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Sample records for lucas cioffi moderator

  1. 76 FR 66072 - Albert Ronald Cioffi: Debarment Order

    Science.gov (United States)

    2011-10-25

    ... DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration [Docket No. FDA-2011-N-0159] Albert Ronald Cioffi: Debarment Order AGENCY: Food and Drug Administration, HHS. ACTION: Notice. SUMMARY... Administration, 5630 Fishers Lane, rm. 1061, Rockville, MD 20852. FOR FURTHER INFORMATION CONTACT: Kenny Shade...

  2. Lucas Heights technology park

    International Nuclear Information System (INIS)

    1987-01-01

    The proposed Lucas Heights Technology Park will pound together the applied research programs of Government, tertiary and industry sectors, aiming to foster technology transfer particularly to the high-technology manufacturing industry. A description of the site is given along with an outline of the envisaged development, existing facilities and expertise. ills

  3. APTCARE - Lucas Heights

    International Nuclear Information System (INIS)

    1986-05-01

    This plan details command co-ordination and support responses of Commonwealth and State Authorities in the event of an accident with offsite consequences at the Lucas Heights Research Laboratories. The plan has been prepared by the AAEC Local Liaison Working Party, comprising representatives of the Australian Atomic Energy Commission, NSW Police Department, NSW Board of Fire Commissioners, NSW State Emergency Services and Civil Defence Organisation, NSW Department of Health, NSW Department of Environment and Planning and Sutherland Shire Council

  4. Physiology, phylogeny, and LUCA

    Directory of Open Access Journals (Sweden)

    William F. Martin

    2016-11-01

    Full Text Available Genomes record their own history. But if we want to look all the way back to life’s beginnings some 4 billion years ago, the record of microbial evolution that is preserved in prokaryotic genomes is not easy to read. Microbiology has a lot in common with geology in that regard. Geologists know that plate tectonics and erosion have erased much of the geological record, with ancient rocks being truly rare. The same is true of microbes. Lateral gene transfer (LGT and sequence divergence have erased much of the evolutionary record that was once written in genomes, and it is not obvious which genes among sequenced genomes are genuinely ancient. Which genes trace to the last universal ancestor, LUCA? The classical approach has been to look for genes that are universally distributed. Another approach is to make all trees for all genes, and sift out the trees where signals have been overwritten by LGT. What is left ought to be ancient. If we do that, what do we find?

  5. On primes in Lucas sequences

    Czech Academy of Sciences Publication Activity Database

    Křížek, Michal; Somer, L.

    2015-01-01

    Roč. 53, č. 1 (2015), s. 2-23 ISSN 0015-0517 R&D Projects: GA ČR GA14-02067S Institutional support: RVO:67985840 Keywords : Lucas sequence * primes Subject RIV: BA - General Mathematics http://www.fq.math.ca/Abstracts/53-1/somer.pdf

  6. Repdigits in k-Lucas sequences

    Indian Academy of Sciences (India)

    57(2) 2000 243-254) proved that 11 is the largest number with only one distinct digit (the so-called repdigit) in the sequence ( L n ( 2 ) ) n . In this paper, we address a similar problem in the family of -Lucas sequences. We also show that the -Lucas sequences have similar properties to those of -Fibonacci sequences ...

  7. The taking of Lucas Heights

    International Nuclear Information System (INIS)

    Sandilands, B.

    1993-01-01

    Plans for a new research reactor at Lucas Heights have sparked a 'civil war' in New South Wales. The author considers the arguments. The leading antagonists are the local government body - The Sutherland Shire Council, Greenpeace, and the Sutherland Shire Environment Centre. Many of the economic benefits claimed for the existing and proposed replacement reactor have been tagged with question marks. However, ANSTO is confident of refuting claims that the money could be better spent on alternative methods of producing medical isotopes and neutron streams for industry or research, such as particle accelerators. If ANSTO's critics have their way, non-reactor-dependent work like the laser enrichment project could continue without the alleged hazards of sustained nuclear fission. If ANSTO wins the day, a far more efficient reactor will be built which is capable of keeping pace with the emerging nuclear industries of Asia. ills

  8. Luca Cambiaso: nuevos datos sobre sus herederos

    Directory of Open Access Journals (Sweden)

    Cano de Gardoqui García, José Luis

    2015-09-01

    Full Text Available Payment documents in favor of Orazio Cambiaso, son the painter Luca Cambiaso, active in El Escorial between 1583 and 1585, demonstrate that Lauretta, daughter of Luca, renounced money owed to her father for the execution of paintings and arrears from his pay that she was entitled to as his heir.Documentos de pago a favor de Orazio Cambiaso, hijo del pintor Luca Cambiaso, activo en El Escorial entre 1583 y 1585, prueban la renuncia de Laureta, hija de Luca, al dinero procedente de atrasos por ejecución de pinturas y nóminas del Maestro, que ésta habría de cobrar en calidad de su heredera.

  9. On generalized Fibonacci and Lucas polynomials

    Energy Technology Data Exchange (ETDEWEB)

    Nalli, Ayse [Department of Mathematics, Faculty of Sciences, Selcuk University, 42075 Campus-Konya (Turkey)], E-mail: aysenalli@yahoo.com; Haukkanen, Pentti [Department of Mathematics, Statistics and Philosophy, 33014 University of Tampere (Finland)], E-mail: mapehau@uta.fi

    2009-12-15

    Let h(x) be a polynomial with real coefficients. We introduce h(x)-Fibonacci polynomials that generalize both Catalan's Fibonacci polynomials and Byrd's Fibonacci polynomials and also the k-Fibonacci numbers, and we provide properties for these h(x)-Fibonacci polynomials. We also introduce h(x)-Lucas polynomials that generalize the Lucas polynomials and present properties of these polynomials. In the last section we introduce the matrix Q{sub h}(x) that generalizes the Q-matrix whose powers generate the Fibonacci numbers.

  10. Multiple-Objective Stepwise Calibration Using Luca

    Science.gov (United States)

    Hay, Lauren E.; Umemoto, Makiko

    2007-01-01

    This report documents Luca (Let us calibrate), a multiple-objective, stepwise, automated procedure for hydrologic model calibration and the associated graphical user interface (GUI). Luca is a wizard-style user-friendly GUI that provides an easy systematic way of building and executing a calibration procedure. The calibration procedure uses the Shuffled Complex Evolution global search algorithm to calibrate any model compiled with the U.S. Geological Survey's Modular Modeling System. This process assures that intermediate and final states of the model are simulated consistently with measured values.

  11. Power sums of fibonacci and Lucas numbers | Chu | Quaestiones ...

    African Journals Online (AJOL)

    Lucas numbers are established, which include, as special cases, four for-mulae for odd power sums of Melham type on Fibonacci and Lucas numbers, obtained recently by Ozeki and Prodinger (2009). Quaestiones Mathematicae 34(2011), 75- ...

  12. Jürjens vs. Lucas / Gert Kiiler

    Index Scriptorium Estoniae

    Kiiler, Gert

    2009-01-01

    Neljandast Indiana Jones'i filmist "Indiana Jones ja kristallpealuu kuningriik" ("Indiana Jones and the Kingdom of the Crystal Skull"), režissöör Georg Lucas. Viljandist pärit Hollywoodis filme tegeva Priit Jürjensi (Brad Jurjensi) märulifilmist "Palgamõrtsukas" ("Hired Gun")

  13. Erri de Luca: non ora, non qui

    Directory of Open Access Journals (Sweden)

    Mariarosaria Fabris

    1994-12-01

    Full Text Available The essential theme of Erri de Luca´s first novel is the conquest of word as a mean of communication with other people and, mainly, as a mean to make memory revive and to express one´s own feelings.

  14. Chamber of Commerce reception for Dr. Lucas

    Science.gov (United States)

    1986-01-01

    Dr. William R. Lucas, Marshall's fourth Center Director (1974-1986), delivers a speech in front of a picture of the lunar landscape with Earth looming in the background while attending a Huntsville Chamber of Commerce reception honoring his achievements as Director of Marshall Space Flight Center (MSFC).

  15. Lucas Heights buffer zone: plan of management

    International Nuclear Information System (INIS)

    1986-01-01

    This plan is being used by the Commission as a guide for its management of the Lucas Heights buffer zone, which is essentially a circular area having a 1-6 km radius around the HIFAR reactor. Aspects covered by this plan include past uses, current use, objectives for buffer zone land management, emergency evacuation, resource conservation, archaeology, fire, access, rehabilitation of disturbed areas, resource management and plan implementation

  16. Fibonacci-Lucas SIC-POVMs

    Science.gov (United States)

    Grassl, Markus; Scott, Andrew J.

    2017-12-01

    We present a conjectured family of symmetric informationally complete positive operator valued measures which have an additional symmetry group whose size is growing with the dimension. The symmetry group is related to Fibonacci numbers, while the dimension is related to Lucas numbers. The conjecture is supported by exact solutions for dimensions d = 4, 8, 19, 48, 124, and 323 as well as a numerical solution for dimension d = 844.

  17. Some Finite Sums Involving Generalized Fibonacci and Lucas Numbers

    Directory of Open Access Journals (Sweden)

    E. Kılıç

    2011-01-01

    Full Text Available By considering Melham's sums (Melham, 2004, we compute various more general nonalternating sums, alternating sums, and sums that alternate according to (−12+1 involving the generalized Fibonacci and Lucas numbers.

  18. On the Periods of Biperiodic Fibonacci and Biperiodic Lucas Numbers

    Directory of Open Access Journals (Sweden)

    Dursun Tascı

    2016-01-01

    Full Text Available This paper is concerned with periods of Biperiodic Fibonacci and Biperiodic Lucas sequences taken as modulo prime and prime power. By using Fermat’s little theorem, quadratic reciprocity, many results are obtained.

  19. Understanding Robert Lucas (1967-1981: his influence and influences

    Directory of Open Access Journals (Sweden)

    Alexandre F.S. Andrada

    2017-05-01

    Full Text Available This paper analyzes Robert Lucas's contribution to economic theory between 1967 (year of his first solo publication and 1981 (the year before the emergence of Real Business Cycle approach, and it has two parts. The first one, using citation data from three different sources, we try to answer two questions: (i What are Lucas's most influential papers currently? (ii How has this influence changed through time? We show, for instance, that according to two of those three sources, Lucas's most influential paper today is not from his business cycle research agenda, which gave him his Nobel Prize in 1995. Moreover, it is clear the loss of influence of Lucas's macroeconomic theory since the early 1980s. In the second part, by cataloging all the works that Lucas had used as bibliographical references in his papers and separating them in two categories (positive and negative, we try to understand who exerted influence on him. We show that the author that Lucas most cited in a positive context were John Muth, Milton Friedman and Edmund Phelps. The authors more often cited in a negative context were John M. Keynes and A. W. Phillips. We discuss the reasons behind this data.

  20. Dublin and Irish politics in the age of Charles Lucas.

    Science.gov (United States)

    Hill, J

    2015-09-01

    In addition to his contributions to medicine, Charles Lucas had a long career in politics, starting in the 1740s as a guild representative on the lower house of Dublin corporation, and culminating in his election to the Irish House of Commons in 1761. By examining the background in Dublin and Irish politics, this paper explores Lucas' impact on the electorate, and how it was that he was able to win a parliamentary seat in Dublin and retain it for a decade while he campaigned in support of a range of important Patriot issues. Lucas had none of the qualifications that would normally be required for a successful politician. His father held some land, but as a younger son who had to make a living, Charles was apprenticed to a Dublin apothecary. Nor did he have the political connections that might have compensated for a lack of land, wealth, or status. But Lucas possessed other advantages, notably an education that enabled him to read the city's medieval charters, identifying areas where the Dublin freemen had lost 'ancient rights', and some experience of publishing, so that he could appeal to the electorate. Lucas' remarkable political success stemmed from both local circumstances and his own personal qualities.

  1. Lucas and patriotism in mid-eighteenth century Ireland.

    Science.gov (United States)

    Magennis, E

    2015-09-01

    This paper explores the extent to which Charles Lucas can be described as a typical patriot in mid-eighteenth century Ireland. The political ideas and practices of Irish patriots of the mid-eighteenth century belong to broad spectrum including opposition MPs, anti-Catholic rhetoricians and questioners of the usefulness of the penal laws, economic pamphleteers and individuals interested in recovering Ireland's history and antiquities. Lucas was significant in that he sometimes inhabited all of these political and cultural guises, but also mobilised the Dublin public in political campaigns and was striking in his voluminous output in newspapers and pamphlets.

  2. Some New Fibonacci and Lucas Identities by Matrix Methods

    Science.gov (United States)

    Keskin, Refik; Demirturk, Bahar

    2010-01-01

    The aim of this article is to characterize the 2 x 2 matrices "X" satisfying X[superscript 2] = X + I and obtain some new identities concerning with Fibonacci and Lucas numbers. The recommendations regarding the teaching of the identities given in this article can be presented in two cases. The first is related to the pedagogical aspect. The…

  3. Het Theatre van Lucas d'Heere. Een kostuumhistorisch onderzoek

    NARCIS (Netherlands)

    Conrads-de Bruin, M.

    2006-01-01

    The poet and painter Lucas d’Heere (1534-1584) is best portrayed by his pupil Karel van Mander. Through his Schilder-Boeck (1604; 'The Book of Painters') we are informed that D’Heere was a portrait painter with a good memory, a designer of patterns for tapestries and collector of antiques. After the

  4. A Combinatorial Proof of a Result on Generalized Lucas Polynomials

    Directory of Open Access Journals (Sweden)

    Laugier Alexandre

    2016-09-01

    Full Text Available We give a combinatorial proof of an elementary property of generalized Lucas polynomials, inspired by [1]. These polynomials in s and t are defined by the recurrence relation 〈n〉 = s〈n-1〉+t〈n-2〉 for n ≥ 2. The initial values are 〈0〉 = 2; 〈1〉= s, respectively.

  5. On Pell, Pell-Lucas, and balancing numbers.

    Science.gov (United States)

    Karadeniz Gözeri, Gül

    2018-01-01

    In this paper, we derive some identities on Pell, Pell-Lucas, and balancing numbers and the relationships between them. We also deduce some formulas on the sums, divisibility properties, perfect squares, Pythagorean triples involving these numbers. Moreover, we obtain the set of positive integer solutions of some specific Pell equations in terms of the integer sequences mentioned in the text.

  6. On the m-extension of the Fibonacci and Lucas p-numbers

    International Nuclear Information System (INIS)

    Kocer, E. Gokcen; Tuglu, Naim; Stakhov, Alexey

    2009-01-01

    In this article, we define the m-extension of the Fibonacci and Lucas p-numbers (p ≥ 0 is integer and m > 0 is real number) from which, specifying p and m, classic Fibonacci and Lucas numbers (p = 1, m = 1), Pell and Pell-Lucas numbers (p = 1, m = 2), Fibonacci and Lucas p-numbers (m = 1), Fibonacci m-numbers (p = 1), Pell and Pell-Lucas p-numbers (m = 2) are obtained. Afterwards, we obtain the continuous functions for the m-extension of the Fibonacci and Lucas p-numbers using the generalized Binet formulas. Also we introduce in the article a new class of mathematical constants - the Golden (p, m)-Proportions, which are a wide generalization of the classical golden mean, the golden p-proportions and the golden m-proportions. The article is of fundamental interest for theoretical physics where Fibonacci numbers and the golden mean are used widely.

  7. Repeatability of Lucas chamber measurements; Powtarzalnosc pomiarow za pomoca komory Lucasa

    Energy Technology Data Exchange (ETDEWEB)

    Machaj, B.

    1997-12-31

    Results of investigations concerning the repeatability of the measurements carried out with Lucas chamber are presented in the report. The Lucas chamber is used for determination of radon concentration in air, and the Lucas chamber itself is measured in a laboratory stand. The repeatability of measurements is {+-}5.4% relative. The error due to instability of measuring channel gain is estimated to be 2-3% relative. (author). 5 refs, 17 figs, 5 tabs.

  8. Combinatorial interpretations of binomial coefficient analogues related to Lucas sequences

    OpenAIRE

    Sagan, Bruce; Savage, Carla

    2009-01-01

    Let s and t be variables. Define polynomials {n} in s, t by {0}=0, {1}=1, and {n}=s{n-1}+t{n-2} for n >= 2. If s, t are integers then the corresponding sequence of integers is called a Lucas sequence. Define an analogue of the binomial coefficients by C{n,k}={n}!/({k}!{n-k}!) where {n}!={1}{2}...{n}. It is easy to see that C{n,k} is a polynomial in s and t. The purpose of this note is to give two combinatorial interpretations for this polynomial in terms of statistics on integer partitions in...

  9. Welfare and evacuation sub-plan: APTCARE - Lucas Heights

    International Nuclear Information System (INIS)

    1985-11-01

    This Sub-plan has been prepared as a contingency plan to the APTCARE document - A plan to cope with an accident at the Australian Atomic Energy Commission's Research Establishment at Lucas Heights. It details procedures to be followed for the evacuation and welfare of citizens residing in areas outside the Commission's establishment in the event that their health or safety is threatened by reason of an accident at the nuclear reactor facility which could have off-site implications. Additionally, it lists roles and tasking assignments of various counter-disaster response and support agencies in such an occurrence

  10. The Innovative Design of Lucas Cell for Radon Gas Measurement

    International Nuclear Information System (INIS)

    Wanabongse, Paitoon; Rattanabussayaporn, Sakon; Sriya, Maitree; Sola, Banthom

    2007-08-01

    Full text: Lucas scintillation cell has been widely used for radon gas measurement. They are commercially available but usually with a rather high price, therefore, four cells were developed and built in house. The invented radon gas detector has a special feature; the circumference of the upper part of the cylindrical detector is larger than the lower part. The purpose of this is to allow the light sensing device coupled at the lower end can better detect the phosphorescence light occurred inside. The result is that the invented detector yields higher detection efficiency. This special feature also allows us to increase the volume of the detector which results in higher detection sensitivity

  11. Measurement of radon concentration in air employing Lucas chamber

    International Nuclear Information System (INIS)

    Machaj, B.

    1997-01-01

    The results of investigations aimed to determine the main features of radon concentration gauge in air, employing 0.17 L Lucas chamber, and air sample forced by an air pump are presented. For two hour sampling and measuring cycle time the dynamic error in the worst case (first read out) equals 5 % relative to the step jump of radon concentration. This is due to the increase of activity of the decay products in the chamber. It was observed that the short lived radon decay products (Po-218, Pb-214, Bi-214) are depositing on the walls of the chamber and they are not removed by flushing the chamber with air. (author)

  12. Proposed replacement nuclear research reactor, Lucas Heights, NSW

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-08-12

    On 17 February 1999, the House of Representatives referred to the Parliamentary Standing Committee on Public Works for consideration and report the proposed replacement nuclear research reactor at Lucas Heights, New South Wales. The Committee received a written submission from ANSTO and took evidence from ANSTO officials at public hearings held at Parliament House. It has also received submissions and took evidence from a number of organisations and individuals. Prior to the first day of public hearings, the Committee undertook an extensive inspection of the facilities at Lucas Heights. The Committee's main conclusion and recommendations are as follows: (1) A need exists to replace HIFAR with a modern research reactor. The need for the replacement of HIFAR arises as a consequence of national interest considerations, research and development requirements and the need to sustain the local production of radiopharmaceuticals. The comparative costs of locating the replacement research reactor at Lucas Heights or a green fields site favour the former by a considerable margin. The refurbishing HIFAR of would not provide an enhancement of its research and operational capabilities which are considered by the scientific community to be limited. Such limitations have led to a reduction in national research and development opportunities. It is estimated that the new national research reactor must be operational some time before HIFAR is decommissioned. Provided all recommendations and commitments contained in the Environment Assessment Report are implemented during construction and commissioning and for the expected life of the research reactor, the Committee believes, based on the evidence, that all known risks have been identified and their impact on public safety will be as low as technically possible. It is recommended that during the licensing, construction and commissioning phases ANSTO should provide the Committee with six-monthly reports on progress and that removal of

  13. Proposed replacement nuclear research reactor, Lucas Heights, NSW

    International Nuclear Information System (INIS)

    1999-01-01

    On 17 February 1999, the House of Representatives referred to the Parliamentary Standing Committee on Public Works for consideration and report the proposed replacement nuclear research reactor at Lucas Heights, New South Wales. The Committee received a written submission from ANSTO and took evidence from ANSTO officials at public hearings held at Parliament House. It has also received submissions and took evidence from a number of organisations and individuals. Prior to the first day of public hearings, the Committee undertook an extensive inspection of the facilities at Lucas Heights. The Committee's main conclusion and recommendations are as follows: 1) A need exists to replace HIFAR with a modern research reactor. The need for the replacement of HIFAR arises as a consequence of national interest considerations, research and development requirements and the need to sustain the local production of radiopharmaceuticals.The comparative costs of locating the replacement research reactor at Lucas Heights or a green fields site favour the former by a considerable margin. The refurbishing HIFAR of would not provide an enhancement of its research and operational capabilities which are considered by the scientific community to be limited. Such limitations have led to a reduction in national research and development opportunities. It is estimated that the new national research reactor must be operational some time before HIFAR is decommissioned. Provided all recommendations and commitments contained in the Environment Assessment Report are implemented during construction and commissioning and for the expected life of the research reactor, the Committee believes, based on the evidence, that all known risks have been identified and their impact on public safety will be as low as technically possible. It is recommended that during the licensing, construction and commissioning phases ANSTO should provide the Committee with six-monthly reports on progress and that removal of

  14. Environmental survey at Lucas Heights Research Laboratories, 1989

    International Nuclear Information System (INIS)

    Hoffman, E.L.; Arthur, J.

