Science.gov

Sample records for portfolio standards greenhouse

  1. Impacts of a 10% Renewable Portfolio Standard

    EIA Publications

    2002-01-01

    This service report addresses the renewable portfolio standard provision of S. 1766. At Senator Murkowski's request it also includes an analysis of the impacts of a renewable portfolio standard (RPS) patterned after the one called for in S. 1766, but where the required share is based on a 20% RPS by 2020 rather than the 10% RPS called for in S. 1766.

  2. Impacts of a 10% Renewable Portfolio Standard

    EIA Publications

    2002-01-01

    This service report addresses the renewable portfolio standard provision of S. 1766. At Senator Murkowski's request it also includes an analysis of the impacts of a renewable portfolio standard (RPS) patterned after the one called for in S. 1766, but where the required share is based on a 20% RPS by 2020 rather than the 10% RPS called for in S. 1766.

  3. Impacts of a 15% Renewable Portfolio Standard

    EIA Publications

    2007-01-01

    This analysis responds to a request from Senator Jeff Bingaman that the Energy Information Administration (EIA) analyze a renewable portfolio standard (RPS) requiring that 15% of U.S. electricity sales be derived from qualifying renewable energy resources.

  4. An evaluation of a standards based portfolio.

    PubMed

    Gallagher, P

    2001-04-01

    In undergraduate and postgraduate nursing studies, the essay type assignment is commonly used to assess student learning. The literature suggests that of the alternatives for the assessment of learning, the use of portfolios may be an effective tool. A portfolio is generally conceptualized as a collection of the students best work or a collection of work that evidences incremental development. For a particular unit of learning, 'Nursing Business', second year undergraduate students in the Bachelor of Nursing programme were required to complete a portfolio. The assessment directed the students to meet specific criteria which in turn reflected the learning outcomes. Therefore the portfolio in this study is more appropriately described as a standards based portfolio (SBP). A SBP is a series of student work that seeks to address pre-determined learning outcomes. This study is an evaluation of student perceptions of a SPB and of interest to the study was the relationship between theory and practice, the availability of resources to complete the assignment and the contribution the portfolio made to the process of learning. Copyright 2001 Harcourt Publishers Ltd.

  5. An evaluation of a standards based portfolio.

    PubMed

    Gallagher, P

    2001-07-01

    In undergraduate and postgraduate nursing studies, the essay type assignment is commonly used to assess student learning. The literature suggests that of the alternatives for the assessment of learning, the use of portfolios may be an effective tool. A portfolio is generally conceptualized as a collection of the students best work or a collection of work that evidences incremental development. For a particular unit of learning, 'Nursing Business', second year undergraduate students in the Bachelor of Nursing programme were required to complete a portfolio. The assessment directed the students to meet specific criteria which in turn reflected the learning outcomes. Therefore the portfolio in this study is more appropriately described as a standards based portfolio (SBP). A SBP is a series of student work that seeks to address pre-determined learning outcomes. This study is an evaluation of student perceptions of a SPB and of interest to the study was the relationship between theory and practice, the availability of resources to complete the assignment and the contribution the portfolio made to the process of learning. Copyright 2001 Harcourt Publishers Ltd.

  6. Analysis of a 10% Renewable Portfolio Standard

    EIA Publications

    2003-01-01

    On May 8, 2003, Senator Jeff Bingaman, the Ranking Minority Member of the Senate Committee on Energy and Natural Resources, requested an analysis of a nationwide Renewable Portfolio Standard (RPS) program proposed to be amended to energy legislation currently pending before the U.S. Senate. With his request Sen. Bingaman provided specific information on the program to be analyzed. This analysis was prepared in response to his request and projects the impact of the proposed program on energy supply, demand, prices, and emissions. The analysis is based on the Annual Energy Outlook 2003 (AEO2003) projections of energy supply, demand, and prices through 2025, as updated in May 2003.

  7. Portfolio Standards and the Promotion of Combined Heat And Power

    EPA Pesticide Factsheets

    This paper presents the basic portfolio standard design approaches, identifies key CHP-related issues for policymakers to consider, and provides state-specific information on existing standards allowing for CHP.

  8. 40 CFR 1036.108 - Greenhouse gas emission standards.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 34 2012-07-01 2012-07-01 false Greenhouse gas emission standards... and Related Requirements § 1036.108 Greenhouse gas emission standards. This section contains standards... of six greenhouse gases: carbon dioxide, nitrous oxide, methane, hydrofluorocarbons,...

  9. 40 CFR 1036.108 - Greenhouse gas emission standards.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 33 2014-07-01 2014-07-01 false Greenhouse gas emission standards... and Related Requirements § 1036.108 Greenhouse gas emission standards. This section contains standards... of six greenhouse gases: carbon dioxide, nitrous oxide, methane, hydrofluorocarbons,...

  10. 40 CFR 1036.108 - Greenhouse gas emission standards.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 34 2013-07-01 2013-07-01 false Greenhouse gas emission standards... and Related Requirements § 1036.108 Greenhouse gas emission standards. This section contains standards... of six greenhouse gases: carbon dioxide, nitrous oxide, methane, hydrofluorocarbons,...

  11. Analysis of a 10% Renewable Portfolio Standard, Supplement to

    EIA Publications

    2003-01-01

    On June 10, 2003, Senator Pete Domenici, Chairman of the Senate Committee on Energy and Natural Resources, requested additional analysis of a Renewable Portfolio Standard (RPS), expected to be proposed as an amendment to energy legislation currently pending before the U.S. Senate. This request asked the Energy Information Administration (EIA) to provide additional results from two previously released EIA analyses of the proposed legislation, and to conduct further analyses with modified assumptions.

  12. Preservice Teacher Standards and the MAGNETIC CONNECTIONS Electronic Portfolio.

    ERIC Educational Resources Information Center

    Gathercoal, Paul; Bryde, Beverly R.; Mahler, James; Love, Douglas O.; McKean, Gerry

    This article describes Web-based portfolio systems, examining what is known about implementing Web-based student portfolios. The first two sections address the culture and ideologies needed for successful implementation, discussing faculty role in the portfolio process and broadening the definition from a portfolio of student artifacts to a…

  13. Save water to save carbon and money: developing abatement costs for expanded greenhouse gas reduction portfolios.

    PubMed

    Stokes, Jennifer R; Hendrickson, Thomas P; Horvath, Arpad

    2014-12-02

    The water-energy nexus is of growing interest for researchers and policy makers because the two critical resources are interdependent. Their provision and consumption contribute to climate change through the release of greenhouse gases (GHGs). This research considers the potential for conserving both energy and water resources by measuring the life-cycle economic efficiency of greenhouse gas reductions through the water loss control technologies of pressure management and leak management. These costs are compared to other GHG abatement technologies: lighting, building insulation, electricity generation, and passenger transportation. Each cost is calculated using a bottom-up approach where regional and temporal variations for three different California water utilities are applied to all alternatives. The costs and abatement potential for each technology are displayed on an environmental abatement cost curve. The results reveal that water loss control can reduce GHGs at lower cost than other technologies and well below California's expected carbon trading price floor. One utility with an energy-intensive water supply could abate 135,000 Mg of GHGs between 2014 and 2035 and save--rather than spend--more than $130/Mg using the water loss control strategies evaluated. Water loss control technologies therefore should be considered in GHG abatement portfolios for utilities and policy makers.

  14. Analysis of a 10% Renewable Portfolio Standard, Addendum

    EIA Publications

    2003-01-01

    On May 8, 2003, Senator Jeff Bingaman, the Ranking Minority Member of the Senate Committee on Energy and Natural Resources, requested an analysis of a nationwide Renewable Portfolio Standard (RPS) program proposed to be amended to energy legislation currently pending before the U.S. Senate. With his request Sen. Bingaman provided specific information on the program to be analyzed. This analysis was prepared in response to his request and projects the impact of the proposed program on energy supply, demand, prices, and emissions. The analysis is based on the Annual Energy Outlook 2003 (AEO2003) projections of energy supply, demand, and prices through 2025, as updated in May 2003.

  15. Future Costs, Benefits, and Impacts of Renewables Used to Meet U.S. Renewable Portfolio Standards

    SciTech Connect

    2016-12-01

    This brochure provides a brief overview of the report titled 'A Prospective Analysis of the Costs, Benefits, and Impacts of U.S. Renewable Portfolio Standards.' The report evaluates the future costs, benefits, and other impacts of renewable energy used to meet current state renewable portfolio standards (RPSs). It also examines a future scenario where RPSs are expanded. The analysis examines changes in electric system costs and retail electricity prices, which include all fixed and operating costs, including capital costs for all renewable, non-renewable, and supporting (e.g., transmission and storage) electric sector infrastructure; fossil fuel, uranium, and biomass fuel costs; and plant operations and maintenance expenditures. The analysis evaluates three specific benefits: air pollution, greenhouse gas emissions, and water use. It also analyzes two other impacts, renewable energy workforce and economic development, and natural gas price suppression. The analysis finds that the benefits or renewable energy used to meet RPS polices exceed the costs, even when considering the highest cost and lowest benefit outcomes.

  16. Examining the target levels of state renewable portfolio standards

    NASA Astrophysics Data System (ADS)

    Helwig, Laurence Douglas

    At present 37 U.S. states have passed Renewable Portfolio Standards (RPS) or have a legislative driven goal that supports investment in renewable energy (RE) technologies. Previous research has identified economic, governmental, ideological and infrastructural characteristics as key predictors of policy adoption and renewable energy deployment efforts (Carley, 2009; Davis & Davis, 2009; Bohn & Lant, 2009; Lyon & Yin, 2010). To date, only a few studies have investigated the target levels of renewable portfolio standards. Carley & Miller (2012) found that policies of differing stringencies were motivated by systematically different factors that included governmental ideology. The purpose of this dissertation is to replicate and expand upon earlier models that predicted RPS adoption and RE deployment efforts by adding regulatory, infrastructural and spatial characteristics to predict RPS target levels. Hypotheses were tested using three alternative measurements of RPS target level strength to determine to what extent a combination of explanatory variables explain variation in policy target levels. Multivariate linear regression and global spatial autocorrelation results indicated that multiple state internal determinants influenced RPS target level including average electricity price, state government ideology and to a lesser extent actual RE potential capacity. In addition, some diffusion effects were found to exist that indicated that states are setting their RPS target levels lower than their neighboring states and a local geo-spatial clustering effect was observed in the target levels for a grouping of northeastern states.

  17. Retrospective Analysis of the Benefits and Impacts of U.S. Renewable Portfolio Standards

    SciTech Connect

    Wiser, Ryan; Barbose, Galen; Heeter, Jenny; Mai, Trieu; Bird, Lori; Bolinger, Mark; Carpenter, Alberta; Heath, Garvin; Keyser, David; Macknick, Jordan; Mills, Andrew; Millstein, Dev

    2016-01-06

    This analysis is the first-ever comprehensive assessment of the benefits and impacts of state renewable portfolio standards (RPSs). This joint National Renewable Energy Laboratory-Lawrence Berkeley National Laboratory project provides a retrospective analysis of RPS program benefits and impacts, including greenhouse gas emissions reductions, air pollution emission reductions, water use reductions, gross jobs and economic development impacts, wholesale electricity price reduction impacts, and natural gas price reduction impacts. Wherever possible, benefits and impacts are quantified in monetary terms. The paper will inform state policymakers, RPS program administrators, industry, and others about the costs and benefits of state RPS programs. In particular, the work seeks to inform decision-making surrounding ongoing legislative proposals to scale back, freeze, or expand existing RPS programs, as well as future discussions about increasing RPS targets or otherwise increasing renewable energy associated with Clean Power Plan compliance or other emission-reduction goals.

  18. A Prospective Analysis of the Costs, Benefits, and Impacts of U.S. Renewable Portfolio Standards

    SciTech Connect

    Mai, Trieu; Wiser, Ryan; Barbose, Galen; Bird, Lori; Heeter, Jenny; Keyser, David; Krishnan, Venkat; Macknick, Jordan; Millstein, Dev

    2016-12-01

    This is the third in a series of reports exploring the costs, benefits, and other impacts of state renewable portfolio standards (RPS). This report evaluates the effects of renewable electricity used to meet aggregate RPS demand growth prospectively, over the period 2015-2050, under both current RPS policies as well as a potential expansion of those policies. Relying on a well-vetted suite of methods, the report quantifies: the costs to the electric system and retail electricity price impacts; the potential societal benefits associated with reduced greenhouse gas emissions, air pollution emissions, and water use; workforce requirements and economic development effects; and consumer savings associated with reduced natural gas prices. The study quantifies these effects in both physical and monetary terms, where possible, at both national and regional levels, and characterizes key uncertainties. The two prior studies in the series have focused, instead, on the historical costs and on the historical benefits and impacts of state RPS policies.

  19. Retrospective Analysis of the Benefits and Impacts of U.S. Renewable Portfolio Standards

    SciTech Connect

    Wiser, Ryan; Barbose, Galen; Heeter, Jenny; Mai, Trieu; Bird, Lori; Bolinger, Mark; Carpenter, Alberta; Heath, Garvin; Keyser, David; Macknick, Jordan; Mills, Andrew; Millstein, Dev

    2016-01-06

    This analysis is the first-ever comprehensive assessment of the benefits and impacts of state renewable portfolio standards (RPSs). This joint National Renewable Energy Laboratory-Lawrence Berkeley National Laboratory project provides a retrospective analysis of RPS program benefits and impacts, including greenhouse gas emissions reductions, air pollution emission reductions, water use reductions, gross jobs and economic development impacts, wholesale electricity price reduction impacts, and natural gas price reduction impacts. Wherever possible, benefits and impacts are quantified in monetary terms. The paper will inform state policymakers, RPS program administrators, industry, and others about the costs and benefits of state RPS programs. In particular, the work seeks to inform decision-making surrounding ongoing legislative proposals to scale back, freeze, or expand existing RPS programs, as well as future discussions about increasing RPS targets or otherwise increasing renewable energy associated with Clean Power Plan compliance or other emission-reduction goals.

  20. A Prospective Analysis of the Costs, Benefits, and Impacts of U.S. Renewable Portfolio Standards

    SciTech Connect

    Mai, Trieu; Wiser, Ryan; Barbose, Galen; Bird, Lori; Heeter, Jenny; Keyser, David; Krishnan, Venkat; Macknick, Jordan; Millstein, Dev

    2016-12-01

    This report evaluates the future costs, benefits, and other impacts of renewable energy used to meet current state renewable portfolio standards (RPSs). It also examines a future scenario where RPSs are expanded. The analysis examines changes in electric system costs and retail electricity prices, which include all fixed and operating costs, including capital costs for all renewable, non-renewable, and supporting (e.g., transmission and storage) electric sector infrastructure; fossil fuel, uranium, and biomass fuel costs; and plant operations and maintenance expenditures. The analysis evaluates three specific benefits: air pollution, greenhouse gas emissions, and water use. It also analyzes two other impacts, renewable energy workforce and economic development, and natural gas price suppression. This analysis finds that the benefits or renewable energy used to meet RPS polices exceed the costs, even when considering the highest cost and lowest benefit outcomes.

  1. The performance of renewable portfolio standards in the United States

    NASA Astrophysics Data System (ADS)

    Gong, Binlei

    The Renewable Portfolio Standard (RPS) is a renewable energy policy that ensures a minimum amount of renewable energy in the portfolio of electric-generating resources serving a state. This article first analyzes theoretically expected effects of RPS on renewable energy quantities, electricity price, and emissions. With a balanced panel of 48 states for 1990-2008, this paper estimates causal impact of RPS through an econometric model. During these regressions, a new measure for RPS indicator has also been introduced to deal with the heterogeneity problem. This paper also account for the partial effect and the different trends of outcomes in the absence of RPS across states. The estimators imply that RPS on average are effective in having a positive impact on renewable energy share but not that efficient since significantly increasing the electricity price. This research also finds that strengthening RPS can reduce carbon and other emissions but these benefits cannot fully compensate the consumer surplus loss caused by RPS, which finally implies a national-wide RPS is likely to be inefficient even with emission concern. Finally, the breakeven price is estimated, which implies the policies' cost of reducing the emissions. This paper also does same analysis on regional level and concludes that RPS is likely to be efficient in Midwest and in West but not that efficient in Northeast and in South with emission concern.

  2. The Standards-Based Digital School Leader Portfolio: A Handbook for Preparation and Practice

    ERIC Educational Resources Information Center

    Hauser, Gregory M.; Koutouzos, Dennis W.

    2005-01-01

    This book is a comprehensive step-by-step tool for school leader preparation candidates and school leaders alike in the development of standards-based digital school leader portfolios. Readers receive a rich array of activities, worksheets, and rubrics useful in the planning, development, and assessment of standards-based digital portfolios.…

  3. Evaluating a Proposed 20% National Renewable Portfolio Standard

    SciTech Connect

    Logan, J.; Sullivan, P.; Short, W.; Bird, L.; James, T. L.; Shah, M. R.

    2009-02-01

    This paper provides a preliminary analysis of the impacts of a proposed 20% national renewable portfolio standard (RPS) by 2021, which has been advanced in the U.S. Congress by Senator Jeff Bingaman of New Mexico. The paper was prepared before the America Recovery and Reinvestment Act was signed into law by President Barack Obama on February 17, 2009, and thus does not consider important changes in renewable energy (RE) policy that need to be addressed in follow-on analysis. We use NREL's Regional Energy Deployment System (ReEDS) model to evaluate the impacts of the RPS requirements on the energy sector and consider design issues associated with renewable energy certificate (REC) trading markets.

  4. Evaluating a Proposed 20% National Renewable Portfolio Standard

    SciTech Connect

    Logan, Jeffrey; Sullivan, Patrick; Short, Walter; Bird, Lori; James, Ted L.; Shah, Monisha R.

    2009-02-01

    This paper provides a preliminary analysis of the impacts of a proposed 20% national renewable portfolio standard (RPS) by 2021, which has been advanced in the U.S. Congress by Senator Jeff Bingaman of New Mexico. The paper was prepared before the America Recovery and Reinvestment Act was signed into law by President Barack Obama on February 17, 2009, and thus does not consider important changes in renewable energy (RE) policy that need to be addressed in follow-on analysis. We use NREL's Regional Energy Deployment System (ReEDS) model to evaluate the impacts of the RPS requirements on the energy sector and consider design issues associated with renewable energy certificate (REC) trading markets.

  5. Illinois Occupational Skill Standards: Greenhouse/Nursery Cluster.

    ERIC Educational Resources Information Center

    Illinois Occupational Skill Standards and Credentialing Council, Carbondale.

    This document of skill standards for the greenhouse/nursery cluster serves as a guide to workforce preparation program providers in defining content for their programs and to employers to establish the skills and standards necessary for job acquisition. These 23 occupational skill standards describe what people should know and be able to do in an…

  6. The Portfolio Standard: How Students Can Show Us What They Know and Are Able To Do.

    ERIC Educational Resources Information Center

    Sunstein, Bonnie S., Ed.; Lovell, Jonathan H., Ed.

    In this book, teachers, students, administrators, and assessors all show that a carefully rendered portfolio becomes an increasingly internalized standard against which learners can assess their own growth. Essays in the book share diverse portfolio projects from across the United States and reflect the spirit and enthusiasm the authors shared as…

  7. The Portfolio Standard: How Students Can Show Us What They Know and Are Able To Do.

    ERIC Educational Resources Information Center

    Sunstein, Bonnie S., Ed.; Lovell, Jonathan H., Ed.

    In this book, teachers, students, administrators, and assessors all show that a carefully rendered portfolio becomes an increasingly internalized standard against which learners can assess their own growth. Essays in the book share diverse portfolio projects from across the United States and reflect the spirit and enthusiasm the authors shared as…

  8. The effect of state renewable portfolio standards on consumer participation in green pricing programs

    NASA Astrophysics Data System (ADS)

    Maltese, James L.

    In the last several years, two mechanisms for increasing the supply of renewable electricity have become increasingly popular: renewable portfolio standards, a state policy of mandating increased production of green power; and green pricing programs, which allow customers to purchase green power through their utilities. These mechanisms have been effective in increasing the adoption of renewable energy; however, it is unclear whether they interact in a way that is mutually beneficial or counterproductive. It is important to understand the effect of renewable portfolio standards on the voluntary market for green energy, especially as Congress considers a nationwide portfolio standard. The effectiveness of a renewable portfolio standard may be undercut if it leads customers to purchase less green power. This study analyzes the relationship between the passage and implementation of a renewable portfolio standard and two measures of enrollment in utility green pricing programs. Using eight years of data for all fifty states, the study utilizes multiple regression analysis with fixed-effects estimation. The results indicate that the passage of a renewable portfolio standard has a positive and statistically significant effect on green pricing enrollment within the state. At the same time, the rate at which states increase the stringency of the renewable portfolio standard is found to have no effect on enrollment. Although further study is needed to determine if additional factors are responsible for the observed increase in green pricing enrollment, this study provides evidence that such programs do not harm, and may in fact encourage, voluntary purchases of green power.

  9. Are renewables portfolio standards cost-effective emission abatement policy?

    PubMed

    Dobesova, Katerina; Apt, Jay; Lave, Lester B

    2005-11-15

    Renewables portfolio standards (RPS) could be an important policy instrument for 3P and 4P control. We examine the costs of renewable power, accounting for the federal production tax credit, the market value of a renewable credit, and the value of producing electricity without emissions of SO2, NOx, mercury, and CO2. We focus on Texas, which has a large RPS and is the largest U.S. electricity producer and one of the largest emitters of pollutants and CO2. We estimate the private and social costs of wind generation in an RPS compared with the current cost of fossil generation, accounting for the pollution and CO2 emissions. We find that society paid about 5.7 cent/kWh more for wind power, counting the additional generation, transmission, intermittency, and other costs. The higher cost includes credits amounting to 1.1 cent/kWh in reduced SO2, NOx, and Hg emissions. These pollution reductions and lower CO2 emissions could be attained at about the same cost using pulverized coal (PC) or natural gas combined cycle (NGCC) plants with carbon capture and sequestration (CCS); the reductions could be obtained more cheaply with an integrated coal gasification combined cycle (IGCC) plant with CCS.

  10. The renewables portfolio standard in Texas: An early assessment

    SciTech Connect

    Wiser, Ryan H.; Langniss, Ole

    2001-11-01

    Texas has rapidly emerged as one of the leading wind power markets in the United States. This development can be largely traced to a well-designed and carefully implemented renewables portfolio standard (RPS). The RPS is a new policy mechanism that has received increasing attention as an attractive approach to support renewable power generation. Though replacing existing renewable energy policies with an as-of-yet largely untested approach in the RPS is risky, early experience from Texas suggests that an RPS can effectively spur renewables development and encourage competition among renewable energy producers. Initial RPS targets in Texas will be far exceeded by the end of 2001, with as much as 930 MW of wind slated for installation this year. RPS compliance costs appear negligible, with new wind projects reportedly contracted for under 3(US)/242/kWh, in part as a result of a 1.7(US)/242/kWh production tax credit, an outstanding wind resource, and an RPS that is sizable enough to drive project economies of scale. Obliged retail suppliers have been willing to enter into long-term contracts with renewable generators, reducing important risks for both the developer and the retail supplier. Finally, the country's first comprehensive renewable energy certificate program has been put into place to monitor and track RPS compliance.

  11. Assessing the costs and benefits of US renewable portfolio standards

    NASA Astrophysics Data System (ADS)

    Wiser, Ryan; Mai, Trieu; Millstein, Dev; Barbose, Galen; Bird, Lori; Heeter, Jenny; Keyser, David; Krishnan, Venkat; Macknick, Jordan

    2017-09-01

    Renewable portfolio standards (RPS) exist in 29 US states and the District of Columbia. This article summarizes the first national-level, integrated assessment of the future costs and benefits of existing RPS policies; the same metrics are evaluated under a second scenario in which widespread expansion of these policies is assumed to occur. Depending on assumptions about renewable energy technology advancement and natural gas prices, existing RPS policies increase electric system costs by as much as 31 billion, on a present-value basis over 2015‑2050. The expanded renewable deployment scenario yields incremental costs that range from 23 billion to 194 billion, depending on the assumptions employed. The monetized value of improved air quality and reduced climate damages exceed these costs. Using central assumptions, existing RPS policies yield 97 billion in air-pollution health benefits and 161 billion in climate damage reductions. Under the expanded RPS case, health benefits total 558 billion and climate benefits equal 599 billion. These scenarios also yield benefits in the form of reduced water use. RPS programs are not likely to represent the most cost effective path towards achieving air quality and climate benefits. Nonetheless, the findings suggest that US RPS programs are, on a national basis, cost effective when considering externalities.

  12. Essays in energy economics: An inquiry into Renewable Portfolio Standards

    NASA Astrophysics Data System (ADS)

    Lamontagne, Laura Marie

    In an attempt to motivate the transition away from fossil fuels, reduce carbon emissions and diversify electricity supply, twenty-nine states and the District of Columbia have adopted a Renewable Portfolio Standard (RPS). An RPS is a form of regulation that requires increased electricity production from renewable energy sources. These standards vary by state but generally require a minimum percentage of electricity generation to come from renewable technologies by a predetermined date. In the first chapter I examine the effect of the adoption of an RPS on electricity rates, making use of the increased availability of data since several policies' adoption. Using a fifty state panel over the years 1990-2010, this study uses a difference-in-difference and a fixed effects estimation to measure how the adoption of an RPS affects the price of electricity in state markets. Empirical findings show that states that have adopted an RPS have approximately a 20% higher all-retail electricity price than states that do not have RPS. Following the adoption of this regulation, a state can expect to see electricity prices rise by roughly 5% on average per year relative to states with no RPS. Once the legislation has been in place for almost a decade, electricity rates begin to dramatically increase upwards of 10% per year. In the second chapter, I observe the economic, social and political factors that prompt a state to adopt a Renewable Portfolio Standard. I estimate a probit model to determine the probability a state will adopt an RPS in a year given its present political and economic climate. Results show that a deregulated electricity market, a high per-capita GDP, a strong democratic presence in the state legislature, high renewable capacity, and a strong incidence of natural gas are indicators a state will pass an RPS. Whether or not a state is a net importer or exporter of electricity is not a significant indicator of adoption of an RPS within a state. The third chapter

  13. Emissions reductions from expanding state-level renewable portfolio standards.

    PubMed

    Johnson, Jeremiah X; Novacheck, Joshua

    2015-05-05

    In the United States, state-level Renewable Portfolio Standards (RPS) have served as key drivers for the development of new renewable energy. This research presents a method to evaluate emissions reductions and costs attributable to new or expanded RPS programs by integrating a comprehensive economic dispatch model and a renewable project selection model. The latter model minimizes incremental RPS costs, accounting for renewable power purchase agreements (PPAs), displaced generation and capacity costs, and net changes to a state's imports and exports. We test this method on potential expansions to Michigan's RPS, evaluating target renewable penetrations of 10% (business as usual or BAU), 20%, 25%, and 40%, with varying times to completion. Relative to the BAU case, these expanded RPS policies reduce the CO2 intensity of generation by 13%, 18%, and 33% by 2035, respectively. SO2 emissions intensity decreased by 13%, 20%, and 34% for each of the three scenarios, while NOx reductions totaled 12%, 17%, and 31%, relative to the BAU case. For CO2 and NOx, absolute reductions in emissions intensity were not as large due to an increasing trend in emissions intensity in the BAU case driven by load growth. Over the study period (2015 to 2035), the absolute CO2 emissions intensity increased by 1% in the 20% RPS case and decreased by 6% and 22% for the 25% and 40% cases, respectively. Between 26% and 31% of the CO2, SO2, and NOx emissions reductions attributable to the expanded RPS occur in neighboring states, underscoring the challenges quantifying local emissions reductions from state-level energy policies with an interconnected grid. Without federal subsidies, the cost of CO2 mitigation using an RPS in Michigan is between $28 and $34/t CO2 when RPS targets are met. The optimal renewable build plan is sensitive to the capacity credit for solar but insensitive to the value for wind power.

  14. A Cross-State Analysis of Renewable Portfolio Standard Development

    NASA Astrophysics Data System (ADS)

    Marchand, Mariel

    As of December 2016, thirty-seven states have a renewable portfolio standard (RPS). RPS require that utilities provide a certain percentage of electricity generated using renewable sources by a certain date. This thesis builds on diffusion of innovation literature to understand how factors within a state, such as its political climate and the strength of interest groups, appear to influence the adoption process and structure of the RPS in five states--Connecticut, New Jersey, Michigan, Colorado, and Washington. Each of these states has a strong RPS as measured by its renewable energy goal over its current renewable energy production, the time frame in which this goal must be met, and the percentage of the electric load that is included in the regulation. This thesis uses both within-case and cross-case analysis to understand which combinations of internal state factors potentially lead to the adoption of a strong RPS. It finds that there are a number of combinations of factors that appear to contribute to strong RPS, depending on the internal circumstances of each state. However, more important is that without the opportunity to tailor the policy to meet the needs of the state, it is likely that states with unfavorable internal factors may not choose to adopt a RPS at all, let alone a strong RPS. While the innovation factors identified through the RPS diffusion research often contribute to states adopting a strong RPS, this thesis finds that the influence of these factors depends on a combination of the internal state factors with the RPS adoption process in shaping the structure of the RPS.

  15. A retrospective analysis of benefits and impacts of U.S. renewable portfolio standards

    SciTech Connect

    Barbose, Galen; Wiser, Ryan; Heeter, Jenny; Mai, Trieu; Bird, Lori; Bolinger, Mark; Carpenter, Alberta; Heath, Garvin; Keyser, David; Macknick, Jordan; Mills, Andrew; Millstein, Dev

    2016-09-01

    As states consider revising or developing renewable portfolio standards (RPS), they are evaluating policy costs, benefits, and other impacts. We present the first U. S. national-level assessment of state RPS program benefits and impacts, focusing on new renewable electricity resources used to meet RPS compliance obligations in 2013. In our central-case scenario, reductions in life-cycle greenhouse gas emissions from displaced fossil fuel-generated electricity resulted in $2.2 billion of global benefits. Health and environmental benefits from reductions in criteria air pollutants (sulfur dioxide, nitrogen oxides, and particulate matter 2.5) were even greater, estimated at $5.2 billion in the central case. Further benefits accrued in the form of reductions in water withdrawals and consumption for power generation. Finally, although best considered resource transfers rather than net societal benefits, new renewable electricity generation used for RPS compliance in 2013 also supported nearly 200,000 U. S.-based gross jobs and reduced wholesale electricity prices and natural gas prices, saving consumers a combined $1.3-$4.9 billion. In total, the estimated benefits and impacts well-exceed previous estimates of RPS compliance costs.

  16. Portfolios for Prior Learning Assessment: Caught between Diversity and Standardization

    ERIC Educational Resources Information Center

    Sweygers, Annelies; Soetewey, Kim; Meeus, Wil; Struyf, Elke; Pieters, Bert

    2009-01-01

    In recent years, procedures have been established in Flanders for "Prior Learning Assessment" (PLA) outside the formal learning circuit, of which the portfolio is a regular component. In order to maximize the possibilities of acknowledgement of prior learning assessment, the Flemish government is looking for a set of common criteria and…

  17. Reduced Emissions and Lower Costs: Combining Renewable Energy and Energy Efficiency into a Sustainable Energy Portfolio Standard

    SciTech Connect

    Brown, Marilyn A

    2007-01-01

    Combining renewable energy and energy efficiency in Sustainable Energy Portfolio Standards has emerged as a key state and national policy option to achieve greater levels of sustainable energy resources with maximum economic efficiency and equity. One advantage of the SEPS relative to a renewable portfolio standard or a stand-along energy efficiency resource standard is enhanced flexibility and broader options for meeting targets.

  18. 77 FR 26476 - Standards of Performance for Greenhouse Gas Emissions for New Stationary Sources: Electric...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-04

    ... AGENCY 40 CFR Part 60 Standards of Performance for Greenhouse Gas Emissions for New Stationary Sources... proposed rule, ``Standards of Performance for Greenhouse Gas Emissions for New Stationary Sources: Electric... for the proposed Standards of Performance for Greenhouse Gas Emissions for New Stationary...

  19. 75 FR 67059 - Public Hearings for Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-01

    ... Pickup Trucks and Vans; and (3) Vocational Vehicles, as well as gasoline and diesel heavy-duty engines... Hearings for Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles AGENCIES: Environmental Protection Agency (EPA) and National Highway Traffic...

  20. EPA Will Propose Historic Greenhouse Gas Emissions Standards for Light-Duty Vehicles Factsheet

    EPA Pesticide Factsheets

    This fact sheet announces that EPA will propose new federal emissions standards for greenhouse gases for light-duty vehicles that will result in significant reductions in both greenhouse gases and oil consumption.

  1. Big is beautiful: the case for Federal leadership on a national renewable portfolio standard

    SciTech Connect

    Sovacool, Benjamin K.; Cooper, Christopher

    2007-05-15

    State-based renewable portfolio standards (RPS) create regulatory uncertainty for investors and inherent inequities among ratepayers. Ultimately, federal legislation can help create a more just, diverse and predictable national market for renewable resources without significantly increasing aggregate electricity prices. (author)

  2. 40 CFR 1036.241 - Demonstrating compliance with greenhouse gas pollutant standards.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... greenhouse gas pollutant standards. 1036.241 Section 1036.241 Protection of Environment ENVIRONMENTAL... HIGHWAY ENGINES Certifying Engine Families § 1036.241 Demonstrating compliance with greenhouse gas... deterioration factors as follows: (1) Additive deterioration factor for greenhouse gas emissions. Except...

  3. 40 CFR 1036.241 - Demonstrating compliance with greenhouse gas pollutant standards.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... greenhouse gas pollutant standards. 1036.241 Section 1036.241 Protection of Environment ENVIRONMENTAL... HIGHWAY ENGINES Certifying Engine Families § 1036.241 Demonstrating compliance with greenhouse gas... deterioration factors as follows: (1) Additive deterioration factor for greenhouse gas emissions. Except...

  4. 40 CFR 1036.241 - Demonstrating compliance with greenhouse gas pollutant standards.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... greenhouse gas pollutant standards. 1036.241 Section 1036.241 Protection of Environment ENVIRONMENTAL... HIGHWAY ENGINES Certifying Engine Families § 1036.241 Demonstrating compliance with greenhouse gas... deterioration factors as follows: (1) Additive deterioration factor for greenhouse gas emissions. Except...

  5. Including Alternative Resources in State Renewable Portfolio Standards: Current Design and Implementation Experience

    SciTech Connect

    Heeter, J.; Bird, L.

    2012-11-01

    Currently, 29 states, the District of Columbia, and Puerto Rico have instituted a renewable portfolio standard (RPS). An RPS sets a minimum threshold for how much renewable energy must be generated in a given year. Each state policy is unique, varying in percentage targets, timetables, and eligible resources. This paper examines state experience with implementing renewable portfolio standards that include energy efficiency, thermal resources, and non-renewable energy and explores compliance experience, costs, and how states evaluate, measure, and verify energy efficiency and convert thermal energy. It aims to gain insights from the experience of states for possible federal clean energy policy as well as to share experience and lessons for state RPS implementation.

  6. Renewable Portfolio Standards in the States: Balancing Goals and Implementation Strategies

    SciTech Connect

    Cory, K. S.; Swezey, B. G.

    2007-12-01

    This paper reports on renewable portfolio standards (RPS) and how the RPS rules vary from state to state. This variation presents important challenges to successful implementation. Key issues are discussed in terms of resource availability, solar-specific provisions, and political and regulatory consistency, and their impacts on the ability to finance new renewable energy projects. This report emphasizes the fact that a successful RPS policy must balance a state's goals for fuel diversity, economic development, price effects, and environmental benefits.

  7. 75 FR 81952 - Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-29

    ... Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and...-Duty National Program that will increase fuel efficiency and reduce greenhouse gas emissions for on... a comprehensive Heavy-Duty National Program that will increase fuel efficiency and reduce...

  8. Interface map as a user-driven and activity-driven interoperability standards portfolio.

    PubMed

    Virkanen, Hannu; Mykkänen, Juha; Tuomainen, Mika

    2013-01-01

    Use of interoperability specifications such as standards and their implementation guides is currently hindered by lack of systematic directories. It is difficult for potential users of standards to locate potential specifications which could be useful for their specific development needs. We introduce a multi-directory interface map approach which supports systematic description of healthcare interoperability specifications through consistent metadata and complementary classifications. The approach is built on basic premises of standards portfolios in enterprise architectures as well as activity-driven and interoperability paradigm-based classifications. We illustrate the approach through a case project in Finland.

  9. 40 CFR 1037.241 - Demonstrating compliance with exhaust emission standards for greenhouse gas pollutants.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 34 2013-07-01 2013-07-01 false Demonstrating compliance with exhaust emission standards for greenhouse gas pollutants. 1037.241 Section 1037.241 Protection of Environment... standards for greenhouse gas pollutants. (a) For purposes of certification, your vehicle family...

  10. 40 CFR 1037.241 - Demonstrating compliance with exhaust emission standards for greenhouse gas pollutants.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 33 2014-07-01 2014-07-01 false Demonstrating compliance with exhaust emission standards for greenhouse gas pollutants. 1037.241 Section 1037.241 Protection of Environment... standards for greenhouse gas pollutants. (a) For purposes of certification, your vehicle family...

  11. 40 CFR 1037.241 - Demonstrating compliance with exhaust emission standards for greenhouse gas pollutants.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 34 2012-07-01 2012-07-01 false Demonstrating compliance with exhaust emission standards for greenhouse gas pollutants. 1037.241 Section 1037.241 Protection of Environment... standards for greenhouse gas pollutants. (a) For purposes of certification, your vehicle family...

  12. CAAAC Greenhouse Gas Standards for Power Plants Webinar Meeting Minutes and Presentation

    EPA Pesticide Factsheets

    Greenhouse Gas Standards for Power Plants webinar, regarding modified and restructured standards for Section 111. This section of the Act establishes a mechanism for controlling air pollution from stationary sources.

  13. Estimating the Value of Utility-Scale Solar Technologies in California Under a 40% Renewable Portfolio Standard

    SciTech Connect

    Jorgenson, J.; Denholm, P.; Mehos, M.

    2014-05-01

    Concentrating solar power with thermal energy storage (CSP-TES) is a unique source of solar energy in that its output can be shifted over time. The ability of CSP-TES to be a flexible source of generation may be particularly valuable in regions with high overall penetration of solar energy, such as the state of California. California's Renewable Portfolio Standard (RPS) requires the state to increase generation from eligible renewable energy resources to reach 33% of retail electricity sales by 2020. Beyond 2020, California targets a further reduction in greenhouse gas emissions. To help reach this goal, current California governor Jerry Brown has stated that a higher 40% RPS might be reachable in the near term. The levelized cost of energy is generally emphasized when assessing the economic viability of renewable energy systems implemented to achieve the RPS. However, the operational and capacity benefits of such systems are often ignored, which can lead to incorrect economic comparisons between CSP-TES and variable renewable generation technologies such as solar photovoltaics (PV). Here we evaluate a 40% RPS scenario in a California grid model with PV or CSP-TES providing the last 1% of RPS energy. We compare the technical and economic implications of integrating either solar technology under several sensitivities, finding that the ability to displace new conventional thermal generation capacity may be the largest source of value of CSP-TES compared to PV at high solar penetrations.

  14. Estimating the Value of Utility-Scale Solar Technologies in California Under a 40% Renewable Portfolio Standard (Report Summary) (Presentation)

    SciTech Connect

    Jorgenson, J.; Denholm, P.; Mehos, M.

    2014-06-01

    Concentrating solar power with thermal energy storage (CSP-TES) is a unique source of solar energy in that its output can be shifted over time. The ability of CSP-TES to be a flexible source of generation may be particularly valuable in regions with high overall penetration of solar energy, such as the state of California. California's Renewable Portfolio Standard (RPS) requires the state to increase generation from eligible renewable energy resources to reach 33% of retail electricity sales by 2020. Beyond 2020, California targets a further reduction in greenhouse gas emissions. To help reach this goal, current California governor Jerry Brown has stated that a higher 40% RPS might be reachable in the near term. The levelized cost of energy is generally emphasized when assessing the economic viability of renewable energy systems implemented to achieve the RPS. However, the operational and capacity benefits of such systems are often ignored, which can lead to incorrect economic comparisons between CSP-TES and variable renewable generation technologies such as solar photovoltaics (PV). Here we evaluate a 40% RPS scenario in a California grid model with PV or CSP-TES providing the last 1% of RPS energy. We compare the technical and economic implications of integrating either solar technology under several sensitivities, finding that the ability to displace new conventional thermal generation capacity may be the largest source of value of CSP-TES compared to PV at high solar penetrations.

  15. Power Transfer Potential to the Southeast in Response to a Renewable Portfolio Standard: Interim Report 2

    SciTech Connect

    Hadley, Stanton W; Key, Thomas S; Deb, Rajat

    2009-05-01

    Electricity consumption in the Southeastern US, not including Florida, is approximately 24% of the total US. The availability of renewable resources for electricity production is relatively small compared to the high consumption. Therefore meeting a national renewable portfolio standard (RPS) is particularly challenging in this region. Neighboring regions, particularly to the west, have significant wind resources and given sufficient long distant transmission these resources could serve energy markets in the SE. This report looks at renewable resource supply relative to demands and the potential for power transfer into the SE. It shows that development of wind resources will depend not only on available transmission capacity but also on electricity supply and demand factors.

