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1

Analyzing Fuel Saving Opportunities through Driver Feedback Mechanisms...  

Office of Environmental Management (EM)

Fuel Saving Opportunities through Driver Feedback Mechanisms 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

2

Mechanical feedback in the molecular ISM of luminous IR galaxies  

E-Print Network (OSTI)

Aims: Molecular emission lines originating in the nuclei of luminous infra-red galaxies are used to determine the physical properties of the nuclear ISM in these systems. Methods: A large observational database of molecular emission lines is compared with model predictions that include heating by UV and X-ray radiation, mechanical heating, and the effects of cosmic rays. Results: The observed line ratios and model predictions imply a separation of the observedsystems into three groups: XDRs, UV-dominated high-density (n>=10^5 cm-3) PDRs, and lower-density (n=10^4.5 cm-3) PDRs that are dominated by mechanical feedback. Conclusions: The division of the two types of PDRs follows naturally from the evolution of the star formation cycle of these sources, which evolves from deeply embedded young stars, resulting in high-density (n>=10^5 cm-3) PDRs, to a stage where the gas density has decreased (n=10^4.5 cm-3) and mechanical feedback from supernova shocks dominates the heating budget.

A. F. Loenen; M. Spaans; W. A. Baan; R. Meijerink

2008-08-20T23:59:59.000Z

3

The Digitization of Word-of-mouth: Promise and Challenges of Online Feedback Mechanisms  

E-Print Network (OSTI)

Online feedback mechanisms harness the bi-directional communication capabilities of the Internet in order to engineer large-scale word-of-mouth networks. Best known so ...

Dellarocas, Chrysanthos

2003-04-14T23:59:59.000Z

4

Macroeconomic Activity Module  

Gasoline and Diesel Fuel Update (EIA)

This page intentionally left blank This page intentionally left blank 19 U.S. Energy Information Administration | Assumptions to the Annual Energy Outlook2011 Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module.

5

A Mechanism for Land–Atmosphere Feedback Involving Planetary Wave Structures  

Science Journals Connector (OSTI)

While the ability of land surface conditions to influence the atmosphere has been demonstrated in various modeling and observational studies, the precise mechanisms by which land–atmosphere feedback occurs are still largely unknown: particularly ...

Randal D. Koster; Yehui Chang; Siegfried D. Schubert

2014-12-01T23:59:59.000Z

6

Essays in macroeconomics and experiments  

E-Print Network (OSTI)

This dissertation consists of four chapters on empirical and experimental macroeconomics and other experimental topics. Chapter 1 uses a laboratory experiment to test the predictions of a dynamic global game designed to ...

Shurchkov, Olga

2008-01-01T23:59:59.000Z

7

Essays on liquidity in macroeconomics  

E-Print Network (OSTI)

This thesis includes four essays on the macroeconomic effects of financial market imperfections. The first essay studies the incentives for banks that participate in an interbank market to keep a sufficient level of reserves. ...

Lorenzoni, Guido

2001-01-01T23:59:59.000Z

8

Essays on the stock market's reaction to macroeconomic news  

E-Print Network (OSTI)

3.2.2 Macroeconomics News Data . . . . . . . . . . . . . . .of Unanticipated News Persist? . . . . . . . . . . . . .for the Macroeconomic News Variables . . . . . . . Table 3.4

Cenesizoglu, Tolga

2006-01-01T23:59:59.000Z

9

Version pressure feedback mechanisms for speculative versioning caches  

DOE Patents (OSTI)

Mechanisms are provided for controlling version pressure on a speculative versioning cache. Raw version pressure data is collected based on one or more threads accessing cache lines of the speculative versioning cache. One or more statistical measures of version pressure are generated based on the collected raw version pressure data. A determination is made as to whether one or more modifications to an operation of a data processing system are to be performed based on the one or more statistical measures of version pressure, the one or more modifications affecting version pressure exerted on the speculative versioning cache. An operation of the data processing system is modified based on the one or more determined modifications, in response to a determination that one or more modifications to the operation of the data processing system are to be performed, to affect the version pressure exerted on the speculative versioning cache.

Eichenberger, Alexandre E.; Gara, Alan; O'Brien, Kathryn M.; Ohmacht, Martin; Zhuang, Xiaotong

2013-03-12T23:59:59.000Z

10

14.05 Intermediate Applied Macroeconomics, Fall 2002  

E-Print Network (OSTI)

Uses the tools of macroeconomics to study three macroeconomic policy problems in depth. Possible topics include long-run economic growth, the macroeconomics of the transition to a modern capitalist society, federal government ...

Temin, Peter

11

Health and Health Care, Macroeconomics of  

Science Journals Connector (OSTI)

Abstract Macroeconomics can have a measurable impact on health and health care. The aim of this article is to introduce the macroeconomics of health and health care. The article will outline the core features and terms related to macroeconomics, as distinct from microeconomics, and then give an overview of the relationship between the macroeconomy and health and health care. It will thus consider, for example, the relationship between health care expenditure and national income, and provide an overview of the routes through which greater macroeconomic integration at the global level may impact on health and health care via international trade.

R. Smith

2014-01-01T23:59:59.000Z

12

International Macroeconomic Data Set | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

International Macroeconomic Data Set International Macroeconomic Data Set Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data International Macroeconomic Data Set Dataset Summary Description The International Macroeconomic Data Set provides data from 1969 through 2020 for real (adjusted for inflation) gross domestic product (GDP), population, real exchange rates, and other variables for the 190 countries and 34 regions that are most important for U.S. agricultural trade. The data presented here are a key component of the USDA Baseline projections process, and can be used as a benchmark for analyzing the impacts of U.S. and global macroeconomic shocks. The data for the Baseline projections are updated once a year to reflect the assumptions used for the Baseline. The historical data will be revised several times a year as the underlying data evolve.

13

Macroeconomic Real Gross Domestic Product  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Macroeconomic Real Gross Domestic Product (billion chained 2009 dollars - SAAR) ............. 15,584 15,680 15,819 15,886 15,970 16,068 16,173 16,295 16,422 16,557 16,701 16,832 15,742 16,127 16,628 Real Disposable Personal Income (billion chained 2009 dollars - SAAR) ............. 11,502 11,618 11,703 11,757 11,883 11,970 12,057 12,151 12,273 12,363 12,451 12,526 11,645 12,015 12,403 Real Personal Consumption Expend. (billion chained 2009 dollars - SAAR) ............. 10,644 10,692 10,729 10,813 10,884 10,959 11,036 11,114 11,191 11,264 11,343 11,416 10,719 10,998 11,304 Real Fixed Investment (billion chained 2009 dollars - SAAR) ............. 2,420 2,458 2,491 2,508 2,551 2,604 2,655 2,700 2,752 2,816 2,885 2,944 2,469 2,627 2,849 Business Inventory Change (billion chained 2009 dollars - SAAR) .............

14

Essays on political institutions and macroeconomics  

E-Print Network (OSTI)

This dissertation consists of three chapters on the interaction of political institutions and macroeconomic activity in dynamic environments. Chapter 1 studies the optimal management of taxes and debt in a framework which ...

Yared, Pierre

2007-01-01T23:59:59.000Z

15

Essays in macroeconomics and corporate finance  

E-Print Network (OSTI)

This thesis examines questions at the intersection of macroeconomics and finance. Chapter 1 studies the persistent effects of a decrease in firms' ability to borrow. I develop a tractable model of deleveraging that emphasizes ...

Goldberg, Jonathan E. (Jonathan Elliot)

2011-01-01T23:59:59.000Z

16

Essays on macroeconomic risks and stock prices  

E-Print Network (OSTI)

In this thesis, I study the relationship between macroeconomic risks and asset prices. In the first chapter, I establish that inflation risk is priced in the cross-section of stock returns: stocks that have low returns ...

Duarte, Fernando Manuel

2011-01-01T23:59:59.000Z

17

Macroeconomics and Health: Investing in Health for  

E-Print Network (OSTI)

Macroeconomics and Health: Investing in Health for Economic Development #12;Information concerning be obtained from: World Health Organization Marketing and Dissemination 1211 Geneva 27, Switzerland tel: (41 clear and strong on the central task of raising the health of the poor. I can be `realistic

18

APEX-CHAMP+ high-J CO observations of low-mass young stellar objects: IV. Mechanical and radiative feedback  

E-Print Network (OSTI)

During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Our aim is to quantify the feedback, mechanical and radiative, for a large sample of low-mass sources. The outflow activity is compared to radiative feedback in the form of UV heating by the accreting protostar to search for correlations and evolutionary trends. Large-scale maps of 26 young stellar objects, which are part of the Herschel WISH key program are obtained using the CHAMP+ instrument on the APEX (12CO and 13CO 6-5), and the HARP-B instrument on the JCMT (12CO and 13CO 3-2). Maps are used to determine outflow parameters and envelope models are used to quantify the amount of UV-heated gas and its temperature from 13CO 6-5 observations. All sources in our sample show outflow activity and the outflow force, F_CO, is larger for Class 0 sources than for Class I sources, even if their luminosities are comparable. The outflowing gas typically extends to much greater ...

Y?ld?z, Umut A; van Dishoeck, Ewine F; Hogerheijde, Michiel R; Karska, Agata; Belloche, Arnaud; Endo, Akira; Frieswijk, Wilfred; Güsten, Rolf; van Kempen, Tim A; Leurini, Silvia; Nagy, Zsofia; Pérez-Beaupuits, Juan-Pablo; Risacher, Christophe; van der Marel, Nienke; van Weeren, Reinout J; Wyrowski, Friedrich

2015-01-01T23:59:59.000Z

19

Ecological macroeconomics: An application to climate change  

Science Journals Connector (OSTI)

Ecological economics has not paid sufficient attention to the macroeconomic level both in terms of theory and modeling. Yet, key topics debated in the field of ecological economics such as sustainable consumption, reduction in working time, the degrowth debate, the energy–exergy link, and the rebound effect require a holistic and macro perspective. While this deficiency has been identified before and Keynesian economics has been generally suggested as a potent vehicle to establish economic systemic thinking, very little concrete theorizing and practical suggestions have been put forward. We give further credence to this suggestion and demonstrate the value of tackling key concerns of ecological economics within a Keynesian growth framework. Contextualized by an application to climate change we suggest that policy relevant recommendations need to be based on a consistent view of the macroeconomy. We end with laying out key building blocks for a Keynesian model framework for an ecological macroeconomics.

Armon Rezai; Lance Taylor; Reinhard Mechler

2013-01-01T23:59:59.000Z

20

Bifurcation Analysis of Zellner's Marshallian Macroeconomic Model  

E-Print Network (OSTI)

) model and later an autoregressive leading indicator world income (ARLI/WI) model for eighteen industrialized countries combined with the use of the Bayesian shrinkage technique (see Zellner (1997), Zellner and Min (1999) and Zellner and Palm (2004... (1999), several microeconomic and macroeconomic in uences on entry and exit are studied empirically with reference to the the case of the Finnish manufacturing industry. Panel data for three digit industries covering the six year period between 1988...

Banerjee, Sanjibani

2011-02-03T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Energy Production and Trade: An Overview of Some Macroeconomic...  

U.S. Energy Information Administration (EIA) Indexed Site

Energy Production and Trade: An Overview of Some Macroeconomic Issues Vipin Arora November 2014 Independent Statistics & Analysis www.eia.gov U.S. Energy Information Administration...

22

Towards simulating star formation in turbulent high-z galaxies with mechanical supernova feedback  

E-Print Network (OSTI)

Feedback from supernovae is essential to understanding the self-regulation of star formation in galaxies. However, the efficacy of the process in a cosmological context remains unclear due to excessive radiative losses during the shock propagation. To better understand the impact of SN explosions on the evolution of galaxies, we perform a suite of high-resolution (12 pc), zoom-in cosmological simulations of a Milky Way-like galaxy at z=3 with adaptive mesh refinement. We find that SN explosions can efficiently regulate star formation, leading to the stellar mass and metallicity consistent with the observed mass-metallicity relation and stellar mass-halo mass relation at z~3. This is achieved by making three important changes to the classical feedback scheme: i) the different phases of SN blast waves are modelled directly by injecting radial momentum expected at each stage, ii) the realistic time delay of SNe, commencing at as early as 3 Myr, is required to disperse very dense gas before a runaway collapse set...

Kimm, Taysun; Devriendt, Julien; Dubois, Yohan; Slyz, Adrianne

2015-01-01T23:59:59.000Z

23

EIA-Assumptions to the Annual Energy Outlook - Macroeconomic Activity  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module Macroeconomic Activity Module Assumptions to the Annual Energy Outlook 2007 Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Documentation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System, DOE/EIA-M065(2007), (Washington, DC, January 2007).

24

EIA - Assumptions to the Annual Energy Outlook 2009 - Macroeconomic  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module Macroeconomic Activity Module Assumptions to the Annual Energy Outlook 2010 Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Document>ation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System, DOE/EIA-M065(2009), (Washington, DC, January 2009).

25

EIA - Assumptions to the Annual Energy Outlook 2008 - Macroeconomic  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module Macroeconomic Activity Module Assumptions to the Annual Energy Outlook 2008 Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Documentation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System, DOE/EIA-M065(2007), (Washington, DC, January 2007).

26

EIA - Assumptions to the Annual Energy Outlook 2009 - Macroeconomic  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module Macroeconomic Activity Module Assumptions to the Annual Energy Outlook 2009 Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Documentation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System, DOE/EIA-M065(2008), (Washington, DC, January 2008).

27

The National Energy Modeling System: An Overview 2000 - Macroeconomic  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic assessment at EIA involves several modes of analysis. The first type of analysis, used in forecasting the Annual Energy Outlook where energy prices change, uses kernel regression and response surface techniques to mimic the response of larger macroeconomic and industrial models. This mode of analysis requires a given economic baseline and then calculates the economic impacts of changing energy prices, calculated from the chosen growth path. The economic growth cases are derived from the larger core models and can reflect either high, low, or reference case growth assumptions. Analyzing economic impacts from energy price changes uses the macroeconomic activity module (MAM) within NEMS and provides a subset of the macroeconomic variables available in the larger core models. The composition of the subset is determined by the other energy modules in NEMS, as they use various macroeconomic concepts as assumptions to their particular energy model.

28

Mechanisms of Performance Enhancement With Force Feedback Christopher R. Wagner Robert D. Howe  

E-Print Network (OSTI)

by the instrument and to reduce unwanted motions that exceed a force threshold [3]. Virtual environments have also or the interface mechanism. Finger and wrist impedance models have been developed to examine keyboard design [6

29

EIA - The National Energy Modeling System: An Overview 2003-Macroeconomic  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module Macroeconomic Activity Module The National Energy Modeling System: An Overview 2003 Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) links NEMS to the rest of the economy by providing projections of economic driver variables for use by the supply, demand, and conversion modules of NEMS. The derivation of the baseline macroeconomic forecast lays a foundation for the determination of the energy demand and supply forecast. MAM is used to present alternative macroeconomic growth cases to provide a range of uncertainty about the growth potential for the economy and its likely consequences for the energy system. MAM is also able to address the macroeconomic impacts associated with changing energy market conditions, such as alternative world oil price assumptions. Outside of the Annual Energy Outlook setting, MAM represents a system of linked modules which can assess the potential impacts on the economy of changes in energy events or policy proposals. These economic impacts then feed back into NEMS for an integrated solution. MAM consists of five modules:

30

Assumptions to the Annual Energy Outlook 2001 - Macroeconomic Activity  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Documentation Report: Macroeconomic Activity Module

31

Assumptions to the Annual Energy Outlook 1999 - Macroeconomic Activity  

Gasoline and Diesel Fuel Update (EIA)

macroeconomic.gif (5367 bytes) macroeconomic.gif (5367 bytes) The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Documentation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System, DOE/EIA-M065, (Washington, DC, February 1994).

32

14.452 Macroeconomic Theory II, Spring 2002  

E-Print Network (OSTI)

The basic machines of macroeconomics. Ramsey, Solow, Samuelson-Diamond, RBCs, ISLM, Mundell-Fleming, Fischer-Taylor. How they work, what shortcuts they take, and how they can be used. Half-term subject. From the course ...

Blanchard, Olivier (Olivier J.)

33

14.02 Principles of Macroeconomics, Fall 2009  

E-Print Network (OSTI)

This course is designed to introduce classic macroeconomic issues such as growth, inflation, unemployment, interest rates, exchange rates, technological progress, and budget deficits. The course will provide a unified ...

Guerrieri, Veronica

34

Essays on the stock market's reaction to macroeconomic news  

E-Print Network (OSTI)

Macroeconomic News Variables 21. PCE, M/M %Change, (SAAR, %)Capacity Utilization Rate 21. PCE 20. New Home Sales 24. NewAdv. Durables Investment 21. PCE 20. New Home Sales R 2 19.

Cenesizoglu, Tolga

2006-01-01T23:59:59.000Z

35

Macroeconomics: A Survey of Laboratory Research Department of Economics  

E-Print Network (OSTI)

experimentation to produce crucial data. This is particularly true of macroeconomics." Christopher A. Sims (1996 (1982). Even these experimental exercises have been ruled out as unacceptable by some. Sims again (1996

Tesfatsion, Leigh

36

14.452 Macroeconomic Theory II, Spring 2005  

E-Print Network (OSTI)

The basic machines of macroeconomics. Ramsey, Solow, Samuelson-Diamond, RBCs, ISLM, Mundell-Fleming, Fischer-Taylor. How they work, what shortcuts they take, and how they can be used. Half-term subject. From the course ...

Blanchard, Olivier (Olivier J.)

37

Assumptions to the Annual Energy Outlook 2002 - Macroeconomic Activity  

Gasoline and Diesel Fuel Update (EIA)

Macroeconomic Activity Module The Macroeconomic Activity Module (MAM) represents the interaction between the U.S. economy as a whole and energy markets. The rate of growth of the economy, measured by the growth in gross domestic product (GDP) is a key determinant of the growth in demand for energy. Associated economic factors, such as interest rates and disposable income, strongly influence various elements of the supply and demand for energy. At the same time, reactions to energy markets by the aggregate economy, such as a slowdown in economic growth resulting from increasing energy prices, are also reflected in this module. A detailed description of the MAM is provided in the EIA publication, Model Documentation Report: Macroeconomic Activity Module

38

The Declining Equity Premium: What Role Does Macroeconomic Risk Play?  

E-Print Network (OSTI)

-dividend and price-earnings ratios remain well above their historical norms. More formally, the recent run of Pennsylvania and NBER Aggregate stock prices, relative to virtually any indicator of fundamental value, soared historical norms. Why? We consider one particular explanation: a fall in macroeconomic risk

Kahana, Michael J.

39

Introduction to Macroeconomic Dynamics Special Issue on Oil Price Shocks  

E-Print Network (OSTI)

Introduction to Macroeconomic Dynamics Special Issue on Oil Price Shocks Apostolos Serletisy in macroeconometrics and ...nancial econometrics to investigate the e¤ects of oil price shocks and uncertainty about the price of oil on the level of economic activity. JEL classi...cation: G31, E32, C32. Keywords: Oil price

Garousi, Vahid

40

The effects of palmar feedback in 200mm Reticle Standard Mechanical Interface (SMIF) Pod handles with respect to hand pressure distribution and user preference  

E-Print Network (OSTI)

, performance, and logistics. However, many companies have seen that environmental, safety, and health (ESH) can result in major fabrication tool and process modifications. These modifications usually occur after equipment purchase, process design... required a notebook computer, LabVIEW data acquisition hardware and software, eight Futek 1610 button load cells, and SPSS statistical analysis software. In order to make the non-feedback/feedback comparison, the PSNI-Palm Feedback was developed...

Nelson, Pisces Shenique

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Methodology for the Assessment of the Macroeconomic Impacts of Stricter CAF. Standards  

Gasoline and Diesel Fuel Update (EIA)

For For a full documentation of the macroeconomic linkage refer to "Model Documentation Report: Macroeconomic Activity Module (MAM) of the National Energy Modeling System," January 2002 found on the EIA web site at http://tonto.eia.doe.gov/FTPROOT/modeldoc/m065(2002).pdf Methodology for the Assessment of the Macroeconomic Impacts of Stricter CAFÉ Standards This assessment of the economic impacts of CAFÉ standards marks the first time EIA has used the new direct linkage of the DRI-WEFA Macroeconomic Model to NEMS in a policy setting. This methodology assures an internally consistent solution between the energy market concepts forecast by NEMS and the aggregate economy as forecast by the DRI-WEFA Macroeconomic Model of the U.S. Economy. While we refer to DRI- WEFA model as a macro model, the full DRI-WEFA model forecasts more than 1600 detailed concepts covering

42

ESTIMATE OF THE TOTAL MECHANICAL FEEDBACK ENERGY FROM GALAXY CLUSTER-CENTERED BLACK HOLES: IMPLICATIONS FOR BLACK HOLE EVOLUTION, CLUSTER GAS FRACTION, AND ENTROPY  

SciTech Connect

The total feedback energy injected into hot gas in galaxy clusters by central black holes can be estimated by comparing the potential energy of observed cluster gas profiles with the potential energy of non-radiating, feedback-free hot gas atmospheres resulting from gravitational collapse in clusters of the same total mass. Feedback energy from cluster-centered black holes expands the cluster gas, lowering the gas-to-dark-matter mass ratio below the cosmic value. Feedback energy is unnecessarily delivered by radio-emitting jets to distant gas far beyond the cooling radius where the cooling time equals the cluster lifetime. For clusters of mass (4-11) x 10{sup 14} M{sub sun}, estimates of the total feedback energy, (1-3) x 10{sup 63} erg, far exceed feedback energies estimated from observations of X-ray cavities and shocks in the cluster gas, energies gained from supernovae, and energies lost from cluster gas by radiation. The time-averaged mean feedback luminosity is comparable to those of powerful quasars, implying that some significant fraction of this energy may arise from the spin of the black hole. The universal entropy profile in feedback-free gaseous atmospheres in Navarro-Frenk-White cluster halos can be recovered by multiplying the observed gas entropy profile of any relaxed cluster by a factor involving the gas fraction profile. While the feedback energy and associated mass outflow in the clusters we consider far exceed that necessary to stop cooling inflow, the time-averaged mass outflow at the cooling radius almost exactly balances the mass that cools within this radius, an essential condition to shut down cluster cooling flows.

Mathews, William G.; Guo Fulai, E-mail: mathews@ucolick.org [University of California Observatories/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)

2011-09-10T23:59:59.000Z

43

Web Feedback & Questions - Hanford Site  

NLE Websites -- All DOE Office Websites (Extended Search)

Web Feedback & Questions Web Feedback & Questions Web Feedback & Questions Web Feedback & Questions Email Email Page | Print Print Page |Text Increase Font Size Decrease Font Size...

44

Quantifying Carbon Cycle Feedbacks  

Science Journals Connector (OSTI)

Perturbations to the carbon cycle could constitute large feedbacks on future changes in atmospheric CO2 concentration and climate. This paper demonstrates how carbon cycle feedback can be expressed in formally similar ways to climate feedback, ...

J. M. Gregory; C. D. Jones; P. Cadule; P. Friedlingstein

2009-10-01T23:59:59.000Z

45

AgentAgent--Based Computational ModelingBased Computational Modeling and Macroeconomicsand Macroeconomics  

E-Print Network (OSTI)

experimental study of macroeconomic systems #12;3 Macro regularities arise from local interactions among micro of interaction networks;Endogenous formation of interaction networks; AutonomyAutonomy (self-activation and self

Tesfatsion, Leigh

46

A Novel Harmony Search Algorithm for One-Year-Ahead Energy Demand Estimation Using Macroeconomic Variables  

Science Journals Connector (OSTI)

In this paper we tackle a problem of one-year ahead energy demand estimation from macroeconomic variables. A modified Harmony ... the proposed approach in a real problem of Energy demand estimation in Spain, from...

Sancho Salcedo-Sanz…

2014-01-01T23:59:59.000Z

47

Feedback coordination of limited capability mobile robots  

Science Journals Connector (OSTI)

In some multi-robot applications, such as exploration, predefined task allocation and coordination can fail to function adequately. This failure is attributed to the inability to completely model a robot's interactions with the environment before task execution. Hence, the main focus of this paper is on a feedback coordination mechanism that executes periodically after initial task allocation. This feedback mechanism monitors the individual and group performance of worker robots. If the performance of a worker robot is unsatisfactory, a task reallocation algorithm adjusts the task-robot combinations of the team. Three cases of unsatisfactory robot performance that can be detected by the feedback mechanism include: complete failure, partial failure and poor performance. The task allocation and coordination strategy are applied to a multi-robot exploration task. Initial results from experiments in various types of environments indicate that the feedback coordination mechanism successfully identifies the three forms of robot failure, and improves the system's performance.

Praneel Chand; Dale A. Carnegie

2010-01-01T23:59:59.000Z

48

Three Essays on Price Dynamics and Causations among Energy Markets and Macroeconomic Information  

E-Print Network (OSTI)

of within-sample-fit. The result supports innovation accounting analysis based on DAGs using residuals of out-of-sample-forecast. Second, we look at the effects of the federal fund rate and/or WTI crude oil price shock on US macroeconomic and financial...

Hong, Sung Wook 1977-

2012-09-20T23:59:59.000Z

49

Feedback stabilization initiative  

SciTech Connect

Much progress has been made in attaining high confinement regimes in magnetic confinement devices. These operating modes tend to be transient, however, due to the onset of MHD instabilities, and their stabilization is critical for improved performance at steady state. This report describes the Feedback Stabilization Initiative (FSI), a broad-based, multi-institutional effort to develop and implement methods for raising the achievable plasma betas through active MHD feedback stabilization. A key element in this proposed effort is the Feedback Stabilization Experiment (FSX), a medium-sized, national facility that would be specifically dedicated to demonstrating beta improvement in reactor relevant plasmas by using a variety of MHD feedback stabilization schemes.

NONE

1997-06-01T23:59:59.000Z

50

Feedback | Open Energy Information  

Open Energy Info (EERE)

Feedback Jump to: navigation, search Retrieved from "http:en.openei.orgwindex.php?titlePrueba2&oldid313186" Category: En Espaol...

51

Oil commodity returns and macroeconomic factors: A time-varying approach  

Science Journals Connector (OSTI)

Abstract This paper analyses the dynamic influence of macroeconomic factors on oil commodity returns (crude oil and heating oil) shown in monthly data over the period of 1990–2013. Using a time-varying parameter model via the Kalman filter, we find that macroeconomic factors are relevant for explaining oil commodity returns. We find that multilateral exchange rates have a negative effect on commodity returns. We confirm the existence of a strong linkage between energy and non-energy commodities. More importantly, we find shifts in global demand and SP500 effects that are not identified through the constant parameter model. These variables have had a progressively positive effect on oil commodity returns, especially since 2008.

Christophe Schalck; Régis Chenavaz

2015-01-01T23:59:59.000Z

52

Qubit state guidance without feedback  

E-Print Network (OSTI)

We study a protocol for two-qubit state guidance that does not rely on feedback mechanisms. In our scheme, entanglement can be concentrated by arranging the interactions of the qubits with a continuous variable ancilla. By properly post-selecting the outcomes of repeated measurements of the state of the ancilla, the qubit state is driven to have a desired amount of purity and entanglement. We stress the primary role played by the first iterations of the protocol. Inefficiencies in the detection operations can be fully taken into account.

Mauro Paternostro; M. S. Kim

2004-10-04T23:59:59.000Z

53

16th CONFERENCE OF THE RESEARCH NETWORK MACROECONOMICS AND  

E-Print Network (OSTI)

and accompanied by market- friendly (de)regulatory mechanisms mainly founded on the belief that liberalised systemic failures and their consequences in the capitalist economy. Keywords: Financial liberalisation of financial liberalisation-modernisation policies implemented all around the World since the 1970s. Its scope

Boyer, Edmond

54

Visual Feedback in a Coordinated Hand-Eye System  

E-Print Network (OSTI)

A system is proposed for the development of new techniques for the control and monitoring of a mechanical arm-hand. The use of visual feedback is seen to provide new interactive capabilities in a machine hand-eye system. ...

Woodham, Robert J.

55

Global climate feedbacks  

SciTech Connect

The important physical, chemical, and biological events that affect global climate change occur on a mesoscale -- requiring high spatial resolution for their analysis. The Department of Energy has formulated two major initiatives under the US Global Change Program: ARM (Atmospheric Radiation Measurements), and CHAMMP (Computer Hardware Advanced Mathematics and Model Physics). ARM is designed to use ground and air-craft based observations to document profiles of atmospheric composition, clouds, and radiative fluxes. With research and models of important physical processes, ARM will delineate the relationships between trace gases, aerosol and cloud structure, and radiative transfer in the atmosphere, and will improve the parameterization of global circulation models. The present GCMs do not model important feedbacks, including those from clouds, oceans, and land processes. The purpose of this workshop is to identify such potential feedbacks, to evaluate the uncertainties in the feedback processes (and, if possible, to parameterize the feedback processes so that they can be treated in a GCM), and to recommend research programs that will reduce the uncertainties in important feedback processes. Individual reports are processed separately for the data bases.

Manowitz, B.

1990-10-01T23:59:59.000Z

56

Macroeconomic effects of high oil prices on the Swiss economy: 2003â??2008  

Science Journals Connector (OSTI)

In this paper, we examine the macroeconomic impact of the high oil price era between 2003 and mid-2008 on the Swiss economy. Using a medium-scale disequilibrium macroeconometric model, we focus not only on the effects of oil prices on the real GDP growth but also on their effects on demand-side components, prices, labour market and capacity output. Our simulation results indicate that high oil prices still had a non-negligible negative impact on economic performance despite the observed above average real economic growth rates. We have also found that an accommodative monetary policy might help in smoothing the negative effects of oil price shocks.

Erdal Atukeren

2011-01-01T23:59:59.000Z

57

Educational hardware for feedback systems  

E-Print Network (OSTI)

This thesis explores a variety of educational feedback systems with an emphasis on developing them for in-class demonstrations and in-depth student projects. The nature of feedback systems means there is never a shortage ...

Dancy, Isaac

2004-01-01T23:59:59.000Z

58

Attribution Analysis of Cloud Feedback  

E-Print Network (OSTI)

Uncertainty on cloud feedback is the primary contributor to the large spread of equilibrium climate sensitivity (ECS) in climate models. In this study, we compare the short-term cloud feedback in climate models with observations, and evaluate...

Zhou, Chen

2014-07-15T23:59:59.000Z

59

Beam bunch feedback  

SciTech Connect

When the electromagnetic fields that are excited by the passage of a bundle of charged particles persist to act upon bunches that follow, then the motions of the bunches are coupled. This action between bunches circulating on a closed orbit can generate growing patterns of bunch excursions. Such growth can often be suppressed by feedback systems that detect the excursion and apply corrective forces to the bunches. To be addressed herein is feedback that acts on motions of the bunch body centers. In addition to being useful for suppressing the spontaneous growth of coupled-bunch motions, such feedback can be used to damp transients in bunches injected into an accelerator or storage ring; for hadrons which lack strong radiation damping, feedback is needed to avoid emittance growth through decoherence. Motions excited by noise in magnetic fields or accelerating rf can also be reduced by using this feedback. Whether the action is on motions that are transverse to the closed orbit or longitudinal, the arrangement is the same. Bunch position is detected by a pickup and that signal is processed and directed to a kicker that may act upon the same bunch or some other portion of the collective beam pattern. Transverse motion is an oscillation with angular frequency {nu}{perpendicular}{omega}{sub o} where {omega}{sub o} is the orbital frequency 2{pi}{line_integral}o. Longitudinal synchrotron oscillation occurs at frequency {omega} {sub s} = {nu}{sub s}{omega}{sub o}. The former is much more rapid, {nu}{perpendicular} being on the order of 10 while {nu}{sub s} is typically about 10{sup minus 1} to 10 {sup minus 2}.

Lambertson, G.

1995-09-01T23:59:59.000Z

60

Current vs. Voltage Feedback Amplifiers  

E-Print Network (OSTI)

?' In most applications, the differences between current feedback (CFB) and voltage feedback (VFB) are not apparent. Today's CFB and VFB amplifiers have comparable performance, but there are cer- tain unique Performance · Feedback Freedom Aside from the well-known attribute of CFB amplifiers, gain

Lanterman, Aaron

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Next Generation Environmentally Friendly Driving Feedback Systems...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Next Generation Environmentally Friendly Driving Feedback Systems Research and Development Next Generation Environmentally Friendly Driving Feedback Systems Research and...

62

The Universe Adventure - Feedback  

NLE Websites -- All DOE Office Websites (Extended Search)

Contact Us Contact Us First Name (optional): Simpson Last Name (optional): Homer E-Mail Address (if you would like to hear back from us): How can we contact you? Occupation (high school student, physics teacher, cosmologist, et cetera): What is your occupation? Type: Type of Feedback Organization/Format Content Fundamentals of Cosmology Evidence for the Big Bang Eras of the Cosmos The Final Frontier Glossary Other Comments and Feedback: We appreciate your comments! - The Universe Adventure Team submit reset [ top ] Site Content National Science Foundation Department of Energy S.D. Bechtel, Jr. Foundation [ Site Map ] optimized for Firefox [ UC Berkeley ] [ UC Berkeley Physics ] [ Particle Adventure! ] [ Contact Us ] Copyright © 2005 Lawrence Berkeley National Laboratory Physics Division |

63

Regenerative feedback resonant circuit  

DOE Patents (OSTI)

A regenerative feedback resonant circuit for measuring a transient response in a loop is disclosed. The circuit includes an amplifier for generating a signal in the loop. The circuit further includes a resonator having a resonant cavity and a material located within the cavity. The signal sent into the resonator produces a resonant frequency. A variation of the resonant frequency due to perturbations in electromagnetic properties of the material is measured.

Jones, A. Mark; Kelly, James F.; McCloy, John S.; McMakin, Douglas L.

2014-09-02T23:59:59.000Z

64

Polarization feedback laser stabilization  

DOE Patents (OSTI)

A system for locking two Nd:YAG laser oscillators includes an optical path for feeding the output of one laser into the other with different polarizations. Elliptical polarization is incorporated into the optical path so that the change in polarization that occurs when the frequencies coincide may be detected to provide a feedback signal to control one laser relative to the other. 4 figs.

Esherick, P.; Owyoung, A.

1987-09-28T23:59:59.000Z

65

AGN and the necessity of feedback  

Science Journals Connector (OSTI)

...reheat = 0.00 reheat = 0.41 -20 -25 MK - 5 log h (mag-1h3Mpc-3) 10-6 10-5...the necessity of feedback 699 -20 -25 MK - 5 log h (mag-1h3Mpc-3) 10-6 10-5...physical mechanism to inhibit the formation of ultra-massive galaxies at the centres of groups...

2005-01-01T23:59:59.000Z

66

Quantum effects improve the energy efficiency of feedback control  

E-Print Network (OSTI)

The laws of thermodynamics apply equally well to quantum systems as to classical systems, and because of this quantum effects do not change the fundamental thermodynamic efficiency of isothermal refrigerators or engines. We show that, despite this fact, quantum mechanics permits measurement-based feedback control protocols that are more thermodynamically efficient than their classical counterparts. As part of our analysis we perform a detailed accounting of the thermodynamics of unitary feedback control, and elucidate the sources of inefficiency in measurement-based and coherent feedback.

Jordan M. Horowitz; Kurt Jacobs

2014-04-15T23:59:59.000Z

67

Adaptations of renewable energy policies to unstable macroeconomic situations—Case study: Wind power in Brazil  

Science Journals Connector (OSTI)

Despite the massive cost reduction in the last decade, wind power generation is generally still more expensive than conventional energy sources which benefit from the exclusion of externality costs in the price structure. Support policies for renewable energies guarantee the economic viability of this type of electrical power generation in many European countries. In Latin America, Brazil has become the pioneer state for renewable energy with the implementation of the PROINFA programme that supports, among other sources, wind power development of 1100 MW. This article presents an overview of the differences between the German and Brazilian wind power promotion policies with a special focus on how PROINFA can be adapted to the unstable macroeconomic situation of Brazil. The document specifically examines the adaptation of wind power promotion policies to large inflation and interest rates in Brazil.

Johannes M. Kissel; Stefan C.W. Krauter

2006-01-01T23:59:59.000Z

68

Robust LT codes with alternating feedback  

Science Journals Connector (OSTI)

In this paper, we propose robust LT codes with alternating feedback (LT-AF codes), which lightly utilize the feedback channel and surpass the performance of existing LT codes with feedback. In LT-AF codes, we consider a loss prone feedback channel for ... Keywords: Erasure channel, Feedback channel, Forward error correction codes, LT codes, Rateless codes

Ali Talari, Nazanin Rahnavard

2014-08-01T23:59:59.000Z

69

The Dust Settles on Water Vapor Feedback  

Science Journals Connector (OSTI)

...To understand water vapor feedback...shifts in the atmospheric circulation...caused a positive water vapor feedback...temperature. Condensation, evaporation...shifts in the atmospheric circulation...caused a positive water vapor feedback...temperature. Condensation, evaporation...

Anthony D. Del Genio

2002-04-26T23:59:59.000Z

70

feedback | OpenEI Community  

Open Energy Info (EERE)

7 7 Varnish cache server Home Groups Community Central Green Button Applications Developer Utility Rate FRED: FRee Energy Database More Public Groups Private Groups Features Groups Blog posts Content Stream Documents Discussions Polls Q & A Events Notices My stuff Energy blogs 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142234617 Varnish cache server feedback Home Kyoung's picture Submitted by Kyoung(155) Contributor 13 December, 2012 - 10:01 Geothermal Stakeholder Feedback on the GRR feedback GRR As we head into the holiday season, we thought we'd share with you some of the feedback we've received from industry, agency, consultant and other stakeholder personnel. Thanks again to all, and Happy Holidays! General Syndicate content

71

A macroeconomic analysis of electricity consumption in Tunisia: energy policy implications  

Science Journals Connector (OSTI)

Electricity demand forecasting is becoming an essential instrument for energy management policy in a liberalised electricity market. To address the needs, an electricity consumption forecasting model based on macroeconomic factors for Tunisia during the period of 1971 to 2008 has been investigated. A cointegration and error correction model incorporated with causality analysis present an appropriate framework for studying the aggregate electricity demand. It is found that the there are long run relationships between electricity consumption, real income, population and the consumer price index. For causality results, it was found there are unidirectional relationships from electricity consumption to real income, from electricity consumption to consumer price index and from population to real income. The results from our study might be useful for the government in forming appropriate energy policies. Indeed, the policymaker would visibly pose problems for electricity security by increasing investment in the electricity supply sector in order to cope with the increasing demand and undertaking more research to sustain their social, economic and environmental needs by implementing an energy efficiency measures.