    1990-09-01

    Results are presented of an environmental survey conducted in the neighbourhood of the Lucas Heights Research Laboratories during 1989. No radioactivity which could have originated from these laboratories was found in samples collected from possible human food chains. All low-level liquid and gaseous waste discharges were within authorised limits. The maximum possible annual dose to the general public from airborne waste during this period is estimated to be less than 0.01 millisieverts, which is one per cent of the limit for long-term exposure that is recommended by the National Health and Medical Research Council. 9 refs., 17 tabs., 2 figs

  15. Environmental survey at Lucas Heights Research Laboratories, 1990

    International Nuclear Information System (INIS)

    Hoffmann, E.L.

    1991-10-01

    Results are presented of an environmental survey conducted in the neighbourhood of the Lucas Heights Research Laboratories during 1990. No radioactivity which could have originated from these laboratories was found in samples collected from possible human food chains. All low-level liquid and gaseous waste discharges were within authorised limits. The maximum possible annual dose to the general public from airborne waste during this period is estimated to be less than 0.01 millisieverts, which is one per cent of the limit for long-term exposure that is recommended by the National Health and Medical Research Council. 11 refs., 16 tabs., 2 figs

  16. Environmental survey at Lucas Heights Research Laboratories, 1987

    International Nuclear Information System (INIS)

    Giles, M.S.; Foy, J.J.; Hoffmann, E.L.

    1989-12-01

    Results are presented of an environmental survey conducted in the neighbourhood of the Lucas Heights Research Laboratories during 1987. No radioactivity which could have originated from these laboratories was found in samples collected from possible human food chains. All low-level liquid and gaseous waste discharges were within authorized limits. The maximum possible annual dose to the general public from airborne waste during this period is estimated to be less than 0.01 millisieverts, which is one per cent of the limit for long-term exposure that is recommended by the National Health and Medical Research Council. 9 refs., 18 tabs., 2 figs

  17. Environmental survey at Lucas Heights Research Laboratories, 1984

    International Nuclear Information System (INIS)

    Giles, M.S.; Dudaitis, A.

    1986-12-01

    Results are presented of the environmental survey conducted in the neighbourhood of the Lucas Heights Research Laboratories during 1984. These results are satisfactory. No radioactivity which could have originated from these laboratories was found in samples collected from possible human food chains. All low-level liquid and gaseous waste discharges were within authorised limits. The maximum possible annual dose to the general public from airborne waste discharges during this period is estimated to be less than 0.01 millisieverts, which is one per cent of the limit for long-term exposure that is recommended by the National Health and Medical Research Council

  18. Environmental survey at the Lucas Heights Research Laboratories. 1983

    International Nuclear Information System (INIS)

    Giles, M.S.; Dudaitis, A.

    1985-12-01

    Results are presented of the environmental survey conducted in the neighbourhood of the Lucas Heights Research Laboratories during 1983. These results are satisfactory. No radioactivity which could have originated from these laboratories was found in samples collected from possible human food chains. All low-level liquid and gaseous waste discharges were within authorised limits. The maximum possible annual dose to the general public from airborne waste discharges during this period is estimated to be less than 0.01 millisieverts, which is 1 per cent of the limit for long-term exposure that is recommended by the National Health and Medical Research Council

  19. Pell and Pell–Lucas numbers with applications

    CERN Document Server

    Koshy, Thomas

    2014-01-01

    Pell and Pell–Lucas Numbers has been carefully crafted as an undergraduate/graduate textbook; the level of which depends on the college/university and the instructor’s preference. The exposition moves from the basics to more advanced topics in a systematic rigorous fashion, motivating  the reader with numerous examples, figures, and exercises. Only a strong foundation in precalculus, plus a good background in matrices, determinants, congruences, and combinatorics is required. The text may be used in a variety of number theory courses, as well as in seminars, workshops, and other capstone experiences for teachers in-training and instructors at all levels.   A number of  key features  on the Pell family surrounds the historical flavor that is interwoven into an extensive, in-depth coverage of this unique text on the subject. Pell and Pell-Lucas numbers, like the well-known Fibonacci and Catalan numbers, continue to intrigue the mathematical community with their beauty and applicability. Beyond  the cla...

  20. The Bivariate (Complex) Fibonacci and Lucas Polynomials: An Historical Investigation with the Maple's Help

    Science.gov (United States)

    Alves, Francisco Regis Vieira; Catarino, Paula Maria Machado Cruz

    2016-01-01

    The current research around the Fibonacci's and Lucas' sequence evidences the scientific vigor of both mathematical models that continue to inspire and provide numerous specializations and generalizations, especially from the sixties. One of the current of research and investigations around the Generalized Sequence of Lucas, involves it's…

  1. 75 FR 9441 - Lucas-Smith Automotive, Inc.: Potosi, MO; Notice of Negative Determination Regarding Application...

    Science.gov (United States)

    2010-03-02

    ... DEPARTMENT OF LABOR Employment and Training Administration [TA-W-71,388] Lucas-Smith Automotive, Inc.: Potosi, MO; Notice of Negative Determination Regarding Application for Reconsideration By...), applicable to workers and former workers of Lucas- Smith Automotive, Inc., Potosi, Missouri (subject firm...

  2. Environmental and effluent monitoring at Lucas Heights Research Laboratories, 1994

    International Nuclear Information System (INIS)

    Hoffmann, E.L.; Camilleri, A.; Loosz, T.; Farrar, Y.

    1995-12-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Research Laboratories (LHRL) during 1994. All low level liquid and gaseous effluent discharges complied with existing discharge authorisations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges during this period, were estimated to be less than 0.015 mSv/year for receptor locations on the 1.6 km buffer zone boundary around HIFAR. This value represents 1.5 % of the 1 mSv/year dose limit for long term exposure that is recommended by the National Health and Medical Research Council, and 5 % of the site dose constraint of 0.3 mSv/year adopted by ANSTO. 27 refs., 22 tabs., 6 figs

  3. Environmental survey at Lucas Heights Research Laboratories, 1993

    International Nuclear Information System (INIS)

    Hoffmann, E.L.; Looz, T.

    1995-04-01

    Results are presented of the environmental survey conducted in the neighbourhood of the Lucas Heights Research Laboratories during 1993. No activity which could have originated from these laboratories was found in samples collected from possible human food chains. All low-level liquid and gaseous waste discharges were within authorised limits. The maximum possible annual dose to the general public from airborne discharges during this period is estimated to be less than 0.01 mSv, which is one per cent of the dose limit for long term exposure that is recommended by the National Health and Medical Research Council. A list of previous environmental survey reports is attached. 22 refs., 21 tabs., 4 figs

  4. PIXAN: the Lucas Heights PIXE analysis computer package

    International Nuclear Information System (INIS)

    Clayton, E.

    1986-11-01

    To fully utilise the multielement capability and short measurement time of PIXE it is desirable to have an automated computer evaluation of the measured spectra. Because of the complex nature of PIXE spectra, a critical step in the analysis is the data reduction, in which the areas of characteristic peaks in the spectrum are evaluated. In this package the computer program BATTY is presented for such an analysis. The second step is to determine element concentrations, knowing the characteristic peak areas in the spectrum. This requires a knowledge of the expected X-ray yield for that element in the sample. The computer program THICK provides that information for both thick and thin PIXE samples. Together, these programs form the package PIXAN used at Lucas Heights for PIXE analysis

  5. Environmental and effluent monitoring at Lucas Heights Research Laboratories, 1994

    Energy Technology Data Exchange (ETDEWEB)

    Hoffmann, E L; Camilleri, A; Loosz, T; Farrar, Y

    1995-12-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Research Laboratories (LHRL) during 1994. All low level liquid and gaseous effluent discharges complied with existing discharge authorisations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges during this period, were estimated to be less than 0.015 mSv/year for receptor locations on the 1.6 km buffer zone boundary around HIFAR. This value represents 1.5 % of the 1 mSv/year dose limit for long term exposure that is recommended by the National Health and Medical Research Council, and 5 % of the site dose constraint of 0.3 mSv/year adopted by ANSTO. 27 refs., 22 tabs., 6 figs.

  6. Application of Chybeshev Polynomials in Factorizations of Balancing and Lucas-Balancing Numbers

    Directory of Open Access Journals (Sweden)

    Prasanta Kumar Ray

    2012-01-01

    Full Text Available In this paper, with the help of orthogonal polynomial especially Chybeshev polynomials of first and second kind, number theory and linear algebra intertwined to yield factorization of the balancing and Lucas-balancing numbers.

  7. Generalized Identities Involving Common Factors of Generalized Fibonacci, Jacobsthal and Jacobsthal-Lucas Numbers

    Directory of Open Access Journals (Sweden)

    Yashwant K. Panwar

    2013-08-01

    Full Text Available In this paper, we present generalized identities involving common factors of generalized Fibonacci, Jacobsthal and jacobsthal-Lucas numbers. Binet’s formula will employ to obtain the identities.

  8. Future directions of the AMS program at Lucas Heights

    Energy Technology Data Exchange (ETDEWEB)

    Tuniz, C. [Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW (Australia)

    1998-12-31

    The research program based on the ANTARES AMS spectrometer involves applications of the long-lived radionuclides {sup 14}C, {sup 10}Be, {sup 26}Al, {sup 36}Cl and {sup 129}I in earth sciences and archaeology. Examples of environmental applications of AMS at Lucas Heights include: use of the {sup 14}C bomb pulse to determine the age and age-spread of air trapped in Antarctic ice bubbles, key parameters to study the variability of CO{sub 2} and other greenhouse gases in the past; analyses of {sup 14}C bomb-pulse curves in tree rings from tropical regions and the southern hemisphere to improve our understanding of the carbon cycle and air-sea interactions, important processes for the global climate; analyses of {sup 10}Be and {sup 36}Cl produced in-situ in polished glacial bedrock and moraine boulders from Tasmania, New Zealand and Antarctica, as part of a major national project to unravel the timing of glacial cycles in the southern hemisphere. A recent archaeological application has been the radiocarbon dating of charcoal fragments from the rock shelter at Jinmium in the Northern Territory demonstrating that this site was occupied by Aboriginal people only during the late Holocene. In environmental monitoring, the analysis of {sup 129}I, {sup 14}C and {sup 36}Cl in water specimens from Mururoa and Fangatauga contributed to an IAEA study regarding residual radioactivity in the Pacific after the French nuclear program Extended abstract. 5 refs.

  9. Environmental survey at Lucas Heights Research Laboratories, 1992

    International Nuclear Information System (INIS)

    Hoffman, E.L.; Loosz, T.

    1994-07-01

    This report summarises the results from the environmental survey during 1992 and assesses the effects of radioactive discharges on both local population and the environment. None of the samples taken from possible human food chains in the vicinity of the Lucas Heights Research Laboratories contained radioactivity which could be attributed to the operation of the site. The data presented din this report clearly shows that the environmental impact of operations at LHRL has been very low. The effective dose to residents living in the immediate neighbourhood of the reactor are very difficult to measure directly but calculated dose estimates are far lower than those due to natural background radiation and medical exposures. Discharges of airborne radioactive gases were within authorised limits when averaged over the year. The dose to the most sensitive members of the public from iodine-131 releases, was -2 mSv/year and the calculated dose from released noble gases to the most exposed individuals was less than 0.01 mSv/year. These figures represent less than one per cent of the limits recommended by the National Health and Medical Research Council of Australia. The monthly average liquid effluent discharge to the Water Board Sewer during 1992 was less than 30 per cent of the permitted level for all periods except May which rose to 62 per cent. For tritium, the concentration was less than 2 per cent of the specified limit. 23 refs., 19 tabs., 5 tabs

  10. Future directions of the AMS program at Lucas Heights

    International Nuclear Information System (INIS)

    Tuniz, C.

    1998-01-01

    The research program based on the ANTARES AMS spectrometer involves applications of the long-lived radionuclides 14 C, 10 Be, 26 Al, 36 Cl and 129 I in earth sciences and archaeology. Examples of environmental applications of AMS at Lucas Heights include: use of the 14 C bomb pulse to determine the age and age-spread of air trapped in Antarctic ice bubbles, key parameters to study the variability of CO 2 and other greenhouse gases in the past; analyses of 14 C bomb-pulse curves in tree rings from tropical regions and the southern hemisphere to improve our understanding of the carbon cycle and air-sea interactions, important processes for the global climate; analyses of 10 Be and 36 Cl produced in-situ in polished glacial bedrock and moraine boulders from Tasmania, New Zealand and Antarctica, as part of a major national project to unravel the timing of glacial cycles in the southern hemisphere. A recent archaeological application has been the radiocarbon dating of charcoal fragments from the rock shelter at Jinmium in the Northern Territory demonstrating that this site was occupied by Aboriginal people only during the late Holocene. In environmental monitoring, the analysis of 129 I, 14 C and 36 Cl in water specimens from Mururoa and Fangatauga contributed to an IAEA study regarding residual radioactivity in the Pacific after the French nuclear program

  11. Measurement of radon concentration in water with Lucas cell detector

    International Nuclear Information System (INIS)

    Machaj, B.; Pienkos, J.P.

    2003-01-01

    A method for the measurement of radon concentration in water is presented based on flushing a water sample with air in a closed loop with the Lucas cell as alpha radiation detector. The main feature of the method is washing radon away from the larger sample of water (0.75 l) to a small volume of air, approximately 0.5 l, thanks to which a high radon concentration in air and a considerable sensitivity of measurement is achieved. Basic relations and results of measurements of a model of a gauge is given. The estimated measuring sensitivity (S) is 8.5 (cpm)/(Bq/l). The random error due to the statistical fluctuations of count rate at radon concentrations 1,10, 100, 1000, 10000 Bq/l is 11, 3.6, 1.1, 0.4, 0.1% correspondingly at a counting (measuring) time of 10 min. The minimum detectable radon concentration in water is 0.11 Bq/l. (author)

  12. Environmental survey at Lucas Heights Research Laboratories, 1991

    International Nuclear Information System (INIS)

    Hoffmann, E.L.; Looz, T.

    1994-05-01

    In common with many other nuclear facilities, ANSTO undertakes an extensive program of meteorological measurements. The prime reason for such a program is to allow estimates to be made of the downwind concentration of any airborne pollutants, particularly radionuclides, released from the site through routine operations or under accident conditions. The data collection from this program provide the necessary input to the atmospheric dispersion model called ADDCOR (ANSTO 1989) which can be used to compute the effective dose to an individual due to the routine airborne or accidental release of radionuclides from the LHRL. None of the samples taken from possible human food chains in the vicinity of the Lucas Heights Research Laboratories contained radioactivity which could be attributed to the operation of the site. Discharges of airborne radioactive gases were within authorised limits when averaged over the year. The dose to the most sensitive members of the public from iodine-131 release, was -3 mSv/year and the calculated dose from released noble gases to the most exposed individuals was less than 0.01 mSv/year. These figures represent less than one per cent of the most restrictive limits recommended by the National Health and Medical Research Council of Australia. The annual average liquid effluent discharge to the Water Board Sewer during 1991 was less than 29 per cent of the permitted level. For tritium, the concentration was less than 2 per cent of the specified limit. The data presented in this report clearly shows that the environmental impact of operations at LHRL has been very low. The effective dose to residents living in the immediate neighbourhood of the reactor are very difficult to measure directly but calculated dose estimates are far lower than those due to natural background radiation and medical exposures. 24 refs., 19 tabs., 4 figs

  13. Modified-Fibonacci-Dual-Lucas method for earthquake prediction

    Science.gov (United States)

    Boucouvalas, A. C.; Gkasios, M.; Tselikas, N. T.; Drakatos, G.

    2015-06-01

    The FDL method makes use of Fibonacci, Dual and Lucas numbers and has shown considerable success in predicting earthquake events locally as well as globally. Predicting the location of the epicenter of an earthquake is one difficult challenge the other being the timing and magnitude. One technique for predicting the onset of earthquakes is the use of cycles, and the discovery of periodicity. Part of this category is the reported FDL method. The basis of the reported FDL method is the creation of FDL future dates based on the onset date of significant earthquakes. The assumption being that each occurred earthquake discontinuity can be thought of as a generating source of FDL time series The connection between past earthquakes and future earthquakes based on FDL numbers has also been reported with sample earthquakes since 1900. Using clustering methods it has been shown that significant earthquakes (conjunct Sun, Moon opposite Sun, Moon conjunct or opposite North or South Modes. In order to test improvement of the method we used all +8R earthquakes recorded since 1900, (86 earthquakes from USGS data). We have developed the FDL numbers for each of those seeds, and examined the earthquake hit rates (for a window of 3, i.e. +-1 day of target date) and for <6.5R. The successes are counted for each one of the 86 earthquake seeds and we compare the MFDL method with the FDL method. In every case we find improvement when the starting seed date is on the planetary trigger date prior to the earthquake. We observe no improvement only when a planetary trigger coincided with the earthquake date and in this case the FDL method coincides with the MFDL. Based on the MDFL method we present the prediction method capable of predicting global events or localized earthquakes and we will discuss the accuracy of the method in as far as the prediction and location parts of the method. We show example calendar style predictions for global events as well as for the Greek region using

  14. A proposal of the proteome before the last universal common ancestor (LUCA)

    Science.gov (United States)

    de Farias, Sávio Torres; Rêgo, Thais Gaudêncio; José, Marco V.

    2016-01-01

    The search for understanding the biological nature of the last universal common ancestor (LUCA) has been a theoretical challenge and has sparked intense debate in the scientific community. We reconstructed the ancestral sequences of tRNAs in order to test the hypothesis that these molecules originated the first genes. The results showed that the proteome before LUCA may have been composed of basal energy metabolism, namely, compounds with three carbons in the glycolytic pathway, which operated as a distribution centre of substrates for the development of metabolic pathways of nucleotides, lipids and amino acids. Thus, we present a proposal for metabolism in organisms before LUCA that was the initial core for the assembly of further metabolic pathways.

  15. An updated analysis of the Lucas Heights climatology 1991-2003

    International Nuclear Information System (INIS)

    Clark, G.H.