  16. Multi-Year Analysis Examines Costs, Benefits, and Impacts of Renewable Portfolio Standards

    SciTech Connect

    2016-01-01

    As states consider revising renewable portfolio standard (RPS) programs or developing new ones, careful assessments of the costs, benefits, and other impacts of existing policies will be critical. RPS programs currently exist in 29 states and Washington, D.C. Many of these policies, which were enacted largely during the late 1990s and 2000s, will reach their terminal targets by the end of this decade. The National Renewable Energy Laboratory (NREL) and Lawrence Berkeley National Laboratory (LBNL) are engaged in a multi-year project to examine the costs, benefits, and other impacts of state RPS polices both retrospectively and prospectively. This fact sheet overviews this work.

  17. Executive Summary: EPA's Waiver Decision on California's Greenhouse Gas Emission Standards for New Motor Vehicles

    EPA Pesticide Factsheets

    This letter from EPA Administrator Stephen Johnson to Governor Schwarzenegger denies California's request for a waiver of Federal preemption for motor vehicle greenhouse gas emission standards submitted by the California Air Resources Board (CARB).

  18. Beyond Renewable Portfolio Standards: An Assessment of Regional Supply and Demand Conditions Affecting the Future of Renewable Energy in the West; Report and Executive Summary

    SciTech Connect

    Hurlbut, D. J.; McLaren, J.; Gelman, R.

    2013-08-01

    This study assesses the outlook for utility-scale renewable energy development in the West once states have met their renewable portfolio standard (RPS) requirements. In the West, the last state RPS culminates in 2025, so the analysis uses 2025 as a transition point on the timeline of RE development. Most western states appear to be on track to meet their final requirements, relying primarily on renewable resources located relatively close to the customers being served. What happens next depends on several factors including trends in the supply and price of natural gas, greenhouse gas and other environmental regulations, consumer preferences, technological breakthroughs, and future public policies and regulations. Changes in any one of these factors could make future renewable energy options more or less attractive.

  19. Mirror, Mirror on the Wall, Which Is the Fairest Test of All? An Examination of the Equitability of Portfolio Assessment Relative to Standardized Tests.

    ERIC Educational Resources Information Center

    Supovitz, Jonathan A.; Brennan, Robert T.

    1997-01-01

    Comparison of standardized test scores and language arts portfolios of 5,264 first and second graders showed that alternative assessments can decrease inequities between blacks and whites. However, girls performed far better than boys on portfolios than on standardized tests. (SK)

  20. Did state renewable portfolio standards induce technical change in methane mitigation in the U.S. landfill sector?

    NASA Astrophysics Data System (ADS)

    Delhotal, Katherine Casey

    Landfill gas (LFG) projects use the gas created from decomposing waste, which is approximately 49% methane, and substitute it for natural gas in engines, boilers, turbines, and other technologies to produce energy or heat. The projects are beneficial in terms of increased safety at the landfill, production of a cost-effective source of energy or heat, reduced odor, reduced air pollution emissions, and reduced greenhouse gas emissions. However, landfills sometimes face conflicting policy incentives. The theory of technical change shows that the diffusion of a technology or groups of technologies increases slowly in the beginning and then picks up speed as knowledge and better understanding of using the technology diffuses among potential users. Using duration analysis, data on energy prices, State and Federal policies related to landfill gas, renewable energy, and air pollution, as well as control data on landfill characteristics, I estimate the influence and direction of influence of renewable portfolio standards (RPS). The analysis found that RPS positively influences the diffusion of landfill gas technologies, encouraging landfills to consider electricity generation projects over direct sales of LFG to another facility. Energy price increases or increased revenues for a project are also critical. Barriers to diffusion include air emission permits in non-attainment areas and policies, such as net metering, which promote other renewables over LFG projects. Using the estimates from the diffusion equations, I analyze the potential influence of a Federal RPS as well as the potential interaction with a Federal, market based climate change policy, which will increase the revenue of a project through higher energy sale prices. My analysis shows that a market based climate change policy such as a cap-and-trade or carbon tax scheme would increase the number of landfill gas projects significantly more than a Federal RPS.

  1. 75 FR 25323 - Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-07

    ... Trading Provisions for CO 2 Standards 5. CO 2 Temporary Lead-Time Allowance Alternative Standards 6... Fleet Average Program 1. Air Conditioning Related Credits 2. Flexible Fuel and Alternative Fuel Vehicle... Sciences, National Academy of Engineering, Institute of Medicine, ``Policy Implications of Greenhouse...

  2. Power Transfer Potential to the Southeast in Response to a Renewable Portfolio Standard: Final Report

    SciTech Connect

    Key, Thomas S; Hadley, Stanton W; Deb, Rajat

    2010-02-01

    Electricity consumption in the Southeastern US, including Florida, is approximately 32% of the total US. The availability of renewable resources for electricity production is relatively small compared to the high consumption. Therefore meeting a national renewable portfolio standard (RPS) is particularly challenging in this region. Neighboring regions, particularly to the west, have significant wind resources and given sufficient transmission these resources could serve energy markets in the SE. This report looks at renewable resource supply relative to demands and the potential for power transfer into the SE. We found that significant wind energy transfers, at the level of 30-60 GW, are expected to be economic in case of federal RPC or CO2 policy. Development of wind resources will depend not only on the available transmission capacity and required balancing resources, but also on electricity supply and demand factors.

  3. A Retrospective Analysis of the Benefits and Impacts of U.S. Renewable Portfolio Standards

    SciTech Connect

    Wiser, Ryan; Barbose, Galen; Heeter, Jenny; Mai, Trieu; Bird, Lori; Bolinger, Mark; Carpenter, Alberta; Heath, Garvin; Keyser, David; Macknick, Jordan; Mills, Andrew; Millstein, Dev

    2016-01-01

    This is the second in a series of reports exploring the costs, benefits, and other impacts of state renewable portfolio standards (RPS), both retrospectively and prospectively. This report focuses on the benefits and impacts of all state RPS programs, in aggregate, for the year 2013 (the most-recent year for which the requisite data were available). Relying on a well-vetted set of methods, the study evaluates a number of important benefits and impacts in both physical and monetary terms, where possible, and characterizes key uncertainties. The prior study in this series focused on historical RPS compliance costs, and future work will evaluate costs, benefits, and other impacts of RPS policies prospectively.

  4. Overall review of feed-in tariff and renewable portfolio standard policy: A perspective of China

    NASA Astrophysics Data System (ADS)

    Yan, Q. Y.; Zhang, Q.; Yang, L.; Wang, X.

    2016-08-01

    A major share of China's total carbon dioxide (CO2) emissions is from the electric power sector. To solve this problem, Chinese government has implemented many renewable energy policies in the electric power sector. In China, the most popular renewable energy policies are Feed-in tariff (FIT) and renewable portfolio standard (RPS). This paper first introduces the current development of renewable electricity generation. Second the design plan and implement of FIT and RPS in China's thermal electricity generation sector are summarized in this paper. Third this paper establishes a complementary mode of FIT and RPS which can provide a stable environment to make the FIT and RPS work together. Finally, based on the above analysis, this paper proposes relative suggestions for the implementation of FIT and RPS in China making recommendation for the development of electricity generation from renewable energy.

  5. Evaluating Renewable Portfolio Standards and Carbon Cap Scenarios in the U.S. Electric Sector

    SciTech Connect

    Bird, Lori; Chapman, Caroline; Logan, Jeff; Sumner, Jenny; Short, Walter

    2010-05-01

    This report examines the impact of various renewable portfolio standards (RPS) and cap-and-trade policy options on the U.S. electricity sector, focusing mainly on renewable energy generation. The analysis uses the National Renewable Energy Laboratory's Regional Energy Deployment System (ReEDS) model that simulates the least-cost expansion of electricity generation capacity and transmission in the United States to examine the impact of an emissions cap--similar to that proposed in the Waxman-Markey bill (H.R. 2454)--as well as lower and higher cap scenarios. It also examines the effects of combining various RPS targets with the emissions caps. The generation mix, carbon emissions, and electricity price are examined for various policy combinations to simulate the effect of implementing policies simultaneously.

  6. The Portfolio Guidebook: Implementing Quality in an Age of Standards. Bill Harp Professional Teachers Library.

    ERIC Educational Resources Information Center

    Koch, Richard; Schwartz-Petterson, Jean

    This portfolio book provides an actual step-by-step complete system of writing assessment from the ground up and across all grade levels. The book suggests that teachers purposefully gather student portfolios, reflect meaningfully on them, and then validly and reliably rate them with statistical success that will also feed meaningfully back into…

  7. The Portfolio Guidebook: Implementing Quality in an Age of Standards. Bill Harp Professional Teachers Library.

    ERIC Educational Resources Information Center

    Koch, Richard; Schwartz-Petterson, Jean

    This portfolio book provides an actual step-by-step complete system of writing assessment from the ground up and across all grade levels. The book suggests that teachers purposefully gather student portfolios, reflect meaningfully on them, and then validly and reliably rate them with statistical success that will also feed meaningfully back into…

  8. Survey of State-Level Cost and Benefit Estimates of Renewable Portfolio Standards

    SciTech Connect

    Heeter, J.; Barbose, G.; Bird, L.; Weaver, S.; Flores-Espino, F.; Kuskova-Burns, K.; Wiser, R.

    2014-05-01

    Most renewable portfolio standards (RPS) have five or more years of implementation experience, enabling an assessment of their costs and benefits. Understanding RPS costs and benefits is essential for policymakers evaluating existing RPS policies, assessing the need for modifications, and considering new policies. This study provides an overview of methods used to estimate RPS compliance costs and benefits, based on available data and estimates issued by utilities and regulators. Over the 2010-2012 period, average incremental RPS compliance costs in the United States were equivalent to 0.8% of retail electricity rates, although substantial variation exists around this average, both from year-to-year and across states. The methods used by utilities and regulators to estimate incremental compliance costs vary considerably from state to state and a number of states are currently engaged in processes to refine and standardize their approaches to RPS cost calculation. The report finds that state assessments of RPS benefits have most commonly attempted to quantitatively assess avoided emissions and human health benefits, economic development impacts, and wholesale electricity price savings. Compared to the summary of RPS costs, the summary of RPS benefits is more limited, as relatively few states have undertaken detailed benefits estimates, and then only for a few types of potential policy impacts. In some cases, the same impacts may be captured in the assessment of incremental costs. For these reasons, and because methodologies and level of rigor vary widely, direct comparisons between the estimates of benefits and costs are challenging.

  9. Practical Professional Portfolios.

    ERIC Educational Resources Information Center

    Giuliano, Frank J.

    1997-01-01

    Presents suggestions to help preservice teachers develop effective and practical portfolios. Discusses purposeful portfolios, portfolio development, entrance portfolios, progress portfolios, exit portfolios, and interview portfolios. (JRH)

  10. A status report on the design and implementation of state renewable portfolio standards and system benefits charge policies

    SciTech Connect

    Porter, K.; Wiser, R.

    2000-05-01

    At last year's Windpower conference, we reported on state policies to foster renewable energy as part of efforts to restructure state electric power markets. The primary policies states are pursuing for renewables are system benefits charges (SBC) and renewable portfolio standards (RPS). Renewable portfolio standard policies began taking effect this year, while other states are continuing to work on the design of their RPS implementation strategies. In addition, states have begun distributing proceeds from their SBC funds. As a result, some renewable energy projects are beginning to materialize. This paper provides an update on state efforts with these two policies and examines some of the implementation issues and difficulties that states have faced thus far.

  11. Renewables Portfolio Standards: A Factual Introduction toExperience from the United States

    SciTech Connect

    Wiser, R.; Namovicz, C.; Gielecki, M.; Smith, R.

    2007-05-09

    Renewables portfolio standards (RPS) have--since the late 1990s--proliferated at the state level in the United States. What began as a policy idea minted in California and first described in detail in the pages of the 'Electricity Journal' FPT has emerged as an important driver for renewable energy capacity additions in the United States. Over the years, articles in the 'Electricity Journal' have explored the RPS in more detail, identifying both its strengths and weaknesses. The present article provides an introduction to the history, concept, and design of the RPS, reviews early experience with the policy as applied at the state level, and provides a brief overview of Federal RPS proposals to date and the possible relationship between Federal and state RPS policies. Our purpose is to offer a factual introduction to the RPS, as applied and considered in the U.S. Though elements of state RPS design are summarized here, other publications provide a more thorough review of design lessons that emerge from that experience. In addition, the present article does not describe the results of economic analyses of Federal RPS proposals, though we do cite many of the analyses conducted by the U.S. DOE's Energy Information Administration (EIA).

  12. The Costs and Benefits of Compliance with Renewable Portfolio Standards: Reviewing Experience to Date

    SciTech Connect

    Heeter, Jenny; Barbose, Galen; Bird, Lori; Weaver, Samantha; Flores, Francisco; Kuskova-Burns, Ksenia; Wiser, Ryan

    2014-03-12

    More than half of U.S. states have renewable portfolio standards (RPS) in place and have collectively deployed approximately 46,000 MW of new renewable energy capacity through year-end 2012. Most of these policies have five or more years of implementation experience, enabling an assessment of their costs and benefits. Understanding RPS benefits and costs is essential for policymakers evaluating existing RPS policies, assessing the need for modifications, and considering new policies. A key aspect of this study is the comprehensive review of existing RPS cost and benefit estimates, in addition to an examination of the variety of methods used to calculate such estimates. Based on available data and estimates reported by utilities and regulators, this study summarizes RPS costs to date. The study considers how those costs may evolve going forward, given scheduled increases in RPS targets and cost containment mechanisms incorporated into existing policies. The report also summarizes RPS benefits estimates, based on published studies for individual states, and discusses key methodological considerations.

  13. Is it Worth it? A Comparative Analysis of Cost-Benefit Projectionsfor State Renewables Portfolio Standards

    SciTech Connect

    Chen, Cliff; Wiser, Ryan; Bolinger, Mark

    2006-06-05

    State renewables portfolio standards (RPS) have emerged as one of the most important policy drivers of renewable energy capacity expansion in the U.S. Collectively, these policies now apply to almost 40% of U.S. electricity load, and may have substantial impacts on electricity markets, ratepayers, and local economies. As RPS policies have been proposed or adopted in an increasing number of states, a growing number of studies have attempted to quantify the potential impacts of these policies, focusing primarily on projecting cost impacts, but sometimes also estimating macroeconomic and environmental effects. This report synthesizes and analyzes the results and methodologies of twenty-six distinct state or utility-level RPS cost impact analyses completed since 1998 (see Figure 1 and Appendix for a complete list of the studies). Together, these studies model proposed or adopted RPS policies in seventeen different states. We highlight the key findings of these studies on the costs and benefits of RPS policies, examine the sensitivity of projected costs to model assumptions, assess the attributes of different modeling approaches, and suggest possible areas of improvement for future RPS analysis.

  14. Power Transfer Potential to the Southeast in Response to a Renewable Portfolio Standard: Interim Report 1

    SciTech Connect

    Hadley, Stanton W; Key, Thomas S

    2009-03-01

    The power transfer potential for bringing renewable energy into the Southeast in response to a renewable portfolio standard (RPS) will depend not only on available transmission capacity but also on electricity supply and demand factors. This interim report examines how the commonly used EIA NEMS and EPRI NESSIE energy equilibrium models are considering such power transfers. Using regional estimates of capacity expansion and demand, a base case for 2008, 2020 and 2030 are compared relative to generation mix, renewable deployments, planned power transfers, and meeting RPS goals. The needed amounts of regional renewable energy to comply with possible RPS levels are compared to inter-regional transmission capacities to establish a baseline available for import into the Southeast and other regions. Gaps in the renewable generation available to meet RPS requirements are calculated. The initial finding is that the physical capability for transferring renewable energy into the SE is only about 10% of what would be required to meet a 20% RPS. Issues that need to be addressed in future tasks with respect to modeling are the current limitations for expanding renewable capacity and generation in one region to meet the demand in another and the details on transmission corridors required to deliver the power.

  15. Supporting Solar Power in Renewables Portfolio Standards: Experience from the United States

    SciTech Connect

    Wiser, Ryan; Barbose, Galen; Holt, Edward

    2010-10-01

    Among the available options for encouraging the increased deployment of renewable electricity, renewables portfolio standards (RPS) have become increasingly popular. The RPS is a relatively new policy mechanism, however, and experience with its use is only beginning to emerge. One key concern that has been voiced is whether RPS policies will offer adequate support to a wide range of renewable energy technologies and applications or whether, alternatively, RPS programs will favor a small number of the currently least-cost forms of renewable energy. This report documents the design of and early experience with state-level RPS programs in the United States that have been specifically tailored to encourage a wider diversity of renewable energy technologies, and solar energy in particular. As shown here, state-level RPS programs specifically designed to support solar have already proven to be an important, albeit somewhat modest, driver for solar energy deployment, and those impacts are projected to continue to build in the coming years. State experience in supporting solar energy with RPS programs is mixed, however, and full compliance with existing requirements has not been achieved. The comparative experiences described herein highlight the opportunities and challenges of applying an RPS to specifically support solar energy, as well as the importance of policy design details to ensuring that program goals are achieved.

  16. Renewable Portfolio Standards in the United States - A Status Report with Data Through 2007

    SciTech Connect

    Wiser, Ryan; Wiser, Ryan; Barbose, Galen; Bird, Lori; Churchill, Susannah; Deyette, Jeff; Holt, Ed

    2008-04-09

    Renewables portfolio standards (RPS) have proliferated at the state level in the United States since the late 1990s. In combination with Federal tax incentives, state RPS requirements have emerged as one of the most important drivers of renewable energy capacity additions. The focus of most RPS activity in the U.S. has been within the states. Nonetheless, the U.S. House of Representatives and Senate have, at different times, each passed versions of a Federal RPS; a Federal RPS, however, has not yet been signed into law. The design of an RPS can and does vary, but at its heart an RPS simply requires retail electricity suppliers (also called load-serving entities, or LSEs) to procure a certain minimum quantity of eligible renewable energy. An RPS establishes numeric targets for renewable energy supply, applies those targets to retail electricity suppliers, and seeks to encourage competition among renewable developers to meet the targets in a least-cost fashion. RPS purchase obligations generally increase over time, and retail suppliers typically must demonstrate compliance on an annual basis. Mandatory RPS policies are backed by various types of compliance enforcement mechanisms, and many--but not all--such policies include the trading of renewable energy certificates (RECs). Renewables portfolio standards are a relatively recent addition to the renewable energy policy landscape, and these policies continue to evolve. Keeping up with the design, early experience, and projected impacts of these programs is a challenge. This report seeks to fill this need by providing basic, factual information on RPS policies in the United States. It focuses on state-level initiatives, though a later section briefly discusses Federal developments as well. The report does not cover municipal-level renewable energy goals, unless required by state law. Similarly, this report focuses on mandatory state RPS requirements, though it also touches on non-binding renewable energy goals

  17. A Prospective Analysis of the Costs, Benefits, and Impacts of U.S. Renewable Portfolio Standards

    SciTech Connect

    Mai, Trieu; Wiser, Ryan; Barbose, Galen; Bird, Lori; Heeter, Jenny; Keyser, David; Krishnan, Venkat; Macknick, Jordan; Millstein, Dev

    2016-12-31

    As states have gained experience with renewable portfolio standards (RPS) policies, many have made significant revisions to existing programs. In 2015 and 2016, seven states raised and extended their final RPS targets, while another state enacted a new RPS policy (Barbose 2016b). Interest in expanding and strengthening state RPS programs may continue, while efforts like recent proposals in many states to repeal or freeze existing RPS policies may also persist. In either context, questions about the potential costs, benefits, and other impacts of RPS programs are usually central to the decision-making process. This report follows on previous analyses that have focused on the historical costs, benefits, and other impacts of existing state RPS programs (Heeter et al. 2014; Wiser et al. 2016a). This report examines RPS outcomes prospectively, considering both current RPS policies as well as a potential expansion of those policies. The goal of this work is to provide a consistent and independent analytical methodology for that examination. This analysis relies on National Renewable Energy Laboratory’s (NREL’s) Regional Energy Deployment System (ReEDS) model to estimate changes to the U.S. electric power sector across a number of scenarios and sensitivity cases, focusing on the 2015–2050 timeframe. Based on those modeled results, we evaluate the costs, benefits, and other impacts of renewable energy contributing to RPS compliance using the suite of methods employed in a number of recent studies sponsored by the U.S. Department of Energy (DOE): a report examining retrospective benefits and impacts of RPS programs (Wiser et al. 2016a), the Wind Vision report (DOE 2015), the On the Path to SunShot report focusing on environmental benefits (Wiser et al. 2016b), and the Hydropower Vision report (DOE 2016).

  18. Relationship of Solar Energy Installation Permits to Renewable Portfolio Standards and Insolation

    NASA Astrophysics Data System (ADS)

    Butler, Kirt Gordon

    Legislated renewable portfolio standards (RPSs) may not be the key to ensure forecast energy demands are met. States without a legislated RPS and with efficient permitting procedures were found to have approved and issued 28.57% more permits on average than those with a legislated RPS. Assessment models to make informed decisions about the need and effect of legislated RPSs do not exist. Decision makers and policy creators need to use empirical data and a viable model to resolve the debate over a nationally legislated RPS. The purpose of this cross-sectional study was to determine if relationships between the independent variables of RPS and insolation levels and the dependent variable of the percentage of permits approved would prove to be a viable model. The research population was 68 cities in the United States, of which 55 were used in this study. The return on investment economic decision model provided the theoretical framework for this study and the model generated. The output of multiple regression analysis indicated a weak to medium positive relationship among the variables. None of these relationships were statistically significant at the 0.05 level. A model using site specific data might yield significant results and be useful for determining which solar energy projects to pursue and where to implement them without Federal or State mandated RPSs. A viable model would bring about efficiency gains in the permitting process and effectiveness gains in promoting installations of solar energy-based systems. Research leading to the development of a viable model would benefit society by encouraging the development of sustainable energy sources and helping to meet forecast energy demands.

  19. [Quality prediction model of greenhouse standard cut chrysanthemum based on light-temperature effect].

    PubMed

    Yang, Zai-Qiang; Luo, Wei-Hong; Chen, Fa-Di; Gu, Jun-Jie; Li, Xiang-Mao; Ding, Qi-Feng; Zhao, Cai-Biao; Lu, Ya-Fan

    2007-04-01

    Based on the effects of light and temperature on chrysanthemum quality and the experiments with different chrysanthemum varieties and planting dates, a quality prediction model of greenhouse standard cut chrysanthemum with the physiological product of thermal effectiveness and PAR (PTEP) as the measurement scale was developed and validated. The results showed that the predicted results, including the number of unfolding leaves, leaf area, plant height, stem diameter, internode length and flower diameter, accorded well with the observed ones, and the determination coefficient (R2) and relative prediction error (RSE) based on 1 : 1 line were 0.99, 0.98, 0.98, 0.92, 0.87 and 0.88, and 5.5%, 6.5%, 5.9%, 4.1%, 11.2%, 12.4%, respectively. This model was of high precision and practicable, which could be used in optimizing the light and temperature management for greenhouse standard cut chrysanthemum production.

  20. EPA Reports: Automakers Beat Greenhouse Gas Emissions Standards for Third Straight Year Fuel economy steady at highest level ever recorded

    EPA Pesticide Factsheets

    (12/16/2015 -ATLANTA ) - The U.S. Environmental Protection Agency (EPA) today announced that manufacturers have surpassed the more stringent 2014 standards for greenhouse gas (GHG) emissions, while model year 2014 fuel economy remains steady at the h

  1. Comments on the Joint Proposed Rulemaking to Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards

    SciTech Connect

    Wenzel, Tom

    2009-10-27

    Tom Wenzel of Lawrence Berkeley National Laboratory comments on the joint rulemaking to establish greenhouse gas emission and fuel economy standards for light-duty vehicle, specifically on the relationship between vehicle weight and vehicle safety.

  2. An analysis of Renewable Portfolio Standard policy formulation and its influence on state level energy prices

    NASA Astrophysics Data System (ADS)

    McCollester, Peter Colin

    Over the past two decades, environmental concern has crept to the forefront of the world policy agenda. This concern has manifested itself differently throughout the world. In the United States, this has come in the form of Renewable Portfolio Standards (RPS) which have become one of the primary policy tools which states use to encourage renewable energy generation. The advent of RPS has spurred intense debate at a federal and state level, centering on the economic merits of promoting renewable energy generation. Detractors argue that RPS will raise electricity rates, since generation from renewable sources is typically costlier than energy generated from fossil fuels. At this point, evidence to the relationship between RPS on electricity prices remains unclear. Researchers have attempted to understand this relationship through a variety of means. The most common being regression based models, which utilize readily available United States Energy Information Agency (US EIA) data, and have uncovered a number of important independent variables which are incorporated into the model in this study. Examples include personal income, state population, and deregulation of an energy market. In addition to empirical studies, the National Renewable Energy Laboratory (NREL) has created complex mathematical models which generate scenario projections based on a number of assumptions. While interesting, these are forward looking tools and as such have not yielded a tremendous amount of insight into the underlying policy mechanics of RPS. A challenge of addressing this topic which is worth noting is that much of the research available which analyzes the merits of RPS caters to distinct political or private sector agendas. The research gathered for this study is comprehensive, and attempts to avoid studies with any clear political, ideological, or financial motivation. Using the insights from previous researchers this study develops a rigorous fixed effects regression model to

  3. An analysis of the impact of Renewable Portfolio Standards on residential electricity prices

    NASA Astrophysics Data System (ADS)

    Larson, Andrew James

    A Renewable Portfolio Standard (RPS) has become a popular policy for states seeking to increase the amount of renewable energy generated for consumers of electricity. The success of these state programs has prompted debate about the viability of a national RPS. The impact that these state level policies have had on the price consumers pay for electricity is the subject of some debate. Several federal organizations have conducted studies of the impact that a national RPS would have on electricity prices paid by consumers. NREL and US EIA utilize models that analyze the inputs in electricity generation to examine the future price impact of changes to electricity generation and show marginal increases in prices paid by end users. Other empirical research has produced similar results, showing that the existence of an RPS increases the price of electricity. These studies miss important aspects of RPS policies that may change how we view these price increases from RPS policies. By examining the previous empirical research on RPS policies, this study seeks to identify the controls necessary to build an effective model. These controls are utilized in a fixed effects model that seeks to show how the controls and variables of interest impact electricity prices paid by residential consumers of electricity. This study utilizes a panel data set from 1990 to 2014 to analyze the impact of these policies controlling for generating capacity, the regulatory status of utilities in each state, demographic characteristics of the states, and fuel prices. The results of the regressions indicate that prices are likely to be higher in states that have an RPS compared to states that do not have such a policy. Several of the characteristics mentioned above have price impacts, and so discussing RPS policies in the context of other factors that contribute to electricity prices is essential. In particular, the regulatory status of utilities in each state is an important determinate of price as

  4. 76 FR 57105 - Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-15

    ...EPA and NHTSA, on behalf of the Department of Transportation, are each finalizing rules to establish a comprehensive Heavy-Duty National Program that will reduce greenhouse gas emissions and fuel consumption for on-road heavy-duty vehicles, responding to the President's directive on May 21, 2010, to take coordinated steps to produce a new generation of clean vehicles. NHTSA's final fuel consumption standards and EPA's final carbon dioxide (CO2) emissions standards are tailored to each of three regulatory categories of heavy-duty vehicles: Combination Tractors; Heavy-duty Pickup Trucks and Vans; and Vocational Vehicles. The rules include separate standards for the engines that power combination tractors and vocational vehicles. Certain rules are exclusive to the EPA program. These include EPA's final hydrofluorocarbon standards to control leakage from air conditioning systems in combination tractors, and pickup trucks and vans. These also include EPA's final nitrous oxide (N2O) and methane (CH4) emissions standards that apply to all heavy- duty engines, pickup trucks and vans. EPA's final greenhouse gas emission standards under the Clean Air Act will begin with model year 2014. NHTSA's final fuel consumption standards under the Energy Independence and Security Act of 2007 will be voluntary in model years 2014 and 2015, becoming mandatory with model year 2016 for most regulatory categories. Commercial trailers are not regulated in this phase of the Heavy-Duty National Program. The agencies estimate that the combined standards will reduce CO2 emissions by approximately 270 million metric tons and save 530 million barrels of oil over the life of vehicles sold during the 2014 through 2018 model years, providing over $7 billion in net societal benefits, and $49 billion in net societal benefits when private fuel savings are considered. EPA is also finalizing provisions allowing light-duty vehicle manufacturers to use CO2 credits to meet the light-duty vehicle N2O and

  5. Using Teaching Portfolios.

    ERIC Educational Resources Information Center

    Painter, Bryan

    2001-01-01

    Teaching portfolios are not just scrapbooks of random assignments and student work samples, but represent teachers' evolving reflections and analyses measured against rigorous standards. Thoughtful reflection, not a color printer, is the key to portfolio success. Tips on assembling suitable "artifacts" and handling anxiety and time…

  6. Using Teaching Portfolios.

    ERIC Educational Resources Information Center

    Painter, Bryan

    2001-01-01

    Teaching portfolios are not just scrapbooks of random assignments and student work samples, but represent teachers' evolving reflections and analyses measured against rigorous standards. Thoughtful reflection, not a color printer, is the key to portfolio success. Tips on assembling suitable "artifacts" and handling anxiety and time…

  7. Electronic Portfolios for Whom?

    ERIC Educational Resources Information Center

    Ayala, Javier I.

    2006-01-01

    Electronic portfolios are a recent technology wave hitting the coast of higher education. Since 2000, more than 300 articles have appeared on the topic. Electronic portfolios are described as the panacea for potentially problematic issues ranging from student learning to standards, advising, job hunting, and assessment. The surge of attention…

  8. Of paradise and clean power: The effect of California's renewable portfolio standard on in-state renewable energy generation

    NASA Astrophysics Data System (ADS)

    Yin, Clifton Lee

    Renewable portfolio standards (RPS), policies that encourage acquisition of electricity from renewable energy sources, have become popular instruments for discouraging the use of climate change inducing-fossil fuels. There has been limited research, however, that empirically evaluates their effectiveness. Using data gathered by three governmental entities -- the federal-level Energy Information Administration and two California agencies, the Employment Development Department and the Department of Finance -- this paper investigates the impact of California's RPS, one of the nation's most ambitious such policies, on in-state renewable energy generation. It finds that the California RPS did not bring about a one-time increase in generation with its inception, nor did it compel an increase in generation over time. These results raise questions as to the best way to structure RPS policies in light of growing interest in the establishment of a national RPS.

  9. Calibration standards for major greenhouse gases and carbon monoxide: status and challenges.

    NASA Astrophysics Data System (ADS)

    Zellweger, Christoph; Mohn, Joachim; Wyss, Simon A.; Brewer, Paul; Mace, Tatiana; Nieuwenkamp, Gerard; Pearce-Hill, Ruth; Tarhan, Tanil; Walden, Jari; Emmenegger, Lukas

    2017-04-01

    Human influence on increasing greenhouse gas mole fractions in the atmosphere and effects on positive radiative forcing as well as observed global warming and sea level rise are well accepted [1]. For interpretation of global or continental scale greenhouse gas data, obtained from different laboratories, measurement results have to coincide within compatibility goals set by the World Meteorological Organization (WMO) [2]. Despite significant advances in measurement techniques [3], WMO compatibility goals are regularly missed, shown by round-robin experiments of standard gases and comparisons of field samples or parallel measurements. Therefore, precise and accurate calibration using standards with good long-term stability is needed to reduce uncertainties of atmospheric measurements. This is addressed by the WMO Global Atmosphere Watch Programme (GAW), where Central Calibration Laboratories (CCLs) maintain calibration scales to ensure consistency of measurements within the network to primary reference materials. Furthermore, participating GAW laboratories are supported by World Calibration Centres (WCCs) performing audits and organizing round-robin comparisons. The CCL participates regularly in comparisons with independent primary scales to assure traceability of established primary reference materials to fundamental quantities (SI) [e.g. 4]. Within the European Metrology Research Programme (EMRP) ENV52 project "Metrology for high-impact greenhouse gases" (HIGHGAS), static and dynamic primary reference gas mixtures for ambient levels of CO2, CH4, N2O and CO in air were prepared by different National Metrology Institutes (NMIs). In order to progress beyond the state of the art, research focused on improving passivation chemistry, quantification of target impurities in the air matrix, and determining the isotopic composition. These primary reference gas mixtures were compared in a round robin experiment against standards calibrated against reference gases currently

  10. Predictive Ability from ePortfolios of Student Achievement Associated with Professional Teaching Standards: An Exploratory Case Study

    ERIC Educational Resources Information Center

    Payne, Phillip; Burrack, Frederick

    2017-01-01

    This exploratory case study, focused on a music teacher preparation program, examined the coursework ePortfolios of pre-service music teachers to determine if any parts of the ePortfolio process predicted teaching effectiveness in the classroom during the student teaching semester. Sixty-five undergraduate pre-service music teachers made up the…

  11. 76 FR 65971 - Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-25

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION National Highway Traffic Safety Administration 49 CFR Parts 523 and 535 RIN 2127-AK74 Greenhouse Gas... will increase fuel efficiency and reduce greenhouse gas emissions for on-road heavy-duty...

  12. 76 FR 59922 - Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-28

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION National Highway Traffic Safety Administration 49 CFR Part 535 RIN 2127-AK74 Greenhouse Gas Emissions... greenhouse gas emissions for on-road heavy-duty vehicles, responding to the President's directive on May...

  13. 77 FR 51701 - EPA's Denial of the Petition To Reconsider the Greenhouse Gas Emissions Standards and Fuel...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-27

    ...The Environmental Protection Agency (EPA or Agency) is denying the petition of Plant Oil Powered Diesel Fuel Systems, Inc. (``POP Diesel'') to reconsider the final rules establishing emissions standards to reduce greenhouse gas emissions from on-road heavy-duty vehicles.

  14. Portfolio Acquisition

    DTIC Science & Technology

    2015-05-14

    pmodigliani@mitre.org (703) 983-9131 14 May 15 Portfolio Acquisition NPS Acquisition Research Symposium 2015 Report Documentation Page Form ApprovedOMB...00-00-2015 to 00-00-2015 4. TITLE AND SUBTITLE Portfolio Acquisition 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6...MITRE Corporation. All rights reserved. Portfolio Acquisition Concept Elevate acquisition elements up to a portfolio structure for speed

  15. Continued professional competence and portfolios.

    PubMed

    Byrne, Michelle; Delarose, Teresa; King, Cecil A; Leske, Jane; Sapnas, Kathryn G; Schroeter, Kathryn

    2007-01-01

    It is traditionally assumed that licensure of healthcare professionals means that they are minimally competent. Many nursing specialty organizations offer examinations and other processes for certification, suggesting that certification is associated with continued competency. Can standardized examination for certification and continuing education for recertification ensure continued competency? Continuing education and testing provide a limited picture of an individual's knowledge and/or skill acquisition in a limited area at one point in time. However, portfolios promote critical thinking, self-assessment, and individual accountability. A portfolio is a portable mechanism for evaluating competencies that may otherwise be difficult to assess. This article summarizes some of the literature addressing portfolios, including aspects of portfolio development process, the value of portfolios versus continuing education for competency assessment, evidence associated with portfolio usage, and suggestions for organizing nursing portfolios.

  16. Faculty/Staff Perceptions of a Standards-Based Exit Portfolio System for Graduate Students

    ERIC Educational Resources Information Center

    McNamara, Tena L.; Bailey, Rita L.

    2006-01-01

    New standards for certification were recently developed for speech-language pathology graduate training programs by the American Speech-Language-Hearing Association. The new standards are outcomes-based rather than process-based. Using a collective case study approach, this article highlights the perceptions of faculty and staff regarding use of a…

  17. Faculty/Staff Perceptions of a Standards-Based Exit Portfolio System for Graduate Students

    ERIC Educational Resources Information Center

    McNamara, Tena L.; Bailey, Rita L.

    2006-01-01

    New standards for certification were recently developed for speech-language pathology graduate training programs by the American Speech-Language-Hearing Association. The new standards are outcomes-based rather than process-based. Using a collective case study approach, this article highlights the perceptions of faculty and staff regarding use of a…

  18. EPA and NHTSA to Propose Greenhouse Gas and Fuel Efficiency Standards for Heavy-Duty Trucks; Begin Process for Further Light-Duty Standards Factsheet

    EPA Pesticide Factsheets

    This fact sheet is an overview of EPA and NHTSA's plan to reduce greenhouse gas emissions and improve fuel economy for heavy-duty trucks, and to adopt the 2nd phase of GHG and fuel economy standards for light-duty vehicles for MY 2017 and beyond.

  19. Multi-Year Analysis of Renewable Energy Impacts in California: Results from the Renewable Portfolio Standards Integration Cost Analysis; Preprint

    SciTech Connect

    Milligan, M.; Shiu, H.; Kirby, B.; Jackson, K.

    2006-08-01

    California's Renewable Portfolio Standard (RPS, Senate Bill 1078) requires the state's investor-owned utilities to obtain 20% of their energy mix from renewable generation sources. To facilitate the imminent increase in the penetration of renewables, the California Energy Commission (CEC), in support of the California Public Utility Commission (CPUC), initiated a study of integration costs in the context of RPS implementation. This effort estimated the impact of renewable generation in the regulation and load-following time scales and calculated the capacity value of renewable energy sources using a reliability model. The analysis team, consisting of researchers from the National Renewable Energy Laboratory (NREL), Oak Ridge National Laboratory (ORNL) and the California Wind Energy Collaborative (CWEC), performed the study in cooperation with the California Independent System Operator (CaISO), the Pacific Gas and Electric Company (PG&E), and Southern California Edison (SCE). The study was conducted over three phases and was followed by an analysis of a multi-year period. This paper presents results from the multi-year analysis and the Phase III recommendations.

  20. State-level renewable portfolio standards: Evaluating their effectiveness in increasing renewable electricity generation and reducing carbon emissions

    NASA Astrophysics Data System (ADS)

    Denneny, Matthew J.

    The renewable portfolio standard (RPS) is a key state-level policy instrument meant to encourage renewable energy development and address climate change by mandating increased electricity generation from low-carbon renewable sources. In analyzing the effectiveness of RPS policies, I hypothesize that these policies should increase renewable electricity generation and reduce carbon dioxide emissions from electricity generation. Additionally, I hypothesize that more stringent RPS policies should allow for greater increases in renewable energy generation and larger declines in CO2 emissions. To test these hypotheses, I use pooled and fixed effects models to examine how RPS policies play a role in affecting renewable electricity generation and CO 2 emissions. My results suggest that these policies increase electricity generation from renewable sources and that the stringency of these policies matters. However, the results are mixed in regard to their effectiveness in reducing CO2 emissions. These findings suggest that RPS policies as they are now may not be the best way to reduce CO2 emissions. Other policies that more directly target emissions may be necessary for states to see the emissions reductions they desire.

  1. Weighing the Costs and Benefits of Renewables Portfolio Standards:A Comparative Analysis of State-Level Policy Impact Projections

    SciTech Connect

    Chen, Cliff; Wiser, Ryan; Bolinger, Mark

    2007-01-16

    State renewables portfolio standards (RPS) have emerged as one of the most important policy drivers of renewable energy capacity expansion in the U.S. Collectively, these policies now apply to roughly 40% of U.S. electricity load, and may have substantial impacts on electricity markets, ratepayers, and local economies. As RPS policies have been proposed or adopted in an increasing number of states, a growing number of studies have attempted to quantify the potential impacts of these policies, focusing primarily on projecting cost impacts, but sometimes also estimating macroeconomic and environmental effects. This report synthesizes and analyzes the results and methodologies of 28 distinct state or utility-level RPS cost impact analyses completed since 1998. Together, these studies model proposed or adopted RPS policies in 18 different states. We highlight the key findings of these studies on the costs and benefits of RPS policies, examine the sensitivity of projected costs to model assumptions, assess the attributes of different modeling approaches, and suggest possible areas of improvement for future RPS analysis.

  2. Charging a renewable future: The impact of electric vehicle charging intelligence on energy storage requirements to meet renewable portfolio standards

    NASA Astrophysics Data System (ADS)

    Forrest, Kate E.; Tarroja, Brian; Zhang, Li; Shaffer, Brendan; Samuelsen, Scott

    2016-12-01

    Increased usage of renewable energy resources is key for energy system evolution to address environmental concerns. Capturing variable renewable power requires the use of energy storage to shift generation and load demand. The integration of plug-in electric vehicles, however, impacts the load demand profile and therefore the capacity of energy storage required to meet renewable utilization targets. This study examines how the intelligence of plug-in electric vehicle (PEV) integration impacts the required capacity of energy storage systems to meet renewable utilization targets for a large-scale energy system, using California as an example for meeting a 50% and 80% renewable portfolio standard (RPS) in 2030 and 2050. For an 80% RPS in 2050, immediate charging of PEVs requires the installation of an aggregate energy storage system with a power capacity of 60% of the installed renewable capacity and an energy capacity of 2.3% of annual renewable generation. With smart charging of PEVs, required power capacity drops to 16% and required energy capacity drops to 0.6%, and with vehicle-to-grid (V2G) charging, non-vehicle energy storage systems are no longer required. Overall, this study highlights the importance of intelligent PEV charging for minimizing the scale of infrastructure required to meet renewable utilization targets.