Néjib Chouaïbi; Tahar Abdessalem

2011-01-01T23:59:59.000Z

72

Thermodynamics of feedback controlled systems  

Science Journals Connector (OSTI)

We compute the entropy reduction in feedback controlled systems due to the repeated operation of the controller. This was the lacking ingredient to establish the thermodynamics of these systems, and in particular of Maxwell’s demons. We illustrate some of the consequences of our general results by deriving the maximum work that can be extracted from isothermal feedback controlled systems. As a case example, we finally study a simple system that performs an isothermal information-fueled particle pumping.

F. J. Cao and M. Feito

2009-04-10T23:59:59.000Z

73

Feedback Control of Microstate to Control Macrostate Properties  

E-Print Network (OSTI)

Feedback Control of Microstate to Control Macrostate Properties of Controllable Fluids by John R. Lloyd and Clark J. Radcliffe Department of Mechanical Engineering Michigan State University East Lansing, MI 48824-1226 ABSTRACT Controllable fluids are those fluids whose properties can be controlled

Radcliffe, Clark J.

74

The Digitization of Word-of-Mouth: Promise and Challenges of Online Feedback  

E-Print Network (OSTI)

Online feedback mechanisms harness the bi-directional communication capabilities of the Internet in order to engineer large-scale word-of-mouth networks. Best known so far as a technology for building ...

Dellarocas, Chrysanthos

2004-11-23T23:59:59.000Z

75

Hybrid Geometric Feedback Control of Three-Dimensional Bipedal Robotic Walkers with Knees and Feet  

E-Print Network (OSTI)

This thesis poses a feedback control method for obtaining humanlike bipedal walking on a human-inspired hybrid biped model. The end goal was to understand better the fundamental mechanisms that underlie bipedal walking in the hopes...

Sinnet, Ryan Wesley

2012-07-16T23:59:59.000Z

76

Wind-evaporation feedback, angular momentum conservation, and the abrupt onset of monsoons  

E-Print Network (OSTI)

This thesis examines the mechanisms responsible for the abrupt onset of monsoon circulations, focusing on the role played by wind-evaporation feedback and its interaction with angular momentum conserving flow. The first ...

Boos, William R. (William Ronald), 1975-

2008-01-01T23:59:59.000Z

77

Effects of Resource Distribution and Feedback on Computer-Mediated Collaboration in Dyads  

Science Journals Connector (OSTI)

Two methods for fostering collaborative behavior in dyads are compared: a feedback-mechanism to scaffold collaborative behavior, and the use of distributed learning resources. Based on recent research on what constitutes effective collaboration behavior, ...

Joerg Zumbach; Peter Reimann; Jochen Schönemann

2005-05-01T23:59:59.000Z

78

LFSC - Linac Feedback Simulation Code  

SciTech Connect

The computer program LFSC (Feedback Simulation Code>) is a numerical tool for simulation beam based feedback in high performance linacs. The code LFSC is based on the earlier version developed by a collective of authors at SLAC (L.Hendrickson, R. McEwen, T. Himel, H. Shoaee, S. Shah, P. Emma, P. Schultz) during 1990-2005. That code was successively used in simulation of SLC, TESLA, CLIC and NLC projects. It can simulate as pulse-to-pulse feedback on timescale corresponding to 5-100 Hz, as slower feedbacks, operating in the 0.1-1 Hz range in the Main Linac and Beam Delivery System. The code LFSC is running under Matlab for MS Windows operating system. It contains about 30,000 lines of source code in more than 260 subroutines. The code uses the LIAR ('Linear Accelerator Research code') for particle tracking under ground motion and technical noise perturbations. It uses the Guinea Pig code to simulate the luminosity performance. A set of input files includes the lattice description (XSIF format), and plane text files with numerical parameters, wake fields, ground motion data etc. The Matlab environment provides a flexible system for graphical output.

Ivanov, Valentin; /Fermilab

2008-05-01T23:59:59.000Z

79

Kollisionsdetektion fr Force-Feedback-  

E-Print Network (OSTI)

(high impact velocities or large contact areas) 3. Force-feedback requires a constant update rate.e., in case of no overlap - Complicated to compute penetration depth [Mendoza et al, 2006], [Zhang et al, 2007], ... § Voxels & Points (VPS): + Easy to compute approx. penetration depth - Large memory footprint - Aliasing

Zachmann, Gabriel

80

UWM CIO Office Feedback on  

E-Print Network (OSTI)

Accounts Receivable General Accounting Svcs. Cashier's Office Purchasing Office Travel Office Total Receivable 0 0 2 7 3 4 General Accounting Svcs. 0 1 2 8 5 0 Cashiers Office 0 0 3 3 2 8 Purchasing Office 2 6UWM CIO Office Feedback on The Department of Business & Financial Services Presentation of Results

Saldin, Dilano

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

The Greenhouse Effect without Feedbacks  

E-Print Network (OSTI)

The Greenhouse Effect without Feedbacks #12;Three Pillars Behind Climate Change! #12;1. Global. Greenhouse Gases have been on the increase. #12;3. The Greenhouse effect is a powerful theory that explains! natural greenhouse effect! · an empirical introduction #12;Moral of the story: The doubling of CO2 causes

82

External optical feedback in semiconductor lasers  

E-Print Network (OSTI)

experiment, best wavelength stabilization also occurred at low bias & high feedback conditions. Table I summarizes and compares the two optical feedback experiments. A picture of the experiment setup is shown in Fig. 29. 46 TABLE I COMPARISON OF MIRROR... experiment, best wavelength stabilization also occurred at low bias & high feedback conditions. Table I summarizes and compares the two optical feedback experiments. A picture of the experiment setup is shown in Fig. 29. 46 TABLE I COMPARISON OF MIRROR...

Mebrahtu, Philemon

2012-06-07T23:59:59.000Z

83

Adding haptic feedback to mobile tv  

Science Journals Connector (OSTI)

With the abundance of large-screen displays, mobile device users currently have little motivation to stream video content and TV broadcasts to their device - the desire to watch content 'on the move' does not currently outweigh the necessity of viewing ... Keywords: back-of-device feedback, haptic feedback, mobile tv, ultrasonic feedback

Jason Alexander; Mark T. Marshall; Sriram Subramanian

2011-05-01T23:59:59.000Z

84

European Economic Review 18 11982)243-248. Norfh-Holle,nd Publishing Company THE OIL SHOCKS AND MACROECONOMIC ADJUSTMEN'F IN  

E-Print Network (OSTI)

the oil price increases a~d pre-ta~: profitability remained strong throughout the 1970s. Demand factorsEuropean Economic Review 18 11982)243-248. Norfh-Holle,nd Publishing Company THE OIL SHOCKS importance of supply versus demand factors in r,x:ent U.S. macroeconomic history remains in strong dispute

85

Feedback control of resistive instabilities  

SciTech Connect

Resistive instabilities are responsible for much of the global behavior and the determination of the possible domains of operation of tokamaks. Their successful control could have definite advantages, even making available new regimes of operation. Elimination of sawtoothing might allow operation with higher currents and more peaked current profiles, with q on axis well below unity. In this work different feedback schemes are explored. Simple analytical derivations of the effects of local heating and current drive feedback are presented. Although control of modes with m greater than or equal to 2 is fairly straightforward, the control of the m = 1 mode is more difficult because of its proximity to ideal instability. The most promising scheme utilizes high energy trapped particles. 20 refs., 3 figs.

White, R.B.; Rutherford, P.H.; Furth, H.P.; Park, W.; Chen, L.

1985-12-01T23:59:59.000Z

86

Rf Feedback free electron laser  

DOE Patents (OSTI)

A free electron laser system and electron beam system for a free electron laser which use rf feedback to enhance efficiency. Rf energy is extracted from an electron beam by decelerating cavities and returned to accelerating cavities using rf returns such as rf waveguides, rf feedthroughs, etc. This rf energy is added to rf klystron energy to lower the required input energy and thereby enhance energy efficiency of the system.

Brau, Charles A. (Los Alamos, NM); Swenson, Donald A. (Los Alamos, NM); Boyd, Jr., Thomas J. (Los Alamos, NM)

1981-01-01T23:59:59.000Z

87

Feedback Enhanced Sensitivity in Optomechanics: Surpassing the Parametric Instability Barrier  

E-Print Network (OSTI)

The intracavity power, and hence sensitivity, of optomechanical sensors is commonly limited by parametric instability. Here we characterize the parametric instability induced sensitivity degradation in a micron scale cavity optomechanical system. Feedback via optomechanical transduction and electrical gradient force actuation is applied to suppress the parametric instability. As a result a 5.4 fold increase in mechanical motion transduction sensitivity is achieved to a final value of $1.9\\times 10^{-18}\\rm m Hz^{-1/2}$.

Glen I. Harris; Ulrik L. Andersen; Joachim Knittel; Warwick P. Bowen

2011-09-12T23:59:59.000Z

88

Domestic Audiences, Policy Feedback, and Sequential Decisions During Military Interventions  

E-Print Network (OSTI)

Interventions. (December 2009) Douglas Walter Kuberski, B.A., University of Nebraska, M.A., University of Akron Chair of Advisory Committee: Dr. Nehemia Geva The literature on escalation situations and audience costs suggests that democratic executives... approach and present a model of sequential decision-making that explains the conditions under which leaders escalate and de-escalate commitment in response to feedback. I attempt to break down the audience cost mechanism to explain why democratic...

Kuberski, Douglas Walter

2011-02-22T23:59:59.000Z

89

On-line optical flow feedback for mobile robot localization/navigation  

E-Print Network (OSTI)

ON-LINE OPTICAL FLOW FEEDBACK FOR MOBILE ROBOT LOCALIZATION/NAVIGATION A Thesis by DAVID KRISTIN SORENSEN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 2003 Major Subject: Mechanical Engineering ON-LINE OPTICAL FLOW FEEDBACK FOR MOBILE ROBOT LOCALIZATION/NAVIGATION A Thesis by DAVID KRISTIN SORENSEN Submitted to Texas A&M University in partial fulfillment...

Sorensen, David Kristin

2004-09-30T23:59:59.000Z

90

FEEDBACK:  

Science Journals Connector (OSTI)

......internally and a 100Mb pipe to the internet via JANET. We have a college- wide wireless capability and internet access from all 1400 student...stop instant messaging due to abuse and bullying; stop Facebook...install software to allow the internet access in classrooms to be......

Feedback

2010-01-01T23:59:59.000Z

91

FEEDBACK:  

Science Journals Connector (OSTI)

......through its publications the political stand to utilise outsourcing...technical arenas and increased investment in the consultancies markets...being more expensive, high risk and a less adaptable work...can not achieve the major investment benefits it is using to gain......

Feedback

2009-11-01T23:59:59.000Z

92

Audio feedback design: principles and emerging practice  

Science Journals Connector (OSTI)

This paper considers the design of audio feedback as experienced in several faculties of a UK university and as identified in the literature. Several adaptable models are presented, including: 'personal tutor monologue' recorded at the PC by the tutor as part of the marking process; 'personal feedback conversations', recorded by the tutor or student(s) in the lab or studio to capture project discussions or studio 'crits'; 'broadcast feedback' targeted at large groups; 'peer audio feedback', in which students learn as they assess each other's work; 'tutor conversations', a 'common room conversation' approach designed to model critical thinking; and 'personal audio interventions', targeted at individuals to address emerging issues. The methods are introduced and evaluated according to their potential to formatively affect learning. Audio feedback design factors are outlined and practical recommendations are offered. The paper concludes that the use of audio feedback can promote a culture of dialogic engagement.

Andrew Middleton; Anne Nortcliffe

2010-01-01T23:59:59.000Z

93

Combining Feedback Absorption Spectroscopy, Amplified Resonance...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

On-Board Measurement of Ammonia and Nitrous Oxide Using Feedback Absorption Laser Spectroscopy Combined with Amplified Resonance and Low Pressure Sampling Cummins...

94

Detecting vegetation-precipitation feedbacks in mid-Holocene North Africa from two climate models  

SciTech Connect

Using two climate-vegetation model simulations from the Fast Ocean Atmosphere Model (FOAM) and the Community Climate System Model (CCSM, version 2), we investigate vegetation-precipitation feedbacks across North Africa during the mid-Holocene. From mid-Holocene snapshot runs of FOAM and CCSM2, we detect a negative feedback at the annual timescale with our statistical analysis. Using the Monte- Carlo bootstrap method, the annual negative feedback is further confirmed to be significant in both simulations. Additional analysis shows that this negative interaction is partially caused by the competition between evaporation and transpiration in North African grasslands. Furthermore, we find the feedbacks decrease with increasing timescales, and change signs from positive to negative at increasing timescales in FOAM. The proposed mechanism for this sign switch is associated with the different persistent timescales of upper and lower soil water contents, and their interactions with vegetation and atmospheric precipitation.

Wang, Yi; Notaro, Michael; Liu, Zhengyu; Gallimore, Robert; Levis, Samuel; Kutzbach, John E.

2008-03-31T23:59:59.000Z

95

Optical feedback structures and methods of making  

DOE Patents (OSTI)

An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in optical communication with the optical feedback structure. The chromophore can be a semiconductor nanocrystal. The resonator can provide laser emission when excited.

Snee, Preston T; Chan, Yin Thai; Nocera, Daniel G; Bawendi, Moungi G

2014-11-18T23:59:59.000Z

96

Time-delayed feedback control of unstable periodic orbits near a subcritical Hopf bifurcation  

E-Print Network (OSTI)

We show that Pyragas delayed feedback control can stabilize an unstable periodic orbit (UPO) that arises from a generic subcritical Hopf bifurcation of a stable equilibrium in an n-dimensional dynamical system. This extends results of Fiedler et al. [PRL 98, 114101 (2007)], who demonstrated that such feedback control can stabilize the UPO associated with a two-dimensional subcritical Hopf normal form. Pyragas feedback requires an appropriate choice of a feedback gain matrix for stabilization, as well as knowledge of the period of the targeted UPO. We apply feedback in the directions tangent to the two-dimensional center manifold. We parameterize the feedback gain by a modulus and a phase angle, and give explicit formulae for choosing these two parameters given the period of the UPO in a neighborhood of the bifurcation point. We show, first heuristically, and then rigorously by a center manifold reduction for delay differential equations, that the stabilization mechanism involves a highly degenerate Hopf bifurcation problem that is induced by the time-delayed feedback. When the feedback gain modulus reaches a threshold for stabilization, both of the genericity assumptions associated with a two-dimensional Hopf bifurcation are violated: the eigenvalues of the linearized problem do not cross the imaginary axis as the bifurcation parameter is varied, and the real part of the cubic coefficient of the normal form vanishes. Our analysis of this degenerate bifurcation problem reveals two qualitatively distinct cases when unfolded in a two-parameter plane. In each case, Pyragas-type feedback successfully stabilizes the branch of small-amplitude UPOs in a neighborhood of the original bifurcation point, provided that the phase angle satisfies a certain restriction.

Genevieve Brown; Claire M. Postlethwaite; Mary Silber

2010-06-17T23:59:59.000Z

97

Energy Department Seeks Feedback on Draft Guidance for the Hydroelectr...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Feedback on Draft Guidance for the Hydroelectric Production Incentive Program Energy Department Seeks Feedback on Draft Guidance for the Hydroelectric Production Incentive Program...

98

Energy Department Seeks Additional Feedback on Draft Guidance...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Additional Feedback on Draft Guidance for the Hydroelectric Production Incentive Program Energy Department Seeks Additional Feedback on Draft Guidance for the Hydroelectric...

99

Carbon Credit Capital and Feedback Ventures JV | Open Energy...  

Open Energy Info (EERE)

and Feedback Ventures JV Jump to: navigation, search Name: Carbon Credit Capital and Feedback Ventures JV Place: India Sector: Carbon Product: String representation "Carbon Credit...

100

DOE Solicits Feedback on Subsurface Characterization to Commercialize...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

full RFI and download the official feedback form, go to EERE Exchange here. To better engineer commercially viable EGS technologies, the Energy Department is soliciting feedback on...

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

The first galaxies: simulating their feedback-regulated assembly  

E-Print Network (OSTI)

We investigate the formation of a galaxy reaching a virial mass of ~10^8 at z~10 by carrying out a zoomed radiation-hydrodynamical cosmological simulation. This simulation traces Population~III (Pop~III) star formation, characterized by a modestly top-heavy initial mass function (IMF), and considers stellar feedback such as photoionization heating from Pop~III and Population~II (Pop~II) stars, mechanical and chemical feedback from supernovae (SNe), and X-ray feedback from accreting black holes (BHs) and high-mass X-ray binaries (HMXBs). We self-consistently impose a transition in star formation mode from top-heavy Pop~III to low-mass Pop~II at the critical metallicity Zcrit=10^{-3.5} solar metallicity. We find that the star formation rate in the computational box is dominated by Pop~III until z~13, and by Pop~II thereafter. The intergalactic medium (IGM) is metal-enriched to an average of Zavg=10^{-4} solar metallicity at z~10, mainly by pair-instability SNe (PISNe), while 70% of the produced Pop~III stars di...

Jeon, Myoungwon; Pawlik, Andreas H; Milosavljevic, Milos

2015-01-01T23:59:59.000Z

102

An integrated optical sensor for GMAW feedback control  

SciTech Connect

The integrated optical sensor (IOS) is a multifunction feedback control sensor for arc welding, that is computer automated and independent of significant operator interaction. It is based on three major off-the-shelf'' components: a charged coupled device (CCD) camera, a diode laser, and a processing computer. The sensor head is compact and lightweight to avoid interference with weld head mobility, hardened to survive the harsh operating environment, and free of specialized cooling and power requirements. The sensor is positioned behind the GMAW torch and measures weld pool position and width, standoff distance, and postweld centerline cooling rate. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint, thus allowing compensation for such phenomena as arc blow. Sensor stand off distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to infer the final metallurgical state of the weld bead and heat affected zone, thereby providing a means of controlling post weld mechanical properties.

Taylor, P.L.; Watkins, A.D.; Larsen, E.D.; Smartt, H.B.

1992-01-01T23:59:59.000Z

103

An integrated optical sensor for GMAW feedback control  

SciTech Connect

The integrated optical sensor (IOS) is a multifunction feedback control sensor for arc welding, that is computer automated and independent of significant operator interaction. It is based on three major ``off-the-shelf`` components: a charged coupled device (CCD) camera, a diode laser, and a processing computer. The sensor head is compact and lightweight to avoid interference with weld head mobility, hardened to survive the harsh operating environment, and free of specialized cooling and power requirements. The sensor is positioned behind the GMAW torch and measures weld pool position and width, standoff distance, and postweld centerline cooling rate. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint, thus allowing compensation for such phenomena as arc blow. Sensor stand off distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to infer the final metallurgical state of the weld bead and heat affected zone, thereby providing a means of controlling post weld mechanical properties.

Taylor, P.L.; Watkins, A.D.; Larsen, E.D.; Smartt, H.B.

1992-08-01T23:59:59.000Z

104

Mechanical AGN feedback: controlling the thermodynamical evolution of elliptical galaxies  

Science Journals Connector (OSTI)

......to the galactic core often overheat the central ISM, an effect...always maintains an acceptable thermal structure (Kim Fabbiano 2003...are able to regulate the thermal evolution of the ISM, suppressing...being linearly stable against thermal instability (e.g. Balbus......

M. Gaspari; F. Brighenti; P. Temi

2012-07-21T23:59:59.000Z

105

Analyzing Fuel Saving Opportunities through Driver Feedback Mechanisms  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

* Total (all DOE): 400k Barriers Addressed * Portfolio approach necessary to achieve GHG reduction goals - Long turnover time for legacy fleet - Assessing fuel savings...

106

Rate Us - ORNL DAAC Feedback Forum  

NLE Websites -- All DOE Office Websites (Extended Search)

Help > Feedback Help > Feedback Rate Us - ORNL DAAC Feedback Forum To improve service to our customers, this forum provides a means to monitor user satisfaction. Please take a moment to tell us about your experience. Consider Data availability, accessibility, and value Web navigation and content Customer service Your responses will remain anonymous in keeping with our Privacy Policy. Select one of the following options that best describes your experience with the ORNL DAAC. Positive Mixed Negative If you wish to add comments or to explain your rating, please enter your comments in the box below. If you would like us to reply to your comments or concern, please enter your e-mail address here: Please solve the following simple math problem: 4 x 2 = help icon Submit Feedback Clear form

107

MIXING PROPERTIES OF TRIANGULAR FEEDBACK SHIFT BERND SCHOMBURG  

E-Print Network (OSTI)

generators and to stream ciphers in CFB mode. Key words. Feedback shift registers, Markov chains, stochastic

108

Mechanical Engineering Faculty Candidate Seminar: Mechanical Loading Decreases Osteolysis and Tumor  

E-Print Network (OSTI)

Mechanical Engineering Faculty Candidate Seminar: Mechanical Loading Decreases Osteolysis and Tumor.D. Cornell University Mechanical Engineering Abstract: Approximately 1 in 4 patients with advanced breast to meet structural and metabolic needs via a feedback loop that is regulated by the prevailing mechanical

Wisconsin at Madison, University of

109

Black hole foraging: feedback drives feeding  

E-Print Network (OSTI)

We suggest a new picture of supermassive black hole (SMBH) growth in galaxy centers. Momentum-driven feedback from an accreting hole gives significant orbital energy but little angular momentum to the surrounding gas. Once central accretion drops, the feedback weakens and swept-up gas falls back towards the SMBH on near-parabolic orbits. These intersect near the black hole with partially opposed specific angular momenta, causing further infall and ultimately the formation of a small-scale accretion disk. The feeding rates into the disk typically exceed Eddington by factors of a few, growing the hole on the Salpeter timescale and stimulating further feedback. Natural consequences of this picture include (i) the formation and maintenance of a roughly toroidal distribution of obscuring matter near the hole; (ii) random orientations of successive accretion disk episodes; (iii) the possibility of rapid SMBH growth; (iv) tidal disruption of stars and close binaries formed from infalling gas, resulting in visible fl...

Dehnen, Walter

2013-01-01T23:59:59.000Z

110

Subscribe | About Us | Feedback Business Media  

E-Print Network (OSTI)

Search Subscribe | About Us | Feedback Advantage Business Media Part Search Search Powered by Terms Directory Related Links White Papers Job Search Digital Library Wall Charts Newsletter Subscription Events the project. (Editing by Maggie Fox and Paul Simao) Most Popular on ECNmag.com: Company Introduces World

Rogers, John A.

111

VIBROTACTILE FEEDBACK FOR AN UNDERWATER TELEROBOT  

E-Print Network (OSTI)

for offshore oil production and deep-sea exploration. While much of the equipment used on the sea floor has is often less than optimal in the offshore setting. Although force feedback has been proven to enhance conditions of the offshore environment, system reliability is at a premium and has precluded

Dennerlein, Jack

112

Enhancing feedback process scheduling via a predictive control approach  

E-Print Network (OSTI)

Enhancing feedback process scheduling via a predictive control approach Alessandro Vittorio the application possibilities at an affordable additional cost. Keywords: feedback scheduling; control that preemptive process schedulers in multitasking operating systems can be viewed, and above all designed

Como, Giacomo

113

Slow Orbit Feedback at the ALS Using Matlab  

E-Print Network (OSTI)

Ring Setup and Control Using Matlab®," LSAP Note #248, JuneFeedback at the ALS Using Matlab G_ Port mann Advanced LightFEEDBACK AT THE ALS USING MATLAB* G. Portmann Advanced Light

Portmann, G.

2011-01-01T23:59:59.000Z

114

Feedback | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Feedback Feedback Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 Print Text Size: A A A...

115

Learning to Rank from Relevance Feedback for e-Discovery  

Science Journals Connector (OSTI)

In recall-oriented search tasks retrieval systems are privy to a greater amount of user feedback. In this paper we present a novel method of combining relevance feedback with learning to rank. Our experiments ...

Peter Lubell-Doughtie; Katja Hofmann

2012-01-01T23:59:59.000Z

116

Feedback control of flow separation using synthetic jets  

E-Print Network (OSTI)

The primary goal of this research is to assess the effect of synthetic jets on flow separation and provide a feedback control strategy for flow separation using synthetic jets. The feedback control synthesis is conducted based upon CFD simulation...

Kim, Kihwan

2006-04-12T23:59:59.000Z

117

Feedback Control RealTime Scheduling: Framework, Modeling, and Algorithms *  

E-Print Network (OSTI)

1 Feedback Control Real­Time Scheduling: Framework, Modeling, and Algorithms * Chenyang Lu John A}@virginia.edu Abstract This paper presents a feedback control real­time scheduling (FCS) framework for adaptive real. In particular, we establish a dynamic model and performance analysis of several feedback control scheduling

Son, Sang H.

118

Feedback Control Real-Time Scheduling: Framework, Modeling, and Algorithms*  

E-Print Network (OSTI)

1 Feedback Control Real-Time Scheduling: Framework, Modeling, and Algorithms* Chenyang Lu John A}@virginia.edu Abstract This paper presents a feedback control real-time scheduling (FCS) framework for adaptive real. In particular, we establish a dynamic model and performance analysis of several feedback control scheduling

Son, Sang H.

119

Non-dissipative boundary feedback for Rayleigh and Timoshenko beams  

E-Print Network (OSTI)

Non-dissipative boundary feedback for Rayleigh and Timoshenko beams Chris Guiver and Mark R. Opmeer-dissipative feedback that has been shown in the literature to exponentially stabilize an Euler-Bernoulli beam makes a Rayleigh beam and a Timoshenko beam unstable. 1 Introduction Feedback control of beams is a much studied

Opmeer, Mark

120

You must be creative! The effect of performance feedback on intrinsic motivation and creativity  

E-Print Network (OSTI)

the effect of perceived competence on interest. Creative answers to open-ended problems were assessed after time 2 (before feedback), and after time 3 (after feedback). Feedback style (autonomous, controlled, and neutral) and Feedback sign (positive, negative...

Benzer, Justin Kane

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Three essays in macroeconomics  

E-Print Network (OSTI)

This thesis is a collection of three essays on international trade and economic growth. Chapter 1 analyzes the dynamic gains from trade in a Hecksher-Ohlin economy with endogenous factor accumulation. In a framework where ...

Auer, Raphael Anton Maximilian Peter Gabriel

2006-01-01T23:59:59.000Z

122

Essays in Macroeconomic Analysis  

E-Print Network (OSTI)

-2- -3- A mis padres, por todo. -4- TABLE OF CONTENTS ABSTRACTS... with their theoretical predictions) but an increase in the consumption of durables which is consistent with the evidence and theoretical predictions of the New Keynesian models. CHAPTER 2: THE IMPACT OF FISCAL EXPANSIONS ON PRIVATE SPENDING: A REAL...

Valcarcel, Victor J.

2008-07-31T23:59:59.000Z

123

Essays in macroeconomics  

E-Print Network (OSTI)

Revenues and Non-Capital Expenditures . . . . . . . . . 3.6Total revenue vs. non-capital expenditure: This includes alland excludes capital expenditures. Capital expenditures

Daula, Thomas Anthony; Daula, Thomas Anthony

2012-01-01T23:59:59.000Z

124

Three Essays in Macroeconomics  

E-Print Network (OSTI)

Journal of Monetary Economics, 41(2):257–275. [Kakwani,1977] Kakwani, N. C. (1977). Applications of lorenz curvesSuits, 1977] and [Kakwani, 1977] also use income levels to

Fu, Zhiming

2014-01-01T23:59:59.000Z

125

Residential Feedback Devices and Programs: Opportunities for Natural Gas  

SciTech Connect

Behavior-based approaches have been a growing interest in the energy efficiency field over recent years and the use of residential energy feedback has garnered particular interest. By providing an increased level of detail, feedback can greatly increase a consumer's understanding of how energy is used in their home. This project reviewed the existing body of research on electricity feedback to identify parallel lessons for gas, discussed the benefits and challenges of different types of feedback, and identifying three feedback options that show strong potential for natural gas savings.

Kerr, R.; Tondro, M.

2012-12-01T23:59:59.000Z

126

Systematic errors in the measurement of neutrino masses due to baryonic feedback processes: Prospects for stage IV lensing surveys  

E-Print Network (OSTI)

We examine the importance of baryonic feedback effects on the matter power spectrum on small scales, and the implications for the precise measurement of neutrino masses through gravitational weak lensing. Planned large galaxy surveys such as the Large Synoptic Sky Telescope (LSST) and Euclid are expected to measure the sum of neutrino masses to extremely high precision, sufficient to detect non-zero neutrino masses even in the minimal mass normal hierarchy. We show that weak lensing of galaxies while being a very good probe of neutrino masses, is extremely sensitive to baryonic feedback processes. We use publicly available results from the Overwhelmingly Large Simulations (OWLS) project to investigate the effects of active galactic nuclei feedback, the nature of the stellar initial mass function, and gas cooling rates, on the measured weak lensing shear power spectrum. Using the Fisher matrix formalism and priors from CMB+BAO data, we show that when one does not account for feedback, the measured neutrino mass may be substantially larger or smaller than the true mass, depending on the dominant feedback mechanism, with the mass error |\\Delta m_nu| often exceeding the mass m_nu itself. We also consider gravitational lensing of the cosmic microwave background (CMB) and show that it is not sensitive to baryonic feedback on scales l power spectrum can be measured to similar accuracy.

Aravind Natarajan; Andrew R. Zentner; Nicholas Battaglia; Hy Trac

2014-09-04T23:59:59.000Z

127

Post-IPO capital expenditures and market feedback  

Science Journals Connector (OSTI)

This paper presents an empirical test of the ‘market feedback hypothesis’, a theory suggesting that information aggregated in the IPO process is used for the firm’s investment decision. We examine the relation between post-IPO unexpected capital expenditures and feedback generated during the IPO process for 1543 \\{IPOs\\} between 1987 and 1995. Feedback is measured by (i) the unexpected price adjustment made at the end of the waiting period and (ii) the unexpected initial return. Consistent with the hypothesis, we find that positive feedback is followed by positive abnormal capital expenditures. A long-term event study finds no significant difference in stock returns between positive and negative feedback IPOs. This suggests that firms should not ignore market feedback as there is no evidence for a feedback related bias in post-IPO stock prices.

Jos van Bommel; Theo Vermaelen

2003-01-01T23:59:59.000Z

128

Clock mechanisms and their effects, leads into steam engine  

E-Print Network (OSTI)

In a clock-maker’s shop, Simon Schaffer explains the great precision needed to make clocks, and the development of standardized parts. The feed-back mechanisms or governors are absolutely essential in the first stationary steam engines....

Dugan, David

2004-08-17T23:59:59.000Z

129

Physical process Mechanical mechanisms  

E-Print Network (OSTI)

1 Physical process Generation · Mechanical mechanisms F = m·a · Electric/Magnetic mechanisms F ­ Quadrupoles......shear stress fluctuations ­ High order poles...... phys. interpretation difficult Governing

Berlin,Technische Universität

130

Cloud feedback studies with a physics grid  

SciTech Connect

During this project the investigators implemented a fully parallel version of dual-grid approach in main frame code ICON, implemented a fully conservative first-order interpolation scheme for horizontal remapping, integrated UCLA-LES micro-scale model into ICON to run parallely in selected columns, and did cloud feedback studies on aqua-planet setup to evaluate the classical parameterization on a small domain. The micro-scale model may be run in parallel with the classical parameterization, or it may be run on a "physics grid" independent of the dynamics grid.

Dipankar, Anurag [Max Planck Institute for Meteorology Hamburg; Stevens, Bjorn [Max Planck Institute for Meteorology Hamburg

2013-02-07T23:59:59.000Z

131

II MODEL AND FEEDBACK LINEARIZING CONTROLLER 1 A Multilayer Perceptron Replaces a Feedback  

E-Print Network (OSTI)

in a permanent magnetic field DC Programa de P'os Gradua¸c~ao em Engenharia El'etrica, Pontif'icia Universidade magnetic field DC motor connected to a load via a gear train. The nonlinear load is a shaft with a mass and Feedback Linearizing Controller The servomechanism studied in this research consists of a permanent

Amaral, José Nelson

132

Beam-based Feedback for the Linac Coherent Light Source  

SciTech Connect

Beam-based feedback control loops are required by the Linac Coherent Light Source (LCLS) program in order to provide fast, single-pulse stabilization of beam parameters. Eight transverse feedback loops, a 6 x 6 longitudinal feedback loop, and a loop to maintain the electron bunch charge were successfully prototyped in MATLAB for the LCLS, and have been maintaining stability of the LCLS electron beam at beam rates up to 30Hz. In the final commissioning phase of LCLS the beam will be operating at up to 120Hz. In order to run the feedback loops at beam rate, the feedback loops will be implemented in EPICS IOCs with a dedicated ethernet multi-cast network. This paper will discuss the design of the beam-based Fast Feedback System for LCLS. Topics include MATLAB feedback prototyping, algorithm for 120Hz feedback, network design for fast data transport, actuator and sensor design for single-pulse control and sensor readback, and feedback configuration and runtime control.

Fairley, D.; Allison, S.; Chevtsov, S.; Chu, P.; Decker, F.J.; Emma, P.; Frisch, J.; Himel, T.; Kim, K.; Krejcik, P.; Loos, H.; Lahey, T.; Natampalli, P.; Peng, S.; Rogind, D.; Shoaee, H.; Straumann, T.; Williams, E.; White, G.; Wu, J.; Zelazney, M.; /SLAC

2010-02-11T23:59:59.000Z

133

Multiplex Chaos Synchronization in Semiconductor Lasers with Multiple Optoelectronic Feedbacks  

E-Print Network (OSTI)

Secure chaos based multiplex communication system scheme is proposed utilizing globally coupled semiconductor lasers with multiple variable time delay optoelectronic feedbacks.

E. M. Shahverdiev; K. A. Shore

2011-11-06T23:59:59.000Z

134

Inferring Cloud Feedbacks from ARM Continuous Forcing, ISCCP...  

NLE Websites -- All DOE Office Websites (Extended Search)

Inferring Cloud Feedbacks from ARM Continuous Forcing, ISCCP, and ARSCL Data A. D. Del Genio National Aeronautics and Space Administration Goddard Institute for Space Studies New...

135

Keys to Successful Feedback - John Settle PowerPoint Presentation...  

Office of Environmental Management (EM)

Transportation of Radioactive Materials Keys to Successful Feedback - John Settle PowerPoint Presentation Leadership Development Readings May 14, 2014 - "Your Brain on Conflict"...

136

Coherence length tunable semiconductor laser with optical feedback  

Science Journals Connector (OSTI)

We report the experimental results to continuously tune the coherence length of a semiconductor laser using an optical feedback scheme. The coherence length can be controlled by...

Wang, Yuncai; Kong, Lingqin; Wang, Anbang; Fan, Linlin

2009-01-01T23:59:59.000Z

137

Laser photon statistics in the feedback loop  

E-Print Network (OSTI)

A mere correspondence between the electron statistics and the photon one vanishes in the feedback loop (FBL). It means that the direct photodetection, supplying us with the electron statistics, does not provide us with a wished information about the laser photon statistics. For getting this information we should think up another measurement procedure, and we in the article suggest applying the three-level laser as a auxiliary measuring device. This laser has impressive property, namely, its photon statistics survive information about the initial photon statistics of the laser which excites coherently the three-level medium. Thus, if we choose the laser in the FBL as exciting the three-level laser, then we have an possibility to evaluate its initial photon statistics by means of direct detecting the three-level laser emission. Finally, this approach allows us to conclude the feedback is not capable of creating a regularity in the laser light beam. Contrary, the final photon fluctuations turn out to be always even bigger. The mentioned above feature of the three-level laser takes place only for the strong interaction between the lasers (exciting and excited). It means the initial state of the exciting laser is changed dramatically, so our measurement procedure can not be identified with some non-demolition one.

T. Yu. Golubeva; Yu. M. Golubev

2005-04-23T23:59:59.000Z

138

Resolving the Spin Crisis: Mergers and Feedback  

E-Print Network (OSTI)

We model in simple terms the angular momentum (J) problem of galaxy formation in CDM, and identify the key elements of a scenario that can solve it. The buildup of J is modeled via dynamical friction and tidal stripping in mergers. This reveals how over-cooling in incoming halos leads to transfer of J from baryons to dark matter (DM), in conflict with observations. By incorporating a simple recipe of supernova feedback, we match the observed J distribution in disks. Gas removal from small incoming halos, which make the low-J component of the product, eliminates the low-J baryons. Partial heating and puffing-up of the gas in larger incoming halos, combined with tidal stripping, reduces the J loss of baryons. This implies a higher baryonic spin for lower mass halos. The observed low baryonic fraction in dwarf galaxies is used to calibrate the characteristic velocity associated with supernova feedback, yielding v_fb sim 100 km/s, within the range of theoretical expectations. The model then reproduces the observed distribution of spin parameter among dwarf and bright galaxies, as well as the J distribution inside these galaxies. This suggests that the model captures the main features of a full scenario for resolving the spin crisis.

Avishai Dekel; Ariyeh H. Maller

2002-01-19T23:59:59.000Z

139

Feedback between Accelerator Physicists and magnet builders  

SciTech Connect

Our task is not to record history but to change it. (K. Marx (paraphrased)) How should Accelerator Physicists set magnet error specifications? In a crude social model, they place tolerance limits on undesirable nonlinearities and errors (higher order harmonics, component alignments, etc.). The Magnet Division then goes away for a suitably lengthy period of time, and comes back with a working magnet prototype that is reproduced in industry. A better solution is to set no specifications. Accelerator Physicists begin by evaluating expected values of harmonics, generated by the Magnet Division, before and during prototype construction. Damaging harmonics are traded off against innocuous harmonics as the prototype design evolves, lagging one generation behind the evolution of expected harmonics. Finally, the real harmonics are quickly evaluated during early industrial production, allowing a final round of performance trade-offs, using contingency scenarios prepared earlier. This solution assumes a close relationship and rapid feedback between the Accelerator Physicists and the magnet builders. What follows is one perspective of the way that rapid feedback was used to `change history` (improve linear and dynamic aperture) at RHIC, to great benefit.

Peggs, S.

