchmarks will be presented. The speaker was one of the authors of the NAS (National Aerospace Standards) Parallel Benchmarks, which are now widely cited in the industry as a measure of sustained performance on realistic high-end scientific applications. It will be shown that significant progress has been made by the highly parallel supercomputer industry during the past year or so, with several new systems, based on high-performance RISC processors, that now deliver superior performance per dollar compared to conventional supercomputers. Various pitfalls in reporting performance will be discussed. The speaker will then conclude by assessing the general state of the high performance computing field.

  12. Dry Process Fuel Performance Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Myung Seung; Song, K. C.; Moon, J. S. and others

    2005-04-15

    The objective of the project is to establish the performance evaluation system of DUPIC fuel during the Phase II R and D. In order to fulfil this objectives, irradiation test of DUPIC fuel was carried out in HANARO using the non-instrumented and SPND-instrumented rig. Also, the analysis on the in-reactor behavior analysis of DUPIC fuel, out-pile test using simulated DUPIC fuel as well as performance and integrity assessment in a commercial reactor were performed during this Phase. The R and D results of the Phase II are summarized as follows : - Performance evaluation of DUPIC fuel via irradiation test in HANARO - Post irradiation examination of irradiated fuel and performance analysis - Development of DUPIC fuel performance code (modified ELESTRES) considering material properties of DUPIC fuel - Irradiation behavior and integrity assessment under the design power envelope of DUPIC fuel - Foundamental technology development of thermal/mechanical performance evaluation using ANSYS (FEM package)

  13. Musical Formalism and Political Performances

    Directory of Open Access Journals (Sweden)

    Jonathan A. Neufeld

    2009-01-01

    Full Text Available Musical formalism, which strictly limits the type of thing any description of the music can tell us, is ill-equipped to account for contemporary performance practice. If performative interpretations are in a position to tell us something about musical works—that is if performance is a kind of description, as Peter Kivy argues—then we have to loosen the restrictions on notions of musical relevance to make sense of performance. I argue that musical formalism, which strictly limits the type of thing any description of the music can tell us, is inconsistent with Kivy's quite compelling account of performance. This shows the difficulty that actual performances pose to overly rigid conceptions of music. Daniel Barenboim's unannounced performance of Wagner in Israel in 2001 shows that the problem of the boundaries of musical relevance is no mere philosophical puzzle. It is a pressing problem in the musical public sphere.

  14. Performance scan thermal climate. Assessment of the energy performance level; Performance scan thermisch klimaat. Beoordeling energieprestatieniveau

    Energy Technology Data Exchange (ETDEWEB)

    Rouleaux, W. [DHV Bouw en Industrie, Amersfoort (Netherlands)

    2004-11-01

    By means of the performance scan the indoor climate and the energetic performance level of a building can be assessed. The most important outcome of the scan is increase of the productivity. [Dutch] Met de performance scan kan het binnenklimaat en het energetisch prestatieniveau van een gebouw worden beoordeeld. De belangrijkste uitkomst van de scan is verhoging van de productiviteit.

  15. Performance measurement and performance management of innovative products

    OpenAIRE

    Dickinson, Graham

    2008-01-01

    Increasing interest is being shown in performance measurement, in both the academic literature and by practitioners. When implementing innovative products, organisations are facing issues of how to measure and manage the performance of the products concerned and how to do so in a worthwhile way. Reviewing existing literature suggests that there has been limited research on the value of performance measurement and management processes and indeed little conceptual distinction has been made betw...

  16. Performance samples on academic tasks: improving prediction of academic performance

    OpenAIRE

    Tanilon, Jenny

    2011-01-01

    This thesis is about the development and validation of a performance-based test, labeled as Performance Samples on academic tasks in Education and Child Studies (PSEd). PSEd is designed to identify students who are most able to perform the academic tasks involved in an Education and Child Studies bridging program. Many Dutch universities set up bridging programs that aim to prepare students with non-university degrees in the Netherlands for Master’s programs at the university level. Some univ...