    2003-12-01

    Meteorological data collected from 1991 to 2003 in the Lucas Heights region have been summarised to provide an update on the climatology. This report represents analysis of data collected at the Lucas Heights Science and Technology Centre since 1991 when an advanced digital recording system was installed. The small network of meteorological stations installed in the surrounding region since 1993 has allowed an investigation of the influence of complex terrain on wind flow and atmospheric dispersion patterns. For a period between 1999 and 2001 a Bureau of Meteorology disdrometer was installed at Lucas Heights to investigate raindrop size distributions. A large number of statistical summaries for all meteorological data are presented in in two appendices at the end of the report as a resource for reference purposes

  16. ¡Felices aquellos siervos! Lucas 12, 37

    Directory of Open Access Journals (Sweden)

    Ignacio Chuecas Saldías

    2006-01-01

    Full Text Available ¡Felices aquellos siervos! Lucas 12, 37 Las Bienaventuranzas en el Evangelio como reflejo de la propuesta de felicidad de Jesús El presente artículo investiga el tema de las bienaventuranzas en el Nuevo Testamento, es decir, la declaración de felicidad en los evangelios como un testimonio del anuncio de Jesús en relación a la felicidad humana. El empleo del género macarisma es especialmente relevante en la tradición de los evangelios sinópticos, en especial en Lucas y Mateo, estando totalmente ausente en Marcos. Un primer paso para acercarse a la temática es la presentación de los antecedentes veterotestamentarios: Jesús al emplear el género literario de los macarismas para anunciar su propuesta de felicidad lo hace a partir de un elemento clásico en la literatura del Antiguo Testamento. Pero al mismo tiempo lo adapta a la nueva situación del anuncio del Reino de Dios. En la literatura sapiencial era considerado feliz quien sigue los caminos de la Torá; en la predicación de Jesús son felices los pequeños porque en ellos se manifiestan las nuevas leyes del reinado de Dios. En el caso de las bienaventuranzas lucanas, los macarismas, propios de la escuela sapiencial, son complementados con lamentos, propios de las escuelas proféticas. Al mismo tiempo que se acentúa la centralidad del tema de la pobreza material. En la tradición de Mateo los macarismas son expresión de la nueva Torá proclamada por Jesús, como nuevo Moisés; bajo esta perspectiva el tema de la felicidad adquiere un significado especial. Lo propio de las Bienaventuranzas de Mateo es la tendencia a focalizar la actitud interior-espiritual del hombre: es en el interior del hombre donde se ha de cumplir la nueva ley dada por Jesús. Sin duda que el empleo de los macarismas en el Nuevo Testamento es reflejo de un momento importante en la predicación de Jesús: la felicidad del Reino es prometida a quienes representan los valores del ReinoHappy those servants

  17. An updated analysis of the Lucas Heights Climatology - 1975 to 1996

    Energy Technology Data Exchange (ETDEWEB)

    Clark, G.H

    1997-06-01

    Meteorological data collected from 1975 to 1996 in the Lucas Heights region have been summarised to provide an update on the climatology. Initially data were recorded in analogue form but since 1991 advanced digital recording systems have allowed more accurate and extensive statistics to be analysed. Since 1993 a network of meteorological stations has been installed through the surrounding area to investigate the influence of complex terrain on wind flow and atmospheric dispersion patterns. A large data volumes is presented together with some initial interpretation of these complex terrain influences on the Lucas Heights region climatolology. 33 refs., 25 tabs., 45 figs.

  18. Description of and operating instructions for the Lucas Heights Gamma Technology Research Irradiator (GATRI)

    International Nuclear Information System (INIS)

    Izard, M.E.

    1985-12-01

    This manual describes the gamma technology research irradiator (GATRI) located at Lucas Heights and the procedures necessary for its operation and maintenance. It supersedes a previous operating manual (AAEC/M88) as a result of the introduction of AAEC type 560 safety and control equipment into GATRI

  19. Australian Atomic Energy Commission: A new energy research establishment at Lucas Heights

    Energy Technology Data Exchange (ETDEWEB)

    Moyal, A [Sydney Univ. (Australia). Dept. of Government and Public Administration

    1980-02-01

    A review of the role of the Atomic Energy Commission has recommended that the Lucas Heights establishment should engage in research on energy sources in general, rather than nuclear only as at present, and that certain of its present functions (regulatory and manufacturing) should be handled by other organisations.

  20. A plan to cope with accidents at the research establishment of the Australian Science and Technology Organization, Lucas Heights, NSW

    International Nuclear Information System (INIS)

    1989-10-01

    This plan details command, coordination and support responses of Commonwealth and NSW Government in the event of an accident with off-site consequences at the Lucas Heights Research Laboratories. 7 tabs., map

  1. Filling machine preventive maintenance using age replacement method in PT Lucas Djaja

    Directory of Open Access Journals (Sweden)

    Mustofa Fifi Herni

    2018-01-01

    Full Text Available PT Lucas Djaja is a company engaged in the pharmaceutical industry which produce sterile drugs and non-sterile. Filling machine has a high failure rate and expensive corrective maintenance cost. PT Lucas Djaja has a policy to perform engine maintenance by way of corrective maintenance. The study focused on the critical components, namely bearing R2, bearing 625 and bearing 626. When the replacement of the failure done by the company is currently using the formula mean time to failure with the result of bearing R2 at point 165 days, bearing 625 at a point 205 days, and bearing 626 at a point 182 days. Solutions generated by using age replacement method with minimization of total maintenance cost given on the bearing R2 at a point 60 days, bearing 625 at the point of 80 days and bearing 626 at a point 40 days.

  2. Fashioning an ex-crook self: citizenship and criminality in the work of Netley Lucas.

    Science.gov (United States)

    Houlbrook, Matt

    2013-01-01

    This essay uses the autobiographical and journalistic work of the confidence trickster Netley Lucas to explore the possibilities and problems of writing as an ex-crook in inter-war Britain. In so doing, it considers the intersections between emerging forms of mass culture, popular and scientific narratives of criminality, and increasingly heated debates about the social and institutional management of crime. This case study provides an opportunity to think critically about the extent to which inter-war criminology was the modernizing project it often claimed to be. In the hands of Lucas and others, different modes of writing about crime bled into one another. Older forms of criminal confession coexisted with 'modern' criminological knowledge as mutually constitutive ways of apprehending the social.

  3. Da questa parte del mare. Gianmaria Testa ed Erri De Luca nel secolo delle migrazioni

    Directory of Open Access Journals (Sweden)

    Isabella Maria Zoppi

    2009-11-01

    Full Text Available Gianmaria Testa's album Da questa parte del mare (2006 expresses a fifteen-year-long meditation about the theme of the great migrations which have marked the Twentieth Century. That same theme is considered by Erri De Luca as the only possible, epic narration of the contemporary world. On the one hand, Testa's project finds its starting point from the song-writer's capacity of observing and interpreting common stories as well as from his considerations about the changing of History; on the other hand, it takes origin from the reading of Erri De Luca's novels and lyrics, especially those of Solo andata. Righe che vanno troppo spesso a capo (2005. Within Testa's Da questa parte del mare, their lyrical voices and artistic and human perspectives seem somehow to cross and melt. Through his songs, Testa tells in an original way the new human geography traced by the migrant phenomenon across the Mediterranean and Europe.

  4. Environmental survey at the AAEC Research Establishment, Lucas Heights - results for 1979

    International Nuclear Information System (INIS)

    Giles, M.S.; Dudaitis, A.

    1980-09-01

    This report presents the results of the environmental survey at the AAEC Research Establishment, Lucas Heights, during 1979. They show that the only radioactivity detected which could be of AAECRE origin and which could also be ingested by humans was due to tritium. The maximum credible dose which a member of the public could receive from this radioactivity is calculated to be one ten thousandth of the derived working limit consistent with the latest recommendations of the International Commission on Radiological Protection

  5. Tim, Jan Lucas ja Karl Robert - vennad üheks kuuks / Maris Laurits

    Index Scriptorium Estoniae

    Laurits, Maris

    2009-01-01

    Rakvere Teatri suvelavastuse "Vennad Lõvisüdamed" kaks Karli osatäitjat Jan Lucas Videvik ja Tim Leesnurm ning Joonatani osatäitja Karl Robert Saaremäe tegid Loksal Kaldmaa talus ratsasõiduproove. Üllar Saaremäe lavastuse "Vennad Lõvisüdamed" (Astrid Lindgreni samanimelise jutustuse järgi) esietendus on 11. juunil Rakvere teatri taga aias

  6. The moderator's moderator

    International Nuclear Information System (INIS)

    Williamson, G.K.

    1990-01-01

    A brief account is given of the development of graphite moderators for Magnox and advanced gas cooled reactors. The accident at Windscale in 1957 brought to worldwide attention the importance of irradiation damage in graphite and the consequent storage of Wigner energy. In spite of the Windscale setback, preparations for the civil programme of Magnox reactors went ahead apace. Some of the background to the disastrous Dungeness B tender is presented. In spite of all the difficulties and uncertainties, the graphite in UK reactors has performed well. In all cases, as far as the author is aware, the behaviour of the graphite moderators will not prevent design life being achieved. (author)

  7. A new numerical treatment based on Lucas polynomials for 1D and 2D sinh-Gordon equation

    Science.gov (United States)

    Oruç, Ömer

    2018-04-01

    In this paper, a new mixed method based on Lucas and Fibonacci polynomials is developed for numerical solutions of 1D and 2D sinh-Gordon equations. Firstly time variable discretized by central finite difference and then unknown function and its derivatives are expanded to Lucas series. With the help of these series expansion and Fibonacci polynomials, matrices for differentiation are derived. With this approach, finding the solution of sinh-Gordon equation transformed to finding the solution of an algebraic system of equations. Lucas series coefficients are acquired by solving this system of algebraic equations. Then by plugginging these coefficients into Lucas series expansion numerical solutions can be obtained consecutively. The main objective of this paper is to demonstrate that Lucas polynomial based method is convenient for 1D and 2D nonlinear problems. By calculating L2 and L∞ error norms of some 1D and 2D test problems efficiency and performance of the proposed method is monitored. Acquired accurate results confirm the applicability of the method.

  8. Australia's nuclear reactor: how safe is the old lady of Lucas Heights?

    International Nuclear Information System (INIS)

    Darroch, R.

    1990-01-01

    Safety procedures at the Lucas Heights reactor are discussed based on concerns voiced by a group of senior engineers working at the site. An account is also given of the responses to this claims of the authorities, the courts as well as some of the safety considerations outlined in a recent review of HIFAR management, recently completed by a team of nuclear experts from the Atomic Energy of Canada. It is argued that sufficient doubts have been raised to warrant an independent inquiry on the safety and future of the aging reactor. ills

  9. Using LUCAS topsoil database to estimate soil organic carbon content in local spectral libraries

    Science.gov (United States)

    Castaldi, Fabio; van Wesemael, Bas; Chabrillat, Sabine; Chartin, Caroline

    2017-04-01

    The quantification of the soil organic carbon (SOC) content over large areas is mandatory to obtain accurate soil characterization and classification, which can improve site specific management at local or regional scale exploiting the strong relationship between SOC and crop growth. The estimation of the SOC is not only important for agricultural purposes: in recent years, the increasing attention towards global warming highlighted the crucial role of the soil in the global carbon cycle. In this context, soil spectroscopy is a well consolidated and widespread method to estimate soil variables exploiting the interaction between chromophores and electromagnetic radiation. The importance of spectroscopy in soil science is reflected by the increasing number of large soil spectral libraries collected in the world. These large libraries contain soil samples derived from a consistent number of pedological regions and thus from different parent material and soil types; this heterogeneity entails, in turn, a large variability in terms of mineralogical and organic composition. In the light of the huge variability of the spectral responses to SOC content and composition, a rigorous classification process is necessary to subset large spectral libraries and to avoid the calibration of global models failing to predict local variation in SOC content. In this regard, this study proposes a method to subset the European LUCAS topsoil database into soil classes using a clustering analysis based on a large number of soil properties. The LUCAS database was chosen to apply a standardized multivariate calibration approach valid for large areas without the need for extensive field and laboratory work for calibration of local models. Seven soil classes were detected by the clustering analyses and the samples belonging to each class were used to calibrate specific partial least square regression (PLSR) models to estimate SOC content of three local libraries collected in Belgium (Loam belt

  10. Proton induced X-ray emission (PIXE) analysis at Lucas Heights

    International Nuclear Information System (INIS)

    Cohen, D.; Duerden, P.

    1979-02-01

    The state of the proton induced X-ray emission (PIXE) work at Lucas Heights is reported together with a full description of the experimental arrangement and its use for analysis of trace elements (Z >or= 14). The fundamentals of PIXE are examined in detail with a view to understanding not only the background continuum but also the X-ray production mechanisms. Quantitative predictions for the number of X-rays detected after proton bombardment of the target have been made and these compare well with experiments

  11. Recent applications of neutron activation analysis in geoscience at Lucas Heights

    International Nuclear Information System (INIS)

    Fardy, J.J.

    1985-01-01

    In spite of developments in instrumental techniques of analysis over the last decade, neutron activation analysis has maintained its importance as a multielemental technique for analysing a wide range of geological materials. Some of its applications in geoscience at Lucas Heights over the last two years are discussed. These include hydrogeochemical and geological prospecting for gold in geothermal and bore water systems and ores, rare earth characterisation of shoshonitic lavas, altered basalts and dacites, and trace element studies of Australian oil shales and coals

  12. La Contabilità pratica prima di Luca Pacioli: Origine della Partita Doppia

    Directory of Open Access Journals (Sweden)

    Carlo Antinori

    2006-12-01

    El trabajo prosigue con un estudio comparativo de las prácticas contables previas a la publicación del Tractatus XI de Luca Pacioli, contenido en su Summa de Arithmetica, seguidas en las principales regiones italianas: Venecia y sus territorios, Milán y la Lombardía, Génova y la Liguria, la Emilia-Romaña y la Toscana. Se describen las particularidades de los distintos tipos de contabilidad surgidos en cada una de estas regiones, señalando las similitudes y diferencias entre cada uno de ellos, así como sus respectivas aproximaciones a la partida doble. El artículo se detiene especialmente en la asignación que Federico Melis hace en exclusiva a la Toscana como descubridora de la contabilidad por partida doble. A estos efectos, estudia las características que Luca Pacioli atribuye a este método contable, por considerar que las mismas constituyen el paradigma de la partida doble. Luego se pasa revista a las diferencias existentes entre el modelo pacioliano y el propuesto por Federico Melis, diferencias que se considera son debidas a un excesivo provincianismo de este autor, empeñado en atribuir a la Toscana la paternidad de la contabilidad por partida doble, cuando en realidad parece que este método fue desarrollado casi simultáneamente en diversas regiones italianas.

  13. Reflexiones sobre la importancia de la Crítica de Lucas

    Directory of Open Access Journals (Sweden)

    Mauricio Sánchez Puerta

    2005-04-01

    Full Text Available La crítica de Lucas sostiene que, bajo la hipótesis de expectativas racionales, los parámetros estimados a partir de un modelo econométrico no se mantendrían. La ocurrencia de cambios de política llevaría a los agentes a modificar sus comportamientos, a fin de adecuarse a la nueva realidad. En consecuencia, los modelos econométricos no podrían utilizarse para fines de formulación de políticas económicas. La crítica de Lucas desafió rigurosamente el modo en que el modelado econométrico se utilizaba tradicionalmente como instrumento para la evaluación de políticas económicas y la forma en que se consideraba la política económica. Aunque la importancia empírica de la crítica sigue siendo motivo de debate, ella contribuyó a la imposición de nuevos patrones en el modelado de la interacción entre las reglas de política y las respuestas de los agentes privados.

  14. The longitudinal urban cohort ageing study (LUCAS: study protocol and participation in the first decade

    Directory of Open Access Journals (Sweden)

    Dapp Ulrike

    2012-07-01

    Full Text Available Abstract Background We present concept, study protocol and selected baseline data of the Longitudinal Urban Cohort Ageing Study (LUCAS in Germany. LUCAS is a long-running cohort study of community-dwelling seniors complemented by specific studies of geriatric patients or diseases. Aims were to (1 Describe individual ageing trajectories in a metropolitan setting, documenting changes in functional status, the onset of frailty, disability and need of care; (2 Find determinants of healthy ageing; (3 Assess long-term effects of specific health promotion interventions; (4 Produce results for health care planning for fit, pre-frail, frail and disabled elderly persons; (5 Set up a framework for embedded studies to investigate various hypotheses in specific subgroups of elderly. Methods/Design In 2000, twenty-one general practitioners (GPs were recruited in the Hamburg metropolitan area; they generated lists of all their patients 60 years and older. Persons not terminally ill, without daily need of assistance or professional care were eligible. Of these, n = 3,326 (48 % agreed to participate and completed a small (baseline and an extensive health questionnaire (wave 1. In 2007/2008, a re-recruitment took place including 2,012 participants: 743 men, 1,269 women (647 deaths, 197 losses, 470 declined further participation. In 2009/2010 n = 1,627 returned the questionnaire (90 deaths, 47 losses, 248 declined further participation resulting in a good participation rate over ten years with limited and quantified dropouts. Presently, follow-up data from 2007/2008 (wave 2 and 2009/2010 (wave 3 are available. Data wave 4 is due in 2011/2012, and the project will be continued until 2013. Information on survival and need of nursing care was collected continuously and cross-checked against official records. We used Fisher’s exact test and t-tests. The study served repeatedly to evaluate health promotion interventions and concepts. Discussion LUCAS

  15. Lucas and Cornelis de Wael: Flemish artists and dealers in Antwerp, Genoa and Rome in the seventeenth century

    NARCIS (Netherlands)

    Stoesser-Johnston, A.M.

    2008-01-01

    Until now the lives and activities of Lucas and Cornelis de Wael have been largely discussed in relation to their friendship with Anthony Van Dyck, who stayed with them in Genoa periodically from 1621 to 1627. This dissertation seeks to rectify this one-sided approach by providing up-to-date

  16. Ethnobotany of Indigenous Saraguros: Medicinal Plants Used by Community Healers “Hampiyachakkuna” in the San Lucas Parish, Southern Ecuador

    Directory of Open Access Journals (Sweden)

    José M. Andrade

    2017-01-01

    Full Text Available This paper reports the results of an ethnobotanical survey on the use of medicinal plants by community healers “Hampiyachakkuna” in the San Lucas Parish, province of Loja, Ecuador. A particular ethnic group, the indigenous Saraguros, inhabits this region. This study reports 183 plant species used in 75 different curative therapies by the Saraguro healers.

  17. Ethnobotany of Indigenous Saraguros: Medicinal Plants Used by Community Healers "Hampiyachakkuna" in the San Lucas Parish, Southern Ecuador.

    Science.gov (United States)

    Andrade, José M; Lucero Mosquera, Hernán; Armijos, Chabaco

    2017-01-01

    This paper reports the results of an ethnobotanical survey on the use of medicinal plants by community healers "Hampiyachakkuna" in the San Lucas Parish, province of Loja, Ecuador. A particular ethnic group, the indigenous Saraguros, inhabits this region. This study reports 183 plant species used in 75 different curative therapies by the Saraguro healers.

  18. Ethnobotany of Indigenous Saraguros: Medicinal Plants Used by Community Healers “Hampiyachakkuna” in the San Lucas Parish, Southern Ecuador

    Science.gov (United States)

    Lucero Mosquera, Hernán; Armijos, Chabaco

    2017-01-01

    This paper reports the results of an ethnobotanical survey on the use of medicinal plants by community healers “Hampiyachakkuna” in the San Lucas Parish, province of Loja, Ecuador. A particular ethnic group, the indigenous Saraguros, inhabits this region. This study reports 183 plant species used in 75 different curative therapies by the Saraguro healers. PMID:28744470

  19. 78 FR 60698 - Safety Zone, Lucas Oil Drag Boat Racing Series; Thompson Bay, Lake Havasu City, AZ.

    Science.gov (United States)

    2013-10-02

    ... this rule because the logistical details of the Lucas Oil Drag Boat Racing Series were not finalized... be enforced from 7 a.m. to 7 p.m. on October 11, 2013 thru October 13, 2013. (c) Definitions. The following definition applies to this section: designated representative, means any commissioned, warrant, or...

  20. Installation, maintenance and operating manual for the Lucas-type fuel injection system of the 3 B rotary engine

    Science.gov (United States)

    1985-01-01

    The installation procedure, maintenance, adjustment and operation of a Lucas type fuel injection system for 13B rotary racing engine is outlined. Components of the fuel injection system and installation procedure and notes are described. Maintenance, adjustment, and operation are discussed.

  1. Invertibility and Explicit Inverses of Circulant-Type Matrices with k-Fibonacci and k-Lucas Numbers

    Directory of Open Access Journals (Sweden)

    Zhaolin Jiang

    2014-01-01

    Full Text Available Circulant matrices have important applications in solving ordinary differential equations. In this paper, we consider circulant-type matrices with the k-Fibonacci and k-Lucas numbers. We discuss the invertibility of these circulant matrices and present the explicit determinant and inverse matrix by constructing the transformation matrices, which generalizes the results in Shen et al. (2011.