1995-12-31T23:59:59.000Z

140

Some Notes on Wideband Feedback Amplifiers  

DOE R&D Accomplishments (OSTI)

The extension of the passband of wideband amplifiers is a highly important problem to the designer of electronic circuits. Throughout the electronics industry and in many research programs in physics and allied fields where extensive use is made of video amplifiers, the foremost requirement is a passband of maximum width. This is necessary if it is desired to achieve a more faithful reproduction of transient wave forms, a better time resolution in physical measurements, or perhaps just a wider band gain-frequency response to sine wave signals. The art of electronics is continually faced with this omnipresent amplifier problem. In particular, the instrumentation techniques of nuclear physics require amplifiers with short rise times, a high degree of gain stability, and a linear response to high signal levels. While the distributed amplifier may solve the problems of those seeking only a wide passband, the requirements of stability and linearity necessitate using feedback circuits. This paper considers feedback amplifiers from the standpoint of high-frequency performance. The circuit conditions for optimum steady-state (sinusoidal) and transient response are derived and practical circuits (both interstage and output) are presented which fulfill these conditions. In general, the results obtained may be applied to the low-frequency end.

Fitch, V.

1949-03-16T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Galaxy Formation with Self-Consistently Modeled Stars and Massive Black Holes. I: Feedback-Regulated Star Formation and Black Hole Growth  

SciTech Connect

There is mounting evidence for the coevolution of galaxies and their embedded massive black holes (MBHs) in a hierarchical structure formation paradigm. To tackle the nonlinear processes of galaxy-MBH interaction, we describe a self-consistent numerical framework which incorporates both galaxies and MBHs. The high-resolution adaptive mesh refinement (AMR) code Enzo is modified to model the formation and feedback of molecular clouds at their characteristic scale of 15.2 pc and the accretion of gas onto an MBH. Two major channels of MBH feedback, radiative feedback (X-ray photons followed through full three-dimensional adaptive ray tracing) and mechanical feedback (bipolar jets resolved in high-resolution AMR), are employed. We investigate the coevolution of a 9.2 x 10{sup 11} M {circle_dot} galactic halo and its 10{sup 5} {circle_dot} M embedded MBH at redshift 3 in a cosmological CDM simulation. The MBH feedback heats the surrounding interstellar medium (ISM) up to 10{sup 6} K through photoionization and Compton heating and locally suppresses star formation in the galactic inner core. The feedback considerably changes the stellar distribution there. This new channel of feedback from a slowly growing MBH is particularly interesting because it is only locally dominant and does not require the heating of gas globally on the disk. The MBH also self-regulates its growth by keeping the surrounding ISM hot for an extended period of time.

Kim, Ji-hoon; Wise, John H.; /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Princeton U., Astrophys. Sci. Dept.; Alvarez, Marcelo A.; /Canadian Inst. Theor. Astrophys.; Abel, Tom; /KIPAC, Menlo Park /Stanford U., Phys. Dept.

2011-11-04T23:59:59.000Z

142

Feedback in a cavity QED system for control of quantum beats  

E-Print Network (OSTI)

Conditional measurements on the undriven mode of a two-mode cavity QED system prepare a coherent superposition of ground states which generate quantum beats. The continuous system drive induces decoherence through the phase interruptions from Rayleigh scattering, which manifests as a decrease of the beat amplitude and an increase of the frequency of oscillation. We report recent experiments that implement a simple feedback mechanism to protect the quantum beat. We continuously drive the system until a photon is detected, heralding the presence of a coherent superposition. We then turn off the drive and let the superposition evolve in the dark, protecting it against decoherence. At a later time we reinstate the drive to measure the amplitude, phase, and frequency of the beats. The amplitude can increase by more than fifty percent, while the frequency is unchanged by the feedback.

A. D. Cimmarusti; B. D. Patterson; C. A. Schroeder; L. A. Orozco; P. Barberis-Blostein; H. J. Carmichael

2013-09-18T23:59:59.000Z

143

Design and Evaluation of a Feedback Control EDF Scheduling Algorithm *  

E-Print Network (OSTI)

Design and Evaluation of a Feedback Control EDF Scheduling Algorithm * * Supported in part by NSF. In this paper, we present a feedback control real­time scheduling algorithm and its evaluation. Performance}@cs.virginia.edu, + gt9s@virginia.edu Abstract Despite the significant body of results in real­time scheduling, many real

Son, Sang H.

144

Combinatorial Optimization with Feedback Artificial Neural Networks \\Lambda  

E-Print Network (OSTI)

Combinatorial Optimization with Feedback Artificial Neural Networks \\Lambda Carsten Peterson@thep.lu.se Abstract A brief review is given for using feedback artificial neural networks (ANN) to obtain good Neural Networks, Oc­ tober 1995, Paris, France , eds. F. Fogelman­Soulie and P. Gallinari, EC2 & Cie

Peterson, Carsten

145

Designing eco-feedback systems for everyday life  

Science Journals Connector (OSTI)

Eco-feedback systems currently frame householders as micro-resource managers, who weigh up the costs and benefits of their consumption, and make autonomous, rational and efficient decisions. Reporting on findings from a qualitative study of three Australian ... Keywords: consumption, demand management, eco-feedback, energy, smart meters, sustainable hci, water

Yolande A.A. Strengers

2011-05-01T23:59:59.000Z

146

Multistability in a semiconductor laser with optoelectronic feedback  

E-Print Network (OSTI)

Multistability in a semiconductor laser with optoelectronic feedback Guang-Qiong Xia1,2 , Sze with delayed optoelectronic feedback is observed experimentally. For a given delay time, the observed dynamical-oscillating semiconductor lasers subject to delayed optoelectronic mutual coupling," Phys. Rev. E 73, 047201-1-4 (2006) 8. G

Chan, Sze-Chun

147

POWER-EFFICIENT OFDM WITH REDUCED COMPLEXITY AND FEEDBACK OVERHEAD  

E-Print Network (OSTI)

to the transmitter. Our design exploits the correlation among sub-carriers in order to re- duce feedback overheadPOWER-EFFICIENT OFDM WITH REDUCED COMPLEXITY AND FEEDBACK OVERHEAD Antonio G. Marques Dept. of TSC subscriber lines (DSL), digital audio and video broadcasting (DAB/DVB) standards and wireless local area

Marques, Antonio Garcia

148

LINEAR FEEDBACK CONTROL OF TRANSITION IN SHEAR FLOWS  

E-Print Network (OSTI)

-100 44 Stockholm, Sweden, 2The Swedish Defense Research Agency (FOI), SE-172 90, Stockholm Sweden 3 are being developed (see Bewley, 2001, Kim, 2003). A powerful theory for linear feedback control on the control effort. The optimal feedback gains L and K can be computed independently for each wave number pair

Hoepffner, Jérôme

149

Laser Doppler vibrometer employing active frequency feedback  

SciTech Connect

We present a heterodyne Michelson interferometer for vibration measurement in which feedback is used to obviate the need to unwrap phase data. The Doppler shift of a vibrating target mirror is sensed interferometrically and compensated by means of a voltage-controlled oscillator driving an acousto-optic modulator. For frequencies within the servo bandwidth, the oscillator control voltage provides a direct measurement of the target velocity. Outside the servo bandwidth, phase-sensitive detection is used to evaluate high-frequency displacements. This approach is of great interest for the frequently-occurring situation where vibration amplitudes at low frequency exceed an optical wavelength, but knowledge of the vibration spectrum at high frequency is important as well.

Chijioke, Akobuije; Lawall, John

2008-09-20T23:59:59.000Z

150

The impact of feedback on cosmological gas accretion  

E-Print Network (OSTI)

We investigate how the way galaxies acquire their gas across cosmic time in cosmological hydrodynamic simulations is modified by a comprehensive physical model for baryonic feedback processes. To do so, we compare two simulations -- with and without feedback -- both evolved with the moving mesh code AREPO. The feedback runs implement the full physics model of the Illustris simulation project, including star formation driven galactic winds and energetic feedback from supermassive blackholes. We explore: (a) the accretion rate of material contributing to the net growth of galaxies and originating directly from the intergalactic medium, finding that feedback strongly suppresses the raw, as well as the net, inflow of this "smooth mode" gas at all redshifts, regardless of the temperature history of newly acquired gas. (b) At the virial radius the temperature and radial flux of inflowing gas is largely unaffected at z=2. However, the spherical covering fraction of inflowing gas at 0.25 rvir decreases substantially,...

Nelson, Dylan; Vogelsberger, Mark; Springel, Volker; Sijacki, Debora; Torrey, Paul; Hernquist, Lars

2014-01-01T23:59:59.000Z

151

Nonlinearity of Ocean Carbon Cycle Feedbacks in CMIP5 Earth System Models  

Science Journals Connector (OSTI)

Carbon cycle feedbacks are usually categorized into carbon–concentration and carbon–climate feedbacks, which arise owing to increasing atmospheric CO2 concentration and changing physical climate. Both feedbacks are often assumed to operate ...

Jörg Schwinger; Jerry F. Tjiputra; Christoph Heinze; Laurent Bopp; James R. Christian; Marion Gehlen; Tatiana Ilyina; Chris D. Jones; David Salas-Mélia; Joachim Segschneider; Roland Séférian; Ian Totterdell

2014-06-01T23:59:59.000Z

152

Pulsed klystrons with feedback controlled mod-anode modulators  

SciTech Connect

This paper describes a fast rise and fall, totem-pole mod-anode modulators for klystron application. Details of these systems as recently installed utilizing a beam switch tube ''on-deck'' and a planar triode ''off-deck'' in a grid-catch feedback regulated configuration will be provided. The grid-catch configuration regulates the klystron mod-anode voltage at a specified set-point during switching as well as providing a control mechanism that flat-top regulates the klystron beam current during the pulse. This flat-topped klystron beam current is maintained while the capacitor bank droops. In addition, we will review more modern on-deck designs using a high gain, high voltage planar triode as a regulating and switching element. These designs are being developed, tested, and implemented for the Los Alamos Neutron Science Center (LANSCE) accelerator refurbishment project, ''LANSCE-R''. An advantage of the planar triode is that the tube can be directly operated with solid state linear components and provides for a very compact design. The tubes are inexpensive compared to stacked semiconductor switching assemblies and also provide a linear control capability. Details of these designs are provided as well as operational and developmental results.

Reass, William A [Los Alamos National Laboratory; Baca, David M [Los Alamos National Laboratory; Jerry, Davis L [Los Alamos National Laboratory; Rees, Daniel E [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

153

E-Print Network 3.0 - adaptive limited feedback Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

0 0 5 | cartesian Feedback for High... .Onesuchlinearizationtechnique,Cartesianfeedback (CFB), makes use of analog feedback to linearize a nonlinear ... Source: Dawson, Joel -...

154

Measuring THz QCL feedback using an integrated monolithic transceiver.  

SciTech Connect

THz quantum cascade lasers are of interest for use as solid-state local-oscillators in THz heterodyne receiver systems, especially for frequencies exceeding 2 THz and for use with non-cryogenic mixers which require mW power levels. Among other criteria, to be a good local oscillator, the laser must have a narrow linewidth and excellent frequency stability. Recent phase locking measurements of THz QCLs to high harmonics of microwave frequency reference sources as high as 2.7 THz demonstrate that the linewidth and frequency stability of QCLs can be more than adequate. Most reported THz receivers employing QCLs have used discrete source and detector components coupled via mechanically aligned free-space quasioptics. Unfortunately, retroreflections of the laser off of the detecting element can lead to deleterious feedback effects. Using a monolithically integrated transceiver with a Schottky diode monolithically integrated into a THz QCL, we have begun to explore the sensitivity of the laser performance to feedback due to retroreflections of the THz laser radiation. The transceiver allows us to monitor the beat frequency between internal Fabry-Perot modes of the QCL or between a QCL mode and external radiation incident on the transceiver. When some of the power from a free running Fabry-Perot type QCL is retroreflected with quasi-static optics we observe frequency pulling, mode splitting and chaos. Given the lack of calibrated frequency sources with sufficient stability and power to phase lock a QCL above a couple THz, attempts have been made to lock the absolute laser frequency by locking the beat frequency of a multimoded laser. We have phase locked the beat frequency between Fabry-Perot modes to an {approx}13 GHz microwave reference source with a linewidth less than 1 Hz, but did not see any improvment in stability of the absolute frequency of the laser. In this case, when some laser power is retroreflected back into the laser, the absolute frequency can be pulled significantly as a function of the external path length.

Wanke, Michael Clement

2010-08-01T23:59:59.000Z

155

Blowin' in the wind: both `negative' and `positive' feedback in an obscured high-z Quasar  

E-Print Network (OSTI)

Quasar feedback in the form of powerful outflows is invoked as a key mechanism to quench star formation in galaxies, preventing massive galaxies to over-grow and producing the red colors of ellipticals. On the other hand, some models are also requiring `positive' AGN feedback, inducing star formation in the host galaxy through enhanced gas pressure in the interstellar medium. However, finding observational evidence of the effects of both types of feedback is still one of the main challenges of extragalactic astronomy, as few observations of energetic and extended radiatively-driven winds are available. Here we present SINFONI near infrared integral field spectroscopy of XID2028, an obscured, radio-quiet z=1.59 QSO detected in the XMM-COSMOS survey, in which we clearly resolve a fast (1500 km/s) and extended (up to 13 kpc from the black hole) outflow in the [OIII] lines emitting gas, whose large velocity and outflow rate are not sustainable by star formation only. The narrow component of Ha emission and the re...

Cresci, G; Brusa, M; Marconi, A; Perna, M; Mannucci, F; Piconcelli, E; Maiolino, R; Feruglio, C; Fiore, F; Bongiorno, A; Lanzuisi, G; Merloni, A; Schramm, M; Silverman, J D; Civano, F

2014-01-01T23:59:59.000Z

156

Improved Prediction of the Temperature Feedback in TRISO-Fueled Reactors  

SciTech Connect

The Doppler feedback mechanism is a major contributor to the passive safety of gas-cooled, graphite-moderated high temperature reactors that use fuel based on Tristructural-Isotropic coated particles. It follows that the correct prediction of the magnitude and time-dependence of this feedback effect is essential to the conduct of safety analyses for these reactors. We present a fuel conduction model for obtaining better estimates of the temperature feedback during moderate and fast transients. The fuel model has been incorporated in the CYNOD-THERMIX-KONVEK suite of coupled codes as a single TRISO particle within each calculation cell. The heat generation rate is scaled down from the neutronic solution and a Dirichlet boundary condition is imposed as the bulk graphite temperature from the thermal-hydraulic solution. This simplified approach yields similar results to those obtained with more complex methods, requiring multi-TRISO calculations within one control volume, but with much less computational effort. An analysis of the hypothetical total control ejection in the PBMR-400 design verifies the performance of the code during fast transients. In addition, the analysis of the earthquake-initiated event in the PBMR-400 design verifies the performance of the code during slow transients. These events clearly depict the improvement in the predictions of the fuel temperature, and consequently, of the power escalations. In addition, a brief study of the potential effects of particle layer de-bonding on the transient behavior of high temperature reactors is included. Although the formation of a gap occurs under special conditions its consequences on the dynamic behavior of the reactor should be analyzed. The presence of a gap in the fuel can cause some unusual reactor behavior during fast transients, but still the reactor shuts down due to the strong feedback effects.

Javier Ortensi; Abderrafi M. Ougouag

2009-08-01T23:59:59.000Z

157

Data, Feedback, & Awareness Lead to Big Energy Savings  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

monthly energy feedback and monthly energy feedback and "staff monitors" to reinforce commu- nication and activity led to improved routine practices and significant energy savings. Members of the Navy Region Southwest Metro San Diego regional energy management team with an example poster from their energy awareness program. (Photo courtesy FEMP/NRSMSD.) Data, Feedback, & Awareness Lead to Big Energy Savings The Navy Region Southwest Metro San Diego Area (NRSMSD) regional energy management team achieved significant energy savings at the three major complexes: Naval Base Coronado, Naval Base San Diego, and Naval Base Point Loma, result- ing largely from a well organized energy awareness program centered on energy data

158

Data, Feedback, & Awareness Lead to Big Energy Savings  

NLE Websites -- All DOE Office Websites (Extended Search)

energy feedback and energy feedback and "staff monitors" to reinforce commu- nication and activity led to improved routine practices and significant energy savings. Members of the Navy Region Southwest Metro San Diego regional energy management team with an example poster from their energy awareness program. (Photo courtesy FEMP/NRSMSD.) Data, Feedback, & Awareness Lead to Big Energy Savings The Navy Region Southwest Metro San Diego Area (NRSMSD) regional energy management team achieved significant energy savings at the three major complexes: Naval Base Coronado, Naval Base San Diego, and Naval Base Point Loma, result- ing largely from a well organized energy awareness program centered on energy data

159

Feedback stabilization of disruption precursors in a tokamak  

Science Journals Connector (OSTI)

Magnetic feedback control has been used in the DITE tokamak to substantially reduce saturated m=2, n=1 instabilities in both Ohmic discharges and discharges with lower hybrid current drive (LHCD). Feedback has been used for the first time to significantly increase the disruptive density limit in a tokamak. LHCD on DITE stabilizes the sawtooth instability but generates a large m=1,2, n=1 instability. Both components of this mode have been controlled for the first time with feedback. Open loop experiments with LHCD show that mode locking occurs and allow detailed study of this phenomenon.

A. W. Morris; T. C. Hender; J. Hugill; P. S. Haynes; P. C. Johnson; B. Lloyd; D. C. Robinson; C. Silvester; S. Arshad; G. M. Fishpool

1990-03-12T23:59:59.000Z

160

Geothermal Stakeholder Feedback on the GRR | OpenEI Community  

Open Energy Info (EERE)

Geothermal Stakeholder Feedback on the GRR Geothermal Stakeholder Feedback on the GRR Home > Groups > Geothermal Regulatory Roadmap Kyoung's picture Submitted by Kyoung(155) Contributor 13 December, 2012 - 10:01 feedback GRR As we head into the holiday season, we thought we'd share with you some of the feedback we've received from industry, agency, consultant and other stakeholder personnel. Thanks again to all, and Happy Holidays! General "GRR is a much needed tool for navigating the geothermal regulatory environment. It will go a long way towards facilitating more geothermal energy development." (agency) "Very impressive product. The workshop [at GRC] was very helpful and thought provoking. Participants very engaged." (industry) "Good, forward-thinking initiative. Highly needed."

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

CRAD, Feedback and Continuous - Contractor - December 4, 2007 | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Feedback and Continuous - Contractor - December 4, 2007 Feedback and Continuous - Contractor - December 4, 2007 CRAD, Feedback and Continuous - Contractor - December 4, 2007 December 4, 2007 Feedback and Continuous Improvement Inspection Criteria and Approach - Contractor (HSS CRAD 64-20) Contractor management has established a comprehensive and integrated contractor assurance system for ensuring the protection of the public, workers, environment and national security assets through continuous improvement for environment, safety, and health; safeguards and security; cyber security; and emergency management. The contractor's assurance system programs and processes are in accordance with the policy and key elements outlined in DOE Policy 226.1, Department of Energy Oversight Policy, DOE Order 226.1 A, Implementation of Department of Energy Oversight Policy,

162

Feedback Wanted: Help the Energy Department Go Mobile, Open Data! |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Feedback Wanted: Help the Energy Department Go Mobile, Open Data! Feedback Wanted: Help the Energy Department Go Mobile, Open Data! Feedback Wanted: Help the Energy Department Go Mobile, Open Data! August 13, 2012 - 4:35pm Addthis The Energy Department’s main site, Energy.gov and its contents, are now available on the go. This allows users to access the Energy Departments’ resources over a variety of mobile devices such as smart phones and tablets. The Energy Department's main site, Energy.gov and its contents, are now available on the go. This allows users to access the Energy Departments' resources over a variety of mobile devices such as smart phones and tablets. Alex Cohen Alex Cohen Senior Digital Information Strategist The Energy Department needs your feedback! To support the Federal Digital Strategy, the Department has created mobile

163

Information and Feedback Institutional Change Principle | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Information and Feedback Institutional Change Principle Information and Feedback Institutional Change Principle Information and Feedback Institutional Change Principle October 8, 2013 - 11:07am Addthis Information alone, however, is unlikely to lead to action. Federal and commercial programs have demonstrated reductions in energy use from delivery of reports to customers. By providing actionable information and feedback that are tailored to specific workplace situations, Federal agencies can help to spur and maintain behaviors that save energy and resources. Methods However, for sustainability, providing information to create awareness and engagement may be an important component of an action plan. People often have to contend with information overload. Therefore, recipients need to see the information and resources provided as salient and, ideally, useful

164

CRAD, Feedback and Continuous Improvement - DOE Headquarters - December 4,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CRAD, Feedback and Continuous Improvement - DOE Headquarters - CRAD, Feedback and Continuous Improvement - DOE Headquarters - December 4, 2007 CRAD, Feedback and Continuous Improvement - DOE Headquarters - December 4, 2007 December 4, 2007 Feedback and Continuous Improvement Inspection Criteria and Approach - DOE Headquarters (HSS CRAD 64-22) The Department of Energy (DOE) Headquarters line management has established and implemented effective oversight processes that evaluate the adequacy and effectiveness of field element assurance systems and DOE oversight processes. DOE Headquarters assurance system programs and processes are in accordance with the policy and key elements outlined in DOE Policy 226.1, Department of Energy Oversight Policy; DOE Order 226. 1A, Implementation of Department of Energy Oversight Policy, Attachment 2, quality assurance

165

CRAD, Feedback and Continuous Improvement - December 4, 2012 | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Feedback and Continuous Improvement - December 4, 2012 Feedback and Continuous Improvement - December 4, 2012 CRAD, Feedback and Continuous Improvement - December 4, 2012 December 4, 2012 Feedback and Continuous Improvement Inspection Criteria and Approach - DOE Field Element (HSS CRAD 45-21, Rev. 1) DOE field element line management has established and implemented effective oversight processes that evaluate the adequacy and effectiveness of contractor assurance systems and DOE oversight processes. DOE field element assurance system programs and processes are in accordance with the policy and key elements outlined in DOE Policy 226.1 B, Department of Energy Oversight Policy; DOE Order 226.1 B, Implementation of Department of Energy Oversight Policy, Attachment 2; quality assurance requirements (as stated in 10 CFR 830, Subpart A, DOE 0 414.1D Quality Assurance and/ or

166

Comparative analysis of aviation safety information feedback systems  

E-Print Network (OSTI)

In the aviation system, there are several feedback systems to prevent an accident. First of all, the accident and serious incident reporting and investigation system is established by the Chicago Convention. In general, ...

Funahashi, Yoshifuru

2010-01-01T23:59:59.000Z

167

Bursting in a Subcritical Hopf Oscillator with a Nonlinear Feedback  

E-Print Network (OSTI)

Bursting is a periodic transition between a quiescent state and a state of repetitive spiking. The phenomenon is ubiquitous in a variety of neurophysical systems. We numerically study the dynamical properties of a normal form of subcritical Hopf oscillator (at the bifurcation point) subjected to a nonlinear feedback. This dynamical system shows an infinite-period or a saddle-node on a limit cycle (SNLC) bifurcation for certain strengths of the nonlinear feedback. When the feedback is time delayed, the bifurcation scenario changes and the limit cycle terminates through a homoclinic or a saddle separatrix loop (SSL) bifurcation. This system when close to the bifurcation point exhibits various types of bursting phenomenon when subjected to a slow periodic external stimulus of an appropriate strength. The time delay in the feedback enhances the spiking rate i.e. reduces the interspike interval in a burst and also increases the width or the duration of a burst.

Gautam C Sethia; Abhijit Sen

2006-03-24T23:59:59.000Z

168

Continuous execution : improving user feedback in the development cycle  

E-Print Network (OSTI)

Programming environments are increasing the amount of feedback given to users during the development cycle. This work continues with this trend by exploring continuous execution, a programming environment where the result ...

Su, Kevin

2007-01-01T23:59:59.000Z

169

Reduction of stuttering by young male stutterers using EMG feedback  

Science Journals Connector (OSTI)

A clinical program was designed in which male stutterers (age 10–14 years) were trained to reduce speech muscle tension by application of electromyograph (EMG) feedback. The program was designed (a) to reduce non...

Ashley R. Craig; Patrick J. Cleary

1982-09-01T23:59:59.000Z

170

Transmit beamforming for multiple antenna systems with imperfect feedback  

E-Print Network (OSTI)

channel estimation (PCE) at the receiver is investigatedImperfect Channel Feedback PCE: Perfect Channel EstimationICE and ICF; Ana N=2; B=2; PCE, No Delay; Sim N=2; B=2; PCE,

Isukapalli, Yogananda R.

2009-01-01T23:59:59.000Z

171

Instabilities simulations with wideband feedback systems: CMAD, HEADTAIL, WARP  

E-Print Network (OSTI)

Transverse mode coupling (TMCI) and electron cloud instabilities (ECI) pose fundamental limitations on the acceptable beam intensities in the SPS at CERN. This in turn limits the ultimate achievable luminosity in the LHC. Therefore, future luminosity upgrades foresee methods for evading TMCI as well as ECI. Proposed approaches within the LHC Injector Upgrade (LIU) project include new optics with reduced transition energy as well as vacuum chamber coating techniques. As a complementary option, high bandwidth feedback systems may provide instability mitigation by actively damping the intra-bunch motion of unstable modes. In an effort to evaluate the potentials and limitations of such feedback systems and to characterise some of the specifications, a numerical model of a realistic feedback system has been developed and integrated into available instabilities simulation codes. Together with the implementation of this new feedback system model, CMAD and HEADTAIL have been used to investigate the impact of differen...

Li, Kevin; Fox, J D; Pivi, M; Rivetta, C; Rumolo, G

2013-01-01T23:59:59.000Z

172

Optimization of neural network feedback control systems using automatic differentiation  

E-Print Network (OSTI)

Optimal control problems can be challenging to solve, whether using analytic or numerical methods. This thesis examines the application of an adjoint method for optimal feedback control, which combines various algorithmic ...

Rollins, Elizabeth, S.M. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

173

Power capping in SLURM First prototype results and feedback  

E-Print Network (OSTI)

Power capping in SLURM First prototype results and feedback Green days @Lille, November 2013;Green days @Lille, November 2013 | Matthieu Hautreux | 2/27 Power capping Green days @Lille, November 2013 | Matthieu Hautreux | 3/27 Power capping

Lefèvre, Laurent

174

Microcomputer-based information feedback system for improving tractor efficiency  

E-Print Network (OSTI)

MICROCOMPUTER-BASED INFORMATION FEEDBACK SYSTEM FOR IMPROVING TRACTOR EFFICIENCY A Thesis by JOSEPH GROGAN Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1985 Major Subject: Agricultural Engineering MICROCOMPUTER-BASED INFORMATION FEEDBACK SYSTEM FOR IMPROVING TRACTOR EFFICIENCY A Thesis JOSEPH GROGAN Approved as to style and content by: Dr. ill A. Stout (Chairman of Committee) Dr...

Grogan, Joseph

2012-06-07T23:59:59.000Z

175

Cell signaling systems that contain positive-feedback loops or double-negative feedback loops can, in principle, convert  

E-Print Network (OSTI)

. These circuits were originally envisioned as ways of achieving self-sustaining patterns of gene expression, but it is easy to see how double-negative feedback at a post-translational level could produce self-sustaining

176

AMEAerospace & Mechanical  

E-Print Network (OSTI)

AMEAerospace & Mechanical Engineering #12;Aerospace and Mechanical Engineers design complex mechanical, thermal, fluidic, acousti- cal, optical, and electronic systems, with char- acteristic sizes space. Aerospace and Mechanical Engineering (AME) students conduct basic and applied research within

Wang, Hai

177

Computer Science at Kent Electrophysiological Feedback in  

E-Print Network (OSTI)

of whether a stimulus has been perceived: 1) reduced EEG power in the alpha band at posterior brain areas into a head-mounted wearable display that is electrically isolated from the surroundings by optical input to process them. The human brain has evolved a sophisticated attentional mechanism to pick and choose what

Kent, University of

178

Gas Feedback on Stellar Bar Evolution  

E-Print Network (OSTI)

We analyze evolution of live disk-halo systems in the presence of various gas fractions, f_gas less than 8% in the disk. We addressed the issue of angular momentum (J) transfer from the gas to the bar and its effect on the bar evolution. We find that the weakening of the bar, reported in the literature, is not related to the J-exchange with the gas, but is caused by the vertical buckling instability in the gas-poor disks and by a steep heating of a stellar velocity dispersion by the central mass concentration (CMC) in the gas-rich disks. The gas has a profound effect on the onset of the buckling -- larger f_gas brings it forth due to the more massive CMCs. The former process leads to the well-known formation of the peanut-shaped bulges, while the latter results in the formation of progressively more elliptical bulges, for larger f_gas. The subsequent (secular) evolution of the bar differs -- the gas-poor models exhibit a growing bar while gas-rich models show a declining bar whose vertical swelling is driven by a secular resonance heating. The border line between the gas-poor and -rich models lies at f_gas ~ 3% in our models, but is model-dependent and will be affected by additional processes, like star formation and feedback from stellar evolution. The overall effect of the gas on the evolution of the bar is not in a direct J transfer to the stars, but in the loss of J by the gas and its influx to the center that increases the CMC. The more massive CMC damps the vertical buckling instability and depopulates orbits responsible for the appearance of peanut-shaped bulges. The action of resonant and non-resonant processes in gas-poor and gas-rich disks leads to a converging evolution in the vertical extent of the bar and its stellar dispersion velocities, and to a diverging evolution in the bulge properties.

Ingo Berentzen; Isaac Shlosman; Inma Martinez-Valpuesta; Clayton Heller

2007-05-27T23:59:59.000Z

179

Feedback control of edge turbulence in a tokamak  

Science Journals Connector (OSTI)

An experiment on feedback control of edge turbulence has been undertaken on the KT-5C tokamak. The results indicate that the edge turbulence could be suppressed or enhanced depending on the phase shift of the feedback network. In a typical case of 90° phase shift feedback, the turbulence amplitudes of both T-tildee and ñe were reduced by about 25% when the gain of the feedback network was 15. Correspondingly the radial particle flux decreased to about 75% level of the background. Through bispectral analysis it is found that there exists a substantial nonlinear coupling between various modes comprised in edge turbulence, especially in the frequency range from about 10 kHz to 100 kHz, which contains the large part of the edge turbulence energy in KT-5C tokamak. In particular, by actively controlling the turbulence amplitude using feedback, a direct experimental evidence of the link between the nonlinear wave-wave coupling over the whole spectrum in turbulence, the saturated turbulence amplitude, and the radial particle flux was provided.

Zhai Kan; Wen Yi-zhi; Yu Chang-xuan; Liu Wan-dong; Wang Chao; Zhuang Ge; Xu Zhi-zhan

1997-03-01T23:59:59.000Z

180

Position feedback system for volume holographic storage media  

DOE Patents (OSTI)

A method of holographic recording in a photorefractive medium wherein stored holograms may be retrieved with maximum signal-to noise ratio (SNR) is disclosed. A plurality of servo blocks containing position feedback information is recorded in the crystal and made non-erasable by heating the crystal. The servo blocks are recorded at specific increments, either angular or frequency, depending whether wavelength or angular multiplexing is applied, and each servo block is defined by one of five patterns. Data pages are then recorded at positions or wavelengths enabling each data page to be subsequently reconstructed with servo patterns which provide position feedback information. The method of recording data pages and servo blocks is consistent with conventional practices. In addition, the recording system also includes components (e.g. voice coil motor) which respond to position feedback information and adjust the angular position of the reference angle of a reference beam to maximize SNR by reducing crosstalk, thereby improving storage capacity.

Hays, Nathan J. (San Francisco, CA); Henson, James A. (Morgan Hill, CA); Carpenter, Christopher M. (Sunnyvale, CA); Akin, Jr.. William R. (Morgan Hill, CA); Ehrlich, Richard M. (Saratoga, CA); Beazley, Lance D. (San Jose, CA)

1998-07-07T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Numerical simulation of optical feedback on a quantum dot lasers  

SciTech Connect

We use multi-population rate equations model to study feedback oscillations in the quantum dot laser. This model takes into account all peculiar characteristics in the quantum dots such as inhomogeneous broadening of the gain spectrum, the presence of the excited states on the quantum dot and the non-confined states due to the presence of wetting layer and the barrier. The contribution of quantum dot groups, which cannot follow by other models, is simulated. The results obtained from this model show the feedback oscillations, the periodic oscillations which evolves to chaos at higher injection current of higher feedback levels. The frequency fluctuation is attributed mainly to wetting layer with a considerable contribution from excited states. The simulation shows that is must be not using simple rate equation models to express quantum dots working at excited state transition.

Al-Khursan, Amin H., E-mail: ameen_2all@yahoo.com [Thi-Qar University, Nassiriya Nanotechnology Research Laboratory (NNRL), Science College (Iraq); Ghalib, Basim Abdullattif [Babylon University, Laser Physics Department, Science College for Women (Iraq); Al-Obaidi, Sabri J. [Al-Mustansiriyah University, Physics Department, Science College (Iraq)

2012-02-15T23:59:59.000Z

182

Second Law of Thermodynamics with Discrete Quantum Feedback Control  

Science Journals Connector (OSTI)

A new thermodynamic inequality is derived which leads to the maximum work that can be extracted from multi-heat-baths with the assistance of discrete quantum feedback control. The maximum work is determined by the free-energy difference and a generalized mutual information content between the thermodynamic system and the feedback controller. This maximum work can exceed that in conventional thermodynamics and, in the case of a heat cycle with two heat baths, the heat efficiency can be greater than that of the Carnot cycle. The consistency of our results with the second law of thermodynamics is ensured by the fact that work is needed for information processing of the feedback controller.

Takahiro Sagawa and Masahito Ueda

2008-02-26T23:59:59.000Z

183

A Feedback Model for Radio Sources Fueled by Cooling Flows  

Science Journals Connector (OSTI)

In many clusters of galaxies, radiative cooling in the central regions appears to drive an accretion flow. Many of these "cooling-flow clusters" possess strong radio sources in the central regions, which suggests a causal relation between the cooling flow and the radio source. We consider a general model in which a cooling flow produces and interacts with relativistic electrons in the core of the cluster. These electrons heat the inflowing gas, generating negative feedback that reduces the accretion rate. For sufficiently strong feedback, the accretion flow shows an oscillatory behavior on a timescale of several hundred million years.

Wallace Tucker; Laurence

1997-01-01T23:59:59.000Z

184

Molecular Cloud Evolution. III. Accretion Versus Stellar Feedback  

Science Journals Connector (OSTI)

We numerically investigate the effect of feedback from the ionization heating from massive stars on the evolution of giant molecular clouds (GMCs) and their star formation efficiency (SFE), which we treat as an instantaneous, time-dependent quantity. We follow the GMCs' evolution from their formation to advanced star-forming stages. After an initial period of contraction, the collapsing clouds begin forming stars, whose feedback evaporates part of the clouds' mass, opposing the continuing accretion from the infalling gas. Our results are as follows: (1) in the presence of feedback, the clouds attain levels of the SFE that are consistent at all times with observational determinations for regions of comparable star formation rates. (2) However, the dense gas mass is larger in general in the presence of feedback, while the total mass (dense gas + stars) is nearly insensitive to the presence of feedback, suggesting that it is determined mainly by the accretion, while the feedback inhibits mainly the conversion of dense gas to stars, because it acts directly to reheat and disperse the gas that is directly on its way to forming stars. (3) The factor by which the SFE is reduced upon the inclusion of feedback is a decreasing function of the cloud's mass, for clouds of size ~10 pc. This naturally explains the larger observed SFEs of massive-star-forming regions. (4) The clouds may attain a pseudo-virialized state, with a value of the virial mass very similar to the actual cloud mass. However, this state differs from true virialization in that the clouds, rather than being equilibrium entities, are the centers of a larger-scale collapse, in which accretion replenishes the mass consumed by star formation. (5) The higher-density regions within the clouds are in a similar situation, accreting gas infalling from the less-dense, more extended regions of the clouds. (6) The density probability density functions of the regions containing the clouds in general exhibit a shape characteristic of thermally bistable flows, and extend down to densities corresponding to the warm atomic medium, because the warm gas interpenetrates the clouds. The general picture arising from our simulations is that the gas involved in the gravitational contraction leading to star formation extends to large scales and is not confined to the local environment of the final collapse, where the effect of the feedback is active, in agreement with recent proposals of a gravitationally driven mass cascade from large to small scales.

Enrique Vázquez-Semadeni; Pedro Colín; Gilberto C. Gómez; Javier Ballesteros-Paredes; Alan W. Watson

2010-01-01T23:59:59.000Z

185

Essays on Macroeconomics and Oil  

E-Print Network (OSTI)

Oil Production in Venezuela and Mexico . . . . . . . . . .Venezuela with Mexico, another major oil pro- ducing countryOil Production and Productivity in Venezuela and Mexico . . . . . . . .

CAKIR, NIDA

2013-01-01T23:59:59.000Z

186

Essays on Macroeconomics and Oil  

E-Print Network (OSTI)

Oil Production in Venezuela and Mexico . . . . . . . . . .Oil Production and Productivity in Venezuela and Mexico . . . . . . . .2.6: Oil Production in Venezuela and Mexico 350 Productivity

CAKIR, NIDA

2013-01-01T23:59:59.000Z

187

Essays on Macroeconomics and Oil  

E-Print Network (OSTI)

Oil Production . . . . . . . . . . . . . . . . . . . . . . . . . . .Oil Production in Venezuela and Mexico . . . . . . . . . .Oil Production and Productivity in Venezuela and

CAKIR, NIDA

2013-01-01T23:59:59.000Z

188

Essays on Macroeconomics and Oil  

E-Print Network (OSTI)

the Oil Industry . . . . . . . . . . . . . . . . . . . . . .in the Venezuelan Oil Industry . . . . . . . . . . . . .and Productivity: Evidence from the Oil Industry . .

CAKIR, NIDA

2013-01-01T23:59:59.000Z

189

Essays on Macroeconomics and Oil  

E-Print Network (OSTI)

Oil Production in Venezuela and Mexico . . . . . . . . . .and Productivity in Venezuela and Mexico . . . . . . . . OilEllner, ”Organized Labor in Venezuela 1958-1991: Behavior

CAKIR, NIDA

2013-01-01T23:59:59.000Z

190

Essays on Open Economy Macroeconomics  

E-Print Network (OSTI)

of Philosophy in Economics by Mi Lu June 2013 DissertationArnott Jana Grittersova Aman Ullah Copyright by Mi Lu TheDissertation of Mi Lu is approved: Committee Chairperson

Lu, Mi

2013-01-01T23:59:59.000Z

191

Essays on macroeconomics and forecasting  

E-Print Network (OSTI)

explanatory variables. Compared to Stock and Watson (2002)�s models, the models proposed in this chapter can further allow me to select the factors structurally for each variable to be forecasted. I find advantages to using the structural dynamic factor...