  3. Like Portfolios for Assessment (Middle School).

    ERIC Educational Resources Information Center

    Katz, Claudia Anne; Johnson-Kuby, Sue Ann

    1996-01-01

    Describes 10 variations on the portfolio for assessment: literacy portfolio, reflection portfolio, "reflection the beauty" portfolio, process portfolio, student portfolio, reading portfolio, featherweight portfolio, showcase portfolio, exit portfolio, and literacy portfolio revisited. Accompanies each one with a "recipe." (SR)

  4. Like Portfolios for Assessment (Middle School).

    ERIC Educational Resources Information Center

    Katz, Claudia Anne; Johnson-Kuby, Sue Ann

    1996-01-01

    Describes 10 variations on the portfolio for assessment: literacy portfolio, reflection portfolio, "reflection the beauty" portfolio, process portfolio, student portfolio, reading portfolio, featherweight portfolio, showcase portfolio, exit portfolio, and literacy portfolio revisited. Accompanies each one with a "recipe." (SR)

  5. Academics on Non-Standard Contracts in UK Universities: Portfolio Work, Choice and Compulsion

    ERIC Educational Resources Information Center

    Brown, Donna; Gold, Michael

    2007-01-01

    This paper analyses the profile and motivation of over 1,300 academics employed on part-time, fixed term or temporary contracts at 10 post-1992 UK universities, whom it categorises as "non-standard academics". Based on a questionnaire survey, it investigates their demographic background, including age, gender and ethnic background, as…

  6. 75 FR 74151 - Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-30

    ...EPA and NHTSA, on behalf of the Department of Transportation, are each proposing rules to establish a comprehensive Heavy-Duty National Program that will reduce greenhouse gas emissions and increase fuel efficiency for on-road heavy-duty vehicles, responding to the President's directive on May 21, 2010, to take coordinated steps to produce a new generation of clean vehicles. NHTSA's proposed......

  7. An evaluation of the impact of state Renewable Portfolio Standards (RPS) on retail, commercial, and industrial electricity prices

    NASA Astrophysics Data System (ADS)

    Puram, Rakesh

    The Renewable Portfolio Standard (RPS) has become a popular mechanism for states to promote renewable energy and its popularity has spurred a potential bill within Congress for a nationwide Federal RPS. While RPS benefits have been touted by several groups, it also has detractors. Among the concerns is that RPS standards could raise electricity rates, given that renewable energy is costlier than traditional fossil fuels. The evidence on the impact of RPS on electricity prices is murky at best: Complex models by NREL and USEIA utilize computer programs with several assumptions which make empirical studies difficult and only predict slight increases in electricity rates associated with RPS standards. Recent theoretical models and empirical studies have found price increases, but often fail to comprehensively include several sets of variables, which in fact could confound results. Utilizing a combination of past papers and studies to triangulate variables this study aims to develop both a rigorous fixed effects regression model as well as a theoretical framework to explain the results. This study analyzes state level panel data from 2002 to 2008 to analyze the effect of RPS on residential, commercial, and industrial electricity prices, controlling for several factors including amount of electricity generation from renewable and non-renewable sources, customer incentives for renewable energy, macroeconomic and demographic indicators, and fuel price mix. The study contrasts several regressions to illustrate important relationships and how inclusions as well as exclusion of various variables have an effect on electricity rates. Regression results indicate that the presence of RPS within a state increases the commercial and residential electricity rates, but have no discernable effect on the industrial electricity rate. Although RPS tends to increase electricity prices, the effect has a small impact on higher electricity prices. The models also indicate that jointly all

  8. Portfolio-based Teacher Assessment.

    ERIC Educational Resources Information Center

    Curry, Stacie; Cruz, John

    2000-01-01

    Educators in the Fowler (California) Unified School District have found that teacher evaluation portfolios help link improvement and accountability concerns in the peer review process. Portfolios that are structured around professional standards and the school's accountability goals are a good way to measure teacher effectiveness. Implementation…

  9. Portfolio Assessment.

    ERIC Educational Resources Information Center

    Dagavarian, Debra A.

    The portfolio assessment process at Thomas A. Edison State College is described in this report. Through portfolio assessment, the school helps students identify and gain credit for college-level skills and knowledge acquired through work, volunteer activities, independent reading, military or corporate training, and life experiences that may be…

  10. Using the ePortfolio to Complement Standardized Testing in a Healthcare Professional Program: Better Education or More Busy Work?

    ERIC Educational Resources Information Center

    Chan, Clarence

    2012-01-01

    This article evaluates the full-scale integration of the ePortfolio into a healthcare professional program in an open admissions community college in the United States. The Physical Therapist Assistant program in question struggles to balance the dynamic tension between preparing students for a summative multiple-choice licensing examination and…

  11. EPA and NHTSA, in Coordination with California, Announce Plans to Propose Greenhouse Gas and Fuel Economy Standards for Passenger Cars and Light Trucks Factsheet

    EPA Pesticide Factsheets

    This fact sheet announces the joint Supplemental Notice of Intent (NOI) by EPA and NHTSA on their plan to propose stringent federal greenhouse gas and fuel economy standards for light-duty vehicles in model years 2017-2025.

  12. Alternative Fuel Vehicle Adoption Increases Fleet Gasoline Consumption and Greenhouse Gas Emissions under United States Corporate Average Fuel Economy Policy and Greenhouse Gas Emissions Standards.

    PubMed

    Jenn, Alan; Azevedo, Inês M L; Michalek, Jeremy J

    2016-03-01

    The United States Corporate Average Fuel Economy (CAFE) standards and Greenhouse Gas (GHG) Emission standards are designed to reduce petroleum consumption and GHG emissions from light-duty passenger vehicles. They do so by requiring automakers to meet aggregate criteria for fleet fuel efficiency and carbon dioxide (CO2) emission rates. Several incentives for manufacturers to sell alternative fuel vehicles (AFVs) have been introduced in recent updates of CAFE/GHG policy for vehicles sold from 2012 through 2025 to help encourage a fleet technology transition. These incentives allow automakers that sell AFVs to meet less-stringent fleet efficiency targets, resulting in increased fleet-wide gasoline consumption and emissions. We derive a closed-form expression to quantify these effects. We find that each time an AFV is sold in place of a conventional vehicle, fleet emissions increase by 0 to 60 t of CO2 and gasoline consumption increases by 0 to 7000 gallons (26,000 L), depending on the AFV and year of sale. Using projections for vehicles sold from 2012 to 2025 from the Energy Information Administration, we estimate that the CAFE/GHG AFV incentives lead to a cumulative increase of 30 to 70 million metric tons of CO2 and 3 to 8 billion gallons (11 to 30 billion liters) of gasoline consumed over the vehicles' lifetimes - the largest share of which is due to legacy GHG flex-fuel vehicle credits that expire in 2016. These effects may be 30-40% larger in practice than we estimate here due to optimistic laboratory vehicle efficiency tests used in policy compliance calculations.

  13. Portfolio Management

    NASA Technical Reports Server (NTRS)

    Duncan, Sharon L.

    2011-01-01

    Enterprise Business Information Services Division (EBIS) supports the Laboratory and its functions through the implementation and support of business information systems on behalf of its business community. EBIS Five Strategic Focus Areas: (1) Improve project estimating, planning and delivery capability (2) Improve maintainability and sustainability of EBIS Application Portfolio (3) Leap forward in IT Leadership (4) Comprehensive Talent Management (5) Continuous IT Security Program. Portfolio Management is a strategy in which software applications are managed as assets

  14. Portfolio Management

    NASA Technical Reports Server (NTRS)

    Duncan, Sharon L.

    2011-01-01

    Enterprise Business Information Services Division (EBIS) supports the Laboratory and its functions through the implementation and support of business information systems on behalf of its business community. EBIS Five Strategic Focus Areas: (1) Improve project estimating, planning and delivery capability (2) Improve maintainability and sustainability of EBIS Application Portfolio (3) Leap forward in IT Leadership (4) Comprehensive Talent Management (5) Continuous IT Security Program. Portfolio Management is a strategy in which software applications are managed as assets

  15. Tools for Electronic Portfolios.

    ERIC Educational Resources Information Center

    Farmer, Lesley S. J.

    1997-01-01

    Electronic portfolios offer an alternative to grades and standardized tests because they store work compactly, accommodate a variety of media, and are easily accessible. This article examines storage methods: diskettes, Zip, Syquest, and Jaz drives; compact disk recordable (CD-R); local area networks (LAN); audio and videotapes and discusses…

  16. Tower-based greenhouse gas measurement network design—The National Institute of Standards and Technology North East Corridor Testbed

    NASA Astrophysics Data System (ADS)

    Lopez-Coto, Israel; Ghosh, Subhomoy; Prasad, Kuldeep; Whetstone, James

    2017-09-01

    The North-East Corridor (NEC) Testbed project is the 3rd of three NIST (National Institute of Standards and Technology) greenhouse gas emissions testbeds designed to advance greenhouse gas measurements capabilities. A design approach for a dense observing network combined with atmospheric inversion methodologies is described. The Advanced Research Weather Research and Forecasting Model with the Stochastic Time-Inverted Lagrangian Transport model were used to derive the sensitivity of hypothetical observations to surface greenhouse gas emissions (footprints). Unlike other network design algorithms, an iterative selection algorithm, based on a k-means clustering method, was applied to minimize the similarities between the temporal response of each site and maximize sensitivity to the urban emissions contribution. Once a network was selected, a synthetic inversion Bayesian Kalman filter was used to evaluate observing system performance. We present the performances of various measurement network configurations consisting of differing numbers of towers and tower locations. Results show that an overly spatially compact network has decreased spatial coverage, as the spatial information added per site is then suboptimal as to cover the largest possible area, whilst networks dispersed too broadly lose capabilities of constraining flux uncertainties. In addition, we explore the possibility of using a very high density network of lower cost and performance sensors characterized by larger uncertainties and temporal drift. Analysis convergence is faster with a large number of observing locations, reducing the response time of the filter. Larger uncertainties in the observations implies lower values of uncertainty reduction. On the other hand, the drift is a bias in nature, which is added to the observations and, therefore, biasing the retrieved fluxes.

  17. Switching portfolios.

    PubMed

    Singer, Y

    1997-08-01

    A constant rebalanced portfolio is an asset allocation algorithm which keeps the same distribution of wealth among a set of assets along a period of time. Recently, there has been work on on-line portfolio selection algorithms which are competitive with the best constant rebalanced portfolio determined in hindsight (Cover, 1991; Helmbold et al., 1996; Cover and Ordentlich, 1996). By their nature, these algorithms employ the assumption that high returns can be achieved using a fixed asset allocation strategy. However, stock markets are far from being stationary and in many cases the wealth achieved by a constant rebalanced portfolio is much smaller than the wealth achieved by an ad hoc investment strategy that adapts to changes in the market. In this paper we present an efficient portfolio selection algorithm that is able to track a changing market. We also describe a simple extension of the algorithm for the case of a general transaction cost, including the transactions cost models recently investigated in (Blum and Kalai, 1997). We provide a simple analysis of the competitiveness of the algorithm and check its performance on real stock data from the New York Stock Exchange accumulated during a 22-year period. On this data, our algorithm outperforms all the algorithms referenced above, with and without transaction costs.

  18. Comments on the Joint Proposed Rulemaking to Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards

    SciTech Connect

    Wenzel, Thomas P

    2009-10-27

    I appreciate the opportunity to provide comments on the joint rulemaking to establish greenhouse gas emission and fuel economy standards for light-duty vehicles. My comments are directed at the choice of vehicle footprint as the attribute by which to vary fuel economy and greenhouse gas emission standards, in the interest of protecting vehicle occupants from death or serious injury. I have made several of these points before when commenting on previous NHTSA rulemakings regarding CAFE standards and safety. The comments today are mine alone, and do not necessarily represent the views of the US Department of Energy, Lawrence Berkeley National Laboratory, or the University of California. My comments can be summarized as follows: (1) My updated analysis of casualty risk finds that, after accounting for drivers and crash location, there is a wide range in casualty risk for vehicles with the same weight or footprint. This suggests that reducing vehicle weight or footprint will not necessarily result in increased fatalities or serious injuries. (2) Indeed, the recent safety record of crossover SUVs indicates that weight reduction in this class of vehicles resulted in a reduction in fatality risks. (3) Computer crash simulations can pinpoint the effect of specific design changes on vehicle safety; these analyses are preferable to regression analyses, which rely on historical vehicle designs, and cannot fully isolate the effect of specific design changes, such as weight reduction, on crash outcomes. (4) There is evidence that automakers planned to build more large light trucks in response to the footprint-based light truck CAFE standards. Such an increase in the number of large light trucks on the road may decrease, rather than increase, overall safety.

  19. EPA and DOT Propose Greenhouse Gas and Fuel Efficiency Standards for Heavy-Duty Trucks

    EPA Pesticide Factsheets

    (06/19/15) ATLANTA - The U.S. Environmental Protection Agency (EPA) and the Department of Transportation's National Highway Traffic Safety Administration (NHTSA) are jointly proposing standards for medium- and heavy-duty vehicles that would improve

  20. Greenhouse Gases

    MedlinePlus

    ... and the Environment Greenhouse Gases Effect on the Climate Where Greenhouse Gases Come From Outlook for Future ... greenhouse effect that results in global warming and climate change. Many gases exhibit these greenhouse properties. Some ...

  1. Physics Portfolios

    ERIC Educational Resources Information Center

    Whitworth, Brooke A.; Bell, Randy L.

    2013-01-01

    Traditionally, teachers assess students' physics understanding through lab activities, responses to open-ended word problems, and tests. But there is another way to measure student understanding, one in which students apply their learning to the world around them. This article shows how to implement student portfolios, which allow students to…

  2. Physics Portfolios

    ERIC Educational Resources Information Center

    Whitworth, Brooke A.; Bell, Randy L.

    2013-01-01

    Traditionally, teachers assess students' physics understanding through lab activities, responses to open-ended word problems, and tests. But there is another way to measure student understanding, one in which students apply their learning to the world around them. This article shows how to implement student portfolios, which allow students to…

  3. Electronic Portfolios.

    ERIC Educational Resources Information Center

    Purves, Alan C.

    1996-01-01

    Outlines three forms of electronic portfolio based on a student's work, a class project about a specific topic, and a class seminar on a broad topic. Discusses logistical problems of management, access, and cross-referencing; technical problems of input, access, and copying; and theoretical issues of the lack of realia, of ownership and copyright,…

  4. Determination of diagnostic standards on saturated soil extracts for cut roses grown in greenhouses

    PubMed Central

    Cabrera, Raúl Iskander

    2017-01-01

    This work comprises the theoretical determination and validation of diagnostic standards for the analysis of saturated soil extracts for cut rose flower crops (Rosa spp.) growing in the Bogota Plateau, Colombia. The data included 684 plant tissue analyses and 684 corresponding analyses of saturated soil extracts, all collected between January 2009 and June 2013. The tissue and soil samples were selected from 13 rose farms, and from cultivars grafted on the 'Natal Briar' rootstock. These concurrent samples of soil and plant tissues represented 251 production units (locations) of approximately 10,000 m2 distributed across the study area. The standards were conceived as a tool to improve the nutritional balance in the leaf tissue of rose plants and thereby define the norms for expressing optimum productive potential relative to nutritional conditions in the soil. To this end, previously determined diagnostic standard for rose leaf tissues were employed to obtain rates of foliar nutritional balance at each analyzed location and as criteria for determining the diagnostic norms for saturated soil extracts. Implementing this methodology to foliar analysis, showed a higher significant correlation for diagnostic indices. A similar behavior was observed in saturated soil extracts analysis, becoming a powerful tool for integrated nutritional diagnosis. Leaf analyses determine the most limiting nutrients for high yield and analyses of saturated soil extracts facilitate the possibility of correcting the fertigation formulations applied to soils or substrates. Recommendations are proposed to improve the balance in soil-plant system with which the possibility of yield increase becomes more probable. The main recommendations to increase and improve rose crop flower yields would be: continuously check pH values of SSE, reduce the amounts of P, Fe, Zn and Cu in fertigation solutions and carefully analyze the situation of Mn in the soil-plant system. PMID:28542547

  5. Determination of diagnostic standards on saturated soil extracts for cut roses grown in greenhouses.

    PubMed

    Franco-Hermida, John Jairo; Quintero, María Fernanda; Cabrera, Raúl Iskander; Guzman, José Miguel

    2017-01-01

    This work comprises the theoretical determination and validation of diagnostic standards for the analysis of saturated soil extracts for cut rose flower crops (Rosa spp.) growing in the Bogota Plateau, Colombia. The data included 684 plant tissue analyses and 684 corresponding analyses of saturated soil extracts, all collected between January 2009 and June 2013. The tissue and soil samples were selected from 13 rose farms, and from cultivars grafted on the 'Natal Briar' rootstock. These concurrent samples of soil and plant tissues represented 251 production units (locations) of approximately 10,000 m2 distributed across the study area. The standards were conceived as a tool to improve the nutritional balance in the leaf tissue of rose plants and thereby define the norms for expressing optimum productive potential relative to nutritional conditions in the soil. To this end, previously determined diagnostic standard for rose leaf tissues were employed to obtain rates of foliar nutritional balance at each analyzed location and as criteria for determining the diagnostic norms for saturated soil extracts. Implementing this methodology to foliar analysis, showed a higher significant correlation for diagnostic indices. A similar behavior was observed in saturated soil extracts analysis, becoming a powerful tool for integrated nutritional diagnosis. Leaf analyses determine the most limiting nutrients for high yield and analyses of saturated soil extracts facilitate the possibility of correcting the fertigation formulations applied to soils or substrates. Recommendations are proposed to improve the balance in soil-plant system with which the possibility of yield increase becomes more probable. The main recommendations to increase and improve rose crop flower yields would be: continuously check pH values of SSE, reduce the amounts of P, Fe, Zn and Cu in fertigation solutions and carefully analyze the situation of Mn in the soil-plant system.

  6. Market-driven automotive industry compliance with fuel economy and greenhouse gas standards: Analysis based on consumer choice

    DOE PAGES

    Xie, Fei; Lin, Zhenhong

    2017-06-09

    This paper explored factors that affect market-driven compliance with both Corporate Average Fuel Economy (CAFE) and greenhouse gas (GHG) standards (together called the National Program) in the United States for phase I 2012–2016 and phase II 2017–2025. We considered a consumer-choice-based simulation approach, using the MA3T model, to estimate the market acceptance of fuel efficiency (FE) technologies and alternative fuel technologies as reflected by new sales of light-duty vehicle (LDV). Because both full and extremely low FE valuations are common in the literature, we use a moderate assumption of a 10-year perceived vehicle lifetime at a 7% annual discount ratemore » in the baseline and include both extreme views (5 years and 15 years) in the sensitivity analysis. The study focuses on market-driven compliance and therefore excludes manufacturers’ cross-subsidization. The model results suggest that the LDV industry is able to comply with both standards even without cross-subsidization and with projected high technology cost, mainly thanks to the multiple credit programs and technology advancements. The compliance robustness, while encouraging, however is based on moderate market assumptions, such as Annual Energy Outlook 2016 Reference oil price projection and moderate FE consumer valuation. Finally, sensitivity analysis results reveal two significant risk factors for compliance: low oil prices and consumers’ FE undervaluation.« less

  7. Evaluating a Portfolio System.

    ERIC Educational Resources Information Center

    Smit, David W.

    1990-01-01

    Contributes to the knowledge of portfolio systems for writing evaluation by sharing evaluative procedures and their results. Reports on the results of a survey of students evaluated using a portfolio system. Finds that students preferred the portfolio system. (RS)

  8. 40 CFR 86.1818-12 - Greenhouse gas emission standards for light-duty vehicles, light-duty trucks, and medium-duty...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 19 2010-07-01 2010-07-01 false Greenhouse gas emission standards for light-duty vehicles, light-duty trucks, and medium-duty passenger vehicles. 86.1818-12 Section 86.1818-12 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY...

  9. On-Line Support and Portfolio Assessment for NETS-T Standards In Pre-Service Programs at a Large Southeastern University.

    ERIC Educational Resources Information Center

    Shoffner, Mary B.; Dias, Laurie B.

    This paper details the theoretical underpinnings of one university's approach to technology integration in its pre-service teacher preparation programs, and the results of a continuous, feedback-driven project to evaluate for technology integration through a student portfolio development process. Portfolios are assessed for multiple education and…

  10. Teacher Portfolios: Pathways to Teacher Empowerment.

    ERIC Educational Resources Information Center

    Beck, Judy; Weiland, Lynn

    2001-01-01

    Describes three types of teacher portfolios: employment portfolio, learning portfolio, and assessment portfolio. Provides information from the Learning Community program that uses teacher portfolios in teacher education. (ASK)

  11. Impact of the renewable oxygenate standard for reformulated gasoline on ethanol demand, energy use, and greenhouse gas emissions

    SciTech Connect

    Stork, K.C.; Singh, M.K.

    1995-04-01

    To assure a place for renewable oxygenates in the national reformulated gasoline (RFG) program, the US Environmental Protection Agency has promulgated the renewable oxygenate standard (ROS) for RFG. It is assumed that ethanol derived from corn will be the only broadly available renewable oxygenate during Phase I of the RFG program. This report analyzes the impact that the ROS could have on the supply of ethanol, its transported volume, and its displacement from existing markets. It also considers the energy and crude oil consumption and greenhouse gas (GHG) emissions that could result from the production and use of various RFGs that could meet the ROS requirements. The report concludes that on the basis of current and projected near-term ethanol capacity, if ethanol is the only available renewable oxygenate used to meet the requirements of the ROS, diversion of ethanol from existing use as a fuel is likely to be necessary. Year-round use of ethanol and ETBE would eliminate the need for diversion by reducing winter demand for ethanol. On an RFG-program-wide basis, using ethanol and ETBE to satisfy the ROS can be expected to slightly reduce fossil energy use, increase crude oil use, and have essentially no effect on GHG emissions or total energy use relative to using RFG oxygenated only with MTBE.

  12. Portfolio Development for Teacher Candidates. ERIC Digest.

    ERIC Educational Resources Information Center

    Takona, James P.

    This Digest is intended to help teacher candidates systematically gauge their progress toward the teaching profession by developing a portfolio. Portfolios are one way to assess teacher candidates, and they are a major requirement for experienced teachers seeking board certification from the National Board for Professional Teaching Standards. The…

  13. Assessment with Portfolio and Rubric Use.

    ERIC Educational Resources Information Center

    Ediger, Marlow

    The use of portfolios and rubrics in assessment developed in part as a reaction to limitations of standardized tests for student evaluation. Portfolios relate directly to what students are learning, but there are many problems in evaluating their contents. These center on: (1) time involved in scoring; (2) lack of validity statistics; (3) relative…

  14. Developing and Validating a Design for Teacher Portfolio Assessment

    ERIC Educational Resources Information Center

    van der Schaaf, M. F.; Stokking, K. M.

    2008-01-01

    Developing and using a design for teacher portfolio assessment is a complex process including several components: the domain to be assessed (the teacher competences), the content standards or criteria, the portfolio format, the completion of the format (by teachers) with content, and the scoring of the portfolios (by raters). For a portfolio…

  15. Teacher Beliefs and Teacher Behaviour in Portfolio Assessment

    ERIC Educational Resources Information Center

    van der Schaaf, Marieke F.; Stokking, Karel M.; Verloop, Nico

    2008-01-01

    This study concerns the relation between teachers' beliefs towards teaching behaviour and their actual teaching behaviour in teacher portfolio assessment. We analysed the beliefs and behaviour of 18 teachers as described in their portfolios. In addition, each portfolio was independently assessed by two trained raters on eight content standards and…

  16. Evaluating, Comparing, and Best Practice in Electronic Portfolio System Use

    ERIC Educational Resources Information Center

    San Jose, David L.

    2017-01-01

    Electronic portfolios (e-portfolios) are commonly positioned to show evidence of student learning with formative and summative assessment benefits. At the University of Auckland teacher education program, two e-portfolio systems were adopted to document preservice teacher's course work and to attest to the Graduating Teacher Standards. This…

  17. Teacher Beliefs and Teacher Behaviour in Portfolio Assessment

    ERIC Educational Resources Information Center

    van der Schaaf, Marieke F.; Stokking, Karel M.; Verloop, Nico

    2008-01-01

    This study concerns the relation between teachers' beliefs towards teaching behaviour and their actual teaching behaviour in teacher portfolio assessment. We analysed the beliefs and behaviour of 18 teachers as described in their portfolios. In addition, each portfolio was independently assessed by two trained raters on eight content standards and…

  18. Summary of Recommendations: Legislative and Regulatory Actions to Consider for Ensuring the Long-Term Effectiveness of the Nevada Renewable Portfolio Standard

    SciTech Connect

    Porter, Kevin; Grace, Robert; Wiser, Ryan

    2004-10-29

    In 2001, the Nevada Legislature passed an aggressive renewable portfolio standard (Nevada RPS) that called for 5% of each major utility's resource mix to come from eligible renewable energy by 2003, rising by 2% every two years to 15% by 2013. Of the RPS standard, 5% per year must come from solar energy. The early performance of the Nevada RPS is generally considered to be disappointing. So far, only a small quantity of electricity state wide has been generated by new renewable energy systems. The utilities and many other stakeholders appear to agree that the utilities, which were unable to fully comply with the RPS in 2003, will continue to have difficulty complying in 2004 and 2005, and perhaps beyond. To date, there have been several efforts to improve compliance with the RPS (such as California and New Mexico). Other states in the region are also motivated to develop their renewable resources, and some have adopted RPS policies. A workshop as held on November 4, 2004 in Reno in order to address additional measures available to strengthen the Nevada RPS, and to consider the implications and potential interaction with RPS policies in nearby states. The purpose of this report is to identify and summarize the top policy priorities, from among those identified and discussed at the November 4, 2004 Reno Workshop, to be considered by the Nevada Renewable Energy and Energy Efficiency Task Force for implementation.

  19. The Reality of Assessing "Authentic" Electronic Portfolios: Can Electronic Portfolios Serve as a Form of Standardized Assessment to Measure Literacy and Self-Regulated Learning at the Elementary Level?

    ERIC Educational Resources Information Center

    Bures, Eva Mary; Barclay, Alexandra; Abrami, Philip C.; Meyer, Elizabeth J.

    2013-01-01

    This study explores electronic portfolios and their potential to assess student literacy and selfregulated learning in elementary-aged children. Assessment tools were developed and include a holistic rubric that assigns a mark from 1 to 5 to self-regulated learning (SRL) and a mark to literacy, and an analytical rubric measuring multiple…

  20. Coastal Navigation Portfolio Management

    DTIC Science & Technology

    2015-02-19

    CIRP.aspx Coastal Inlets Research Program Coastal Navigation Portfolio Management The Coastal Navigatoin Portfolio Management work unit...across the vast coastal navigation portfolio of projects. The USACE maintains a vast infrastructure portfolio of deep-draft coastal entrance...the Corps needs to be able to direct resources at the navigation projects that are most critical to overall marine transportation system performance

  1. E-Portfolios: Issues in Assessment, Accountability and Preservice Teacher Preparation.

    ERIC Educational Resources Information Center

    Barrett, Helen; Knezek, Don

    This paper discusses issues of assessment, accountability, and preservice teacher preparation using electronic portfolios (e-portfolios). It discusses criteria for portfolio design and trends in e-portfolio use to collect evidence of the competencies of preservice teachers that are related to teaching standards. The paper also discusses the…

  2. The policy effects of feed-in tariff and renewable portfolio standard: A case study of China's waste incineration power industry.

    PubMed

    Xin-Gang, Zhao; Yu-Zhuo, Zhang; Ling-Zhi, Ren; Yi, Zuo; Zhi-Gong, Wu

    2017-10-01

    Among the regulatory policies, feed-in tariffs (FIT) and renewable portfolio standards (RPS) are the most popular to promote the development of renewable energy power industry. They can significantly contribute to the expansion of domestic industrial activities in terms of sustainable energy. This paper uses system dynamics (SD) to establish models of long-term development of China's waste incineration power industry under FIT and RPS schemes, and provides a case study by using scenario analysis method. The model, on the one hand, not only clearly shows the complex logical relationship between the factors but also assesses policy effects of the two policy tools in the development of the industry. On the other hand, it provides a reference for scholars to study similar problems in different countries, thereby facilitating an understanding of waste incineration power's long-term sustainable development pattern under FIT and RPS schemes, and helping to provide references for policy-making institutions. The results show that in the perfect competitive market, the implementation of RPS can promote long-term and rapid development of China's waste incineration power industry given the constraints and actions of the mechanisms of RPS quota proportion, the TGC valid period, and fines, compared with FIT. At the end of the paper, policy implications are offered as references for the government. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Weighing the Costs and Benefits of State Renewables Portfolio Standards in the United States: A Comparative Analysis of State-Level Policy Impact Projections

    SciTech Connect

    Chen, Cliff; Wiser, Ryan; Mills, Andrew; Bolinger, Mark

    2008-01-07

    State renewables portfolio standards (RPS) have emerged as one of the most important policy drivers of renewable energy capacity expansion in the U.S. As RPS policies have been proposed or adopted in an increasing number of states, a growing number of studies have attempted to quantify the potential impacts of these policies, focusing primarily on cost impacts, but sometimes also estimating macroeconomic, risk reduction, and environmental effects. This article synthesizes and analyzes the results and methodologies of 31 distinct state or utility-level RPS cost-impact analyses completed since 1998. Together, these studies model proposed or adopted RPS policies in 20 different states. We highlight the key findings of these studies on the projected costs of state RPS policies, examine the sensitivity of projected costs to model assumptions, evaluate the reasonableness of key input assumptions, and suggest possible areas of improvement for future RPS analyses. We conclude that while there is considerable uncertainty in the study results, the majority of the studies project modest cost impacts. Seventy percent of the state RPS cost studies project retail electricity rate increases of no greater than one percent. Nonetheless, there is considerable room for improving the analytic methods, and therefore accuracy, of these estimates.

  4. Proposed Rule and Related Materials for Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles

    EPA Pesticide Factsheets

    EPA and NHTSA, on behalf of the Department of Transportation, each proposed rules to establish a comprehensive Heavy-Duty National Program to reduce greenhouse gas emissions and increase fuel efficiency for onroad heavy-duty vehicles.

  5. 12 CFR 365.2 - Real estate lending standards.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...) Loan portfolio diversification standards; (ii) Prudent underwriting standards, including loan-to-value... portfolio; and (iv) Documentation, approval, and reporting requirements to monitor compliance with the...

  6. On the evolving portfolio of community-standards and data sharing policies: turning challenges into new opportunities.

    PubMed

    Sansone, Susanna-Assunta; Rocca-Serra, Philippe

    2012-07-12

    There are thousands of biology databases with hundreds of terminologies, reporting guidelines, representations models, and exchange formats to help annotate, report, and share bioscience investigations. It is evident, however, that researchers and bioinformaticians struggle to navigate the various standards and to find the appropriate database to collect, manage, and share data. Further, policy makers, funders, and publishers lack sufficient information to formulate their guidelines. In this paper, we highlight a number of key issues that can be used to turn these challenges into new opportunities. It is time for all stakeholders to work together to reconcile cause and effect and make the data-sharing culture functional and efficient.

  7. US EPA, US DOT, California’s Air Resources Board Issue Draft Technical Assessment Report of Greenhouse Gas Emissions and Fuel Economy Standards for Model Year 2022-2025 Cars and Light Trucks

    EPA Pesticide Factsheets

    EPA News Release: US EPA, US DOT, California’s Air Resources Board Issue Draft Technical Assessment Report of Greenhouse Gas Emissions and Fuel Economy Standards for Model Year 2022-2025 Cars and Light Trucks

  8. Interim Joint Technical Assessment Report: Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards for Model Years 2017-2025

    EPA Pesticide Factsheets

    EPA and the NHTSA collaborated with CARB on this joint Technical Assessment Report to build on the success of the first phase of the National Program to regulate fuel economy and greenhouse gas (GHG) emissions from U.S. light-duty vehicles.

  9. Implementing Portfolio Assessment

    ERIC Educational Resources Information Center

    Harris, Mauree Elizabeth

    2009-01-01

    Portfolio assessment is a valuable form of authentic assessment. Once early childhood educators understand the purposes of appropriate assessment, they can use portfolios to scaffold individual children's learning. This article discusses the purposes of portfolio assessment and describes the different benefits it provide for children, families,…

  10. Portfolio Development: Some Considerations.

    ERIC Educational Resources Information Center

    Chatel, Regina G.

    Generally speaking, a portfolio is a systematic collection of a variety of student projects or artifacts, collected over time, that reflect a student's developmental progress made in one or more areas. For the class, "Portfolio Development in Reading and Language Arts Courses" (EDUC 508 at Saint Joseph College), the portfolio will…

  11. Comprehensive Education Portfolio with a Career Focus

    ERIC Educational Resources Information Center

    Kruger, Evonne J.; Holtzman, Diane M.; Dagavarian, Debra A.

    2013-01-01

    There are many types of student portfolios used within academia: the prior learning portfolio, credentialing portfolio, developmental portfolio, capstone portfolio, individual course portfolio, and the comprehensive education portfolio. The comprehensive education portfolio (CEP), as used by the authors, is a student portfolio, developed over…

  12. Analysis of renewable portfolio standards

    SciTech Connect

    Bernow, S.; Dougherty, W.; Duckworth, M.

    1997-12-31

    A national RPS would increase the fraction of U.S. electricity generation from renewable technologies at least cost. It would help ensure that the cost and performance of these technologies would improve with manufacturing experience, scale economies, and learning-by-doing from their integration into electric systems. Thus, their economic, environmental, energy security, and sustainability benefits would be realized.

  13. E-portfolios for the aspiring professional.

    PubMed

    Andre, Kate

    2010-01-01

    The introduction of the ANMC's Continuing Competence Framework means that an increasing number of Australian Registered Nurses and Registered Midwives will be required to submit a portfolio if audited in order to maintain their registration. As several professional organisations and State regulatory authorities have already demonstrated, nurses and midwives will be supported to do this. However there is a risk that individuals commencing a portfolio for the first time will attempt to deal with the requirement by focussing on the minimum standards set by the regulatory authorities. Critics of the use of professional portfolios are quite correct, compiling and managing a portfolio can be a time consuming and irrelevant process if not well implemented. As this article will elaborate, e-Portfolios have a range of potential professional benefits including supporting individuals through a critical reflective approach to competency development, supporting professional collaboration and providing a structure for planning their career progression. This article provides an overview of the potential benefits of e-Portfolio platforms including detailing the capacities for information storage and recall and the provision of tools to support structuring and reporting information to further develop and communicate professional achievements. The objective is to entice the ambitious professional and their employers/professional associations to consider utilizing the extended capacities of e-Portfolios.

  14. Use of Reflective Portfolios in Health Sciences Education

    PubMed Central

    Draugalis, JoLaine Reierson; Slack, Marion K.; Skrepnek, Grant H.; Sauer, Karen Ann

    2007-01-01

    Reflective portfolios are a collection of evidence that through critical reflection on its contents demonstrate achievement as well as personal and professional development. The purpose of this paper is to provide a review of the literature on the use of reflective portfolios and to develop a set of factors to guide schools and colleges of pharmacy as they implement reflective portfolios into their respective curricula as stated in Standards 2007. PMID:17533443

  15. Using Portfolios To Foster Independent Thinking.

    ERIC Educational Resources Information Center

    Duffy, Mary Lou; Jones, Joanna; Thomas, Susan W.

    1999-01-01

    Presents a process for using portfolio assessment to encourage critical thinking and decision making by students. Four specific types of levels of portfolios are described: the everything portfolio (or development portfolio), the product portfolio, the showcase portfolio (or exemplary portfolio), and the objective portfolio. (Author/CR)

  16. Risk modelling in portfolio optimization

    NASA Astrophysics Data System (ADS)

    Lam, W. H.; Jaaman, Saiful Hafizah Hj.; Isa, Zaidi

    2013-09-01

    Risk management is very important in portfolio optimization. The mean-variance model has been used in portfolio optimization to minimize the investment risk. The objective of the mean-variance model is to minimize the portfolio risk and achieve the target rate of return. Variance is used as risk measure in the mean-variance model. The purpose of this study is to compare the portfolio composition as well as performance between the optimal portfolio of mean-variance model and equally weighted portfolio. Equally weighted portfolio means the proportions that are invested in each asset are equal. The results show that the portfolio composition of the mean-variance optimal portfolio and equally weighted portfolio are different. Besides that, the mean-variance optimal portfolio gives better performance because it gives higher performance ratio than the equally weighted portfolio.

  17. The Audiovisual Portfolio.

    ERIC Educational Resources Information Center

    Williams, Eugene

    1979-01-01

    Describes the development of an audiovisual portfolio, consisting of a student teaching notebook, slide narrative presentation, audiotapes, and a videotape-- valuable for prospective teachers in job interviews. (CMV)

  18. Involving Classroom Teachers in the Assessment of Preservice Intern Portfolios.

    ERIC Educational Resources Information Center

    Rakow, Steven J.

    1999-01-01

    The University of Houston-Clear Lake requires preservice teachers to develop a portfolio to demonstrate their proficiency in seven standard areas. The portfolios are developed and assessed under the guidance of university faculty and mentor teachers at the public schools. This team assessment provides interns more extensive and objective feedback,…

  19. E-Portfolios in Teacher Education: The UNBC Experience

    ERIC Educational Resources Information Center

    Kitchenham, Andrew

    2008-01-01

    This paper presents the preliminary findings from the University of Northern British Columbia's e-portfolio project, entitled the Digital Record of Student Success (DRSS). The e-portfolio requires that the Education Program students provide artifacts of their learning related to the British Columbia College of Teachers' 13 standards for…

  20. E-Portfolios in Teacher Education Using TaskStream

    ERIC Educational Resources Information Center

    Hall, Tim; Kiggins, Beth; Weimer, George

    2005-01-01

    After two years of unsuccessful pilot programs for e-portfolio development within the Teacher Education Department at the University of Indianapolis, implementation of an INTASC (Interstate New Teacher Assessment and Support Consortium) standards-based assessment system including digital portfolio building using TaskStream (TS) seems to hold…

  1. Designing e-Portfolios to Support Professional Teacher Preparation

    ERIC Educational Resources Information Center

    Tran, Tu; Baker, Robert; Pensavalle, Margo

    2006-01-01

    Tu Tran, Robert Baker, and Margo Pensavalle present e-portfolio technology as an effective tool in teacher preparation. Because e-portfolios chronicle students' learning outcomes, they provide a picture of students' development that can be used in response to increased demands for assessment of student teachers and increasingly standards-based…

  2. Electronic Portfolios in Teacher Education Reading Methods Courses.

    ERIC Educational Resources Information Center

    Piper, Carla Hagen

    The question of how to use technology effectively in the assessment of teacher candidates to demonstrate achievement of course objectives based on state certification standards led to the development of the electronic portfolio project at a small university teacher credential program. The process of preparing an electronic portfolio using computer…

  3. Digital-Age Assessment: E-Portfolios Are the Wave of the Future

    ERIC Educational Resources Information Center

    Tuttle, Harry Grover

    2007-01-01

    Effective 21st century assessment reaches beyond traditional testing to look at the broader accomplishments of learners. Assembling an e-portfolio, or electronic portfolio, is an excellent method for assessing students' progress toward school, state, or national academic standards, as well as 21st century skills. An electronic portfolio is a…

  4. Digital-Age Assessment: E-Portfolios Are the Wave of the Future

    ERIC Educational Resources Information Center

    Tuttle, Harry Grover

    2007-01-01

    Effective 21st century assessment reaches beyond traditional testing to look at the broader accomplishments of learners. Assembling an e-portfolio, or electronic portfolio, is an excellent method for assessing students' progress toward school, state, or national academic standards, as well as 21st century skills. An electronic portfolio is a…

  5. A Science Portfolio

    ERIC Educational Resources Information Center

    Roecker, Lee; Baltisberger, Jay; Saderholm, Matthew; Smithson, Paul; Blair, Larry

    2007-01-01

    The use of portfolios has had a positive impact on students, faculty, and the program in the Chemistry Department at Berea College. The portfolio allows for the inclusion in the curriculum of activities that occur outside of the classroom and offers a convenient means to monitor student participation in those activities. In addition to guiding…

  6. Using Electronic Portfolios

    ERIC Educational Resources Information Center

    Page, Deb

    2012-01-01

    The digitized collections of artifacts known as electronic portfolios are creating solutions to a variety of performance improvement needs in ways that are cost-effective and improve both individual and group learning and performance. When social media functionality is embedded in e-portfolios, the tools support collaboration, social learning,…

  7. Defense Portfolio Analysis

    DTIC Science & Technology

    2009-06-01

    COTS PPM Suite #2: Primavera Systems Project Portfolio Management ............................................................37 c. COTS PPM Suite...and Tracking Projects/Programs/Applications Throughout Their Life Cycle ............... 36 Figure 20. Sample Primavera Project Portfolio Management...Tool .......................... 38 Figure 21. Primavera PPM Sample Application Analysis ........................................ 38 Figure 22

  8. Leptokurtic portfolio theory

    NASA Astrophysics Data System (ADS)

    Kitt, R.; Kalda, J.