  2. Data volume of atmospheric tracer studies at Lucas Heights, NSW, Australia -1996-1997

    International Nuclear Information System (INIS)

    Clark, G.H.; Stone, D.J.M.; Pascoe, J.H.

    2000-01-01

    A perfluorocarbon atmospheric tracer system has been used to investigate atmospheric dispersion processes in the region surrounding the Lucas Heights Science and Technology Centre. Tracers have been released from two locations: a laboratory vent near the ridge of the Woronora river valley and from the HIFAR research reactor ventilation system. Most studies have been conducted during the early to late morning periods when valley influences might be expected on dispersion of the tracer plume. This report summarises the meteorological and tracer air concentration data and makes comparisons with estimates from a simple gaussian dispersion model. It is intended that the data will also be used for evaluation of more elaborate wind field and atmospheric models

  3. GUM approach to uncertainty estimations for online 220Rn concentration measurements using Lucas scintillation cell

    International Nuclear Information System (INIS)

    Sathyabama, N.

    2014-01-01

    It is now widely recognized that, when all of the known or suspected components of errors have been evaluated and corrected, there still remains an uncertainty, that is, a doubt about how well the result of the measurement represents the value of the quantity being measured. Evaluation of measurement data - Guide to the expression of Uncertainty in Measurement (GUM) is a guidance document, the purpose of which is to promote full information on how uncertainty statements are arrived at and to provide a basis for the international comparison of measurement results. In this paper, uncertainty estimations following GUM guidelines have been made for the measured values of online thoron concentrations using Lucas scintillation cell to prove that the correction for disequilibrium between 220 Rn and 216 Po is significant in online 220 Rn measurements

  4. El discurso funerario de Lucas Macías en Al filo del agua

    Directory of Open Access Journals (Sweden)

    Norma Esther García Meza

    2009-07-01

    Full Text Available En la provincia mexicana, los velorios y los enterramientos entretejen rituales y diversas prácticas, como el repaso detallado de las causas de la muerte y valoraciones sobre la vida del difunto, convirtiéndose en eventos de socialización donde el lenguaje tiene un lugar destacado. Animados por las bebidas propias de la región donde ocurren, los asistentes hablan del difunto, de sus deudos y discuten asuntos éticos y filosóficos asociados a la vida y la muerte. Uno de estos discursos es recreado artísticamente en la novela de Yáñez en la figura de Lucas Macías.

  5. [Extraordinary news of a curious apothecary. Monsters and wonders in the Florentine diary of Luca Landucci].

    Science.gov (United States)

    Ciseri, Lorenzo Montemagno

    This article offers a new reading of the well-known diary kept by the Florentine apothecary Luca Landucci between 1450 and 1516, examining its accounts of prodigies and other "monstrous" occurrences from a modern scientific point of view. Particular consideration is given to descriptions of a variety of birth defects observed in various Italian cities at the time, providing explanations for each case based on the latest medical theories. A detailed analysis is provided for a case of cranioschisis recorded in Volterra in 1474, a case of Opitz syndrome occurring in Venice in 1489, the birth of conjoined twins in Padua in the same year, conjoined triplets born to a 60-year-old woman in Venice, the well-publicized account of the 1512 Ravenna monster and, finally, the thoraco-acephalus tetramelus adolescent that Landucci personally observed in Florence in 1513.

  6. Environmental and effluent monitoring at Lucas Heights Science and Technology Centre, 1997

    Energy Technology Data Exchange (ETDEWEB)

    Hoffmann, E L; Loosz, T; Farrar, Y

    1998-11-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Science and Technology Centre (LHSTC) during 1997. All low-level liquid and gaseous effluent discharges complied with existing discharge authorizations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges from HIFAR were estimated utilising the PC-Cream atmospheric dispersion and dosimetry code. The potential effective dose to the public was estimated to be less than 0.010 mSv/year for all receptor locations on the 1.6 km buffer zone boundary around the HIFAR research reactor. This value represents 1% of the 1 mSv/year dose limit for long term exposure that is recommended by the National Health and Medical Research Council and 10% of the HIFAR dose constraint of 0.1 mSv/year 24 tabs., 7 figs.; Glossary; Appendices

  7. Política fiscal óptima en un modelo de Lucas con externalidades.

    Directory of Open Access Journals (Sweden)

    Seijas Macías, J. Antonio.

    2003-01-01

    Full Text Available En este trabajo se desarrolla una política fiscal capaz de proporcionar los incentivos adecuados para que el equilibrio competitivo sea óptimo en el modelo de Lucas con externalidades, tanto en el estado estacionario como a lo largo de la transición. A diferencia de trabajos anteriores, supondremos que la función de producción es del tipo CES. El capital humano medio tiene un efecto externo positivo sobre la producción, lo que provoca que la fracción de tiempo dedicada al estudio sea inferior a la óptima. Para corregir el fallo de mercado provocado por la externalidad, se introduce un subsidio al capital humano y se muestra cómo puede ser financiado.

  8. Environmental and effluent monitoring at Lucas Heights Science and Technology Centre, 1996

    Energy Technology Data Exchange (ETDEWEB)

    Hoffmann, E.L.; Loosz, T.; Farrar, Y.

    1997-06-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Science and Technology Centre during 1996. All low-level liquid and gaseous effluent discharges complied with existing discharge authorizations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges during this period, were estimated to be less than 0.010 mSv/year for receptor locations on the 1.6 km buffer zone boundary around HIFAR. This value represents 1% of the 1 mSv/year dose limit for long term exposure that is recommended by thr National Health and Medical Research Council and 3.3% of the site dose constraint of 0.3mSv/year adopted by ANSTO. Details of the environmental sample collection and analytical procedures are given in the appendices. (authors). 29 refs., 26 tabs., 6 figs.

  9. Environmental and effluent monitoring at Lucas Heights Science and Technology Centre, 1996

    International Nuclear Information System (INIS)

    Hoffmann, E.L.; Loosz, T.; Farrar, Y.

    1997-06-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Science and Technology Centre during 1996. All low-level liquid and gaseous effluent discharges complied with existing discharge authorizations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges during this period, were estimated to be less than 0.010 mSv/year for receptor locations on the 1.6 km buffer zone boundary around HIFAR. This value represents 1% of the 1 mSv/year dose limit for long term exposure that is recommended by thr National Health and Medical Research Council and 3.3% of the site dose constraint of 0.3mSv/year adopted by ANSTO. Details of the environmental sample collection and analytical procedures are given in the appendices. (authors)

  10. Environmental and effluent monitoring at Lucas Heights Science and Technology Centre, 1997

    International Nuclear Information System (INIS)

    Hoffmann, E.L.; Loosz, T.; Farrar, Y

    1998-11-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Science and Technology Centre (LHSTC) during 1997. All low-level liquid and gaseous effluent discharges complied with existing discharge authorizations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges from HIFAR were estimated utilising the PC-Cream atmospheric dispersion and dosimetry code. The potential effective dose to the public was estimated to be less than 0.010 mSv/year for all receptor locations on the 1.6 km buffer zone boundary around the HIFAR research reactor. This value represents 1% of the 1 mSv/year dose limit for long term exposure that is recommended by the National Health and Medical Research Council and 10% of the HIFAR dose constraint of 0.1 mSv/year

  11. Measurement of radon concentration in air employing Lucas chamber; Pomiar koncentracji radonu za pomoca komory Lucasa

    Energy Technology Data Exchange (ETDEWEB)

    Machaj, B.

    1997-12-31

    The results of investigations aimed to determine the main features of radon concentration gauge in air, employing 0.17 L Lucas chamber, and air sample forced by an air pump are presented. For two hour sampling and measuring cycle time the dynamic error in the worst case (first read out) equals 5 % relative to the step jump of radon concentration. This is due to the increase of activity of the decay products in the chamber. It was observed that the short lived radon decay products (Po-218, Pb-214, Bi-214) are depositing on the walls of the chamber and they are not removed by flushing the chamber with air. (author). 4 refs, 19 figs, 2 tabs.

  12. The Larger Bound on the Domination Number of Fibonacci Cubes and Lucas Cubes

    Directory of Open Access Journals (Sweden)

    Shengzhang Ren

    2014-01-01

    Full Text Available Let Γn and Λn be the n-dimensional Fibonacci cube and Lucas cube, respectively. Denote by Γ[un,k,z] the subgraph of Γn induced by the end-vertex un,k,z that has no up-neighbor. In this paper, the number of end-vertices and domination number γ of Γn and Λn are studied. The formula of calculating the number of end-vertices is given and it is proved that γ(Γ[un,k,z]≤2k-1+1. Using these results, the larger bound on the domination number γ of Γn and Λn is determined.

  13. Pengaruh Pengendalian Intern Terhadap Efektivitas Target Produksi PT. Lucas Djaja Pharmaceutical Industry Bandung Jawa Barat

    Directory of Open Access Journals (Sweden)

    Bulan Tati Fitria

    2013-04-01

    Full Text Available The achievement of operational targets is expected by each organization / company. Due to the achievement of the target, it can be judged that the performance of the company very well. Therefore, if it is not achieved it is necessary to study the factors that influence it. For then do repairs on these factors. In the achievement of the target company, it takes a process associated with the target to be achieved. In order to achieve maximum results and effective it is necessary to an adequate internal control structure, which aims to regulate the operational steps the company to run an organized and effective.The study was conducted at PT. Lucas Djaja Pharmaceutical Industry, located in Bandung, is to know how the implementation of internal controls and how they affect the effectiveness of the production targets, in particular the production of injection of 1 (one milliliter. This research used descriptive analysis with research techniques such as interviews, observations, questionnaires and literature study. Based on the results of this study concluded that the implementation of internal control at PT. Lucas Djaja is sufficient, this can be seen from the data obtained from the questionnaire filled out by the respondents, which is related to the control environment, risk assessment, information and communication, control activities, and monitoring. Meanwhile that of the effectiveness of the production target is still this can be seen from the data obtained from the questionnaire filled out by the respondents, ranging from productivity, quality, efficiency, flexibility, excellence, development, and satisfaction. And the obtained results of the research stating that the internal control effect on effectiveness production targets with determination coefficient of 56.01% and the remaining 43.99% influenced by other factors.

  14. Soil erodibility in Europe: a high-resolution dataset based on LUCAS.

    Science.gov (United States)

    Panagos, Panos; Meusburger, Katrin; Ballabio, Cristiano; Borrelli, Pasqualle; Alewell, Christine

    2014-05-01

    The greatest obstacle to soil erosion modelling at larger spatial scales is the lack of data on soil characteristics. One key parameter for modelling soil erosion is the soil erodibility, expressed as the K-factor in the widely used soil erosion model, the Universal Soil Loss Equation (USLE) and its revised version (RUSLE). The K-factor, which expresses the susceptibility of a soil to erode, is related to soil properties such as organic matter content, soil texture, soil structure and permeability. With the Land Use/Cover Area frame Survey (LUCAS) soil survey in 2009 a pan-European soil dataset is available for the first time, consisting of around 20,000 points across 25 Member States of the European Union. The aim of this study is the generation of a harmonised high-resolution soil erodibility map (with a grid cell size of 500 m) for the 25 EU Member States. Soil erodibility was calculated for the LUCAS survey points using the nomograph of Wischmeier and Smith (1978). A Cubist regression model was applied to correlate spatial data such as latitude, longitude, remotely sensed and terrain features in order to develop a high-resolution soil erodibility map. The mean K-factor for Europe was estimated at 0.032 thahha(-1)MJ(-1)mm(-1) with a standard deviation of 0.009 thahha(-1)MJ(-1)mm(-1). The yielded soil erodibility dataset compared well with the published local and regional soil erodibility data. However, the incorporation of the protective effect of surface stone cover, which is usually not considered for the soil erodibility calculations, resulted in an average 15% decrease of the K-factor. The exclusion of this effect in K-factor calculations is likely to result in an overestimation of soil erosion, particularly for the Mediterranean countries, where highest percentages of surface stone cover were observed. Copyright © 2014. Published by Elsevier B.V.

  15. Corpuls cpr resuscitation device generates superior emulated flows and pressures than LUCAS II in a mechanical thorax model.

    Science.gov (United States)

    Eichhorn, S; Mendoza Garcia, A; Polski, M; Spindler, J; Stroh, A; Heller, M; Lange, R; Krane, M

    2017-06-01

    The provision of sufficient chest compression is among the most important factors influencing patient survival during cardiopulmonary resuscitation (CPR). One approach to optimize the quality of chest compressions is to use mechanical-resuscitation devices. The aim of this study was to compare a new device for chest compression (corpuls cpr) with an established device (LUCAS II). We used a mechanical thorax model consisting of a chest with variable stiffness and an integrated heart chamber which generated blood flow dependent on the compression depth and waveform. The method of blood-flow generation could be changed between direct cardiac-compression mode and thoracic-pump mode. Different chest-stiffness settings and compression modes were tested to generate various blood-flow profiles. Additionally, an endurance test at high stiffness was performed to measure overall performance and compression consistency. Both resuscitation machines were able to compress the model thorax with a frequency of 100/min and a depth of 5 cm, independent of the chosen chest stiffness. Both devices passed the endurance test without difficulty. The corpuls cpr device was able to generate about 10-40% more blood flow than the LUCAS II device, depending on the model settings. In most scenarios, the corpuls cpr device also generated a higher blood pressure than the LUCAS II. The peak compression forces during CPR were about 30% higher using the corpuls cpr device than with the LUCAS II. In this study, the corpuls cpr device had improved blood flow and pressure outcomes than the LUCAS II device. Further examination in an animal model is required to prove the findings of this preliminary study.

  16. KT seminar on entrepreneurship | "From CERN engineer to company founder: my journey" by Julio Lucas | 26 September

    CERN Multimedia

    2016-01-01

    Europe needs its economy to be boosted by the ideas of its most talented scientists and engineers. One of the best ways in which these ideas may contribute to society is by creating a new business. In this Knowledge Transfer seminar, Julio Lucas, Technical Director and co-founder of Elytt Energy and former CERN engineer gives a personal view on how to make your first steps in entrepreneurship.    

  17. A description of the Larva of Metapteron xanthomelas (Lucas, 1857) from the Restinga Forest of Southeastern Brazil (Coleoptera: Lycidae, Calopterini).

    Science.gov (United States)

    Ferreira, Vinicius De Souza; Costa, Cleide

    2015-02-03

    The last instar larva of Metapteron xanthomelas (Lucas, 1857) is described. This is the first description of a larva for the genus. Two live larvae collected in the Brazilian Atlantic coast Restinga Forest of Itanhaém, São Paulo, were reared, one to adult and one was fixed in the last instar. This larva differs from the known Calopterini larvae by the absence of urogomphi, the dorsal abdominal segments undivided and strongly alveolate ornamentation on the head. 

  18. Vorrei ma non posso. L'esperienza del non realizzato nella pratica artistica contemporanea. Un'intervista con Luca Trevisani

    Directory of Open Access Journals (Sweden)

    Valentina Rossi

    2014-12-01

    Full Text Available Le domande in questa intervista seguono e riprendono l’intervento di Luca Trevisani al convegno tenutosi nel novembre del 2013 presso il Museo del Novecento di Milano. Trevisani era stato invitato per “rappresentare” una nuova generazione di artisti, che, nati tra gli anni Settanta e i primi anni Ottanta si sono trovati ad operare proprio all’inizio del nuovo millennio.

  19. Geological evolution of the Serrania de San Lucas, north of the Magdalena valley and northwest of the Eastern Cordillera

    International Nuclear Information System (INIS)

    Clavijo, Jairo; Mantilla, Luis; Pinto, Jorge; Bernal, Luis; Perez, Adrian

    2008-01-01

    Development of the Serrania de San Lucas was determinate by eight tectonostratigraphic events: 1) Proterozoic Metamorphic Event, 2) Early Paleozoic Metamorphic Event, 3) Late Triassic - Early Jurassic Volcaniclastic Event, 3a) Middle Jurassic Magmatic Stage, 4) Late Jurassic Magmatic Event, 5) Late Jurassic Sedimentary Event 6) Cretacic -Early Eocene Sedimentary Event, 6a) Albian Late Cretacic Magmatic Stage, 7) Eocene-Oligocene Tectonic Inversion Event, 8) Miocene-Present Event.

  20. Gender Discrimination, Education and Economic Growth in a Generalized Uzawa-Lucas Two-Sector Model

    Directory of Open Access Journals (Sweden)

    Zhang Wei-Bin

    2014-06-01

    Full Text Available This paper is mainly concerned with relationships between economic growth and gender discrimination in labor markets and education. Although discrimination in different fields has well been addresses and modelled in the economic literature, there are only a few growth models with endogenous wealth and human capital accumulation, gender time distribution between work, leisure and education under gender (positive or negative discrimination. The production and economic structures, human capital accumulation are based on the Uzawa-Lucas model, while the utility function and gender division of labor, leisure time and study time are based on the model by Zhang. The model takes account of learning by education in modeling human capital accumulation. We simulate the model to demonstrate the existence of equilibrium points and motion of the national economy. We also conduct a comparative dynamic analysis in regard to changes in discrimination in the education sector, women’s propensity to stay at home, women’s propensity to receive education, women’s knowledge utilization efficiency, and the propensity to save.

  1. Environmental and effluent monitoring at Lucas Heights Science and Technology Centre, 1998

    International Nuclear Information System (INIS)

    Hoffmann, E.L.; Loosz, T.; Farrar, Y.; Mokhber-Shahin, L.

    1999-01-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Science and Technology Centre (LHSTC) during 1998. All low-level liquid and gaseous effluent discharges complied with existing discharge authorizations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges from HIFAR were estimated utilising the PC-Cream atmospheric dispersion and dosimetry code. The potential effective dose to the public was estimated to be less than 0.010 mSv/year for all receptor locations on the 1.6 km buffer zone boundary around the HIFAR research reactor. This value represents 1% of the 1 mSv/year dose limit for long term exposure that is recommended by the National Health and Medical Research Council and 3.3% of the site dose constraint of 0.3 mSv/year approved by the Nuclear Safety Bureau. It is concluded that there is no impact on the health of the community, staff or the environment as a consequence of operations at the LHSTC

  2. Express determination of the volume 222Rn activity using the Lucas Type scintillation cells

    International Nuclear Information System (INIS)

    Muellerova, M.; Holy, K.; Polaskova, A.

    2006-01-01

    This report deals with the possibility of the accurate determination of the volume radon activity using the Lucas type scintillation chamber before the radioactive equilibrium between the radon and its decay products is achieved. This method allows to obtain data about the volume activity of the sample promptly and also it offers a possibility to apply the detector for measurements more times a day. We developed a method for the determination of the detection efficiency of the scintillation chamber for varied time periods after the chamber was filled up with a sample. The volume radon activity calculated from the count rates in saturated conditions is in a good agreement with the volume radon activity calculated from our derived relation. It was shown that the scintillation chamber can be used for the express determination of the volume radon activity. The time between the individual applications of the scintillation chamber can be compressed maintaining of sufficient accuracy of the determination of the volume radon activity. (authors)

  3. Environmental and effluent monitoring at Lucas Heights Science and Technology Centre, 1998

    Energy Technology Data Exchange (ETDEWEB)

    Hoffmann, E L; Loosz, T; Farrar, Y; Mokhber-Shahin, L

    1999-07-01

    Results are presented of environmental and effluent monitoring conducted in the vicinity of the Lucas Heights Science and Technology Centre (LHSTC) during 1998. All low-level liquid and gaseous effluent discharges complied with existing discharge authorizations and relevant environmental regulations. Potential effective doses to the general public from controlled airborne discharges from HIFAR were estimated utilising the PC-Cream atmospheric dispersion and dosimetry code. The potential effective dose to the public was estimated to be less than 0.010 mSv/year for all receptor locations on the 1.6 km buffer zone boundary around the HIFAR research reactor. This value represents 1% of the 1 mSv/year dose limit for long term exposure that is recommended by the National Health and Medical Research Council and 3.3% of the site dose constraint of 0.3 mSv/year approved by the Nuclear Safety Bureau. It is concluded that there is no impact on the health of the community, staff or the environment as a consequence of operations at the LHSTC.