Liu, Dandan

2006-10-30T23:59:59.000Z

192

Quantifying Climate Feedbacks from Abrupt Changes in High-Latitude Trace-Gas Emissions  

SciTech Connect

Our overall goal was to quantify the potential for threshold changes in natural emission rates of trace gases, particularly methane and carbon dioxide, from pan-arctic terrestrial systems under the spectrum of anthropogenically forced climate warming, and the extent to which these emissions provide a strong feedback mechanism to global climate warming. This goal is motivated under the premise that polar amplification of global climate warming will induce widespread thaw and degradation of the permafrost, and would thus cause substantial changes in the extent of wetlands and lakes, especially thermokarst (thaw) lakes, over the Arctic. Through a coordinated effort of field measurements, model development, and numerical experimentation with an integrated assessment model framework, we have investigated the following hypothesis: There exists a climate-warming threshold beyond which permafrost degradation becomes widespread and thus instigates strong and/or sharp increases in methane emissions (via thermokarst lakes and wetland expansion). These would outweigh any increased uptake of carbon (e.g. from peatlands) and would result in a strong, positive feedback to global climate warming.

Schlosser, Courtney Adam [MIT; Walter-Anthony, Katey [University of Alaska; Zhuang, Qianlai [Purdue University; Melillo, Jerry [Marine Biological Laboratory

2013-04-26T23:59:59.000Z

193

The Dynamic Template Mechanism - A Co-Ordination Role for Shear, Thermal and Electrical Stressors in Muscle Cell Contraction  

E-Print Network (OSTI)

The Dynamic Template is applied to muscle cells, and is shown to provide a feedback mechanism that can co-ordinate the rearrangements of cytoskeletal proteins that accompany contraction

J. T. Lofthouse

2008-07-12T23:59:59.000Z

194

Scheduling and Feedback Co-Design for Networked Control Systems  

E-Print Network (OSTI)

Scheduling and Feedback Co-Design for Networked Control Systems Michael S. Branicky,1 Stephen M mes- sages are transmitted). In the past, control system design and CPU scheduling or network scheduling design have normally been sepa- rated. This separation has allowed the control commu- nity

Branicky, Michael S.

195

Cyclic negative feedback systems: what is the chance of oscillation?  

E-Print Network (OSTI)

self-feedback affects the dynamical behaviour. In the high cooperativity limit, i.e. for large Hill a recurrent motif. Oscillations frequently occur in the regulation of biological systems and play)), the cardiac electrical activity (Keener and Sneyd (1998)), the circadian rhythm (Goldbeter (2002

Boyer, Edmond

196

SURVEY LEADERSHIP The Manager's Guide to Survey Feedback & Action Planning  

E-Print Network (OSTI)

Planning Tools from Morehead A Word about Morehead's Workforce Commitment Model Technical Support Section 2 Activities Appendices Appendix 1 ­ Workforce Commitment Domains Summary Appendix 2 ­ Action Plan Form #12SURVEY LEADERSHIP The Manager's Guide to Survey Feedback & Action Planning A guide designed to help

Squire, Larry R.

197

Output-feedback stabilization of an unstable wave equation  

Science Journals Connector (OSTI)

We consider the problem of stabilization of a one-dimensional wave equation that contains instability at its free end and control on the opposite end. In contrast to classical collocated ''boundary damper'' feedbacks for the neutrally stable wave equations ... Keywords: Backstepping, Boundary control, Distributed parameter systems, Stabilization, Wave equation

Miroslav Krstic; Bao-Zhu Guo; Andras Balogh; Andrey Smyshlyaev

2008-01-01T23:59:59.000Z

198

Negative Feedback Facilitates Temperature Robustness in Biomolecular Circuit Dynamics  

E-Print Network (OSTI)

on circuit dynamics. Further, we find that eective negative feedback due to first-order degradation this goal of functional robustness have proceeded at multiple levels. At one level, there have been eorts, in the study of naturally occurring biomolecular circuits, robustness to the impor- tant environmental variable

Murray, Richard M.

199

Modes of Operation: Der Cipher Feedback Steffen Reith  

E-Print Network (OSTI)

Modes of Operation: Der Cipher Feedback Mode (CFB) Steffen Reith 7. Mai 2005 Der CFB-Mode wird Shiftr Bits Shift ic r Bitsr Bits rn n r n n r r Der CFB-Mode 1 Dies ist mit Hilfe der Abbildung leicht

Vollmer, Heribert

200

The entropy distribution in clusters: evidence of feedback?  

E-Print Network (OSTI)

The entropy of the intracluster medium at large radii has been shown recently to deviate from the self-similar scaling with temperature. Using N-body/hydrodynamic simulations of the LCDM cosmology, we demonstrate that this deviation is evidence that feedback processes are important in generating excess entropy in clusters. While radiative cooling increases the entropy of intracluster gas, resulting in a good match to the data in the centres of clusters, it produces an entropy-temperature relation closer to the self-similar scaling at larger radii. A model that includes feedback from galaxies, however, not only stabilises the cooling rate in the simulation, but is capable of reproducing the observed scaling behaviour both in cluster cores and at large radii. Feedback modifies the entropy distribution in clusters due to its increasing ability at expelling gas from haloes with decreasing mass. The strength of the feedback required, as suggested from our simulations, is consistent with supernova energetics, providing a large fraction of the energy reaches low-density regions and is originally contained within a small mass of gas.

Scott T. Kay

2003-11-10T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Human cortical sensorimotor network underlying feedback control of vocal pitch  

Science Journals Connector (OSTI)

...self-produced speech are suppressed (listening > speaking). Self-vocalization...pitch feedback (speaking > listening) (23), a phenomenon called...digital signal-processing device (DSP) to induce real-time pitch...differed between speaking and listening. (High-{gamma...

Edward F. Chang; Caroline A. Niziolek; Robert T. Knight; Srikantan S. Nagarajan; John F. Houde

2013-01-01T23:59:59.000Z

202

Mass, metal, and energy feedback in cosmological simulations  

Science Journals Connector (OSTI)

......approaches of feedback: thermal and kinetic. Kobayashi...velocities that do not overheat the IGM (OD06). Continual...Grevesse (1989) for solar abundances throughout...from stars over 40 Mo at solar metallicity, but do...predicted v wind for solar metallicity, assuming......

Benjamin D. Oppenheimer; Romeel Davé

2008-06-21T23:59:59.000Z

203

Author's personal copy Feedback control and optimization for the production  

E-Print Network (OSTI)

, the blending objectives are to produce a mixture with some prescribed properties. For gasoline, diesel or fuel by blending M. Chèbre a , Y. Creff b , N. Petit c,* a Advanced Process Control Department, Technical Direction Accepted 31 January 2010 Keywords: Blending Commercial fuel Feedback control Optimization Constraints

204

Human cortical sensorimotor network underlying feedback control of vocal pitch  

E-Print Network (OSTI)

Human cortical sensorimotor network underlying feedback control of vocal pitch Edward F. Changa,1 control of pitch using direct cortical recordings. Subjects phonated while a real-time signal processor briefly perturbed their output pitch (speak condition). Subjects later heard the same recordings

Knight, Robert T.

205

Filtering Semi-Structured Documents Based on Faceted Feedback  

E-Print Network (OSTI)

Filtering Semi-Structured Documents Based on Faceted Feedback Lanbo Zhang, Yi Zhang School on documents. In some cases, users have some prior knowledge about what features are important for a document document should contain the feature "Language: Spanish"; a researcher working on HIV knows an article

Zhang, Yi

206

Contextual Video Recommendation by Multimodal Relevance and User Feedback  

Science Journals Connector (OSTI)

With Internet delivery of video content surging to an unprecedented level, video recommendation, which suggests relevant videos to targeted users according to their historical and current viewings or preferences, has become one of most pervasive online ... Keywords: Video recommendation, image retrieval, relevance feedback

Tao Mei; Bo Yang; Xian-Sheng Hua; Shipeng Li

2011-04-01T23:59:59.000Z

207

Distributed feedback laser biosensor incorporating a titanium dioxide nanorod surface  

E-Print Network (OSTI)

Distributed feedback laser biosensor incorporating a titanium dioxide nanorod surface Chun Ge,1 emission wavelength is modulated by the adsorption of biomolecules, whose greater dielectric permittivity- dimensional volume overlap between the DFBLB resonant mode and the region where biomolecule adsorption can oc

Cunningham, Brian

208

Feeling molecular forces: tactile feedback to enhance drug design  

E-Print Network (OSTI)

. The programming language used was C with some C++ constructs and the OpenGL graphics library for the graphics implementation. The optimized code running with the system has proven capable of calculating and relaying tactile feedback between a 100-atom active site...

Williams, Jocylin Amber

2013-02-22T23:59:59.000Z

209

Molecular cloud evolution – V. Cloud destruction by stellar feedback  

Science Journals Connector (OSTI)

......particles injected energy at a rate corresponding...Perault 1999, 2000; Audit Hennebelle 2005...2006; Hennebelle Audit 2007; Heitsch Hartmann...feedback all injected energy into the medium at...Because the thermal energy was dumped only in...GCG. REFERENCES Audit E. , Hennebelle......

Pedro Colín; Enrique Vázquez-Semadeni; Gilberto C. Gómez

2013-01-01T23:59:59.000Z

210

Dynamic bifurcations: hysteresis, scaling laws and feedback control  

E-Print Network (OSTI)

slowly in time, for instance: #15; parameters which may be diÃ?cult to control, such as the temperature, such as the temperature di#11;erence in a convection experiment or the supply voltage of an electrical device, whichDynamic bifurcations: hysteresis, scaling laws and feedback control N. Berglund School of Physics

Berglund, Nils

211

Applying logistic regression to relevance feedback in image retrieval systems  

Science Journals Connector (OSTI)

This paper deals with the problem of image retrieval from large image databases. A particularly interesting problem is the retrieval of all images which are similar to one in the user's mind, taking into account his/her feedback which is expressed as ... Keywords: Content-based image retrieval systems, Logistic regression, Low-level image descriptors, Visual information retrieval

T. León; P. Zuccarello; G. Ayala; E. de Ves; J. Domingo

2007-10-01T23:59:59.000Z

212

Investigating the effectiveness of tactile feedback for mobile touchscreens  

Science Journals Connector (OSTI)

This paper presents a study of finger-based text entry for mobile devices with touchscreens. Many devices are now coming to market that have no physical keyboards (the Apple iPhone being a very popular example). Touchscreen keyboards lack any tactile ... Keywords: fingertip interaction, mobile interaction, multimodal interaction, tactile feedback, touchscreens

Eve Hoggan; Stephen A. Brewster; Jody Johnston

2008-04-01T23:59:59.000Z

213

Energy Balance Partitioning and Net Radiation Controls on Soil Moisture – Precipitation Feedbacks  

E-Print Network (OSTI)

occurs. Higher-resolution runs are generally associated with a higher information content. This may provide a methodology for monitoring land– atmosphere feedbacks via remotely sensed soil moisture and vegetation fields through statistical knowledge... involve positive feedbacks, evidence also supports the existence of negative soil moisture–precipitation feedbacks. Negative feedbacks are associated with an increase in sensible heat flux over dry soils, which can lead to an increase in turbulent mixing...

Jones, Aubrey R.; Brunsell, Nathaniel A.

2009-01-14T23:59:59.000Z

214

Positive Proprioceptive Feedback Elicited By Isometric Contractions of Ankle Flexors on Pretibial Motoneurons in Cats  

E-Print Network (OSTI)

Positive Proprioceptive Feedback Elicited By Isometric Contractions of Ankle Flexors on Pretibial proprioceptive feedback elicited by isometric contractions of ankle flexors on pretibial motoneurons in cats. J inhibition. This contraction-induced Ia excitatory feedback in ankle flexors might either reinforce Ia

215

Monolithic amplifier with stable, high resistance feedback element and method for fabricating the same  

DOE Patents (OSTI)

A monolithic amplifier includes a stable, high resistance feedback circuit and a dynamic bias circuit. The dynamic bias circuit is formed with active elements matched to those in the amplifier and feedback circuit to compensate for variations in the operating and threshold voltages thereby maintaining a stable resistance in the feedback circuit. 11 figs.

O`Connor, P.

1998-08-11T23:59:59.000Z

216

Uncertainty of Concentration–Terrestrial Carbon Feedback in Earth System Models  

Science Journals Connector (OSTI)

Carbon uptake by land and ocean as a biogeochemical response to increasing atmospheric CO2 concentration is called concentration–carbon feedback and is one of the carbon cycle feedbacks of the global climate. This feedback can have a major impact ...

Tomohiro Hajima; Kaoru Tachiiri; Akihiko Ito; Michio Kawamiya

2014-05-01T23:59:59.000Z

217

Nested Velocity Feedback Control -1 Presented at CS 2007 Dr Richard Mitchell 2007  

E-Print Network (OSTI)

Nested Velocity Feedback Control - 1 Presented at CS 2007 © Dr Richard Mitchell 2007 Nested tolerant to changes in the plant under control #12;Nested Velocity Feedback Control - 2 Presented at CS path #12;Nested Velocity Feedback Control - 3 Presented at CS 2007 © Dr Richard Mitchell 2007 Cherry

Mitchell, Richard

218

1. Introduction The atmospheric greenhouse effect is the basic mechanism  

E-Print Network (OSTI)

1. Introduction The atmospheric greenhouse effect is the basic mechanism whereby absorbed solar system of the Earth is endowed with a moderately strong greenhouse effect that is characterized by non CO2. There is a strong feedback contribution to the greenhouse effect by water vapor and clouds

219

Quasar feedback: accelerated star formation and chaotic accretion  

E-Print Network (OSTI)

Growing Supermassive Black Holes (SMBH) are believed to influence their parent galaxies in a negative way, terminating their growth by ejecting gas out before it could turn into stars. Here we present some of the most sophisticated SMBH feedback simulations to date showing that quasar's effects on galaxies are not always negative. We find that when the ambient shocked gas cools rapidly, the shocked gas is compressed into thin cold dense shells, filaments and clumps. Driving these high density features out is much more difficult than analytical models predict since dense filaments are resilient to the feedback. However, in this regime quasars have another way of affecting the host -- by triggering a massive star formation burst in the cold gas by over-pressurising it. Under these conditions SMBHs actually accelerate star formation in the host, having a positive rather than negative effect on their host galaxies. The relationship between SMBH and galaxies is thus even more complex and symbiotic than currently b...

Nayakshin, Sergei

2012-01-01T23:59:59.000Z

220

Modeling feedback from stars and black holes in galaxy mergers  

E-Print Network (OSTI)

We describe techniques for incorporating feedback from star formation and black hole accretion into simulations of isolated and merging galaxies. At present, the details of these processes cannot be resolved in simulations on galactic scales. Our basic approach therefore involves forming coarse-grained representations of the properties of the interstellar medium and black hole accretion starting from basic physical assumptions, so that the impact of these effects can be included on resolved scales. We illustrate our method using a multiphase description of star-forming gas. Feedback from star formation pressurises highly overdense gas, altering its effective equation of state. We show that this allows the construction of stable galaxy models with much larger gas fractions than possible in earlier numerical work. We extend the model by including a treatment of gas accretion onto central supermassive black holes in galaxies. Assuming thermal coupling of a small fraction of the bolometric luminosity of accreting...

Springel, V; Hernquist, L; Springel, Volker; Matteo, Tiziana Di; Hernquist, Lars

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Experimental feedback control of quantum systems using weak measurements  

E-Print Network (OSTI)

A goal of the emerging field of quantum control is to develop methods for quantum technologies to function robustly in the presence of noise. Central issues are the fundamental limitations on the available information about quantum systems and the disturbance they suffer in the process of measurement. In the context of a simple quantum control scenario--the stabilization of non-orthogonal states of a qubit against dephasing--we experimentally explore the use of weak measurements in feedback control. We find that, despite the intrinsic difficultly of implementing them, weak measurements allow us to control the qubit better in practice than is even theoretically possible without them. Our work shows that these more general quantum measurements can play an important role for feedback control of quantum systems.

G. G. Gillett; R. B. Dalton; B. P. Lanyon; M. P. Almeida; M. Barbieri; G. J. Pryde; J. L. O'Brien; K. J. Resch; S. D. Bartlett; A. G. White

2010-03-01T23:59:59.000Z

222

The Circadian Rhythm, A Continuous Transcription-Translation Feedback Loop,  

NLE Websites -- All DOE Office Websites (Extended Search)

Circadian Rhythm, A Continuous Transcription-Translation Feedback Loop, Circadian Rhythm, A Continuous Transcription-Translation Feedback Loop, Contributes to Low-Dose Radiation-Induced Radioadaptive Response Aris Alexandrou University of California Davis Abstract The initiation of the circadian rhythm field occurred when the Takahashi group defined a mutation in the mouse gene “Clock” and cloned the circadian locomotor output cycles kaput (Clock) in the mid-1990’s (1-3). Currently more than a dozen clock genes have been identified (3-4). Disruptions in the circadian rhythm via changes in environmental conditions, such as, diet, temperature, and night/day hours lead to the pathogenesis of a multitude of diseases, such as, cancer, diabetes mellitus, neurological diseases, and sleep disorders. A disruption in the

223

Feedback and sensitivity in an electrical circuit: An analog for climate models  

SciTech Connect

Earth's climate sensitivity is often interpreted in terms of feedbacks that can alter the sensitivity from that of a no-feedback Stefan-Boltzmann radiator, with the feedback concept and algebra introduced by analogy to the use of this concept in the electronics literature. This analogy is quite valuable in interpreting the sensitivity of the climate system, but usage of this algebra and terminology in the climate literature is often inconsistent, with resultant potential for confusion and loss of physical insight. Here a simple and readily understood electrical resistance circuit is examined in terms of feedback theory to introduce and define the terminology that is used to quantify feedbacks. This formalism is applied to the feedbacks in an energy-balance model of Earth's climate and used to interpret the magnitude of feedback in the climate system that corresponds to present estimates of Earth's climate sensitivity.

Schwartz, S.E.

2010-07-27T23:59:59.000Z

224

Reputation, Trust, & Rebates: How Online Markets Can Improve Their Feedback Mechanisms  

E-Print Network (OSTI)

? B }. 2. The seller chooses to rebate r or not, where r >seller’s actions set is {Rebate(R S ), N oRebate(N R S )}.Reputation, Trust, and Rebates: How Online Auction Markets

Li, Lingfang Ivy

2006-01-01T23:59:59.000Z

225

A mechanical-biochemical feedback loop regulates remodeling in the actin cytoskeleton  

Science Journals Connector (OSTI)

...of cells were mounted in a Ludin Chamber (Life Imaging Services) and changed to low phenol red and low riboflavin imaging media DMEM/F12 (Invitrogen) supplemented with 10% FBS and Hepes buffer. Cells were maintained at 37 °C using a Ludin Cube...

Matthew R. Stachowiak; Mark A. Smith; Elizabeth Blankman; Laura M. Chapin; Hayri E. Balcioglu; Shuyuan Wang; Mary C. Beckerle; Ben O'Shaughnessy

2014-01-01T23:59:59.000Z

226

Implementation of mechanical, electrical, and feedback control systems in unmanned aerial vehicles  

E-Print Network (OSTI)

The thesis objective was to design an unmanned aerial vehicle that was capable of stable, autonomous flight. A fixed wing aircraft was chosen to simplify some of the flight characteristics and avoid some of the challenges ...

Tan, Derrick (Derrick Chi-Ho)

2006-01-01T23:59:59.000Z

227

Single electron beam rf feedback free electron laser  

DOE Patents (OSTI)

A free electron laser system and electron beam system for a free electron laser which uses rf feedback to enhance efficiency are described. Rf energy is extracted from a single electron beam by decelerating cavities and energy is returned to accelerating cavities using rf returns, such as rf waveguides, rf feedthroughs, resonant feedthroughs, etc. This rf energy is added to rf klystron energy to reduce the required input energy and thereby enhance energy efficiency of the system.

Brau, C.A.; Stein, W.E.; Rockwood, S.D.

1981-02-11T23:59:59.000Z

228

Employee Participation Through High Standards and Information Feedback  

E-Print Network (OSTI)

I EMPLOYEE PARTICIPATION THROUGH HIGH STANDARDS AND INFORMATION FEEDBACK Marvin Weisenthal Good Impressions, Inc. Troy, Michigan The energy problem is only too alive, and un fortunately waiting for the next crisis to raise its... in energy usage. Most people lack enthusiasm for taking an ac tive part in eliminating energy waste because there isn't a system set up that would be meaning ful to them. A meaningful system would give a set of high standards, requirements...

Weisenthal, M.

229

Synthesis of linear quantum stochastic systems via quantum feedback networks  

E-Print Network (OSTI)

Recent theoretical and experimental investigations of coherent feedback control, the feedback control of a quantum system with another quantum system, has raised the important problem of how to synthesize a class of quantum systems, called the class of linear quantum stochastic systems, from basic quantum optical components and devices in a systematic way. The synthesis theory sought in this case can be naturally viewed as a quantum analogue of linear electrical network synthesis theory and as such has potential for applications beyond the realization of coherent feedback controllers. In earlier work, Nurdin, James and Doherty have established that an arbitrary linear quantum stochastic system can be realized as a cascade connection of simpler one degree of freedom quantum harmonic oscillators, together with a direct interaction Hamiltonian which is bilinear in the canonical operators of the oscillators. However, from an experimental perspective and based on current methods and technologies, direct interaction Hamiltonians are challenging to implement for systems with more than just a few degrees of freedom. In order to facilitate more tractable physical realizations of these systems, this paper develops a new synthesis algorithm for linear quantum stochastic systems that relies solely on field-mediated interactions, including in implementation of the direct interaction Hamiltonian. Explicit synthesis examples are provided to illustrate the realization of two degrees of freedom linear quantum stochastic systems using the new algorithm.

H. I. Nurdin

2009-05-06T23:59:59.000Z

230

The Impact of Galactic Feedback on the Circumgalactic Medium  

E-Print Network (OSTI)

Galactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring a range of parameters based on the galaxy formation model developed in Vogelsberger et al. 2013 (henceforth V13). We examine the effects of AGN feedback, wind mass loading, wind specific energy, and wind metal-loading on the properties of the circumgalactic medium (CGM) of galaxies with $M_\\text{halo} > 10^{11} M_\\odot$. Note that while the V13 model was tuned to match observations including the stellar mass function, no explicit tuning was done for the CGM. The wind energy per unit outflow mass has the most significant effect on the CGM enrichment. High energy winds launch metals far beyond the virial radius. AGN feedback also has a significant effect, but only at $z < 3$. We compare to high redshift HI and CIV observations. All our simulations produce the observed number of Damped Lyman-$\\alpha$ Absorbers. At lower column densi...

Suresh, Joshua; Vogelsberger, Mark; Genel, Shy; Torrey, Paul; Sijacki, Debora; Springel, Volker; Hernquist, Lars

2015-01-01T23:59:59.000Z

231

Smart panels with SISO or MIMO velocity feedback control systems  

Science Journals Connector (OSTI)

This paper summarizes and contrasts the research work that has been carried out on two types of smart panels with ASAC control systems: first a SISO velocity feedback control system with a sensor that detects the volumetric component of the vibration of the panel and an actuator that exerts a uniform force over the surface of the panel and second a MIMO decentralized feedback control system using a grid of sensors that measure the point velocities of the panel and a grid of actuators that generates point excitations in the locations of the sensors. Both theoretical predictions and experimental results are presented for a reference problem of control of sound radiation by a rectangular panel clamped along the perimeter. The simulations carried out for the two systems have shown that the smart panel with the volume velocity sensor and uniform force actuator can in principle give better control performance than the smart panel with the sixteen decentralized control units. However the practical implementation of the smart panel with the volume velocity sensor and uniform force actuator is limited by stability problems which are instead a minor issue for the panel with 16 decentralized velocity feedback control units.

2003-01-01T23:59:59.000Z

232

Star Formation in Disk Galaxies. III. Does stellar feedback result in cloud death?  

E-Print Network (OSTI)

Stellar feedback, star formation and gravitational interactions are major controlling forces in the evolution of Giant Molecular Clouds (GMCs). To explore their relative roles, we examine the properties and evolution of GMCs forming in an isolated galactic disk simulation that includes both localised thermal feedback and photoelectric heating. The results are compared with the three previous simulations in this series which consists of a model with no star formation, star formation but no form of feedback and star formation with photoelectric heating in a set with steadily increasing physical effects. We find that the addition of localised thermal feedback greatly suppresses star formation but does not destroy the surrounding GMC, giving cloud properties closely resembling the run in which no stellar physics is included. The outflows from the feedback reduce the mass of the cloud but do not destroy it, allowing the cloud to survive its stellar children. This suggests that weak thermal feedback such as the low...

Tasker, Elizabeth J; Pudritz, Ralph

2015-01-01T23:59:59.000Z

233

Analyzing Vehicle Fuel Saving Opportunities through Intelligent Driver Feedback  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

NREL/CP-5400-53864.Posted with permission. NREL/CP-5400-53864.Posted with permission. Presented at the 2012 SAE World Congress, 24-26 April 2012, Detroit, Michigan 2012-01-0494 Analyzing Vehicle Fuel Saving Opportunities Published through Intelligent Driver Feedback 04/16/2012 Jeffrey Gonder, Matthew Earleywine and Witt Sparks National Renewable Energy Laboratory doi:10.4271/2012-01-0494 ABSTRACT While it is well known that "MPG will vary" based on how one drives, little independent research exists on the aggregate

234

Optimal feedback in efficient single-cavity optical parametric oscillators  

SciTech Connect

An approach based on the description of competition of quadratic processes of merging and decomposition of quanta resulting in the formation of cnoidal waves on an effective cascade cubic Kerr-type nonlinearity is used to optimise the scheme of a single-cavity optical parametric oscillator. It is shown that the use of a feedback circuit (cavity) decreases the period of cnoidal waves produced in a nonlinear crystal, while the optimisation procedure of the transfer constant of this circuit (reflectivity of the output mirror of the cavity) is reduced to matching this period with the nonlinear crystal length. (optical parametric oscillators)

Petnikova, V M; Shuvalov, Vladimir V [International Laser Center, M. V. Lomonosov Moscow State University, Moscow (Russian Federation)

2010-09-10T23:59:59.000Z

235

Closed orbit related problems: Correction, feedback, and analysis  

SciTech Connect

Orbit correction - moving the orbit to a desired orbit, orbit stability - keeping the orbit on the desired orbit using feedback to filter out unwanted noise, and orbit analysis - to learn more about the model of the machine, are strongly interrelated. They are the three facets of the same problem. The better one knows the model of the machine, the better the predictions that can be made on the behavior of the machine (inverse modeling) and the more accurately one can control the machine. On the other hand, one of the tools to learn more about the machine (modeling) is to study and analyze the orbit response to {open_quotes}kicks.{close_quotes}

Bozoki, E.S.

1995-02-01T23:59:59.000Z

236

Ignition feedback regenerative free electron laser (FEL) amplifier  

DOE Patents (OSTI)

An ignition feedback regenerative amplifier consists of an injector, a linear accelerator with energy recovery, and a high-gain free electron laser amplifier. A fraction of the free electron laser output is coupled to the input to operate the free electron laser in the regenerative mode. A mode filter in this loop prevents run away instability. Another fraction of the output, after suitable frequency up conversion, is used to drive the photocathode. An external laser is provided to start up both the amplifier and the injector, thus igniting the system.

Kim, Kwang-Je (Burr Ridge, IL); Zholents, Alexander (Walnut Creek, CA); Zolotorev, Max (Oakland, CA)

2001-01-01T23:59:59.000Z

237

Mechanical memory  

DOE Patents (OSTI)

A first-in-first-out (FIFO) microelectromechanical memory apparatus (also termed a mechanical memory) is disclosed. The mechanical memory utilizes a plurality of memory cells, with each memory cell having a beam which can be bowed in either of two directions of curvature to indicate two different logic states for that memory cell. The memory cells can be arranged around a wheel which operates as a clocking actuator to serially shift data from one memory cell to the next. The mechanical memory can be formed using conventional surface micromachining, and can be formed as either a nonvolatile memory or as a volatile memory.

Gilkey, Jeffrey C. (Albuquerque, NM); Duesterhaus, Michelle A. (Albuquerque, NM); Peter, Frank J. (Albuquerque, NM); Renn, Rosemarie A. (Albuquerque, NM); Baker, Michael S. (Albuquerque, NM)

2006-05-16T23:59:59.000Z

238

Mechanical memory  

DOE Patents (OSTI)

A first-in-first-out (FIFO) microelectromechanical memory apparatus (also termed a mechanical memory) is disclosed. The mechanical memory utilizes a plurality of memory cells, with each memory cell having a beam which can be bowed in either of two directions of curvature to indicate two different logic states for that memory cell. The memory cells can be arranged around a wheel which operates as a clocking actuator to serially shift data from one memory cell to the next. The mechanical memory can be formed using conventional surface micromachining, and can be formed as either a nonvolatile memory or as a volatile memory.

Gilkey, Jeffrey C. (Albuquerque, NM); Duesterhaus, Michelle A. (Albuquerque, NM); Peter, Frank J. (Albuquerque, NM); Renn, Rosemarie A. (Alburquerque, NM); Baker, Michael S. (Albuquerque, NM)

2006-08-15T23:59:59.000Z

239

Participant/assessor personality characteristics that influence feedback acceptance in developmental assessment centers  

E-Print Network (OSTI)

on Assessor Characteristics I 3 4 . . . . . 8 12 METHOD . . 16 Participants. Assessors Assessment Center Development. Assessor Training. Measurement of Feedback Sign and Magnitude Goldberg's 100 Unipolar Markers. Measurement of Feedback Acceptance... expectations/goals is consistent with goal setting and other feedback sign research (Ilgen et al. , 1979). Goldberg 's /00 Unipolar Markers Goldberg's 100 Unipolar Markers (Goldberg, 1992) is a standard measure of the dimensions of the FFM of personality...

Bell, Suzanne Tamara

2012-06-07T23:59:59.000Z

240

Factors Affecting the Acceptance and Application of Developmental Feedback from an Executive Assessment Program.  

E-Print Network (OSTI)

??Developmental assessment centers are designed to give participants feedback about their behavior relative to success in senior management. In the current study a theoretical model… (more)

Byham, Tacy M.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Surface-emitting red, green, and blue colloidal quantum dot distributed feedback lasers  

Science Journals Connector (OSTI)

We demonstrate surface emitting distributed feedback (DFB) lasers across the red, green, and blue from densely packed colloidal quantum dot (CQD) films. The solid CQD films were...

Roh, Kwangdong; Dang, Cuong; Lee, Joonhee; Chen, Songtao; Steckel, Jonathan S; Coe-Sullivan, Seth; Nurmikko, Arto

2014-01-01T23:59:59.000Z

242

RELATIONSHIP BETWEEN ATTITUDE TOWARDS PEER REVIEW AND QUALITY OF PEER FEEDBACK.  

E-Print Network (OSTI)

??Peer feedback can be a useful assessment tool for teachers, but students may regard it as invaluable or intimidating. Our research explores the relationship between… (more)

Bosboom, R.E.; Goff, M.J.; Haan, R. de

2014-01-01T23:59:59.000Z

243

E-Print Network 3.0 - assessing radiation feedbacks Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

content from the whole quarter Summary: . Overview 2. Solar radiation and the Greenhouse effect 3. Forcings and feedbacks 4. Who's responsible 5... . Overview 2. Solar...

244

E-Print Network 3.0 - analog feedback damper Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

magnetorheological (MR) dampers for semi-active control of structures subject to seismic, wind, Summary: using MR dampers 2-10. Feedback structural control systems can be broadly...

245

Nonlinear feedback effects in coupled boson-fermion systems  

Science Journals Connector (OSTI)

We address ourselves to a class of systems composed of two coupled subsystems without any intrasubsystem interaction: itinerant fermions and localized bosons on a lattice. Switching on an interaction between the two subsystems leads to feedback effects which result in a rich dynamical structure in both of them. Such feedback features are studied on the basis of the flow equation technique—an infinite series of infinitesimal unitary transformations—which leads to a gradual elimination of the intersubsystem interaction. As a result the two subsystems get decoupled but their renormalized kinetic energies become mutually dependent on each other. Choosing for the intersubsystem interaction a charge exchange term,—the boson-fermion model—the initially localized bosons acquire itinerancy through their dependence on the renormalized fermion dispersion. This latter evolves from a free particle dispersion into one showing a pseudogap structure near the chemical potential. Upon lowering the temperature both subsystems simultaneously enter a macroscopic coherent quantum state. The bosons become superfluid, exhibiting a soundwavelike dispersion while the fermions develop a true gap in their dispersion. The essential physical features described by this technique are already contained in the renormalization of the kinetic terms in the respective Hamiltonians of the two subsystems. The extra interaction terms resulting in the process of iteration only strengthen this physics. We compare the results with previous calculations based on self-consistent perturbative approaches.

T. Domanski and J. Ranninger

2001-03-01T23:59:59.000Z

246

Cloud Feedbacks on Climate: A Challenging Scientific Problem  

SciTech Connect

One reason it has been difficult to develop suitable social and economic policies to address global climate change is that projected global warming during the coming century has a large uncertainty range. The primary physical cause of this large uncertainty range is lack of understanding of the magnitude and even sign of cloud feedbacks on the climate system. If Earth's cloudiness responded to global warming by reflecting more solar radiation back to space or allowing more terrestrial radiation to be emitted to space, this would mitigate the warming produced by increased anthropogenic greenhouse gases. Contrastingly, a cloud response that reduced solar reflection or terrestrial emission would exacerbate anthropogenic greenhouse warming. It is likely that a mixture of responses will occur depending on cloud type and meteorological regime, and at present, we do not know what the net effect will be. This presentation will explain why cloud feedbacks have been a challenging scientific problem from the perspective of theory, modeling, and observations. Recent research results on observed multidecadal cloud-atmosphere-ocean variability over the Pacific Ocean will also be shown, along with suggestions for future research.

Norris, Joel (Scripps Institution of Oceanography, UC San Diego) [Scripps Institution of Oceanography, UC San Diego

2010-05-10T23:59:59.000Z

247

Computational mechanics  

SciTech Connect

The Computational Mechanics thrust area sponsors research into the underlying solid, structural and fluid mechanics and heat transfer necessary for the development of state-of-the-art general purpose computational software. The scale of computational capability spans office workstations, departmental computer servers, and Cray-class supercomputers. The DYNA, NIKE, and TOPAZ codes have achieved world fame through our broad collaborators program, in addition to their strong support of on-going Lawrence Livermore National Laboratory (LLNL) programs. Several technology transfer initiatives have been based on these established codes, teaming LLNL analysts and researchers with counterparts in industry, extending code capability to specific industrial interests of casting, metalforming, and automobile crash dynamics. The next-generation solid/structural mechanics code, ParaDyn, is targeted toward massively parallel computers, which will extend performance from gigaflop to teraflop power. Our work for FY-92 is described in the following eight articles: (1) Solution Strategies: New Approaches for Strongly Nonlinear Quasistatic Problems Using DYNA3D; (2) Enhanced Enforcement of Mechanical Contact: The Method of Augmented Lagrangians; (3) ParaDyn: New Generation Solid/Structural Mechanics Codes for Massively Parallel Processors; (4) Composite Damage Modeling; (5) HYDRA: A Parallel/Vector Flow Solver for Three-Dimensional, Transient, Incompressible Viscous How; (6) Development and Testing of the TRIM3D Radiation Heat Transfer Code; (7) A Methodology for Calculating the Seismic Response of Critical Structures; and (8) Reinforced Concrete Damage Modeling.

Goudreau, G.L.

1993-03-01T23:59:59.000Z

248

Design of fast output sampling feedback control for smart structure model  

Science Journals Connector (OSTI)

In this paper, the problem of modelling and output feedback control design for a smart structural system using piezoelectric material as a sensor/actuator is addressed. The model for a smart cantilever beam is developed by the finite element method. ... Keywords: output feedback, smart structure, vibration control

M. Umapathy; B. Bandyopadhyay

2007-01-01T23:59:59.000Z

249

A modelling approach to carbon, water and energy feedbacks and interactions across the  

E-Print Network (OSTI)

i A modelling approach to carbon, water and energy feedbacks and interactions across the land propagates through models and the processes and feedbacks they simulate. One of our jobs as environmental partitioning of energy, the evapotranspiration of water and if the land-surface is a sink or a source of CO2

250

Open-Loop Digital Predistortion Using Cartesian Feedback for Adaptive RF Power Amplifier Linearization  

E-Print Network (OSTI)

leverage analog Cartesian feedback (CFB) to train a Cartesian look-up table, reducing DSP and power the CFB system does not continuously operate, we overcome the bandwidth limitation traditionally is that it is not robust to variations in process, supply voltage, temperature, and aging effects. Cartesian feedback (CFB

Dawson, Joel

251

Feedback Can Increase the CapacityCost Function of Discrete Channels with Memory y  

E-Print Network (OSTI)

bound to the capacity­cost func­ tion with feedback (CFB (fi)). The lower bound to CFB (fi) is then shown numerically to exceed the upper bound to CNFB (fi). An upper bound to CFB (fi) is also obtained and feedback capacity­cost functions -- denoted by CNFB (fi) and CFB (fi) respectively -- in order to deter

Alajaji, Fady

252

Hardware Design and Analysis of Statistical Cipher Feedback Mode Using Serial Transfer  

E-Print Network (OSTI)

to the Ciphertext Queue. SCFB mode is the hybrid of output feedback (OFB) mode and cipher feedback (CFB) mode feeds back ciphertext to the input of the block cipher similar to the conventional CFB mode, except- plementation than conventional CFB mode. An iterative based implementation of the Advanced Encryption Strandard

Heys, Howard

253

Rendering of Environmental Force Feedback in Mobile Robot Teleoperation based on Fuzzy Logic  

E-Print Network (OSTI)

. Remote control of mobile robot with force reflection and fuzzy logic based velocity control was presentedRendering of Environmental Force Feedback in Mobile Robot Teleoperation based on Fuzzy Logic Ildar force feedback in mobile robot teleoperation based on fuzzy logic is presented. To ensure safety

Ryu, Jee-Hwan

254

Interaction frogger: a design framework to couple action and function through feedback and feedforward  

Science Journals Connector (OSTI)

In this paper we present a design framework to analyze person-product interaction. Its focus is on how the user's action and the product's function are coupled through different types of feedback and feedforward: inherent and augmented information. Instead ... Keywords: design framework, feedback, feedforward, interaction models, tangible user interface

S. A. G. Wensveen; J. P. Djajadiningrat; C. J. Overbeeke

2004-08-01T23:59:59.000Z

255

Thermal instability and the feedback regulation of hot haloes in clusters, groups and galaxies  

Science Journals Connector (OSTI)

......research-article Papers Thermal instability and the feedback...fluid velocity, p is the thermal pressure, e=p...We use a third of the solar metallicity, corresponding...required to maintain thermal equilibrium in the core...strong feedback and can overheat the ICM, as we discuss......