  17. Interactions between performance pressure, performance streaks, and attentional focus.

    Science.gov (United States)

    Gray, Rob; Allsop, Jonathan

    2013-08-01

    How is performance under pressure influenced by the history of events that precede it, and how does the pressure outcome influence the series of events that follow? A baseball batting simulation was used with college players to investigate these questions. In Experiment 1, the difficulty of the simulation was first adaptively adjusted to equate performance level. Batters next completed 20 at-bats used to classify them into one of three performance groups (normal, cold streak, or hot streak) followed by a one at-bat pressure condition. Finally, performance was evaluated over a period of 20 postpressure at-bats. In Experiment 2, a series of secondary tasks were added to assess attentional focus. In both experiments, whether batters succeeded or failed under pressure was significantly related to their performance history immediately before the pressure event, with the normal group having the poorest pressure performance. Performance postpressure was significantly related to both the pressure outcome and prepressure performance. These performance effects were related to changes in the batter's attentional focus as shown by changes in secondary task accuracy.

  18. High Performance Flexible Thermal Link

    Science.gov (United States)

    Sauer, Arne; Preller, Fabian

    2014-06-01

    The paper deals with the design and performance verification of a high performance and flexible carbon fibre thermal link.Project goal was to design a space qualified thermal link combining low mass, flexibility and high thermal conductivity with new approaches regarding selected materials and processes. The idea was to combine the advantages of existing metallic links regarding flexibility and the thermal performance of high conductive carbon pitch fibres. Special focus is laid on the thermal performance improvement of matrix systems by means of nano-scaled carbon materials in order to improve the thermal performance also perpendicular to the direction of the unidirectional fibres.One of the main challenges was to establish a manufacturing process which allows handling the stiff and brittle fibres, applying the matrix and performing the implementation into an interface component using unconventional process steps like thermal bonding of fibres after metallisation.This research was funded by the German Federal Ministry for Economic Affairs and Energy (BMWi).

  19. Music in Kamigata Rakugo Performance

    Directory of Open Access Journals (Sweden)

    Catherine Hallett

    2014-01-01

    Full Text Available Rakugo is the Japanese tradition of staged comic storytelling presented by highly trained hanashika storytellers associated with small urban variety theatres called yose, found in the Kamigata and Edo regions. Although yose theatres are associated with spoken rather than musical events, music is an integral component of Kamigata rakugo performance. It is central both to the rendering of a storyteller’s performance and to creating the overall atmosphere in the yose theatre. This paper addresses the lack of detailed research on music in Kamigata rakugo performance, particularly in English. It demonstrates and documents the centrality of music in Kamigata rakugo performance, specifically the way that this music, which is rich in symbolism, aids a storyteller’s performance and is intrinsically bound up in the hierarchical structure of the storytellers and yose-bayashi ensemble musicians. It focuses on how the music functions in the performances, transmitting meanings and supporting the social structure of the ensemble.

  20. Enhancing importance-performance analysis

    DEFF Research Database (Denmark)

    Eskildsen, Jacob Kjær; Kristensen, Kai

    2006-01-01

    Purpose: The interpretation of the importance/performance map is based on an assumption of independence between importance and performance but many studies question the validity of this assumption. The aim of this research is to develop a new typology for job satisfaction attributes as well...... in more than one subset. This is a problem with the data generating process that to some extent might influence the analysis. Practical implications: Profound impact on the way that the importance/performance map should be interpreted since non-proportional attributes will move both vertically as well...... as horizontally in the traditional importance/performance map as performance changes. Originality/value: This paper gives a theoretical explanation for the presence of non-proportional satisfiers and develops a new importance/performance map that takes the presence of non-proportional satisfiers into account....

  1. Perform or Else: The Performative Enhancement of Teacher Professionalism

    Science.gov (United States)

    Liew, Warren Mark

    2012-01-01

    The Singapore Ministry of Education's Enhanced Performance Management System (EPMS) was instituted in 2005 as a system of professional accountability to enhance the standards and stakes of teacher professionalism in schools. This essay explores how the EPMS, with its underlying paradigm of performance management, functions as a "technology of…

  2. Predicting performance : relative importance of students' background and past performance

    NARCIS (Netherlands)

    Stegers-Jager, Karen M.; Themmen, Axel P. N.; Cohen-Schotanus, Janke; Steyerberg, Ewout W.

    ContextDespite evidence for the predictive value of both pre-admission characteristics and past performance at medical school, their relative contribution to predicting medical school performance has not been thoroughly investigated. ObjectivesThis study was designed to determine the relative

  3. The Effect of Subconscious Performance Goals on Academic Performance

    Science.gov (United States)

    Bipp, Tanja; Kleingeld, Ad; van Mierlo, Heleen; Kunde, Wilfried

    2017-01-01

    We investigated the impact of subconscious goals on academic performance in two field experiments. We show that unobtrusive priming of goals with regard to achievement motivation by means of a photograph improves performance in different educational contexts. High-school students who were exposed to an achievement-related photograph achieved…

  4. Performance-vested Stock Options and Pay-Performance Sensitivity

    NARCIS (Netherlands)

    Kuang, Y.; Qin, B.