    2006-03-01

    The question of optimal portfolio is addressed. The conventional Markowitz portfolio optimisation is discussed and the shortcomings due to non-Gaussian security returns are outlined. A method is proposed to minimise the likelihood of extreme non-Gaussian drawdowns of the portfolio value. The theory is called Leptokurtic, because it minimises the effects from “fat tails” of returns. The leptokurtic portfolio theory provides an optimal portfolio for investors, who define their risk-aversion as unwillingness to experience sharp drawdowns in asset prices. Two types of risks in asset returns are defined: a fluctuation risk, that has Gaussian distribution, and a drawdown risk, that deals with distribution tails. These risks are quantitatively measured by defining the “noise kernel” — an ellipsoidal cloud of points in the space of asset returns. The size of the ellipse is controlled with the threshold parameter: the larger the threshold parameter, the larger return are accepted for investors as normal fluctuations. The return vectors falling into the kernel are used for calculation of fluctuation risk. Analogously, the data points falling outside the kernel are used for the calculation of drawdown risks. As a result the portfolio optimisation problem becomes three-dimensional: in addition to the return, there are two types of risks involved. Optimal portfolio for drawdown-averse investors is the portfolio minimising variance outside the noise kernel. The theory has been tested with MSCI North America, Europe and Pacific total return stock indices.

  9. Using Electronic Portfolios

    ERIC Educational Resources Information Center

    Page, Deb

    2012-01-01

    The digitized collections of artifacts known as electronic portfolios are creating solutions to a variety of performance improvement needs in ways that are cost-effective and improve both individual and group learning and performance. When social media functionality is embedded in e-portfolios, the tools support collaboration, social learning,…

  10. Portfolio Based Management

    ERIC Educational Resources Information Center

    Daigneau, William A.

    2010-01-01

    In this article, the author talks about Portfolio Management, a concept used to make allocation decisions in the world of financial investments. While much has been written about Portfolio theory, and the term is widely used in the facilities management industry, little is really understood about the concept and its real-world application. The…

  11. E-Portfolios

    ERIC Educational Resources Information Center

    Driscoll, Kelly

    2007-01-01

    E-portfolios are online spaces for teachers and students to communicate, share, reflect, and collaborate inside and outside of the classroom. They have created exciting opportunities for teaching and learning worldwide. This article discusses three key factors to the popularity and wide adoption of e-portfolios: easy access, low cost, and high…

  12. Portfolios in professional practice.

    PubMed

    Storey, Les; Haigh, Carol

    2002-03-01

    Competency-based approaches to education and professional development have increased the need for nursing practitioners to submit their clinical practice to scrutiny through the development and assessment of portfolios. This paper examines the role of portfolio development as a method of assessing competency in and for practice and provides a brief synopsis of opposing views in relation to competency-based approaches.

  13. Students' reflections in a portfolio pilot: highlighting professional issues.

    PubMed

    Haffling, Ann-Christin; Beckman, Anders; Pahlmblad, Annika; Edgren, Gudrun

    2010-01-01

    Portfolios are highlighted as potential assessment tools for professional competence. Although students' self-reflections are considered to be central in the portfolio, the content of reflections in practice-based portfolios is seldom analysed. To investigate whether students' reflections include sufficient dimensions of professional competence, notwithstanding a standardized portfolio format, and to evaluate students' satisfaction with the portfolio. Thirty-five voluntary final-year medical students piloted a standardized portfolio in a general practice (GP) attachment at Lund University, Sweden. Students' portfolio reflections were based upon documentary evidence from practice, and aimed to demonstrate students' learning. The reflections were qualitatively analysed, using a framework approach. Students' evaluations of the portfolio were subjected to quantitative and qualitative analysis. Among professional issues, an integration of cognitive, affective and practical dimensions in clinical practice was provided by students' reflections. The findings suggested an emphasis on affective issues, particularly on self-awareness of feelings, attitudes and concerns. In addition, ethical problems, clinical reasoning strategies and future communication skills training were subjects of several reflective commentaries. Students' reflections on their consultation skills demonstrated their endeavour to achieve structure in the medical interview by negotiation of an agenda for the consultation, keeping the interview on track, and using internal summarizing. The importance of active listening and exploration of patient's perspective was also emphasized. In students' case summaries, illustrating characteristic attributes of GP, the dominating theme was 'patient-centred care', including the patient-doctor relationship, holistic modelling and longitudinal continuity. Students were satisfied with the portfolio, but improved instructions were needed. A standardized portfolio in a

  14. Successful Use of Teaching Portfolios.

    ERIC Educational Resources Information Center

    Seldin, Peter; And Others

    This book offers information on fostering effective use of teaching portfolios by college faculty. The first chapter, "The Teaching Portfolio Concept" (Peter Seldin), discusses how the teaching portfolio concept differs from other evaluation approaches, what is and is not included in a portfolio, and why the content depends on the purpose of the…

  15. Electronic Portfolios Enhance Health Instruction.

    ERIC Educational Resources Information Center

    Journal of School Health, 1999

    1999-01-01

    School health educators encourage the use of portfolios to demonstrate student learning. Electronic portfolios can solve problems inherent in traditional portfolios, reducing storage space and allowing video, audio, and interactive components to be included in documenting student growth. This paper describes benefits of electronic portfolios,…

  16. Using Portfolios in Higher Education.

    ERIC Educational Resources Information Center

    Ediger, Marlow

    One constructivist approach to assessing student learning is the use of portfolios. The contents of a portfolio demonstrate what a student knows and can do. The portfolio indicates actual products and processes a student has developed, as exemplified in the description of the contents of a student portfolio in a teaching methods course. Portfolios…

  17. Electronic Portfolios Enhance Health Instruction.

    ERIC Educational Resources Information Center

    Journal of School Health, 1999

    1999-01-01

    School health educators encourage the use of portfolios to demonstrate student learning. Electronic portfolios can solve problems inherent in traditional portfolios, reducing storage space and allowing video, audio, and interactive components to be included in documenting student growth. This paper describes benefits of electronic portfolios,…

  18. Large deviations and portfolio optimization

    NASA Astrophysics Data System (ADS)

    Sornette, Didier

    Risk control and optimal diversification constitute a major focus in the finance and insurance industries as well as, more or less consciously, in our everyday life. We present a discussion of the characterization of risks and of the optimization of portfolios that starts from a simple illustrative model and ends by a general functional integral formulation. A major item is that risk, usually thought of as one-dimensional in the conventional mean-variance approach, has to be addressed by the full distribution of losses. Furthermore, the time-horizon of the investment is shown to play a major role. We show the importance of accounting for large fluctuations and use the theory of Cramér for large deviations in this context. We first treat a simple model with a single risky asset that exemplifies the distinction between the average return and the typical return and the role of large deviations in multiplicative processes, and the different optimal strategies for the investors depending on their size. We then analyze the case of assets whose price variations are distributed according to exponential laws, a situation that is found to describe daily price variations reasonably well. Several portfolio optimization strategies are presented that aim at controlling large risks. We end by extending the standard mean-variance portfolio optimization theory, first within the quasi-Gaussian approximation and then using a general formulation for non-Gaussian correlated assets in terms of the formalism of functional integrals developed in the field theory of critical phenomena.

  19. Teaching portfolios: documenting teaching.

    PubMed

    Regan-Smith, M G

    1998-01-01

    In recent years, teaching portfolios have been developed as a way teachers can document teaching scholarship and demonstrate their teaching accomplishments, skills, and strategies. Most medical schools reward good teaching, often with promotion on clinician-teacher tracks, thereby acknowledging the contributions made by clinical faculty who serve the academic mission as teachers. Teaching portfolios provide a means for teachers to demonstrate their teaching achievements and display their best work. This article gives recommendations for constructing a teaching portfolio and includes examples of what can be included.

  20. Emissions of greenhouse gases, ammonia, and hydrogen sulfide from pigs fed standard diets and diets supplemented with dried distillers grains with solubles.

    PubMed

    Trabue, Steven; Kerr, Brian

    2014-07-01

    Swine producers are supplementing animal diets with increased levels of dried distillers grains with solubles (DDGS) to offset the cost of a standard corn-soybean meal (CSBM) diet. However, the environmental impact of these diets on emissions of greenhouse gases, ammonia (NH), and hydrogen sulfide (HS) is largely unknown. Twenty-four pigs (103.6 kg initial body weight) were fed a standard CSBM diet or a CSBM diet containing 35% DDGS for 42 d. Pigs were fed and their manure was collected twice daily over the 42-d trial. Pigs fed diets containing DDGS had reduced manure pH ( < 0.01), increased surface crust coverage ( < 0.01), increased manure dry matter content ( < 0.01), and increased manure C ( < 0.01), N ( < 0.01), and S ( < 0.01) contents. Animals fed DDGS diets also had significantly higher concentrations of total ammoniacal nitrogen ( < 0.01) and sulfide ( < 0.01) in their manure compared with animals fed CSBM diets. Manure emissions of NH ( < 0.01) and HS ( < 0.05) were significantly higher in animals fed the CSBM diet. There was no dietary treatment effect for methane or nitrous oxide emissions from manure. This study demonstrates that diets containing DDGS can significantly affect manure composition and potentially lower emissions of NH and HS. Copyright © by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc.

  1. Portfolio Analysis Tool

    NASA Technical Reports Server (NTRS)

    Barth, Tim; Zapata, Edgar; Benjamin, Perakath; Graul, Mike; Jones, Doug

    2005-01-01

    Portfolio Analysis Tool (PAT) is a Web-based, client/server computer program that helps managers of multiple projects funded by different customers to make decisions regarding investments in those projects. PAT facilitates analysis on a macroscopic level, without distraction by parochial concerns or tactical details of individual projects, so that managers decisions can reflect the broad strategy of their organization. PAT is accessible via almost any Web-browser software. Experts in specific projects can contribute to a broad database that managers can use in analyzing the costs and benefits of all projects, but do not have access for modifying criteria for analyzing projects: access for modifying criteria is limited to managers according to levels of administrative privilege. PAT affords flexibility for modifying criteria for particular "focus areas" so as to enable standardization of criteria among similar projects, thereby making it possible to improve assessments without need to rewrite computer code or to rehire experts, and thereby further reducing the cost of maintaining and upgrading computer code. Information in the PAT database and results of PAT analyses can be incorporated into a variety of ready-made or customizable tabular or graphical displays.

  2. Robust Active Portfolio Management

    DTIC Science & Technology

    2006-11-27

    the Markowitz mean-variance model led to development of the Capital Asset Pricing Model ( CAPM ) for asset pricing [35, 29, 23] which remains one of the...active portfolio management. Our model uses historical returns and equilibrium expected returns predicted by the CAPM to identify assets that are...we construct robust models for active portfolio management in a market with transaction costs. The goal of these robust models is to control the impact

  3. Portfolio Assessment: Making Connections, Guiding Change

    ERIC Educational Resources Information Center

    King, Caryn M.; Patterson, Nancy G.; Stolle, Elizabeth Petroelje

    2008-01-01

    Three literacy teacher-educators chart the ways in which portfolio assessment impacted their program. They discuss the tension between the demands of national accreditation standards and faculty belief systems in more ecological approaches. They describe the processes of change that occurred programmatically and individually which continue to…

  4. Promise and Practice of Professional Portfolios.

    ERIC Educational Resources Information Center

    Willis, Elizabeth M.; Davies, Mary Ann

    2002-01-01

    Surveyed preservice elementary teachers regarding their perceptions of the impact of portfolios on professional development and the transition from school to work. Results indicated that the process promoted reflective practice, increased self-confidence, prepared respondents for the job search, and heightened awareness of professional standards.…

  5. Teacher Candidate Perceptions of Electronic Portfolios

    ERIC Educational Resources Information Center

    Baronak, William M.

    2011-01-01

    Today, many students in higher education are considered digital natives--savvier and more experienced with technology than students in the past. In teacher preparation programs, teacher education students are commonly expected to demonstrate achievement of program goals and objectives and national teaching standards in a "portfolio." Gaining in…

  6. Teacher Candidate Perceptions of Electronic Portfolios

    ERIC Educational Resources Information Center

    Baronak, William M.

    2011-01-01

    Today, many students in higher education are considered digital natives--savvier and more experienced with technology than students in the past. In teacher preparation programs, teacher education students are commonly expected to demonstrate achievement of program goals and objectives and national teaching standards in a "portfolio." Gaining in…

  7. Feebates and Fuel Economy Standards: Impacts on Fuel Use in Light-Duty Vehicles and Greenhouse Gas Emissions

    SciTech Connect

    Greene, David L

    2011-01-01

    This study evaluates the potential impacts of a national feebate system, a market-based policy that consists of graduated fees on low-fuel-economy (or high-emitting) vehicles and rebates for high-fuel-economy (or lowemitting) vehicles. In their simplest form, feebate systems operate under three conditions: a benchmark divides all vehicles into two categories-those charged fees and those eligible for rebates; the sizes of the fees and rebates are a function of a vehicle's deviation from its benchmark; and placement of the benchmark ensures revenue neutrality or a desired level of subsidy or revenue. A model developed by the University of California for the California Air Resources Board was revised and used to estimate the effects of six feebate structures on fuel economy and sales of new light-duty vehicles, given existing and anticipated future fuel economy and emission standards. These estimates for new vehicles were then entered into a vehicle stock model that simulated the evolution of the entire vehicle stock. The results indicate that feebates could produce large, additional reductions in emissions and fuel consumption, in large part by encouraging market acceptance of technologies with advanced fuel economy, such as hybrid electric vehicles.

  8. Greenhouse Gases

    MedlinePlus

    ... U.S. and international estimates of greenhouse gas emissions: Carbon dioxide (CO2) Methane (CH4) Nitrous oxide (N2O) Industrial ... From Outlook for Future Emissions FAQs How much carbon dioxide is produced when different fuels are burned? — ...

  9. Decomposing Fuel Economy and Greenhouse Gas Regulatory Standards in the Energy Conversion Efficiency and Tractive Energy Domain

    SciTech Connect

    Pannone, Greg; Thomas, John F; Reale, Michael; Betz, Brian

    2017-01-01

    The three foundational elements that determine mobile source energy use and tailpipe carbon dioxide (CO2) emissions are the tractive energy requirements of the vehicle, the on-cycle energy conversion efficiency of the propulsion system, and the energy source. The tractive energy requirements are determined by the vehicle's mass, aerodynamic drag, tire rolling resistance, and parasitic drag. Oncycle energy conversion of the propulsion system is dictated by the tractive efficiency, non-tractive energy use, kinetic energy recovery, and parasitic losses. The energy source determines the mobile source CO2 emissions. For current vehicles, tractive energy requirements and overall energy conversion efficiency are readily available from the decomposition of test data. For future applications, plausible levels of mass reduction, aerodynamic drag improvements, and tire rolling resistance can be transposed into the tractive energy domain. Similarly, by combining thermodynamic, mechanical efficiency, and kinetic energy recovery fundamentals with logical proxies, achievable levels of energy conversion efficiency can be established to allow for the evaluation of future powertrain requirements. Combining the plausible levels of tractive energy and on-cycle efficiency provides a means to compute sustainable vehicle and propulsion system scenarios that can achieve future regulations. Using these principles, the regulations established in the United States (U.S.) for fuel consumption and CO2 emissions are evaluated. Fleet-level scenarios are generated and compared to the technology deployment assumptions made during rule-making. When compared to the rule-making assumptions, the results indicate that a greater level of advanced vehicle and propulsion system technology deployment will be required to achieve the model year 2025 U.S. standards for fuel economy and CO2 emissions.

  10. To Portfolio or Not to Portfolio: Helpful or Hyped?

    ERIC Educational Resources Information Center

    Lombardi, Judy

    2008-01-01

    Portfolios have received mixed but primarily positive reviews in colleges and universities. The portfolio offers a tool of authentic assessment as well as an opportunity for students to be reflective practitioners. Portfolio implementation and evaluation has become a feature of many university departments. The author describes different approaches…

  11. Preparedness Portfolios and Portfolio Studios: Supporting Self-Authoring Engineers

    ERIC Educational Resources Information Center

    Sattler, Brook; Turns, Jennifer

    2015-01-01

    In this work, we engaged engineering undergraduate students in constructing an ePortfolio. The purpose of the research presented here was to explore the question, "If and in what ways do students report experiencing the construction of a preparedness portfolio in a portfolio studio as an opportunity to develop into self-authoring…

  12. To Portfolio or Not to Portfolio: Helpful or Hyped?

    ERIC Educational Resources Information Center

    Lombardi, Judy

    2008-01-01

    Portfolios have received mixed but primarily positive reviews in colleges and universities. The portfolio offers a tool of authentic assessment as well as an opportunity for students to be reflective practitioners. Portfolio implementation and evaluation has become a feature of many university departments. The author describes different approaches…

  13. MEDIA ADVISORY: EPA, NHTSA Hold Public Hearing on Proposed Phase 2 Greenhouse Gas Standards for Medium- and Heavy-Duty Trucks

    EPA Pesticide Factsheets

    (Long Beach) --- On Tuesday, August 18th, EPA and the National Highway Traffic Safety Administration (NHTSA)will hold a national public hearing in Long Beach, California, to receive comments on their joint proposed rules, ''Greenhouse Gas Emissions and Fue

  14. Student Reflection in Portfolio Assessment.

    ERIC Educational Resources Information Center

    Wolfe, Edward W.

    This paper reports the results of a large-scale portfolio pilot in which over 2,000 secondary students submitted portfolios in language arts, mathematics, and science classes. Students were asked to select work for their portfolios based on the criteria that would be used to evaluate the work. Students also reflected on how their work satisfied…

  15. Portfolio Assessment and Quality Teaching

    ERIC Educational Resources Information Center

    Kim, Youb; Yazdian, Lisa Sensale

    2014-01-01

    Our article focuses on using portfolio assessment to craft quality teaching. Extant research literature on portfolio assessment suggests that the primary purpose of assessment is to serve learning, and portfolio assessments facilitate the process of making linkages among assessment, curriculum, and student learning (Asp, 2000; Bergeron, Wermuth,…

  16. Portfolio Preparation Tips for Teachers

    ERIC Educational Resources Information Center

    Hunter-Lombardi, Brooke

    2008-01-01

    As college deadlines loom, teachers may wonder if there is a magic portfolio formula for their students to follow. After twenty years of thought on portfolio development and the opportunity to review over 10,000 individual portfolios, the author is convinced that there is no single formula for success. With hard work, careful planning, and…

  17. Speaking of Portfolios: Contrasting Images.

    ERIC Educational Resources Information Center

    Parker, Elaine F.

    Since the first definitive references to portfolio evaluation in assessment literature, metaphors have been significant in shaping students' and teachers' understanding of the role of the portfolio in the writing classroom. Consider the range of metaphors employed in discussions about portfolios. Margie Krest, for instance, emphasizes the social…

  18. Portfolio Analysis for Vector Calculus

    ERIC Educational Resources Information Center

    Kaplan, Samuel R.

    2015-01-01

    Classic stock portfolio analysis provides an applied context for Lagrange multipliers that undergraduate students appreciate. Although modern methods of portfolio analysis are beyond the scope of vector calculus, classic methods reinforce the utility of this material. This paper discusses how to introduce classic stock portfolio analysis in a…

  19. Digital Portfolios: Fact or Fashion?

    ERIC Educational Resources Information Center

    Woodward, Helen; Nanlohy, Phil

    2004-01-01

    The value of portfolios as an assessment tool is thoroughly researched and their use in education is well documented ( Woodward, 2000). Research on the introduction of digital portfolios is substantially based on general portfolio research; however, additional specific factors and features need to be considered. One of the inherent dangers with…

  20. Portfolio Assessment of Instructional Technology.

    ERIC Educational Resources Information Center

    Carlson, Randal D.

    1999-01-01

    Addresses one specific method of authentic assessment, portfolio assessment, by applying this method in two case studies assessing learning of instructional technology. Explains the differences between process portfolios and product portfolios, explains scoring rubrics, and provides suggestions for practitioners. (Author/LRW)

  1. The High-Tech Portfolio.

    ERIC Educational Resources Information Center

    Bushweller, Kevin

    1995-01-01

    Describes a rural Vermont K-12 school's experimentation with electronic portfolio assessment. Although electronic portfolios are clearly superior to paper portfolios in evaluating young readers, problems can arise concerning assessment reliability, missing files, student forgetfulness, passwords, and crashed systems. Teachers value this technology…

  2. Portfolio Assessment and Quality Teaching

    ERIC Educational Resources Information Center

    Kim, Youb; Yazdian, Lisa Sensale

    2014-01-01

    Our article focuses on using portfolio assessment to craft quality teaching. Extant research literature on portfolio assessment suggests that the primary purpose of assessment is to serve learning, and portfolio assessments facilitate the process of making linkages among assessment, curriculum, and student learning (Asp, 2000; Bergeron, Wermuth,…

  3. Electronic Portfolios. [SITE 2001 Section].

    ERIC Educational Resources Information Center

    Willis, Dee Anna, Ed.

    This document contains the following papers on electronic portfolios from the SITE (Society for Information Technology & Teacher Education) 2001 conference: (1) "Portfolios: The Plan, the Purpose, a Preview" (Val Christensen and others); (2) "Electronic Portfolios (EP): A How To Guide" (Jerry P. Galloway); (3)…

  4. Using Portfolios across the Curriculum.

    ERIC Educational Resources Information Center

    Lockledge, Ann, Ed.; Hayn, Judith, Ed.

    Noting that many middle school teachers are challenged to use portfolio assessment in the midst of their other daily responsibilities and mandated activities, this monograph demonstrates how portfolio assessment can contribute to student learning, shows how teachers use portfolio assessment in their classrooms, discusses students' views of…

  5. Portfolio Analysis for Vector Calculus

    ERIC Educational Resources Information Center

    Kaplan, Samuel R.

    2015-01-01

    Classic stock portfolio analysis provides an applied context for Lagrange multipliers that undergraduate students appreciate. Although modern methods of portfolio analysis are beyond the scope of vector calculus, classic methods reinforce the utility of this material. This paper discusses how to introduce classic stock portfolio analysis in a…

  6. Portfolio on a Shoestring

    NASA Astrophysics Data System (ADS)

    Mitchell, S. E.; Barbier, S. B.; Krishnamurthi, A.; Lochner, J. C.

    2008-06-01

    Many education and outreach programs face two daunting shortages: time and money. EPO professionals are frequently challenged to develop quality efforts for a variety of audiences and settings, all on a shoestring budget. How do you create a broad and cohesive education and outreach portfolio with limited resources? In this session, we discussed several effective strategies to make the most of your assets, such as adaptation of existing programs and materials, mutually beneficial partnerships, and innovative (and inexpensive) dissemination techniques. These approaches can fill in the gaps in your portfolio, increasing the scope and impact of your EPO efforts. There are a variety of cost-effective tools and techniques that can bring your EPO endeavors to a wide range of audiences and settings. Turn your program's EPO wish list into reality through savvy leveraging of existing personnel, funding, and materials... or find a partner that can help you fill any gaps in your portfolio.

  7. The nursing portfolio: a reflection of a professional.

    PubMed

    Alexander, Janet G; Craft, Sandra W; Baldwin, Mary Sue; Beers, Geri W; McDaniel, Gretchen S

    2002-01-01

    A nursing portfolio is a means of documenting skills such as communication, creativity, and critical thinking. More important, it reflects professional development, self-evaluation, and achievement of goals. Designing and implementing a portfolio enables traditional nursing students and RNs returning to school to describe their achievements during a specified period of time. For the adult student seeking scholastic or clinical credit for past work or life experiences, the portfolio provides a creative and structured way for this to be obtained without taking a standardized test.

  8. Sparse and stable Markowitz portfolios.

    PubMed

    Brodie, Joshua; Daubechies, Ingrid; De Mol, Christine; Giannone, Domenico; Loris, Ignace

    2009-07-28

    We consider the problem of portfolio selection within the classical Markowitz mean-variance framework, reformulated as a constrained least-squares regression problem. We propose to add to the objective function a penalty proportional to the sum of the absolute values of the portfolio weights. This penalty regularizes (stabilizes) the optimization problem, encourages sparse portfolios (i.e., portfolios with only few active positions), and allows accounting for transaction costs. Our approach recovers as special cases the no-short-positions portfolios, but does allow for short positions in limited number. We implement this methodology on two benchmark data sets constructed by Fama and French. Using only a modest amount of training data, we construct portfolios whose out-of-sample performance, as measured by Sharpe ratio, is consistently and significantly better than that of the naïve evenly weighted portfolio.

  9. Sparse and stable Markowitz portfolios

    PubMed Central

    Brodie, Joshua; Daubechies, Ingrid; De Mol, Christine; Giannone, Domenico; Loris, Ignace

    2009-01-01

    We consider the problem of portfolio selection within the classical Markowitz mean-variance framework, reformulated as a constrained least-squares regression problem. We propose to add to the objective function a penalty proportional to the sum of the absolute values of the portfolio weights. This penalty regularizes (stabilizes) the optimization problem, encourages sparse portfolios (i.e., portfolios with only few active positions), and allows accounting for transaction costs. Our approach recovers as special cases the no-short-positions portfolios, but does allow for short positions in limited number. We implement this methodology on two benchmark data sets constructed by Fama and French. Using only a modest amount of training data, we construct portfolios whose out-of-sample performance, as measured by Sharpe ratio, is consistently and significantly better than that of the naïve evenly weighted portfolio. PMID:19617537

  10. Who Is a Teacher Educator? Enactment of Teacher Educator Identity through Electronic Portfolio Development

    ERIC Educational Resources Information Center

    Klecka, Cari L.; Donovan, Loretta; Venditti, Karen J.; Short, Barbara

    2008-01-01

    This study examines how participants in the Teacher Educator Standards Cohort enacted their identities through the creation of standards-based portfolios. Fourteen teacher educators participated in the cohort for 1 year. Data sources included the electronic portfolios, focus group interviews, and individual reflections. Findings point to five…

  11. In Their Shoes: Teacher Educators' Reframing Portfolio Development from the Students' Perspective

    ERIC Educational Resources Information Center

    Klecka, Cari; Donovan, Loretta; Fisher, Robert L.

    2007-01-01

    This article examines 14 teacher educators' development of standards-based electronic portfolios. The research focused on the participants' interpretation of the standards and how they conceptualized the portfolio development process in relation to their professional practice. For one year, participants interacted around the Association of Teacher…

  12. SOARD Research Portfolio

    DTIC Science & Technology

    2013-03-05

    Briefing Contents • Space Science Portfolio – Solar, Ionosphere, Magnetosphere (Kent Miller (AFOSR), RV) • Molecular Physics – Isotope Decay... Magnetospheric Physics – Ionospheric and Thermospheric Physics • Necessary for: – Satellite drag predictions – Radiation belt perturbations...Luis during the AFRL/INPE campaign (installation on February 2008) Cooperation in Atmospheric, Ionospheric and Magnetospheric Research MOU

  13. The Employability Skills Portfolio.

    ERIC Educational Resources Information Center

    Stemmer, Paul; And Others

    1992-01-01

    During 1990-91, Michigan schools piloted an innovative portfolio approach enabling students to discover, document, and develop employability skills in academics, personal management, and teamwork. Not an improved sorting system, the project encourages students to recognize successes, seek opportunities to improve skills, and gain confidence in…

  14. Portfolios: Authentic Assessment.

    ERIC Educational Resources Information Center

    Borowski, Maureen Coursey; Thompson, Carol; Zaccaria, Karen

    This report describes a plan for using student portfolios as a tool for authentic assessment. The targeted population was classes of 5th, 8th, and 12th graders in 3 urban school settings. The three teachers involved felt that current assessment methods were inadequate for measuring student learning. Analysis of the data showed that current…

  15. Learning and Digital Portfolios

    ERIC Educational Resources Information Center

    Moran, Wendy; Vozzo, Les; Reid, Jo-Anne; Pietsch, Marilyn; Hatton, Caroline

    2013-01-01

    Utilising appropriate Information Communication Technologies (ICT) as instructional tools in teacher education can be a challenging yet worthwhile endeavour. This paper reports the difficulties and benefits of a recent inter-university project requiring preservice primary teachers to construct professional digital portfolios using the support of…

  16. Student Portfolios 101

    ERIC Educational Resources Information Center

    Lippert, Robert

    2004-01-01

    Student portfolios can offer great benefits to both high school and postsecondary education programs. They assist instructors in determining the progress of a student's performance and provide students with a vital self-promotion tool for job searches or the higher education application process. This brief article describes a few considerations to…

  17. Portfolio Assessment: A Model for Counselor Education.

    ERIC Educational Resources Information Center

    Baltimore, Michael L.; And Others

    1996-01-01

    Discusses the benefits of portfolio assessment to counselor education programs. Provides a definition of portfolio and outlines a portfolio approach in counselor education. Asserts that portfolio assessment relies on performance in measuring learning outcomes. Gives an example of portfolio content, along with strategies for evaluating student…

  18. Emissions of greenhouse gases, ammonia, and hydrogen sulfide from pigs fed standard diets and diets supplemented with dried distillers grains with solubles

    USDA-ARS?s Scientific Manuscript database

    Swine growers are increasingly supplementing animal diets with dried distillers grains soluble (DDGS) to offset cost of a typical corn-soybean meal diet. An experiment was conducted to investigate the effects of DDGS diets on both on manure composition and emissions of greenhouse gases (GHG), ammoni...

  19. Portfolios Help Parents Appreciate Advisory Time.

    ERIC Educational Resources Information Center

    Parker, James R.

    1999-01-01

    Discusses the implementation of student portfolios to inform parents of the value of teacher advisory time for their middle school students. Considers the need for portfolios, the process of building the portfolio, and eliciting feedback from parents. (JPB)

  20. Portfolios Help Parents Appreciate Advisory Time.

    ERIC Educational Resources Information Center

    Parker, James R.

    1999-01-01

    Discusses the implementation of student portfolios to inform parents of the value of teacher advisory time for their middle school students. Considers the need for portfolios, the process of building the portfolio, and eliciting feedback from parents. (JPB)

  1. An unbalanced portfolio.

    PubMed

    Federsel, Hans-Jurgen

    2009-06-01

    An excellent demonstration of how meaningful and valuable conferences devoted to the topic of project and portfolio management in the pharmaceutical industry can be, was given at an event organized in Barcelona, September 2008. Thus, over this 2-day meeting the delegates were updated on the state of the art in this wide-reaching area from speakers representing an array of companies; from small, relatively new players, via mid-sized, to established large and big pharmas. One common theme that emerged was the importance of assessing the value of drug projects as correctly as possible, especially under the current financial climate and the many challenges facing the industry. Furthermore, experiences from constructing portfolios with the aim to minimize risk and maximize return on investment were shared alongside mathematical approaches to obtain the data required for this purpose and accounts of the pleasures and hardships working in a global context and in partnership constellations.

  2. On portfolio risk diversification

    NASA Astrophysics Data System (ADS)

    Takada, Hellinton H.; Stern, Julio M.

    2017-06-01

    The first portfolio risk diversification strategy was put into practice by the All Weather fund in 1996. The idea of risk diversification is related to the risk contribution of each available asset class or investment factor to the total portfolio risk. The maximum diversification or the risk parity allocation is achieved when the set of risk contributions is given by a uniform distribution. Meucci (2009) introduced the maximization of the Rényi entropy as part of a leverage constrained optimization problem to achieve such diversified risk contributions when dealing with uncorrelated investment factors. A generalization of the risk parity is the risk budgeting when there is a prior for the distribution of the risk contributions. Our contribution is the generalization of the existent optimization frameworks to be able to solve the risk budgeting problem. In addition, our framework does not possess any leverage constraint.

  3. Do portfolios have a future?

    PubMed

    Driessen, Erik

    2017-03-01

    While portfolios have seen an unprecedented surge in popularity, they have also become the subject of controversy: learners often perceive little gain from writing reflections as part of their portfolios; scholars question the ethics of such obligatory reflection; and students, residents, teachers and scholars alike condemn the bureaucracy surrounding portfolio implementation in competency-based education. It could be argued that mass adoption without careful attention to purpose and format may well jeopardize portfolios' viability in health sciences education. This paper explores this proposition by addressing the following three main questions: (1) Why do portfolios meet with such resistance from students and teachers, while educators love them?; (2) Is it ethical to require students to reflect and then grade their reflections?; (3) Does competency-based education empower or hamper the learner during workplace-based learning? Twenty-five years of portfolio reveal a clear story: without mentoring, portfolios have no future and are nothing short of bureaucratic hurdles in our competency-based education programs. Moreover, comprehensive portfolios, which are integrated into the curriculum and much more diverse in content than reflective portfolios, can serve as meaningful patient charts, providing doctor and patient with useful information to discuss well-being and treatment. In this sense, portfolios are also learner charts that comprehensively document progress in a learning trajectory which is lubricated by meaningful dialogue between learner and mentor in a trusting relationship to foster learning. If we are able to make such comprehensive and meaningful use of portfolios, then, yes, portfolios do have a bright future in medical education.

  4. Impact of policy on greenhouse gas emissions and economics of biodiesel production.

    PubMed

    Olivetti, Elsa; Gülşen, Ece; Malça, João; Castanheira, Erica; Freire, Fausto; Dias, Luis; Kirchain, Randolph

    2014-07-01

    As an alternative transportation fuel to petrodiesel, biodiesel has been promoted within national energy portfolio targets across the world. Early estimations of low lifecycle greenhouse gas (GHG) emissions of biodiesel were a driver behind extensive government support in the form of financial incentives for the industry. However, studies consistently report a high degree of uncertainty in these emissions estimates, raising questions concerning the carbon benefits of biodiesel. Furthermore, the implications of feedstock blending on GHG emissions uncertainty have not been explicitly addressed despite broad practice by the industry to meet fuel quality standards and to control costs. This work investigated the impact of feedstock blending on the characteristics of biodiesel by using a chance-constrained (CC) blend optimization method. The objective of the optimization is minimization of feedstock costs subject to fuel standards and emissions constraints. Results indicate that blending can be used to manage GHG emissions uncertainty characteristics of biodiesel, and to achieve cost reductions through feedstock diversification. Simulations suggest that emissions control policies that restrict the use of certain feedstocks based on their GHG estimates overlook blending practices and benefits, increasing the cost of biodiesel. In contrast, emissions control policies which recognize the multifeedstock nature of biodiesel provide producers with feedstock selection flexibility, enabling them to manage their blend portfolios cost effectively, potentially without compromising fuel quality or emissions reductions.

  5. Midwestern Greenhouse Gas Reduction Accord

    SciTech Connect

    2007-07-01

    The Midwestern Greenhouse Gas Reduction Acccord, or Midwestern Greenhouse gas Accord (MGA), is a regional agreement by governors of the states in the US Midwest and one Canadian province to reduce greenhouse gas emissions to combat climate change. Signatories to the accord include the US states of Minnesota, Wisconsin, Illinois, Indiana, Iowa, Michigan, Kansas, Ohio and South Dakota, and the Canadian Province of Manitoba. The accord, signed on November 15, 2007, established the Midwestern Greenhouse Gas Reduction Program, which aims to: establish greenhouse gas reduction targets and timeframes consistent with MGA member states' targets; develop a market-based and multi-sector cap-and-trade mechanism to help achieve those reduction targets; establish a system to enable tracking, management, and crediting for entities that reduce greenhouse gas emissions; and develop and implement additional steps as needed to achieve the reduction targets, such as a low-carbon fuel standards and regional incentives and funding mechanisms. The GHG registry will be managed by the Climate Registry, which manages the registry for other US state schemes. One of the first actions was to convene an Energy Security under Climate Stewardship Platform to guide future development of the Midwest's energy economy.

  6. Electronic Teaching Portfolios: Technology Skills + Portfolio Development = Powerful Preservice Teachers.

    ERIC Educational Resources Information Center

    Capraro, Mary Margaret

    An electronic portfolio is a collection of work captured by electronic means that serves as an exhibit of individual efforts, progress, and achievements in one or more areas. Due to rapid growth and updates in technology, keeping electronic portfolios is becoming increasingly common in a variety of educational settings. In fall 2002 at one large…

  7. The Portfolio Organizer: Succeeding with Portfolios in Your Classroom.

    ERIC Educational Resources Information Center

    Rolheiser, Carol; Bower, Barbara; Stevahn, Laurie

    This book provides educators with a flexible framework to guide decision making for effective and efficient use of portfolios in classrooms and schools. It targets major categories of decision making, as reflected in the first 10 chapters: (1) "Determining the Basics of Student Portfolios"; (2) "Selecting Categories for Entries"; (3) "Identifying…

  8. Whose Portfolio Is It Anyway? Dilemmas of Professional Portfolio Building.

    ERIC Educational Resources Information Center

    Ruskin-Mayher, Sue

    1999-01-01

    Examines use of portfolios as a major assessment tool for students in the field of English Education. Discusses how professional portfolios encourage students to use their meta-cognitive skills and find their own unique themes as well as encouraging teachers to become collaborators and co-creators with students. Describes advantages and…

  9. Applying Financial Portfolio Analysis to Government Program Portfolios

    DTIC Science & Technology

    2007-06-01

    instance, in stock valuation, the Capital Asset Pricing Model ( CAPM ) often provides the returns used in portfolio theory analysis. Further...PORTFOLIO OPTIMIZATION MODELS ................................... 63 1. EVM Optimization Model ...63 2. Constrained EVM Optimization Model ................................. 64 IV. DATA ANALYSIS AND RESULTS

  10. Is our student portfolio valued?

    PubMed

    Dolan, Gina; Fairbairn, Gavin; Harris, Sue

    2004-01-01

    A student portfolio was introduced for pre-registration nursing students at the University of Glamorgan in October 1997. The impetus for doing so was the recognised need to address:the 'theory-practice' divide;the need to provide nurse students with skills that will enable them to maintain the Professional Profile for registration purposes (). This article reports a research study evaluating the student portfolio. The main objectives of the evaluation were to investigate whether the portfolio addressed the perceived needs and to identify if students were experiencing potential benefits by using the portfolio. Semi-structured interviews and focus groups were conducted with students and staff about their usage and perceptions of the portfolio. These findings were used to inform the design of the questionnaire to investigate students' experiences of using the portfolio, and their views about its usefulness. The questionnaires (n=219) confirmed the impression that students are not making frequent use of the portfolio. Students mainly discussed sections relating to academic aspects of the course. The summative assessment (essays) section was discussed by the greatest proportion of students (51% n=108). More students (74%) felt that too little time was spent on the portfolio than any other aspect of the course. Although many students and staff appreciate the potential value of using the portfolio, it is not a requirement of the course and so tends not to be treated as a high priority. Many of the recommendations from this study focussed on ways of integrating the portfolio into the course in order to increase its use. The results of this study have informed the development of an All Wales Student Portfolio introduced in April 2002 (Welsh Assembly Government, 2002).

  11. Gardening with Greenhouses

    ERIC Educational Resources Information Center

    Keeler, Rusty

    2010-01-01

    Greenhouses come in all shapes, sizes, and price ranges: from simple hand-built plastic-covered frames to dazzling geodesic domes. Some child care centers install greenhouses as a part of their outdoor garden space. Other centers have incorporated a greenhouse into the building itself. Greenhouses provide a great opportunity for children to grow…

  12. Gardening with Greenhouses

    ERIC Educational Resources Information Center

    Keeler, Rusty

    2010-01-01

    Greenhouses come in all shapes, sizes, and price ranges: from simple hand-built plastic-covered frames to dazzling geodesic domes. Some child care centers install greenhouses as a part of their outdoor garden space. Other centers have incorporated a greenhouse into the building itself. Greenhouses provide a great opportunity for children to grow…

  13. Use of Portfolios for Assessment of Resident Teaching Skills

    PubMed Central

    Donato, Anthony A.; Harris, Ilene

    2013-01-01

    Background Portfolios are effective instruments for assessment of teaching skills among professional teachers and have recently been adapted in medical education. However, scoring rubrics are needed to effectively guide assessors. Intervention Portfolio assessors reviewed and made assessment comments about the resident-as-teacher sections of 11 internal medicine residents' electronic portfolios and discussed their assessments in an assessor group discussion. We performed qualitative analyses of written and oral comments. Major themes were identified, and member checking and triangulation with the literature was performed to evaluate the trustworthiness of the qualitative analysis. Results Three faculty educators reviewed and commented on 241 uploaded e-portfolio documents accompanying reflections. Three major themes were identified: Application of Teaching Skills, Presentation Skills, and Insights as a Teacher. Themes and subthemes matched closely to several components of the conceptual framework of effective presentations formulated in Glassick standards for scholarly work, as well as themes found in assessments of professional teachers' portfolios. Conclusions Assessments of portfolios by experienced faculty educators appear to be useful for identifying many important facets of formal teaching presentations and may be useful for creation of a scoring rubric. PMID:24404313

  14. Portfolio Development and the Assessment of Prior Learning: Perspectives, Models and Practices. Second Edition

    ERIC Educational Resources Information Center

    Michelson, Elana; Mandell, Alan

    2004-01-01

    For over thirty years, portfolios have been used to help adult learners gain recognition for their prior learning and take greater control of their educational experiences. The portfolio has become a distinctive means of assessing such learning, serving as a meaningful alternative to conventional papers and standardized testing. This book provides…

  15. The Use of E-Portfolio in a Linear Algebra Course

    ERIC Educational Resources Information Center

    Torres, Judit Taberna; García-Planas, María Isabel; Domínguez-García, Santiago

    2016-01-01

    The use of e-portfolio becomes a standard tool when it comes to learning and student's assessment. This is due to the teachers need for enhancing their students' autonomy. The use of e-portfolio helps students to focus on their own learning process. Lectures should not be limited only to classes, but must foster active learning, and in this…

  16. Portfolio Development and the Assessment of Prior Learning: Perspectives, Models and Practices. Second Edition

    ERIC Educational Resources Information Center

    Michelson, Elana; Mandell, Alan

    2004-01-01

    For over thirty years, portfolios have been used to help adult learners gain recognition for their prior learning and take greater control of their educational experiences. The portfolio has become a distinctive means of assessing such learning, serving as a meaningful alternative to conventional papers and standardized testing. This book provides…

  17. Do Portfolios Have a Future?

    ERIC Educational Resources Information Center

    Driessen, Erik

    2017-01-01

    While portfolios have seen an unprecedented surge in popularity, they have also become the subject of controversy: learners often perceive little gain from writing reflections as part of their portfolios; scholars question the ethics of such obligatory reflection; and students, residents, teachers and scholars alike condemn the bureaucracy…

  18. Do Portfolios Have a Future?

    ERIC Educational Resources Information Center

    Driessen, Erik

    2017-01-01

    While portfolios have seen an unprecedented surge in popularity, they have also become the subject of controversy: learners often perceive little gain from writing reflections as part of their portfolios; scholars question the ethics of such obligatory reflection; and students, residents, teachers and scholars alike condemn the bureaucracy…

  19. Nurturing Student Learning Through Portfolios.

    ERIC Educational Resources Information Center

    Gottlieb, Margo

    1995-01-01

    Outlines a CRADLE (Collections, Reflections, Assessment, Documentation, Linkages, and Evaluation) approach to portfolio development and use in English-as-a-Second-Language classrooms. This approach focuses on a long-term commitment to portfolio usage by teachers, students, parents, and administrators. (MDM)

  20. Portfolios for Biology Teacher Assessment.

    ERIC Educational Resources Information Center

    Collins, Angelo

    1991-01-01

    The research of the Biology component of the Teacher Assessment Project (BioTAP) of Stanford (California) University is described. BioTAP uses portfolio development as an important aspect of teacher assessment. Advantages and drawbacks of teacher portfolios are discussed, including issues of validity and reliability. (SLD)

  1. Electronic Portfolios: Why? What? How?

    ERIC Educational Resources Information Center

    Aschermann, Jerry R.