Prateek Sharma; Michael McCourt; Eliot Quataert; Ian J. Parrish

2012-03-11T23:59:59.000Z

256

Toward Harnessing User Feedback For Machine Learning Simone Stumpf, Vidya Rajaram, Lida Li, Margaret Burnett,  

E-Print Network (OSTI)

Toward Harnessing User Feedback For Machine Learning Simone Stumpf, Vidya Rajaram, Lida Li University School of Electrical Engineering and Computer Science Corvallis, OR 97331 USA 1 to the learning algorithm. The results show that user feedback has the potential to significantly improve machine

257

Interannual ENSO variability forced through coupled atmosphere-ocean feedback loops  

E-Print Network (OSTI)

, 2000; Power and Colman, 2006]. In this paper, we explore the extent to which baroclinic ocean Rossby1 Interannual ENSO variability forced through coupled atmosphere-ocean feedback loops Amy Solomon 1 feedback to, and significantly impact, the Tropics through ocean Rossby waves. We use an atmospheric

Solomon, Amy

258

Simulated Arctic atmospheric feedbacks associated with late summer sea ice anomalies  

E-Print Network (OSTI)

Simulated Arctic atmospheric feedbacks associated with late summer sea ice anomalies A. Rinke,1,2 K depend on regional and decadal variations in the coupled atmosphere-ocean-sea ice system. Citation: Rinke to investigate feedbacks between September sea ice anomalies in the Arctic and atmospheric conditions in autumn

Moore, John

259

Expansion of the world's deserts due to global warming and vegetation-albedo feedback  

E-Print Network (OSTI)

-2 in surface absorbed solar energy. Although acting on regional scale, such a large negative simulation where the vegetation-albedo feedback was allowed to influence the atmospheric energy balance-14). Vegetation feedback has also been shown to be of key importance in the drying of North Africa during

Zeng, Ning

260

On the link between Hadley circulation changes and radiative feedback processes  

E-Print Network (OSTI)

On the link between Hadley circulation changes and radiative feedback processes Masakazu Yoshimori1 and changes in the Hadley circulation accompany interhemispherically asymmetric surface temperature changes transport and Hadley circulation change. On the other hand, cloud feedback plays a relatively minor role

Broccoli, Anthony J.

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Mechanical Vibration  

Science Journals Connector (OSTI)

... THE suppression and control of mechanical vibration have assumed great importance in engineering. One consequence of this is that the number ... degree of emphasis is placed on transient oscillation (in addition to steady-State and free vibration). The treatment of this topic is based mainly on phase-plane constructions and it ...

R. E. D. BISHOP

1958-12-06T23:59:59.000Z

262

Microsoft Word - Feedback_Form_July_20031.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

BROOKHAVEN ADVOCACY COUNCIL BROOKHAVEN ADVOCACY COUNCIL Employee/Guest/User Feedback Form The Brookhaven Advocacy Council (BAC) advises and makes recommendations to the Laboratory Director on the resolution of employee, guest and user concerns or issues that are brought to the attention of the Council. The Council functions independently of the Human Resources Division, reporting directly to the Laboratory Director. One of the Council's primary objectives is to improve the quality of life at BNL for all employees, guests and users. To that end, the Council invites you to share your experiences at BNL. Any information you provide is considered strictly confidential. You should feel free to contact any one of the Council members listed below for a one-on-one discussion, or if you prefer, complete the brief

263

Feedback regulated induction heater for a flowing fluid  

DOE Patents (OSTI)

A regulated induction heater for heating a stream of flowing fluid to a predetermined desired temperature. The heater includes a radiofrequency induction coil which surrounds a glass tube through which the fluid flows. A heating element consisting of a bundle of approximately 200 stainless steel capillary tubes located within the glass tube couples the output of the induction coil to the fluid. The temperature of the fluid downstream from the heating element is sensed with a platinum resistance thermometer, the output of which is applied to an adjustable porportional and integral feedback control circuit which regulates the power applied to the induction coil. The heater regulates the fluid temperature to within 0.005/sup 0/C at a flow rate of 50 cm/sup 3//sec with a response time of less than 0.1 second, and can accommodate changes in heat load up to 1500 watts.

Migliori, A.; Swift, G.W.

1984-06-13T23:59:59.000Z

264

Feedback regulated induction heater for a flowing fluid  

DOE Patents (OSTI)

A regulated induction heater for heating a stream of flowing fluid to a predetermined desired temperature. The heater includes a radiofrequency induction coil which surrounds a glass tube through which the fluid flows. A heating element consisting of a bundle of approximately 200 stainless steel capillary tubes located within the glass tube couples the output of the induction coil to the fluid. The temperature of the fluid downstream from the heating element is sensed with a platinum resistance thermometer, the output of which is applied to an adjustable proportional and integral feedback control circuit which regulates the power applied to the induction coil. The heater regulates the fluid temperature to within 0.005.degree. C. at a flow rate of 50 cm.sup.3 /second with a response time of less than 0.1 second, and can accommodate changes in heat load up to 1500 watts.

Migliori, Albert (Santa Fe, NM); Swift, Gregory W. (Los Alamos, NM)

1985-01-01T23:59:59.000Z

265

Photo-heating and supernova feedback amplify each other's effect on the cosmic star formation rate  

E-Print Network (OSTI)

Photo-heating associated with reionisation and kinetic feedback from core-collapse supernovae have previously been shown to suppress the high-redshift cosmic star formation rate. Here we investigate the interplay between photo-heating and supernova feedback using a set of cosmological, smoothed particle hydrodynamics simulations. We show that photo-heating and supernova feedback mutually amplify each other's ability to suppress the star formation rate. Our results demonstrate the importance of the simultaneous, non-independent inclusion of these two processes in models of galaxy formation to estimate the strength of the total negative feedback they exert. They may therefore be of particular relevance to semi-analytic models in which the effects of photo-heating and supernova feedback are implicitly assumed to act independently of each other.

Andreas H. Pawlik; Joop Schaye

2008-12-15T23:59:59.000Z

266

Online game-generated feedback as a way to support early algebraic reasoning  

Science Journals Connector (OSTI)

This study explores the potential of game-generated feedback to support primary school students' problem solving processes in non-routine contextual number problems with interrelated values. The students were invited to play an online game at home that was extended with some additional problems. A paper-and-pencil test was used as a pre and posttest and special software monitored the online computer activity. The data analysis showed that game-generated feedback supported students in detecting and correcting their errors. The students were more successful in problem solving in the online game than in the paper-and-pencil condition where no feedback was available. Another result was that the students performed better in the posttest than in the pretest and verified their answers more often. This last finding suggests that game-generated feedback stimulated student-generated feedback.

Angeliki Kolovou; Marja Van Den Heuvel-Panhuizen

2010-01-01T23:59:59.000Z

267

Operating nuclear plant feedback to ASME and French codes  

SciTech Connect

The French have an advantage in nuclear plant operating experience feedback due to the highly centralized nature of their nuclear industry. There is only one utility in charge of design as well as operations (EDF) and only one reactor vendor (Framatome). The ASME Code has played a key role in resolving technical issues in the design and operation of nuclear plants since the inception of nuclear power. The committee structure of the Code brings an ideal combination of senior technical people with both broad and specialized experience to bear on complex how safe is safe enough technical issues. The authors now see an even greater role for the ASME Code in a proposed new regulatory era for the US nuclear industry. The current legalistic confrontational regulatory era has been quite destructive. There now appears to be a real opportunity to begin a new era of technical consensus as the primary means for resolving safety issues. This change can quickly be brought about by having the industry take operating plant problems and regulatory technical issues directly to the ASME Code for timely resolution. Surprisingly, there is no institution in the US nuclear industry with such a mandate. In fact, the industry is organized to feedback through the Nuclear Regulatory Commission issues which could be far better resolved through the ASME Code. Major regulatory benefits can be achieved by closing this loop and providing systematic interaction with the ASME Code. The essential elements of a new regulatory era and ideas for organizing US institutional industry responsibilities, taken from the French experience, are described in this paper.

Journet, J. [Electricite de France, Clamart (France); O`Donnell, W.J. [O`Donnell Consulting Engineers, Bethel Park, PA (United States)

1996-12-01T23:59:59.000Z

268

Radiative and Dynamical Feedbacks Over the Equatorial Cold-Tongue: Results from Seven Atmospheric GCMs  

SciTech Connect

The equatorial Pacific is a region with strong negative feedbacks. Yet coupled GCMs have exhibited a propensity to develop a significant SST bias in that region, suggesting an unrealistic sensitivity in the coupled models to small energy flux errors that inevitably occur in the individual model components. Could this 'hypersensitivity' exhibited in a coupled model be due to an underestimate of the strength of the negative feedbacks in this region? With this suspicion, the feedbacks in the equatorial Pacific in seven atmospheric GCMs (AGCMs) have been quantified using the interannual variations in that region and compared with the corresponding calculations from the observations. The seven AGCMs are: the NCAR CAM1, the NCAR CAM2,the NCAR CAM3, the NASA/NSIPP Atmospheric Model, the Hadley Center Model, the GFDL AM2p10, and the GFDL AM2p12. All the corresponding coupled runs of these seven AGCMs have an excessive cold-tongue in the equatorial Pacific. The net atmospheric feedback over the equatorial Pacific in the two GFDL models is found to be comparable to the observed value. All other models are found to have a weaker negative net feedback from the atmosphere--a weaker regulating effect on the underlying SST than the real atmosphere. A weaker negative feedback from the cloud albedo and a weaker negative feedback from the atmospheric transport are the two leading contributors to the weaker regulating effect from the model atmosphere. All models overestimate somewhat the positive feedback from water vapor. These results confirm the suspicion that an underestimate of negative feedbacks from the atmosphere over the equatorial Pacific region is a prevalent problem. The results also suggest, however, that a weaker regulatory effect from the atmosphere is unlikely solely responsible for the 'hypersensitivity' in all models. The need to validate the feedbacks from the ocean transport is therefore highlighted.

Sun, D; Zhang, T; Covey, C; Klein, S; Collins, W; Kiehl, J; Meehl, J; Held, I; Suarez, M

2005-01-04T23:59:59.000Z

269

Iterative Dense Correspondence Correction Through Bundle Adjustment Feedback-Based Error Detection  

SciTech Connect

A novel method to detect and correct inaccuracies in a set of unconstrained dense correspondences between two images is presented. Starting with a robust, general-purpose dense correspondence algorithm, an initial pose estimate and dense 3D scene reconstruction are obtained and bundle-adjusted. Reprojection errors are then computed for each correspondence pair, which is used as a metric to distinguish high and low-error correspondences. An affine neighborhood-based coarse-to-fine iterative search algorithm is then applied only on the high-error correspondences to correct their positions. Such an error detection and correction mechanism is novel for unconstrained dense correspondences, for example not obtained through epipolar geometry-based guided matching. Results indicate that correspondences in regions with issues such as occlusions, repetitive patterns and moving objects can be identified and corrected, such that a more accurate set of dense correspondences results from the feedback-based process, as proven by more accurate pose and structure estimates.

Hess-Flores, M A; Duchaineau, M A; Goldman, M J; Joy, K I

2009-11-23T23:59:59.000Z

270

A quantum cascade laser-based optical feedback cavity-enhanced absorption spectrometer for the simultaneous measurement of CH4 and N2O in air  

Science Journals Connector (OSTI)

Optical feedback cavity-enhanced absorption spectroscopy (OF CEAS) has been demonstrated with a thermoelectrically cooled continuous wave distributed feedback quantum cascade laser (QCL) operating at wavelengths ...

D. J. Hamilton; A. J. Orr-Ewing

2011-03-01T23:59:59.000Z

271

The Case for Feedback Control RealTime Scheduling John A. Stankovic, Chenyang Lu, Sang H. Son and Gang Tao*  

E-Print Network (OSTI)

The Case for Feedback Control Real­Time Scheduling John A. Stankovic, Chenyang Lu, Sang H. Son dynamic systems. In this paper, we present a new scheduling paradigm, which we call feedback control real­time scheduling. Feedback control real­time scheduling defines error terms for schedules, monitors the error

Son, Sang H.

272

ISIT 2003, Yokohama, Japan, June 29 July 4, 2003 Delayed Feedback Capacity of Finite-State Machine Channels  

E-Print Network (OSTI)

of a finite-state machine channel is Cfb = sup P I(X Y ), (2) where the supremum is over the Markov source, the delayed feedback capacity Cfb equals to the non-delayed feedback capacity ~Cfb of the channel ( ~Xt, ~St programming algo- rithms [1]. Let C be the channel capacity without feedback, then C = lim Cfb and C

Kavcic, Aleksandar

273

Carbon sequestration in peatland: patterns and mechanisms of response to climate change  

E-Print Network (OSTI)

Carbon sequestration in peatland: patterns and mechanisms of response to climate change L I S A R., 2000; Turunen et al., 2002; Kremenetski et al., 2003). Rates of carbon (C) sequestration (i.e., uptake in the climatic water budget is crucial to predicting potential feedbacks on the global carbon (C) cycle. To gain

274

Feedback control of torsion balance in measurement of gravitational constant G with angular acceleration method  

SciTech Connect

The performance of the feedback control system is of central importance in the measurement of the Newton's gravitational constant G with angular acceleration method. In this paper, a PID (Proportion-Integration-Differentiation) feedback loop is discussed in detail. Experimental results show that, with the feedback control activated, the twist angle of the torsion balance is limited to 7.3×10{sup ?7} rad /?( Hz ) at the signal frequency of 2?mHz, which contributes a 0.4 ppm uncertainty to the G value.

Quan, Li-Di [MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China) [MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Xue, Chao; Shao, Cheng-Gang; Yang, Shan-Qing; Tu, Liang-Cheng; Luo, Jun, E-mail: junluo@mail.hust.edu.cn [MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China)] [MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Wang, Yong-Ji [School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China)] [School of Automation, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China)

2014-01-15T23:59:59.000Z

275

Feedback Configuration Tools for LHC Low Level RF  

SciTech Connect

The LHC Low Level RF System (LLRF) is a complex multi-VME crate system which is used to regulate the superconductive cavity gap voltage as well as to lower the impedance as seen by the beam through low latency feedback. This system contains multiple loops with several parameters to be set before the loops can be closed. In this paper, we present a suite of MATLAB based tools developed to perform the preliminary alignment of the RF stations and the beginnings of a closed loop model based alignment routine. We briefly introduce the RF system and in particular the base band (time domain noise based) network analyzer system built into the LHC LLRF. The main focus of this paper is the methodology of the algorithms used by the routines within the context of the overall system. Measured results are presented that validate the technique. Because the RF systems are located in a cavern 120 m underground in a location which is relatively un-accessible without beam and completely un-accessible with beam present or magnets are energized, these remotely operated tools are a necessity for the CERN LLRF team to maintain and tune their LLRF systems in a similar fashion as to what was done very successfully in PEP-II at SLAC.

Van Winkle, D.; Fox, J.; Mastorides, T.; Rivetta, C.; /SLAC; Baudrenghien, P.; Butterworth, A.; Molendijk, J.; /CERN

2009-12-16T23:59:59.000Z

276

Analyzing Vehicle Fuel Saving Opportunities through Intelligent Driver Feedback  

SciTech Connect

Driving style changes, e.g., improving driver efficiency and motivating driver behavior changes, could deliver significant petroleum savings. This project examines eliminating stop-and-go driving and unnecessary idling, and also adjusting acceleration rates and cruising speeds to ideal levels to quantify fuel savings. Such extreme adjustments can result in dramatic fuel savings of over 30%, but would in reality only be achievable through automated control of vehicles and traffic flow. In real-world driving, efficient driving behaviors could reduce fuel use by 20% on aggressively driven cycles and by 5-10% on more moderately driven trips. A literature survey was conducted of driver behavior influences, and pertinent factors from on-road experiments with different driving styles were observed. This effort highlighted important driver influences such as surrounding vehicle behavior, anxiety over trying to get somewhere quickly, and the power/torque available from the vehicle. Existing feedback approaches often deliver efficiency information and instruction. Three recommendations for maximizing fuel savings from potential drive cycle improvement are: (1) leveraging applications with enhanced incentives, (2) using an approach that is easy and widely deployable to motivate drivers, and (3) utilizing connected vehicle and automation technologies to achieve large and widespread efficiency improvements.

Gonder, J.; Earleywine, M.; Sparks, W.

2012-06-01T23:59:59.000Z

277

Creating Adaptive Feedback designed for Improving Data Entry Accuracy  

E-Print Network (OSTI)

Abstract- Data quality is a critical problem in modern databases. Data-entry forms present the first and arguably best opportunity for detecting and mitigating errors, but there has been little research into automatic methods for improving data quality at entry time. In this paper, we propose USHER, an end-to-end system for form design, entry, and data quality assurance. Using previous form submissions, USHER learns a probabilistic model over the questions of the form. USHER then applies this model at every step of the data-entry process to improve data quality. Before entry, it induces a form layout that captures the most important data values of a form instance as quickly as possible and reduces the complexity of error-prone questions. During entry, it dynamically adapts the form to the values being entered by providing real-time interface feedback, reasking questions with dubious responses, and simplifying questions by reformulating them. After entry, it revisits question responses that it deems likely to have been entered incorrectly by reasking the question or a reformulation thereof. We evaluate these components of USHER using two real-world data sets. Our results demonstrate that USHER can improve data quality considerably at a reduced cost when compared to current practice. Index Terms- Data quality, data entry, form design, adaptive form. O I.

P. Jaya Prakash; B. Venkateswarlu; S. Abdul Jeelan; Assistant Professors; Andhra Pradesh-india

278

Mechanical squeezing via parametric amplification and weak measurement  

E-Print Network (OSTI)

Nonlinear forces allow motion of a mechanical oscillator to be squeezed below the zero-point motion. Of existing methods, mechanical parametric amplification is relatively accessible, but previously thought to be limited to 3dB of squeezing in the steady state. We consider the effect of applying continuous weak measurement and feedback to this system. If the parametric drive is optimally detuned from resonance, correlations between the quadratures of motion allow unlimited steady-state squeezing. Compared to back-action evasion, we demonstrate that the measurement strength, temperature and efficiency requirements for quantum squeezing are significantly relaxed.

Alex Szorkovszky; Andrew C. Doherty; Glen I. Harris; Warwick P. Bowen

2011-09-30T23:59:59.000Z

279

Mechanical & Aerospace Engineering  

E-Print Network (OSTI)

Mechanical & Aerospace Engineering An experimental methodology is presented for mechanism verification of physics-based prognosis of mechanical damage, such as fatigue. The proposed experimental methodology includes multi-resolution in-situ mechanical testing, advanced imaging analysis, and mechanism

280

Vehicle Technologies Office Merit Review 2014: Look-Ahead Driver Feedback and Powertrain Management  

Energy.gov (U.S. Department of Energy (DOE))

Presentation given by Eaton at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about look-ahead driver feedback and...

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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281

Performing temperature feedback controlled tissue photo-coagulation using magnetic resonance thermometry  

E-Print Network (OSTI)

depth observed (lesion size) was measured. The results obtained show that the temperature feedback controlled system developed has the ability to control the temperature at a desired point within the tissue non-invasively and for the desired time length...

Sampath, Smita

2012-06-07T23:59:59.000Z

282

Building America Expert Meeting: Summary for Diagnostic and Performance Feedback for Residential Space Conditioning System Equipment  

Energy.gov (U.S. Department of Energy (DOE))

The Building Science Consortium held an Expert Meeting on Diagnostic and Performance Feedback for Residential Space Conditioning System Equipment on April 26,l 2010 on the NIST campus in Gaithersburg, Maryland.

283

Permafrost degradation and methane: low risk of biogeochemical climate-warming feedback  

E-Print Network (OSTI)

Climate change and permafrost thaw have been suggested to increase high latitude methane emissions that could potentially represent a strong feedback to the climate system. Using an integrated earth-system model framework, ...

Gao, Xiang

284

A Model of Stuttering and the Production of Speech under Delayed Auditory Feedback Conditions  

Science Journals Connector (OSTI)

The models of stuttering and speech produced under delayed auditory feedback...future units of the rhythmic structure (i.e. stressed syllable in English) will be perceived (Shields, McHugh and Martin, 1974). The ...

Jonathan Harrington

1987-01-01T23:59:59.000Z

285

Dynamic feedback linearization applied to asymptotic tracking: generalization about the turbocharged diesel engine outputs choice  

Science Journals Connector (OSTI)

In this paper we apply dynamic feedback linearization to the tracking problem for a turbocharged diesel engine (TDE) equipped with exhaust gas recirculation (EGR) valve and variable geometry turbocharger (VGT). The model used here is the third-order ...

Marcelin Dabo; Nicolas Langlois; Houcine Chafouk

2009-06-01T23:59:59.000Z

286

Web-based feedback system: the life cycle management as continuous maintenance of apartment facility information  

E-Print Network (OSTI)

This research investigates the feasibility of web technology as a means of delivering facility information for better support of facility operations and maintenance. This study proposes a web-based feedback system as a pragmatic solution...

Jeong, Jin Su

2006-10-30T23:59:59.000Z

287

Using Relevance Feedback in Expert Search Craig Macdonald and Iadh Ounis  

E-Print Network (OSTI)

Using Relevance Feedback in Expert Search Craig Macdonald and Iadh Ounis Department of Computing, LNCS 4425, pp. 431­443, 2007. c Springer-Verlag Berlin Heidelberg 2007 #12;432 C. Macdonald and I

Jose, Joemon M.

288

Interannual Biases Induced by Freshwater Flux and Coupled Feedback in the Tropical Pacific  

Science Journals Connector (OSTI)

Freshwater flux (FWF) forcing–induced feedback has not been represented adequately in many coupled ocean–atmosphere models of the tropical Pacific. Previously, various approximations have been made in representing the FWF forcing in climate ...

Rong-Hua Zhang; Guihua Wang; Dake Chen; A. J. Busalacchi; E. C. Hackert

2010-05-01T23:59:59.000Z

289

Complex Feedback Loops of Technoscience, Literature, and Culture: Dynamics of the Complexity Paradigm in Scientific Fiction  

E-Print Network (OSTI)

-evolution with technoscience. These characteristics of scientific fiction help articulate new ontological, ethical, and aesthetic visions for the posthuman. This dissertation ultimately highlights the strong feedback loops of technoscience, literature, and culture, which...

Song, Ho Rim

2012-10-19T23:59:59.000Z

290

Tailoring Feedback to Users’ Actions in a Persuasive Game for Household Electricity Conservation  

Science Journals Connector (OSTI)

Recent work has begun to focus on the use of games as a platform for energy awareness and eco-feedback research. While technical advancements (wireless sensors, fingerprinting) make timely and tailored feedbac...

Luciano Gamberini; Anna Spagnolli…

2012-01-01T23:59:59.000Z

291

Broadband Distributed Feedback Quantum Cascade Laser Array Using a Heterogeneous Cascade  

Science Journals Connector (OSTI)

We demonstrated an array of distributed feedback quantum cascade lasers covering a spectral range of 220cm-1. The variability in threshold current and slope efficiency is explained in...

Diehl, Laurent; Lee, Benjamin G; Zhang, Haifei A; Pflügl, Christian; Belkin, Mikhail; Fisher, Milan; Wittman, Andreas; Faist, Jerome; Capasso, Federico

292

Carbon–Concentration and Carbon–Climate Feedbacks in CMIP5 Earth System Models  

Science Journals Connector (OSTI)

The magnitude and evolution of parameters that characterize feedbacks in the coupled carbon–climate system are compared across nine Earth system models (ESMs). The analysis is based on results from biogeochemically, radiatively, and fully coupled ...

Vivek K. Arora; George J. Boer; Pierre Friedlingstein; Michael Eby; Chris D. Jones; James R. Christian; Gordon Bonan; Laurent Bopp; Victor Brovkin; Patricia Cadule; Tomohiro Hajima; Tatiana Ilyina; Keith Lindsay; Jerry F. Tjiputra; Tongwen Wu

2013-08-01T23:59:59.000Z

293

TCR? Feedback Signals Inhibit the Coupling of Recombinationally Accessible V?14 Segments with DJ? Complexes  

E-Print Network (OSTI)

Ag receptor allelic exclusion is thought to occur through monoallelic initiation and subsequent feedback inhibition of recombinational accessibility. However, our previous analysis of mice containing a V(D)J recombination ...

Jaenisch, Rudolf

294

The 'Problem' with Automation: Inappropriate Feedback and Interaction, not 'Over-Automation'  

Science Journals Connector (OSTI)

12 April 1990 research-article The 'Problem' with Automation: Inappropriate Feedback and Interaction, not 'Over-Automation' D. A. Norman As automation increasingly takes its place in industry, especially high risk industry...

1990-01-01T23:59:59.000Z

295

CLIS-TR-00-01 May 2000 Using Implicit Feedback for User Modeling  

E-Print Network (OSTI)

1 CLIS-TR-00-01 May 2000 Using Implicit Feedback for User Modeling in Internet and Intranet systems select documents based on the characteristics of the document, whereas social filtering systems

Oard, Doug

296

Expansion of the world's deserts due to vegetation-albedo feedback under global warming  

E-Print Network (OSTI)

to a decrease of about 20 W mÃ?2 in surface absorbed solar energy. Although acting on regional scale., 1999]. Vegetation feedback has also been shown to be of key importance in the drying of North Africa

Zeng, Ning

297

Surface-emitting distributed feedback terahertz quantum-cascade phase-locked laser arrays  

E-Print Network (OSTI)

A new approach to achieve high-power, symmetric beam-pattern, single-mode THz emission from metal-metal waveguide quantum-cascade laser is proposed and implemented. Several surface-emitting distributed feedback terahertz ...

Kao, Tsung-Yu

2009-01-01T23:59:59.000Z

298

Profiling Writing-Knowledge: Exploring Peer Review Feedback Beyond Revising and Editing.  

E-Print Network (OSTI)

??In an attempt to forward writing-knowledge research, I explored peer review feedback to profile writing-knowledge. The idea of profiling writing-knowledge is not new to teaching,… (more)

Garcia, Christopher Balajadia

2014-01-01T23:59:59.000Z

299

Neuro-fuzzy control of an MDOF building with a magnetorheological damper using acceleration feedback  

E-Print Network (OSTI)

varying voltage to be applied to MR dampers installed in the buildings. Determination of the voltage signal is based solely on acceleration feedback from the structure being controlled. Effectiveness of the RC is tested through a series of numerical...

Schurter, Kyle Christopher

2000-01-01T23:59:59.000Z

300

May 21, 2011 - Getting Useful Real Time Feedback About Your Program Webinar (text version)  

NLE Websites -- All DOE Office Websites (Extended Search)

1, 2011 - Getting Useful Real Time Feedback About 1, 2011 - Getting Useful Real Time Feedback About Your Program Webinar (text version) Below is the text version of the Webinar titled "Getting Useful Real Time Feedback About Your Program" originally presented on May 21, 2011. (Please note: portions of the transcript below may be incomplete where indicated with an underlined placeholder space. Please refer to the webinar presentation recording and slides for additional information.) Operator: The broadcast is now starting. All attendees are listen only mode. Sargon de Jesus: Good afternoon. My name is Sargon de Jesus and I am with ERG, a contractor supporting the U.S. Department of Energy Better Buildings program. I wanna thank you for joining today's webinar titled "Getting useful real time feedback about your

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

| | | | | | | |Home Register Home Delivery Site Map Archives Print Edition Advertise Feedback Help Newspaper Ads  

E-Print Network (OSTI)

| | | | | | | |Home Register Home Delivery Site Map Archives Print Edition Advertise Feedback Help Caltrans Still Lagging on Water Pollution Abatement Trying to Win the Baby- Gender Lottery? Turn to Science

Grether, Gregory

302

Uncertainties in CMIP5 Climate Projections due to Carbon Cycle Feedbacks  

Science Journals Connector (OSTI)

In the context of phase 5 of the Coupled Model Intercomparison Project, most climate simulations use prescribed atmospheric CO2 concentration and therefore do not interactively include the effect of carbon cycle feedbacks. However, the ...

Pierre Friedlingstein; Malte Meinshausen; Vivek K. Arora; Chris D. Jones; Alessandro Anav; Spencer K. Liddicoat; Reto Knutti

2014-01-01T23:59:59.000Z

303

An investigation of the performance feedback process using a self-appraisal  

E-Print Network (OSTI)

Problems with Supervisory Feedback. Self-Appraisal and Performance Feedback 16 Disadvantages of the self-appraisal 17 The Interactive Approach. The interactive advantage. 19 20 HYPOTHESES. 22 METHOD. 25 Subjects. Performance Task Design... helpful constructive atmosphere along with high levels of employee participation and mutual goal-setting affected satisfaction with the interview, motivation to improve performance and actual performance improvements. A more detailed investigation...

DeGregorio, Marybeth

2012-06-07T23:59:59.000Z

304

Optimal open-loop and feedback control of spacecraft using single gimbal control moment gyroscopes  

E-Print Network (OSTI)

OPTIMAL OPEN-LOOP AND FEEDBACK CONTROL OF SPACECRAFT USING SINGLE GIMBAL CONTROL MOMENT GYROSCOPES A Thesis by Brian Ray Hoelscher Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE December 1992 Major Subject: Aerospace Engineering OPTIMAL OPEN-LOOP AND FEEDBACK CONTROL OF SPACECRAFT USING SINGLE GIMBAL CONTROL MOMENT GYROSCOPES A Thesis by Brian Ray Hoelscher Approved as to style and content by...

Hoelscher, Brian Ray

2012-06-07T23:59:59.000Z

305

An assessment of the measurement equivalence of rating sources in a multisource feedback system  

E-Print Network (OSTI)

(Tornow, 1993b; Funderburg & Levy, 1997). Supporters of 360-degree feedback systems believe that each rating source provides the ratee with unique information (e. g. , Hazucha, Hezlett, & Schneider, 1993), so high levels of agreement between rating... sources are not expected. However, 360-degree feedback systems have been criticized for the low levels of agreement between rating sources, as psychometric theory states that high levels of agreement between ratings 1'rom different raters are needed...

Sheehan, Mary Kathleen

1999-01-01T23:59:59.000Z

306

Terrestrial biogeochemical feedbacks in the climate system: from past to future  

SciTech Connect

The terrestrial biosphere plays a major role in the regulation of atmospheric composition, and hence climate, through multiple interlinked biogeochemical cycles (BGC). Ice-core and other palaeoenvironmental records show a fast response of vegetation cover and exchanges with the atmosphere to past climate change, although the phasing of these responses reflects spatial patterning and complex interactions between individual biospheric feedbacks. Modern observations show a similar responsiveness of terrestrial biogeochemical cycles to anthropogenically-forced climate changes and air pollution, with equally complex feedbacks. For future conditions, although carbon cycle-climate interactions have been a major focus, other BGC feedbacks could be as important in modulating climate changes. The additional radiative forcing from terrestrial BGC feedbacks other than those conventionally attributed to the carbon cycle is in the range of 0.6 to 1.6 Wm{sup -2}; all taken together we estimate a possible maximum of around 3 Wm{sup -2} towards the end of the 21st century. There are large uncertainties associated with these estimates but, given that the majority of BGC feedbacks result in a positive forcing because of the fundamental link between metabolic stimulation and increasing temperature, improved quantification of these feedbacks and their incorporation in earth system models is necessary in order to develop coherent plans to manage ecosystems for climate mitigation.

Arneth, A.; Harrison, S. P.; Zaehle, S.; Tsigaridis, K; Menon, S; Bartlein, P.J.; Feichter, J; Korhola, A; Kulmala, M; O'Donnell, D; Schurgers, G; Sorvari, S; Vesala, T

2010-01-05T23:59:59.000Z

307

The feedback phase instability in the HBT-EP tokamak D.L. Nadle, C. Cates, H. Dahi, M.E. Mauel,  

E-Print Network (OSTI)

The feedback phase instability in the HBT-EP tokamak D.L. Nadle, C. Cates, H. Dahi, M.E. Mauel, D of a performance limiting feedback phase instability in the HBT-EP toka- mak are reported. The phase instability instability limits feedback performance in HBT-EP by decreasing the feedback loop's phase accuracy as gain

Mauel, Michael E.

308

Mechanical and Aerospace Engineering  

E-Print Network (OSTI)

Mechanical and Aerospace Engineering seminar Three Dimensional Traction Force Microscopy with Applications in Cell Mechanics abstract The interactions between biochemical and mechanical signals during-dimensional measurement techniques are needed to investigate the effect of mechanical properties of the substrate

309

Mechanical Engineer Company Description  

E-Print Network (OSTI)

Mechanical Engineer Company Description Control Solutions Inc. is a small, dynamic, and rapidly. Position Description The Mechanical Engineer is responsible for all aspects associated with the mechanical enclosures, brackets, cabling assemblies among others. Systems include mechanisms, sensors, hydraulics, among

Kostic, Milivoje M.

310

MECHANICAL ENGINEERING Ross Schlueter  

E-Print Network (OSTI)

MECHANICAL ENGINEERING Ross Schlueter Engineering Deputy For Mechanical Engineering Russ Wells Mechanical Engineering Department Deputy ELECTRONICS, SOFTWARE & INSTRUMENTATION ENGINEERING Henrik von Der Sen Mechanical Admin. Assist. Joan Wolter Electronics Admin. Assist. Marilyn Wong Division Admin

311

Erasure of Time Delay Signatures in the Output of an Optoelectronic Feedback Laser with Modulated Delays and Chaos Synchronization  

E-Print Network (OSTI)

By studying the autocorrelation function of the optoelectronic feedback semiconductor laser output we establish that the signatures of time delays can be erased in systems incorporating modulated feedback time delays. This property is of importance for the suitability of such laser systems for secure chaos-based communication systems. We also make the first report on chaos synchronization in both unidirectionally and bidirectionally coupled multiple time delay chaotic semiconductor lasers with modulated optoelectronic feedbacks.

E. M. Shahverdiev; K. A. Shore

2009-06-17T23:59:59.000Z

312

ACTIVE FEEDBACK STABILZATION OF THE RESISTIVE WALL MODE ON THE DIII-D DEVICE  

SciTech Connect

A proof of principle magnetic feedback stabilization experiment has been carried out to suppress the resistive wall mode (RWM), a branch of the ideal magnetohydrodynamic (MHD) kink mode under the influence of a stabilizing resistive wall, on the DIII-D tokamak device [Plasma Phys. and Contr. Fusion Research (International Atomic Energy Agency, Vienna, 1986), p. 159]. The RWM was successfully suppressed and the high beta duration above the no wall limit was extended to more than 50 times the resistive wall flux diffusion time. It was observed that the mode structure was well preserved during the time of the feedback application. Several lumped parameter formulations were used to study the feedback process. The observed feedback characteristics are in good qualitative agreement with the analysis. These results provide encouragement to future efforts towards optimizing the RWM feedback methodology in parallel to what has been successfully developed for the n = 0 vertical positional control. Newly developed MHD codes have been extremely useful in guiding the experiments and in providing possible paths for the next step.

M. OKABAYASHI; J. BIALEK; M.S. CHANCE; M.S. CHU; E.D. FREDRICKSON; A.M. GAROFALO; M. GRYAZNEVICH; R.E HATCHER; T.H. JENSEN; L.C. JOHNSON; R.J. LA HAYE; E,A. LAZARUS; M.A. MAKOWSKI; J. MANICKAM; G.A. NAVRATIL; J.T. SCOVILLE; E.J. STRAIT; A.D. TURNBULL; M.L. WALKER

2000-11-01T23:59:59.000Z

313

Spatial homogenization of thermal feedback regions in Monte Carlo reactor calculations  

SciTech Connect

An integrated thermal-hydraulic feedback module has previously been developed for the Monte Carlo transport solver, MC21. The module incorporates a flexible input format that allows the user to describe heat transfer and coolant flow paths within the geometric model at any level of spatial detail desired. The effect that the varying levels of spatial homogenization of thermal regions has on the accuracy of the Monte Carlo simulations is examined in this study. Six thermal feedback mappings are constructed from the same geometric model of the Calvert Cliffs core. The spatial homogenization of the thermal regions is varied, giving each scheme a different level of detail, and the adequacy of the spatial homogenization is determined based on the eigenvalue produced by each Monte Carlo calculation. The purpose of these numerical experiments is to determine the level of detail necessarily to accurately capture the thermal feedback effect on reactivity. Several different core models are considered: axial-flow only, axial and lateral flow, asymmetry due to control rod insertion, and fuel heating (temperature -dependent cross sections). The thermal results generated by the MC21 thermal feedback module are consistent with expectations. Based upon the numerical experiments conducted it is concluded that the amount of spatial detail necessary to accurately capture the feedback effect on reactivity is relatively small. Homogenization at the assembly level for the Calvert Cliffs PWR model results in a similar power defect to that calculated with individual pin-cells modeled as explicit thermal regions. (authors)

Hanna, B. R.; Gill, D. F.; Griesheimer, D. P. [Bertis Atomic Power Laboratory, Bechtel Marine Propulsion Corporation, P.O. Box 79, West Mifflin, PA 15122 (United States)

2012-07-01T23:59:59.000Z

314

The impact of informational feedback on energy consumption—A survey of the experimental evidence  

Science Journals Connector (OSTI)

In theory, In-Home Displays (IHDs) can revolutionize the way utilities communicate information to customers because they can induce changes in customer behavior even when they are not accompanied by a change in electric prices or rebates for purchasing efficient equipment. \\{IHDs\\} provide consumers with direct feedback—real-time information on energy consumption and costs—and turn a once opaque and static electric bill into a transparent, dynamic, and controllable process. However, to what extent do consumers actually respond to the direct feedback provided by IHDs? In this paper, we seek to empirically answer this question by reviewing a dozen utility pilot programs in North America and abroad that focus on the energy conservation impact of IHDs. We also review overall customer opinions and attitudes towards \\{IHDs\\} and direct feedback to the extent that this information is available from the pilot studies. Our review indicates that the direct feedback provided by \\{IHDs\\} encourages consumers to make more efficient use of energy. We find that consumers who actively use an IHD can reduce their consumption of electricity on average by about 7 percent when prepayment of electricity is not involved. When consumers both use an IHD and are on an electricity prepayment system, they can reduce their electricity consumption by about twice that amount. In regard to demand response impacts, we find that the impact of time-of-use rates is augmented by direct feedback from IHDs.