    2006-01-01

    The paper investigates the incentive effects of performance-vested stock options (PVSOs) in aligning management interests with shareholder wealth. Performance targets attached to option vesting would prevent executives from receiving rewards from outcomes that are unaffected by their effort.Such

  5. Performance management when innovation and learning become critical performance indicators

    NARCIS (Netherlands)

    Molleman, E.; Timmerman, H.

    2003-01-01

    If the organization's leading performance indicators shift towards innovation and the creation of knowledge, this will result in more non-routine work and a higher level of interdependency among workers. We argue that a contingent performance management (PM) system has to focus on Learning and group

  6. Performing Leadership: Use of Performative Inquiry in Teaching Organizational Theories

    Science.gov (United States)

    Nilson, Michelle; Fels, Lynn; Gopaul, Bryan

    2016-01-01

    This research explores the various ways in which performative inquiry was implemented in a graduate organizational theories course within an educational leadership cohort at a medium-sized urban Canadian research university. Drawing on Fink's framework for significant learning experiences, the researchers used performative inquiry to enact the…

  7. Computer Architecture Performance Evaluation Methods

    CERN Document Server

    Eeckhout, Lieven

    2010-01-01

    Performance evaluation is at the foundation of computer architecture research and development. Contemporary microprocessors are so complex that architects cannot design systems based on intuition and simple models only. Adequate performance evaluation methods are absolutely crucial to steer the research and development process in the right direction. However, rigorous performance evaluation is non-trivial as there are multiple aspects to performanceevaluation, such as picking workloads, selecting an appropriate modeling or simulation approach, running the model and interpreting the results usi

  8. Peer effects in academic performance

    OpenAIRE

    Hayashi, Ryohei

    2016-01-01

    This paper deals with the data of dormitory students in National Institute of Technology, Kagoshima College to demonstrate the existence of peer effects in academic performance. The data have unique advantages to avoid the difficulties of the self-selection problem and reflection problem. The data shows freshmen's academic performance and previous year's junior high school records, and roommate's previous year's academic performance for using an instrumental variable method. The results of my...

  9. PROCESS CONCEPT TO PERFORMANCE MANAGEMENT

    OpenAIRE

    Khourshed, Nevien F.

    2012-01-01

    In recent years many organisations have been busy implementing new or improved performance management systems. Recent research has shown that the regular use of these systems leads to better organisational results. There is however little knowledge about the actual mechanisms which cause the positive effects of performance management. Consequently, the objective of this paper is to create a clear focus on performance management process and illustrate that it is needed to design a step b...

  10. Case Study on Logistics Performance

    OpenAIRE

    Shahryar Sorooshian; Manimekalai Jambulingam; Javad Dodangeh

    2013-01-01

    The paper presents research carried out at a medium‐size manufacturing organization in east Asia. The study tries to highlight the importance of supply chain management; specifically, our aim for this study is to understand logistics and performance measurement in the logistics and supply chain, and we include a theoretical discussion of online data collected and a case study of the logistic performance of a real organization. The study also examines the performance of the selected company, i...

  11. Measuring Business Real Property Performance

    OpenAIRE

    Hugh O. Nourse

    1994-01-01

    A cross-case comparison of eleven firms was undertaken to learn how real estate property performance is measured and monitored for managerial feedback to make real estate decisions that will cause property performance to support overall corporate strategic goals. Firms with tight links between real estate operations and corporate strategy usually have a facility committee of operating, finance, and real estate managers measuring and monitoring performance, using different measures for differe...

  12. Theory of Performance Participation Strategies

    OpenAIRE

    Kraus, J.; Bertrand, P.; Zagst, R.

    2016-01-01

    The purpose of this article is to introduce, analyze and compare two performance participation methods based on a portfolio consisting of two risky assets: Option-Based Performance Participation (OBPP) and Constant Proportion Performance Participation (CPPP). In contrast to standard portfolio insurance strategies, like OBPI and CPPI, the minimum guaranteed portfolio value at the end of the investment horizon is not deterministic anymore, but subject to systematic risk instead. More precisely,...