  4. On the spectral norms of r-circulant matrices with the biperiodic Fibonacci and Lucas numbers

    Directory of Open Access Journals (Sweden)

    Cahit Köme

    2017-08-01

    Full Text Available Abstract In this paper, we present new upper and lower bounds for the spectral norms of the r-circulant matrices Q = C r ( ( b a ξ ( 1 2 q 0 , ( b a ξ ( 2 2 q 1 , ( b a ξ ( 3 2 q 2 , … , ( b a ξ ( n 2 q n − 1 $Q=C_{r} ( (\\frac{b}{a} ^{\\frac{\\xi (1}{2}}q_{0}, (\\frac{b}{a} ^{\\frac{\\xi(2}{2}}q_{1}, (\\frac {b}{a} ^{\\frac{\\xi(3}{2}}q_{2}, \\dots, (\\frac{b}{a} ^{\\frac{\\xi(n}{2}}q_{n-1} $ and L = C r ( ( b a ξ ( 0 2 l 0 , ( b a ξ ( 1 2 l 1 , ( b a ξ ( 2 2 l 2 , … , ( b a ξ ( n − 1 2 l n − 1 $L=C_{r} ( (\\frac {b}{a} ^{\\frac{\\xi(0}{2}}l_{0}, (\\frac{b}{a} ^{\\frac{\\xi (1}{2}}l_{1}, (\\frac{b}{a} ^{\\frac{\\xi(2}{2}}l_{2}, \\dots, (\\frac{b}{a} ^{\\frac{\\xi(n-1}{2}}l_{n-1} $ whose entries are the biperiodic Fibonacci and biperiodic Lucas numbers, respectively. Finally, we obtain lower and upper bounds for the spectral norms of Kronecker and Hadamard products of Q and L matrices.

  5. Review of the ANSTO submission on the site geological investigations for the RRR at Lucas Heights

    International Nuclear Information System (INIS)

    2002-01-01

    Preliminary Safety Analysis Report (PSAR) and ANSTO's Consolidated Seismic Report were reviewed by ARPANSA's Regulatory Branch, and by an IAEA consultant to ARPANSA. It included a recommendation by the IAEA Peer Review Team (June 2001) that an additional study be undertaken for the Lucas Heights site in accordance with IAEA Safety Guide 50-SG-S1. In particular this related to regional and local investigations to determine whether there exists a potential for surface faulting at the site area, to formulate the investigations that should be used to determine whether or not any faults in the area should be considered capable. The CEO of ARPANSA requested ANSTO to undertake such a task. The reviews that have been undertaken by experts from Geoscience Australia and the IAEA expert contracted by ARPANSA give confidence that the seismic design of the reactor structures, systems, and components important for safety should not be affected by the fault through the excavations for the foundations of the reactor building. The basis is the conclusions reached by these experts that the fault discovered is very old and not capable under either the USNRC Criteria or the IAEA Criteria. It is not now active, has not been active in the geologically recent past and is unlikely to re-activate within the foreseeable lifespan of the proposed facility. Consequently, this pre-existing fault presents no greater risk than the surrounding unfaulted material. Thus, the replacement reactor need not be designed for such displacement. The existence of this 'incapable' fault does not impact on the probabilistic seismic hazard assessment from which the seismic design basis for the reactor was derived. Therefore, the existing design response spectrum accepted in the Regulatory Assessment Report as the basis for seismic design of structures, systems and components, and approved in the Construction Licence, has not changed and remains adequately conservative with regard to vibratory motion at the site

  6. A novel methodology for online measurement of thoron using Lucas scintillation cell

    International Nuclear Information System (INIS)

    Eappen, K.P.; Sapra, B.K.; Mayya, Y.S.

    2007-01-01

    The use of Lucas scintillation cell (LSC) technique for thoron estimation requires a modified methodology as opposed to radon estimation. While in the latter, the α counting is performed after a delay period varying between few hours to few days, in the case of thoron estimation the α counting has to be carried out immediately after sampling owing to the short half-life of thoron (55 s). This can be achieved best by having an on-line LSC sampling and counting system. However, half-life of the thoron decay product 212 Pb being 10.6 h, the background accumulates in LSC during online measurements and hence subsequent use of LSC is erroneous unless normal background level is achieved in the cell. This problem can be circumvented by correcting for the average background counts accumulated during the counting period which may be theoretically estimated. In this study, a methodology has been developed to estimate the true counts due to thoron. A linear regression between the counts obtained experimentally and the fractional decay in regular intervals of time is used to obtain the actual thoron concentration. The novelty of this approach is that the background of the cell is automatically estimated as the intercept of the regression graph. The results obtained by this technique compare well with the two filter method and the thoron concentration produced from a standard thoron source. However, the LSC as such cannot be used for environmental samples because the minimum detection level is comparable with that of thoron concentrations prevailing in normal atmosphere

  7. In-hospital fall-risk screening in 4,735 geriatric patients from the LUCAS project.

    Science.gov (United States)

    Neumann, L; Hoffmann, V S; Golgert, S; Hasford, J; Von Renteln-Kruse, W

    2013-03-01

    In-hospital falls in older patients are frequent, but the identification of patients at risk of falling is challenging. Aim of this study was to improve the identification of high-risk patients. Therefore, a simplified screening-tool was developed, validated, and compared to the STRATIFY predictive accuracy. Retrospective analysis of 4,735 patients; evaluation of predictive accuracy of STRATIFY and its single risk factors, as well as age, gender and psychotropic medication; splitting the dataset into a learning and a validation sample for modelling fall-risk screening and independent, temporal validation. Geriatric clinic at an academic teaching hospital in Hamburg, Germany. 4,735 hospitalised patients ≥65 years. Sensitivity, specificity, positive and negative predictive value, Odds Ratios, Youden-Index and the rates of falls and fallers were calculated. There were 10.7% fallers, and the fall rate was 7.9/1,000 hospital days. In the learning sample, mental alteration (OR 2.9), fall history (OR 2.1), and insecure mobility (Barthel-Index items 'transfer' + 'walking' score = 5, 10 or 15) (OR 2.3) had the most strongest association to falls. The LUCAS Fall-Risk Screening uses these risk factors, and patients with ≥2 risk factors contributed to the high-risk group (30.9%). In the validation sample, STRATIFY SENS was 56.8, SPEC 59.6, PPV 13.5 and NPV 92.6 vs. LUCAS Fall-Risk Screening was SENS 46.0, SPEC 71.1, PPV 14.9 and NPV 92.3. Both the STRATIFY and the LUCAS Fall-Risk Screening showed comparable results in defining a high-risk group. Impaired mobility and cognitive status were closely associated to falls. The results do underscore the importance of functional status as essential fall-risk factor in older hospitalised patients.

  8. Prolonged closed cardiac massage using LUCAS device in out-of-hospital cardiac arrest with prolonged transport time

    Directory of Open Access Journals (Sweden)

    Edouard Matevossian

    2009-04-01

    Full Text Available Edouard Matevossian1, Dietrich Doll4, Jakob Säckl1, Inga Sinicina5, Jürgen Schneider2, Gerhard Simon3, Norbert Hüser11Department of Surgery, 2Department of Anesthesiology and Intensive-Care Medicine; 3Department of Radiology, Technische Universität of Munich, Germany; 4Department of Visceral, Vascular and Thoracic Surgery, Philips University of Marburg, Marburg, Germany; 5Institute of Clinical Forensic Medicine, Ludwig-Maximilian University of Munich, Munich, GermanyAbstract: Saving more human lives through more effective reanimation measures is the goal of the new international guidelines on cardiopulmonary resuscitation as the decisive aspect for survival after cardiovascular arrest is that basic resuscitation should start immediately. According to the updated guidelines, the greatest efficacy in cardiac massage is only achieved when the right compression point, an adequate compression depth, vertical pressure, the correct frequency, and equally long phases of compression and decompression are achieved. The very highest priority is placed on restoring continuous circulation. Against this background, standardized continuous chest compression with active decompression has contributed to a favorable outcome in this case. The hydraulically operated and variably adjustable automatic Lund University Cardiac Arrest System (LUCAS device (Jolife, Lund, Sweden undoubtedly meets these requirements. This case report describes a 44-year-old patient who – approximately 15 min after the onset of clinical death due to apparent ventricular fibrillation – received cardiopulmonary resuscitation, initially by laypersons and then by the emergency medical team (manual chest compressions followed by situation-adjusted LUCAS compressions. Sinus rhythm was restored after more than 90 min of continuous resuscitation, with seven defibrillations. Interventional diagnostic workup did not reveal a causal morphological correlate for the condition on coronary

  9. Diet of blue marlin Makaira mazara off the coast of Cabo San Lucas, Baja California Sur, Mexico

    OpenAIRE

    Abitia Cárdenas, Leonardo Andrés; Galván Magaña, Felipe; Gutiérrez Sánchez, Francisco Javier; Rodríguez Romero, Jesús; Aguilar Palomino, Bernabé; Moehl Hitz, Almiae

    1999-01-01

    Analysis of the stomach contents of 204 blue marlin (Makaira mazara) caught by the sport-fishing fleet of Cabo San Lucas in the southern Gulf of California is presented. The specimens sampled were caught during the summer and fall of 1987, 1988, and 1989 when the sea is warm (28-30°C). Blue marlin were found to feed on 35 prey species, 3 of which represented 90% of the total stomach contents by frequency of occurrence. The main prey were epipelagic organisms from the oceanic zone and demersal...

  10. Moderate Bravery

    DEFF Research Database (Denmark)

    Majgaard, Klaus

    2016-01-01

    Purpose: The ability to act in a purposeful and effective way amid institutional tensions and paradoxes is, right now, a highly prized quality in public leadership. The purpose of this chapter is to qualify moderately brave acts as a learning format that combines the analytical and performative...

  11. Transport of HIFAR spent fuel from Lucas Heights Research Establishment to the United Kingdom for reprocessing. Public Environmental Report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-10-27

    The normal operations of HIFAR produce thirty-eight spent fuel elements annually. Since 1958, when operations began, 1,660 spent fuel elements have been accumulated and are stored in ANSTO`s engineered interim storage facilities at Lucas Heights. In the light of the limited size of these storage facilities and following the Research Reactor Review (1993) and an Inter-Agency Review, the Commonwealth Government announced its decision to reduce the number of spent fuel elements stored at the site. Therefore, ANSTO has been authorised to negotiate the terms for shipment of spent fuel elements of United Kingdom (UK) origin to the Dounreay reprocessing plant in Scotland. This Public Environment Report, prepared under the Environment Protection (Impact of Proposals) Act 1974, describes the potential impacts and risks of a proposed initial shipment of 120 spent fuel elements to the Dounreay reprocessing plant. It describes the intended packaging and transport procedures and considers possible alternative methods of dealing with the continued production of spent fuel rods and the limited storage capacity at LHRL. The exhaustive analysis of every phase of operations involved in the shipping of a cask of spent HIFAR fuel elements from Lucas Heights to Dounreay, for reprocessing, has shown that there are no significant environmental or public health impacts from such a shipment conducted in accordance with standard, internationally established procedures. 18 refs., 12 tabs., 2 figs.

  12. Transport of HIFAR spent fuel from Lucas Heights Research Establishment to the United Kingdom for reprocessing. Public Environmental Report

    International Nuclear Information System (INIS)

    1995-01-01

    The normal operations of HIFAR produce thirty-eight spent fuel elements annually. Since 1958, when operations began, 1,660 spent fuel elements have been accumulated and are stored in ANSTO's engineered interim storage facilities at Lucas Heights. In the light of the limited size of these storage facilities and following the Research Reactor Review (1993) and an Inter-Agency Review, the Commonwealth Government announced its decision to reduce the number of spent fuel elements stored at the site. Therefore, ANSTO has been authorised to negotiate the terms for shipment of spent fuel elements of United Kingdom (UK) origin to the Dounreay reprocessing plant in Scotland. This Public Environment Report, prepared under the Environment Protection (Impact of Proposals) Act 1974, describes the potential impacts and risks of a proposed initial shipment of 120 spent fuel elements to the Dounreay reprocessing plant. It describes the intended packaging and transport procedures and considers possible alternative methods of dealing with the continued production of spent fuel rods and the limited storage capacity at LHRL. The exhaustive analysis of every phase of operations involved in the shipping of a cask of spent HIFAR fuel elements from Lucas Heights to Dounreay, for reprocessing, has shown that there are no significant environmental or public health impacts from such a shipment conducted in accordance with standard, internationally established procedures. 18 refs., 12 tabs., 2 figs

  13. A new methodology for pixel-quantitative precipitation nowcasting using a pyramid Lucas Kanade optical flow approach

    Science.gov (United States)

    Liu, Yu; Xi, Du-Gang; Li, Zhao-Liang; Hong, Yang

    2015-10-01

    Short-term high-resolution Quantitative Precipitation Nowcasting (QPN) has important implications for navigation, flood forecasting, and other hydrological and meteorological concerns. This study proposes a new algorithm called Pixel-based QPN using the Pyramid Lucas-Kanade Optical Flow method (PPLK), which comprises three steps: employing a Pyramid Lucas-Kanade Optical Flow method (PLKOF) to estimate precipitation advection, projecting rainy clouds by considering the advection and evolution pixel by pixel, and interpolating QPN imagery based on the space-time continuum of cloud patches. The PPLK methodology was evaluated with 2338 images from the geostationary meteorological satellite Fengyun-2F (FY-2F) of China and compared with two other advection-based methods, i.e., the maximum correlation method and the Horn-Schunck Optical Flow scheme. The data sample covered all intensive observations since the launch of FY-2F, despite covering a total of only approximately 10 days. The results show that the PPLK performed better than the algorithms used for comparison, demonstrating less time expenditure, more effective cloud tracking, and improved QPN accuracy.

  14. A simple method for calibration of Lucas scintillation cell counting system for measurement of 226Ra and 222Rn

    Directory of Open Access Journals (Sweden)

    N.K. Sethy

    2014-10-01

    Full Text Available Known quantity of radium from high grade ore solution was chemically separated and carefully kept inside the cavity of a Lucas Cell (LC. The 222Rn gradually builds up and attain secular equilibrium with its parent 226Ra. This gives a steady count after a suitable buildup period (>25 days. This secondary source was used to calibrate the radon counting system. The method is validated in by comparison with identical measurement with AlphaGuard Aquakit. The radon counting system was used to evaluate dissolved radon in ground water sample by gross alpha counting in LC. Radon counting system measures the collected radon after a delay of >180 min by gross alpha counting. Simultaneous measurement also carried out by AlphaGuard Aquakit in identical condition. AlphaGuard measures dissolved radon from water sample by constant aeration in a closed circuit without giving any delay. Both the methods are matching with a correlation coefficient of >0.9. This validates the calibration of Lucas scintillation cell counting system by designed encapsulated source. This study provides an alternative for calibration in absence of costly Radon source available in the market.

  15. Corpuls CPR Generates Higher Mean Arterial Pressure Than LUCAS II in a Pig Model of Cardiac Arrest

    Directory of Open Access Journals (Sweden)

    S. Eichhorn

    2017-01-01

    Full Text Available According to the European Resuscitation Council guidelines, the use of mechanical chest compression devices is a reasonable alternative in situations where manual chest compression is impractical or compromises provider safety. The aim of this study is to compare the performance of a recently developed chest compression device (Corpuls CPR with an established system (LUCAS II in a pig model. Methods. Pigs (n = 5/group in provoked ventricular fibrillation were left untreated for 5 minutes, after which 15 min of cardiopulmonary resuscitation was performed with chest compressions. After 15 min, defibrillation was performed every 2 min if necessary, and up to 3 doses of adrenaline were given. If there was no return of spontaneous circulation after 25 min, the experiment was terminated. Coronary perfusion pressure, carotid blood flow, end-expiratory CO2, regional oxygen saturation by near infrared spectroscopy, blood gas, and local organ perfusion with fluorescent labelled microspheres were measured at baseline and during resuscitation. Results. Animals treated with Corpuls CPR had significantly higher mean arterial pressures during resuscitation, along with a detectable trend of greater carotid blood flow and organ perfusion. Conclusion. Chest compressions with the Corpuls CPR device generated significantly higher mean arterial pressures than compressions performed with the LUCAS II device.

  16. Safety of mechanical chest compression devices AutoPulse and LUCAS in cardiac arrest: a randomized clinical trial for non-inferiority

    NARCIS (Netherlands)

    Koster, Rudolph W.; Beenen, Ludo F.; van der Boom, Esther B.; Spijkerboer, Anje M.; Tepaske, Robert; van der Wal, Allart C.; Beesems, Stefanie G.; Tijssen, Jan G.

    2017-01-01

    Aims Mechanical chest compression (CC) during cardiopulmonary resuscitation (CPR) with AutoPulse or LUCAS devices has not improved survival from cardiac arrest. Cohort studies suggest risk of excess damage. We studied safety of mechanical CC and determined possible excess damage compared with manual

  17. A revision of the purse-web spider genus Calommata Lucas, 1837 (Araneae, Atypidae in the Afrotropical Region

    Directory of Open Access Journals (Sweden)

    Rene Fourie

    2011-05-01

    Full Text Available The purse-web spider genus Calommata Lucas, 1837 is revised in the Afrotropical Region. Following examination of the female type material, C. transvaalica Hewitt, 1916 is removed from synonymy with C. simoni Pocock, 1903 and revalidated. The females of both species are redescribed and their males described for the first time. While C. simoni is very widespread across tropical Africa, C. transvaalica is endemic to northern South Africa. Four new species are described, all known only from males: C. megae sp. n. (Zimbabwe, C. meridionalis sp. n. (South Africa, C. namibica sp. n. (Namibia and C. tibialis sp. n. (Ivory Coast and Togo. Notes are presented on the biology of each species.

  18. Acidente rural ampliado: o caso das "chuvas" de agrotóxicos sobre a cidade de Lucas do Rio Verde - MT Major rural accident: the pesticide "rain" case in Lucas do Rio Verde city - MT

    Directory of Open Access Journals (Sweden)

    Wanderlei Antonio Pignati

    2007-03-01

    Full Text Available O artigo aborda o acidente ambiental causado por derivas de pulverizações aéreas de agrotóxico que atingiram o espaço urbano de Lucas do Rio Verde-MT, em março de 2006. Caracterizou-se como "acidente rural ampliado" de caráter ocupacional e ambiental, cuja gravidade e extensão ultrapassaram a unidade produtiva rural, causando impactos sanitários, sociais e ambientais. Este estudo de caso objetivou conhecer o cenário sociotécnico do acidente e o processo de vigilância em saúde-ambiente, numa dinâmica de pesquisa-ação. As informações foram colhidas através de entrevistas, documentos e registro de observações do cotidiano. Referenciou-se ainda na análise interdisciplinar e participativa de acidentes, com envolvimento de instituições locais de Saúde, Agricultura e Ambiente, lideranças sindicais e políticas, chacareiros e fazendeiros, Promotoria de Justiça, jornalistas e a Universidade. O estudo mostra que as ações de vigilância do "uso e abuso" de agrotóxicos ampliaram-se para "movimento pelo desenvolvimento sustentável da região", apoiado na vigilância participativa, articulada com a luta pela democracia e justiça social, na busca de uma agricultura e/ou ambiente sustentável.The article reports the environmental accident caused by aerial pesticide spraying that reached the urban space of Lucas do Rio Verde-MT, in March 2006. It was characterized as a "major rural accident" of environmental and occupational aspects whose seriousness and extension crossed the agriculturally productive unit boundaries causing sanitary, social and environmental impact. This case study had as its objective the understanding of the social-technical scene of the accident and the monitoring process in health-environment in a research-action dynamic. The information was collected through interviews, documents and daily observation reports. It also referred to accidents, multidisciplinary and participatory analyses with the participation

  19. Response to critique by lucas et al. (2009) of paper by Fassett (2009) documenting Paleocene dinosaurs in the San Juan Basin

    Science.gov (United States)

    Fassett, J.E.