Ahmad Faruqui; Sanem Sergici; Ahmed Sharif

2010-01-01T23:59:59.000Z

315

Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model  

E-Print Network (OSTI)

2009 P. E. Thornton et al. : Carbon-nitrogen interactionsregulate climate-carbon cycle feedbacks Monfray, P. ,T. H. : A global ocean carbon climatology: Results from

2009-01-01T23:59:59.000Z

316

A ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses during Heinrich events  

E-Print Network (OSTI)

the strong sea ice albedo and insulating feedbacks. Such abrupt sea ice changes can also account was trapped at the base of the ice sheet due to the thick and insulating glacier that prevented it fromA ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses

Tziperman, Eli

317

Geophys. J. Int. (2000) 142, 151161 A damage mechanics model for power-law creep and earthquake  

E-Print Network (OSTI)

applied to constitutive rules for time-dependent subcritical crack growth. In both phases, the individual that transient creep dominates, with 0Crack growth in this stage is stable and decelerating. For a local softening mechanism (positive feedback), mcrack growth is unstable and accelerating. In this case

318

Essays on International Finance and Macroeconomics  

E-Print Network (OSTI)

1.10.2 DMW test . . . . . . . . . . . . . . . . . . .Tests . . . . . . . . . . . . . . . . . . . . . . . . . DMWOS LRV estimators . . . . . . . . . . . . . DMW test: OS LRV

Kim, Young Ju

2014-01-01T23:59:59.000Z

319

Three Essays in Macroeconomics and Financial Economics  

E-Print Network (OSTI)

the vector xt to also include these lagged values. Consequently, x0t ? [y˜ ? r˜? p˜i? g˜? o˜? p˜i o˜] ? . On the other hand, ?t = [a˜ e˜ z˜ ?r] ? . The corresponding matrices A, B, and C are then given by A = ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ?1 0 0 0 1...(5x2) 0 (2x5) ?22(2x2) ? ? ? . Next, let x1t = Z ? x0t such that, in particular, x1t = ? ? ? x11t x12t ? ? ? , where x11t(5x1) = Z ? 11 ? ? ? ? ? ? ? ? ? ? ? ? y˜?1 r˜?1 p˜i?1 g˜?1 o˜?1 ? ? ? ? ? ? ? ? ? ? ? ? +Z ? 21 ? ? ? p˜i o˜ ? ? ? (1.57) and x12t...

Kacaribu, Febrio

2014-05-31T23:59:59.000Z

320

Alternative Measures of Welfare in Macroeconomic Models  

Gasoline and Diesel Fuel Update (EIA)

in the United States," Joint Program Report Series 173, MIT Joint Program on the Science and Policy of Climate Change 2009. RTI, "EMPAX-CGE Model Documentation," Interim...

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Essays on frictions in financial macroeconomics  

E-Print Network (OSTI)

Apr. 1992, 100 (2), pp. Bettis, J. C. , J. L. Coles, and M.of insider in- formation. Bettis et al. (2000) established

Kay, Benjamin S.

2012-01-01T23:59:59.000Z

322

Term Structure Dynamics with Macroeconomic Factors  

E-Print Network (OSTI)

with Macro Variables I present an a ne term structure model with latent factors and observable macroeco- nomic variables. I denote a state variable vector by Xt = (x1t; ;xkt;xk+1t;:::;xnt)0, where the rstk factors are unobservable and the remaining (n k...) factors are macroe- conomic variables. Suppose that Xt follows an Ito process (2.3) dXt = K[ Xt]dt+ p StdWt; where K is an n n matrix, is an n 1 vector. St is an n n diagonal matrix and the ith diagonal element is given as i + 0iXt, where i is a...

Park, Ha-Il

2011-02-22T23:59:59.000Z

323

Prospects for Irish macroeconomic recovery and stability  

Science Journals Connector (OSTI)

Most accounts of Ireland's recent financial and budget crises focus on the failure and questionable practices of banks, the decision by the Irish government to guarantee the debt accumulated by the Irish banks, and the subsequent financial collapse that occurred as international creditors recognised the grave difficulties that Ireland faced in repaying its debt. Our analysis puts the challenges resulting from these events into a larger historical and political context. We contend that the problems Ireland is confronting are best understood as a property bubble, accompanied by regulatory lapses and structural problems in public finance. With respect to problems created by the collapse of the Celtic Tiger, we argue that export-oriented growth, though not a panacea, continues to provide the opportunity for Ireland to grow its economy despite a massive debt and the need for international support for financing this debt.

Nancy Bertaux; Timothy White

2012-01-01T23:59:59.000Z

324

Modelling macroeconomic flows related to large ensembles  

E-Print Network (OSTI)

, including, say, oil prices, interest rates, etc; dynamics of shares markets are governed by information are illustrated by flows of a liquid between interconnected reservoirs, where the heights of different reservoirs is changing with time, and movement of the liquid between the reservoirs is governed by gravity, see Figure 1

Schellekens, Michel P.

325

Adaptive optimal stochastic state feedback control of resistive wall modes in tokamaks  

SciTech Connect

An adaptive optimal stochastic state feedback control is developed to stabilize the resistive wall mode (RWM) instability in tokamaks. The extended least-square method with exponential forgetting factor and covariance resetting is used to identify (experimentally determine) the time-varying stochastic system model. A Kalman filter is used to estimate the system states. The estimated system states are passed on to an optimal state feedback controller to construct control inputs. The Kalman filter and the optimal state feedback controller are periodically redesigned online based on the identified system model. This adaptive controller can stabilize the time-dependent RWM in a slowly evolving tokamak discharge. This is accomplished within a time delay of roughly four times the inverse of the growth rate for the time-invariant model used.

Sun, Z.; Sen, A.K.; Longman, R.W. [Electrical Engineering Department, Columbia University, New York, New York 10027 (United States); Mechanical Engineering Department, Columbia University, New York, New York 10027 (United States)

2006-01-15T23:59:59.000Z

326

Design of a Model-based Controller with Temperature Feedback for Laser Cladding  

Science Journals Connector (OSTI)

Abstract Laser cladding, also known as direct metal deposition, is an additive manufacturing technique for the production of freeform metallic parts. High quality parts can be created with the use of feedback control systems which stabilize the melt pool during the cladding process. Current laser cladding control systems are based on low order, empirical models of the process, which have low dynamic accuracy and limit the performance that can be achieved. In this paper, a control system based on a physical heat conduction model of the melt pool dynamics is presented. The control structure consists of a static linear state feedback control law designed using pole placement and combined with a PI controller. The controller is able to regulate the melt pool size by modulating the laser power using a number of surface temperature measurements as the feedback signal. Simulation results using a detailed finite element model show that the controller has good tracking behavior and disturbance rejection properties.

Wim Devesse; Dieter De Baere; Patrick Guillaume

2014-01-01T23:59:59.000Z

327

High-Gradient Tests of the Single-Cell SC Cavity with a Feedback Waveguide  

SciTech Connect

Use of a superconducting (SC) traveling-wave accelerating (STWA) structure with a small phase advance per cell, rather than a standing-wave structure, may provide a significant increase in the accelerating gradient in the ILC linac [1]. For the same surface electric and magnetic fields, the STWA achieves an accelerating gradient 1.2 larger than TESLA-like standing-wave cavities. In addition, the STWA allows longer acceleration cavities, reducing the number of gaps between them. However, the STWA structure requires a SC feedback waveguide to return the few hundreds of MW of circulating RF power from the structure output to the structure input. A test single-cell cavity with feedback was designed and manufactured to demonstrate the possibility of proper processing to achieve a high accelerating gradient. The first results of high-gradient tests of a prototype 1.3 GHz single-cell cavity with feedback waveguide will be presented.

Yakovlev, V.; Solyak, N.; Wu, G.; Ge, M.; Gonin, I.; Khabiboulline, T.; Ozelis, J.; Rowe, A. [Fermilab, Batavia, IL 60510 (United States); Avrakhov, P.; Kanareykin, A. [Euclid TechLabs, LLC, Solon, Ohio 44139 (United States); Rathke, J. [AES, Medford, NY 11763 (United States)

2010-11-04T23:59:59.000Z

328

ENGINEERING MECHANICS SEMINARSENGINEERING MECHANICS SEMINARS THINK COMPOSITE  

E-Print Network (OSTI)

ENGINEERING MECHANICS SEMINARSENGINEERING MECHANICS SEMINARS THINK COMPOSITE "THINK outside the box" for more competitive structural COMPOSITES Dr. Melih Papila Visiting Professor, Aero/Astro Department, Stanford University. Adv. Composites and Polymer Processing Lab., Sabanci University, Istanbul. mpapila

Ponce, V. Miguel

329

An analytical limitation for time-delayed feedback control in autonomous systems  

E-Print Network (OSTI)

We prove an analytical limitation on the use of time-delayed feedback control for the stabilization of periodic orbits in autonomous systems. This limitation depends on the number of real Floquet multipliers larger than unity, and is therefore similar to the well-known odd number limitation of time-delayed feedback control. Recently, a two-dimensional example has been found, which explicitly demonstrates that the unmodified odd number limitation does not apply in the case of autonomous systems. We show that our limitation correctly predicts the stability boundaries in this case.

Edward W. Hooton; Andreas Amann

2012-09-08T23:59:59.000Z

330

Second law of thermodynamics and quantum feedback control: Maxwell's demon with weak measurements  

SciTech Connect

Recently Sagawa and Ueda [Phys. Rev. Lett. 100, 080403 (2008)] derived a bound on the work that can be extracted from a quantum system with the use of feedback control. For many quantum measurements their bound was not tight. We show that a tight version of this bound follows straightforwardly from recent work on Maxwell's demon by Alicki et al. [Open Syst. Inf. Dyn. 11, 205 (2004)], for both discrete and continuous feedback control. Our analysis also shows that bare, efficient measurements always do non-negative work on a system in equilibrium, but do not add heat.

Jacobs, Kurt [Department of Physics, University of Massachusetts at Boston, Boston, Massachusetts 02125 (United States)

2009-07-15T23:59:59.000Z

331

The Second Law of Thermodynamics and Quantum Feedback Control: Maxwell's Demon with Weak Measurements  

E-Print Network (OSTI)

Recently Sagawa and Ueda [Phys. Rev. Lett. 100, 080403 (2008)] derived a bound on the work that can be extracted from a quantum system with the use of feedback control. They left open the question of whether this bound could be achieved for every measurement that could be made by the controller. We show that it can, and that this follows straightforwardly from recent work on Maxwell's demon by Alicki et al. [Open Syst. Inform. Dynam. 11, 205 (2004)], for both discrete and continuous feedback control. Our analysis also shows that bare, efficient measurements always do non-negative work on a system in equilibrium, but do not add heat.

Kurt Jacobs

2009-06-23T23:59:59.000Z

332

Mechanical & Biomedical Engineering  

E-Print Network (OSTI)

Mechanical & Biomedical Engineering Department BACHELOR OF SCIENCE IN MECHANICAL ENGINEERING COURSE 105 Mechanical Engineering Graphics 3 CHEM 111L College Chemistry Lab (DLN) 1 ENGL 102 English PHYS 211 Mechanics, Waves & Heat (DLN) 4 UF 100 Intellectual Foundations 3 PHYS 211L Mechanics, Waves

Barrash, Warren

333

Feedback Heating by Cosmic Rays in Clusters of Galaxies  

E-Print Network (OSTI)

Recent observations show that the cooling flows in the central regions of galaxy clusters are highly suppressed. Observed AGN-induced cavities/bubbles are a leading candidate for suppressing cooling, usually via some form of mechanical heating. At the same time, observed X-ray cavities and synchrotron emission point toward a significant non-thermal particle population. Previous studies have focused on the dynamical effects of cosmic-ray pressure support, but none have built successful models in which cosmic-ray heating is significant. Here we investigate a new model of AGN heating, in which the intracluster medium is efficiently heated by cosmic-rays, which are injected into the ICM through diffusion or the shredding of the bubbles by Rayleigh-Taylor or Kelvin-Helmholtz instabilities. We include thermal conduction as well. Using numerical simulations, we show that the cooling catastrophe is efficiently suppressed. The cluster quickly relaxes to a quasi-equilibrium state with a highly reduced accretion rate and temperature and density profiles which match observations. Unlike the conduction-only case, no fine-tuning of the Spitzer conduction suppression factor f is needed. The cosmic ray pressure, P_c/P_g heating is a very attractive alternative to mechanical heating, and may become particularly compelling if GLAST detects the gamma-ray signature of cosmic-rays in clusters.

Fulai Guo; S. Peng OH

2007-06-09T23:59:59.000Z

334

Feedback Circuits in Evolving Networks: Micro-Macro Linkages for Biases in Attachment, Routing and Distance Decay  

E-Print Network (OSTI)

Feedback Circuits in Evolving Networks: Micro-Macro Linkages for Biases in Attachment, Routing the phe- nomenon of feedback creation at the micro-level leads to changes in network topology at the macro and analyses still to be completed, v3.03) Abstract. We investigate information networks whose nodes can emit

White, Douglas R.

335

Laser Chaos Induced by Delayed-Feedback and External Modulation Cheng JUANG, Shu-Ming CHANG1  

E-Print Network (OSTI)

Laser Chaos Induced by Delayed-Feedback and External Modulation Cheng JUANG, Shu-Ming CHANG1 , Nien, 2005; published November 9, 2005) Electronic-controlled routes to chaos in a quantum-well laser diode to chaos, intermittency routes to chaos, quantum-well laser diodes, delayed-feedback 1. Introduction

Lin, Wen-Wei

336

Design and Evaluation of a Feedback Control EDF Scheduling Supported in part by NSF grant CCR-9901706 and contract IJRP-  

E-Print Network (OSTI)

Design and Evaluation of a Feedback Control EDF Scheduling Algorithm* * Supported in part by NSF. In this paper, we present a feedback control real-time scheduling algorithm and its evaluation. Performance}@cs.virginia.edu, gt9s@virginia.edu Abstract Despite the significant body of results in real-time scheduling, many real

Lu, Chenyang

337

Design of a Mixed-Signal Cartesian Feedback Loop for a Low Power Zero-IF WCDMA Transmitter  

E-Print Network (OSTI)

-distortion, Feedback and Feed-forward techniques [2]. Among these, Cartesian feedback loop (CFB) [3], which forms-analog architecture [3]. The paper is organized as follow. Section II presents Zero- IF transmitter with the CFB based on a digital CFB implementation is made up of both analog and digital building blocks as shown

Paris-Sud XI, Université de

338

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 4, APRIL 2010 907 Rotor Position Feedback Over an RF Link  

E-Print Network (OSTI)

feedback control. The wireless scheme pre- cludes the need for the cable that feeds the position from the performance of the motor control system. As such, the feedback cable is shielded and the signals are provided in differential form, which increases the sensing cost. Therefore, motor-drive manufacturers have been focusing

Mazumder, Sudip K.

339

1974 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 50, NO. 9, SEPTEMBER 2004 Optimum Noncoherent Multiuser Decision Feedback  

E-Print Network (OSTI)

Abstract--A theory of noncoherent decision feedback multiuser detection for nonorthogonal binary modulation1974 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 50, NO. 9, SEPTEMBER 2004 Optimum Noncoherent Multiuser Decision Feedback Detection Deepak Das, Member, IEEE, and Mahesh K. Varanasi, Senior Member, IEEE

Varanasi, Mahesh K.

340

Can ambient persuasive technology persuade unconsciously?: using subliminal feedback to influence energy consumption ratings of household appliances  

Science Journals Connector (OSTI)

In this paper we explore a fundamental characteristic of Ambient Persuasive Technology: Can it persuade the user without receiving the user's conscious attention? In a task consisting of 90 trials, participants had to indicate which of three household ... Keywords: ambient persuasive technology, energy conservation behavior, human-technology interaction, persuasion, social feedback, subliminal feedback

Jaap Ham; Cees Midden; Femke Beute

2009-04-01T23:59:59.000Z

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to obtain the most current and comprehensive results.


341

Mechanical Engineering Graduate Student  

E-Print Network (OSTI)

......................................................................................9 Engineering Career Services ................................................................9 McMechanical Engineering Graduate Student Handbook January 2014 Department of Mechanical Engineering University of Wisconsin-Madison #12;Mechanical Engineering Web Page: http://www.engr.wisc.edu/me Graduate

Wisconsin at Madison, University of

342

Mechanical & Industrial Engineering  

E-Print Network (OSTI)

Mechanical & Industrial Engineering 1 Welcome MIE Industrial Advisory Board October 15, 2010 #12;Mechanical & Industrial Engineering 2 MIE Dorothy Adams Undergraduate/Graduate Secretary David Schmidt Associate Professor & Graduate Program Director #12;Mechanical & Industrial Engineering 3 MIE James Rinderle

Mountziaris, T. J.

343

MECHANICAL ENGINEERING UNDERGRADUATE MAJOR  

E-Print Network (OSTI)

HANDBOOK FOR MECHANICAL ENGINEERING UNDERGRADUATE MAJOR Old Dominion University Department of Mechanical Engineering Batten College of Engineering and Technology Norfolk, Virginia 23529-0247 #12;TABLE OF CONTENTS MECHANICAL ENGINEERING HANDBOOK

344

Mechanical engineering Department Seminar  

E-Print Network (OSTI)

Mechanical engineering Department Seminar Katia Bertoldi Harvard University Soft materials in response to diverse stimuli. While the mechanical attributes - such as energy absorption, stiffness and switchable functionalities. Katia Bertoldi is an Assistant Professor of Applied Mechanics at Harvard

345

Micromachined force-balance feedback accelerometer with optical displacement detection  

DOE Patents (OSTI)

An accelerometer includes a proof mass and a frame that are formed in a handle layer of a silicon-on-an-insulator (SOI). The proof mass is separated from the frame by a back-side trench that defines a boundary of the proof mass. The accelerometer also includes a reflector coupled to a top surface of the proof mass. An optical detector is located above the reflector at the device side. The accelerometer further includes at least one suspension spring. The suspension spring has a handle anchor that extends downwards from the device side to the handle layer to mechanically support upward and downward movement of the proof mass relative to a top surface of the proof mass.

Nielson, Gregory N.; Langlois, Eric; Baker, Michael; Okandan, Murat; Anderson, Robert

2014-07-22T23:59:59.000Z

346

Monroe Thomas, Mechanical Technician  

NLE Websites -- All DOE Office Websites (Extended Search)

Monroe Thomas, Mechanical Technician Print The weekend before the ALS was scheduled to start up again after the most recent shutdown, mechanical technician Monroe Thomas kept...

347

Optimal Real-Time Scheduling of Control Tasks with State Feedback Resource Allocation  

E-Print Network (OSTI)

1 Optimal Real-Time Scheduling of Control Tasks with State Feedback Resource Allocation Mohamed El for the optimal integrated control and real-time scheduling of control tasks. First, the problem of the optimal integrated control and non- preemptive off-line scheduling of control tasks in the sense of the H2

Paris-Sud XI, Université de

348

Cardiac and Thoracic-Abdominal Surgery A robotic system providing force feedback and automation  

E-Print Network (OSTI)

Surgery, German Heart Center Munich, Germany Abstract We have developed an experimental system for robotic allow a human expert to tie knots comfortably and cleanly, and, therefore, generate useful training and Technology has developed a mi- cro-telerobot system that also provides force feedback [3]. In Ger- many two

349

A method for calculating active feedback system to control vertical position of plasma in a tokamak  

Science Journals Connector (OSTI)

In designing tokamaks, the maintenance of vertical stability of plasma is one of the most important problems. For this purpose systems of passive and active feedbacks are applied. The role of passive system consisting of a vacuum vessel and passive stabilizer ...

Nizami Gasilov

2006-08-01T23:59:59.000Z

350

Modeling and Feedback Control for Air Flow Regulation in Deep Pits  

E-Print Network (OSTI)

1 Modeling and Feedback Control for Air Flow Regulation in Deep Pits Emmanuel WITRANT and Nicolas the air). It is clear that investigating automatic control solutions and minimizing the amount of pumped to the ground turbine control and distributed sensors within the shaft; 2. air quality regulation

Boyer, Edmond

351

Real-time feedback-controlled robotic fish for behavioral experiments with fish schools  

E-Print Network (OSTI)

1 Real-time feedback-controlled robotic fish for behavioral experiments with fish schools Daniel T- gations of collective animal behavior. In the case of fish schooling, new insights into processes such as collective decision making and leadership have been made in recent experiments in which live fish were

Leonard, Naomi

352

Ecological feedbacks following deforestation create the potential for a catastrophic ecosystem shift in tropical dry forest  

Science Journals Connector (OSTI)

...open. Table 1. Atmospheric deposition of phosphorus as...transported by wind and water (13) and in harvest...in P input from atmospheric deposition. Our estimates...ground by storm water washing plant surfaces...and by canopy condensation or fog deposition...feedback in the recovery of tropical...

Deborah Lawrence; Paolo D'Odorico; Lucy Diekmann; Marcia DeLonge; Rishiraj Das; James Eaton

2007-01-01T23:59:59.000Z

353

Leverage vs. Feedback: Which Effect Drives the Oil Market? Sofiane Aboura  

E-Print Network (OSTI)

on the WTI crude oil spot price. An increase in the volatility subsequent to an increase in the oil price (i- and fund-managers. Keywords: WTI, Crude Oil Price, Implied Volatility, Leverage Effect, Feedback Effect. JEL Codes: C4, G1, Q4. 1 Introduction The rise of the US benchmark oil West Texas Intermediate (WTI

Paris-Sud XI, Université de

354

Linear Gaussian Channels: Feedback Capacity under Power Constraints Shaohua Yang1  

E-Print Network (OSTI)

information rate, is Cfb(n) = max P h(Y n 1 )/n - log 2e , (4) where the maximization is under the average and by the National Storage Industry Consortium. Theorem 1: The feedback capacity Cfb(n) is achieved by a Gauss

Kavcic, Aleksandar

355

Gesture output: eyes-free output using a force feedback touch surface  

Science Journals Connector (OSTI)

We propose using spatial gestures not only for input but also for output. Analogous to gesture input, the proposed gesture output moves the user's finger in a gesture, which the user then recognizes. We use our concept in a mobile scenario where a motion ... Keywords: eyes free, force feedback, gestures, touch

Anne Roudaut; Andreas Rau; Christoph Sterz; Max Plauth; Pedro Lopes; Patrick Baudisch

2013-04-01T23:59:59.000Z

356

Force Feedback Stabilization for Remote Control of An Assistive Mobile Robot  

E-Print Network (OSTI)

Force Feedback Stabilization for Remote Control of An Assistive Mobile Robot H. Arioui and L. Temzi and Ph. Hoppenot. Abstract-- In this paper, we consider a bilateral control of an assistive mobile robot over communication channels with constant/variable time delays. The mobile robot is used for exploring

Paris-Sud XI, Université de

357

Questions and Answers Analysis of Feedback on the Design Discussion Document  

E-Print Network (OSTI)

of the feedback that we received has been logged and shared with the Reforms Task Force. For the purposes still move forward with the implementation of the reforms if the results of the pilots- What are the timelines for implementing the reforms? CIHR is currently working on a transition plan

Brownstone, Rob

358

Decision-feedback multiple differential detection for space-time coded OFDM systems  

E-Print Network (OSTI)

by an irreducible error floor if the fading bandwidth is larger than zero. Decision-feedback differential detection (DF-DD) is found to be a very effective method to reduce such an error floor with a very low computational complexity. In this thesis, we first apply...

Liu, Yan

2001-01-01T23:59:59.000Z

359

Radial Error Feedback Geometric Adaptive Control for Bar Turning in CNC Turning Centers  

E-Print Network (OSTI)

Radial Error Feedback Geometric Adaptive Control for Bar Turning in CNC Turning Centers by Chun Fan-6046 liu@eng.fsu.edu, indwang1@eng.fsu.edu Abstract In-process measurement and control of CNC machines can adaptive control (REFGAC) system for bar turning in CNC turning centers. REFGAC system was design to com

Collins, Emmanuel

360

Coordination of Voltage and Frequency Feedback in Load-Frequency Control Capability of Wind Turbine  

E-Print Network (OSTI)

Coordination of Voltage and Frequency Feedback in Load-Frequency Control Capability of Wind Turbine-Frequency Control (LFC) is gradually shifted to Variable Speed Wind Turbines (VSWTs). In order to equip VSWT@et.aau.dk Abstract--In near future, with high penetration of Wind Energy (WE) in power system, the burden of Load

Silva, Filipe Faria Da

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

AGN feedback in galaxy groups: the delicate touch of self-regulated outflows  

Science Journals Connector (OSTI)

......continuous injection of energy tends to slightly overheat this region, especially at late times. The...self-regulation it easily overheats the system. 3.5 Thermal feedback 3.5.1 Adding thermal energy: 20 per cent up to 99 per cent It is......

M. Gaspari; F. Brighenti; A. D'Ercole; C. Melioli

2011-08-01T23:59:59.000Z

362

An Empirical Evaluation of Work Stealing with Parallelism Feedback Kunal Agrawal Yuxiong He Charles E. Leiserson  

E-Print Network (OSTI)

E. Leiserson Computer Science and Artificial Intelligence Laboratory Massachusetts Institute­STEAL on over 2300 job runs using a variety of processor avail­ ability profiles. Linear­regression analysis parallelism feedback. On moderately to heavily loaded large machines with predetermined availability pro

Leiserson, Charles E.

363

An Empirical Evaluation of Work Stealing with Parallelism Feedback Kunal Agrawal Yuxiong He Charles E. Leiserson  

E-Print Network (OSTI)

E. Leiserson Computer Science and Artificial Intelligence Laboratory Massachusetts Institute-STEAL on over 2300 job runs using a variety of processor avail- ability profiles. Linear-regression analysis parallelism feedback. On moderately to heavily loaded large machines with predetermined availability pro

Leiserson, Charles E.

364

A Feedback-based Approach to Reduce Duplicate Messages in Unstructured Peer-to-Peer Networks  

E-Print Network (OSTI)

. Unstructured P2P systems have used flooding as their prevailing resource location method. Flooding dictates the scalability of flooding. The main idea behind our feedback-based algorithm is to monitor the number-up phase does not exceed some predefined threshold. Through extensive simulation we show

Markatos, Evangelos P.

365

A FEEDBACK-BASED APPROACH TO REDUCE DUPLICATE MESSAGES IN UNSTRUCTURED  

E-Print Network (OSTI)

query message to all of its neighbors, a process called flooding. Although this algorithm has excellent an innovative technique, the feedback-based approach that aims to improve the scalability of flooding. The main extensive simulation we show that this algorithm exhibits significant reduction of traffic in random

Markatos, Evangelos P.

366

PPPL3244 Preprint: March 1997, UC420 A Study of MHD Feedback Stabilization in  

E-Print Network (OSTI)

it is caused by the reduction of the electric field which drives the mode: this is achieved with the back­ emf. Lower Hybrid Current Drive (LHCD) has been succesfully employed in current profile control experiments Feedback stabilization of the m=2, n=1 island with Lower Hybrid Current Drive has been theoretically

367

PPPL-3244 -Preprint: March 1997, UC-420 A Study of MHD Feedback Stabilization in  

E-Print Network (OSTI)

it is caused by the reduction of the electric field which drives the mode: this is achieved with the back- emf. Lower Hybrid Current Drive (LHCD) has been succesfully employed in current profile control experiments Feedback stabilization of the m=2, n=1 island with Lower Hybrid Current Drive has been theoretically

368

Project Information Form Project Title Environmentally Friendly Driving Feedback Systems Research and  

E-Print Network (OSTI)

Provided (by each agency or organization) Caltrans $136,000 Total Project Cost $136,000 Agency IDProject Information Form Project Title Environmentally Friendly Driving Feedback Systems Research of Research Project Among several strategies to reduce fuel consumption and greenhouse gas emissions from

California at Davis, University of

369

Can a Convective Cloud Feedback Help to Eliminate Winter Sea Ice at High CO2 Concentrations?  

E-Print Network (OSTI)

have remote effects on global climate as well. Accurate forecasting of winter sea ice has significantCan a Convective Cloud Feedback Help to Eliminate Winter Sea Ice at High CO2 Concentrations? DORIAN) ABSTRACT Winter sea ice dramatically cools the Arctic climate during the coldest months of the year and may

Tziperman, Eli

370

TSC simulation of feedback stabilization of axisymmetric modes in tokamaks using driven halo currents  

SciTech Connect

The Tokamak Simulation Code (TSC) has been used to model a new method of feedback stabilization of the axisymmetric instability in tokamaks using driven halo (or scrapeoff layer) currents. The method appears to be feasible for a wide range of plasma edge parameters. It may offer significant advantages over the more conventional method of controlling this instability when applied in a reactor environment.

Jardin, S.C.; Schmidt, J.A. [Princeton Univ., NJ (United States). Princeton Plasma Physics Lab.

1997-03-01T23:59:59.000Z

371

Feedback Form Page 1 Evaluation of 2012 CPLC UIUC Physical Biology Boot Camp  

E-Print Network (OSTI)

Feedback Form Page 1 Evaluation of 2012 CPLC ­ UIUC Physical Biology Boot Camp on Single of Illinois. To address this need, we offered the 1st CPLC-UIUC Physical Biology Boot Camp from January 11-13, 2012 to researchers at the Urbana-Champaign campus. For our first boot camp topic, we focused

Myong, Sua

372

Feedback Control of MHD kink instabilities on the HBT-EP tokamak  

E-Print Network (OSTI)

Feedback Control of MHD kink instabilities on the HBT-EP tokamak David A. Maurer American Physical instabilities on the HBT-EP tokamak J. Bialek1 , J. Bodeo2 , A. H. Boozer1 , C. Cates1 , L. Chousal2 , R modes · HBT-EP passive and active control systems · Passive and active HBT-EP control experiments

373

Coupled Oscillations of Calcium and IP3: Identification of Feedback Loops  

E-Print Network (OSTI)

Coupled Oscillations of Calcium and IP3: Identification of Feedback Loops with Andrew Thomas(cyt)Ca(ER) Ca(cyt) Calcium oscillator +/- Schuster, Marhl & Höfer, Eur. J. Biochem. (2002) #12;IP3 DAG Hormone for the calcium oscillator? #12;Höfer, Venance & Giaume J. Neurosci. (2002) #12;3 modes of intercellular signaling

Coombes, Stephen

374

The role of sea ice in the temperature-precipitation feedback of glacial cycles  

E-Print Network (OSTI)

precipitation over the ice sheets. The insulating effect of the sea ice on the hydrological cycle is foundThe role of sea ice in the temperature-precipitation feedback of glacial cycles Hezi Gildor · Yosef climate history can shed some light. Sea ice is a key player in the climate system and in the hydrological

Tziperman, Eli

375

The role of sea ice in the temperature-precipitation feedback of glacial cycles  

E-Print Network (OSTI)

to an increase in snow precipitation over the ice sheets. The insulating effect of the sea iceThe role of sea ice in the temperature-precipitation feedback of glacial cycles Hezi Gildor · Yosef unsatisfactory, yet upon which past climate history can shed some light. Sea ice is a key player in the climate

Tziperman, Eli

376

Improving students' help-seeking skills using metacognitive feedback in an intelligent tutoring system  

E-Print Network (OSTI)

Improving students' help-seeking skills using metacognitive feedback in an intelligent tutoring on students' help-seeking errors can help students acquire better help-seeking skills. The Help Tutor, an intelligent tutor agent for help seeking, was integrated into a commercial tutoring system for geometry

McLaren, Bruce Martin

377

Cloud-Climate Feedback: Lessons Learned From Two El nio Events  

E-Print Network (OSTI)

Cloud-Climate Feedback: Lessons Learned From Two El niño Events Minghua Zhang Institute - ABSTRACT Monthly ERBE and CERES measurements are used to study the response of cloud radiative forcing that the response of cloud forcing to SST over the whole tropics is very different from that to local SST changes

Zhang, Minghua

378

Tips for Giving and Receiving Feedback Effectively Contact your HR Consultant if you have any questions.  

E-Print Network (OSTI)

the following: Highlight the consequences of what you have observed or heard so your partner understands why, and the likely consequences for them personally. #12;www their understanding, not to provide them with "the truth." TIPS FOR RECEIVING FEEDBACK EFFECTIVELY: 1. Know what

Myers, Lawrence C.

379

Sensorless Adaptive Output Feedback Control of Wind Energy Systems with PMS Generators  

E-Print Network (OSTI)

1 Sensorless Adaptive Output Feedback Control of Wind Energy Systems with PMS Generators A. El the problem of controlling wind energy conversion (WEC) systems involving permanent magnet synchronous is to maximize wind energy extraction which cannot be achieved without letting the wind turbine rotor operate

Boyer, Edmond

380

Feedback processes between magmatic events and flank movement at Mount Etna (Italy) during the 20022003 eruption  

E-Print Network (OSTI)

. The models suggest that the 2002­2003 events are the result of interrelated processes consisting of (1Feedback processes between magmatic events and flank movement at Mount Etna (Italy) during the 2002 and southeastern flanks. Understanding the precise interconnectivity of these processes may help to forecast

Amelung, Falk

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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381

Enhancing single-molecule photostability by optical feedback from quantum jump detection  

E-Print Network (OSTI)

Enhancing single-molecule photostability by optical feedback from quantum jump detection V. Jacques; published online 20 November 2008 We report an optical technique that yields an enhancement of single-molecule and will allow the investigation of new phenomena at the single-molecule level. © 2008 American Institute

Murray, John D.

382

WindEvaporation Feedback and Abrupt Seasonal Transitions of Weak, Axisymmetric Hadley Circulations  

E-Print Network (OSTI)

Wind­Evaporation Feedback and Abrupt Seasonal Transitions of Weak, Axisymmetric Hadley Circulations dynamics because the barotropic component of the Hadley circulation, which is coupled to the baroclinic-equatorial Hadley cell can create barotropic westerlies that constructively add to the baroclinic wind

383

Diagnostic analysis of atmospheric moisture and clear-sky radiative feedback in the Hadley  

E-Print Network (OSTI)

Diagnostic analysis of atmospheric moisture and clear-sky radiative feedback in the Hadley Centre and Geophysical Fluid Dynamics Laboratory (GFDL) climate models Richard P. Allan Hadley Centre, Met Office Jersey, USA A. Slingo1 Hadley Centre, Met Office, Bracknell, UK Received 23 July 2001; revised 20

Allan, Richard P.

384

WindEvaporation Feedback and the Axisymmetric Transition to Angular MomentumConserving Hadley Flow  

E-Print Network (OSTI)

Wind­Evaporation Feedback and the Axisymmetric Transition to Angular Momentum­Conserving Hadley Hadley circula- tions is examined for forcings strong enough to produce meridional flow that nearly) meridional flow. A previous theory of frontogenesis in tropical cyclones is adapted to axisymmetric Hadley

385

Ecogeomorphic feedbacks in regrowth of travertine step-pool morphology after dam decommissioning, Fossil Creek, Arizona  

E-Print Network (OSTI)

online xxxx Keywords: Travertine Step-pools River restoration Algae Erosion Aquatic ecosystems The linkages between fluvial geomorphology and aquatic ecosystems are commonly conceptualized as a one, coupled with the beneficial effects of travertine on ecosystem dynamics, demonstrate a positive feedback

Marks, Jane

386

On Optimal Training and Beamforming in Uncorrelated MIMO Systems with Feedback  

E-Print Network (OSTI)

the optimum number of pilots and training power allocation of a training-based MIMO system in the senseOn Optimal Training and Beamforming in Uncorrelated MIMO Systems with Feedback Francisco Rubio allocated to training operation and data transmission was evaluated in [3]. In particular, they provided

Honig, Michael L.

387

low graphics version | feedback | help You are in: Sci/Tech  

E-Print Network (OSTI)

low graphics version | feedback | help You are in: Sci/Tech Front Page World UK UK Politics. The signals were detected by the seismology division of the Royal Netherlands Meteorological Institute. Its Infrasound stations Royal Netherlands Meteorological Institute Infrasound monitoring The BBC

Evers, Läslo G.

388

Forcings and feedbacks in the GeoMIP ensemble for a reduction in solar  

E-Print Network (OSTI)

Forcings and feedbacks in the GeoMIP ensemble for a reduction in solar irradiance and increase Canadian Centre for Climate Modelling and Analysis, Environment Canada, Toronto, Ontario, Canada, 5 School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada, 6 State Key

Robock, Alan

389

Bowed string synthesis with force feedback gesture interaction Jean-Loup Florens, Cyrille Henry  

E-Print Network (OSTI)

Introduction In sustained oscillation instruments (like bow string instruments, reed instrumentsBowed string synthesis with force feedback gesture interaction Jean-Loup Florens, Cyrille Henry string, which closely links the properties of the produced sounds to the gesture and energetic investment

Paris-Sud XI, Université de

390

Correlation between present-day model simulation of Arctic cloud radiative forcing and sea ice consistent with positive winter convective cloud feedback  

E-Print Network (OSTI)

A positive feedback on winter sea-ice loss, based on warming due to radiative forcing caused by the onset of convective clouds in response to sea-ice loss, has recently been proposed. This feedback has thus far been ...

Emanuel, Kerry Andrew

391

Mechanical & Industrial Engineering  

E-Print Network (OSTI)

Mechanical & Industrial Engineering 1 Welcome MIE Industrial Advisory Board May 5th, 2011 #12;Mechanical & Industrial Engineering 2 IAB 2010-2011 · David K. Anderson ­ Alden Research Laboratory, Inc went on for three weeks Mechanical & Industrial Engineering 6 #12;Reza Shahbazian Yassar Mechanical

Mountziaris, T. J.

392

Career Map: Mechanical Engineer  

Energy.gov (U.S. Department of Energy (DOE))

The Wind Program's Career Map provides job description information for Mechanical Engineer positions.

393

Mechanical Engineering Undergraduate  

E-Print Network (OSTI)

Mechanical Engineering Department Undergraduate Advising Manual for Bachelor of Science Degrees in Mechanical Engineering and Engineering Mechanics 2011-2012 - Updated April 15, 2012 #12;Johns Hopkins University ­ Department of Mechanical Engineering 2011-2012 Undergraduate Student Advising Manual Page 2

Ghosh, Somnath

394

Mechanical engineering Department Seminar  

E-Print Network (OSTI)

Mechanical engineering Department Seminar James Bird Department of Mechanical Engineering Boston ­ are discussed. James Bird is an Assistant Professor in the Mechanical Engineering Department at Boston completed post-doctoral research at MIT. His research interests include experimental fluid mechanics

395

Mechanical Engineering Undergraduate  

E-Print Network (OSTI)

Mechanical Engineering Department Undergraduate Advising Manual for Bachelor of Science Degrees in Mechanical Engineering and Engineering Mechanics 2012-2013 - Updated July 14, 2013 #12;Johns Hopkins University ­ Department of Mechanical Engineering 2012-2013 Undergraduate Student Advising Manual Page 2

Ghosh, Somnath

396

Mechanical Engineering & Thermal Group  

E-Print Network (OSTI)

Mechanical Engineering & Thermal Group The Mechanical Engineering (ME) & Thermal Group at LASP has, and ground- based mechanical systems. Instrument Design Building on decades of design experience that has evolved with the complexity of instrument design demands, LASP mechanical engineers develop advanced

Mojzsis, Stephen J.