    Prospective employers and external accreditation agencies today expect preservice teachers to fully document their success in a teacher education program. Missouri Western State College (MWSC) moved from the "scrapbook" portfolio to the World Wide Web delivered electronic portfolio in three years. This paper explains why MWSC chose to…

  2. Academic Misconduct in Teaching Portfolios

    ERIC Educational Resources Information Center

    Erikson, Martin G.; Erlandson, Peter; Erikson, Malgorzata

    2015-01-01

    Within academia, clear and standardised communication is vital. From this point of departure, we discuss the trustworthiness of teaching portfolios when used in assessment. Here, misconduct and fraud are discussed in terms of fabrication, falsification, and plagiarism, following the literature on research fraud. We argue that the portfolio's…

  3. Teaching Portfolios and University Culture

    ERIC Educational Resources Information Center

    Leggett, Monica; Bunker, Alison

    2006-01-01

    The teaching portfolio has been proposed as a useful management tool for monitoring and improving teaching. It is one of the accountability mechanisms that universities have introduced in a market-oriented environment. However, there has been considerable resistance to the compulsory introduction of teaching portfolios from a wide range of…

  4. Digital Portfolios: Documenting Student Growth

    ERIC Educational Resources Information Center

    Cramer, Matthew

    2009-01-01

    The digital portfolio process at Camino Nuevo High School (CNHS) offers an essential 21st century skill to students. All students are trained in basic web design to build and maintain their digital portfolios. These skills equip them with tools they will likely use in their future endeavors in college and the professional world. Teachers at CNHS…

  5. Academic Misconduct in Teaching Portfolios

    ERIC Educational Resources Information Center

    Erikson, Martin G.; Erlandson, Peter; Erikson, Malgorzata

    2015-01-01

    Within academia, clear and standardised communication is vital. From this point of departure, we discuss the trustworthiness of teaching portfolios when used in assessment. Here, misconduct and fraud are discussed in terms of fabrication, falsification, and plagiarism, following the literature on research fraud. We argue that the portfolio's…

  6. Portfolios for Biology Teacher Assessment.

    ERIC Educational Resources Information Center

    Collins, Angelo

    1991-01-01

    The research of the Biology component of the Teacher Assessment Project (BioTAP) of Stanford (California) University is described. BioTAP uses portfolio development as an important aspect of teacher assessment. Advantages and drawbacks of teacher portfolios are discussed, including issues of validity and reliability. (SLD)

  7. Developing an Effective Teaching Portfolio.

    ERIC Educational Resources Information Center

    Wolf, Kenneth

    1996-01-01

    When carefully conceived, portfolios can significantly advance a teacher's professional growth and preserve evidence of exemplary teaching. More than a scrapbook or steamer trunk of eye-catching materials, a teaching portfolio is an ongoing, collaborative process that carefully and thoughtfully documents a set of accomplishments attained over an…

  8. Kentucky Writing and Math Portfolios.

    ERIC Educational Resources Information Center

    Saylor, Kim; Overton, June

    Teachers in Kentucky are using portfolios to determine strengths and weaknesses of individual students. Consequently, instruction is centered totally around the student. The implementation of portfolios sends the message to students that their first efforts should not be their last. Revision is part of improvement, and students are expected to…

  9. Electronic Portfolios. [SITE 2002 Section].

    ERIC Educational Resources Information Center

    Barrett, Helen C., Ed.

    This document contains the following papers on electronic portfolios from the SITE (Society for Information Technology & Teacher Education) 2002 conference: (1) "What Is the Perceived Value of Creating Electronic Portfolios to Teacher Credential Candidates?" (Valerie Amber and Brenda Czech); (2) "Development and Use of…

  10. Portfolios of Quantum Algorithms

    NASA Astrophysics Data System (ADS)

    Maurer, Sebastian M.; Hogg, Tad; Huberman, Bernardo A.

    2001-12-01

    Quantum computation holds promise for the solution of many intractable problems. However, since many quantum algorithms are stochastic in nature they can find the solution of hard problems only probabilistically. Thus the efficiency of the algorithms has to be characterized by both the expected time to completion and the associated variance. In order to minimize both the running time and its uncertainty, we show that portfolios of quantum algorithms analogous to those of finance can outperform single algorithms when applied to the NP-complete problems such as 3-satisfiability.

  11. Biocatalytic portfolio of Basidiomycota.

    PubMed

    Schmidt-Dannert, Claudia

    2016-04-01

    Basidiomycota fungi have received little attention for applications in biocatalysis and biotechnology and remain greatly understudied despite their importance for carbon recycling, ecosystem functioning and medicinal properties. The steady influx of genome data has facilitated detailed studies aimed at understanding the evolution and function of fungal lignocellulose degradation. These studies and recent explorations into the secondary metabolomes have uncovered large portfolios of enzymes useful for biocatalysis and biosynthesis. This review will provide an overview of the biocatalytic repertoires of Basidiomycota characterized to date with the hope of motivation more research into the chemical toolkits of this diverse group of fungi.

  12. 12 CFR 347.108 - Portfolio investments.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Portfolio investments. 347.108 Section 347.108... INTERNATIONAL BANKING § 347.108 Portfolio investments. (a) Portfolio investments. If a bank, directly or indirectly, acquires or holds an equity interest in a foreign organization as a portfolio investment and...

  13. 12 CFR 347.108 - Portfolio investments.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 5 2014-01-01 2014-01-01 false Portfolio investments. 347.108 Section 347.108... INTERNATIONAL BANKING § 347.108 Portfolio investments. (a) Portfolio investments. If a bank, directly or indirectly, acquires or holds an equity interest in a foreign organization as a portfolio investment and the...

  14. 12 CFR 347.108 - Portfolio investments.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 4 2011-01-01 2011-01-01 false Portfolio investments. 347.108 Section 347.108... INTERNATIONAL BANKING § 347.108 Portfolio investments. (a) Portfolio investments. If a bank, directly or indirectly, acquires or holds an equity interest in a foreign organization as a portfolio investment and the...

  15. 12 CFR 347.108 - Portfolio investments.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 5 2012-01-01 2012-01-01 false Portfolio investments. 347.108 Section 347.108... INTERNATIONAL BANKING § 347.108 Portfolio investments. (a) Portfolio investments. If a bank, directly or indirectly, acquires or holds an equity interest in a foreign organization as a portfolio investment and the...

  16. 12 CFR 347.108 - Portfolio investments.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 5 2013-01-01 2013-01-01 false Portfolio investments. 347.108 Section 347.108... INTERNATIONAL BANKING § 347.108 Portfolio investments. (a) Portfolio investments. If a bank, directly or indirectly, acquires or holds an equity interest in a foreign organization as a portfolio investment and the...

  17. Portfolio applications in a school of nursing.

    PubMed

    Ryan, M; Carlton, K H

    1997-01-01

    The portfolio is an effective way to document and evaluate academic and career development. The authors discuss various applications of the process of portfolio implementation via computer in a graduate school of nursing. Portfolio guidelines, format, and a program outcome grid are presented. The portfolio also provides product information that can be used by faculty members for program evaluation.

  18. Regularizing portfolio optimization

    NASA Astrophysics Data System (ADS)

    Still, Susanne; Kondor, Imre

    2010-07-01

    The optimization of large portfolios displays an inherent instability due to estimation error. This poses a fundamental problem, because solutions that are not stable under sample fluctuations may look optimal for a given sample, but are, in effect, very far from optimal with respect to the average risk. In this paper, we approach the problem from the point of view of statistical learning theory. The occurrence of the instability is intimately related to over-fitting, which can be avoided using known regularization methods. We show how regularized portfolio optimization with the expected shortfall as a risk measure is related to support vector regression. The budget constraint dictates a modification. We present the resulting optimization problem and discuss the solution. The L2 norm of the weight vector is used as a regularizer, which corresponds to a diversification 'pressure'. This means that diversification, besides counteracting downward fluctuations in some assets by upward fluctuations in others, is also crucial because it improves the stability of the solution. The approach we provide here allows for the simultaneous treatment of optimization and diversification in one framework that enables the investor to trade off between the two, depending on the size of the available dataset.

  19. Renewable Portfolio Standards: Costs and Benefits (Poster)

    SciTech Connect

    Bird, L.; Heeter, J.; Barbose, G.; Weaver, S.; Flores, F.; Kuskova-Burns, K.; Wiser, R.

    2014-10-01

    This report summarizes state-level RPS costs to date, and considers how those costs may evolve going forward given scheduled increases in RPS targets and cost containment mechanisms. The report also summarizes RPS benefits estimates, based on published studies for individual states and discusses key methodological considerations.

  20. Making portfolios work in practice.

    PubMed

    Scholes, Julie; Webb, Christine; Gray, Morag; Endacott, Ruth; Miller, Carolyn; Jasper, Melanie; McMullan, Mirjam

    2004-06-01

    A portfolio captures learning from experience, enables an assessor to measure student learning, acts as a tool for reflective thinking, illustrates critical analytical skills and evidence of self-directed learning and provides a collection of detailed evidence of a person's competence. This paper reports data on how assessors and nursing students match learning outcomes and/or competencies to their practice and then reconstruct those experiences into the format required by the portfolio documentation. The data were gathered as part of a larger study to evaluate the use of portfolios in the assessment of learning and competence in England. This three phase stakeholder evaluation was designed to gain the views of those involved in designing, implementing and using portfolios in nurse education. In phase 2, 122 students and 58 nurse teachers were interviewed about their perceptions of portfolio use, and a further 32 students and 26 assessors were interviewed after they had been observed taking part in an assessment process. Thematic data analysis was used. Assessors and students underwent a complex process of deconstructing learning outcomes/competences to fit these to their practice. These then had to be reconstructed through the written medium to fit the structure of the portfolio. Confirmation that this met teachers' expectations was essential to allay feelings of insecurity. To achieve maximum benefit from the portfolio as a learning tool to link theory and practice, there needs to be a clear fit between the model of portfolio and the professional practice that is to be assessed. Outcomes and competences, as well as the type of evidence required to demonstrate their achievement, and integration of the whole experience should match the students' stage of professional and academic development. Over-complex approaches to practice assessment, particularly in the early stages of students' careers, can detract from clinical learning in favour of learning how to complete

  1. The Medical Educator Teaching Portfolio

    PubMed Central

    Lamki, Neela; Marchand, Mark

    2006-01-01

    A revolution in thinking and redefinition of traditional scholarship by prioritising teaching skills and achievements has led to the birth of the Teaching Portfolio, designed to carry a comprehensive and dynamic record of the teaching activities of the faculty. A teaching portfolio documents the faculty’s teaching scholarship and effectiveness. It is a record of selected information on one’s teaching achievements, skills and strategies and dynamically represents the faculty’s growth, progress and teaching record. The author suggests a template for the Teaching Portfolio of a Medical Educator, which consists of four parts: (1) evaluation, (2) personal professional development, (3) learning processes and (4) an appendix. PMID:21748120

  2. Risk minimization through portfolio replication

    NASA Astrophysics Data System (ADS)

    Ciliberti, S.; Mã©Zard, M.

    2007-05-01

    We use a replica approach to deal with portfolio optimization problems. A given risk measure is minimized using empirical estimates of asset values correlations. We study the phase transition which happens when the time series is too short with respect to the size of the portfolio. We also study the noise sensitivity of portfolio allocation when this transition is approached. We consider explicitely the cases where the absolute deviation and the conditional value-at-risk are chosen as a risk measure. We show how the replica method can study a wide range of risk measures, and deal with various types of time series correlations, including realistic ones with volatility clustering.

  3. Putting portfolios in their place.

    PubMed

    Gannon, F T; Draper, P R; Watson, R; Proctor, S; Norman, I J

    2001-10-01

    This paper discusses the use of portfolios in nursing education and sets this in an international context. It argues that the assessment of clinical competence in the practice setting is inherently problematic, as recognized in certain recent policy documents, and evaluates the role that portfolios can play. A number of theoretical approaches to the definition and use of portfolios are discussed, and particular attention is paid to their reliability and validity as assessment tools. The paper concludes by arguing that there is a need for further research into the credibility, reliability and validity of this approach to the assessment of nurses' competence.

  4. Agriculture: Nurseries and Greenhouses

    EPA Pesticide Factsheets

    Nurseries and Greenhouses. Information about environmental requirements specifically relating to the production of many types of agricultural crops grown in nurseries and greenhouses, such as ornamental plants and specialty fruits and vegetables.

  5. Advancing agricultural greenhouse gas quantification*

    NASA Astrophysics Data System (ADS)

    Olander, Lydia; Wollenberg, Eva; Tubiello, Francesco; Herold, Martin

    2013-03-01

    increased emissions unless we improve production efficiencies and management. Developing countries currently account for about three-quarters of direct emissions and are expected to be the most rapidly growing emission sources in the future (FAO 2011). Reducing agricultural emissions and increasing carbon sequestration in the soil and biomass has the potential to reduce agriculture's contribution to climate change by 5.5-6.0 gigatons (Gt) of carbon dioxide equivalent (CO2eq)/year. Economic potentials, which take into account costs of implementation, range from 1.5 to 4.3 GT CO2eq/year, depending on marginal abatement costs assumed and financial resources committed, with most of this potential in developing countries (Smith et al 2007). The opportunity for mitigation in agriculture is thus significant, and, if realized, would contribute to making this sector carbon neutral. Yet it is only through a robust and shared understanding of how much carbon can be stored or how much CO2 is reduced from mitigation practices that informed decisions can be made about how to identify, implement, and balance a suite of mitigation practices as diverse as enhancing soil organic matter, increasing the digestibility of feed for cattle, and increasing the efficiency of nitrogen fertilizer applications. Only by selecting a portfolio of options adapted to regional characteristics and goals can mitigation needs be best matched to also serve rural development goals, including food security and increased resilience to climate change. Expansion of agricultural land also remains a major contributor of greenhouse gases, with deforestation, largely linked to clearing of land for cultivation or pasture, generating 80% of emissions from developing countries (Hosonuma et al 2012). There are clear opportunities for these countries to address mitigation strategies from the forest and agriculture sector, recognizing that agriculture plays a large role in economic and development potential. In this context

  6. Portfolio Assessment in High School Chemsitry: One Teacher's Guidelines

    NASA Astrophysics Data System (ADS)

    Phelps, Amy J.; Laporte, Mark M.; Mahood, Aileen

    1997-05-01

    It is standard practice in many chemistry classes to accept a correct numerical calculation as evidence of understanding. This happens for a variety of reasons like efficiency of grading and the presumption that evaluation done in this way is truly objective. As teachers of chemistry become more concerned with helping students develop better conceptual understandings and process skills, in addition to the development of algorithmic skills, this type of one dimensional testing is becoming increasingly less appropriate as the sole form of assessment. This paper describes the implementation of portfolio assessment in high school chemistry classrooms by one teacher in an effort to hold students accountable for more than factual recall and to involve students with an opportunity to reflect on their work throughout the year and to tell the story of their experience in high school chemistry through presentation of their best work. The portfolio was not the only assessment used in the classroom, but was a culminating experience for the students and the teacher. Early in the year the teacher established three main categories which were sub-divided into nine distinct portfolio elements. Students had to include five of the nine elements in their final portfolio project. The nine elements by category were: Category I: solve a problem, design an experiment, analyze a result, group effort in problem solving; Category II: Identify a misconception, evolution of a concept, shows growth or improvement; and Category III: defend a position and critique a current event. The portfolio elements were due at specific times throughout the second semester and there was a review process established so the students could refine their assignments. Completing the portfolio allowed students to develop a better understanding of the topics involved in the five portfolio elements through the revision process and it provided the students with the opportunity to think about what they had learned in

  7. The Dynamic Greenhouse Challenge

    ERIC Educational Resources Information Center

    Roman, Harry T.

    2010-01-01

    Greenhouses are marvelous devices, allowing one to enjoy the flower spectacle of summer all year round. At night, greenhouses use supplemental heat to keep the fragile plants warm. Over the last 30 years, greenhouse technology has undergone many changes, with the structures being automated and monitored and low-cost plastic structures emerging as…

  8. Build a Solar Greenhouse.

    ERIC Educational Resources Information Center

    Conservation and Renewable Energy Inquiry and Referral Service (DOE), Silver Spring, MD.

    Attached solar greenhouses are relatively inexpensive and easy to build; they can provide additional heat to homes all winter as well as fresh vegetables and flowers. This bulletin: (1) describes the characteristics of a solar greenhouse; (2) provides a checklist of five items to consider before building a solar greenhouse; (3) describes the four…

  9. The Dynamic Greenhouse Challenge

    ERIC Educational Resources Information Center

    Roman, Harry T.

    2010-01-01

    Greenhouses are marvelous devices, allowing one to enjoy the flower spectacle of summer all year round. At night, greenhouses use supplemental heat to keep the fragile plants warm. Over the last 30 years, greenhouse technology has undergone many changes, with the structures being automated and monitored and low-cost plastic structures emerging as…

  10. Robust Portfolio Optimization Using Pseudodistances.

    PubMed

    Toma, Aida; Leoni-Aubin, Samuela

    2015-01-01

    The presence of outliers in financial asset returns is a frequently occurring phenomenon which may lead to unreliable mean-variance optimized portfolios. This fact is due to the unbounded influence that outliers can have on the mean returns and covariance estimators that are inputs in the optimization procedure. In this paper we present robust estimators of mean and covariance matrix obtained by minimizing an empirical version of a pseudodistance between the assumed model and the true model underlying the data. We prove and discuss theoretical properties of these estimators, such as affine equivariance, B-robustness, asymptotic normality and asymptotic relative efficiency. These estimators can be easily used in place of the classical estimators, thereby providing robust optimized portfolios. A Monte Carlo simulation study and applications to real data show the advantages of the proposed approach. We study both in-sample and out-of-sample performance of the proposed robust portfolios comparing them with some other portfolios known in literature.

  11. Does health affect portfolio choice?

    PubMed

    Love, David A; Smith, Paul A

    2010-12-01

    A number of recent studies find that poor health is empirically associated with a safer portfolio allocation. It is difficult to say, however, whether this relationship is truly causal. Both health status and portfolio choice are influenced by unobserved characteristics such as risk attitudes, impatience, information, and motivation, and these unobserved factors, if not adequately controlled for, can induce significant bias in the estimates of asset demand equations. Using the 1992-2006 waves of the Health and Retirement Study, we investigate how much of the connection between health and portfolio choice is causal and how much is due to the effects of unobserved heterogeneity. Accounting for unobserved heterogeneity with fixed effects and correlated random effects models, we find that health does not appear to significantly affect portfolio choice among single households. For married households, we find a small effect (about 2-3 percentage points) from being in the lowest of five self-reported health categories.

  12. 75 FR 81405 - Portfolio Holdings

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-28

    ... Treasury capital infusions under the PSPAs to remain solvent. The circumstances of the portfolio regulation... conservatorship and supported by Treasury infusions of capital. The principal concerns of the statute are...

  13. 12 CFR 34.62 - Real estate lending standards.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... portfolio diversification standards; (ii) Prudent underwriting standards, including loan-to-value limits... reflect consideration of the Interagency Guidelines for Real Estate Lending Policies established by...

  14. ePortfolio as a Measure of Reflective Practice

    ERIC Educational Resources Information Center

    Parkes, Kelly A.; Dredger, Katie S.; Hicks, David

    2013-01-01

    This instructional article outlines the qualities of effective ePortfolios and how reflection and student growth is measured. Student exemplars and assessment rubrics show how, despite changing tools and evolving standards, sustained collaboration and student coaching yields reflective practitioners in content areas and in technological knowledge.…

  15. An alternative computational method for finding the minimum-premium insurance portfolio

    NASA Astrophysics Data System (ADS)

    Katsikis, Vasilios N.

    2016-06-01

    In this article, we design a computational method, which differs from the standard linear programming techniques, for computing the minimum-premium insurance portfolio. The corresponding algorithm as well as a Matlab implementation are provided.

  16. Portfolios: an 'affective' assessment strategy?

    PubMed

    Glen, S; Hight, N F

    1992-12-01

    The curriculum research and development work undertaken to facilitate the implementation of a portfolio assessment strategy, as an integral component of a Project 2000 course, is described. Many excellent assessment schemes have floundered at the point of being put in to use, thus the question of consultation, reflection and preparation needs to figure from the early stages in the scheme is to be successful. This should include in-service education for nurse and midwifery educators and preparation of students. The principle questions explored in the paper are: What educational values do portfolios have? Against what criteria should students make decisions in relation to content? Against what criteria are educators to assess portfolios? The issue of evaluation of portfolio schemes is likely to determine whether portfolios maintain the important place they have captured in the nursing and midwifery education imagination. Finally, it is argued that innovations, such as portfolios, should be seen as catalysts, as points of departure, rather than as things to be implemented.

  17. Assessment of technologies to meet a low carbon fuel standard.

    PubMed

    Yeh, Sonia; Lutsey, Nicholas P; Parker, Nathan C

    2009-09-15

    California's low carbon fuel standard (LCFS) was designed to incentivize a diverse array of available strategies for reducing transportation greenhouse gas (GHG) emissions. It provides strong incentives for fuels with lower GHG emissions, while explicitly requiring a 10% reduction in California's transportation fuel GHG intensity by 2020. This paper investigates the potential for cost-effective GHG reductions from electrification and expanded use of biofuels. The analysis indicates that fuel providers could meetthe standard using a portfolio approach that employs both biofuels and electricity, which would reduce the risks and uncertainties associated with the progress of cellulosic and battery technologies, feedstock prices, land availability, and the sustainability of the various compliance approaches. Our analysis is based on the details of California's development of an LCFS; however, this research approach could be generalizable to a national U.S. standard and to similar programs in Europe and Canada.

  18. Regional allocation of biomass to U.S. energy demands under a portfolio of policy scenarios.

    PubMed

    Mullins, Kimberley A; Venkatesh, Aranya; Nagengast, Amy L; Kocoloski, Matt

    2014-01-01

    The potential for widespread use of domestically available energy resources, in conjunction with climate change concerns, suggest that biomass may be an essential component of U.S. energy systems in the near future. Cellulosic biomass in particular is anticipated to be used in increasing quantities because of policy efforts, such as federal renewable fuel standards and state renewable portfolio standards. Unfortunately, these independently designed biomass policies do not account for the fact that cellulosic biomass can equally be used for different, competing energy demands. An integrated assessment of multiple feedstocks, energy demands, and system costs is critical for making optimal decisions about a unified biomass energy strategy. This study develops a spatially explicit, best-use framework to optimally allocate cellulosic biomass feedstocks to energy demands in transportation, electricity, and residential heating sectors, while minimizing total system costs and tracking greenhouse gas emissions. Comparing biomass usage across three climate policy scenarios suggests that biomass used for space heating is a low cost emissions reduction option, while biomass for liquid fuel or for electricity becomes attractive only as emissions reduction targets or carbon prices increase. Regardless of the policy approach, study results make a strong case for national and regional coordination in policy design and compliance pathways.

  19. Fuzzy portfolio model with fuzzy-input return rates and fuzzy-output proportions

    NASA Astrophysics Data System (ADS)

    Tsaur, Ruey-Chyn

    2015-02-01

    In the finance market, a short-term investment strategy is usually applied in portfolio selection in order to reduce investment risk; however, the economy is uncertain and the investment period is short. Further, an investor has incomplete information for selecting a portfolio with crisp proportions for each chosen security. In this paper we present a new method of constructing fuzzy portfolio model for the parameters of fuzzy-input return rates and fuzzy-output proportions, based on possibilistic mean-standard deviation models. Furthermore, we consider both excess or shortage of investment in different economic periods by using fuzzy constraint for the sum of the fuzzy proportions, and we also refer to risks of securities investment and vagueness of incomplete information during the period of depression economics for the portfolio selection. Finally, we present a numerical example of a portfolio selection problem to illustrate the proposed model and a sensitivity analysis is realised based on the results.

  20. Universal portfolios generated by the Bregman divergence

    NASA Astrophysics Data System (ADS)

    Tan, Choon Peng; Kuang, Kee Seng

    2017-04-01

    The Bregman divergence of two probability vectors is a stronger form of the f-divergence introduced by Csiszar. Two versions of the Bregman universal portfolio are presented by exploiting the mean-value theorem. The explicit form of the Bregman universal portfolio generated by a function of a convex polynomial is derived and studied empirically. This portfolio can be regarded as another generalized of the well-known Helmbold portfolio. By running the portfolios on selected stock-price data sets from the local stock exchange, it is shown that it is possible to increase the wealth of the investor by using the portfolios in investment.

  1. Portfolio as a learning tool: students' perspective.

    PubMed

    Elango, S; Jutti, R C; Lee, L K

    2005-09-01

    Portfolio writing is a method of encouraging reflective learning among professionals. Although portfolio-based learning is popular among educators, not many studies have been done to determine students' perceptions of portfolio as a learning tool. A questionnaire survey was conducted among 143 medical students to find out their perceptions of the portfolio as a learning tool. A majority of the students felt that the portfolio is a good learning tool. However, they also perceived that it is stressful and time-consuming to develop a proper portfolio. The study indicates that students need appropriate guidance from the academic staff for the system to succeed.

  2. Land-Use Portfolio Modeler, Version 1.0

    USGS Publications Warehouse

    Taketa, Richard; Hong, Makiko

    2010-01-01

    Natural hazards pose significant threats to the public safety and economic health of many communities throughout the world. Community leaders and decision-makers continually face the challenges of planning and allocating limited resources to invest in protecting their communities against catastrophic losses from natural-hazard events. Public efforts to assess community vulnerability and encourage loss-reduction measures through mitigation often focused on either aggregating site-specific estimates or adopting standards based upon broad assumptions about regional risks. The site-specific method usually provided the most accurate estimates, but was prohibitively expensive, whereas regional risk assessments were often too general to be of practical use. Policy makers lacked a systematic and quantitative method for conducting a regional-scale risk assessment of natural hazards. In response, Bernknopf and others developed the portfolio model, an intermediate-scale approach to assessing natural-hazard risks and mitigation policy alternatives. The basis for the portfolio-model approach was inspired by financial portfolio theory, which prescribes a method of optimizing return on investment while reducing risk by diversifying investments in different security types. In this context, a security type represents a unique combination of features and hazard-risk level, while financial return is defined as the reduction in losses resulting from an investment in mitigation of chosen securities. Features are selected for mitigation and are modeled like investment portfolios. Earth-science and economic data for the features are combined and processed in order to analyze each of the portfolios, which are then used to evaluate the benefits of mitigating the risk in selected locations. Ultimately, the decision maker seeks to choose a portfolio representing a mitigation policy that maximizes the expected return-on-investment, while minimizing the uncertainty associated with that return

  3. [Irrigation scheduling with a 20 cm standard pan for drip-irrigated cucumber grown in solar greenhouse in the North China Plain].

    PubMed

    Gong, Xue-wen; Sun, Jing-sheng; Liu, Hao; Zhang, Hao; Wu, Xiao-lei; Sun, Yu-hong

    2015-11-01

    An experiment was conducted in 2013 and 2014 at the Xinxiang Comprehensive Experimental Station, Chinese Academy of Agriculture Sciences. Water amount was estimated with the Ep-20 and pan coefficient. Responses of cucumber evapotranspiration (ET), yield, quality and water use efficiency (WUE) to different drip irrigation amounts (Kcp1: 0.25; Kcp2: 0.5; Kcp3: 0.75; Kcp4: 1.0; Kcp5: 1.25) were investigated. The possibility of developing drip irrigation scheduling using the 20 cm pan was also discussed. Results showed that the seasonal evapotranspiration of cucumber ranged between 129 and 314 mm, and the water consumption generally increased with the increase in drip irrigation water amount. There was no significance difference in cucumber yield between the treatments with Kcp > 0.75, and the responses of mean fruit mass, number and length to water amount had a threshold value (0.75Ep-20). Regarding the fruit quality, the contents of total soluble solids, vitamin C and soluble sugar slightly decreased with increasing the irrigation water amount, while the soluble protein content varied in order as: Kcp2 > Kcp3 > Kcp4 > Kcp1 > Kcp5. There was a significant positive correlation (P < 0.01) between the pan evaporation and the reference crop evapotranspiration estimated based on a modified Penman-Monteith equation. In a conclusion, the drip water amount calculated with Kcp of 0.75 and the 20 cm pan were easy and feasible for cucumber cultivation in solar greenhouse in the North China Plain.

  4. Portfolio Planner: A Step-by-Step Guide to Portfolio Assessment.

    ERIC Educational Resources Information Center

    Jasmine, Julia

    This guide presents a step-by-step portfolio assessment method for teachers who want to implement portfolio assessment in their classrooms. Portfolio assessment is not neat or tidy in its early stages, but tidy and organized portfolios can be constructed if the outlined steps are followed. These are: (1) storage and establishing a file for each…

  5. Risks of Large Portfolios.

    PubMed

    Fan, Jianqing; Liao, Yuan; Shi, Xiaofeng

    2015-06-01

    The risk of a large portfolio is often estimated by substituting a good estimator of the volatility matrix. However, the accuracy of such a risk estimator is largely unknown. We study factor-based risk estimators under a large amount of assets, and introduce a high-confidence level upper bound (H-CLUB) to assess the estimation. The H-CLUB is constructed using the confidence interval of risk estimators with either known or unknown factors. We derive the limiting distribution of the estimated risks in high dimensionality. We find that when the dimension is large, the factor-based risk estimators have the same asymptotic variance no matter whether the factors are known or not, which is slightly smaller than that of the sample covariance-based estimator. Numerically, H-CLUB outperforms the traditional crude bounds, and provides an insightful risk assessment. In addition, our simulated results quantify the relative error in the risk estimation, which is usually negligible using 3-month daily data.

  6. Risks of Large Portfolios

    PubMed Central

    Fan, Jianqing; Liao, Yuan; Shi, Xiaofeng

    2014-01-01

    The risk of a large portfolio is often estimated by substituting a good estimator of the volatility matrix. However, the accuracy of such a risk estimator is largely unknown. We study factor-based risk estimators under a large amount of assets, and introduce a high-confidence level upper bound (H-CLUB) to assess the estimation. The H-CLUB is constructed using the confidence interval of risk estimators with either known or unknown factors. We derive the limiting distribution of the estimated risks in high dimensionality. We find that when the dimension is large, the factor-based risk estimators have the same asymptotic variance no matter whether the factors are known or not, which is slightly smaller than that of the sample covariance-based estimator. Numerically, H-CLUB outperforms the traditional crude bounds, and provides an insightful risk assessment. In addition, our simulated results quantify the relative error in the risk estimation, which is usually negligible using 3-month daily data. PMID:26195851

  7. Portfolio optimization with mean-variance model

    NASA Astrophysics Data System (ADS)

    Hoe, Lam Weng; Siew, Lam Weng

    2016-06-01

    Investors wish to achieve the target rate of return at the minimum level of risk in their investment. Portfolio optimization is an investment strategy that can be used to minimize the portfolio risk and can achieve the target rate of return. The mean-variance model has been proposed in portfolio optimization. The mean-variance model is an optimization model that aims to minimize the portfolio risk which is the portfolio variance. The objective of this study is to construct the optimal portfolio using the mean-variance model. The data of this study consists of weekly returns of 20 component stocks of FTSE Bursa Malaysia Kuala Lumpur Composite Index (FBMKLCI). The results of this study show that the portfolio composition of the stocks is different. Moreover, investors can get the return at minimum level of risk with the constructed optimal mean-variance portfolio.

  8. Taking Portfolios to the Next Level.

    ERIC Educational Resources Information Center

    Kennedy, Susan; Street, Terri

    1998-01-01

    Surveys the wide range of uses of student portfolios in secondary and higher education. Suggestions include using the portfolio to cultivate reflective thinking about learning and as a document submitted with college admission applications. (DDR)

  9. Dynamic Portfolio Strategy Using Clustering Approach.

    PubMed

    Ren, Fei; Lu, Ya-Nan; Li, Sai-Ping; Jiang, Xiong-Fei; Zhong, Li-Xin; Qiu, Tian

    2017-01-01

    The problem of portfolio optimization is one of the most important issues in asset management. We here propose a new dynamic portfolio strategy based on the time-varying structures of MST networks in Chinese stock markets, where the market condition is further considered when using the optimal portfolios for investment. A portfolio strategy comprises two stages: First, select the portfolios by choosing central and peripheral stocks in the selection horizon using five topological parameters, namely degree, betweenness centrality, distance on degree criterion, distance on correlation criterion and distance on distance criterion. Second, use the portfolios for investment in the investment horizon. The optimal portfolio is chosen by comparing central and peripheral portfolios under different combinations of market conditions in the selection and investment horizons. Market conditions in our paper are identified by the ratios of the number of trading days with rising index to the total number of trading days, or the sum of the amplitudes of the trading days with rising index to the sum of the amplitudes of the total trading days. We find that central portfolios outperform peripheral portfolios when the market is under a drawup condition, or when the market is stable or drawup in the selection horizon and is under a stable condition in the investment horizon. We also find that peripheral portfolios gain more than central portfolios when the market is stable in the selection horizon and is drawdown in the investment horizon. Empirical tests are carried out based on the optimal portfolio strategy. Among all possible optimal portfolio strategies based on different parameters to select portfolios and different criteria to identify market conditions, 65% of our optimal portfolio strategies outperform the random strategy for the Shanghai A-Share market while the proportion is 70% for the Shenzhen A-Share market.

  10. Dynamic Portfolio Strategy Using Clustering Approach

    PubMed Central

    Lu, Ya-Nan; Li, Sai-Ping; Jiang, Xiong-Fei; Zhong, Li-Xin; Qiu, Tian

    2017-01-01

    The problem of portfolio optimization is one of the most important issues in asset management. We here propose a new dynamic portfolio strategy based on the time-varying structures of MST networks in Chinese stock markets, where the market condition is further considered when using the optimal portfolios for investment. A portfolio strategy comprises two stages: First, select the portfolios by choosing central and peripheral stocks in the selection horizon using five topological parameters, namely degree, betweenness centrality, distance on degree criterion, distance on correlation criterion and distance on distance criterion. Second, use the portfolios for investment in the investment horizon. The optimal portfolio is chosen by comparing central and peripheral portfolios under different combinations of market conditions in the selection and investment horizons. Market conditions in our paper are identified by the ratios of the number of trading days with rising index to the total number of trading days, or the sum of the amplitudes of the trading days with rising index to the sum of the amplitudes of the total trading days. We find that central portfolios outperform peripheral portfolios when the market is under a drawup condition, or when the market is stable or drawup in the selection horizon and is under a stable condition in the investment horizon. We also find that peripheral portfolios gain more than central portfolios when the market is stable in the selection horizon and is drawdown in the investment horizon. Empirical tests are carried out based on the optimal portfolio strategy. Among all possible optimal portfolio strategies based on different parameters to select portfolios and different criteria to identify market conditions, 65% of our optimal portfolio strategies outperform the random strategy for the Shanghai A-Share market while the proportion is 70% for the Shenzhen A-Share market. PMID:28129333

  11. 40 CFR 86.1818-12 - Greenhouse gas emission standards for light-duty vehicles, light-duty trucks, and medium-duty...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... standards determined in this paragraph (c) shall be expressed in whole grams per mile, in the model year... with a footprint of less than or equal to 41 square feet, the gram/mile CO2 target value shall be selected for the appropriate model year from the following table: Model year CO2 targetvalue...

  12. Student Teacher's Portfolio Handbook [and] Evaluation of Student Teachers Guidebook [and] Implementation Guide for Evaluation of Student Teachers.

    ERIC Educational Resources Information Center

    Ball State Univ., Muncie, IN.

    This document contains a Handbook, a Guidebook, and an Implementation Guide. The Handbook, designed to complement the Guidebook, discusses topics such as: "What is an Educational Portfolio?"; "Types of Portfolios in the Teacher Preparation Program"; "Types of Artifacts for Documentation in the INTASC Standards";…

  13. Portfolio Management Best Practices: Observations from Industry

    DTIC Science & Technology

    2008-05-15

    term projects; “small” versus “major” efforts; ongoing versus new projects; business units; etc. Appropriate Methods for Balancing the Portfolio Bubble... PMBOK Guide” (2006). SAP, “SAP xApps: Enterprise Portfolio Management” (2005). Silberglitt, Richard, Portfolio Analysis and Management for Naval

  14. An Electronic Portfolio to Support Learning

    ERIC Educational Resources Information Center

    Wade, Anne; Abrami, Philip C.; Sclater, Jennifer

    2005-01-01

    In this paper, we provide a description of a CSLP research project that looked at portfolio use within a middle school, the web-based e-portfolio software we have developed within the context of the Quebec educational system, our plans for further development of the tool, and our research plans related to the use of portfolios to support learning.…

  15. Using Portfolios To Assess Teacher Performance.

    ERIC Educational Resources Information Center

    Wheeler, Patricia H.

    This paper offers suggestions for using portfolios to assess teacher performance. Key policy decisions that should be addressed prior to preparation of the portfolios include purpose, domains, audience, administrative matters, technical issues, and legal issues. After these policy decisions have been made, guidelines for portfolio design--its…

  16. Universal portfolios generated by Toeplitz matrices

    NASA Astrophysics Data System (ADS)

    Tan, Choon Peng; Chu, Sin Yen; Pan, Wei Yeing

    2014-06-01

    Performance of universal portfolios generated by Toeplitz matrices is studied in this paper. The general structure of the companion matrix of the generating Toeplitz matrix is determined. Empirical performance of the threeband and nine-band Toeplitz universal portfolios on real stock data is presented. Pseudo Toeplitz universal portfolios are studied with promising empirical achievement of wealth demonstrated.

  17. Using Electronic Portfolios for Second Language Assessment

    ERIC Educational Resources Information Center

    Cummins, Patricia W.; Davesne, Celine

    2009-01-01

    Portfolio assessment as developed in Europe presents a learner-empowering alternative to computer-based testing. The authors present the European Language Portfolio (ELP) and its American adaptations, LinguaFolio and the Global Language Portfolio, as tools to be used with the Common European Framework of Reference for languages and the American…

  18. Using Electronic Portfolios for Second Language Assessment

    ERIC Educational Resources Information Center

    Cummins, Patricia W.; Davesne, Celine

    2009-01-01

    Portfolio assessment as developed in Europe presents a learner-empowering alternative to computer-based testing. The authors present the European Language Portfolio (ELP) and its American adaptations, LinguaFolio and the Global Language Portfolio, as tools to be used with the Common European Framework of Reference for languages and the American…

  19. The Scoring of Writing Portfolios: Phase 2

    ERIC Educational Resources Information Center

    White, Edward M.

    2005-01-01

    Although most portfolio evaluation currently uses some adaptation of holistic scoring, the problems with scoring portfolios holistically are many, much more than for essays, and the problems are not readily resolvable. Indeed, many aspects of holistic scoring work against the principles behind portfolio assessment. We have from the start needed a…

  20. Teaching Portfolios at a Research University.

    ERIC Educational Resources Information Center

    Davis, Joe T.; Swift, Louis J.

    1995-01-01

    Circumstances leading to 1992 adoption of teaching portfolios for faculty evaluation at the University of Kentucky are outlined, the implementation process is described, and results of a faculty survey following the first round of portfolio development are reported. Despite some obvious difficulties, responses to the portfolio approach were more…

  1. Technology for Online Portfolio Assessment Programs

    ERIC Educational Resources Information Center

    Ferrara, Victoria M.

    2010-01-01

    Portfolio assessment is a valid and reliable method to assess experiential learning. Developing a fully online portfolio assessment program is neither easy nor inexpensive. The institution seeking to take its portfolio assessment program online must make a commitment to its students by offering the technologies most suited to meet students' needs.…

  2. Assessment Portfolios as Opportunities for Teacher Learning

    ERIC Educational Resources Information Center

    Gearhart, Maryl; Osmundson, Ellen

    2009-01-01

    This article is an analysis of the role of assessment portfolios in teacher learning. Over 18 months, 23 science teachers developed, implemented, and evaluated assessments to track student learning, supported by portfolio tasks and resources, grade-level colleagues, and team facilitators. Evidence of teacher learning included (a) portfolios of a…

  3. Technology for Online Portfolio Assessment Programs

    ERIC Educational Resources Information Center

    Ferrara, Victoria M.