  13. THE IMPORTANCE OF MEASURING INDIVIDUAL PERFORMANCE TO INCREASE ORGANIZATIONAL PERFORMANCE

    Directory of Open Access Journals (Sweden)

    Ecaterina Livia TĂTAR

    2011-01-01

    Full Text Available Management theory and practice suggest a wide range of instruments used in organizations in order to measure performance, whether individual or organizational. The purpose of this paper is to mention some of these tools, with an emphasis on the balanced scorecard. Although numerous organizations have adopted the balanced scorecard as a means to increase organizational performance, few of them have succeeded in making it really work. Moreover, individual performance appraisal is often regarded as a coercive instrument rather than a procedure meant to foster the employee’s performance which, in turn, should contribute to enhancing the organization’s overall performance. The hereby article aims at highlighting some of the advantages, as well as shortcomings of the balanced scorecard, followed by drawing conclusions regarding the way in which the balanced scorecard can and must contribute to organization’s well being.

  14. Probabilistic performance-based design for high performance control systems

    Science.gov (United States)

    Micheli, Laura; Cao, Liang; Gong, Yongqiang; Cancelli, Alessandro; Laflamme, Simon; Alipour, Alice

    2017-04-01

    High performance control systems (HPCS) are advanced damping systems capable of high damping performance over a wide frequency bandwidth, ideal for mitigation of multi-hazards. They include active, semi-active, and hybrid damping systems. However, HPCS are more expensive than typical passive mitigation systems, rely on power and hardware (e.g., sensors, actuators) to operate, and require maintenance. In this paper, a life cycle cost analysis (LCA) approach is proposed to estimate the economic benefit these systems over the entire life of the structure. The novelty resides in the life cycle cost analysis in the performance based design (PBD) tailored to multi-level wind hazards. This yields a probabilistic performance-based design approach for HPCS. Numerical simulations are conducted on a building located in Boston, MA. LCA are conducted for passive control systems and HPCS, and the concept of controller robustness is demonstrated. Results highlight the promise of the proposed performance-based design procedure.

  15. High-performance sports medicine

    National Research Council Canada - National Science Library

    Speed, Cathy

    2013-01-01

    High performance sports medicine involves the medical care of athletes, who are extraordinary individuals and who are exposed to intensive physical and psychological stresses during training and competition...

  16. Performance Degradation of LSCF Cathodes

    Energy Technology Data Exchange (ETDEWEB)

    Alinger, Matthew

    2013-09-30

    This final report summarizes the progress made during the October 1, 2008 - September 30, 2013 period under Cooperative Agreement DE-NT0004109 for the U. S. Department of Energy/National Energy Technology Laboratory (USDOE/NETL) entitled “Performance Degradation of LSCF Cathodes”. The primary objective of this program is to develop a performance degradation mitigation path for high performing, cost-effective solid oxide fuel cells (SOFCs). Strategies to mitigate performance degradation are developed and implemented. In addition, thermal spray manufacturing of SOFCs is explored. Combined, this work establishes a basis for cost-effective SOFC cells.

  17. Computer-Related Task Performance

    DEFF Research Database (Denmark)

    Longstreet, Phil; Xiao, Xiao; Sarker, Saonee

    2016-01-01

    The existing information system (IS) literature has acknowledged computer self-efficacy (CSE) as an important factor contributing to enhancements in computer-related task performance. However, the empirical results of CSE on performance have not always been consistent, and increasing an individual......'s CSE is often a cumbersome process. Thus, we introduce the theoretical concept of self-prophecy (SP) and examine how this social influence strategy can be used to improve computer-related task performance. Two experiments are conducted to examine the influence of SP on task performance. Results show...

  18. 2008 Environmental Performance Index (EPI)

    Data.gov (United States)

    National Aeronautics and Space Administration — The 2008 Environmental Performance Index (EPI) centers on two broad environmental protection objectives: (1) reducing environmental stresses on human health, and (2)...

  19. Performance

    Directory of Open Access Journals (Sweden)

    M. Rabie

    2016-04-01

    The design of hybrid MSE/SN walls is complicated as it is a composite of two different reinforcement techniques, traditional limit equilibrium approaches cannot be used alone for design of such walls, it shall be supported by numerical methods for estimation of the global factor of safety and failure surface. The limit equilibrium approaches can be used for the estimation of internal stability and facing connection for both soil nails and mechanically stabilized walls.