397

Combined Quantum Mechanical and Molecular Mechanics Studies of...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mechanical and Molecular Mechanics Studies of the Electron-Transfer Reactions Involving Carbon Tetrachloride in Combined Quantum Mechanical and Molecular Mechanics Studies of the...

398

Modeling of hydroecological feedbacks predicts distinct classes of landscape pattern, process, and restoration potential in shallow aquatic ecosystems  

Science Journals Connector (OSTI)

It is widely recognized that interactions between vegetation and flow cause the emergence of channel patterns that are distinct from the standard Schumm classification of river channels. Although landscape pattern is known to be linked to ecosystem services such as habitat provision, pollutant removal, and sustaining biodiversity, the mechanisms responsible for the development and stability of different landscape patterns in shallow, vegetated flows have remained poorly understood. Fortunately, recent advances have made possible large-scale models of flow through vegetated environments that can be run over a range of environmental variables and over timescales of millennia. We describe a new, quasi-3D cellular automata model that couples simulations of shallow-water flow, bed shear stresses, sediment transport, and vegetation dynamics in an efficient manner. That efficiency allowed us to apply the model widely in order to determine how different hydroecological feedbacks control landscape pattern and process in various types of wetlands and floodplains. Distinct classes of landscape pattern were uniquely associated with specific types of allogenic and autogenic drivers in wetland flows. Regular, anisotropically patterned wetlands were dominated by allogenic processes (i.e., processes driven by periodic high water levels and flow velocities that redistribute sediment), relative to autogenic processes (e.g., vegetation production, peat accretion, and gravitational erosion). These anistropically patterned wetlands are therefore particularly prone to hydrologic disturbance. Other classes of wetlands that emerged from simulated interactions included maze-patterned, amorphous, and topographically noisy marshes, open marsh with islands, banded string-pool sequences perpendicular to flow, parallel deep and narrow channels flanked by marsh, and ridge-and-slough patterned marsh oriented parallel to flow. Because vegetation both affects and responds to the balance between the transport capacity of the flow and sediment supply, these vegetated systems exhibit a feedback that is not dominant in most rivers. Consequently, unlike in most rivers, it is not possible to predict the “channel pattern” of a vegetated landscape based only on discharge characteristics and sediment supply; the antecedent vegetation pattern and vegetation dynamics must also be known. In general, the stability of different wetland pattern types is most strongly related to factors controlling the erosion and deposition of sediment at vegetation patch edges, the magnitude of sediment redistribution by flow, patch elevation relative to water level, and the variability of erosion rates in vegetation patches with low flow-resistance. As we exemplify in our case-study of the Everglades ridge and slough landscape, feedback between flow and vegetation also causes hysteresis in landscape evolution trajectories that will affect the potential for landscape restoration. Namely, even if the hydrologic conditions that historically produced higher flows are restored, degraded portions of the ridge and slough landscape are unlikely to revert to their former patterning. As wetlands and floodplains worldwide become increasingly threatened by climate change and urbanization, the greater mechanistic understanding of landscape pattern and process that our analysis provides will improve our ability to forecast and manage the behavior of these ecosystems.

Laurel G. Larsen; Judson W. Harvey

2011-01-01T23:59:59.000Z

399

Sandia National Laboratories: Mechanical Testing  

NLE Websites -- All DOE Office Websites (Extended Search)

EnergyNuclear Energy Systems Laboratory (NESL) Brayton LabMechanical Testing Mechanical Testing Mechanical Testing Overview Mechanical 1-2 (2008). Standard Test Methods for...

400

NSLS Mechanical Tech  

NLE Websites -- All DOE Office Websites (Extended Search)

Mechanical Tech Mechanical Tech The Mechanical Technician group is supervised by Robert Scheuerer and consists of Mechanical Technicians with fabrication/machining, assembly, installation, and alignment/surveying skills. This group also serves as an interface to Central Fabrication Services when more complex or larger fabrication efforts are needed. The Mechanical Tech group is responsible for fabricating, installing, aligning, and troubleshooting the mechanical hardware used on NSLS and SDL accelerators, front ends, and User beamlines, often starting solely from Mechanical Design group drawings or CAD files. The Mechanical Tech Group is responsible for the fabrication, assembly and installation of components at the NSLS. These components include all mechanical assemblies and RF cavities. Another part of their job is to

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Meeting Summary for Diagnostic and Performance Feedback for Residential Space Conditioning System Equipment Expert Meeting  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Final Report on the Expert Meeting for Final Report on the Expert Meeting for DIAGNOSTIC AND PERFORMANCE FEEDBACK FOR RESIDENTIAL SPACE CONDITIONING SYSTEM EQUIPMENT Building Science Corporation Industry Team 15 July 2010 Work Performed Under Funding Opportunity Number: DE-FC26-08NT00601 Submitted By: Building Science Corporation 30 Forest Street Somerville, MA 02143 Principal Investigators: Joseph W. Lstiburek, Ph.D., P.Eng. ASHRAE Fellow Betsy Pettit, FAIA Phone Number: 978-589-5100 Fax Number: 978-589-5103 E-Mail: joe@buildingscience.com E-Mail: betsy@buildingscience.com Submitted To: U. S. Department of Energy National Energy Technology Laboratory PM: Rob Martinez E-Mail: Rob.Martinez@NETL.DOE.GOV EXECUTIVE SUMMARY 1. Title: Final Report on the Expert Meeting for Diagnostic and Performance Feedback for

402

Feedback and Continuous Improvement Inspection Criteria and Approach - DOE Field Element, December 4, 2012  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Subject: Feedback and HS: HSS CRAD 45-21 U.S. Department of Continuous Improvement Rev: 1 Energy Inspection Criteria and Approach Eff. Date: December 4, 2012 - DOE Field Element Office of Safety and ~ Acting Di lector, Oftrce of Safety Emergency Management Evaluations and Emergency Management Evaluations Date: \ ~~ Ll\ \ &.... ~ Page 1 of 15 Criteria Review and Criteria Lead, Feedback and Approach Document Continuous Improvement Inspection Criteria and Approach - DOE Field Element Date: \:}.. \~ \1 a- 1.0 PURPOSE Within the Office of Enforcement and Oversight, the Office of Safety and Emergency Management Evaluations' mission is to assess the effectiveness of those environment, safety, and health systems and practices used by field organizations in implementing Integrated Safety

403

Feedback control of a flow past a cylinder via transverse motion  

Science Journals Connector (OSTI)

The instability giving rise to the Karman vortex street in a flow past a circular cylinder is responsible for the occurrence of large amplitude oscillations in the lift. In this work we seek to control the instability via active feedback control by means of transverse displacements of the solid structure. Our investigation is based on Föppl’s four-dimensional potential flow model of point vortices. A feedback controller capable of manipulating the flow in order to maintain zero lift at all times is derived analytically by using perturbation methods and asymptotic expansions. We then apply the controller to the viscousflow by direct numerical simulation of the flow based on the two-dimensional Navier–Stokes equations and show that our control algorithm is capable of keeping the lift close to zero in the impulsively started viscousflow and therefore controllingvortex shedding. Computations are carried out at the Reynolds numbers Re=100 and Re=200.

Fu Li; Nadine Aubry

2003-01-01T23:59:59.000Z

404

Nonlinear power flow feedback control for improved stability and performance of airfoil sections  

DOE Patents (OSTI)

A computer-implemented method of determining the pitch stability of an airfoil system, comprising using a computer to numerically integrate a differential equation of motion that includes terms describing PID controller action. In one model, the differential equation characterizes the time-dependent response of the airfoil's pitch angle, .alpha.. The computer model calculates limit-cycles of the model, which represent the stability boundaries of the airfoil system. Once the stability boundary is known, feedback control can be implemented, by using, for example, a PID controller to control a feedback actuator. The method allows the PID controller gain constants, K.sub.I, K.sub.p, and K.sub.d, to be optimized. This permits operation closer to the stability boundaries, while preventing the physical apparatus from unintentionally crossing the stability boundaries. Operating closer to the stability boundaries permits greater power efficiencies to be extracted from the airfoil system.

Wilson, David G.; Robinett, III, Rush D.

2013-09-03T23:59:59.000Z

405

Suppression of star formation in early-type galaxies by feedback from supermassive black holes  

E-Print Network (OSTI)

Detailed high-resolution observations of the innermost regions of nearby galaxies have revealed the presence of supermassive black holes1. These black holes may interact with their host galaxies by means of 'feedback' in the form of energy and material jets; this feedback affects the evolution of the host and gives rise to observed relations between the black hole and the host. Here we report observations of the ultraviolet emissions of massive early-type galaxies. We derive an empirical relation for a critical black-hole mass (as a function of velocity dispersion) above which the outflows from these black holes suppress star formation in their hosts by heating and expelling all available cold gas. Supermassive black holes are negligible in mass compared to their hosts but nevertheless seem to play a critical role in the star formation history of galaxies.

Kevin Schawinski; Sadegh Khochfar; Sugata Kaviraj; Sukyoung K. Yi; Alessandro Boselli; Tom Barlow; Tim Conrow; Karl Forster; Peter G. Friedman; D. Chris Martin; Patrick Morrissey; Susan Neff; David Schiminovich; Mark Seibert; Todd Small; Ted K. Wyder; Luciana Bianchi; Jose Donas; Tim Heckman; Young-Wook Lee; Barry Madore; Bruno Milliard; R. Michael Rich; Alex Szalay

2006-08-24T23:59:59.000Z

406

State-space model identification and feedback control of unsteady aerodynamic forces  

E-Print Network (OSTI)

Unsteady aerodynamic models are necessary to accurately simulate forces and develop feedback controllers for wings in agile motion; however, these models are often high dimensional or incompatible with modern control techniques. Recently, reduced-order unsteady aerodynamic models have been developed for a pitching and plunging airfoil by linearizing the discretized Navier-Stokes equation with lift-force output. In this work, we extend these reduced-order models to include multiple inputs (pitch, plunge, and surge) and explicit parameterization by the pitch-axis location, inspired by Theodorsen's model. Next, we investigate the na\\"{\\i}ve application of system identification techniques to input--output data and the resulting pitfalls, such as unstable or inaccurate models. Finally, robust feedback controllers are constructed based on these low-dimensional state-space models for simulations of a rigid flat plate at Reynolds number 100. Various controllers are implemented for models linearized at base angles of ...

Brunton, Steven L; Rowley, Clarence W

2014-01-01T23:59:59.000Z

407

Regenerative Feedback Resonant Circuit to Detect Transient Changes in Electromagnetic Properties of Semi-Insulating Materials  

SciTech Connect

A prototype regenerative feedback resonant circuit has been developed for measuring the transient spectral response due to perturbations in properties of various electromagnetic materials. The circuit can accommodate a variety of cavity resonators, shown here in the 8 GHz range, with passive quality factors (Qstat) as high as 7,000 depending upon material loading. The positive feedback enhanced dynamic quality factors (Qdyn) of resonator/material combinations in the regenerative circuit are on the order of 107 - 108. The theory, design, and implementation of the circuit is discussed along with real-time monitored example measurements of effects due to photon-induced charge carriers in high-resistivity silicon wafers and magnetic-field induced perturbations of yttrium-iron garnet.

Jones, Anthony M.; Kelly, James F.; Severtsen, Ronald H.; McCloy, John S.

2013-08-08T23:59:59.000Z

408

Gusty, gaseous flows of FIRE: galactic winds in cosmological simulations with explicit stellar feedback  

E-Print Network (OSTI)

We present an analysis of the galaxy-scale gaseous outflows from the FIRE (Feedback in Realistic Environments) simulations. This suite of hydrodynamic cosmological zoom simulations provides a sample of halos where star-forming giant molecular clouds are resolved to z=0, and features an explicit stellar feedback model on small scales. In this work, we focus on quantifying the gas mass ejected out of galaxies in winds and how this material travels through the halo. We correlate these quantities to star formation in galaxies throughout cosmic history. Our simulations reveal that a significant portion of every galaxy's evolution, particularly at high redshift, is dominated by bursts of star formation, which are followed by powerful gusts of galactic outflow that sweep up a large fraction of gas in the interstellar medium and send it through the circumgalactic medium. The dynamical effect of these outflows can significantly limit the amount of star formation within the affected galaxy. At low redshift, however, su...

Muratov, Alexander L; Faucher-Giguere, Claude-Andre; Hopkins, Philip F; Quataert, Eliot; Murray, Norman

2015-01-01T23:59:59.000Z

409

Operating wind turbines in strong wind conditions by using feedforward-feedback control  

Science Journals Connector (OSTI)

Due to the increasing penetration of wind energy into power systems, it becomes critical to reduce the impact of wind energy on the stability and reliability of the overall power system. In precedent works, Shen and his co-workers developed a re-designed operation schema to run wind turbines in strong wind conditions based on optimization method and standard PI feedback control, which can prevent the typical shutdowns of wind turbines when reaching the cut-out wind speed. In this paper, a new control strategy combing the standard PI feedback control with feedforward controls using the optimization results is investigated for the operation of variable-speed pitch-regulated wind turbines in strong wind conditions. It is shown that the developed control strategy is capable of smoothening the power output of wind turbine and avoiding its sudden showdown at high wind speeds without worsening the loads on rotor and blades.

Ju Feng; Wen Zhong Sheng

2014-01-01T23:59:59.000Z

410

Reduced-Order Model Based Feedback Control For Modified Hasegawa-Wakatani Model  

SciTech Connect

In this work, the development of model-based feedback control that stabilizes an unstable equilibrium is obtained for the Modi ed Hasegawa-Wakatani (MHW) equations, a classic model in plasma turbulence. First, a balanced truncation (a model reduction technique that has proven successful in ow control design problems) is applied to obtain a low dimensional model of the linearized MHW equation. Then a modelbased feedback controller is designed for the reduced order model using linear quadratic regulators (LQR). Finally, a linear quadratic gaussian (LQG) controller, which is more resistant to disturbances is deduced. The controller is applied on the non-reduced, nonlinear MHW equations to stabilize the equilibrium and suppress the transition to drift-wave induced turbulence.

I.R. Goumiri, C.W. Rowley, Z. Ma, D.A. Gates, J.A. Krommes and J.B. Parker

2013-01-28T23:59:59.000Z

411

Reduced-order model based feedback control of the modified Hasegawa-Wakatani model  

SciTech Connect

In this work, the development of model-based feedback control that stabilizes an unstable equilibrium is obtained for the Modified Hasegawa-Wakatani (MHW) equations, a classic model in plasma turbulence. First, a balanced truncation (a model reduction technique that has proven successful in flow control design problems) is applied to obtain a low dimensional model of the linearized MHW equation. Then, a model-based feedback controller is designed for the reduced order model using linear quadratic regulators. Finally, a linear quadratic Gaussian controller which is more resistant to disturbances is deduced. The controller is applied on the non-reduced, nonlinear MHW equations to stabilize the equilibrium and suppress the transition to drift-wave induced turbulence.

Goumiri, I. R.; Rowley, C. W.; Ma, Z. [Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544 (United States); Gates, D. A.; Krommes, J. A.; Parker, J. B. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08544 (United States)

2013-04-15T23:59:59.000Z

412

Eliminating the possibility at Chernobyl 4 of recriticality with positive feedback  

SciTech Connect

We have recently published an article in which we discuss means by which plutonium and other fissile material stored underground could reach criticality with positive feedback and therefore explosive potential. The Chernobyl rubble involving hundreds of tons of material is similar in some respects to the systems analyzed in the paper, and the practices there to control criticality may well increase the probability of a second event at Chernobyl 4. This paper explores the Chernobyl situation and remedial actions are recommended.

Bowman, C.D.

1996-04-29T23:59:59.000Z

413

Intrinsic reactivity feedback characteristics for safety analysis of heterogeneous and homogeneous LMFBR core designs  

SciTech Connect

This paper presents a comparison of the intrinsic reactivity feedback characteristics of homogeneous and heterogeneous LMFBR designs. The comparisons are shown for a 1000 MWth LMFBR core design. However, the applicability of the conclusions drawn from these comparisons are generic to larger LMFBRs. Consistent sodium void worth distributions have been calculated for heterogeneous and homogeneous 1000 MWth LMFBR core designs. The basic calculations were performed with three dimensional models using ENDF/B-III cross section data and first order perturbation theory.

Doncals, R.A.; Lake, J.A.

1982-01-01T23:59:59.000Z

414

Calculation of the reactivity feedback due to core-assembly bowing in LMFBRs  

SciTech Connect

The nonuniformity of the temperature distribution in an LMFBR leads to differential thermal expansion of the walls of an assembly hexcan. These thermal expansion differentials cause the hexcan to distort or bow. Consequentially, the assembly experiences a spatial displacement, which results in a change in reactivity for the core. A computational model to calculate the reactivity feedback due to material displacements induced by assembly bowing effects has been developed.

Not Available

1983-01-01T23:59:59.000Z

415

Compliant mechanism learning toolkit  

E-Print Network (OSTI)

This thesis concerns a toolkit designed to assist in learning the behavior of complaint mechanisms. In the design of complaint mechanisms, increasingly complicated designs behave in ways that are harder to intuitively ...

Allard, Nicholas (Nicholas A.)

2006-01-01T23:59:59.000Z

416

Towards a Resolution of the Galactic Spin Crisis: Mergers, Feedback, and Spin Segregation  

E-Print Network (OSTI)

We model in simple terms the angular-momentum problems of galaxy formation in CDM cosmologies, and identify the key elements of a scenario that may solve them. The buildup of angular momentum is modeled via dynamical friction and tidal stripping in a sequence of mergers. We demonstrate how over-cooling in incoming halos leads to a transfer of angular momentum from the baryons to the dark matter, in conflict with observations. By incorporating a simple recipe of supernova feedback, we are able to solve the problems of angular momentum in disk formation. Gas removal from the numerous small incoming halos, which merge to become the low specific angular momentum (j) component of the product, eliminates the low-j baryons. Heating and puffing-up of the gas in larger incoming halos, combined with efficient tidal stripping, reduces the angular momentum loss of baryons due to dynamical friction. Dependence of the feedback effects on the progenitor halo mass implies that the spin of baryons is typically higher for lower mass halos. The observed low baryonic fraction in dwarf galaxies is used to calibrate the characteristic velocity associated with supernova feedback, yielding ~100 km/s, within the range of theoretical expectations. We then find that the model naturally produces the observed distribution of the spin parameter among dwarf and bright disk galaxies, as well as the j profile inside these galaxies. This suggests that the model indeed captures the main features of a full scenario for resolving the spin crisis.

Ariyeh H. Maller; Avishai Dekel

2002-01-11T23:59:59.000Z

417

Analysis on the feedback effect for the diffusion of innovative technologies focusing on the green car  

Science Journals Connector (OSTI)

Previous studies of technical competitive relationship have mostly focused on the analysis of one-directional impact of the technical attribute on market share. However, there is a cyclical feedback effect between the technical attributes and market share, and that means the small difference of competitiveness at the early phase of technology diffusion can greatly affect the final market share. As such, this study presents the system dynamics model which can forecast sales of innovative technology considering the feedback effect of market share on technical attributes. For that, the causal loop diagram among the various variables was defined using the econometric model applied and proven in various studies of the Bass diffusion model, discrete choice model, etc. to reinforce the theoretical background of the causal relationship among the variables of the forecasting model. Furthermore, infrastructure building scenarios and feedback effect scenarios were applied to the developed forecasting model to present the implication for successful adoption of green car technology from the infrastructure development view point.

Duk Hee Lee; Sang Yong Park; Jong Wook Kim; Seong Kon Lee

2013-01-01T23:59:59.000Z

418

Programmable Mechanical Metamaterials  

E-Print Network (OSTI)

We create mechanical metamaterials whose response to uniaxial compression can be programmed by lateral confinement, allowing monotonic, non-monotonic and hysteretic behavior. These functionalities arise from a broken rotational symmetry which causes highly nonlinear coupling of deformations along the two primary axes of these metamaterials. We introduce a soft mechanism model which captures the programmable mechanics, and outline a general design strategy for confined mechanical metamaterials. Finally, we show how inhomogeneous confinement can be explored to create multi stability and giant hysteresis.

Bastiaan Florijn; Corentin Coulais; Martin van Hecke

2014-07-17T23:59:59.000Z

419

On the Usage of Spectral and Broadband Satellite Instrument Measurements to Differentiate Climate Models with Different Cloud Feedback Strengths  

Science Journals Connector (OSTI)

Top-of-atmosphere radiometric signals associated with different high- and low-cloud–radiative feedbacks have been examined through the use of an observing system simulation experiment (OSSE). The OSSE simulates variations in the spectrally ...

Daniel R. Feldman; Daniel M. Coleman; William D. Collins

2013-09-01T23:59:59.000Z

420

A Model-Based Decomposition of the Sea Ice–Atmosphere Feedback over the Barents Sea during Winter  

Science Journals Connector (OSTI)

The feedback between Barents Sea ice and the winter atmosphere was studied in a modeling framework by decomposing it into two sequential boundary forcing experiments. The Community Ice Code (CICE) model was initialized with anomalously high sea ...

Jessica Liptak; Courtenay Strong

2014-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Achieving Greater Feedback and Flexibility Using Online Pre-Laboratory Exercises with Non-Major Chemistry Students  

Science Journals Connector (OSTI)

Achieving Greater Feedback and Flexibility Using Online Pre-Laboratory Exercises with Non-Major Chemistry Students ... The online pre-laboratory exercises were designed to be straightforward, endeavoring to help students maximize the benefits of the introductory laboratory class. ...

Gail D. Chittleborough; David F. Treagust; Mauro Mocerino

2007-05-01T23:59:59.000Z

422

Proceedings of KIIS Spring Conference 2014 Vol. 24, No. 1. A Viewer Preference Model Based on Physiological Feedback  

E-Print Network (OSTI)

. : Recommendation System, Sentiment Analysis, EDA, Machine Learning, Physiological feedback. : (NRF-2010 , . arg arg , R Y N . X / 2 . 3D , EDA ( 2, 2011. [2] D. McDuff et al. "AffectAura: an intelligent system for emotional memory," Proceedings

Zhang, Byoung-Tak

423

Weak Responses to Auditory Feedback Perturbation during Articulation in Persons Who Stutter: Evidence for Abnormal Auditory-Motor Transformation  

E-Print Network (OSTI)

Previous empirical observations have led researchers to propose that auditory feedback (the auditory perception of self-produced sounds when speaking) functions abnormally in the speech motor systems of persons who stutter ...

Cai, Shanqing

424

What People Do with Consumption Feedback: A Long-Term Living Lab Study of a Home Energy Management System  

Science Journals Connector (OSTI)

......Rossello-Busquet and Soler, 2012). In future, by combining concepts from consumption feedback, home automation and demand response research (LaMarche et al., 2011), HEMSs are expected to become two-way solutions allowing for both: monitoring......

Tobias Schwartz; Gunnar Stevens; Timo Jakobi; Sebastian Denef; Leonardo Ramirez; Volker Wulf; Dave Randall

2014-04-01T23:59:59.000Z

425

The MYB23 Gene Provides a Positive Feedback Loop for Cell Fate Specification in the Arabidopsis Root Epidermis  

Science Journals Connector (OSTI)

...D., and Wolpert, L. (1981). Theories of Biological Pattern Formation. (London...and Meinhardt, H. (1972). A theory of biological pattern formation. Kybernetik...feedback loop to reinforce cell fate decisions and ensure robust establishment of the...

Yeon Hee Kang; Victor Kirik; Martin Hulskamp; Kyoung Hee Nam; Katherine Hagely; Myeong Min Lee; John Schiefelbein

2009-04-24T23:59:59.000Z

426

Growing Literature, Stagnant Science? Systematic Review, Meta-Regression and Cumulative Analysis of Audit and Feedback Interventions in Health Care  

Science Journals Connector (OSTI)

This paper extends the findings of the Cochrane systematic review of audit and feedback on professional practice to explore the estimate of effect over time and examine whether new trials have added to knowled...

Noah M. Ivers MD; PhD; Jeremy M. Grimshaw PhD…

2014-11-01T23:59:59.000Z

427

Systematic errors in the measurement of neutrino masses due to baryonic feedback processes: Prospects for stage IV lensing surveys  

E-Print Network (OSTI)

We examine the importance of baryonic feedback effects on the matter power spectrum on small scales, and the implications for the precise measurement of neutrino masses through gravitational weak lensing. Planned large galaxy surveys such as the Large Synoptic Sky Telescope (LSST) and Euclid are expected to measure the sum of neutrino masses to extremely high precision, sufficient to detect non-zero neutrino masses even in the minimal mass normal hierarchy. We show that weak lensing of galaxies while being a very good probe of neutrino masses, is extremely sensitive to baryonic feedback processes. We use publicly available results from the Overwhelmingly Large Simulations (OWLS) project to investigate the effects of active galactic nuclei feedback, the nature of the stellar initial mass function, and gas cooling rates, on the measured weak lensing shear power spectrum. Using the Fisher matrix formalism and priors from CMB+BAO data, we show that when one does not account for feedback, the measured neutrino mas...

Natarajan, Aravind; Battaglia, Nicholas; Trac, Hy

2014-01-01T23:59:59.000Z

428

Mechanical & Industrial Engineering  

E-Print Network (OSTI)

Mechanical & Industrial Engineering Mario A. Rotea Professor and Department Head #12;2Mechanical & Industrial Engineering Outline · Undergraduate Degree Programs · Graduate Degree Programs · The Faculty · The Research · Summary #12;3Mechanical & Industrial Engineering Undergraduate Programs ­ BSME & BSIE 0 20 40 60

Mountziaris, T. J.

429

Mechanical engineering Department Seminar  

E-Print Network (OSTI)

Mechanical engineering Department Seminar Shuodao Wang Postdoctoral Fellow University of Illinois, Urbana-Champaign Mechanical Design and Fabrication Techniques for Bio-Electronic Systems 11:00 AM Friday that bridge this gap in mechanics and form will create new opportunities in bio-inspired and bio

Lin, Xi

430

Mechanical and Aerospace Engineering  

E-Print Network (OSTI)

Mechanical and Aerospace Engineering Abstract Solid materials used in energy conversion and storage that couples the mechanical and chemical (or electrochemical) fields in solids via the use of stress-chemo- mechanical theory, two examples of practical interest will be discussed, namely, solid oxide fuel cells

431

Mechanical engineering Department Seminar  

E-Print Network (OSTI)

Mechanical engineering Department Seminar Maureen Lynch Postdoctoral Fellow Cornell University Mechanical Loading Decreases Osteolysis and Tumor Formation via Effects on Bone Remodeling 11:00 AM Friday to mechanical stimuli in the skeleton, yet the role of biomechanical loading remains poorly characterized

Lin, Xi

432

Victor Yakhot Mechanical Engineering  

E-Print Network (OSTI)

to flows of strongly non-linear fluids relevant for mechanical engineering, polymers and bio-fluid dynamicsVictor Yakhot Mechanical Engineering UniversalReynoldsNumberofTransition,Renormalizationand Mechanical Engineering 11 AM Friday, October 31st Room 245, 110 Cummington Mall Refreshments served at 10

Lin, Xi

433

SuperB Bunch-By-Bunch Feedback R&D  

SciTech Connect

The SuperB project has the goal to build in Italy, in the Frascati or Tor Vergata area, an asymmetric e{sup +}/e{sup -} Super Flavor Factory to achieve a peak luminosity > 10**36 cm{sup -2} s{sup -1}. The SuperB design is based on collisions with extremely low vertical emittance beams and high beam currents. A source of emittance growth comes from the bunch by bunch feedback systems producing high power correction signals to damp the beams. To limit any undesirable effect, a large R&D program is in progress, partially funded by the INFN Fifth National Scientific Committee through the SFEED (SuperB Feedback) project approved within the 2010 budget. The SuperB project [1] has the goal to build in Italy, in the Frascati or Tor Vergata area, an asymmetric e{sup +}/e{sup -} Super Flavor Factory to achieve a peak luminosity > 10**36 cm{sup -2} s{sup -1}. In the last and current years, the machine layout has been deeply modified, in particular the main rings are now shorter and an option with high currents has been foreseen. In the fig.1 the new SuperB layout is shown. From bunch-by-bunch feedback point of view, the simultaneous presence in the machine parameters, of very low emittance, of the order of 5-10 pm in the vertical plane, and very high currents, at level of 4 Ampere for the Low Energy Ring, asks for designing very carefully the bunch-by-bunch feedback systems. The parameter list is presented in Fig. 2. The bunch-by-bunch feedback design must take care of the risky and exciting challenges proposed in the SuperB specifications, but it should consider also some other important aspects: flexibility in terms of being able to cope to unexpected beam behaviours [2], [3] legacy of previous version experience [4], [5] and internal powerful diagnostics [6] as in the systems previously used in PEP-II and DAFNE [7].

Drago, A.; Beretta, M.; /Frascati; Bertsche, K.; Novokhatski, A.; /SLAC; Migliorati, M.; /Rome U.

2011-08-12T23:59:59.000Z

434

Mechanical seal assembly  

DOE Patents (OSTI)

An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transferring it to the mechanical diode.

Kotlyar, Oleg M. (Salt Lake City, UT)

2001-01-01T23:59:59.000Z

435

Mechanical seal assembly  

DOE Patents (OSTI)

An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transfering it to the mechanical diode.

Kotlyar, Oleg M. (Salt Lake City, UT)

2002-01-01T23:59:59.000Z

436

Cooling Flows as a Calorimeter of AGN Mechanical Power  

E-Print Network (OSTI)

The assumption that radiative cooling of gas in the centers of galaxy clusters is approximately balanced by energy input from a central supermassive black hole implies that the observed X-ray luminosity of the cooling flow region sets a lower limit on AGN mechanical power. The conversion efficiency of AGN mechanical power into gas heating is uncertain, but we argue that it can be high even in the absence of strong shocks. These arguments inevitably lead to the conclusion that the time averaged mechanical power of AGNs in cooling flows is much higher than the presently observed bolometric luminosity of these objects. The energy balance between cooling losses and AGN mechanical power requires some feedback mechanism. We consider a toy model in which the accretion rate onto a black hole is set by the classic Bondi formula. Application of this model to the best studied case of M87 suggests that accretion proceeds at approximately the Bondi rate down to a few gravitational radii with most of the power (at the level of a few percent of the rest mass) carried away by an outflow.

E. Churazov; R. Sunyaev; W. Forman; H. Boehringer

2002-01-09T23:59:59.000Z

437

Mechanical Properties of Nanocrystal Supercrystals  

E-Print Network (OSTI)

and Its Impact on Mechanical Properties. MacromoleculesO. L. ; Minor, A. M. , Mechanical annealing and source-Mechanical Properties of Nanocrystal Supercrystals Enrico

Tam, Enrico

2010-01-01T23:59:59.000Z

438

Mechanics of Funding matrix  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

FUNDING MECHANISMS FUNDING MECHANISMS Funding Mechanism Advantages Disadvantages Comments 1. From Doe to regional organizations * * Facilitates a broad, regional approach to planning and implementation that enhances consistency and uniformity * * Especially beneficial for new programs where early planning is needed * * Simplifies communication for DOE to have only one point of contact for information and discussion * * Cooperative agreement mechanism has proven relatively simple to administer * * Approach would require modification for Tribes * * Would also require that funding be provided to individual States to enable them to participate in the process, since planning authority and responsibility rests with the individual State * * Differs from OCRWM approach to 180(c) funding * * Introduces another layer of

439

Technology Partnering Mechanisms  

NLE Websites -- All DOE Office Websites (Extended Search)

expand a business with INL technologies, or require business support our Technology Transfer team is available to discuss the following contractual mechanisms: Cooperative...

440

CONSTRAINING STELLAR FEEDBACK: SHOCK-IONIZED GAS IN NEARBY STARBURST GALAXIES  

SciTech Connect

We investigate the properties of feedback-driven shocks in eight nearby starburst galaxies using narrow-band imaging data from the Hubble Space Telescope. We identify the shock-ionized component via the line diagnostic diagram [O III] (?5007)/H? versus [S II] (??6716, 6731) (or [N II] (?6583))/H?, applied to resolved regions 3-15 pc in size. We divide our sample into three sub-samples: sub-solar, solar, and super-solar, for consistent shock measurements. For the sub-solar sub-sample, we derive three scaling relations: (1) L{sub shock}?SFR{sup 0.62}, (2) L{sub shock}??{sub SFR,{sub HL}} {sup 0.92}, and (3) L{sub shock}/L{sub tot}?(L{sub H} /L{sub ?,{sub H}}){sup –0.65}, where L{sub shock} is the H? luminosity from shock-ionized gas, ?{sub SFR,{sub HL}} the star formation rate (SFR) per unit half-light area, L{sub tot} the total H? luminosity, and L{sub H} /L{sub ?,{sub H}} the absolute H-band luminosity from the Two Micron All Sky Survey normalized to solar luminosity. The other two sub-samples do not have enough number statistics, but appear to follow the first scaling relation. The energy recovered indicates that the shocks from stellar feedback in our sample galaxies are fully radiative. If the scaling relations are applicable in general to stellar feedback, our results are similar to those by Hopkins et al. for galactic superwinds. This similarity should, however, be taken with caution at this point, as the underlying physics that enables the transition from radiative shocks to gas outflows in galaxies is still poorly understood.

Hong, Sungryong; Calzetti, Daniela [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Gallagher, John S. III [Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53706 (United States); Martin, Crystal L. [Physics Department, University of California, Santa Barbara, CA 93106-9530 (United States); Conselice, Christopher J. [University of Nottingham, School of Physics and Astronomy, Nottingham NG7 2RD (United Kingdom); Pellerin, Anne [Department of Physics and Astronomy, Texas A and M University, 4242 TAMU, College Station, TX 77843-4242 (United States)

2013-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

High-Precision Test of Landauer’s Principle in a Feedback Trap  

Science Journals Connector (OSTI)

We confirm Landauer’s 1961 hypothesis that reducing the number of possible macroscopic states in a system by a factor of 2 requires work of at least kTln2. Our experiment uses a colloidal particle in a time-dependent, virtual potential created by a feedback trap to implement Landauer’s erasure operation. In a control experiment, similar manipulations that do not reduce the number of system states can be done reversibly. Erasing information thus requires work. In individual cycles, the work to erase can be below the Landauer limit, consistent with the Jarzynski equality.

Yonggun Jun; Mom?ilo Gavrilov; John Bechhoefer

2014-11-04T23:59:59.000Z

442

Outflow Feedback Regulated Massive Star Formation in Parsec-Scale Cluster Forming Clumps  

SciTech Connect

We investigate massive star formation in turbulent, magnetized, parsec-scale clumps of molecular clouds including protostellar outflow feedback using three dimensional numerical simulations of effective resolution 2048{sup 3}. The calculations are carried out using a block structured adaptive mesh refinement code that solves the ideal MHD equations including self-gravity and implements accreting sink particles. We find that, in the absence of regulation by magnetic fields and outflow feedback, massive stars form readily in a turbulent, moderately condensed clump of {approx} 1,600 M{sub {circle_dot}} (containing {approx} 10{sup 2} initial Jeans masses), along with a cluster of hundreds of lower mass stars. The massive stars are fed at high rates by (1) transient dense filaments produced by large-scale turbulent compression at early times, and (2) by the clump-wide global collapse resulting from turbulence decay at late times. In both cases, the bulk of the massive star's mass is supplied from outside a 0.1 pc-sized 'core' that surrounds the star. In our simulation, the massive star is clump-fed rather than core-fed. The need for large-scale feeding makes the massive star formation prone to regulation by outflow feedback, which directly opposes the feeding processes. The outflows reduce the mass accretion rates onto the massive stars by breaking up the dense filaments that feed the massive star formation at early times, and by collectively slowing down the global collapse that fuel the massive star formation at late times. The latter is aided by a moderate magnetic field of strength in the observed range (corresponding to a dimensionless clump mass-to-flux ratio {lambda} {approx} a few); the field allows the outflow momenta to be deposited more efficiently inside the clump. We conclude that the massive star formation in our simulated turbulent, magnetized, parsec-scale clump is outflow-regulated and clump-fed (ORCF for short). An important implication is that the formation of low-mass stars in a dense clump can affect the formation of massive stars in the same clump, through their outflow feedback on the clump dynamics. In a companion paper, we discuss the properties of the lower mass cluster members formed along with the massive stars, including their mass distribution and spatial clustering.

Wang, Peng; /KIPAC, Menlo Park /Stanford U., Phys.Dept.; Li, Zhi-Yun; /Virginia U., Astron. Dept.; Abel, Tom; /KIPAC, Menlo Park /Stanford U., Phys.Dept.; Nakamura, Fumitaka; /Niigata U.

2010-02-15T23:59:59.000Z

443

Near minimum-time maneuvers of large space structures using parameter optimization and lyapunov feedback control  

E-Print Network (OSTI)

Thruster Set Location, Saturation Thrust, and Positive Voltage Thrust Direction Thruster Manufacture 7 (1-2) 8 (3-4) 9 (5-6) 10 (7-8) Node ? 327 325 321 323 427 437 324 322 328 326 (m) -1. 35 1. 35 1. 35 -1. 35 -2. 82649 2. 82649...NEAR MINIMUM-TIME MANEUVERS OF LARGE SPACE STRUCTURES USING PARAMETER OPTIMIZATION AND LYAPUNOV FEEDBACK CONTROL A Thesis by IvtlCHAEL TIMOTHY CARTER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

Carter, Michael Timothy

2012-06-07T23:59:59.000Z

444

Boston University Department of Mechanical Engineering ME 303 Fluid Mechanics  

E-Print Network (OSTI)

Boston University Department of Mechanical Engineering ME 303 ­ Fluid Mechanics Fall 2011 Class: EK301 Engineering Mechanics Course Textbook: Fundamentals of Fluid Mechanics, 6th ed., Munson B. Reference Texts: Fluid Mechanics, Landau and Lifshitz, Vol. 6 Fluid Mechanics, Y. Cengel and J. Cimbala

445

Performance characteristics of positive and negative delayed feedback on chaotic dynamics of directly modulated InGaAsP semiconductor lasers  

E-Print Network (OSTI)

The chaotic dynamics of directly modulated semiconductor lasers with delayed optoelectronic feedback is studied numerically. The effects of positive and negative delayed optoelectronic feedback in producing chaotic outputs from such lasers with nonlinear gain reduction in its optimum value range is investigated using bifurcation diagrams. The results are confirmed by calculating the Lyapunov exponents. A negative delayed optoelectronic feedback configuration is found to be more effective in inducing chaotic dynamics to such systems with nonlinear gain reduction factor in the practical value range.