    2010-01-01

    Portfolio assessment is a valid and reliable method to assess experiential learning. Developing a fully online portfolio assessment program is neither easy nor inexpensive. The institution seeking to take its portfolio assessment program online must make a commitment to its students by offering the technologies most suited to meet students' needs.…

  4. Professional Portfolios for Practicing Teachers. Fastback 483.

    ERIC Educational Resources Information Center

    Bullock, Ann Adams; Hawk, Parmalee P.

    This booklet provides information about the basic principles of portfolio development, outlining three types of portfolios and offering examples and reflections. The three types of portfolios are process, product, and showcase. Each is compiled for a different reason, though they all: have a specific purpose, are developed for a specific audience,…

  5. Views on Using Portfolio in Teacher Education

    ERIC Educational Resources Information Center

    Imhof, Margarete; Picard, Christin

    2009-01-01

    The usage of portfolio methods to document professional development in teaching is increasing in Germany, but despite its proliferation, the issue of how the effects of portfolio methods can be determined has received little attention. This paper investigates the acceptance of portfolio by the pre-service teachers (N = 144, 112 female) and the…

  6. Developing a Coaching Portfolio: Enhancing Reflective Practice

    ERIC Educational Resources Information Center

    Hubball, Harry; Robertson, Scott

    2004-01-01

    A portfolio is a well-organized document containing critical analyses and evidence related to a coach's background, context(s) of coaching, approach to coaching, coaching accomplishments, and goals for further development. Here, the authors describe different types of coaching portfolios as well as strategies for developing a coaching portfolio.…

  7. 17 CFR 23.503 - Portfolio compression.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 17 Commodity and Securities Exchanges 1 2013-04-01 2013-04-01 false Portfolio compression. 23.503... MAJOR SWAP PARTICIPANTS Swap Documentation § 23.503 Portfolio compression. (a) Portfolio compression... participant in a timely fashion, when appropriate. (2) Bilateral compression. Each swap dealer and major...

  8. 17 CFR 23.503 - Portfolio compression.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 17 Commodity and Securities Exchanges 1 2014-04-01 2014-04-01 false Portfolio compression. 23.503... MAJOR SWAP PARTICIPANTS Swap Documentation § 23.503 Portfolio compression. (a) Portfolio compression... participant in a timely fashion, when appropriate. (2) Bilateral compression. Each swap dealer and major...

  9. E-Portfolios Come of Age

    ERIC Educational Resources Information Center

    Waters, John K.

    2009-01-01

    Industry analysts say the systems have reached a mature adolescence, having grown from mere electronic filing cabinets into multimedia platforms that can operate with a variety of e-learning tools. Their fullest potential still lies ahead. This article talks about electronic portfolios--better known as e-portfolios, and how e-portfolios are taking…

  10. Portfolios: Assessment in Language Arts. ERIC Digest.

    ERIC Educational Resources Information Center

    Farr, Roger

    To serve the function of assessment, the language arts portfolio should be a record of a student's literacy development--a kind of window on the skills and strategies the student uses in reading and writing. Portfolio collections can form the foundation for teacher-student conferences, a vital component of portfolio assessment. The use of…

  11. E-Portfolios Come of Age

    ERIC Educational Resources Information Center

    Waters, John K.

    2009-01-01

    Industry analysts say the systems have reached a mature adolescence, having grown from mere electronic filing cabinets into multimedia platforms that can operate with a variety of e-learning tools. Their fullest potential still lies ahead. This article talks about electronic portfolios--better known as e-portfolios, and how e-portfolios are taking…

  12. Handbook of Research on ePortfolios

    ERIC Educational Resources Information Center

    Jafari, Ali, Ed.; Kaufman, Catherine, Ed.

    2006-01-01

    The "Handbook of Research on ePortfolios" is the single source for comprehensive coverage of the major themes of ePortfolios, addressing all of the major issues, from concept to technology to implementation. It is the first reference publication to provide a complete investigation on a variety of ePortfolio uses through case studies and…

  13. Using Portfolios To Assess Student Performance.

    ERIC Educational Resources Information Center

    McRobbie, Joan

    1992-01-01

    What educators around the country are finding out as they work with portfolios is reviewed, focusing on the classroom. Portfolios are purposeful, collaborative, self-reflective collections of student work generated during the process of instruction. Although they can be used in any academic discipline, portfolios are widely used in English and…

  14. Development of Solution Algorithm and Sensitivity Analysis for Random Fuzzy Portfolio Selection Model

    NASA Astrophysics Data System (ADS)

    Hasuike, Takashi; Katagiri, Hideki

    2010-10-01

    This paper focuses on the proposition of a portfolio selection problem considering an investor's subjectivity and the sensitivity analysis for the change of subjectivity. Since this proposed problem is formulated as a random fuzzy programming problem due to both randomness and subjectivity presented by fuzzy numbers, it is not well-defined. Therefore, introducing Sharpe ratio which is one of important performance measures of portfolio models, the main problem is transformed into the standard fuzzy programming problem. Furthermore, using the sensitivity analysis for fuzziness, the analytical optimal portfolio with the sensitivity factor is obtained.

  15. Portfolios and the market geometry

    NASA Astrophysics Data System (ADS)

    Eleutério, Samuel; Araújo, Tanya; Vilela Mendes, R.

    2014-09-01

    A geometric analysis of return time series, performed in the past, implied that most of the systematic information in the market is contained in a space of small dimension. Here we have explored subspaces of this space to find out the relative performance of portfolios formed from companies that have the largest projections in each one of the subspaces. As expected, it was found that the best performance portfolios are associated with some of the small eigenvalue subspaces and not to the dominant dimensions. This is found to occur in a systematic fashion over an extended period (1990-2008).

  16. Application of Project Portfolio Management

    NASA Astrophysics Data System (ADS)

    Pankowska, Malgorzata

    The main goal of the chapter is the presentation of the application project portfolio management approach to support development of e-Municipality and public administration information systems. The models of how people publish and utilize information on the web have been transformed continually. Instead of simply viewing on static web pages, users publish their own content through blogs and photo- and video-sharing slides. Analysed in this chapter, ICT (Information Communication Technology) projects for municipalities cover the mixture of the static web pages, e-Government information systems, and Wikis. So, for the management of the ICT projects' mixtures the portfolio project management approach is proposed.

  17. Myopia management: multihospital portfolio planning.

    PubMed

    Irish, G G

    1987-10-01

    The acquisition and divestiture of organizational business units demonstrate management's strategy in response to an evolving marketplace. From a strategic perspective, the most significant danger to a corporation is not having the "right" portfolio of businesses or products to respond to the marketplace. This article describes a conceptual model that a multihospital system executive might use to determine the growth and diversification of the organization's portfolio of businesses. The model involves the application of market, financial, and microeconomic theories in a logical sequence to assist management in making business acquisition and divestiture decisions.

  18. 4. Perspective view, greenhouse, from the southwest. The greenhouse is ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Perspective view, greenhouse, from the southwest. The greenhouse is the portion of the seed house to the right (south) of the double doors. - John Bartram House & Garden, Greenhouse, 54th Street & LIndbergh Boulevard, Philadelphia, Philadelphia County, PA

  19. Scientists' internal models of the greenhouse effect

    NASA Astrophysics Data System (ADS)

    Libarkin, J. C.; Miller, H.; Thomas, S. R.

    2013-12-01

    A prior study utilized exploratory factor analysis to identify models underlying drawings of the greenhouse effect made by entering university freshmen. This analysis identified four archetype models of the greenhouse effect that appear within the college enrolling population. The current study collected drawings made by 144 geoscientists, from undergraduate geoscience majors through professionals. These participants scored highly on a standardized assessment of climate change understanding and expressed confidence in their understanding; many also indicated that they teach climate change in their courses. Although geoscientists held slightly more sophisticated greenhouse effect models than entering freshmen, very few held complete, explanatory models. As with freshmen, many scientists (44%) depict greenhouse gases in a layer in the atmosphere; 52% of participants depicted this or another layer as a physical barrier to escaping energy. In addition, 32% of participants indicated that incoming light from the Sun remains unchanged at Earth's surface, in alignment with a common model held by students. Finally, 3-20% of scientists depicted physical greenhouses, ozone, or holes in the atmosphere, all of which correspond to non-explanatory models commonly seen within students and represented in popular literature. For many scientists, incomplete models of the greenhouse effect are clearly enough to allow for reasoning about climate change. These data suggest that: 1) better representations about interdisciplinary concepts, such as the greenhouse effect, are needed for both scientist and public understanding; and 2) the scientific community needs to carefully consider how much understanding of a model is needed before necessary reasoning can occur.

  20. E-portfolio competency metadata: pilot study for a call to action.

    PubMed

    Rao, Sishir; Swartz, Andrew; Obeid, Leila; Rao, Sevith; Joyce, Barbara; Whitehouse, Sarah; Horst, Mathilda; Butler, Jack; Kinnen, Ryan; Shepard, Alexander; Rubinfeld, Ilan

    2012-04-01

    The six competency domains required by the Accreditation Council for Graduate Medical Education (ACGME) have led to a proliferation of measurement tools, assessment methods, and all forms of data from paper to electronic. The need exists to develop a standardized electronic (e)-portfolio to provide the aggregate data to improve education and patient care. This process requires a sound methodology using XML metadata to allow portability of e-portfolio data. We surveyed publicly available metadata and developed an e-portfolio system for the Henry Ford Hospital General Surgery Residency Program. Based on our implementation of e-portfolios for 70 physicians, we call upon the ACGME, the Residency Review Committees, and the American Board of Medical Specialties to establish a method to formalize and develop a standard for residency competency metadata. Using an approach similar to that of our study can streamline data and lead to improved medical education and ultimately better patient care.

  1. Entropy-based portfolio models: Practical issues

    NASA Astrophysics Data System (ADS)

    Shirazi, Yasaman Izadparast; Sabiruzzaman, Md.; Hamzah, Nor Aishah

    2015-10-01

    Entropy is a nonparametric alternative of variance and has been used as a measure of risk in portfolio analysis. In this paper, the computation of entropy risk for a given set of data is discussed with illustration. A comparison between entropy-based portfolio models is made. We propose a natural extension of the mean entropy portfolio to make it more general and diversified. In terms of performance, this new model is similar to the mean-entropy portfolio when applied to real and simulated data, and offers higher return if no constraint is set for the desired return; also it is found to be the most diversified portfolio model.

  2. Performance of the reverse Helmbold universal portfolio

    NASA Astrophysics Data System (ADS)

    Tan, Choon Peng; Kuang, Kee Seng; Lee, Yap Jia

    2017-04-01

    The universal portfolio is an important investment strategy in a stock market where no stochastic model is assumed for the stock prices. The zero-gradient set of the objective function estimating the next-day portfolio which contains the reverse Kullback-Leibler order-alpha divergence is considered. From the zero-gradient set, the explicit, reverse Helmbold universal portfolio is obtained. The performance of the explicit, reverse Helmbold universal portfolio is studied by running them on some stock-price data sets from the local stock exchange. It is possible to increase the wealth of the investor by using these portfolios in investment.

  3. AVC/H.264 patent portfolio license

    NASA Astrophysics Data System (ADS)

    Horn, Lawrence A.

    2005-08-01

    MPEG LA, LLC offers a joint patent license for the AVC (a/k/a H.264) Standard (ISO/IEC IS 14496-10:2004). Like MPEG LA's other licenses, the AVC Patent Portfolio License is offered for the convenience of the marketplace as an alternative enabling users to access essential intellectual property owned by many patent holders under a single license rather than negotiating licenses with each of them individually. The AVC Patent Portfolio License includes essential patents owned by Electronics and Telecommunications Research Institute (ETRI); France Telecom, societe anonyme; Fujitsu Limited; Koninklijke Philips Electronics N.V.; LG Electronics Inc.; Matsushita Electric Industrial Co., Ltd.; Microsoft Corporation; Mitsubishi Electric Corporation; Robert Bosch GmbH; Samsung Electronics Co., Ltd.; Sedna Patent Services, LLC; Sharp Kabushiki Kaisha; Siemens AG; Sony Corporation; The Trustees of Columbia University in the City of New York; Toshiba Corporation; and Victor Company of Japan, Limited. MPEG LA's objective is to provide worldwide access to as much AVC essential intellectual property as possible for the benefit of AVC users. Therefore, any party that believes it has essential patents is welcome to submit them for evaluation of their essentiality and inclusion in the License if found essential.

  4. AVC/H.264 patent portfolio license

    NASA Astrophysics Data System (ADS)

    Horn, Lawrence A.

    2004-11-01

    MPEG LA, LLC recently announced terms of a joint patent license for the AVC (a/k/a H.264) Standard (ISO/IEC IS 14496-10: Information technology -- Coding of audio-visual objects -- Part 10: Advanced Video Coding | ITU-T Rec. H.264: Series H: Audiovisual and Multimedia Systems: Infrastructure of audiovisual services -- Coding of moving video: Advanced video coding for generic audiovisual services). Like MPEG LA"s other licenses, the AVC Patent Portfolio License is offered for the convenience of the marketplace as an alternative enabling users to access essential intellectual property owned by many patent holders under a single license rather than negotiating licenses with each of them individually. The AVC Patent Portfolio License includes essential patents owned by Columbia Innovation Enterprises; Electronics and Telecommunications Research Institute (ETRI); France Télécom, société anonyme; Fujitsu Limited; Koninklijke Philips Electronics N.V.; Matsushita Electric Industrial Co., Ltd.; Microsoft Corporation; Mitsubishi Electric Corporation; Robert Bosch GmbH; Samsung Electronics Co., Ltd.; Sharp Kabushiki Kaisha; Sony Corporation; Toshiba Corporation; and Victor Company of Japan, Limited. MPEG LA"s objective is to provide worldwide access to as much AVC essential intellectual property as possible for the benefit of AVC users. Therefore, any party that believes it has essential patents is welcome to submit them for evaluation of their essentiality and inclusion in the License if found essential.

  5. AVC/H.264 patent portfolio license

    NASA Astrophysics Data System (ADS)

    Skandalis, Dean A.

    2006-08-01

    MPEG LA, LLC offers a joint patent license for the AVC (a/k/a H.264) Standard (ISO/IEC IS 14496-10:2004). Like MPEG LA's other licenses, the AVC Patent Portfolio License is offered for the convenience of the marketplace as an alternative enabling users to access essential intellectual property owned by many patent holders under a single license rather than negotiating licenses with each of them individually. The AVC Patent Portfolio License includes essential patents owned by DAEWOO Electronics Corporation; Electronics and Telecommunications Research Institute (ETRI); France Telecom, societe anonyme; Fujitsu Limited; Hitachi, Ltd.; Koninklijke Philips Electronics N.V.; LG Electronics Inc.; Matsushita Electric Industrial Co., Ltd.; Microsoft Corporation; Mitsubishi Electric Corporation; Robert Bosch GmbH; Samsung Electronics Co., Ltd.; Sedna Patent Services, LLC; Sharp Kabushiki Kaisha; Siemens AG; Sony Corporation; The Trustees of Columbia University in the City of New York; Toshiba Corporation; UB Video Inc.; and Victor Company of Japan, Limited. Another is expected also to join as of August 1, 2006. MPEG LA's objective is to provide worldwide access to as much AVC essential intellectual property as possible for the benefit of AVC users. Therefore, any party that believes it has essential patents is welcome to submit them for evaluation of their essentiality and inclusion in the License if found essential.

  6. Thoughts from the Greenhouse

    ERIC Educational Resources Information Center

    Sonstrom, Wendy Jean

    2006-01-01

    In this article, the author compares the functions of a graduate adult education program and a greenhouse. A graduate adult education program is a place where, like in a greenhouse, exciting new hybrids can be developed--working with people outside the school of education, in different disciplines and beyond the university's walls, sharing what…

  7. Thoughts from the Greenhouse

    ERIC Educational Resources Information Center

    Sonstrom, Wendy Jean

    2006-01-01

    In this article, the author compares the functions of a graduate adult education program and a greenhouse. A graduate adult education program is a place where, like in a greenhouse, exciting new hybrids can be developed--working with people outside the school of education, in different disciplines and beyond the university's walls, sharing what…

  8. Reservoir Greenhouse Gas Emissions at Russian HPP

    SciTech Connect

    Fedorov, M. P.; Elistratov, V. V.; Maslikov, V. I.; Sidorenko, G. I.; Chusov, A. N.; Atrashenok, V. P.; Molodtsov, D. V.; Savvichev, A. S.; Zinchenko, A. V.

    2015-05-15

    Studies of greenhouse-gas emissions from the surfaces of the world’s reservoirs, which has demonstrated ambiguity of assessments of the effect of reservoirs on greenhouse-gas emissions to the atmosphere, is analyzed. It is recommended that greenhouse- gas emissions from various reservoirs be assessed by the procedure “GHG Measurement Guidelines for Fresh Water Reservoirs” (2010) for the purpose of creating a data base with results of standardized measurements. Aprogram for research into greenhouse-gas emissions is being developed at the St. Petersburg Polytechnic University in conformity with the IHA procedure at the reservoirs impounded by the Sayano-Shushenskaya and Mainskaya HPP operated by the RusHydro Co.

  9. Utility supply portfolio diversity requirements

    SciTech Connect

    Hanser, Philip; Graves, Frank

    2007-06-15

    In general, diversification for its own sake by utilities is likely to come at significant cost from ignoring or having to overcome engineering reasons for preferring a less diversified portfolio of resources. Integrated utilities, distcos and merchant gencos are likely to pursue widely divergent strategies in this regard. (author)

  10. Supply contract and portfolio insurance

    Treesearch

    Runsheng Yin; Bob Izlar

    2001-01-01

    The long-term growth of institutional timberland investments depends on the ability of timberland investment management organizations (TIMO) to deal effectively with securitization, leveraging, arbitraging, supply contracting, portfolio insurance, tax efficiency enhancement, and other issues. Financial engineering holds great promise for many of these issues. This...

  11. Teaching Sociology through Student Portfolios

    ERIC Educational Resources Information Center

    Trepagnier, Barbara

    2004-01-01

    After several years of teaching Sociological Thought--an upper division course that focuses on classical, modern, and contemporary sociological theories--the author came across the idea of student portfolios. As a consequence, the course has undergone far-reaching changes. The content remains relatively intact; however, today the theory course…

  12. Assessing Job Readiness through Portfolios.

    ERIC Educational Resources Information Center

    Smith, Catherine B.

    1993-01-01

    A 1987 task force working on Michigan's Employability Skills Assessment Project recommended a portfolio approach to help students develop teamwork, personal management, and workforce readiness skills. Michigan's plan offers a chance for schools to integrate experiences in students' lives with school learning. Judith Schaftenaar's sidebar presents…

  13. [New portfolio, a users' manual].

    PubMed

    Cougnoux, Nadège; Deken, Éric; Juif, Isabelle; Papas, Anne

    2015-10-01

    The portfolio, a tool for monitoring nursing students throughout their internship period, has now been modified. The new 2015 version can be used to monitor and trace the student's career as well as progress made. One of the major new points is the integration of an intermediate internship assessment.

  14. Portfolio Development: Enhancing Professional Intelligence.

    ERIC Educational Resources Information Center

    Lasley, Thomas J.; Tillman, Beverly

    This paper provides examples of how portfolios are used at the University of Dayton (Ohio) in an introductory course titled "The Profession of Teaching" to enhance the interpersonal, intrapersonal, musical, linguistic, and spatial intelligence of preservice teachers. For example, students can include audiotapes of their experiences,…

  15. Portfolio Careerism: Are You Ready?

    ERIC Educational Resources Information Center

    Stevens, Paul

    A career is a discontinuous a series of work roles using different personal attributes, skills, knowledge, interests, and wants. Individuals must examine their portfolio, select and rearrange it, and then sell themselves to the manager where they work or prospective clients/employers in the marketplace. Individuals should view career capabilities…

  16. Integrating Video in Electronic Portfolios

    ERIC Educational Resources Information Center

    Walker, Victoria Lynn

    2004-01-01

    Finding the right candidates for positions is a difficult task for employers. For job applicants obtaining the best positions available can also be challenging. One problem is the inherent weakness of one page cover letters, two page resumes, or short portfolios to present an applicant's talents thoroughly. One successful method of displaying a…

  17. Robust Portfolio Optimization Using Pseudodistances

    PubMed Central

    2015-01-01

    The presence of outliers in financial asset returns is a frequently occurring phenomenon which may lead to unreliable mean-variance optimized portfolios. This fact is due to the unbounded influence that outliers can have on the mean returns and covariance estimators that are inputs in the optimization procedure. In this paper we present robust estimators of mean and covariance matrix obtained by minimizing an empirical version of a pseudodistance between the assumed model and the true model underlying the data. We prove and discuss theoretical properties of these estimators, such as affine equivariance, B-robustness, asymptotic normality and asymptotic relative efficiency. These estimators can be easily used in place of the classical estimators, thereby providing robust optimized portfolios. A Monte Carlo simulation study and applications to real data show the advantages of the proposed approach. We study both in-sample and out-of-sample performance of the proposed robust portfolios comparing them with some other portfolios known in literature. PMID:26468948

  18. Portfolios and Self-Assessment.

    ERIC Educational Resources Information Center

    Ballard, Leslie

    1992-01-01

    Outlines an assignment in which a teacher used portfolios as the basis for a final examination to give students a chance to assess their own writing and their progress. Discusses the success of the assignment and the teacher's surprise at the students' insight into their own strengths and weaknesses. (PRA)

  19. Greenhouse Gas Analysis by GC/MS

    NASA Astrophysics Data System (ADS)

    Bock, E. M.; Easton, Z. M.; Macek, P.

    2015-12-01

    Current methods to analyze greenhouse gases rely on designated complex, multiple-column, multiple-detector gas chromatographs. A novel method was developed in partnership with Shimadzu for simultaneous quantification of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) in environmental gas samples. Gas bulbs were used to make custom standard mixtures by injecting small volumes of pure analyte into the nitrogen-filled bulb. Resulting calibration curves were validated using a certified gas standard. The use of GC/MS systems to perform this analysis has the potential to move the analysis of greenhouse gasses from expensive, custom GC systems to standard single-quadrupole GC/MS systems that are available in most laboratories, which wide variety of applications beyond greenhouse gas analysis. Additionally, use of mass spectrometry can provide confirmation of identity of target analytes, and will assist in the identification of unknown peaks should they be present in the chromatogram.

  20. Portfolios for assessment of paediatric specialist registrars.

    PubMed

    Melville, C; Rees, M; Brookfield, D; Anderson, J

    2004-10-01

    In 1997 the Royal College of Paediatrics and Child Health introduced portfolios to guide and monitor the learning of specialist registrars. We studied their value for assessment. Using Bigg's SOLO criteria we devised a marking scheme based on 6 domains of competence: clinical, communication, teaching and learning, ethics and attitudes, management and evaluation, and creation of evidence. We rated portfolios according to quality of evidence presented and expectations by year of training. We similarly assessed trainee performance in the annual record of in-training assessment (RITA) interview. Specific advice based on the results of the first portfolio assessments was circulated to all trainees, instructing them to increase the structure and decrease the bulk of portfolios. A second sample of portfolios was reviewed a year later, using similar evaluations, to determine the effects. A total of 76 portfolios were assessed in year 1 by a single rater; 30 portfolios were assessed in year 2 by 2 independent raters. The quality of documentation improved from year 1 to year 2 but there was no significant increase in portfolio scores. The inter-rater correlation coefficient of the portfolio assessment method was 0.52 (Cohen's kappa 0.35). The inter-rater correlation coefficient of the RITA interview was 0.71 (Cohen's kappa 0.38). There was moderate inter-assessment correlation between portfolios and RITA interviews (kappa 0.26 in year 1 and 0.29 in year 2). Generalisability analysis suggested that 5 successive ratings by a single observer or independent ratings by 4 observers on the same occasion would be needed to yield a generalisability coefficient > 0.8 for overall portfolio rating. This method of portfolio assessment is insufficiently reliable as a sole method for high stakes, single-instance assessment, but has a place as part of a triangulation process. Repeated portfolio assessment by paired observers would increase reliability. Longer term studies are required to

  1. Feasibility and Outcomes of Implementing a Portfolio Assessment System Alongside a Traditional Grading System.

    PubMed

    O'Brien, Celia Laird; Sanguino, Sandra M; Thomas, John X; Green, Marianne M

    2016-11-01

    Portfolios are a powerful tool to collect and evaluate evidence of medical students' competence across time. However, comprehensive portfolio assessment systems that are implemented alongside traditional graded curricula at medical schools in the United States have not been described in the literature. This study describes the development and implementation of a longitudinal competency-based electronic portfolio system alongside a graded curriculum at a relatively large U.S. medical school. In 2009, the authors developed a portfolio system that served as a repository for all student assessments organized by competency domain. Five competencies were selected for a preclerkship summative portfolio review. Students submitted reflections on their performance. In 2014, four clinical faculty members participated in standard-setting activities and used expert judgment and holistic review to rate students' competency achievement as "progressing toward competence," "progressing toward competence with some concern," or "progressing toward competence pending remediation." Follow-up surveys measured students' and faculty members' perceptions of the process. Faculty evaluated 156 portfolios and showed high levels of agreement in their ratings. The majority of students achieved the "progressing toward competence" benchmark in all competency areas. However, 31 students received at least one concerning rating, which was not reflected in their course grades. Students' perceptions of the system's ability to foster self-assessment were mixed. The portfolio review process allowed faculty to identify students with a concerning rating in a behavioral competency who would not have been identified in a traditional grading system. Identification of these students allows for intervention and early remediation.

  2. Passive-solar greenhouse

    SciTech Connect

    Not Available

    1982-01-01

    Our project objective was to design, construct, and operate a commercialized (16' x 50') passive, solar greenhouse. The structure was originally intended as a vegetable forcing facility to produce vegetable crops in the off-season. Building and size constraints and economic considerations convinced us to use the greenhouse for producing bedding plants and vegetable starts in the spring, high value vegetables (tomatoes, cucumbers) in the fall and forced bulbs in the winter. This crop sequence allows us to use the greenhouse all year without additional heat as the crops are adopted to the temperature regime of the greenhouse during each particular season. In our first season, the greenhouse performed beautifully. The lowest temperature recorded was 38/sup 0/F after 4 cold, cloudy days in February. The production of bedding plants has allowed us to diversify our products and the early transplants we produced were a great asset to our vegetable farming operation. Although construction cost (4.57 sq. ft.) is higher than that of a conventional polyethylene-covered, quonset-type greenhouse (approx. $1.92 sq. ft.), our annual operating cost is cheaper than that of a conventional greenhouse (0.49 cents sq. ft. versus 0.67 cents sq. ft.) due to a longer usable lifetime of the structure and the elimination of heating costs. Our structure has been toured by interested individuals, school and farm groups. We plan to publicize the structure and its advantages by promoting more visits to the site.

  3. Using Teaching Portfolios To Improve and Assess Teaching.

    ERIC Educational Resources Information Center

    Shackelford, Ray

    This paper seeks to answer three basic questions related to the use of teaching portfolios in faculty evaluation and development: (1) "What is a teaching portfolio?"; (2) "How can the teaching portfolio be used to document and facilitate teaching?"; and (3) "How can teaching portfolios be assessed?" The teaching portfolio is seen as encouraging…

  4. Portfolios Here, Portfolios There...Searching for the Essence of "Educational Portfolios."

    ERIC Educational Resources Information Center

    LaBoskey, Vicki Kubler

    2000-01-01

    Educational portfolios can happen, even within extremely incompatible organizational structures. When designed in accordance with four principles (opportunities for meaning-making, interactions with people who matter, assemblage over an extended period, and a supportive presentation context) these projects can be transformative and profoundly…

  5. Portfolios Here, Portfolios There...Searching for the Essence of "Educational Portfolios."

    ERIC Educational Resources Information Center

    LaBoskey, Vicki Kubler

    2000-01-01

    Educational portfolios can happen, even within extremely incompatible organizational structures. When designed in accordance with four principles (opportunities for meaning-making, interactions with people who matter, assemblage over an extended period, and a supportive presentation context) these projects can be transformative and profoundly…

  6. Enhancing reliability in portfolio assessment: 'shaping' the portfolio.

    PubMed

    Pitts, John; Coles, Colin; Thomas, Peter

    2001-07-01

    This paper reports a follow-on project that assessed a series of portfolios assembled by a cohort of participants attending a course for prospective general practice trainers. In an attempt to enhance reliability, a framework for defining and addressing problems using a reflective practice model was offered to participants. The reliability of the judgements made by a panel of assessors about individual 'components', together with an overall global judgement about performance were studied. The reliability of individual assessors' judgements (i.e. their consistency) was moderate, but inter-rater reliability did not reach a level that could support making a safe summative judgement. Despite offering a possible structure for demonstrating reflective processes, the levels of reliability reached were similar to the earlier work and other subjective assessments generally, and perhaps reflected individuality of personal agendas of both the assessed and the assessors, and variations in portfolio structure and content; even agreement among the assessors about evidence of the framework being used was poor. Suggestions for approaches in the future are made. The conclusion remains that while portfolios might be valuable as resources for learning, as assessment tools they should be treated as problematic.

  7. Automatic Trading Agent. RMT Based Portfolio Theory and Portfolio Selection

    NASA Astrophysics Data System (ADS)

    Snarska, M.; Krzych, J.

    2006-11-01

    Portfolio theory is a very powerful tool in the modern investment theory. It is helpful in estimating risk of an investor's portfolio, arosen from lack of information, uncertainty and incomplete knowledge of reality, which forbids a perfect prediction of future price changes. Despite of many advantages this tool is not known and not widely used among investors on Warsaw Stock Exchange. The main reason for abandoning this method is a high level of complexity and immense calculations. The aim of this paper is to introduce an automatic decision-making system, which allows a single investor to use complex methods of Modern Portfolio Theory (MPT). The key tool in MPT is an analysis of an empirical covariance matrix. This matrix, obtained from historical data, biased by such a high amount of statistical uncertainty, that it can be seen as random. By bringing into practice the ideas of Random Matrix Theory (RMT), the noise is removed or significantly reduced, so the future risk and return are better estimated and controlled. These concepts are applied to the Warsaw Stock Exchange Simulator {http://gra.onet.pl}. The result of the simulation is 18% level of gains in comparison with respective 10% loss of the Warsaw Stock Exchange main index WIG.

  8. Reliability of Portfolio: A Closer Look at Findings from Recent Publications

    ERIC Educational Resources Information Center

    Oskay, Ozge Ozyalcin; Schallies, Michael; Morgil, Inci

    2008-01-01

    In this review article, conventional portfolio assessment and new developments in portfolio assessment are investigated. The concept of portfolio, portfolio building steps, contents of portfolio, evaluation of portfolio, advantages, disadvantages and concerns in using portfolio as well as validity and reliability of portfolio assessment are…

  9. Reliability of Portfolio: A Closer Look at Findings from Recent Publications

    ERIC Educational Resources Information Center

    Oskay, Ozge Ozyalcin; Schallies, Michael; Morgil, Inci

    2008-01-01

    In this review article, conventional portfolio assessment and new developments in portfolio assessment are investigated. The concept of portfolio, portfolio building steps, contents of portfolio, evaluation of portfolio, advantages, disadvantages and concerns in using portfolio as well as validity and reliability of portfolio assessment are…

  10. Fort Yukon Greenhouse Project

    EPA Pesticide Factsheets

    The Tanana Chiefs Conference is an EPA Climate Showcase Community. EPA’s Climate Showcase Communities Program helps local governments and tribal nations pilot innovative, cost-effective and replicable community-based greenhouse gas reduction projects.

  11. Technology Opportunities to Reduce U.S. Greenhouse Gas Emissions

    SciTech Connect

    Pena, Federico

    1997-10-01

    This report serves as the technology basis of a needed national climate change technology strategy, with the confidence that a strong technology R&D program will deliver a portfolio of technologies with the potential to provide very substantial greenhouse gas emission reductions along with continued economic growth. Much more is needed to define such a strategy, including identification of complementary deployment policies and analysis to support the seeping and prioritization of R&D programs. A national strategy must be based upon governmental, industrial, and academic partnerships.

  12. Solar greenhouses in Minnesota

    SciTech Connect

    Polich, M.

    1981-12-01

    After a discussion of solar greenhouse phenomena and the potential for heat collection and food production, design recommendations are provided for attached heat collecting solar sunspaces and for attached food producing solar greenhouses. Also, design of a single solar structure to maximize heat collection and food production is considered. A method of predicting the performance for attached heat collecting solar sunspaces is given in which the solar savings fraction is calculated. (LEW)

  13. Exploring Vietnam: A Multiple Intelligence Portfolio of Learning.

    ERIC Educational Resources Information Center

    Hoover, Linda A.; Taylor, Randall

    1998-01-01

    Provides guidelines for implementing portfolios in the social studies classroom that focus on the Vietnam era and incorporate Howard Gardner's multiple intelligences. Outlines the portfolio project, lists eleven portfolio components, and addresses the intelligence of each. (CMK)

  14. Operating and Maintaining the Greenhouse.

    ERIC Educational Resources Information Center

    Gresser, Priscilla A.

    This learning guide is designed to assist vocational agriculture students in mastering 20 tasks involved in the operation and maintenance of a greenhouse. Addressed in the individual sections of the guide are the following topics: identification of greenhouse designs, greenhouse construction, basic greenhouse maintenance to conserve energy,…

  15. Portfolio-based learning and assessment.

    PubMed

    Joshi, Mohit Kumar; Gupta, Piyush; Singh, Tejinder

    2015-03-08

    Assessment using portfolios has recently gained wider acceptance, and is being considered relevant to several educational aspects in medicine, including formative and summative assessment during resident training, revalidation and continuing professional development. In this article, we provide an overview of the use of portfolio as an assessment and learning tool. We have discussed the rationale of using portfolio in medical education, its advantages and criticisms, and some of the associated challenges and dilemmas.

  16. Evaluation of an established learning portfolio.

    PubMed

    Vance, Gillian; Williamson, Alyson; Frearson, Richard; O'Connor, Nicole; Davison, John; Steele, Craig; Burford, Bryan

    2013-02-01

    The trainee-held learning portfolio is integral to the foundation programme in the UK. In the Northern Deanery, portfolio assessment is standardised through the Annual Review of Competence Progression (ARCP) process. In this study we aimed to establish how current trainees evaluate portfolio-based learning and ARCP, and how these attitudes may have changed since the foundation programme was first introduced. Deanery-wide trainee attitudes were surveyed by an electronic questionnaire in 2009 and compared with perceptions recorded during the pilot phase (2004-2005).  Many trainees continue to view the e-portfolio negatively. Indeed, significantly fewer trainees in 2009 thought that the e-portfolio was a 'good idea' or a 'worthwhile investment of time' than in 2005. Trainees remain unconvinced about the educational value of the e-portfolio: fewer trainees in 2009 regarded it as a tool that might help focus on training or recognise individual strengths and weaknesses. Issues around unnecessary bureaucracy persist. Current trainees tend to understand how to use the e-portfolio, but many did not know how much, or what evidence to collect. Few supervisors were reported to provide useful guidance on the portfolio. ARCP encouraged portfolio completion but did not give meaningful feedback to drive future learning.   Continued support is needed for both trainees and supervisors in portfolio-building skills and in using the e-portfolio as an educational tool. Trainee-tailored feedback is needed to ensure that portfolio-based assessment promotes lifelong, self-directed and reflective learners. © Blackwell Publishing Ltd 2013.

  17. Learning portfolios: giving meaning to practice.

    PubMed

    Cangelosi, Pamela R

    2008-01-01

    Learning portfolios are gaining acceptance in nursing education as a viable way to individualize student learning and evaluate outcomes. Traditionally, portfolios have documented learning that has already occurred. This article describes how the design of a learning portfolio for nurse educator students provided greater insight into their new practice of teaching by assisting in both the reflection of their previous experiences and the visualization of their first teaching position.

  18. Experiencing the Portfolio Process during the Internship: A Comparative Analysis of Two PETE Portfolio Models.

    ERIC Educational Resources Information Center

    Senne, Terry A.; Rikard, G. Linda

    2002-01-01

    Analyzed two physical education teacher education portfolio models regarding the impact on intern perceptions of the value of portfolios, intern professional growth, and portfolio representation in single and dual internship site placements. Data from surveys and reflection logs indicated that although interns showed no change in moral judgement…

  19. From an e-Portfolio Model to e-Portfolio Practices: Some Guidelines

    ERIC Educational Resources Information Center

    Rossi, Pier Giuseppe; Magnoler, Patrizia; Giannandrea, Lorella

    2008-01-01

    Purpose: An e-portfolio is a useful tool to increase reflection and awareness in teachers and students. However, benefits of e-portfolio use are weakened by difficulties due to the lack of motivation, the heavy weight of creation and revision of the e-portfolios, the rigid tool structure. The paper aims to answer these emerging issues, showing how…

  20. The Germination of Several Tree Species in Plastic Greenhouses

    Treesearch

    Howard M. Phipps

    1969-01-01

    The technique of growing tree seedlings in plastic greenhouses is being evaluated for red pine, jack pine, white spruce, and yellow birch at the Chittenden Nursery in northern Lower Michigan. Both a long growing season and a normal-length growing season in plastic greenhouses were compared with standard outdoor nursery beds (control). First-year results showed that...

  1. Portfolio selection and asset pricing under a benchmark approach

    NASA Astrophysics Data System (ADS)

    Platen, Eckhard

    2006-10-01

    The paper presents classical and new results on portfolio optimization, as well as the fair pricing concept for derivative pricing under the benchmark approach. The growth optimal portfolio is shown to be a central object in a market model. It links asset pricing and portfolio optimization. The paper argues that the market portfolio is a proxy of the growth optimal portfolio. By choosing the drift of the discounted growth optimal portfolio as parameter process, one obtains a realistic theoretical market dynamics.

  2. Development of a web database portfolio system with PACS connectivity for undergraduate health education and continuing professional development.

    PubMed

    Ng, Curtise K C; White, Peter; McKay, Janice C

    2009-04-01

    Increasingly, the use of web database portfolio systems is noted in medical and health education, and for continuing professional development (CPD). However, the functions of existing systems are not always aligned with the corresponding pedagogy and hence reflection is often lost. This paper presents the development of a tailored web database portfolio system with Picture Archiving and Communication System (PACS) connectivity, which is based on the portfolio pedagogy. Following a pre-determined portfolio framework, a system model with the components of web, database and mail servers, server side scripts, and a Query/Retrieve (Q/R) broker for conversion between Hypertext Transfer Protocol (HTTP) requests and Q/R service class of Digital Imaging and Communication in Medicine (DICOM) standard, is proposed. The system was piloted with seventy-seven volunteers. A tailored web database portfolio system (http://radep.hti.polyu.edu.hk) was developed. Technological arrangements for reinforcing portfolio pedagogy include popup windows (reminders) with guidelines and probing questions of 'collect', 'select' and 'reflect' on evidence of development/experience, limitation in the number of files (evidence) to be uploaded, the 'Evidence Insertion' functionality to link the individual uploaded artifacts with reflective writing, capability to accommodate diversity of contents and convenient interfaces for reviewing portfolios and communication. Evidence to date suggests the system supports users to build their portfolios with sound hypertext reflection under a facilitator's guidance, and with reviewers to monitor students' progress providing feedback and comments online in a programme-wide situation.

  3. Academic portfolio in the digital era: organizing and maintaining a portfolio using reference managers.

    PubMed

    Bhargava, Puneet; Patel, Vatsal B; Iyer, Ramesh S; Moshiri, Mariam; Robinson, Tracy J; Lall, Chandana; Heller, Matthew T

    2015-02-01

    The academic portfolio has become an integral part of the promotions process. Creating and maintaining an academic portfolio in paper-based or web-based formats can be a cumbersome and time-consuming task. In this article, we describe an alternative way to efficiently organize an academic portfolio using a reference manager software, and discuss some of the afforded advantages. The reference manager software Papers (Mekentosj, Amsterdam, The Netherlands) was used to create an academic portfolio. The article outlines the key steps in creating and maintaining a digital academic portfolio. Using reference manager software (Papers), we created an academic portfolio that allows the user to digitally organize clinical, teaching, and research accomplishments in an indexed library enabling efficient updating, rapid retrieval, and easy sharing. To our knowledge, this is the first digital portfolio of its kind.

  4. Student Portfolios: A Collection of Articles.

    ERIC Educational Resources Information Center

    Fogarty, Robin, Ed.

    More and more, schools are looking to student portfolios as a valid, reliable, and authentic form of assessment. This collection offers practical, well-researched answers to a variety of philosophical, organizational, and implementational questions surrounding portfolio assessment. Articles in the first section provide a rationale for student…

  5. Portfolio Assessment: Direct from the Classroom

    ERIC Educational Resources Information Center

    McDonald, Betty

    2012-01-01

    Portfolios have been regarded as a means of personal self-expression. This study reports on student real-life experiences with portfolio assessment. The focus group comprised 150 freshmen (100 females) from a small campus of a tertiary educational institution. For two semesters (approximately 30 weeks), students engaged in numerous activities…

  6. The Benefits of Developing a Professional Portfolio

    ERIC Educational Resources Information Center

    Priest, Cheryl

    2010-01-01

    The author's years of work with preservice early childhood teachers, new professionals, and organizations that recruit beginning professionals have helped her identify key activities and documents to be incorporated into a professional portfolio. A well-organized portfolio can help newer practitioners effectively express their beliefs and…

  7. Career Portfolios. Practice Application Brief No. 13.

    ERIC Educational Resources Information Center

    Wonacott, Michael E.