    2009-01-01

    In this issue of Palaeontologia Electronica Lucas, et al. (2009) question the validity f the Fassett (2009) paper that presented evidence for Paleocene dinosaurs in the San Juan Basin of New Mexico and Colorado. Their challenges focus primarily on the lithostratigraphy, palynology, and paleomagnetism of the dinosaur-bearing Ojo Alamo Sandstone, shown by Fassett to be of Paleocene age. The lithostratigraphy of the Ojo Alamo is addressed by Lucas et al. (2009) based on detailed studies of outcrops of this formation in two relatively small areas in the southern San Juan Basin where Ojo Alamo dinosaur fossils have been found. When viewed over its 13,000 km2 extent, the Ojo Alamo is seen to be a much more complex formation than these authors recognize, thus their perception and description of the lithostratigraphy of this rock unit is limited and provincial. Fassett (2009) presented a detailed discussion of the palynology of the rocks adjacent to the Cretaceous-Tertiary (K-T) interface in the San Juan Basin, including a 67-page appendix and 25 tables listing the 244 palynomorph species identified from these strata. The Ojo Alamo Sandstone produced 103 palynomorphs from five principal localities including one especially prolific sample set from drill core through K-T strata. Without exception, all samples collected from the Ojo Alamo Sandstone for palynologic analysis were found to contain Paleocene palynomorph assemblages. Lucas et al. challenge only one Ojo Alamo palynomorph assemblage from one of the five areas studied, stating that they were unable to find palynomorph-productive samples at that locality. They submit no new palynologic data that refutes the Paleocene palynologic age of the Ojo Alamo Sandstone. In addressing the paleomagnetism of the Ojo Alamo, these authors dismiss the presence of a critical normal-polarity magnetochron discovered in the lower part of the Ojo Alamo - magnetochron C29n.2n of Fassett (2009) with no evidence to justify this dismissal

  20. En híbrida mezcolanza: Exile and Cultural Anxiety in Alirio Díaz Guerra’s Lucas Guevara

    Directory of Open Access Journals (Sweden)

    Jeffrey Browitt

    2005-03-01

    Full Text Available The novel Lucas Guevara, written by the Colombian exile, Alirio Díaz Guerra, was first published in New York in 1914. It is considered to be the earliest novel about Latin American immigration to the United States written in Spanish. This fact alone merits its study. A second edition was published in 2001 along with a critical-biographical introduction, which presents the novel as the precursor of a developing genre of Hispanic immigrant literature centred on the naïve Latin American migrant who arrives in the United States inspired by the opportunities which the metropolis supposedly affords, but who nevertheless suffers a series of misfortunes because of the inability to adapt to the new culture. On the level of overt content, the novel is a lachrymose, stereotypical and conventional denunciation of the supposed evils of an amoral US society and the libertine and materialistic values underpinning it. But on a much deeper level, a picture emerges of Díaz Guerra himself as a displaced, disenchanted intellectual exile who suffers (or has suffered an acute cultural and class anxiety in the transition from a patrician Arcadia to the heart of capitalist, industrial modernity. Through a reading of the narrative voice, and by extension the implied author, we witness his difficult coming to terms with a highly-charged New York society (in comparison to his homeland, not only because of the sexual liberation brought on by secular modernization, but also because of the close proximity of volatile, eroticised bodies on the over-crowded Lower East Side of New York, the scene of the novel and Díaz Guerra’s point of entry into the United States. The novel also provides an occasion to contrast how Díaz Guerra deals with the condition of exile, in contrast to that most emblematic of Latin American political refugees, José Martí.

  1. Cultivation of Aschersonia placenta Berkeley and Broom and its efficacy for controlling Parlatoria ziziphi (Lucas (Hemiptera: Diaspididae

    Directory of Open Access Journals (Sweden)

    Dokgluaymai Homrahud

    2016-05-01

    Full Text Available The entomopathogenic fungus genus Aschersonia (Deuteromycotina: Hyphomycetes is host specific to some aleyrodids and scale insects. In search of the Thai endemic species, fungus samples were isolated from cadavers of citrus whiteflies (Aleyrodes tabaci Gennadius found in citrus orchards in Trat province, Thailand. After morphological analysis and scanning electron microscopic examination, it was identified as Aschersonia placenta Berkeley and Broom. Seven synthetic media, namely: potato dextrose agar (PDA, PDA with pasteurized milk (Foremost® (PDA + M, Sabouraud dextrose agar with yeast extract (SDAY, SDA with pasteurized milk (Foremost® (SDA + M, corn meal agar (CMA, water agar with juice of eight vegetable species (V8® (WA + V8 and WA were explored as appropriate media for fungal cultivation. SDAY and SDA + M gave the best colony radial growth, producing 2.04 ± 0.13 cm and 2.09 ± 0.10 cm in 21 d, respectively. However, based on the ability of A. placenta to produce conidia, PDA and SDAY which produced 2.59 × 108 conidia/mL and 2.69 × 108 conidia/mL, respectively, were considered as the most suitable media for this fungal species. The efficiency assessment of A. placenta for controlling black parlatoria (Parlatoria ziziphi (Lucas, indicated that a conidial suspension at 1 × 109 conidia/mL gave 23.73% and 27.42% mortality at 14 and 21 d post inoculation, respectively.

  2. Pro-Active Fall-Risk Management is Mandatory to Sustain in Hospital-Fall Prevention in Older Patients--Validation of the LUCAS Fall-Risk Screening in 2,337 Patients.

    Science.gov (United States)

    Hoffmann, V S; Neumann, L; Golgert, S; von Renteln-Kruse, W

    2015-12-01

    Prevention of in-hospital falls contributes to improvement of patient safety. However, the identification of high-risk patients remains a challenge despite knowledge of fall-risk factors. Hence, objective was to prospectively validate the performance of the LUCAS (Longitudinal Urban Cohort Ageing Study) fall-risk screening, based on routine data (fall history, mobility, mental status) and applied by nurses. Observational study comparing two groups of patients who underwent different fall-risk screenings; the LUCAS screening (2010 - 2011) and the STRATIFY (St. Thomas's Risk Assessment Tool In Falling Elderly Inpatients) (2004 - 2006). Urban teaching hospital. Consecutively hospitalized patients (≥ 65 years old) were screened on admission; LUCAS n = 2,337, STRATIFY n = 4,735. The proportions of fallers were compared between the STRATIFY and the LUCAS time periods. The number of fallers expected was compared to that observed in the LUCAS time period. Standardized fall-incidence recording included case-note checks for unreported falls. Plausibility checks of fall-risk factors and logistic regression analysis for variable fall-risk factors were performed. The proportions of fallers during the two time periods were LUCAS n = 291/2,337 (12.5%) vs. STRATIFY n = 508/4,735 (10.7%). After adjustment for risk-factor prevalence, the proportion of fallers expected was 14.5% (334/2,337), the proportion observed was 12.5% (291/2,337) (p = 0.038). In-hospital fall prevention including systematic use of the LUCAS fall-risk screening reduced the proportion of fallers compared to that expected from the patients' fall-risk profile. Raw proportions of fallers are not suitable to evaluate fall prevention in hospital because of variable prevalence of patients' fall-risk factors over time. Continuous communication, education and training is needed to sustain in-hospital falls prevention.

  3. Per Luca Ronconi (1933-2015: quasi una «leçon de ténèbres»

    Directory of Open Access Journals (Sweden)

    Claudio Longhi

    2016-06-01

    Full Text Available The recent death of Luca Ronconi (February 21st, 2015 became the occasion to retrace his artistic path, of a forever restless ‘adolescent’, and to understand better his typical traits. Among projects that will remain forever unfulfilled, titanic failures and visionary shows, the keystone of the poetics of Ronconi turns out to be an inexhaustible search of the infinite, in a dialectic between the exceeding of the limit and the strenuous comparison with its inescapable necessity. The theatre of Ronconi, in its giddy pursuit of ‘what has no end’, confesses its most genuine nature: an ‘anatomical’ theatre of death.

  4. Analysis of the stormwater drainage of the historic walls of Cartagena de Indias between the bastions of San Lucas, Santa Catalina and Santa Clara

    Science.gov (United States)

    Utria, A.; Saba, M.; Quiñones-Bolaños, E.

    2017-12-01

    The city walls of Cartagena between the Baluarte of San Lucas and Santa Clara reflects the consequences of poor stormwater drainage. In the present investigation the current drainage state of this area have been evaluated, assessing its sizing and conditions to be then modelled through SWMM 5 software for return periods of 5, 10, 15 and 20 years respectively. Finally, it has been determined that the physical deterioration of the drainage elements justifies the malfunction of the whole system, therefore cleaning and periodic maintenance of the drainage elements is strongly suggested.

  5. The Invertibility, Explicit Determinants, and Inverses of Circulant and Left Circulant and g-Circulant Matrices Involving Any Continuous Fibonacci and Lucas Numbers

    Directory of Open Access Journals (Sweden)

    Zhaolin Jiang

    2014-01-01

    Full Text Available Circulant matrices play an important role in solving delay differential equations. In this paper, circulant type matrices including the circulant and left circulant and g-circulant matrices with any continuous Fibonacci and Lucas numbers are considered. Firstly, the invertibility of the circulant matrix is discussed and the explicit determinant and the inverse matrices by constructing the transformation matrices are presented. Furthermore, the invertibility of the left circulant and g-circulant matrices is also studied. We obtain the explicit determinants and the inverse matrices of the left circulant and g-circulant matrices by utilizing the relationship between left circulant, g-circulant matrices and circulant matrix, respectively.

  6. Final guidelines for an Environmental Impact Statement on the proposed construction and operation of a replacement nuclear research reactor at the Lucas Heights Science and Technology Centre

    International Nuclear Information System (INIS)

    1998-01-01

    These guidelines are based on the requirements of paragraphs 4.1 and 4.3 of the Administrative Procedures under the Commonwealth Environment Protection (Impact of Proposals) Act 1974 (EPIP Act).The Australian Nuclear Science and Technology Organisation (ANSTO) has been designated as proponent under the EPIP Act in relation to the proposed replacement nuclear research reactor at the Lucas Heights Science and Technology Centre (LHSTC). The term 'environment' refers to all aspects of the surroundings of human beings, whether affecting human beings as individuals or in social groupings. It includes the natural environment, the built environment, and social aspects of our surroundings. The definition covers such factors as air, water, soils, flora,fauna, buildings, roads, employment, hazards and risks, and safety. As set out in the guidelines, the scope of this assessment shall encompass those issues and alternatives directly related to the construction and operation of a replacement nuclear research reactor at the LHSTC. The EIS will need to make clear the site selection criteria used, and the basis, in assessing Lucas Heights as being suitable for a new reactor. While the EIS will address all aspects of the construction and operation of a replacement nuclear research reactor, it will not address issues associated with the treatment of spent nuclear fuel rods from the existing High Flux Australian Reactor (HIFAR facility). The EIS will also address issues associated with the eventual decommissioning of the proposed replacement reactor, and eventual decommissioning of the existing HIFAR facility

  7. LA CONTABILIDAD Y LA PARTIDA DOBLE: REPERCUSIÓN EUROPEA DE LA OBRA MAESTRA DE LUCA PACIOLI (SIGLOS XVI-XVIII

    Directory of Open Access Journals (Sweden)

    Miguel Gonçalves

    2011-08-01

    Full Text Available El artículo asume como finalidad la de analizar como se procesó la divulgación del método de la partida doble, con especial relevo para la literatura contabilística que en mucho ayudó a su difusión. De entre los diversos autores que contribuyeron para su generalización y difusión, se destaca Luca di Bartholomeu dei Pacioli. Por consiguiente, el artículo también tiene como objetivo presentar una reseña de los principales aspectos de la vida y de la obra de este tratadista de la Contabilidad, considerado por muchos el precursor de nuestra disciplina, por haber publicado en 1494 en Venecia la Summa de Arithmetica, Geometria, Proportioni et Proportionalita, obra primordial en el dominio de nuestra especialidad, más concretamente una sección suya – el Tratatus Particularis de Computis y Scripturis (De las Cuentas y las Escrituras. Palabras-clave: Historia de la Contabilidad. Partida Doble. Registros Contabilísticos. Luca Pacioli. De Computis et Scripturis.

  8. Therapeutic drug monitoring of tacrolimus in pancreas transplantation at São Lucas Hospital Monitoramento terapêutico de tacrolimus em transplante de pâncreas no Hospital São Lucas

    Directory of Open Access Journals (Sweden)

    Luciana Mello de Oliveira

    2007-10-01

    Full Text Available Tacrolimus (FK 506, a potent immunosuppressive drug used in prevention and treatment of rejection of transplanted organs, exhibits efficacy related to its blood levels and has a narrow therapeutic index. These factors require frequent monitoring of patients blood levels, in attempt to adjust the dose to reach the best drug concentration with minimum side effects. In this historic study, the authors evaluated tacrolimus blood profile in patients submitted to pancreas transplantation between June 2002 and March 2004. The results show that blood levels were, mostly, within subtherapeutic (39.1% and toxic (43.4% ranges. Considering post-transplantation period, subtherapeutic levels were more frequent until three months after the graft receiving (51.1% and between three and six months (41.9%, whereas toxic levels were more common six months after the transplantation (63%. Patients who received pancreas/kidney transplantation showed a tendency to present toxic levels. The same did not happen with the patients who received isolated pancreas and pancreas after kidney; these patients presented subtherapeutic blood levels in all post-transplantation periods. The results found in this study reassure the importance of therapeutic monitoring to achieve the adequate blood levels of tacrolimus following pancreas transplantation.O tacrolimus (FK506, um potente imunossupressor utilizado na profilaxia e no tratamento de rejeições pós-transplante, exibe eficácia relacionada com sua concentração sangüínea e possui estreita janela terapêutica. Esses fatores requerem o freqüente monitoramento dos níveis sangüíneos em pacientes que fazem uso do fármaco, tendo como objetivo o ajuste de dose para uma concentração terapêutica ótima com efeitos colaterais mínimos. Este estudo retrospectivo foi realizado através do acesso à base de dados do Laboratório de Patologia Clínica do Hospital São Lucas, da Pontifícia Universidade Católica do Rio Grande do

  9. Efficient Cryosolid Positron Moderators

    Science.gov (United States)

    2012-08-01

    table layout Figure 21 shows the integration of the IR spectroscopy optics with the positron Moderation and Annihilation vacuum chambers on the...Characterization of Cryogenic Moderators The application of Matrix Isolation Spectroscopy (MIS) to characterizing cryogenic solid positron ...Matrix Isolation Spectroscopy capability into our Positron Moderation apparatus, which enables spectroscopic characterization of the cryogenic

  10. Estructura de tallas y edad del marlin rayado Tetrapturus audax (Pisces:Xiphidae,en Cabo San Lucas,Baja California Sur,México

    Directory of Open Access Journals (Sweden)

    Felipe Neri Melo Barrera

    2004-12-01

    Full Text Available De 1988 a 1993 se muestrearon 1030 ejemplares de marlin rayado (Tetrapturus audax capturados por la flota deportiva de Cabo San Lucas.Se recolectaron 389 espinas dorsales para la estimación de la edad.La relación Longitud mandibular-Radio total de la espina es similar para hembras y machos.Se encontró que la cuarta espina dorsal refleja adecuadamente el crecimiento.La periodicidad de formación de las marcas de crecimiento es anual y parece que se relaciona con la temperatura superficial promedio del mar.Se contaron las bandas opaco-hialinas en cada corte de las espinas,y se encontraron diez grupos de edad (del dos al once,siendo el grupo siete el más abundante, seguido por los grupos seis y ocho.Las tallas observadas para el marlin rayado fueron de 160-280 cm de longitud mandibular,el 90%de los organismos estuvieron entre 190 y 225 cm.Los ejemplares pequeños se incorporan a la pesquería de junio hasta diciembre.Size and age structure of the striped marlin Tetrapturus audax (Pisces:Xiphidae,at Cabo San Lucas,Baja California Sur,México .The striped marlin (Tetrapturus audaxis found in temperate and tropical waters of the Pacific and Indian Ocean.It is particularly abundant in the southern tip of the Baja California peninsula.Specimens brought to Cabo San Lucas port (22 °53 ’ N y 109 °54 ’ Wby the sport fishery fleet that operates withing a radius of 54 km from 1988 to 1993 were sexes,measured and weighed.A total 1030 individuals were sampled.Dorsal fin spines (389were collected for age estimation.The spines were sectioned and hyaline-opaque bands counted.The relation of length to spine radius was similar for males and females.The fourth dorsal spine reflected the growth of the fish.The rhythm of growth mark formation is yearly and related to the sea surface temperature.Ten age groups were found and the seventh group was the most abundant,followed by groups "6 "and "8 ".The age structure of the striped marlin was stable in the study

  11. Perfil das infecções do trato urinário em idosos hospitalizados na Unidade de Geriatria do Hospital São Lucas da PUCRS = Urinary tract infections profile of the hospitalized elderly in a Geriatric Ward

    Directory of Open Access Journals (Sweden)

    Dallacorte, Roberta Rigo

    2007-01-01

    Conclusões: Escherichia coli foi o germe mais associado a infecções do trato urinário nos idosos hospitalizados na Unidade de Geriatria do Hospital São Lucas da PUCRS. Nessa população, a taxa de resistência bacteriana a fluorquinolonas foi elevada

  12. Grooved cold moderator tests

    International Nuclear Information System (INIS)

    Inoue, K.; Kiyanagi, Y.; Iwasa, H.; Watanabe, N.; Ikeda, S.; Carpenter, J.M.; Ishikawa, Y.

    1983-01-01

    We performed some grooved cold moderator experiments for methane at 20 K by using the Hokkaido University linac to obtain information to be used in the planning of the KENS-I' project. Cold neutron gains, spatial distribution of emitted beams and time distribution of the neutrons in the grooved cold moderator were measured. Furthermore, we assessed the effects of the grooved cold moderator on the performances of the spectrometers presently installed at the KENS-I cold source. We concluded that the grooved cold moderator benefited appreciably the performances of the spectrometers

  13. Evolución y planeación urbana en la ciudad turística de Cabo San Lucas, Baja California Sur (México

    Directory of Open Access Journals (Sweden)

    Jesús Bojórquez Luque

    2014-01-01

    Full Text Available El crecimiento de las ciudades debe de estar guiado por políticas públicas cuyo objetivo central sea la de configurar el espacio urbano que sea propicio para el desarrollo pleno de sus habitantes. Uno de los instrumentos fundamentales es la creación de instituciones locales para proyectar el crecimiento de la ciudad, así como los espacios de vida común para sus habitantes, donde tengan lugares de convivencia generando un tejido social sano y vigoroso. Este trabajo tiene como propósito analizar el modelo de estructura urbana para la ciudad de Cabo San Lucas que propone el Plan de Desarrollo Urbano a partir del modelo polinuclear, fortaleciendo un centro y tres subcentros urbanos y proponiendo una serie de mejoras y extensión de las instalaciones urbanas actuales.

  14. Moderation for Professional Learning

    Science.gov (United States)

    Earle, Sarah

    2017-01-01

    Moderation is put forward as they key strategy for improving the reliability of teacher assessment. However, for many teachers the word "moderation" conjures up ideas of uncomfortable situations in which marking is being checked by others and there are prolonged arguments about tiny features of individual work. In this article, the…

  15. Methane pellet moderator development

    International Nuclear Information System (INIS)

    Foster, C.A.; Schechter, D.E.; Carpenter, J.M.

    2004-01-01

    A methane pellet moderator assembly consisting of a pelletizer, a helium cooled sub-cooling tunnel, a liquid helium cooled cryogenic pellet storage hopper and a 1.5L moderator cell has been constructed for the purpose demonstrating a system for use in high-power spallation sources. (orig.)

  16. Moderator for nuclear reactor

    International Nuclear Information System (INIS)

    Milgram, M.S.; Dunn, J.T.; Hart, R.S.

    1995-01-01

    This invention relates to a moderator for a nuclear reactor and more specifically, to a composite moderator. A moderator is designed to slow down, or thermalize, neutrons which are released during nuclear reactions in the reactor fuel. Pure or almost pure materials like light water, heavy water, beryllium or graphite are used singly as moderators at present. All these materials, are used widely. Graphite has a good mechanical strength at high temperatures encountered in the nuclear core and therefore is used as both the moderator and core structural material. It also exhibits a low neutron-capture cross section and high neutron scattering cross section. However, graphite is susceptible to attach by carbon dioxide and/or oxygen where applicable, and releases stress energy under certain circumstances, although under normal operating conditions these reactions can be controlled. (author). 1 tab

  17. High efficiency positron moderation

    International Nuclear Information System (INIS)

    Taqqu, D.

    1990-01-01

    A new positron moderation scheme is proposed. It makes use of electric and magnetic fields to confine the β + emitted by a radioactive source forcing them to slow down within a thin foil. A specific arrangement is described where an intermediary slowed-down beam of energy below 10 keV is produced. By directing it towards a standard moderator optimal conversion into slow positrons is achieved. This scheme is best applied to short lived β + emitters for which a 25% moderation efficiency can be reached. Within the state of the art technology a slow positron source intensity exceeding 2 x 10 10 e + /sec is achievable. (orig.)