Bindu M. Krishna; Manu. P. John; V. M. Nandakumaran

2008-08-27T23:59:59.000Z

446

Mechanical & Aerospace Engineering  

E-Print Network (OSTI)

, and nuclear energy. She is a member of the American Society of Mechanical Engineers (ASME), Fluids EngineeringMechanical & Aerospace Engineering Interfacial flows are multi-material flows comprised of two of the interface between the fluids and the interface physics (like surface tension) needs to be predicted as part

447

MECHANICAL ENGINEERING Program of Study  

E-Print Network (OSTI)

MECHANICAL ENGINEERING Program of Study Correspondence The Department of Mechanical Engineering offers graduate programs in the fields of thermal science and engineering mechanics. Current areas of research activity include Biomedical Engineering, Biomimetics, Composite Materials, Computational Mechanics

Thomas, Andrew

448

Integrated Mechanical & Electrical Engineering (IMEE)  

E-Print Network (OSTI)

Integrated Mechanical & Electrical Engineering (IMEE) Department of Electronic & Electrical Engineering and Department of Mechanical Engineering #12;Graduates able to work in both mechanical of Mechanical Engineers (IMechE) n Develop essential engineering skills through extensive project work n Enhance

Burton, Geoffrey R.

449

Mechanical code comparator  

DOE Patents (OSTI)

A new class of mechanical code comparators is described which have broad potential for application in safety, surety, and security applications. These devices can be implemented as micro-scale electromechanical systems that isolate a secure or otherwise controlled device until an access code is entered. This access code is converted into a series of mechanical inputs to the mechanical code comparator, which compares the access code to a pre-input combination, entered previously into the mechanical code comparator by an operator at the system security control point. These devices provide extremely high levels of robust security. Being totally mechanical in operation, an access control system properly based on such devices cannot be circumvented by software attack alone.

Peter, Frank J. (Albuquerque, NM); Dalton, Larry J. (Bernalillo, NM); Plummer, David W. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

450

Fault localization and analysis in semiconductor devices with optical-feedback infrared confocal microscopy  

SciTech Connect

We report on a cost-effective optical setup for characterizing light-emitting semiconductor devices with optical-feedback confocal infrared microscopy and optical beam-induced resistance change.We utilize the focused beam from an infrared laser diode to induce local thermal resistance changes across the surface of a biased integrated circuit (IC) sample. Variations in the multiple current paths are mapped by scanning the IC across the focused beam. The high-contrast current maps allow accurate differentiation of the functional and defective sites, or the isolation of the surface-emittingp-i-n devices in the IC. Optical beam-induced current (OBIC) is not generated since the incident beam energy is lower than the bandgap energy of the p-i-n device. Inhomogeneous current distributions in the IC become apparent without the strong OBIC background. They are located at a diffraction-limited resolution by referencing the current maps against the confocal reflectance image that is simultaneously acquired via optical-feedback detection. Our technique permits the accurate identification of metal and semiconductor sites as well as the classification of different metallic structures according to thickness, composition, or spatial inhomogeneity.

Sarmiento, Raymund; Cemine, Vernon Julius; Tagaca, Imee Rose; Salvador, Arnel; Mar Blanca, Carlo; Saloma, Caesar

2007-11-01T23:59:59.000Z

451

Feedback, scatter and structure in the core of the PKS 0745-191 galaxy cluster  

E-Print Network (OSTI)

We present Chandra X-ray Observatory observations of the core of the galaxy cluster PKS 0745-191. Its centre shows X-ray cavities caused by AGN feedback and cold fronts with an associated spiral structure. The cavity energetics imply they are powerful enough to compensate for cooling. Despite the evidence for AGN feedback, the Chandra and XMM-RGS X-ray spectra are consistent with a few hundred solar masses per year cooling out of the X-ray phase, sufficient to power the emission line nebula. The coolest X-ray emitting gas and brightest nebula emission is offset by around 5 kpc from the radio and X-ray nucleus. Although the cluster has a regular appearance, its core shows density, temperature and pressure deviations over the inner 100 kpc, likely associated with the cold fronts. After correcting for ellipticity and projection effects, we estimate density fluctuations of ~4 per cent, while temperature, pressure and entropy have variations of 10-12 per cent. We describe a new code, MBPROJ, able to accurately obt...

Sanders, J S; Hlavacek-Larrondo, J; Russell, H R; Taylor, G B; Hofmann, F; Tremblay, G; Walker, S A

2014-01-01T23:59:59.000Z

452

Rotary mechanical latch  

DOE Patents (OSTI)

A rotary mechanical latch for positive latching and unlatching of a rotary device with a latchable rotating assembly having a latching gear that can be driven to latched and unlatched states by a drive mechanism such as an electric motor. A cam arm affixed to the latching gear interfaces with leading and trailing latch cams affixed to a flange within the drive mechanism. The interaction of the cam arm with leading and trailing latch cams prevents rotation of the rotating assembly by external forces such as those due to vibration or tampering.

Spletzer, Barry L.; Martinez, Michael A.; Marron, Lisa C.

2012-11-13T23:59:59.000Z

453

Developmental programming: Impact of prenatal exposure to bisphenol-A and methoxychlor on steroid feedbacks in sheep  

SciTech Connect

Bisphenol-A (BPA), a polymer used in plastics manufacturing, and methoxychlor (MXC), a pesticide, are endocrine disrupting compounds with estrogenic and anti-androgenic properties. Prenatal BPA or MXC treatment induces reproductive defects in sheep with BPA causing prepubertal luteinizing hormone (LH) hypersecretion and dampening of periovulatory LH surges and MXC lengthening follicular phase and delaying the LH surge. In this study, we addressed the underlying neuroendocrine defects by testing the following hypotheses: 1) prenatal BPA, but not MXC reduces sensitivity to estradiol and progesterone negative feedback, 2) prenatal BPA, but not MXC increases pituitary responsiveness to gonadotropin releasing hormone (GnRH), and 3) prenatal BPA dampens LH surge response to estradiol positive feedback challenge while prenatal MXC delays the timing of the LH surge. Pregnant sheep were treated with either 1) 5 mg/kg/day BPA (produces approximately twice the level found in human circulation, n = 8), 2) 5 mg/kg/day MXC (the lowest observed effect level stated in the EPA National Toxicology Program's Report; n = 6), or 3) vehicle (cotton seed oil: C: n = 6) from days 30 to 90 of gestation. Female offspring of these ewes were ovariectomized at 21 months of age and tested for progesterone negative, estradiol negative, estradiol positive feedback sensitivities and pituitary responsiveness to GnRH. Results revealed that sensitivity to all 3 feedbacks as well as pituitary responsiveness to GnRH were not altered by either of the prenatal treatments. These findings suggest that the postpubertal reproductive defects seen in these animals may have stemmed from ovarian defects and the steroidal signals emanating from them. - Highlights: ? Prenatal BPA/MXC does not affect reproductive neuroendocrine steroid feedbacks. ? Prenatal BPA or MXC treatment failed to alter pituitary sensitivity to GnRH. ? LH excess in BPA-treated sheep may be due to reduced ovarian feedback signals.

Abi Salloum, Bachir; Steckler, Teresa L.; Herkimer, Carol; Lee, James S. [Department of Pediatrics, University of Michigan, Ann Arbor, MI 48109 (United States); Padmanabhan, Vasantha, E-mail: vasantha@umich.edu [Department of Pediatrics, University of Michigan, Ann Arbor, MI 48109 (United States); The Reproductive Sciences Program, University of Michigan, Ann Arbor, MI 48109 (United States)

2013-05-01T23:59:59.000Z

454

Counter Current Multiplier Mechanism  

NLE Websites -- All DOE Office Websites (Extended Search)

Counter Current Multiplier Mechanism Counter Current Multiplier Mechanism Name: Stephen Location: N/A Country: N/A Date: N/A Question: Can you please explain to me the counter-current multiplier mechanism. I understand that cholride and sodium ions are filtered out of the ascending loop of Henle into the interstial fluid, however, I'm not sure exactly what happens from there and how this effects osmotic pressure gradients in the nephron. Any help would be greatly appriciated. Replies: This mechanism is very complex when it comes to writing a response. You have to have a strong background in osmotic pressure understanding and the anatomy of the kidney. It involves the cortex, outer and inner medula in relationship to the vasa recta, interstitial fluids at two points, the loop of Henle and the collecting duct. The size of the tubes and the position in relations to the cortex and medulla is an essential part. I can suggest some references.

455

Contaminant-Generation Mechanisms  

Science Journals Connector (OSTI)

In the last chapter, the areas where contaminants are generated were discussed. Knowing the location of contaminant generation is helpful in controlling that contamination, but understanding the mechanisms is ...

Alvin Lieberman

1992-01-01T23:59:59.000Z

456

Mechanical & Aerospace Engineering  

E-Print Network (OSTI)

Mechanical & Aerospace Engineering This presentation will address the development and transition of advanced structural health management (SHM) technologies from the perspective of understanding and the importance of understanding this role to increase the likelihood for transition of new technologies

457

Mechanical engineering Department Seminar  

E-Print Network (OSTI)

people trained from both perspectives can result in innovative solutions. At Fraunhofer CMI ­ coMechanical engineering Department Seminar Alexis Sauer-Budge Senior Research Scientist, Fraunhofer CMI Adjunct Research Assistant Professor, BME, Boston University Innovations at the intersection

458

Syngas Oxidation Mechanism  

Science Journals Connector (OSTI)

A comprehensive analysis of synthesis gas (syngas) oxidation kinetics in wide ranges of temperature ... on the basis of the reaction mechanism of syngas ignition and combustion in air. A vast set of experimental ...

A. M. Starik; N. S. Titova; A. S. Sharipov…

2010-09-01T23:59:59.000Z

459

Mechanical Compression Heat Pumps  

E-Print Network (OSTI)

MECHANICAL COMPRESSION HEAT PUMPS Thomas-L. Apaloo and K. Kawamura Mycom Corporation, Los Angeles, California J. Matsuda, Mayekawa Mfg. Co., Tokyo, Japan ABSTRACT Mechanical compression heat pumping is not new in industrial applications.... In fact, industry history suggests that the theoretical concept was developed before 1825. Heat pump manufacturers gained the support of consultants and end-users when the energy crisis hit this country in 1973. That interest, today, has been...

Apaloo, T. L.; Kawamura, K.; Matsuda, J.

460

Mechanical Engineering Is Mechanical Engineering right for me?  

E-Print Network (OSTI)

Mechanical Engineering Is Mechanical Engineering right for me? If you are interested in the wide range of principles related to mechanical systems then Mechanical Engineering is well suited to you. A Mechanical Engineering degree programme will focus on aspects such as analysis, design, manufacture

Harman, Neal.A.

Note: This page contains sample records for the topic "macroeconomic feedback mechanism" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Stability of autonomous systems The pole placement problem Stabilization by state feedback State observers Pole placement and Stability, Pole Placement, Observers and  

E-Print Network (OSTI)

Stability of autonomous systems The pole placement problem Stabilization by state feedback State University of Groningen Stability, Pole Placement, Observers and Stabilization #12;Stability of autonomous and Outline 1 Stability of autonomous systems 2 The pole placement problem 3 Stabilization by state feedback 4

Trentelman, Harry L.

462

Feedback" An Article for Smart Grid News The Smart Grid Transition-Getting Started  

NLE Websites -- All DOE Office Websites (Extended Search)

Sharing Smart Grid Experiences through Performance Sharing Smart Grid Experiences through Performance Feedback" An Article for Smart Grid News The Smart Grid Transition-Getting Started We are on the ground floor of a Smart Grid transition that is leading us out of a centralized, information- limited infrastructure into an intelligent, modernized electric system. Simply put, our aim is to achieve a smarter grid, one that is merged with ubiquitous information and communication technologies that support a balance of centralized and distributed resources of all kinds and the active engagement of its consumers. Since 2005, a great deal of work has been done to define the vision for the Smart Grid and to communicate that vision to stakeholders. As a result, understanding has increased and many

463

Output feedback control for robust tracking of position trajectories for DC electric motors  

Science Journals Connector (OSTI)

Abstract A generalized PI-like output feedback dynamic control scheme with additional integral compensation of the output error is proposed for robust tracking tasks of position reference trajectories for direct current electric motors with speed reduction gear head, using measurements of angular displacement only. The integral compensation is used to improve the robustness property of the controller, in regards to parametric uncertainty and variable load torque, and avoid the application of asymptotic estimation methods of the state vector. A family of Taylor polynomials approximates the perturbation signals, in order to reduce the control design complexity. These signals are compensated by the integral control action directly. Experimental and simulation results describe the effective performance of the control scheme proposed in this paper as an alternative solution to the efficient angular position control problem of direct current electric motors.

Francisco Beltran-Carbajal; Antonio Favela-Contreras; Antonio Valderrabano-Gonzalez; Julio Cesar Rosas-Caro

2014-01-01T23:59:59.000Z

464

Optical boundary reconstruction of tokamak plasmas for feedback control of plasma position and shape  

SciTech Connect

A new diagnostic is developed to reconstruct the plasma boundary using visible wavelength images. Exploiting the plasma's edge localized and toroidally symmetric emission profile, a new coordinate transform is presented to reconstruct the plasma boundary from a poloidal view image. The plasma boundary reconstruction is implemented in MATLAB and applied to camera images of Mega-Ampere Spherical Tokamak discharges. The optically reconstructed plasma boundaries are compared to magnetic reconstructions from the offline reconstruction code EFIT, showing very good qualitative and quantitative agreement. Average errors are within 2 cm and correlation is high. In the current software implementation, plasma boundary reconstruction from a single image takes 3 ms. The applicability and system requirements of the new optical boundary reconstruction, called OFIT, for use in both feedback control of plasma position and shape and in offline reconstruction tools are discussed.

Hommen, G.; Baar, M. de [Control Systems Technology Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven (Netherlands); FOM Institute for Plasma Physics ''Rijnhuizen'', Association EURATOM-FOM, Trilateral Euregio Cluster, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Nuij, P.; Steinbuch, M. [Control Systems Technology Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven (Netherlands); McArdle, G.; Akers, R. [EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom)

2010-11-15T23:59:59.000Z

465

High-resolution mapping of quantum efficiency of silicon photodiode via optical-feedback laser microthermography  

SciTech Connect

We map the external quantum efficiency (QE) distribution of a silicon photodiode (PD) sample via a thermographic imaging technique based on optical-feedback laser confocal microscopy. An image pair consisting of the confocal reflectance image and the 2D photocurrent map is simultaneously acquired to delineate the following regions of interest on the sample: the substrate, the n-type region, the pn overlay, and the bonding pad. The 2D QE distribution is derived from the photocurrent map to quantify the optical performance of these sites. The thermal integrity of the sample is then evaluated by deriving the rate of change of QE with temperature T at each point on the silicon PD. These gradient maps function not only as stringent measures of local thermal QE activity but they also expose probable defect locations on the sample at high spatial resolution - a capability that is not feasible with existing bulk measurement techniques.

Cemine, Vernon Julius; Blanca, Carlo Mar; Saloma, Caesar

2006-09-20T23:59:59.000Z

466

Quantitative feedback design of air and boost pressure control system for turbocharged diesel engines  

Science Journals Connector (OSTI)

For modern diesel engines, variable geometry turbocharger (VGT) is used to boost engine power output. In addition, exhaust gas recirculation (EGR) is utilized to reduce engine out \\{NOx\\} emission. To realize these functions, a multivariable control system needs to control both VGT and EGR valve to deliver desired intake manifold (or boost) pressure, and desired EGR flow rate. This two-input and two-output system is nonlinear with cross-couplings between the boost and EGR responses to the input actuators, the system parameters are varying with different engine operating conditions. This paper proposes a closed loop design of a multivariable VGT/EGR control system for a turbocharged diesel engine. The control system is synthesized based on quantitative feedback theory to maintain robust stability and performance via sequential MIMO loop shaping in the frequency domain. Experiment results are included from a turbocharged diesel engine to show the effectiveness of the proposed control design.

Yue-Yun Wang; Ibrahim Haskara; Oded Yaniv

2011-01-01T23:59:59.000Z

467

Measurements of the linewidth of a continuous-wave distributed feedback quantum cascade laser  

Science Journals Connector (OSTI)

Two-sample (Allan) variance with a modified algorithm was applied to the determination of the experimental linewidth of a thermoelectrically-cooled continuous-wave distributed feedback quantum cascade laser at a wavelength of 4.333 ?m. From successive laser transmittance scans over the CO2 ?3, (0111 ? 0110) P(33) absorption line at 2307.653 cm? 1, two-sample variances were calculated for the laser frequency difference between different points on the sides of the absorption peak. From the minimum two-sample variance of the laser frequency difference between two adjacent points (5 ?s between the points) on the same side of the absorption line the experimental laser linewidth was estimated to be less than 36(7) kHz at a laser power of ~ 25 mW, a laser current of 976 mA and a laser temperature of + 19.5 °C.

Vasili L. Kasyutich; Philip A. Martin

2011-01-01T23:59:59.000Z

468

Landscape Urbanization and Economic Growth in China: Positive Feedbacks and Sustainability Dilemmas  

Science Journals Connector (OSTI)

Our analysis shows that (1) larger cities, both in terms of population size and built-up area, and richer cities tend to gain more income, have larger built-up area expansion, and attract more population, than poorer cities or smaller cities; and (2) that there is a long-term bidirectional causality between urban built-up area expansion and GDP per capita at both city and provincial level, and a short-term bidirectional causality at provincial level, revealing a positive feedback between landscape urbanization and urban and regional economic growth in China. ... (55) This will inevitably increase demand for built-up areas for infrastructure, industry, and residential use. ... In addition to economic aspects, built-up area also reveals strong environmental linkages through concentration of materials,(61) and varying energy use and GHG emissions according to different urban density and transportation system. ...

Xuemei Bai; Jing Chen; Peijun Shi

2011-11-21T23:59:59.000Z

469

Interacting dark energy: the role of microscopic feedback in the dark sector  

E-Print Network (OSTI)

We investigate the impact on the classical dynamics of dark matter particles and dark energy of a non-minimal coupling in the dark sector, assuming that the mass of the dark matter particles is coupled to a dark energy scalar field. We show that standard results can only be recovered if the space-time variation of the dark energy scalar field is sufficiently smooth on the characteristic length scale of the dark matter particles, and we determine the associated constraint dependent on both the mass and radius of the dark matter particles and the coupling to the dark energy scalar field. We further show, using field theory numerical simulations, that a violation of such constraint results in a microscopic feedback effect strongly affecting the dynamics of dark matter particles, with a potential impact on structure formation and on the space-time evolution of the dark energy equation of state.

Avelino, P P

2015-01-01T23:59:59.000Z

470

PHYSICAL REVIEW E 83, 026203 (2011) Odd-number theorem: Optical feedback control at a subcritical Hopf bifurcation  

E-Print Network (OSTI)

PHYSICAL REVIEW E 83, 026203 (2011) Odd-number theorem: Optical feedback control at a subcritical; revised manuscript received 22 October 2010; published 14 February 2011) A subcritical Hopf bifurcation-positive Floquet multipliers, can- not be stabilized [5­9]. In particular, UPOs born in a subcritical Hopf

Wünsche, Hans-Jürgen "Ede"

471

Gq/5-HT2c receptor signals activate a local GABAergic inhibitory feedback circuit to modulate serotonergic  

E-Print Network (OSTI)

Gq/5-HT2c receptor signals activate a local GABAergic inhibitory feedback circuit to modulate serotonergic firing and anxiety in mice Katharina Spoidaa , Olivia A. Massecka , Evan S. Denerisb , and Stefan-Rs are expressed throughout the brain, making it difficult to link behavioral changes to circuit specific receptor

472

Robust UAV Coordination for Target Tracking using Output-Feedback Model Predictive Control with Moving Horizon Estimation  

E-Print Network (OSTI)

Robust UAV Coordination for Target Tracking using Output-Feedback Model Predictive Control consider the control of two UAVs tracking an evasive moving ground vehicle. The UAVs are small fixed to maintain visibility. The control inputs to the UAVs are computed based on noisy measurements of the UAVs

Hespanha, João Pedro

473

JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 15, NO. 4, AUGUST 2006 945 Using Feedback Control of Microflows to  

E-Print Network (OSTI)

, and Benjamin Shapiro, Member, IEEE Abstract--In this paper, we show how to combine microfluidics and feedback actuation. Manuscript received March 10, 2005; revised February 1, 2006. Subject Ed- itor C. Liu. M. D of Maryland, College Park, MD 20742 USA. B. Shapiro is with the Department of Aerospace Engineering

Shapiro, Benjamin

474

What People Do with Consumption Feedback: A Long-Term Living Lab Study of a Home Energy Management System  

Science Journals Connector (OSTI)

......Figure 10. Providing Energy Feedback on multiple...checked their current energy consumption before...commercial breaks. The integration of the HEMS into...important factor for sustainable use. To an extent...provides significant challenge to householders...monitoring of their energy usage in situations......

Tobias Schwartz; Gunnar Stevens; Timo Jakobi; Sebastian Denef; Leonardo Ramirez; Volker Wulf; Dave Randall

2014-04-01T23:59:59.000Z

475

On Maximum Available Feedback and PID Control -1 IEEE SMC UK&RI Applied Cybernetics Dr Richard Mitchell 2005  

E-Print Network (OSTI)

Feedback Tuning of Robust PID Controllers with Iso-Damping Property, IEEE Trans. SMC B Vol 35, 1, 23( K m 2 t m p + = i 2 ttp tpti d T)(s2 )(s2T T ++- = ))(s)(tan)(tan)(s( 2 T tp 2 tpt i

Mitchell, Richard

476

Real time ammonia detection in exhaled human breath using a distributed feedback quantum cascade laser based sensor  

E-Print Network (OSTI)

, thermoelectrically cooled, distributed feedback quantum cascade laser (DFB-QCL) based sensor platform concentration measurements are performed with a 2f wavelength modulation quartz enhanced photoacoustic exchange inside a compact QEPAS gas cell. An air-cooled DFB-QCL was designed to target the interference

477

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 7, NO. 5, MAY 2008 1823 Opportunistic Cooperative Diversity with Feedback and Cheap Radios  

E-Print Network (OSTI)

orthogonal transmissions. We analyze the performance of a class of opportunistic relaying protocols that employ simple packet level feedback and strictly orthogonal transmissions. It is shown that the diversity transmissions from distributed terminals continue to attract considerable interest especially in studies

478

Evaluating the Effect of Feedback from a CSCL Problem Solving Environment on Learning, Interaction, and Perceived Interdependence  

E-Print Network (OSTI)

fraction arithmetic as a unit of material because of its importance and difficulty for middle school Feedback). While our conclusions remain tentative due to the small sample size, the data reveal the participants to consider questions that might not have occurred to them otherwise. This stimulus could cause

Rose, Carolyn Penstein

479

MECHANICAL ENGINEERING UNDERGRADUATE HONORS THESIS  

E-Print Network (OSTI)

, when two bound copies are to be submitted to the Mechanical Engineering Services Office #12;PLEASE Mechanical Engineering Student Services: ¨ Application Approved ¨ Application Denied Signature of UGMECHANICAL ENGINEERING UNDERGRADUATE HONORS THESIS The Department of Mechanical Engineering

Prinz, Friedrich B.

480

STANFORD UNIVERSITY MECHANICAL ENGINEERING DEPARTMENT  

E-Print Network (OSTI)

20062007 Mechanical Engineering Student Services Building 530, Room 125 (650) 7257695 FAX (650) 7234882STANFORD UNIVERSITY MECHANICAL ENGINEERING DEPARTMENT GRADUATE STUDENT HANDBOOK Academic Year Revised 9/06 #12;MECHANICAL ENGINEERING GRADUATE STUDENT HANDBOOK 20062007 TABLE OF CONTENTS (Clickable

Prinz, Friedrich B.

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481

Mechanical Behavior of Indium Nanostructures  

NLE Websites -- All DOE Office Websites (Extended Search)

Mechanical Behavior of Indium Nanostructures Mechanical Behavior of Indium Nanostructures Print Wednesday, 26 May 2010 00:00 Indium is a key material in lead-free solder...

482

Acoustic hemostasis: Underlying mechanisms  

Science Journals Connector (OSTI)

Cessation of hemorrhage using extrinsic interventional methods is possible with delivery of energy to bleeding tissues i.e. cauterization. High intensity focused ultrasound (HIFU) is one such method with significant advantages of delivering high levels of energy to well?defined regions of deep?seated tissues even during profuse bleeding. The physical mechanisms involved in this process include thermal and mechanical effects of HIFU leading to various biological effects. Our results using HIFU devices of 1–5 MHz and focal derated intensities of 1 000–10 000 W/cm2 in solid organs such as liver spleen and kidneys and major and minor blood vessels show that temperature of targeted tissues reaches 70–100°C within seconds with formation of microbubbles approximately 5??200 ? in size and concentration of 100 bubbles/mm3. It appears that boiling of interstitial fluids and blood and acoustic cavitation are both involved. The biological effects include coagulative necrosis mechanical disruption of tissue structure potentially leading to release of tissue factors enhancing the coagulation coagulum and thrombus formation at a wound site tissue fusion via collagen and elastin remodeling and fibrin plug formation with minimal damage of the surrounding tissues. These mechanisms appear to provide an effective and safe method of hemorrhage control. [Work supported by NIH DoD NSBRI.

Shahram Vaezy; Lawrence Crum; Steve Carter; Grant O’Keefe; Vesna Zderic; Roy Martin; Riyad Karmy?Jones

2007-01-01T23:59:59.000Z

483

Thermodynamics and statistical mechanics  

Science Journals Connector (OSTI)

... IN this book, Professor Landsberg brings together thermodynamics and statistical mechanics to provide a coherent account of these interrelated branches of physical theory ... side usually result in the essential structures of both becoming obscured. The value of classical thermodynamics lies in what it can do without invoking microscopic models and it is best learnt ...

C.J. Adkins

1979-12-20T23:59:59.000Z

484

Residential Mechanical Precooling  

SciTech Connect

This research conducted by the Alliance for Residential Building Innovation team evaluated mechanical air conditioner pre-cooling strategies in homes throughout the United States. EnergyPlus modeling evaluated two homes with different performance characteristics in seven climates. Results are applicable to new construction homes and most existing homes built in the last 10 years, as well as fairly efficient retrofitted homes.

German, A.; Hoeschele, M.

2014-12-01T23:59:59.000Z

485

Department of Mechanical Engineering "From Compliant Mechanisms to  

E-Print Network (OSTI)

such as 3D printing with materials specialized in electro- mechanical sensing and actuation in addition

Militzer, Burkhard

486

Program Transformation Mechanics A Classification of Mechanisms for Program Transformation  

E-Print Network (OSTI)

Program Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing Transformation Systems Jonne van Wijngaarden Eelco Visser UU-CS-2003-048 Institute Transformation Mechanics A Classification of Mechanisms for Program Transformation with a Survey of Existing

Utrecht, Universiteit

487

MECHANICAL ENGINEERING 121 Department of Mechanical Engineering (MEE)  

E-Print Network (OSTI)

MECHANICAL ENGINEERING 121 Department of Mechanical Engineering (MEE) *Available for general education credit. The Department of Mechanical Engineering offers an upper- division curriculum which leads to a B.S. in mechanical engineering. The curriculum is based on a strong foundation of fundamental

Kostic, Milivoje M.

488

Mechanical engineering Mechanical engineering is about solving problems, designing processes,  

E-Print Network (OSTI)

Mechanical engineering Mechanical engineering is about solving problems, designing processes, and making products to improve the quality of human life and shape the economy. Mechanical engineers apply the principles of physics, mathematics, computing and practical skills to design mechanical systems and artefacts

Waikato, University of

489

114 MECHANICAL ENGINEERING Department of Mechanical Engineering (MEE)  

E-Print Network (OSTI)

114 MECHANICAL ENGINEERING Department of Mechanical Engineering (MEE) *Available for general education credit. The Department of Mechanical Engineering offers an upper- division curriculum which leads to a B.S. in mechanical engineering. The curriculum is based on a strong foundation of fundamental

Kostic, Milivoje M.

490

Mechanical Engineering Department Seminar Series  

E-Print Network (OSTI)

Mechanical Engineering Department Seminar Series Rational Mechanics of Viral Shells: Is Continuum Theory a Stretch? William S. Klug Associate Professor, Mechanical & Aerospace Engineering, University-assembly. The capacity of these shells to respond structurally and mechanically to physical and chemical stimuli also

Eustice, Ryan

491

07SCHOOL OF MECHANICAL ENGINEERING  

E-Print Network (OSTI)

, mechanical with nuclear engineering, and medical engineering. Engineers qualified in all these areas play MECHANICAL ENGINEERING MECHANICAL WITH NUCLEAR ENGINEERING MEDICAL ENGINEERING OTHER COURSES TO CONSIDER Entryrequirementsandhowtoapply Modules MedicalEngineering(MEng,BEng) MechanicalwithNuclearEngineering(MEng,BEng) MechanicalEngineering

Dimitrova, Vania

492

Computational modelling of Smad-mediated negative feedback and crosstalk in the TGF-? superfamily network  

Science Journals Connector (OSTI)

...extracellular matrix and at a constant...mechanism for this process is not fully...concentration in all simulations, there is...shuttling processes, along the...mechanism of this process is not fully...differential equations (ODEs) shown...routine in Matlab 7.12 (The...we fit the simulation results to...

2013-01-01T23:59:59.000Z

493

Mechanical Operations and Maintenance  

NLE Websites -- All DOE Office Websites (Extended Search)

Holiday Work Status Holiday Work Status Mechanical Operations & Maintenance Group APS Storage Ring Magnets The Advanced Photon Source (APS) at the Argonne National Laboratory is a national synchrotron-radiation research facility funded by the U.S. Department of Energy. Using high-brilliance x-ray beams from the APS, an international community of scientists conducts forefront basic and applied research in the fields of material science, biological science, physics, chemistry, environmental, geophysical and planetary science. The 1.1-km circumference APS facility consists of several major subsystems including magnets, vacuum chambers, radio-frequency cavities, diagnostics instrumentation, x-ray absorbers and apertures, and cooling water subsystems. Each of these subsystems contains hundreds of mechanical

494

Mechanics of collective unfolding  

E-Print Network (OSTI)

Mechanically induced unfolding of passive crosslinkers is a fundamental biological phenomenon encountered across the scales from individual macro-molecules to cytoskeletal actin networks. In this paper we study a conceptual model of athermal load-induced unfolding and use a minimalistic setting allowing one to emphasize the role of long-range interactions while maintaining full analytical transparency. Our model can be viewed as a description of a parallel bundle of N bistable units confined between two shared rigid backbones that are loaded through a series spring. We show that the ground states in this model correspond to synchronized, single phase configurations where all individual units are either folded or unfolded. We then study the fine structure of the wiggly energy landscape along the reaction coordinate linking the two coherent states and describing the optimal mechanism of cooperative unfolding. Quite remarkably, our study shows the fundamental difference in the size and structure of the folding-u...

Caruel, M; Truskinovsky, L

2015-01-01T23:59:59.000Z

495

Time in quantum mechanics  

E-Print Network (OSTI)

OF CONTENTS I. INTRODUCTION II. HISTORICAL DEVELOPMENT A. Classical Mechanics B. Quantum Theory . C. The Problem 3 4 6 III. TIME ATOMS AND DISCRETE TIME A. The Earliest Applications of Atomistic and Discrete Time . . . . . B. The Radiating Electron... . C. Quantum Field Theory 8 10 l2 IV. TIME OPERATOR FORMULATIONS 16 A. Advocates Against a Time Operator . B. The Possibility of a Time Operator C, Advocates in Favor of a Time Operator D. A Restricted Time Delay Operator: Scattering Theory...

Chapin, Kimberly R.

2012-06-07T23:59:59.000Z

496

Relativistic viscoelastic fluid mechanics  

SciTech Connect

A detailed study is carried out for the relativistic theory of viscoelasticity which was recently constructed on the basis of Onsager's linear nonequilibrium thermodynamics. After rederiving the theory using a local argument with the entropy current, we show that this theory universally reduces to the standard relativistic Navier-Stokes fluid mechanics in the long time limit. Since effects of elasticity are taken into account, the dynamics at short time scales is modified from that given by the Navier-Stokes equations, so that acausal problems intrinsic to relativistic Navier-Stokes fluids are significantly remedied. We in particular show that the wave equations for the propagation of disturbance around a hydrostatic equilibrium in Minkowski space-time become symmetric hyperbolic for some range of parameters, so that the model is free of acausality problems. This observation suggests that the relativistic viscoelastic model with such parameters can be regarded as a causal completion of relativistic Navier-Stokes fluid mechanics. By adjusting parameters to various values, this theory can treat a wide variety of materials including elastic materials, Maxwell materials, Kelvin-Voigt materials, and (a nonlinearly generalized version of) simplified Israel-Stewart fluids, and thus we expect the theory to be the most universal description of single-component relativistic continuum materials. We also show that the presence of strains and the corresponding change in temperature are naturally unified through the Tolman law in a generally covariant description of continuum mechanics.

Fukuma, Masafumi; Sakatani, Yuho [Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)

2011-08-15T23:59:59.000Z

497

Galactic outflow and diffuse gas properties at z>=1 using different baryonic feedback models  

E-Print Network (OSTI)

We measure and quantify properties of galactic outflows and diffuse gas at $z \\geq 1$ in cosmological hydrodynamical simulations. Our novel sub-resolution model, MUPPI, implements supernova feedback using fully local gas properties, where the wind velocity and mass loading are not given as input. We find the following trends at $z = 2$ by analysing central galaxies having a stellar mass higher than $10^{9} M_{\\odot}$. The outflow velocity and mass outflow rate ($\\dot{M}_{\\rm out}$) exhibit positive correlations with galaxy mass and with the star formation rate (SFR). However, most of the relations present a large scatter. The outflow mass loading factor ($\\eta$) is between $0.2 - 10$. The comparison Effective model generates a constant outflow velocity, and a negative correlation of $\\eta$ with halo mass. The number fraction of galaxies where outflow is detected decreases at lower redshifts, but remains more than $80 \\%$ over $z = 1 - 5$. High SF activity at $z \\sim 2 - 4$ drives strong outflows, causing the ...

Barai, Paramita; Murante, Giuseppe; Ragagnin, Antonio; Viel, Matteo

2014-01-01T23:59:59.000Z

498

MMTF DISCOVERY OF GIANT IONIZATION CONES IN MR 2251-178: IMPLICATIONS FOR QUASAR RADIATIVE FEEDBACK  

SciTech Connect

We report the discovery of giant ionization cones in the 140 kpc nebula around quasar MR 2251-178 based on deep [O III] {lambda}5007/H{beta} and [N II] {lambda}6583/H{alpha} flux ratio maps obtained with the Maryland-Magellan Tunable Filter on the Baade-Magellan 6.5 m Telescope. These cones are aligned with the weak double-lobed radio source observed on smaller scale (<30 kpc). They have an opening angle {approx}120 Degree-Sign {+-} 10 Degree-Sign and subtend {approx}65%-90% of 4{pi} sr, where the uncertainty takes into account possible projection effects. The material in the outer ionization cones is matter-bounded, indicating that all ionizing photons emitted through the cones escape from the system. The quasar ionizing flux is {approx}2-3 times fainter outside of these cones, despite the largely symmetric geometry of the nebula in [O III]. Overall, adding up the contributions from both inside and outside the cones, we find that {approx}65%-95% of the quasar ionizing radiation makes its way out of the system. These results emphasize the need for line ratio maps to quantify the escape fraction of ionizing radiation from quasars and the importance of quasar radiative feedback on the intergalactic medium.

Kreimeyer, Kory; Veilleux, Sylvain, E-mail: kory@astro.umd.edu, E-mail: veilleux@astro.umd.edu [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States)

2013-07-20T23:59:59.000Z

499

Neutron Production from Feedback Controlled Thermal Cycling of a Pyroelectric Crystal Stack  

SciTech Connect

The LLNL Crystal Driven Neutron Source is operational and has produced record ion currents of {approx}10 nA and neutron output of 1.9 ({+-}0.3) x 10{sup 5} per thermal cycle using a crystal heating rate of 0.2 C/s from 10 C to 110 C. A 3 cm diameter by 1 cm thick LiTaO{sub 3} crystal with a socket secured field emitter tip is thermally cycled with feedback control for ionization and acceleration of deuterons onto a deuterated target to produce D-D fusion neutrons. The entire crystal and temperature system is mounted on a bellows which allows movement of the crystal along the beam axis and is completely contained on a single small vacuum flange. The modular crystal assembly permitted experimental flexibility. Operationally, flashover breakdowns along the side of the crystal and poor emitter tip characteristics can limit the neutron source. The experimental neutron results extend earlier published work by increasing the ion current and pulse length significantly to achieve a factor-of-two higher neutron output per thermal cycle. These findings are reviewed along with details of the instrument.

Tang, V; Meyer, G; Schmid, G; Spadaccini, C; Kerr, P; Rusnak, B; Sampayan, S; Naranjo, B; Putterman, S

2007-08-09T23:59:59.000Z

500

Neural network based approach for tuning of SNS feedback and feedforward controllers.  

SciTech Connect

The primary controllers in the SNS low level RF system are proportional-integral (PI) feedback controllers. To obtain the best performance of the linac control systems, approximately 91 individual PI controller gains should be optimally tuned. Tuning is time consuming and requires automation. In this paper, a neural network is used for the controller gain tuning. A neural network can approximate any continuous mapping through learning. In a sense, the cavity loop PI controller is a continuous mapping of the tracking error and its one-sample-delay inputs to the controller output. Also, monotonic cavity output with respect to its input makes knowing the detailed parameters of the cavity unnecessary. Hence the PI controller is a prime candidate for approximation through a neural network. Using mean square error minimization to train the neural network along with a continuous mapping of appropriate weights, optimally tuned PI controller gains can be determined. The same neural network approximation property is also applied to enhance the adaptive feedforward controller performance. This is done by adjusting the feedforward controller gains, forgetting factor, and learning ratio. Lastly, the automation of the tuning procedure data measurement, neural network training, tuning and loading the controller gain to the DSP is addressed.

Kwon, S. I. (Sung-Il); Prokop, M. S. (Mark S.); Regan, A. H. (Amy H.)

2002-01-01T23:59:59.000Z