    Career portfolios contain evidence of individuals' knowledge and skills and are useful tools in job search and career change, especially now that employers want generalizable workplace skills not well portrayed by traditional means and students are often inept at communicating their skills and knowledge to employers. Career portfolios contain and…

  8. Portfolio Assessment Handbook. 1990-91.

    ERIC Educational Resources Information Center

    Thomas A. Edison State Coll., Trenton, NJ.

    This handbook gives the adult student information to complete portfolios that are designed to help adult students earn college credits for outside experience. Portfolio assessment is a flexible and efficient way to earn college credit. Nearly any area of learning can be converted into credits as long as it is taught at a regionally accredited…

  9. Optimization of the bank's operating portfolio

    NASA Astrophysics Data System (ADS)

    Borodachev, S. M.; Medvedev, M. A.

    2016-06-01

    The theory of efficient portfolios developed by Markowitz is used to optimize the structure of the types of financial operations of a bank (bank portfolio) in order to increase the profit and reduce the risk. The focus of this paper is to check the stability of the model to errors in the original data.

  10. Integrating Web Portfolios into the Learning Process

    ERIC Educational Resources Information Center

    D'Ambrosio, Jay

    2004-01-01

    Web portfolios should be integrated in the learning process as they encourage the students to take an active interest in their own learning and highlights the individual students, their interests and their goals, increases student motivation and provides an excellent method for teaching students. Implementation of Web portfolios could be made more…

  11. On the Teaching of Portfolio Theory.

    ERIC Educational Resources Information Center

    Biederman, Daniel K.

    1992-01-01

    Demonstrates how a simple portfolio problem expressed explicitly as an expected utility maximization problem can be used to instruct students in portfolio theory. Discusses risk aversion, decision making under uncertainty, and the limitations of the traditional mean variance approach. Suggests students may develop a greater appreciation of general…

  12. A Professional Practice Portfolio for Quality Learning

    ERIC Educational Resources Information Center

    Jones, Elizabeth

    2010-01-01

    This article focuses on the extent to which a portfolio may address the challenges of assessment for quality learning in professional education programmes. A four-year action research study investigated the development and implementation of a portfolio for the assessment of practice in a professional development programme preparing special…

  13. Universal data compression and portfolio selection

    SciTech Connect

    Cover, T.M.

    1996-12-31

    We consider universal data compression, universal portfolio selection (online portfolio algorithms) and the relationship of both to information theory. Apparently the fundamental minimax redundancy game in data compression and the minimax regret game for the growth rate of wealth in investment have the same answer. There is also a duality between entropy rate and the growth rate of wealth.

  14. The Portfolio as Artifact and Actor

    ERIC Educational Resources Information Center

    Habib, Laurence; Wittek, Line

    2007-01-01

    This article proposes a tentative framework to support empirical analysis of portfolios as pedagogical tools for formative and summative assessment in higher education. It aims to get a deeper understanding of the role of the portfolio in student learning both as a tool and as representations of this tool. To that end, we use three sets of…

  15. SunShot Initiative Portfolio Book 2014

    SciTech Connect

    Solar Energy Technologies Office

    2014-05-01

    The 2014 SunShot Initiative Portfolio Book outlines the progress towards the goals outlined in the SunShot Vision Study. Contents include overviews of each of SunShot’s five subprogram areas, as well as a description of every active project in the SunShot’s project portfolio as of May 2014.

  16. ePortfolios Meet Social Software

    ERIC Educational Resources Information Center

    Waters, John K.

    2007-01-01

    Although a seemingly good idea, electronic portfolios have to date failed to gain significant traction in higher education. Institutions with ePortfolio implementations routinely report high numbers of accounts on their campuses, but few believe that those numbers are a meaningful reflection of actual usage. Change is in the air for the…

  17. Using E-Portfolios and ESL Learners

    ERIC Educational Resources Information Center

    Alawdat, Maha

    2013-01-01

    This study examines the use of e-portfolios for ESL (English as a second language) learners. The data were collected by reviewing 11 empirical studies from 2010-2012 in order to synthesize meaningful information about e-portfolios for ESL/EFL (English as a foreign language) acquisition. The studies were coded into two main categories: learning…

  18. e-Portfolios in Music Teacher Education

    ERIC Educational Resources Information Center

    Lind, Vicki

    2007-01-01

    In this article Vicki Lind reports the findings of a case study investigation of the use of electronic portfolios in a music education program. The project focused specifically on the use of electronic portfolios as a tool to document the work of preservice teachers as they prepared for the teaching profession. Two research questions framed this…

  19. A Portfolio Approach to Outcomes Assessment.

    ERIC Educational Resources Information Center

    Ruholl, Linda Hatke

    2000-01-01

    Describes an outcomes assessment plan developed by the Lake Land College (Illinois) nursing program, which is organized around formative and summative evaluations of twelve graduate program outcomes. Quantitative and qualitative data collected by students are submitted in a portfolio format. The faculty tool for assessing the portfolios is…

  20. Splashy Portfolios Kids Can Make Themselves.

    ERIC Educational Resources Information Center

    Booth, Virginia Humphreys

    1994-01-01

    A children's art project lets students create artistic portfolios in a Jackson Pollock style. The activity takes 60 minutes and requires posterboard, adhesive tape, spray paint, tempera paints, eyedroppers, newspapers, colored markers, and stencil letters. By inviting students to make their own portfolios, teachers are cultivating students'…

  1. [Role of the portfolio in skills assessment].

    PubMed

    Berrahou, Zoulika; Roumanet, Marie-Cécile

    2013-05-01

    The portfolio is used in monitoring the student's pathway and in his or her assessment, a fundamental tool for the acquisition of skills. Chambéry hospital has created a tutoring training course and teams from the hospital and nurse training institute work closely together on the portfolio, the essential requirements and the assessment of students' practice during work placements.

  2. Reflection during Portfolio-Based Conversations

    ERIC Educational Resources Information Center

    Oosterbaan, Anne E.; van der Schaaf, Marieke F.; Baartman, Liesbeth K. J.; Stokking, Karel M.

    2010-01-01

    This study aims to explore the relationship between the occurrence of reflection (and non-reflection) and thinking activities (e.g., orientating, selecting, analysing) during portfolio-based conversations. Analysis of 21 transcripts of portfolio-based conversations revealed that 20% of the segments were made up of reflection (content reflection…

  3. Unlocking ePortfolio Practice: Teaching Beliefs

    ERIC Educational Resources Information Center

    Henscheid, Jean M.; Brown, Gary; Gordon, Aifang; Chen, Helen L.

    2014-01-01

    The Association for Authentic, Experiential, and Evidence-Based Learning (AAEEBL) annual ePortfolio survey focuses on understanding ePortfolio practitioners' teaching beliefs and practices. The action research reported here extends that survey research to a population of emerging educators (i.e., graduate students in education). In addition to…

  4. The Use of Portfolios in Leadership Education

    ERIC Educational Resources Information Center

    Olsen, Paul E.

    2009-01-01

    This paper discusses the benefits of using student portfolios in undergraduate leadership education at Saint Michael's College. There appears to be a natural link between the use of portfolios as a tool to facilitate and document leadership growth and development. The Business Administration and Accounting Department at Saint Michael's College…

  5. 17 CFR 23.502 - Portfolio reconciliation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... DEALERS AND MAJOR SWAP PARTICIPANTS Swap Documentation § 23.502 Portfolio reconciliation. (a) Swaps with swap dealers or major swap participants. Each swap dealer and major swap participant shall engage in portfolio reconciliation as follows for all swaps in which its counterparty is also a swap dealer or major...

  6. Assessing Teacher Competencies with the Audiovisual Portfolio.

    ERIC Educational Resources Information Center

    Williams, Eugene

    1979-01-01

    The audiovisual portfolio helps beginning teachers demonstrate qualities that might not show up in a traditional job interview. Included in the portfolio are a student teaching notebook, a slide narrative presentation, audiocassette tapes, and a videotape of lessons taught during student teaching. (Author)

  7. IT Portfolio Selection and IT Synergy

    ERIC Educational Resources Information Center

    Cho, Woo Je

    2010-01-01

    This dissertation consists of three chapters. The primary objectives of this dissertation are: (1) to provide a methodological framework of IT (Information Technology) portfolio management, and (2) to identify the effect of IT synergy on IT portfolio selection of a firm. The first chapter presents a methodological framework for IT project…

  8. Financial News Analysis for Intelligent Portfolio Management

    DTIC Science & Technology

    2004-01-01

    In this paper, we presentWarren, a multi - agent system for intelligent portfolio management which is motivated by the great benefits of working in...between agents, and the supplementing of quantitative information by financial news analysis, we showed a successful application of a multi - agent system for portfolio management.

  9. A Professional Practice Portfolio for Quality Learning

    ERIC Educational Resources Information Center

    Jones, Elizabeth

    2010-01-01

    This article focuses on the extent to which a portfolio may address the challenges of assessment for quality learning in professional education programmes. A four-year action research study investigated the development and implementation of a portfolio for the assessment of practice in a professional development programme preparing special…

  10. Digital Portfolio Production Among Preservice Secondary Teachers.

    ERIC Educational Resources Information Center

    Lennex, Lesia C.

    This article describes the processes used to create and complete a digital portfolio during a 12-week student teaching experience at Morehead State University. This pilot study took place during the 1996-1997 school year. The study examined perceptions of digital portfolios among a group of 16 preservice secondary teachers. Study objectives…

  11. A Portfolio Approach to Outcomes Assessment.

    ERIC Educational Resources Information Center

    Ruholl, Linda Hatke

    2000-01-01

    Describes an outcomes assessment plan developed by the Lake Land College (Illinois) nursing program, which is organized around formative and summative evaluations of twelve graduate program outcomes. Quantitative and qualitative data collected by students are submitted in a portfolio format. The faculty tool for assessing the portfolios is…

  12. Digital Career Portfolios: Expanding Institutional Opportunities

    ERIC Educational Resources Information Center

    Willis, Lucinda; Wilkie, LeAnn

    2009-01-01

    Faculty at a small university discussed digital portfolios for technology support students who were entering the senior year without a portfolio that illustrated their knowledge and skills for potential employers. Business leaders expressed the need for graduates to demonstrate technological skills and other critical competency areas. Recent…

  13. Portfolio Assessment Handbook. 1990-91.

    ERIC Educational Resources Information Center

    Thomas A. Edison State Coll., Trenton, NJ.

    This handbook gives the adult student information to complete portfolios that are designed to help adult students earn college credits for outside experience. Portfolio assessment is a flexible and efficient way to earn college credit. Nearly any area of learning can be converted into credits as long as it is taught at a regionally accredited…

  14. Capstone Portfolios and Geography Student Learning Outcomes

    ERIC Educational Resources Information Center

    Mossa, Joann

    2014-01-01

    Due to increasing demands regarding student learning outcomes and accreditation, a capstone portfolio was added to assess critical thinking and communication skills of geography majors at a large public university in the USA. The portfolio guidelines were designed to be adaptable to a flexible curriculum where about half of the requirements within…

  15. Reflection during Portfolio-Based Conversations

    ERIC Educational Resources Information Center

    Oosterbaan, Anne E.; van der Schaaf, Marieke F.; Baartman, Liesbeth K. J.; Stokking, Karel M.

    2010-01-01

    This study aims to explore the relationship between the occurrence of reflection (and non-reflection) and thinking activities (e.g., orientating, selecting, analysing) during portfolio-based conversations. Analysis of 21 transcripts of portfolio-based conversations revealed that 20% of the segments were made up of reflection (content reflection…

  16. Student Portfolios: A Collection of Articles.

    ERIC Educational Resources Information Center

    Fogarty, Robin, Ed.

    More and more, schools are looking to student portfolios as a valid, reliable, and authentic form of assessment. This collection offers practical, well-researched answers to a variety of philosophical, organizational, and implementational questions surrounding portfolio assessment. Articles in the first section provide a rationale for student…

  17. ePortfolios Meet Social Software

    ERIC Educational Resources Information Center

    Waters, John K.

    2007-01-01

    Although a seemingly good idea, electronic portfolios have to date failed to gain significant traction in higher education. Institutions with ePortfolio implementations routinely report high numbers of accounts on their campuses, but few believe that those numbers are a meaningful reflection of actual usage. Change is in the air for the…

  18. Portfolios: Conceptual Foundations and Functional Implications

    ERIC Educational Resources Information Center

    Luescher, Andreas; Sinn, John W.

    2003-01-01

    In this article the authors address several important areas that combine to illuminate the portfolio as performance, index, and design. They provide an in-depth look at the conceptual foundation and selected functional implications of portfolios. Accordingly, the foundations laid here may serve as a basis for further development and application to…

  19. The Professional Portfolio as Heuristic Methodology.

    ERIC Educational Resources Information Center

    Luescher, Andreas

    2002-01-01

    Argues that the portfolio deserves at very least a re-evaluation throughout academic (to say nothing of quotidian) life as an indispensable tool of the spirit of pedagogy. Suggests that Portfolio Process as a class or seminar should be integrated into undergraduate curriculum. Notes that the goal of the course is to link technical design education…

  20. Capstone Portfolios and Geography Student Learning Outcomes

    ERIC Educational Resources Information Center

    Mossa, Joann

    2014-01-01

    Due to increasing demands regarding student learning outcomes and accreditation, a capstone portfolio was added to assess critical thinking and communication skills of geography majors at a large public university in the USA. The portfolio guidelines were designed to be adaptable to a flexible curriculum where about half of the requirements within…

  1. Integrating Web Portfolios into the Learning Process

    ERIC Educational Resources Information Center

    D'Ambrosio, Jay

    2004-01-01

    Web portfolios should be integrated in the learning process as they encourage the students to take an active interest in their own learning and highlights the individual students, their interests and their goals, increases student motivation and provides an excellent method for teaching students. Implementation of Web portfolios could be made more…

  2. A Portfolio for Evaluation of School Superintendents.

    ERIC Educational Resources Information Center

    Stufflebeam, Daniel; And Others

    This guide book contains a model portfolio that is designed for use by school boards in evaluating school superintendents. It can also be adapted to evaluate central-office administrators, principals, and other school-level administrators. The portfolio provides for both formative and summative evaluation. The assessment is keyed to the…

  3. IT Portfolio Selection and IT Synergy

    ERIC Educational Resources Information Center

    Cho, Woo Je

    2010-01-01

    This dissertation consists of three chapters. The primary objectives of this dissertation are: (1) to provide a methodological framework of IT (Information Technology) portfolio management, and (2) to identify the effect of IT synergy on IT portfolio selection of a firm. The first chapter presents a methodological framework for IT project…

  4. e-Portfolios in Music Teacher Education

    ERIC Educational Resources Information Center

    Lind, Vicki

    2007-01-01

    In this article Vicki Lind reports the findings of a case study investigation of the use of electronic portfolios in a music education program. The project focused specifically on the use of electronic portfolios as a tool to document the work of preservice teachers as they prepared for the teaching profession. Two research questions framed this…

  5. Universal portfolios generated by weakly stationary processes

    NASA Astrophysics Data System (ADS)

    Tan, Choon Peng; Pang, Sook Theng

    2014-12-01

    Recently, a universal portfolio generated by a set of independent Brownian motions where a finite number of past stock prices are weighted by the moments of the multivariate normal distribution is introduced and studied. The multivariate normal moments as polynomials in time consequently lead to a constant rebalanced portfolio depending on the drift coefficients of the Brownian motions. For a weakly stationary process, a different type of universal portfolio is proposed where the weights on the stock prices depend only on the time differences of the stock prices. An empirical study is conducted on the returns achieved by the universal portfolios generated by the Ornstein-Uhlenbeck process on selected stock-price data sets. Promising results are demonstrated for increasing the wealth of the investor by using the weakly-stationary-process-generated universal portfolios.

  6. Student evaluations of the portfolio process.

    PubMed

    Murphy, John E; Airey, Tatum C; Bisso, Andrea M; Slack, Marion K

    2011-09-10

    To evaluate pharmacy students' perceived benefits of the portfolio process and to gather suggestions for improving the process. A questionnaire was designed and administered to 250 first-, second-, and third-year pharmacy students at the University of Arizona College of Pharmacy. Although the objectives of the portfolio process were for students to understand the expected outcomes, understand the impact of extracurricular activities on attaining competencies, identify what should be learned, identify their strengths and weaknesses, and modify their approach to learning, overall students perceived the portfolio process as having less than moderate benefit. First-year students wanted more examples of portfolios while second- and third-year students suggested that more time with their advisor would be beneficial. The portfolio process will continue to be refined and efforts made to improve students' perceptions of the process as it is intended to develop the self-assessments skills they will need to improve their knowledge and professional skills throughout their pharmacy careers.

  7. 15. Interior view, greenhouse, from the northwest. The greenhouse interior ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Interior view, greenhouse, from the northwest. The greenhouse interior was quite modest, the space between the floor of the lower level and the joists carrying the loft floor is only five-and-one-half feet. - John Bartram House & Garden, Greenhouse, 54th Street & LIndbergh Boulevard, Philadelphia, Philadelphia County, PA

  8. Greenhouse Gas Court Decision

    EPA Pesticide Factsheets

    View the June 26, 2012, U.S. Court of Appeals- D.C. Circuit's decision to uphold EPA's Endangerment Finding and greenhouse gas regulations issued under the Clean Air Act (CAA) for passenger vehicles and CAA permitting for stationary sources.

  9. 12 CFR 1252.1 - Enterprise portfolio holding criteria.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Enterprise portfolio holding criteria. 1252.1 Section 1252.1 Banks and Banking FEDERAL HOUSING FINANCE AGENCY ENTERPRISES PORTFOLIO HOLDINGS § 1252.1 Enterprise portfolio holding criteria. The Enterprises are required to comply with the portfolio...

  10. Assessment and Assurance of Learning Using E-Portfolios

    ERIC Educational Resources Information Center

    Papp, Raymond

    2014-01-01

    Traditional paper portfolios have been used to assess student work for performance and employment purposes for decades. The advent of electronic portfolios incorporating audio, video, hyperlinked documents and scanned images takes the use of portfolios to a new level. Evaluators can use these easily accessible portfolios to gauge student…

  11. 12 CFR 702.104 - Risk portfolios defined.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 7 2013-01-01 2013-01-01 false Risk portfolios defined. 702.104 Section 702... CORRECTIVE ACTION Net Worth Classification § 702.104 Risk portfolios defined. A risk portfolio is a portfolio... or mature within the next five (5) years, and exclusive of all member business loans (as defined in...

  12. Personal Theory and Reflection in a Professional Practice Portfolio

    ERIC Educational Resources Information Center

    Jones, Elizabeth

    2010-01-01

    Portfolios are widely used in the assessment of professional learning. Although claims are made that portfolios promote reflection, the nature of such reflection and the mechanisms that promote it in the portfolio process are not well understood. A four-year action research project investigated a professional practice portfolio for high stakes…

  13. Portfolio Assessment: A Handbook for Educators. Assessment Bookshelf Series.

    ERIC Educational Resources Information Center

    Barton, James, Ed.; Collins, Angelo, Ed.

    This guide contains practical steps for integrating portfolios into any K-12 classroom and tips for effective classroom management of portfolios. It also contains actual examples of portfolios in action in a variety of subject areas. The chapters are: (1) "Starting Out: Designing Your Portfolio" (James Barton and Angelo Collins); (2) "Preparing…

  14. Beyond the Electronic Portfolio: A Lifetime Personal Web Space

    ERIC Educational Resources Information Center

    Cohn, Ellen R.; Hibbitts, Bernard J.

    2004-01-01

    The electronic portfolio (e-portfolio) is higher education's new "got to have it" tool--the show-and-tell platform of the millennium. Hundreds of academic institutions are variously studying, using, or innovating e-portfolio systems. Indeed, the current e-portfolio movement is spawning new university committees; on-campus training modules, books,…

  15. 12 CFR 702.104 - Risk portfolios defined.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 6 2010-01-01 2010-01-01 false Risk portfolios defined. 702.104 Section 702... CORRECTIVE ACTION Net Worth Classification § 702.104 Risk portfolios defined. A risk portfolio is a portfolio... § 702.2(d)); (d) Low-risk assets. Cash on hand (e.g., coin and currency, including vault, ATM and teller...

  16. Professional Teaching Portfolios: For Pros and Preservice Teachers Alike.

    ERIC Educational Resources Information Center

    Campbell, Mark Robin; Brummett, Verna M.

    2002-01-01

    Discusses how preservice and experienced teachers can utilize professional teaching portfolios. Explains three types of portfolios: (1) process-folios; (2) product-folios, and (3) process/product-folios. Also explains the procedures for creating a professional portfolio and what is included in a portfolio. Includes a table called "Common…

  17. Beyond the Electronic Portfolio: A Lifetime Personal Web Space

    ERIC Educational Resources Information Center

    Cohn, Ellen R.; Hibbitts, Bernard J.

    2004-01-01

    The electronic portfolio (e-portfolio) is higher education's new "got to have it" tool--the show-and-tell platform of the millennium. Hundreds of academic institutions are variously studying, using, or innovating e-portfolio systems. Indeed, the current e-portfolio movement is spawning new university committees; on-campus training modules, books,…

  18. 12 CFR 702.104 - Risk portfolios defined.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 6 2011-01-01 2011-01-01 false Risk portfolios defined. 702.104 Section 702... CORRECTIVE ACTION Net Worth Classification § 702.104 Risk portfolios defined. A risk portfolio is a portfolio... or mature within the next five (5) years, and exclusive of all member business loans (as defined in...

  19. 12 CFR 702.104 - Risk portfolios defined.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 7 2012-01-01 2012-01-01 false Risk portfolios defined. 702.104 Section 702... CORRECTIVE ACTION Net Worth Classification § 702.104 Risk portfolios defined. A risk portfolio is a portfolio... or mature within the next five (5) years, and exclusive of all member business loans (as defined in...

  20. The Teaching Portfolio: Capturing the Scholarship in Teaching.

    ERIC Educational Resources Information Center

    Edgerton, Russell; And Others

    This report argues a case for the use of professional teaching portfolios by educators in higher education, advances a point of view about portfolio issues, and offers examples of portfolio entries. A work-sample-plus-reflection model is presented as a guide for what might be included in a portfolio and why it might be used at a particular campus.…

  1. Teaching Strategies. Portfolios: Interactive and Dynamic Instructional Tool.

    ERIC Educational Resources Information Center

    Stone, Sandra J.

    1995-01-01

    Discusses teachers' use of portfolios by teachers for instruction. Describes ways to use them effectively: integrating portfolio assessment into the instructional day, making decisions about its content as the teacher works with the child, and holding portfolio conferences frequently. Reviews research on the contribution of portfolios to teachers'…

  2. Teacher Portfolios, Vehicles of Faculty Assessment, Reflection, and Growth.

    ERIC Educational Resources Information Center

    Ekbatani, Glayol; Pierson, Herbert

    Use of portfolios as a tool for English-as-a-Second-Language (ESL) teacher development and evaluation, using principles and practices borrowed from portfolio use to assess learner progress, is advocated. The origins of portfolios in art and other professions and their adaptation for teaching are outlined. The structure of such a portfolio is then…

  3. Portfolio Assessment: When Bad Things Happen to Good Ideas.

    ERIC Educational Resources Information Center

    Dudley, Martha

    2001-01-01

    Notes that portfolios are a valuable classroom practice and one with many applications to the world students will enter when they leave the classroom, but the use of portfolios to assess distorts the concept and weakens its effectiveness. Discourages the use of portfolios for assessment. Concludes that portfolios are not about assessment; they are…

  4. Operation GREENHOUSE-1951. Final report

    SciTech Connect

    Berkhouse, L.; Davis, S.E.; Gladeck, F.R.; Hallowell, J.H.; Jones, C.B.

    1983-06-15

    GREENHOUSE was a four-detonation atmospheric nuclear weapon's test series conducted in the Marshall Islands at Enewetak Atoll in April and May 1951. This is a report of DOD personnel in GREENHOUSE with an emphasis on operational radiological safety.

  5. Departmental portfolio in nursing - An advanced instrument.

    PubMed

    Rassin, M; Silner, D; Ehrenfeld, M

    2006-01-01

    In this paper, we will demonstrate the importance of the departmental portfolio; suggest an execution plan, and present initial impressions from a pilot project of developing the concept of a departmental portfolio. The portfolio is well known in the field of nursing and so far has been used by individuals mainly as a personal tool in furthering one's professional career. In this paper, we will suggest that expanding the use of a portfolio will be also beneficial at a collective level, by creating a departmental portfolio. The main objective of the departmental portfolio is to further the educational and professional development of the department members, by using it as an educating, evaluating, and administrative tool. We argue that a departmental portfolio should consist of several chapters: a professional presentation of the department, including its nursing world view; the work related to the development of the staff and education in service; information that coordinates actions designed to further the nursing treatment for patients, and information that depicts the achievements of the department in fields such as service, education, research, and publication.

  6. Reflecting on the use of student portfolios.

    PubMed

    Harris, S; Dolan, G; Fairbairn, G

    2001-05-01

    The use of portfolios in nursing has increased during recent years. We reflect upon the design and implementation of a portfolio for pre-registration nursing students in the School of Care Sciences(1)at the University of Glamorgan. The portfolio was introduced as the result of the need to address the theory-practice divide and to provide nurse students with the skills to maintain a professional profile upon registration. We also discuss other potential benefits associated with using the portfolio. These include the use of a portfolio as a focus for discussion between the student and their preceptor or personal tutor, a vehicle for the development of reflective skills and a means of assessment. We acknowledge that along with benefits, there are a number of potential problems and limitations in their use, for example, an increase in the workload for the student, preceptor and personal tutor. We include preliminary findings of an evaluation of our portfolio, revealing that both students and staff value the introduction of the portfolio, although currently it is not a high priority in terms of the course as a whole.

  7. Developing Water Resource Security in a Greenhouse Gas Constrained Context - A Case Study in California

    NASA Astrophysics Data System (ADS)

    Tarroja, B.; Aghakouchak, A.; Samuelsen, S.

    2015-12-01

    The onset of drought conditions in regions such as California due to shortfalls in precipitation has brought refreshed attention to the vulnerability of our water supply paradigm to changes in climate patterns. In the face of a changing climate which can exacerbate drought conditions in already dry areas, building resiliency into our water supply infrastructure requires some decoupling of water supply availability from climate behavior through conservation, efficiency, and alternative water supply measures such as desalination and water reuse. The installation of these measures requires varying degrees of direct energy inputs and/or impacts the energy usage of the water supply infrastructure (conveyance, treatment, distribution, wastewater treatment). These impacts have implications for greenhouse gas emissions from direct fuel usage or impacts on the emissions from the electric grid. At the scale that these measures may need to be deployed to secure water supply availability, especially under climate change impacted hydrology, they can potentially pose obstacles for meeting greenhouse gas emissions reduction and renewable utilization goals. Therefore, the portfolio of these measures must be such that detrimental impacts on greenhouse gas emissions are minimized. This study combines climate data with a water reservoir network model and an electric grid dispatch model for the water-energy system of California to evaluate 1) the different pathways and scale of alternative water resource measures needed to secure water supply availability and 2) the impacts of following these pathways on the ability to meet greenhouse gas and renewable utilization goals. It was discovered that depending on the water supply measure portfolio implemented, impacts on greenhouse gas emissions and renewable utilization can either be beneficial or detrimental, and optimizing the portfolio is more important under climate change conditions due to the scale of measures required.

  8. A new fuzzy multi-objective higher order moment portfolio selection model for diversified portfolios

    NASA Astrophysics Data System (ADS)

    Yue, Wei; Wang, Yuping

    2017-01-01

    Due to the important effect of the higher order moments to portfolio returns, the aim of this paper is to make use of the third and fourth moments for fuzzy multi-objective portfolio selection model. Firstly, in order to overcome the low diversity of the obtained solution set and lead to corner solutions for the conventional higher moment portfolio selection models, a new entropy function based on Minkowski measure is proposed as a new objective function and a novel fuzzy multi-objective weighted possibilistic higher order moment portfolio model is presented. Secondly, to solve the proposed model efficiently, a new multi-objective evolutionary algorithm is designed. Thirdly, several portfolio performance evaluation techniques are used to evaluate the performance of the portfolio models. Finally, some experiments are conducted by using the data of Shanghai Stock Exchange and the results indicate the efficiency and effectiveness of the proposed model and algorithm.

  9. Adapting portfolio theory for the evaluation of multiple investments in health with a multiplicative extension for treatment synergies.

    PubMed

    Bridges, J F P; Stewart, M; King, M T; van Gool, K

    2002-01-01

    Portfolio theory is central to the analysis of risk in many areas of economics but is seldom used appropriately in health economics. This contribution examines the use of portfolio theory in the context of cost-effectiveness analysis (CEA). A number of modifications are needed to apply portfolio analysis to the economic evaluation of health care interventions. First, the method of reporting the results of a CEA, and consequently some of the underlying assumptions, needs to be modified. Second, portfolio theory needs to be expressed in terms of effects on individuals aggregated to a population. Finally, one needs to allow for the possibility of synergy between the various health interventions. This paper derives a general formula for a portfolio of health care interventions that allows for synergies between interventions where the population effects are aggregated from individual effects. A number of special cases are also derived to highlight the nature of the formulation of the modified portfolio theory. We conclude that, while modified portfolio theory adds a theoretical foundation to health care evaluations, it may not be operational until estimates of the correlation between interventions are available, and the question of uncertainty is resolved in health care evaluation. Also, while a synergy may be present at the individual level, when aggregated over a large population it may not be significant given the standard assumption of constant returns to scale.

  10. Portfolio analysis of layered security measures.

    PubMed

    Chatterjee, Samrat; Hora, Stephen C; Rosoff, Heather

    2015-03-01

    Layered defenses are necessary for protecting the public from terrorist attacks. Designing a system of such defensive measures requires consideration of the interaction of these countermeasures. In this article, we present an analysis of a layered security system within the lower Manhattan area. It shows how portfolios of security measures can be evaluated through portfolio decision analysis. Consideration is given to the total benefits and costs of the system. Portfolio diagrams are created that help communicate alternatives among stakeholders who have differing views on the tradeoffs between security and economic activity. © 2014 Society for Risk Analysis.

  11. Using portfolio evaluation for program outcome assessment.

    PubMed

    Kear, Mavra E; Bear, Mary

    2007-03-01

    Portfolio evaluation is an efficient and effective strategy to objectively demonstrate the accomplishment of program objectives using students' perceptions of their academic experiences. A portfolio evaluation tool was developed to quantitatively measure students' perceptions of their achievement of the nursing program's goals and objectives. Data were collected from a convenience sample of 26 portfolio evaluations. Reliability testing showed the tool has high interrater reliability, with Cohen's Kappa >0.80 for most items. Individual achievement of program goals and objectives ranged from 53.6% to 100%. These data will be used in the next formative evaluation of the curriculum to revise program objectives and correspondneing course objectives and assignments.ty

  12. Does asymmetric correlation affect portfolio optimization?

    NASA Astrophysics Data System (ADS)

    Fryd, Lukas

    2017-07-01

    The classical portfolio optimization problem does not assume asymmetric behavior of relationship among asset returns. The existence of asymmetric response in correlation on the bad news could be important information in portfolio optimization. The paper applies Dynamic conditional correlation model (DCC) and his asymmetric version (ADCC) to propose asymmetric behavior of conditional correlation. We analyse asymmetric correlation among S&P index, bonds index and spot gold price before mortgage crisis in 2008. We evaluate forecast ability of the models during and after mortgage crisis and demonstrate the impact of asymmetric correlation on the reduction of portfolio variance.

  13. A nonparametric and diversified portfolio model

    NASA Astrophysics Data System (ADS)

    Shirazi, Yasaman Izadparast; Sabiruzzaman, Md.; Hamzah, Nor Aishah

    2014-07-01

    Traditional portfolio models, like mean-variance (MV) suffer from estimation error and lack of diversity. Alternatives, like mean-entropy (ME) or mean-variance-entropy (MVE) portfolio models focus independently on the issue of either a proper risk measure or the diversity. In this paper, we propose an asset allocation model that compromise between risk of historical data and future uncertainty. In the new model, entropy is presented as a nonparametric risk measure as well as an index of diversity. Our empirical evaluation with a variety of performance measures shows that this model has better out-of-sample performances and lower portfolio turnover than its competitors.

  14. Deaf college students' perspectives on literacy portfolios.

    PubMed

    Nickerson, Jane Freiburg

    2003-01-01

    The study examined how literacy portfolios were used as tools in a college developmental English class in which deaf students assessed their reading comprehension as well as their writing processes and products. The students' reading and writing assignments involved reflective thinking and were grounded in authentic tasks. Immediate feedback was provided. The study was multidimensional, longitudinal, and ongoing. A variety of field research techniques were used to ascertain the uses and influences of portfolios in regard to students' reading, writing, and reflective thinking. The results support the idea that the use of literacy portfolios can positively influence students who are deaf when they assess their reading and writing abilities.

  15. Information Technology Portfolio Management Proof of Concept: Modern Portfolio Theory With KVA and ROI Analysis

    DTIC Science & Technology

    2010-09-01

    DoD decision makers to formalize their evaluation methods concerning IT portfolio investment diversification and management of risk. In order to...apply MPT correctly, key decision makers need to be able to compute mean values of the return for every stock in a portfolio as well as the correlation ...percentage (B5, 13 percent) multiplied by NWSC’s ROI (F5, negative 79 percent), asset ASW’s portfolio percentage (B6, 24 percent) multiplied by ASW’s ROI

  16. An Introduction to Greenhouse Production. Second Edition.

    ERIC Educational Resources Information Center

    McMahon, Robert W.

    This student manual is presented in its first revision, providing a current, basic text for those preparing for greenhouse and floriculture work. Its fourteen chapters are: Overview of the Greenhouse Industry; Greenhouse Structures; Controlling the Greenhouse Environment; Greenhouse Equipment and Lighting; Greenhouse Irrigation Systems; Root Media…

  17. (Solar pods (greenhouses))

    SciTech Connect

    Kerr, R.T.

    1985-01-01

    Detailed instructions for the construction of solar pads are presented. The materials necessary for constructing the solar pad are made available in kit form. A list of the materials includes: dome shaped double glazing; end plates and supports; 2 x 4's; a snow support rib; and pressure strips. Assembly of the structure is made easy with an electric drill and simple hand tools. The solar pads resemble miniature greenhouses and are used for year round horticulture. (BCS)

  18. Iron versus the greenhouse

    SciTech Connect

    Monastersky, R.

    1995-09-30

    This paper reports on the possible repercussions of a Pacific Ocean experiment which demonstrated the effects of adding iron to the ocean. The plant growth stimulated was enough to use 350000 kilograms of carbon dioxide from the seawater. If performed on a large scale, fertilization of ocean water could absorb billions of tones of carbon dioxide from the air, enough to slow the rate of greenhouse warming. A variety of opinions are presented in the article.

  19. The greenhouse trap

    SciTech Connect

    Lyman, F.; Mintzer, I.; Courrier, K.; MacKenzie, J.

    1990-01-01

    This book describes evidence of global warming and the contributions of man's activities to the process. The impacts of greenhouse gases on climate and health are discussed and recommendations are made for mitigation of these effects. Changes in fuel use, expansion of carbon sinks through planting of trees, and personal commitments to energy conservation are among these recommendations. Individual chapters were indexed separately for the data base.

  20. Operation GREENHOUSE-1951

    DTIC Science & Technology

    1983-06-15

    potential for exposure of weapon diagnostics participants. 26 Effects Experiments All four GREENHOUSE shots tested new weapon developments. Priorities of...but crawling some of the way. Each round trip took about 15 minutes and was made in a different set of test trousers (Reference 72, p. 10). Th...aboard two VB -29s, and aboard an RB-29 from the Strategic Air Command (SAC). flown in specifically to participate in this S. experiment. The film was

  1. Review of Quantitative Monitoring Methodologies for Emissions Verification and Accounting for Carbon Dioxide Capture and Storage for California’s Greenhouse Gas Cap-and-Trade and Low-Carbon Fuel Standard Programs

    SciTech Connect

    Oldenburg, Curtis M.; Birkholzer, Jens T.

    2014-12-23

    The Cap-and-Trade and Low Carbon Fuel Standard (LCFS) programs being administered by the California Air Resources Board (CARB) include Carbon Dioxide Capture and Storage (CCS) as a potential means to reduce greenhouse gas (GHG) emissions. However, there is currently no universal standard approach that quantifies GHG emissions reductions for CCS and that is suitable for the quantitative needs of the Cap-and-Trade and LCFS programs. CCS involves emissions related to the capture (e.g., arising from increased energy needed to separate carbon dioxide (CO2) from a flue gas and compress it for transport), transport (e.g., by pipeline), and storage of CO2 (e.g., due to leakage to the atmosphere from geologic CO2 storage sites). In this project, we reviewed and compared monitoring, verification, and accounting (MVA) protocols for CCS from around the world by focusing on protocols specific to the geologic storage part of CCS. In addition to presenting the review of these protocols, we highlight in this report those storage-related MVA protocols that we believe are particularly appropriate for CCS in California. We find that none of the existing protocols is completely appropriate for California, but various elements of all of them could be adopted and/or augmented to develop a rigorous, defensible, and practical surface leakage MVA protocol for California. The key features of a suitable surface leakage MVA plan for California are that it: (1) informs and validates the leakage risk assessment, (2) specifies use of the most effective monitoring strategies while still being flexible enough to accommodate special or site-specific conditions, (3) quantifies stored CO2, and (4) offers defensible estimates of uncertainty in monitored properties. California’s surface leakage MVA protocol needs to be applicable to the main CO2 storage opportunities (in California and in other states with entities participating in California

  2. Use of a structured interview to assess portfolio-based learning.

    PubMed

    Burch, Vanessa C; Seggie, Janet L

    2008-09-01

    Portfolio-based learning is a popular educational tool usually examined by document review which is sometimes accompanied by an oral examination. This labour-intensive assessment method prohibits its use in the resource-constrained settings typical of developing countries. We aimed to determine the feasibility and internal consistency of a portfolio-based structured interview and its impact on student learning behaviour. Year 4 medical students (n = 181) recorded 25 patient encounters during a 14-week medical clerkship. Portfolios were examined in a 30-minute, single-examiner interview in which four randomly selected cases were discussed. Six standard questions were used to guide examiners in determining the ability of candidates to interpret and synthesise clinical data gathered during patient encounters. Examiners were trained to score responses using a global rating scale. Pearson's correlation co-efficient, Cronbach's alpha coefficient and the standard error of measurement (SEM) of the assessment tool were determined. The number of students completing more than the required number of portfolio entries was also recorded. The mean (+/- standard deviation [SD], 95% confidence interval [CI]) interview score was 67.5% (SD +/- 10.5, 95% CI 66.0-69.1). The correlation coefficients for the interview compared with other component examinations of the assessment process were: multiple-choice question (MCQ) examination 0.42; clinical case-based examination 0.37; in-course global rating 0.08, and overall final score 0.54. Cronbach's alpha coefficient was 0.88 and the SEM was 3.6. Of 181 students, 45.3% completed more than 25 portfolio entries. Portfolio assessment using a 30-minute structured interview is a feasible, internally consistent assessment method that requires less examination time per candidate relative to methods described in published work and which may encourage desirable student learning behaviour.

  3. Understanding the multifractality in portfolio excess returns

    NASA Astrophysics Data System (ADS)

    Chen, Cheng; Wang, Yudong

    2017-01-01

    The multifractality in stock returns have been investigated extensively. However, whether the autocorrelations in portfolio returns are multifractal have not been considered in the literature. In this paper, we detect multifractal behavior of returns of portfolios constructed based on two popular trading rules, size and book-to-market (BM) ratio. Using the multifractal detrended fluctuation analysis, we find that the portfolio returns are significantly multifractal and the multifractality is mainly attributed to long-range dependence. We also investigate the multifractal cross-correlation between portfolio return and market average return using the detrended cross-correlation analysis. Our results show that the cross-correlations of small fluctuations are persistent, while those of large fluctuations are anti-persistent.

  4. The Proof Is in the Portfolio.

    ERIC Educational Resources Information Center

    Diamond, Marie; Handi, Ed

    2002-01-01

    Describes the design and implementation of a portfolio evaluation plan for teachers at North Haven, Connecticut, Public Schools, key components of which are professional development and training for both teachers and administrators. (PKP)

  5. Universal portfolios generated by Vandermonde generating matrix

    NASA Astrophysics Data System (ADS)

    Tan, Choon Peng; Yong, Say Loong

    2017-04-01

    A universal portfolio generated by the one-parameter symmetric positive definite Vandermonde matrix is studied. It is obtained by maximizing the scaled growth rate of the estimated daily wealth return and minimizing the Mahalanobis squared divergence of two portfolio vectors associated with the Vandermonde matrix. The parameter of the Vandermonde matrix is chosen so that the matrix is positive definite. The companion matrices of the three and five-dimensional generating matrices are evaluated to determine the portfolios. Three and five stock-data sets are selected from the local stock exchange in Malaysia and the empirical performance of the portfolios is presented. There is empirical evidence that the use of an appropriate generating Vandermonde matrix may increase the wealth of investors.