  18. Interviewing the moderator

    DEFF Research Database (Denmark)

    Traulsen, Janine Morgall; Almarsdóttir, Anna Birna; Björnsdóttir, Ingunn

    2004-01-01

    There has been an upsurge of academic interest in using focus groups (FGs) as a main or stand-alone qualitative method. In this article, the authors introduce a recently developed ancillary method to FGs called interviewing the moderator. The method is employed immediately after an FG and consists...... of a one-on-one interview with the FG moderator by another member of the research team. The authors argue, with reference to a specific study, that interviewing the moderator adds a new and valuable dimension to group interviews used in research. They describe how this method came about and provide...

  19. Segmented fuel and moderator rod

    International Nuclear Information System (INIS)

    Doshi, P.K.

    1987-01-01

    This patent describes a continuous segmented fuel and moderator rod for use with a water cooled and moderated nuclear fuel assembly. The rod comprises: a lower fuel region containing a column of nuclear fuel; a moderator region, disposed axially above the fuel region. The moderator region has means for admitting and passing the water moderator therethrough for moderating an upper portion of the nuclear fuel assembly. The moderator region is separated from the fuel region by a water tight separator

  20. Fuel enrichment reduction for heavy water moderated research reactors

    International Nuclear Information System (INIS)

    McCulloch, D.B.

    1984-01-01

    Twelve heavy-water-moderated research reactors of significant power level (5 MW to 125 MW) currently operate in a number of countries, and use highly enriched uranium (HEU) fuel. Most of these reactors could in principle be converted to use uranium of lower enrichment, subject in some cases to the successful development and demonstration of new fuel materials and/or fuel element designs. It is, however, generally accepted as desirable that existing fuel element geometry be retained unaltered to minimise the capital costs and licensing difficulties associated with enrichment conversion. The high flux Australian reactor, HIFAR, at Lucas Heights, Sydney is one of 5 Dido-class reactors in the above group. It operates at 10 MW using 80% 235 U HEU fuel. Theoretical studies of neutronic, thermohydraulic and operational aspects of converting HIFAR to use fuels of reduced enrichment have been made over a period. It is concluded that with no change of fuel element geometry and no penalty in the present HEU fuel cycle burn-up performance, conversion to MEU (nominally 45% 235 U) would be feasible within the limits of current fully qualified U-Al fuel materials technology. There would be no significant, adverse effects on safety-related parameters (e.g. reactivity coefficients) and only small penalties in reactor flux. Conversion to LEU (nominally 20% 235 U) a similar basis would require that fuel materials of about 2.3 g U cm -3 be fully qualified, and would depress the in-core thermal neutron flux by about 15 per cent relative to HEU fuelling. In qualitative terms, similar conclusions would be expected to hold for a majority of the above heavy water moderated reactors. (author)

  1. A new research reactor? Report by the Select Committee for an inquiry into the contract for a new reactor at Lucas Heights

    International Nuclear Information System (INIS)

    2001-05-01

    On 15 August 2000, the Senate resolved to establish the Select Committee for an Inquiry into the Contract for a New Reactor at Lucas Heights and report to the Parliament. The Select committee majority report is divided into three parts: the need for a new reactor; the tendering process and the nature of the contract; and Australia's nuclear waste management strategy and public health and safety. There is a final chapter which brings together the major issues examined in the report. Based on the evidence presented to it, the Committee notes that some Australian scientists and engineers present a strong case for the new reactor. While the Committee is of the view that nuclear science and technology is not backward looking and does offer opportunities for researchers to keep at the forefront of important areas in scientific research and development it does not automatically follow that the best way to promote scientific and medical research in this country is by spending substantial amounts of public funds for the next forty years on a single research reactor. Nevertheless, the Committee recommends that before the Government proceeds any further with the proposed reactor, it undertake a thorough and comprehensive public review of funding for medical and scientific research in Australia with a view to assessing priorities including the role, if any, a research reactor would have in contributing to Australia's scientific, medical and industrial interests. The Committee also requested that the Australian National Audit Office consider examining the tender and contract documents for the new reactor at Lucas Heights with a view to determining: whether further investigation of the tendering process and the contract is warranted; whether, during the tendering process, ANSTO ensured that there was adequate and appropriate independent verification and validation of the tenderers claims. Two supplementary report are included: one from the Liberal and National members (minority

  2. Cold moderators at ORNL

    International Nuclear Information System (INIS)

    Lucas, A. T.

    1997-09-01

    The Advanced Neutron Source (ANS) cold moderators were not an 'Oak Ridge first', but would have been the largest both physically and in terms of cold neutron flux. Two cold moderators were planned each 410 mm in diameter and containing about 30L of liquid deuterium. They were to be completely independent of each other. A modular system design was used to provide greater reliability and serviceability. When the ANS was terminated, upgrading of the resident High Flux Isotope Reactor (HFIR) was examined and an initial study was made into the feasibility of adding a cold source. Because the ANS design was modular, it was possible to use many identical design features. Sub-cooled liquid at 4 bar abs was initially chosen for the HFIR design concept, but this was subsequently changed to 15 bar abs to operate above the critical pressure. As in the ANS, the hydrogen will operate at a constant pressure throughout the temperature range and a completely closed loop with secondary containment was adopted. The heat load of 2 kW made the heat flux comparable with that of the ANS. Subsequent studies into the construction of cryogenic moderators for the proposed new Synchrotron Neutron source indicated that again many of the same design concepts could be used. By connecting the two cold sources together in series, the total heat load of 2 kW is very close to that of the HFIR allowing a very similar supercritical hydrogen system to be configured. The two hydrogen moderators of the SNS provide a comparable heat load to the HFIR moderator. It is subsequently planned to connect the two in series and operate from a single cold loop system, once again using supercritical hydrogen. The spallation source also provided an opportunity to re-examine a cold pellet solid methane moderator operating at 20K.

  3. Coupled moderator neutronics

    International Nuclear Information System (INIS)

    Russell, G.J.; Pitcher, E.J.; Ferguson, P.D.

    1995-01-01

    Optimizing the neutronic performance of a coupled-moderator system for a Long-Pulse Spallation Source is a new and challenging area for the spallation target-system designer. For optimal performance of a neutron source, it is essential to have good communication with instrument scientists to obtain proper design criteria and continued interaction with mechanical, thermal-hydraulic, and materials engineers to attain a practical design. A good comprehension of the basics of coupled-moderator neutronics will aid in the proper design of a target system for a Long-Pulse Spallation Source

  4. Moderator Chemistry Program

    International Nuclear Information System (INIS)

    Dewitt, L.V.; Gibbs, A.; Lambert, D.P.; Bohrer, S.R.; Fanning, R.L.; Houston, M.W.; Stinson, S.L.; Deible, R.W.; Abdel-Khalik, S.I.

    1990-11-01

    Over the past fifteen months, the Systems Chemistry Group of the Reactor Engineering Department has undertaken a comprehensive study of the Department's moderator chemistry program at Savannah River Site (SRS). An internal review was developed to formalize and document this program. Objectives were as outlined in a mission statement and action plan. In addition to the mission statement and action plan, nine separate task reports have been issued during the course of this study. Each of these task reports is included in this document as a chapter. This document is an organized compilation of the individual reports issued by the Systems Chemistry Group in assessment of SRS moderator chemistry to determine if there were significant gaps in the program as ft existed in October, 1989. While these reviews found no significant gaps in that mode of operation, or any items that adversely affected safety, items were identified that could be improved. Many of the items have already been dear with or are in the process of completion under this Moderator Chemistry Program and other Reactor Restart programs. A complete list of the items of improvement found under this assessment is found in Chapter 9, along with a proposed time table for correcting remaining items that can be improved for the chemistry program of SRS reactors. An additional external review of the moderator chemistry processes, recommendations, and responses to/from the Reactor Corrosion Mitigation Committee is included as Appendix to this compilation

  5. Den moderate revolution

    DEFF Research Database (Denmark)

    Larsen, Bøje

    "normale" industrivirksomheder, men den er absolut set begrænset. Årsagerne til denne kun "moderate revolution" af organisationsformerne diskuteres: Er det fordi klassisk organisation og social nærkontakt er nødvendig i den nye økonomi, eller er det manglende fantasi og tryghedsbehov? Begge muligheder...

  6. Cryogenic moderator design

    International Nuclear Information System (INIS)

    Diplock, B.R.

    1983-01-01

    This paper describes the present design of the two cold moderators to be built for the Spallation Neutron Source. It discusses the reasons behind a number of the design features and highlights several problem areas requiring solutions before a final design can be constructed

  7. In Everything Moderation

    Centers for Disease Control (CDC) Podcasts

    For many people, drinking alcohol is a regular part of social occasions, but moderation is important. Excessive alcohol consumption can lead to serious health and social problems. A recent report found that binge drinking is common among women and girls. In this podcast, Dr. Dafna Kanny discusses the dangers of binge drinking.

  8. Condicionamientos internos en la variación de los pronombres personales átonos en Los hechos de Don Miguel Lucas de Iranzo

    Directory of Open Access Journals (Sweden)

    Francisco Díaz Montesinos

    2004-06-01

    Full Text Available The aim of this paper is to analyse the linguistic factors constraining the use of personal clitics lo(s, la(s, le(s in XVth Century Middle-Age Castilian, as revealed in the Relación de los Hechos de Don Miguel Lucas de Iranzo (1458. A multivariate analysis of data from this text shows that internal (morphological, syntactic, lexical and textual factors interact and allows us to imagine the simplest and original context where leísmo could start. A nearly categorical tendency to employ le for male referents as direct objects is developed with human antecedents and where Latin used dative case or alternated between dative and accusative case. If Latin used accusative case, occurrence of le (leísmo depends on a set of linguistic constraints whose effect is systematic and predictable, as shows a logistic regression analysis carried out in this paper. Use of le (leísmo for human antecedents is constrained by the following internal factors: etymology, the number and the clitic's position within the sentence, type of syntactic structure and the verb's tense.

  9. The late-medieval Royal chancery of the Kingdom of Sicily and the inquisitio of Giovan Luca Barberi (14th-16th century

    Directory of Open Access Journals (Sweden)

    Alessandro Silvestri

    2016-09-01

    Full Text Available At the beginning of the sixteenth century, Giovan Luca Barberi, Magister notarius of the Sicilian Royal chancery, led an intense and long-lasting inquisitio on the royal patrimony of the island and on the possessions of local lords on behalf of King Ferdinand II of Aragon. This well-known inquiry arouse the interest of a number of scholars, who have especially stressed the aspects connected to its importance in the history of law, as well as its political consequences. However, by analysing Barberi’s work (a system of books known as capibrevi through an administrative perspective, it can now be understood as the result of an “archival enterprise” and, at the same time, strictly connected to the role of Magister notarius that Barberi had in the Sicilian chancery. On the one hand, this study describes the fourteenth- and fifteenth-century dynamics that influenced the functioning of the Regia cancelleria and the tasks of its personnel, as well as to define the methods for producing, recording and preserving documentation. On the other hand, this study promotes a new explanation of Barberi’s inquisitio, illustrating in detail how the Magister notarius worked in royal archives and how carried out his inquiry, in other words, how he retrieved, used and organised information for compiling the capibrevi.

  10. An epidemiological study of cancer incidence and mortality among nuclear industry workers at Lucas Heights Science and Technology centre in collaboration with IARC

    International Nuclear Information System (INIS)

    Habib, R.R.; Kaldor, J.

    1999-01-01

    An epidemiological study is being undertaken at Lucas Heights Science and Technology Centre (LHSTC) where the only nuclear reactor in Australia has been in operation since 1958. The study is part of an international collaborative study coordinated by the International Agency for Research on Cancer (IARC), and has dual objectives, first to assess whether workers at LHSTC have had different levels of mortality or cancer incidence from the New South Wales and the Australian populations, and second, as part of the IARC study, to estimate as precisely as possible, through collaboration with IARC, the risk of contracting cancer from low-level, long-term exposure to ionising radiation. The research project is a retrospective cohort study based on records of employment and exposure to radiation kept at LHSTC since 1957. Electronic linkage of all the available dosimetry and employment information with national registers of cancer incidence and mortality is being undertaken for the cohort of LHSTC workers, to allow for a passive follow-up of more than 7000 workers employed from 1957 onwards

  11. A Novel 1D Hybrid Chaotic Map-Based Image Compression and Encryption Using Compressed Sensing and Fibonacci-Lucas Transform

    Directory of Open Access Journals (Sweden)

    Tongfeng Zhang

    2016-01-01

    Full Text Available A one-dimensional (1D hybrid chaotic system is constructed by three different 1D chaotic maps in parallel-then-cascade fashion. The proposed chaotic map has larger key space and exhibits better uniform distribution property in some parametric range compared with existing 1D chaotic map. Meanwhile, with the combination of compressive sensing (CS and Fibonacci-Lucas transform (FLT, a novel image compression and encryption scheme is proposed with the advantages of the 1D hybrid chaotic map. The whole encryption procedure includes compression by compressed sensing (CS, scrambling with FLT, and diffusion after linear scaling. Bernoulli measurement matrix in CS is generated by the proposed 1D hybrid chaotic map due to its excellent uniform distribution. To enhance the security and complexity, transform kernel of FLT varies in each permutation round according to the generated chaotic sequences. Further, the key streams used in the diffusion process depend on the chaotic map as well as plain image, which could resist chosen plaintext attack (CPA. Experimental results and security analyses demonstrate the validity of our scheme in terms of high security and robustness against noise attack and cropping attack.

  12. Isolation By Distance (IBD) signals in the deep-water rose shrimp Parapenaeus longirostris (Lucas, 1846) (Decapoda, Panaeidae) in the Mediterranean Sea.

    Science.gov (United States)

    Lo Brutto, S; Maggio, T; Arculeo, M

    2013-09-01

    The identification of boundaries of genetic demes is one of the major goals for fishery management, and few Mediterranean commercial species have not been studied from a genetic point of view yet. The deep-water rose shrimp Parapenaeus longirostris (Lucas, 1846) is one of the most important components of commercial landings in Mediterranean, its fishery aspects have received much attention, regrettably without any concern for the genetic architecture of its populations. The population structure in the central and eastern Mediterranean Sea (captures from six Italian and two Greek landings) has been analysed on the basis of surveys carried out with mitochondrial and AFLP markers. Data revealed the presence of a gradual discrepancy along a west-east axis. This species, occurring mainly at a depth of between 100 and 400 m, is not strongly confined in isolated demes, but it demonstrates an 'Isolation By Distance' model, within the Mediterranean Sea, which includes geographical areas with a some degree of isolation. The role of hydrodynamic forces, such as currents, water fronts, is discussed; and a further evidence of the 'Levantine isolation' within Mediterranean basin is shown. Copyright © 2013 Elsevier Ltd. All rights reserved.

  13. Report of the Committee of inquiry into a fire which occurred on 18 March 1987 in a radioisotope processing cell, Building 54 at the Lucas Heights Research Laboratories

    International Nuclear Information System (INIS)

    1987-01-01

    At about 1745 hours on Wednesday, 18 March 1987 a fire occurred in a small charcoal filter inside a processing cell (hot cell) in Building 54 at the Lucas Heights Research Laboratories (LHRL). This cell was being used to process irradiated uranium to separate the radioactive isotope molybdenum-99. Some radioactive contamination escaped from the hot cell into the operating area and three AAEC officers were found to have minor radioactive contamination on their skin/hair. The majority of the radioactive material released from the fire was trapped by the main filters outside the cell. The total amounts of radioactive noble gas and of radioiodine released to the environment during the week in which the fire occurred were within the normal range of discharge and were 53% and 2.1%, respectively, of the weekly limit authorised by the NSW Department of Health. On the evidence available to it, the Committee concludes that the fire was caused by spontaneous combustion in the charcoal filter used to trap radioactive gases released by the operations in the hot cell; the mechanism causing the fire cannot be clearly established at this stage; no member of AAEC staff, NSW emergency services personnel or the general public suffered, or will suffer, any adverse health effects from radioactivity as a result of the accident

  14. [Moderately haloalkaliphilic aerobic methylobacteria].

    Science.gov (United States)

    Trotsenko, Iu A; Doronina, N V; Li, Ts D; Reshetnikov, A S

    2007-01-01

    Aerobic methylobacteria utilizing oxidized and substituted methane derivatives as carbon and energy sources are widespread in nature and involved in the global carbon cycle, being a unique biofilter on the path of these C1 compounds from different ecosystems to the atmosphere. New data on the biological features of moderately halophilic, neutrophilic, and alkaliphilic methylobacteria isolated from biotopes with higher osmolarity (seas, saline and soda lakes, saline soils, and deteriorating marble) are reviewed. Particular attention is paid to the latest advances in the study of the mechanisms of osmoadaptation of aerobic moderately haloalkaliphilic methylobacteria: formation of osmolytes, in particular, molecular and genetic aspects of biosynthesis of the universal bioprotectant ectoine. The prospects for further studies of the physiological and biochemical principles of haloalkalophily and for the application of haloalkaliphilic aerobic methylobacteria in biosynthesis and biodegradation are discussed.

  15. Cold moderator scattering kernels

    International Nuclear Information System (INIS)

    MacFarlane, R.E.

    1989-01-01

    New thermal-scattering-law files in ENDF format have been developed for solid methane, liquid methane liquid ortho- and para-hydrogen, and liquid ortho- and para-deuterium using up-to-date models that include such effects as incoherent elastic scattering in the solid, diffusion and hindered vibration and rotations in the liquids, and spin correlations for the hydrogen and deuterium. These files were generated with the new LEAPR module of the NJOY Nuclear Data Processing System. Other modules of this system were used to produce cross sections for these moderators in the correct format for the continuous-energy Monte Carlo code (MCNP) being used for cold-moderator-design calculations at the Los Alamos Neutron Scattering Center (LANSCE). 20 refs., 14 figs

  16. Triphenylmethane, a possible moderator material

    International Nuclear Information System (INIS)

    Hügle, Th.; Mocko, M.; Hartl, M.A.; Daemen, L.L.; Muhrer, G.

    2014-01-01

    New challenges in neutron scattering result in an increased demand in novel moderator concepts. The most direct way to address the problem would be to change the moderator material itself. However the range of available neutron moderator materials is small. In this paper, we discuss triphenylmethane, a possible moderator material especially promising for cold neutron moderator applications. Our investigations include a parallel experimental and theoretical approach ranging from cross-section measurements and inelastic neutron spectroscopy to molecular modeling. -- Highlights: • Triphenylmethane as a potential moderator material is discussed. • Parallel theoretical and experimental approach. • Possibly very useful for cold neutrons

  17. Moderation of neutron energy

    International Nuclear Information System (INIS)

    Marlatt, G.R.

    1986-01-01

    This patent describes a nuclear reactor system having a nuclear reactor which has a core including fuel assemblies, means for transmitting through the core a coolant, the coolant having a predetermined neutron-energy moderating property, sealed tubes in the core, each tube containing a material having a different neutron-energy moderating property than the coolant, means, when actuated, to engage at least certain of the tubes, for opening certain of the tubes to permit the coolant to replace the material in the tubes thereby to change the energy spectrum of the neutrons in the reactor, hydraulic means, connected to the opening means, for actuating the opening means to engage certain of the tubes to open the tubes. A device, external to the reactor, connected to the hydraulic means controlls the actuation of the opening means, the opening means being so set with reference to the tubes that only certain of the tubes are opened at any time as the opening means is advanced towards the tubes by the hydraulic means

  18. How do people define moderation?

    Science.gov (United States)

    vanDellen, Michelle R; Isherwood, Jennifer C; Delose, Julie E

    2016-06-01

    Eating in moderation is considered to be sound and practical advice for weight maintenance or prevention of weight gain. However, the concept of moderation is ambiguous, and the effect of moderation messages on consumption has yet to be empirically examined. The present manuscript examines how people define moderate consumption. We expected that people would define moderate consumption in ways that justified their current or desired consumption rather than view moderation as an objective standard. In Studies 1 and 2, moderate consumption was perceived to involve greater quantities of an unhealthy food (chocolate chip cookies, gummy candies) than perceptions of how much one should consume. In Study 3, participants generally perceived themselves to eat in moderation and defined moderate consumption as greater than their personal consumption. Furthermore, definitions of moderate consumption were related to personal consumption behaviors. Results suggest that the endorsement of moderation messages allows for a wide range of interpretations of moderate consumption. Thus, we conclude that moderation messages are unlikely to be effective messages for helping people maintain or lose weight. Copyright © 2016 Elsevier Ltd. All rights reserved.