  20. The Relationship Between Social Performance and Corporate Financial Performance

    Directory of Open Access Journals (Sweden)

    Hamidreza Salmani Mojaveri

    2016-09-01

    Full Text Available This study investigates the relationship between social performance and corporate financial performance based on the information of companies listed in Tehran Stock Exchange - Iran. Today, economic entity has to identify the needs of their surrounding environment and community and in general interested parties to continue their survival and link with executive operation of the manufacturing of their products and by explaining the necessities of community provide the best services and achieve their organizational goals by selling more products. Overall, the process to identify community needs and interested parties and surrounding environment and provide services to them placed in social performance framework which is considered as the important issues to achieve success for organizations in today's competitive world. Therefore, we can say that the companies which do better their social functions financially might be in a desirable place than other competitor. In this study have been selected 90 companies of Tehran stock exchange based on elimination sampling and in order to investigate whether good social performance also leads to better financial performance. Financial variables are ROA and ROE and social variables contain five dimensions of Mark vinola model which obtain from tracking in financial statements and notes and based on score between -2 and +2. Finally, we conclude that there is no significant relationship between the social performance and corporate financial performance.

  1. CAUL's Interest in Performance Measurement.

    Science.gov (United States)

    Byrne, Alex

    1997-01-01

    The Council of Australian University Librarians (CAUL) has extended its commitment to academic library performance measurement with the publication of the first three CAUL Performance Indicators, focusing on library/clientele congruence, document delivery quality, and the proportion of sought material obtained. All have been applied effectively in…

  2. Directing Performers for the Cameras.

    Science.gov (United States)

    Wilson, George P., Jr.

    An excellent way for an undergraduate, novice director of television and film to pick up background experience in directing performers for cameras is by participating in nonbroadcast-film activities, such as theatre, dance, and variety acts, both as performer and as director. This document describes the varieties of activities, including creative,…

  3. Performance management for academic researchers

    DEFF Research Database (Denmark)

    Jacobsen, Christian Bøtcher; Andersen, Lotte Bøgh

    2014-01-01

    The ability to design and implement performance management systems that motivate employees to high performance has become pivotal for many public leaders. Many public organizations use command systems which are based on the threat of sanctions, but our knowledge on the effects of such systems...

  4. Circadian rhythmicity of cognitive performance

    Directory of Open Access Journals (Sweden)

    Schnupp Thomas

    2017-09-01

    Full Text Available It was investigated whether cognitive performance shows a circadian rhythm during a 50 h-long forced desynchrony sleep-wake-schedule. We asked whether it would be possible to estimate the circadian period of cognitive performance under such circumstances and how strong it correlates to subjective sleepiness rating as well as body temperature.

  5. Portfolio optimization and performance evaluation

    DEFF Research Database (Denmark)

    Juhl, Hans Jørn; Christensen, Michael

    2013-01-01

    customer portfolios are determined, and it is shown how marketing decision-makers can use this information in their marketing strategies to optimize the revenue growth of the company. Finally, our analysis is the first analysis which applies portfolio based methods to measure customer performance......, and it is shown how these performance measures complement the optimization analysis....

  6. Psychosocial risks and job performance

    NARCIS (Netherlands)

    Klein Hesselink, J.; Oeij, P.; Kraan, K.O.

    2014-01-01

    In this article, we concentrate on explaining job performance from the perspective of psychosocial risks in the work environment. Many risks may hinder good job performance. The article does not concentrate on physical (such as, carrying heavy loads) or environmental risks (such as, extreme heat or

  7. Managing Performance to Change Behavior

    Science.gov (United States)

    Denisi, Angelo S.

    2011-01-01

    Performance appraisal systems are often considered primarily in their role as criterion measures for validation studies. Even when they are considered in other organizational roles, there has traditionally been a strong focus on improving the accuracy of the appraisals. The present article argues that the proper focus of performance appraisal is…

  8. JEM-X inflight performance

    DEFF Research Database (Denmark)

    Brandt, Søren Kristian; Budtz-Jørgensen, Carl; Lund, Niels

    2003-01-01

    We summarize the inflight performance of JEM-X, the X-ray monitor on the INTEGRAL mission during the initial ten months of operations. The JEM-X instruments have now been tuned to stable operational conditions. The performance is found to be close to the pre-launch expectations. The ground...

  9. Performance assessment of housing associations

    NARCIS (Netherlands)

    Van Overmeeren, A.J.; Gruis, V.H.; Haffner, M.E.A.