  6. Grounding Our Vision and Ambitions in 21st Century Reality: Tools and Tangible Outcomes Which Exemplify OXY Teacher Leader Development and Achievement. Assessment Standards 1st. OXY Teacher Leader Career Portfolio.

    ERIC Educational Resources Information Center

    Olson, Martin N.

    In both California and the United States as a whole, new emphasis is being placed on greater accountability for all educators. Educators find that they are facing too many sets of standards, making it difficult to focus on priorities. This paper provides five essential tools to demonstrate teaching competence. These tools can be the ways and means…

  7. Teaching portfolios: reflecting upon and improving teaching.

    PubMed

    Roth, L M

    1998-01-01

    A number of benefits can be seen for academic medical faculty and their learners as a result of using the teaching portfolio to focus on faculty's work as educators. While the portfolio's initial purpose may be to document the extent and quality of teaching, thoughtful reflection on and documentation of the process and outcomes of teaching can lead faculty to advance in their teaching skills as medical practitioners who are charged with inducting new learners into the profession.

  8. A Study of Secondary Teachers' Implementation of an Electronic Portfolio Initiative

    ERIC Educational Resources Information Center

    Viggiano, Anna Marie

    2009-01-01

    This qualitative case study examined implementation of the ePortfolio, developed by the Hawai'i Department of Education as a system to store formative and summative assessment supporting standards-based education. The focus of the study examined factors increasing teacher willingness, confidence and knowledge in implementation of electronic…

  9. Universities as Responsive Learning Organizations through Competency-Based Assessment with Electronic Portfolios

    ERIC Educational Resources Information Center

    Cambridge, Darren

    2008-01-01

    Universities should embrace democratic values. Using electronic portfolios, competency-based assessment can enact them. Rather than preset standards, competencies become boundary objects connecting individual student experience to community conversation about what it means to be educated. This article examines this approach in practice at New…

  10. High School Teachers' Perceptions of ePortfolios and Classroom Practice: A Single-Case Study

    ERIC Educational Resources Information Center

    Pimentel, Jerelyn M.

    2010-01-01

    Rhode Island's proficiency-based high school diploma system requires high school graduates to demonstrate proficiency in standard-based content and applied learning skills through at least two performance assessment measures (RIDE, 2003). To meet these requirements, 12 of Rhode Island's 39 school districts are using ePortfolios as one of their…

  11. Beyond the "Bells and Whistles": Toward a Visual Rhetoric for Teachers' Digital Portfolios

    ERIC Educational Resources Information Center

    Hicks, Troy

    2005-01-01

    Analyzing the creation of a digital portfolio from a digital and visual rhetorical stance, rather than from a standards-based or technical competency position, affords a teacher many more opportunities to think critically about their work, understand the choices they are making in representing that work online to diverse audiences, and continually…

  12. Using Digital Portfolios to Develop Non-Traditional Domains in Special Education Settings

    ERIC Educational Resources Information Center

    Clancy, Mary; Gardner, Jessica

    2017-01-01

    This article chronicles the development of a portfolio system used primarily to assess special education high school students on a variety of traditional and non-traditional standards and skills. Developing, capturing, sharing, and assessing student learning can be problematic when traditional testing or classroom assessment methods are not an…

  13. Promoting Intercultural Understanding and Reducing Stereotypes: Incorporating the Cultural Portfolio Project into Taiwan's EFL College Classes

    ERIC Educational Resources Information Center

    Su, Ya-Chen

    2011-01-01

    Learning about foreign language (FL) cultures is becoming an important objective in the FL curricula and national standards of different countries throughout the world. The purpose of the study was to examine the effects of the cultural portfolio project on: (1) students' concept development in their perceptions of the target language culture and…

  14. High School Teachers' Perceptions of ePortfolios and Classroom Practice: A Single-Case Study

    ERIC Educational Resources Information Center

    Pimentel, Jerelyn M.

    2010-01-01

    Rhode Island's proficiency-based high school diploma system requires high school graduates to demonstrate proficiency in standard-based content and applied learning skills through at least two performance assessment measures (RIDE, 2003). To meet these requirements, 12 of Rhode Island's 39 school districts are using ePortfolios as one of their…

  15. Promoting Intercultural Understanding and Reducing Stereotypes: Incorporating the Cultural Portfolio Project into Taiwan's EFL College Classes

    ERIC Educational Resources Information Center

    Su, Ya-Chen

    2011-01-01

    Learning about foreign language (FL) cultures is becoming an important objective in the FL curricula and national standards of different countries throughout the world. The purpose of the study was to examine the effects of the cultural portfolio project on: (1) students' concept development in their perceptions of the target language culture and…

  16. Climate Change Technology R&D Portfolio Decision Making Under Uncertainty

    SciTech Connect

    Baker, E.; Keisler, J.; Chon, H.

    2008-11-17

    In this project we have completed, or are in the process of, collecting and analyzing information on seven energy technologies – solar photovoltaics, nuclear power, carbon capture and storage, electricity from biomass, liquid bio-fuels, and batteries – in regards to their potential impact on reducing greenhouse gas emissions. We have collected expert elicitations, relating U.S. government funding trajectories to probabilities of success. We then used MiniCAM, a technologically-detailed Integrated Assessnent Model to determine the impact on the marginal cost of reducing greenhouse gas emissions, if the technologies were successful. Finally, we have performed initial analysis on portfolios of technologies. This project has partially supported nine papers, either published, under review, or under preparation for such journals as Energy Economics, The Energy Journal, Climatic Change, Management Science, and Transportation Research.

  17. A Pilot Evaluation of Portfolios for Quality Attestation of Clinical Ethics Consultants.

    PubMed

    Fins, Joseph J; Kodish, Eric; Cohn, Felicia; Danis, Marion; Derse, Arthur R; Dubler, Nancy Neveloff; Goulden, Barbara; Kuczewski, Mark; Mercer, Mary Beth; Pearlman, Robert A; Smith, Martin L; Tarzian, Anita; Youngner, Stuart J

    2016-01-01

    Although clinical ethics consultation is a high-stakes endeavor with an increasing prominence in health care systems, progress in developing standards for quality is challenging. In this article, we describe the results of a pilot project utilizing portfolios as an evaluation tool. We found that this approach is feasible and resulted in a reasonably wide distribution of scores among the 23 submitted portfolios that we evaluated. We discuss limitations and implications of these results, and suggest that this is a significant step on the pathway to an eventual certification process for clinical ethics consultants.

  18. Portfolio learning/assessment in nursing and midwifery: an innovation in progress.

    PubMed

    Emden, Carolyn; Hutt, Diana; Bruce, Meredith

    This paper describes portfolio projects currently underway within three South Australian settings: an undergraduate general nursing curriculum, a postgraduate perioperative nursing course, and a major general hospital and health service. The projects share a common interest in achieving an organised, useful means for registered nurses and midwives to demonstrate their competence in accord with contemporary professional standards. Their beginnings in international research and experience is described, and the progress of each project tracked to date. Others wishing to develop similar innovations can follow this decision trail and the advice offered. Outcomes to date indicate portfolios hold promise for advancing professional nursing and midwifery practice. Research currently underway on the topic is highlighted.

  19. Minimal investment risk of a portfolio optimization problem with budget and investment concentration constraints

    NASA Astrophysics Data System (ADS)

    Shinzato, Takashi

    2017-02-01

    In the present paper, the minimal investment risk for a portfolio optimization problem with imposed budget and investment concentration constraints is considered using replica analysis. Since the minimal investment risk is influenced by the investment concentration constraint (as well as the budget constraint), it is intuitive that the minimal investment risk for the problem with an investment concentration constraint can be larger than that without the constraint (that is, with only the budget constraint). Moreover, a numerical experiment shows the effectiveness of our proposed analysis. In contrast, the standard operations research approach failed to identify accurately the minimal investment risk of the portfolio optimization problem.

  20. A qualitative examination of teaching portfolios as a means of transmitting science education values and promoting reflective practice in novice teachers

    NASA Astrophysics Data System (ADS)

    Doty, Margaret Hawthorne

    Increasing numbers of schools are using teaching portfolios for professional development and evaluation purposes. Several researchers have stated that portfolios foster reflectivity in the teachers who prepare them, and others have found the preparation of portfolios effective in changing teaching behaviors. Current reforms in science education call for teachers to provide opportunities for students to engage in inquiry activities over extended periods of time, placing content in contexts that are relevant to students' everyday lives. Strategies to help teachers revise their practice to bring it into better alignment with the national standards movements are needed. The guidelines for the preparation of a teaching portfolio offer a method by which values about science teaching and learning may be transmitted to novice teachers. This study examined the guidelines for the Connecticut State Department of Education's Beginning Science Teaching Portfolio required of all second-year secondary science teachers to discern what values were embedded. These values were compared to the National Science Education Standards to assess their alignment with current reforms. Four Connecticut science teachers were observed in their classrooms and interviewed before and after the preparation of their teaching portfolios to determine if the quality, quantity and type of reflection changed as they went through the portfolio process. Analysis of the observations, interviews and teaching portfolios determined if their practice changed as a result of the portfolio. It was found that the primary science values reflected in the portfolio guidelines related to the nature of science and the role of the teacher, consistent with the major science standards movements. The teachers in this study changed their practice due to their portfolio preparation, shifting from a more teacher-centered perspective to a more student-centered one, and incorporating more inquiry-based and contextualized content

  1. Firefly Algorithm for Cardinality Constrained Mean-Variance Portfolio Optimization Problem with Entropy Diversity Constraint

    PubMed Central

    2014-01-01

    Portfolio optimization (selection) problem is an important and hard optimization problem that, with the addition of necessary realistic constraints, becomes computationally intractable. Nature-inspired metaheuristics are appropriate for solving such problems; however, literature review shows that there are very few applications of nature-inspired metaheuristics to portfolio optimization problem. This is especially true for swarm intelligence algorithms which represent the newer branch of nature-inspired algorithms. No application of any swarm intelligence metaheuristics to cardinality constrained mean-variance (CCMV) portfolio problem with entropy constraint was found in the literature. This paper introduces modified firefly algorithm (FA) for the CCMV portfolio model with entropy constraint. Firefly algorithm is one of the latest, very successful swarm intelligence algorithm; however, it exhibits some deficiencies when applied to constrained problems. To overcome lack of exploration power during early iterations, we modified the algorithm and tested it on standard portfolio benchmark data sets used in the literature. Our proposed modified firefly algorithm proved to be better than other state-of-the-art algorithms, while introduction of entropy diversity constraint further improved results. PMID:24991645

  2. Firefly algorithm for cardinality constrained mean-variance portfolio optimization problem with entropy diversity constraint.

    PubMed

    Bacanin, Nebojsa; Tuba, Milan

    2014-01-01

    Portfolio optimization (selection) problem is an important and hard optimization problem that, with the addition of necessary realistic constraints, becomes computationally intractable. Nature-inspired metaheuristics are appropriate for solving such problems; however, literature review shows that there are very few applications of nature-inspired metaheuristics to portfolio optimization problem. This is especially true for swarm intelligence algorithms which represent the newer branch of nature-inspired algorithms. No application of any swarm intelligence metaheuristics to cardinality constrained mean-variance (CCMV) portfolio problem with entropy constraint was found in the literature. This paper introduces modified firefly algorithm (FA) for the CCMV portfolio model with entropy constraint. Firefly algorithm is one of the latest, very successful swarm intelligence algorithm; however, it exhibits some deficiencies when applied to constrained problems. To overcome lack of exploration power during early iterations, we modified the algorithm and tested it on standard portfolio benchmark data sets used in the literature. Our proposed modified firefly algorithm proved to be better than other state-of-the-art algorithms, while introduction of entropy diversity constraint further improved results.

  3. On the non-stationarity of financial time series: impact on optimal portfolio selection

    NASA Astrophysics Data System (ADS)

    Livan, Giacomo; Inoue, Jun-ichi; Scalas, Enrico

    2012-07-01

    We investigate the possible drawbacks of employing the standard Pearson estimator to measure correlation coefficients between financial stocks in the presence of non-stationary behavior, and we provide empirical evidence against the well-established common knowledge that using longer price time series provides better, more accurate, correlation estimates. Then, we investigate the possible consequences of instabilities in empirical correlation coefficient measurements on optimal portfolio selection. We rely on previously published works which provide a framework allowing us to take into account possible risk underestimations due to the non-optimality of the portfolio weights being used in order to distinguish such non-optimality effects from risk underestimations genuinely due to non-stationarities. We interpret such results in terms of instabilities in some spectral properties of portfolio correlation matrices.

  4. Operationalizing the Student Electronic Portfolio for Doctoral Nursing Education.

    PubMed

    Willmarth-Stec, Melissa; Beery, Teresa

    2015-01-01

    There is an increasing trend toward use of the electronic portfolio (e-portfolio) in Doctor of Nursing Practice programs. E-portfolios can provide documentation of competencies and achievement of program outcomes while showcasing a holistic view of the student achievement. Implementation of the e-portfolio requires careful decision making concerning software selection, set-up, portfolio components, and evaluation. The purpose of this article is to describe the implementation of an e-portfolio in a Doctor of Nursing Practice program and provide lessons learned during the implementation stage.

  5. The greenhouse gambit

    SciTech Connect

    Dogan, D. . Environmental Information Service)

    1992-01-01

    While forecasts of the economic costs and benefits of ameliorating global warming remain speculative, so, too, are the climate change projections that gird the debate. The consensus among most of the scientific community is that a doubling of atmospheric carbon dioxide is likely to raise the mean global temperature of the Earth 3 to 8 degrees Fahrenheit by 2050. To put this forecast in some perspective, the planet was about 10 degrees cooler during the last Great Ice Age and about 10 degrees warmer dozing the Age of the Dinsosaurs. Accordingly, the warming could bring about dramatic changes in climate. But a prudent investor must be careful not to invest too much in pat assumptions about the greenhouse effect. The climate may have many surprises in store. Indeed, it has surprised climate forecasters already by not warming nearly as fast as their general circulation models have suggested it would. This book examines four industries with the most at stake in the greenhouse debate: agriculture, forest products, automobiles and electric power. All of these industries essentially face two choices: Act now to blunt the possible momentum of climate change, or wait and see if the basic forecast is correct, accommodating any change as it occurs. These choices involve a trade-off between further information-gathering to ensure a proper course of action and implementing a strategy, quickly to its intended effect. Such a trade-off is the essence of risk, the stuff of investing. For the purposes of this book, it defines the greenhouse gambit.''

  6. Electronic Teaching Portfolios: Technology Skills + Portfolio Development--Do They = Powerful Preservice Teachers?

    ERIC Educational Resources Information Center

    Capraro, Mary Margaret

    2006-01-01

    Electronic portfolios are a "collection of work captured by electronic means, that serves as an exhibit of individual efforts, progress, and achievements in one or more areas" (Weidmer, 1998, p. 586). Because of the rapid growth and updates in technology, keeping electronic portfolios is becoming increasingly common in a variety of educational…

  7. Electronic Teaching Portfolios: Technology Skills + Portfolio Development--Do They = Powerful Preservice Teachers?

    ERIC Educational Resources Information Center

    Capraro, Mary Margaret

    2006-01-01

    Electronic portfolios are a "collection of work captured by electronic means, that serves as an exhibit of individual efforts, progress, and achievements in one or more areas" (Weidmer, 1998, p. 586). Because of the rapid growth and updates in technology, keeping electronic portfolios is becoming increasingly common in a variety of educational…

  8. Validity of the Learning Portfolio: Analysis of a Portfolio Proposal for the University

    ERIC Educational Resources Information Center

    Gregori-Giralt, Eva; Menéndez-Varela, José Luis

    2015-01-01

    Validity is a central issue in portfolio-based assessment. This empirical study used a quantitative approach to analyse the validity of the inferences drawn from a disciplinary course work portfolio assessment comprising profession-specific and learning competencies. The study also examined the problems involved in the development of the…

  9. Why ePortfolios? Student Perceptions of ePortfolio Use in Continuing Education Learning Environments

    ERIC Educational Resources Information Center

    Wuetherick, Brad; Dickinson, John

    2015-01-01

    Over the past decade, there has been an increased exploration of ePortfolios in higher education across disciplines at both the undergraduate and graduate level. ePortfolios have been significantly under-explored, however, in the context of non-traditional continuing education environments within higher education. This paper explores students'…

  10. Effective Implementation of ePortfolios: The Development of ePortfolios to Support Online Learning

    ERIC Educational Resources Information Center

    Cote, Kyle; Emmett, Tara

    2015-01-01

    This article discusses the ePortfolio system for grades 9-12 at the Virtual Learning Academy Charter School (VLACS). ePortfolio implementation at VLACS developed from an Advisory course curriculum that supports students' journey toward becoming college, career, and citizenship ready. We provide a unique perspective for implementation in that VLACS…

  11. Quality Issues in Judging Portfolios: Implications for Organizing Teaching Portfolio Assessment Procedures

    ERIC Educational Resources Information Center

    Tigelaar, Dineke E. H.; Dolmans, Diana H. J. M.; Wolfhagen, Ineke H. A. P.; van der Vleuten, Cees P. M.

    2005-01-01

    This article addresses the choice of the most appropriate procedure for the assessment of portfolios used in teacher and lecturer assessment. A characteristic of modern assessment modes, including portfolios, is that the information they provide is often qualitative and derived from different contexts. Unambiguous, objective rating of portfolios…

  12. Development of the Electronic Portfolio Student Perspective Instrument: An ePortfolio Integration Initiative

    ERIC Educational Resources Information Center

    Ritzhaupt, Albert Dieter; Singh, Oma; Seyferth, Thelma; Dedrick, Robert F.

    2008-01-01

    With the proliferation of eportfolios and their organizational uses in higher education, it is important for educators and other relevant stakeholders to understand the student perspective. The way students view and use ePortfolios are revealing elements to aid educators in the successful integration of ePortfolio systems. This research describes…

  13. Developing Digital Portfolios: Investigating How Digital Portfolios Can Facilitate Pupil Talk about Learning

    ERIC Educational Resources Information Center

    Wall, Kate; Higgins, Steve; Miller, Jen; Packard, Nick

    2006-01-01

    The Digital Portfolio Project at Newcastle University aimed over one year (2002/2003) to support teachers in producing, storing and accessing assessment portfolios of learner's work using information and communications technology (ICT). This paper draws on evidence of pupil views collected as part of 14 teacher-led case studies. The teachers all…

  14. Effective Implementation of ePortfolios: The Development of ePortfolios to Support Online Learning

    ERIC Educational Resources Information Center

    Cote, Kyle; Emmett, Tara

    2015-01-01

    This article discusses the ePortfolio system for grades 9-12 at the Virtual Learning Academy Charter School (VLACS). ePortfolio implementation at VLACS developed from an Advisory course curriculum that supports students' journey toward becoming college, career, and citizenship ready. We provide a unique perspective for implementation in that VLACS…

  15. The Portfolio Mindset: Innovation Starts from the Ground Up. Portfolio School Districts Project

    ERIC Educational Resources Information Center

    Campbell, Christine

    2012-01-01

    At the first Portfolio School District Network meeting, in 2009, 15 people sat around a table wondering whether the portfolio idea could work only in special circumstances like New York City or New Orleans. Three years later, 27 districts are implementing this continuous improvement strategy and more are eager to learn how they can make it work…

  16. Development of the Electronic Portfolio Student Perspective Instrument: An ePortfolio Integration Initiative

    ERIC Educational Resources Information Center

    Ritzhaupt, Albert Dieter; Singh, Oma; Seyferth, Thelma; Dedrick, Robert F.

    2008-01-01

    With the proliferation of eportfolios and their organizational uses in higher education, it is important for educators and other relevant stakeholders to understand the student perspective. The way students view and use ePortfolios are revealing elements to aid educators in the successful integration of ePortfolio systems. This research describes…

  17. Validity of the Learning Portfolio: Analysis of a Portfolio Proposal for the University

    ERIC Educational Resources Information Center

    Gregori-Giralt, Eva; Menéndez-Varela, José Luis

    2015-01-01

    Validity is a central issue in portfolio-based assessment. This empirical study used a quantitative approach to analyse the validity of the inferences drawn from a disciplinary course work portfolio assessment comprising profession-specific and learning competencies. The study also examined the problems involved in the development of the…

  18. Walking Our Talk about Standards

    ERIC Educational Resources Information Center

    Easton, Lois Brown

    2007-01-01

    In this article, the author argues that, if schools truly were based on standards, they would look much different than they do now. She describes the standards-based system of an experimental school in Colorado. Here, she discusses how students document their work in a variety of ways, such as: (1) various types of portfolios; (2) oral delivery;…

  19. Occupational asthma in greenhouse workers.

    PubMed

    Monsó, Eduard

    2004-03-01

    A prevalence of asthma over 5% has been reported in flower farmers,and work inside greenhouses has emerged as an additional risk factor. Workplace determinants behind this high prevalence has been examined, and a prevalence of sensitization to workplace allergens over 30% has been reported being pollens, moulds, and Tetranychus urticae allergens the main sensitizers. Bronchial challenge tests in the workplace have demonstrated occupational asthma in more than 20% of the sensitized greenhouse growers. Air contamination inside greenhouses is mainly related to moulds, and is facilitated by the high indoor temperature and humidity. Cladosporium, Penicillium, Aspergillus, and Alternaria and a wide range of flower pollens are able to sensitize the greenhouse worker and cause occupational asthma. Tetranychus urticae have allergens shared with other mites, but the low prevalence of cross-sensitization between them confirm that Tetranychus urticae contains species-specific allergens that may cause respiratory symptoms. Additionally, working inside greenhouses has been related to an increase in the prevalence of chronic bronchitis in nonsmokers. The cultivation of greenhouse crops may cause occupational asthma through sensitization to workplace pollens, moulds, and Tetranychus urticae allergens. In greenhouse flower growers, skin testing identifies sensitization to these allergens in one third of the growers, and more than one fifth of the sensitized workers will develop occupational asthma. Greenhouse work has also been related to chronic bronchitis in nonsmokers, suggesting a causal effect of greenhouse air contaminants on this disease as well.

  20. Portfolios: possibilities for addressing emergency medicine resident competencies.

    PubMed

    O'Sullivan, Patricia; Greene, Constance

    2002-11-01

    Portfolios are an innovative approach to evaluate the competency of emergency medicine residents. Three key characteristics add to their attractiveness. First, portfolios draw from the resident's actual work. Second, they require self-reflection on the part of the resident. Third, they are inherently practice-based learning since residents must review and consider their practice in order to begin the portfolio. This paper illustrates five different applications of portfolios. First, portfolios are applied to evaluating specific competencies as part of the training of emergency physicians. While evaluating specific competencies, the portfolio captures aspects of the general competencies. Second, the article illustrates using portfolios as a way to address a specific residency review committee (RRC) requirement such as follow-ups. Third is a description of how portfolios can be used to evaluate resident conferences capturing the competency of practice-based learning and possibly other competencies such as medical knowledge and patient care. Fourth, the authors of the article designed a portfolio as a way to demonstrate clinical competence. Fifth, they elaborate as to how a continuous quality improvement project could be cast within the portfolio framework. They provide some guidance concerning issues to address when designing the portfolios. Portfolios are carefully structured and not haphazard collections of materials. Following criteria is important in maintaining the validity of the portfolio as well as contributing to reliability. The portfolios can enhance the relationship between faculty and residents since faculty will suggest cases, discuss anomalies, and interact with the residents around the portfolio. The authors believe that in general portfolios can cover many of the general competencies specified by the ACGME while still focusing on issues important to emergency medicine. The authors believe that portfolios provide an approach to evaluation commensurate

  1. Performance of salmon fishery portfolios across western North America

    PubMed Central

    Griffiths, Jennifer R; Schindler, Daniel E; Armstrong, Jonathan B; Scheuerell, Mark D; Whited, Diane C; Clark, Robert A; Hilborn, Ray; Holt, Carrie A; Lindley, Steven T; Stanford, Jack A; Volk, Eric C

    2014-01-01

    Quantifying the variability in the delivery of ecosystem services across the landscape can be used to set appropriate management targets, evaluate resilience and target conservation efforts. Ecosystem functions and services may exhibit portfolio-type dynamics, whereby diversity within lower levels promotes stability at more aggregated levels. Portfolio theory provides a framework to characterize the relative performance among ecosystems and the processes that drive differences in performance. We assessed Pacific salmon Oncorhynchus spp. portfolio performance across their native latitudinal range focusing on the reliability of salmon returns as a metric with which to assess the function of salmon ecosystems and their services to humans. We used the Sharpe ratio (e.g. the size of the total salmon return to the portfolio relative to its variability (risk)) to evaluate the performance of Chinook and sockeye salmon portfolios across the west coast of North America. We evaluated the effects on portfolio performance from the variance of and covariance among salmon returns within each portfolio, and the association between portfolio performance and watershed attributes. We found a positive latitudinal trend in the risk-adjusted performance of Chinook and sockeye salmon portfolios that also correlated negatively with anthropogenic impact on watersheds (e.g. dams and land-use change). High-latitude Chinook salmon portfolios were on average 2·5 times more reliable, and their portfolio risk was mainly due to low variance in the individual assets. Sockeye salmon portfolios were also more reliable at higher latitudes, but sources of risk varied among the highest performing portfolios. Synthesis and applications. Portfolio theory provides a straightforward method for characterizing the resilience of salmon ecosystems and their services. Natural variability in portfolio performance among undeveloped watersheds provides a benchmark for restoration efforts. Locally and regionally

  2. Performance of salmon fishery portfolios across western North America.

    PubMed

    Griffiths, Jennifer R; Schindler, Daniel E; Armstrong, Jonathan B; Scheuerell, Mark D; Whited, Diane C; Clark, Robert A; Hilborn, Ray; Holt, Carrie A; Lindley, Steven T; Stanford, Jack A; Volk, Eric C

    2014-12-01

    Quantifying the variability in the delivery of ecosystem services across the landscape can be used to set appropriate management targets, evaluate resilience and target conservation efforts. Ecosystem functions and services may exhibit portfolio-type dynamics, whereby diversity within lower levels promotes stability at more aggregated levels. Portfolio theory provides a framework to characterize the relative performance among ecosystems and the processes that drive differences in performance. We assessed Pacific salmon Oncorhynchus spp. portfolio performance across their native latitudinal range focusing on the reliability of salmon returns as a metric with which to assess the function of salmon ecosystems and their services to humans. We used the Sharpe ratio (e.g. the size of the total salmon return to the portfolio relative to its variability (risk)) to evaluate the performance of Chinook and sockeye salmon portfolios across the west coast of North America. We evaluated the effects on portfolio performance from the variance of and covariance among salmon returns within each portfolio, and the association between portfolio performance and watershed attributes. We found a positive latitudinal trend in the risk-adjusted performance of Chinook and sockeye salmon portfolios that also correlated negatively with anthropogenic impact on watersheds (e.g. dams and land-use change). High-latitude Chinook salmon portfolios were on average 2·5 times more reliable, and their portfolio risk was mainly due to low variance in the individual assets. Sockeye salmon portfolios were also more reliable at higher latitudes, but sources of risk varied among the highest performing portfolios. Synthesis and applications. Portfolio theory provides a straightforward method for characterizing the resilience of salmon ecosystems and their services. Natural variability in portfolio performance among undeveloped watersheds provides a benchmark for restoration efforts. Locally and regionally

  3. Portfolio assessment: practice teachers' early experience.

    PubMed

    Spence, William; El-Ansari, Walid

    2004-07-01

    Experience was recognised to be a vital source of learning as long ago as 1762 [Emile, Everyman, London, 1993] and reflection on practice experience may be one way forward in addressing nursing's anxieties concerning the practice theory gap. However, despite the acceptance that subjectivity in the process seems inevitable and potentially important, little is understood of the practitioner's experience of practice assessment. Two questionnaires sought the views of specialist community nursing practitioner (SCNP) programme (United Kingdom Central Council for Nursing, Midwifery and Health Visiting (UKCC) 2001) practice teachers (PTs) on the introduction of the portfolio approach to practice assessment. These were distributed to 62 and 76 PTs and the response rates were 32% and 50%, respectively. Responses of those PTs from the three specialisms participating in the piloting of the portfolio approach were compared with those using an existing approach. An action research method was adopted which attempted to use established theory to explain the challenges presented by the introduction of this approach and ultimately to raise the PT group's awareness of assessment issues. Both qualitative and quantitative data were collected and the findings support the use of the portfolio approach to practice assessment. The PT experience of portfolio use was found to be a largely positive one. PTs reported the utility of the portfolio in prompting student self-evaluation of learning. Concerns were expressed by PTs around the quality of portfolio evidence although many felt that it had promoted students' reflection on practice. Inter-PT reliability in practice assessment was identified as a topic for PT continuing professional development. Many sources of evidence, including patient feedback, were used by PTs in their assessment of students although PTs using the portfolio approach used less first-hand experience of students' practice in their assessments of competence, relying more

  4. Making practice transparent through e-portfolio.

    PubMed

    Stewart, Sarah M

    2013-12-01

    Midwives are required to maintain a professional portfolio as part of their statutory requirements. Some midwives are using open social networking tools and processes to develop an e-portfolio. However, confidentiality of patient and client data and professional reputation have to be taken into consideration when using online public spaces for reflection. There is little evidence about how midwives use social networking tools for ongoing learning. It is uncertain how reflecting in an e-portfolio with an audience impacts on learning outcomes. This paper investigates ways in which reflective midwifery practice be carried out using e-portfolio in open, social networking platforms using collaborative processes. Using an auto-ethnographic approach I explored my e-portfolio and selected posts that had attracted six or more comments. I used thematic analysis to identify themes within the textual conversations in the posts and responses posted by readers. The analysis identified that my collaborative e-portfolio had four themes: to provide commentary and discuss issues; to reflect and process learning; to seek advice, brainstorm and process ideas for practice, projects and research, and provide evidence of professional development. E-portfolio using open social networking tools and processes is a viable option for midwives because it facilitates collaborative reflection and shared learning. However, my experience shows that concerns about what people think, and client confidentiality does impact on the nature of open reflection and learning outcomes. I conclude this paper with a framework for managing midwifery statutory obligations using online public spaces and social networking tools. Copyright © 2013 Australian College of Midwives. Published by Elsevier Ltd. All rights reserved.

  5. Aligning the use of portfolios with digital badging.

    PubMed

    Doherty, Iain; Sharma, Neel

    2015-10-01

    While the place of portfolios in medical training is established, there are limits to their use. This article discusses the potential use of digital badges to complement portfolios, as these provide a transparent overview of a learner's level of competence.

  6. Implementing portfolio in postgraduate general practice training. Benefits and recommendations.

    PubMed

    Alotaibi, Fawaz S

    2012-10-01

    This paper presents a review to explore the literature focusing on portfolio in postgraduate general practice (GP) training, and to examine the impact of implementation of portfolio on learning process, as well as proposing recommendations for its implementation in postgraduate GP training. An electronic search was carried out on several databases for studies addressing portfolio in postgraduate GP training. Six articles were included to address specifically the effectiveness of portfolio in postgraduate GP training. Five of them described successful experiences of portfolio-based learning implementation. Only one article addressed portfolio-based assessment in postgraduate GP training. The existing evidence provides various benefits of professional portfolio-based learning. It does appear to have advantages of stimulating reflective learning, promoting proactive learning, and bridging the hospital experiences of the learners to GP. Moreover, the challenges to implementation of portfolio-based learning are often based on orientation and training of stakeholders.

  7. Career Portfolios--Don't Leave Home without One.

    ERIC Educational Resources Information Center

    Drier, Harry N.

    1997-01-01

    Discusses the benefits of career portfolios and stresses their importance to success in today's job market. Suggests approaching job search as a sales campaign. Offers a checklist of materials and information that should be in the portfolio. (JOW)

  8. The value of student portfolios to evaluate undergraduate nursing programs.

    PubMed

    Karlowicz, K A

    2000-01-01

    A growing trend in nursing education is the use of student portfolios for program evaluation. Incorporating portfolio analysis into a school's evaluation plan requires that faculty consider how the benefits and limitations of the portfolio development process impact the entire curriculum. The primary benefit of portfolio evaluation is that it permits the correlation of competencies attained by graduates with curricular outcomes. However, portfolio development also promotes increased student responsibility for learning, enhances faculty-student interaction, and facilitates changes in curriculum and instruction. The principal limitations of portfolio evaluation are the lack of research-based evidence that demonstrates the validity and reliability of portfolio analysis, time required to create a portfolio, and documentation storage.

  9. Student Portfolios: A Process/Product Learning and Assessment Strategy.

    ERIC Educational Resources Information Center

    Shackelford, Ray L.

    1996-01-01

    Investigates how student portfolios can be used as an effective strategy for improving and communicating desired competencies and foundation skills. Describes various types of portfolios such as showcase, descriptive, evaluative, and composite. (Author/JOW)

  10. Portfolio optimization with skewness and kurtosis

    NASA Astrophysics Data System (ADS)

    Lam, Weng Hoe; Jaaman, Saiful Hafizah Hj.; Isa, Zaidi

    2013-04-01

    Mean and variance of return distributions are two important parameters of the mean-variance model in portfolio optimization. However, the mean-variance model will become inadequate if the returns of assets are not normally distributed. Therefore, higher moments such as skewness and kurtosis cannot be ignored. Risk averse investors prefer portfolios with high skewness and low kurtosis so that the probability of getting negative rates of return will be reduced. The objective of this study is to compare the portfolio compositions as well as performances between the mean-variance model and mean-variance-skewness-kurtosis model by using the polynomial goal programming approach. The results show that the incorporation of skewness and kurtosis will change the optimal portfolio compositions. The mean-variance-skewness-kurtosis model outperforms the mean-variance model because the mean-variance-skewness-kurtosis model takes skewness and kurtosis into consideration. Therefore, the mean-variance-skewness-kurtosis model is more appropriate for the investors of Malaysia in portfolio optimization.

  11. Student Evaluations of the Portfolio Process

    PubMed Central

    Airey, Tatum C.; Bisso, Andrea M.; Slack, Marion K.

    2011-01-01

    Objective. To evaluate pharmacy students’ perceived benefits of the portfolio process and to gather suggestions for improving the process. Methods. A questionnaire was designed and administered to 250 first-, second-, and third-year pharmacy students at the University of Arizona College of Pharmacy. Results. Although the objectives of the portfolio process were for students to understand the expected outcomes, understand the impact of extracurricular activities on attaining competencies, identify what should be learned, identify their strengths and weaknesses, and modify their approach to learning, overall students perceived the portfolio process as having less than moderate benefit. First-year students wanted more examples of portfolios while second- and third-year students suggested that more time with their advisor would be beneficial. Conclusions. The portfolio process will continue to be refined and efforts made to improve students’ perceptions of the process as it is intended to develop the self-assessments skills they will need to improve their knowledge and professional skills throughout their pharmacy careers. PMID:21969718

  12. Application Problem of Biomass Combustion in Greenhouses for Crop Production

    NASA Astrophysics Data System (ADS)

    Kawamura, Atsuhiro; Akisawa, Atsushi; Kashiwagi, Takao

    It is consumed much energy in fossil fuels to production crops in greenhouses in Japan. And fl ue gas as CO2 fertilization is used for growing crops in modern greenhouses. If biomass as renewable energy can use for production vegetables in greenhouses, more than 800,000 kl of energy a year (in crude oil equivalent) will be saved. In this study, at fi rst, we made the biomass combustion equipment, and performed fundamental examination for various pellet fuel. We performed the examination that considered an application to a real greenhouse next. We considered biomass as both a source of energy and CO2 gas for greenhouses, and the following fi ndings were obtained: 1) Based on the standard of CO2 gas fertilization to greenhouses, it is diffi cult to apply biomass as a CO2 fertilizer, so that biomass should be applied to energy use only, at least for the time being. 2) Practical biomass energy machinery for economy, high reliability and greenhouses satisfying the conservatism that it is easy is necessary. 3) It is necessary to develop crop varieties and cultivation systems requiring less strict environmental control. 4) Disposal of combustion ash occurring abundantly, effective practical use is necessary.

  13. The Effect of Mobile Portfolio (M-Portfolio) Supported Mastery Learning Model on Students' Achievement and Their Attitudes towards Using Internet

    ERIC Educational Resources Information Center

    Ozdemir, Oguzhan; Erdemci, Husamettin

    2017-01-01

    The term mobile portfolio refers to creating, evaluating and sharing portfolios in mobile environments. Many of the states that pose an obstacle for portfolio usage are now extinguished through mobile portfolios. The aim in this research is to determine the effect of mobile portfolio supported mastery learning model on students' success and…

  14. Asset Allocation and Optimal Contract for Delegated Portfolio Management

    NASA Astrophysics Data System (ADS)

    Liu, Jingjun; Liang, Jianfeng

    This article studies the portfolio selection and the contracting problems between an individual investor and a professional portfolio manager in a discrete-time principal-agent framework. Portfolio selection and optimal contracts are obtained in closed form. The optimal contract was composed with the fixed fee, the cost, and the fraction of excess expected return. The optimal portfolio is similar to the classical two-fund separation theorem.

  15. A model of engagement in reflective writing-based portfolios: Interactions between points of vulnerability and acts of adaptability.

    PubMed

    Arntfield, Shannon; Parlett, Brittney; Meston, Christine N; Apramian, Tavis; Lingard, Lorelei

    2016-01-01

    Portfolios are widely used for meeting new accreditation standards in the age of competency-based medicine. However, the method of learning through portfolio has been suggested to be vulnerable. The aim of this study was to explore conditions affecting the experience of teaching and learning from the perspective of both students and mentors in a reflective writing-based portfolio initiative. Using mixed-methods rooted in grounded theory, 139 students and 13 mentors completed questionnaires, 23 students participated in four focus groups and 9 mentors in individual interviews. The overarching theme in our data was student-mentor engagement. Our results confirm previous literature describing portfolio as a vulnerable method of learning, extend this concept by identifying and categorizing specific points of vulnerability, and contribute new knowledge regarding acts of adaptability, which serve to strengthen the student-mentor relationship. Engagement is central to the success of portfolio and is shaped by a dynamic interaction between points of vulnerability and acts of adaptability. We propose a model of engagement in portfolio that can be used for faculty development to optimize student-mentor engagement.

  16. Has your greenhouse gone virtual?

    USDA-ARS?s Scientific Manuscript database

    Virtual Grower is a free decision-support software program available from USDA-ARS that allows growers to build a virtual greenhouse. It was initially designed to help greenhouse growers estimate heating costs and conduct simple simulations to figure out where heat savings could be achieved. Featu...

  17. Real-world datasets for portfolio selection and solutions of some stochastic dominance portfolio models.

    PubMed

    Bruni, Renato; Cesarone, Francesco; Scozzari, Andrea; Tardella, Fabio

    2016-09-01

    A large number of portfolio selection models have appeared in the literature since the pioneering work of Markowitz. However, even when computational and empirical results are described, they are often hard to replicate and compare due to the unavailability of the datasets used in the experiments. We provide here several datasets for portfolio selection generated using real-world price values from several major stock markets. The datasets contain weekly return values, adjusted for dividends and for stock splits, which are cleaned from errors as much as possible. The datasets are available in different formats, and can be used as benchmarks for testing the performances of portfolio selection models and for comparing the efficiency of the algorithms used to solve them. We also provide, for these datasets, the portfolios obtained by several selection strategies based on Stochastic Dominance models (see "On Exact and Approximate Stochastic Dominance Strategies for Portfolio Selection" (Bruni et al. [2])). We believe that testing portfolio models on publicly available datasets greatly simplifies the comparison of the different portfolio selection strategies.

  18. Mars inflatable greenhouse analog.

    PubMed

    Sadler, Philip D; Giacomelli, Gene A

    2002-01-01

    Light intensities on the Martian surface can possibly support a bioregenerative life support system (BLSS) utilizing natural sunlight for hydroponic crop production, if a suitable controlled environment can be provided. Inflatable clear membrane structures offer low mass, are more easily transported than a rigid structure, and are good candidates for providing a suitable controlled environment for crop production. Cable culture is one hydroponic growing system that can take advantage of the beneficial attributes of the inflatable structure. An analog of a Mars inflatable greenhouse can provide researchers data on issues such as crew time requirements for operation, productivity for BLSS, human factors, and much more at a reasonable cost. This is a description of one such design.

  19. The greenhouse of Titan.

    NASA Technical Reports Server (NTRS)

    Sagan, C.

    1973-01-01

    Analysis of non-gray radiative equilibrium and gray convective equilibrium on Titan suggests that a massive molecular-hydrogen greenhouse effect may be responsible for the disagreement between the observed IR temperatures and the equilibrium temperature of an atmosphereless Titan. Calculations of convection indicate a probable minimum optical depth of 14 which corresponds to a molecular hydrogen shell of substantial thickness with total pressures of about 0.1 bar. It is suggested that there is an equilibrium between outgassing and blow-off on the one hand and accretion from the protons trapped in a hypothetical Saturnian magnetic field on the other, in the present atmosphere of Titan. It is believed that an outgassing equivalent to the volatilization of a few kilometers of subsurface ice is required to maintain the present blow-off rate without compensation for all geological time. The presence of an extensive hydrogen corona around Titan is postulated, with surface temperatures up to 200 K.

  20. Using Portfolios as a Capstone Assessment in TESL Programs.

    ERIC Educational Resources Information Center

    MacDonald, Marguerite G.

    Use of portfolios for student evaluation has expanded in recent years to assessment of student progress in training to teach English as a Second Language (TESL). At Wright State University (Ohio), portfolio assessment is part of both undergraduate and graduate level ESL teaching programs. As at other institutions, portfolio development is being…