    2009-01-01

    This article analyzes the function, design, and effects of a method to assess the performance of housing associations in the Netherlands. First, the roles of performance assessment are discussed from three perspectives: the association as an agent for the central government; the association as a

  10. Performance Analysis in Elite Sports

    NARCIS (Netherlands)

    Talsma, Bertus Gatze

    2013-01-01

    The central theme of this dissertation concerns the development of techniques for analyzing and comparing performances of elite sportsmen. When performances are delivered under varying circumstances, or are influenced by other factors than the athletes' abilities, a fair comparison, for instance

  11. The Arousal-Performance Relationship.

    Science.gov (United States)

    Wrisberg, Craig A.

    1994-01-01

    One theme in discussing physical activity and stress is the relationship between emotional arousal and motor performance. Different research models have produced converging evidence for the notion that motor performance relates to a state of optimal arousal. Themes emerging from the literature and recommendations for future consideration are…

  12. Managing organizational performance in Africa

    DEFF Research Database (Denmark)

    Kuada, John

    2012-01-01

    Discusses the interplay of political, economic, social and cultural factors in the management of the performance of public and private organizations in Africa......Discusses the interplay of political, economic, social and cultural factors in the management of the performance of public and private organizations in Africa...

  13. Ketogenic diets and physical performance

    Directory of Open Access Journals (Sweden)

    Phinney Stephen D

    2004-08-01

    Full Text Available Abstract Impaired physical performance is a common but not obligate result of a low carbohydrate diet. Lessons from traditional Inuit culture indicate that time for adaptation, optimized sodium and potassium nutriture, and constraint of protein to 15–25 % of daily energy expenditure allow unimpaired endurance performance despite nutritional ketosis.

  14. High-Performance Operating Systems

    DEFF Research Database (Denmark)

    Sharp, Robin

    1999-01-01

    Notes prepared for the DTU course 49421 "High Performance Operating Systems". The notes deal with quantitative and qualitative techniques for use in the design and evaluation of operating systems in computer systems for which performance is an important parameter, such as real-time applications......, communication systems and multimedia systems....

  15. Ketogenic diets and physical performance

    Directory of Open Access Journals (Sweden)

    Phinney SD

    2004-08-01

    Full Text Available Impaired physical performance is a common but not obligate result of a low carbohydrate diet. Lessons from traditional Inuit culture indicate that time for adaptation, optimized sodium and potassium nutriture, and constraint of protein to 15-25 % of daily energy expenditure allow unimpaired endurance performance despite nutritional ketosis.

  16. Bank performance and corporate culture

    NARCIS (Netherlands)

    Stentella Lopes, F.S.

    2015-01-01

    This thesis has three chapters and focuses on the performance of banks and on corporate culture. The first two chapters focus on bank performance and economic expectations. Specifically, the first chapter sheds light on the consistency between investors’ reaction to merger announcement and bankers’

  17. Performance optimization of marine propellers

    Directory of Open Access Journals (Sweden)

    Chang-Sup Lee

    2010-12-01

    In this paper, a design method for increasing performance of the marine propellers including the WCT propeller is suggested. It is described to maximize the performance of the propeller by adjusting expanded areas of the propeller blade. Results show that efficiency can be increased up to over 2% through the suggested design method.

  18. Performance of Existing Hydrogen Stations

    Energy Technology Data Exchange (ETDEWEB)

    Sprik, Samuel [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Kurtz, Jennifer M [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Ainscough, Christopher D [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Saur, Genevieve [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Peters, Michael C [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-12-01

    In this presentation, the National Renewable Energy Laboratory presented aggregated analysis results on the performance of existing hydrogen stations, including performance, operation, utilization, maintenance, safety, hydrogen quality, and cost. The U.S. Department of Energy funds technology validation work at NREL through its National Fuel Cell Technology Evaluation Center (NFCTEC).

  19. Performance Appraisal Applied to Leadership

    Science.gov (United States)

    Jefferson, Anne L.

    2010-01-01

    Performance appraisal is a measurement process of how well an individual is doing her or his job. In most organisations, this appraisal is an annual event. Generally, it is done to encourage job performance, to flag areas that need attention, to inform both parties as to expectations. Much of the literature speaks to this process in terms of the…

  20. Performance Evaluation of Constrained Portfolios

    NARCIS (Netherlands)

    I. Pouchkarev (Igor)

    2005-01-01

    textabstractConventional performance evaluation methods strongly differentiate between the universe which is used for portfolio construction, and the universe which is used for the performance evaluation. Whilst by composing the portfolio we consider the complete opportunity set, in the last case we