  19. Moderator Configuration Options for ESS

    DEFF Research Database (Denmark)

    Zanini, L.; Batkov, K.; Klinkby, Esben Bryndt

    2016-01-01

    The current, still evolving status of the design and the optimization work for the moderator configuration for the European Spallation Source is described. The moderator design has been strongly driven by the low-dimensional moderator concept recently proposed for use in spallation neutron sources...... or reactors. Quasi-two dimensional, disc- or tube-shaped moderators,can provide strong brightness increase (factor of 3 or more) with respect to volume para-H2moderators, which constitute the reference, state-of-the-art technology for high-intensity coupled moderators. In the design process other, more...... conventional, principles were also considered,such as the importance of moderator positioning, of the premoderator, and beam extraction considerations. Different design and configuration options are evaluated and compared with the reference volume moderator configuration described in the ESS Technical Design...

  20. Spallation neutron source moderator design

    International Nuclear Information System (INIS)

    Charlton, L.A.; Barnes, J.M.; Gabriel, T.A.; Johnson, J.O.

    1998-01-01

    This paper describes various aspects of the spallation neutron source (SNS) moderator design. Included are the effects of varying the moderator location, interaction effects between moderators, and the impact on neutron output when various reflector materials are used. Also included is a study of the neutron output from composite moderators, where it is found that a combination of liquid H 2 O and liquid H 2 can produce a spectrum very similar to liquid methane (L-CH 4 ). (orig.)

  1. SNS moderator design

    International Nuclear Information System (INIS)

    Charlton, L.A.; Barnes, J.M.; Gabriel, T.A.; Johnson, J.O.

    1997-01-01

    The pulsed-neutron source SNS facility will start operation at 1 MW. A later upgrade to 5 MW is planned. The facility consists of a linear accelerator, an accumulator ring, and a target station. The protons from the accumulator ring will be injected into the target station at 1 GeV. The subsequent spallation process will then produce low-energy thermal neutrons that may be used for a wide variety of experiments. In this paper the authors discuss neutronic calculations which address various aspects of the moderate design. The computer codes HETC and MCNP were used for these calculations with the former code performing the high-energy transport. Neutrons which fell in energy to 20 MeV or less were then passed to MCNP for further transport

  2. FLUID MODERATED REACTOR

    Science.gov (United States)

    Wigner, E.P.; Ohlinger, L.A.; Young, G.J.; Weinberg, A.M.

    1957-10-22

    A reactor which utilizes fissionable fuel elements in rod form immersed in a moderator or heavy water and a means of circulating the heavy water so that it may also function as a coolant to remove the heat generated by the fission of the fuel are described. In this design, the clad fuel elements are held in vertical tubes immersed in heavy water in a tank. The water is circulated in a closed system by entering near the tops of the tubes, passing downward through the tubes over the fuel elements and out into the tank, where it is drawn off at the bottom, passed through heat exchangers to give up its heat and then returned to the tops of the tubes for recirculation.

  3. La inmigración de jubilados estadounidenses en México y sus prácticas transnacionales: Estudio de caso en Mazatlán, Sinaloa y Cabo San Lucas, Baja California Sur

    OpenAIRE

    Lizárraga Morales, Omár

    2008-01-01

    En este artículo se analiza la migración de jubilados estadounidenses hacia México, particularmente en dos localidades en el noroeste del país: Mazatlán, Sinaloa y Cabo San Lucas en Baja California Sur. Este es un flujo migratorio que se dirige en dirección contraria a la que tradicionalmente se estudia en la migración internacional, y tiene un rápido crecimiento en algunos destinos mexicanos, pues está compuesto por los integrantes de la generación del baby boom. Se describen las estructuras...

  4. A centralidade da Palavra de Deus em Lucas 5,1-11 (The centrality of the Word od God in Luke 5,1-11 - DOI: 10.5752/P.2175-5841.2013v11n30p682

    Directory of Open Access Journals (Sweden)

    Ildo Perondi

    2013-06-01

    Full Text Available Pouca atenção foi dada pelos estudiosos para a função da Palavra de Deus no relato da pesca milagrosa em Lucas, tanto em nível literário, quanto teológico. Diante disso, o objetivo deste trabalho foi analisar a perícope de Lc 5,1-11, com enfoque na Palavra de Deus, proclamada em Jesus e por ele. A metodologia utilizada foi a análise e interpretação de textos, privilegiando o método histórico-crítico e os seus elementos essenciais, além do uso de outros métodos, baseados na ciência da linguagem. Pode-se dizer que a Palavra de Deus ocupa um lugar central na trama, dando cadência ao relato e elucidando o sentido teológico que Lucas pretende imprimir, o que fica evidente pelas alterações feitas pelo autor no relato original. Na perícope da pesca milagrosa, a Palavra é proclamada por Jesus em caráter performativo, faz o milagre acontecer, conduz Pedro à conversão e dá a ele uma nova missão. Na teologia de Lucas ouvimos o eco das comunidades primitivas, nascidas ao redor da Palavra do Senhor. Palavras-chave: Lucas. Pesca. Milagre. Pedro. Palavra.   Abstract The scholars haven’t given too much attention to the function of the Word of God in the report of the miraculous catch of fish in Luke, at the literary and theological level. Thus, the objective of this paper was to analyze the pericope of Luke 5:1-11, with emphasis on the Word of God proclaimed in Jesus and through Him. The methodology used was the analysis and interpretation of texts, focusing on the historical-critical method and its essential elements, besides the use of other methods, based on the science of language. It’s possible to say that the Word of God occupies a central place in the plot, giving cadence to the report and elucidating the theological sense that Luke wanted to print, which is evidenced by the changes he has made in the original report. In the pericope of the miraculous catch of fish, the Word is proclaimed by Jesus in a performative way

  5. Levantamento e Análise do Potencial Agroindustrial dos Municípios Mato-Grossenses de Sinop, Sorriso E Lucas do Rio Verde

    Directory of Open Access Journals (Sweden)

    Elizangela Beckmann

    2011-06-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE O estudo destaca que o desenvolvimento dos municípios mato-grossenses de Sinop, Sorriso e Lucas do Rio Verde, ao ter sua atuação econômica focada no agronegócio e este ter forte participação do segmento agrícola, encontra na região diversos fatores favoráveis a agroindustrialização, com destaque para: o baixo consumo local da produção agrícola; o potencial mercado consumidor de produtos agroalimentares; a elevada capacidade de armazenagem; as melhorias em adoção dos sistemas de transporte; e outros indicadores socioeconômicos positivos. Em que o desenvolvimento da região passa pela dotação de melhores condições estruturais (investimentos em capitais físico e humano e institucionais (instituições de apoio e suporte a empresários e trabalhadores, que ampliem as condições competitivas sistêmicas da região, além de dotá-la também de melhor “organização industrial” visando melhor eficiência produtiva e competitividade. Sendo que as melhorias das condições estruturais e institucionais devem ter à frente o setor público e organizações de classe e das condições de organização industrial, como é de se esperar, o setor privado. Em seu conjunto estes elementos criarão a base sob as quais a vantagem competitiva agroindustrial da região será criada e se sustentará: a dotação de excelência e especialização produtiva agroindustrial gerando efeitos de transbordamentos técnicos e ganhos de aglomerações, de escala e de escopo.

  6. Thermal neutron moderating device

    International Nuclear Information System (INIS)

    Takigami, Hiroyuki.

    1995-01-01

    In a thermal neutron moderating device, superconductive coils for generating magnetic fields capable of applying magnetic fields vertical to the longitudinal direction of a thermal neutron passing tube, and superconductive coils for magnetic field gradient for causing magnetic field gradient in the longitudinal direction of the thermal neutron passing tube are disposed being stacked at the outside of the thermal neutron passing tube. When magnetic field gradient is present vertically to the direction of a magnetic moment, thermal neutrons undergo forces in the direction of the magnetic field gradient in proportion to the magnetic moment. Then, the magnetic moment of the thermal neutrons is aligned with the direction vertical to the passing direction of the thermal neutrons, to cause the magnetic field gradient in the passing direction of the thermal neutrons. The speed of the thermal neutrons can be optionally selected and the wavelength can freely be changed by applying forces to the thermal neutrons and changing the extent and direction of the magnetic field gradient. Superconductive coils are used as the coils for generating magnetic fields and the magnetic field gradient in order to change extremely high energy of the thermal neutrons. (N.H.)

  7. Toward a Moderate Autoethnography

    Directory of Open Access Journals (Sweden)

    Sarah Stahlke Wall

    2016-10-01

    Full Text Available Autoethnography is an avant-garde method of qualitative inquiry that has captured the attention of an ever-increasing number of scholars from a variety of disciplines. Personal experience methods can offer a new and unique vantage point from which to make a contribution to social science yet, autoethnography has been criticized for being self-indulgent, narcissistic, introspective, and individualized. Methodological discussions about this method are polarized. As an autoethnographer and qualitative methodologist with an interest in personal experience methods, I have had the opportunity to review several autoethnographic manuscripts over the years. As my reviews accumulated, I began to see themes in my responses and it became apparent that I was advocating for an approach to autoethnography that lies in contrast to the frequently offered methodological polemics from philosophically divergent scholars. In this article, I draw from the reviews I have done to address topics such as applications and purposes for autoethnography, the degree of theory and analysis used within the method, data sources and dissemination of findings, and ethical issues. I then connect the concerns I see in the reviewed manuscripts to examples in the autoethnographic literature. Ultimately, I propose a moderate and balanced treatment of autoethnography that allows for innovation, imagination, and the representation of a range of voices in qualitative inquiry while also sustaining confidence in the quality, rigor, and usefulness of academic research.

  8. Radiopharmaceutical production at Lucas Heights

    International Nuclear Information System (INIS)

    Druce, M.

    1987-01-01

    The difficult problems of operating and maintaining complex equipment, meeting despatch deadlines, ensuring product quality, production scheduling and controlling staff are discussed in relation to Australia's national radioisotope production plant

  9. Building on success / Edward Lucas

    Index Scriptorium Estoniae

    Lucas, Edward

    2007-01-01

    Eesti edust 1990ndatel aastatel. Kuid 2007. a. parlamendivalimised näitasid, et Eestis nagu teistes endistes kommunistlikes maades puudub reformialdis valitsus. Kiitust pälvib Eesti president Toomas Hendrik Ilves, kes pani veto pronkssõduri seadusele ja taunis Eesti iseseisvuspäeva pidustustel peetud kõnes korruptsiooni, enesega rahulolu ja takerdunud reforme. Vt. ka Marek Laane tõlge eesti keelde: Eesti vajab terasemat valitsust. Postimees 8. märts 2007, lk. 16

  10. Moderate Secularism and Multicultural Equality

    DEFF Research Database (Denmark)

    Lægaard, Sune

    2008-01-01

    Tariq Modood argues that European states are only ‘moderately secular' and that this kind of secularism is compatible with public accommodation of religious groups and provides a model of Muslim integration appropriate for European states. Although attention to the fact of moderate secularism...... provides a response to a prominent argument against multicultural accommodation of religious minorities, what is really at stake in discussions of multiculturalism and secularism are political principles. Modood's case for accommodation of Muslims along the lines of moderate secularism presupposes...

  11. Doing statistical mediation and moderation

    CERN Document Server

    Jose, Paul E

    2013-01-01

    Written in a friendly, conversational style, this book offers a hands-on approach to statistical mediation and moderation for both beginning researchers and those familiar with modeling. Starting with a gentle review of regression-based analysis, Paul Jose covers basic mediation and moderation techniques before moving on to advanced topics in multilevel modeling, structural equation modeling, and hybrid combinations, such as moderated mediation. User-friendly features include numerous graphs and carefully worked-through examples; ""Helpful Suggestions"" about procedures and pitfalls; ""Knowled

  12. Neutron moderation theory with thermal motion of the moderator nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Rusov, V.D.; Tarasov, V.A.; Chernezhenko, S.A.; Kakaev, A.A.; Smolyar, V.P. [Odessa National Polytechnic University, Department of Theoretical and Experimental Nuclear Physics, Odessa (Ukraine)

    2017-09-15

    In this paper we present the analytical expression for the neutron scattering law for an isotropic source of neutrons, obtained within the framework of the gas model with the temperature of the moderating medium as a parameter. The obtained scattering law is based on the solution of the general kinematic problem of elastic scattering of neutrons on nuclei in the L-system. Both the neutron and the nucleus possess arbitrary velocities in the L-system. For the new scattering law we obtain the flux densities and neutron moderation spectra as functions of temperature for the reactor fissile medium. The expressions for the moderating neutrons spectra allow reinterpreting the physical nature of the underlying processes in the thermal region. (orig.)

  13. Acute emesis: moderately emetogenic chemotherapy

    DEFF Research Database (Denmark)

    Herrstedt, Jørn; Rapoport, Bernardo; Warr, David

    2011-01-01

    This paper is a review of the recommendations for the prophylaxis of acute emesis induced by moderately emetogenic chemotherapy as concluded at the third Perugia Consensus Conference, which took place in June 2009. The review will focus on new studies appearing since the Second consensus conference...... receiving multiple cycles of moderately emetogenic chemotherapy will be reviewed. Consensus statements are given, including optimal dose and schedule of serotonin(3) receptor antagonists, dexamethasone, and neurokinin(1) receptor antagonists. The most significant recommendations (and changes since the 2004...... version of the guidelines) are as follows: the best prophylaxis in patients receiving moderately emetogenic chemotherapy (not including a combination of an anthracycline plus cyclophosphamide) is the combination of palonosetron and dexamethasone on the day of chemotherapy, followed by dexamethasone...

  14. Graphite moderated 252Cf source

    International Nuclear Information System (INIS)

    Sajo B, L.; Barros, H.; Greaves, E. D.; Vega C, H. R.

    2014-08-01

    The thorium molten salt reactor is an attractive and affordable nuclear power option for developing countries with insufficient infrastructure and limited technological capability. In the aim of personnel training and experience gathering at the Universidad Simon Bolivar there is in progress a project of developing a subcritical thorium liquid fuel reactor. The neutron source to run this subcritical reactor is a 252 Cf source and the reactor will use high-purity graphite as moderator. Using the MCNP5 code the neutron spectra of the 252 Cf in the center of the graphite moderator has been estimated along the channel where the liquid thorium salt will be inserted; also the ambient dose equivalent due to the source has been determined around the moderator. (Author)

  15. Radicals versus Moderates: A Critique of Gyekye's Moderate ...

    African Journals Online (AJOL)

    The communitarian conception of person is a widely accepted view in African thought. Kwame Gyekye thinks there is a distinction between what he calls radical communitarianism and his own version of moderate communitarianism. He is of the view that radical communitarianism is faced with insurmountable problems and ...

  16. Moderator circulation in CANDU reactors

    International Nuclear Information System (INIS)

    Fath, H.E.S.; Hussein, M.A.

    1989-01-01

    A two-dimensional computer code that is capable of predicting the moderator flow and temperature distribution inside CANDU calandria is presented. The code uses a new approach to simulate the calandria tube matrix by blocking the cells containing the tubes in the finite difference mesh. A jet momentum-dominant flow pattern is predicted in the nonisothermal case, and the effect of the buoyancy force, resulting from nuclear heating, is found to enhance the speed of circulation. Hot spots are located in low-velocity areas at the top of the calandria and below the inlet jet level between the fuel channels. A parametric study is carried out to investigate the effect of moderator inlet velocity,moderator inlet nozzle location, and geometric scaling. The results indicate that decreasing the moderator inlet velocity has no significant influence on the general features of the flow pattern (i.e., momentum dominant); however, too many high-temperature hot spots appear within the fuel channels

  17. Local Assessment Moderation in SEPUP.

    Science.gov (United States)

    Roberts, Lily; And Others

    Assessment moderation is a procedure in which scorers or raters meet to achieve a consensus on scores assigned to student work. In the Science Education for Public Understanding Program (SEPUP), local teams of teachers met regularly at six sites nationwide to score student work, review methods of assigning scores, discuss and resolve discrepancies…

  18. Nuclear data generation for cryogenic moderators and high temperature moderators

    International Nuclear Information System (INIS)

    Petriw, Sergio

    2007-01-01

    The commonly used processing codes for nuclear data only allow the generation of cross section data for a limited number of materials and physical conditions.At present, one of the most used computer codes for the generation of neutron cross sections is N J O Y, which is based on a phonon expansion of the scattering function starting from the frequency spectrum.Therefore, the information related to the system's density of states is crucial to produce the required data of interest. In this work the formalism of the Synthetic Model for Molecular Solids (S M M S) was implemented, which is in turn based on the Synthetic Frequency Spectrum (S F S) concept.The synthetic spectrum is central in the present work, and it is built from simple, relevant parameters of the moderator, thus conforming an alternative tool when no information on the actual frequency spectrum of the moderator material is available.S F S 's for several material of interest where produced in this work, for both cryogenic and high temperature moderators.We studied some materials of special interest, like solid methane, ice, methyl clathrate and two which are of special interest in the nuclear industry: graphite and beryllium.The libraries generated in the present work for the materials considered, in spite of their synthetic origin, are able to produce results that are even in better agreement with available information [es

  19. IPNS grooved, solid methane moderator

    International Nuclear Information System (INIS)

    Carpenter, J.M.; Schulke, A.W.; Scott, T.L.; Wozniak, D.G.; Benson, B.E.; Leyda, B.D.

    1985-01-01

    There are two motives for using cold moderators in pulsed neutron sources, to provide higher fluxes of long-wavelength neutrons, and to extend the epithermal range with its short pulse structure to lower energies. For both these purposes solid methane, operated at the lowest possible temperatures, is the best material we know of. Two problems accompany the use of solid methane in high power sources, namely heat transport in view of the low thermal conductivity of solid methane, and deterioration due to radiation damage. We have designed a system suitable to operate in IPNS, subject to nuclear heating of about 25 W, which incorporates an aluminum foam matrix to conduct the heat from within the moderator. We report the results of the first few months' operation and of a few tests that we have performed

  20. Playing Moderately Hard to Get

    OpenAIRE

    Stephen Reysen; Iva Katzarska-Miller

    2013-01-01

    In two studies, we examined the effect of different degrees of attraction reciprocation on ratings of attraction toward a potential romantic partner. Undergraduate college student participants imagined a potential romantic partner who reciprocated a low (reciprocating attraction one day a week), moderate (reciprocating attraction three days a week), high (reciprocating attraction five days a week), or unspecified degree of attraction (no mention of reciprocation). Participants then rated thei...

  1. Cryogenic moderator simulations: confronting reality

    International Nuclear Information System (INIS)

    Iverson, E. B.

    1999-01-01

    The Intense Pulsed Neutron Source (IPNS) at Argonne National Laboratory is a spallation neutron source dedicated to materials research. Its three cryogenic methane moderators provide twelve neutron beams to fourteen instruments and test facilities. This report concerns ongoing activities for benchmarking our Monte Carlo model of the IPNS neutron generation system. This paper concentrates on the techniques (both experimental and calculational) used in such benchmarking activities

  2. Reflector-moderated critical assemblies

    International Nuclear Information System (INIS)

    Paxton, H.C.; Jarvis, G.A.; Byers, C.C.

    1975-07-01

    Experiments with reflector-moderated critical assemblies were part of the Rover Program at the Los Alamos Scientific Laboratory (LASL). These assemblies were characterized by thick D 2 O or beryllium reflectors surrounding large cavities that contained highly enriched uranium at low average densities. Because interest in this type of system has been revived by LASL Plasma Cavity Assembly studies, more detailed descriptions of the early assemblies than had been available in the unclassified literature are provided. (U.S.)

  3. Moderate Psoriasis: A Proposed Definition.

    Science.gov (United States)

    Llamas-Velasco, M; de la Cueva, P; Notario, J; Martínez-Pilar, L; Martorell, A; Moreno-Ramírez, D

    2017-12-01

    The Psoriasis Area Severity Index (PASI) is the most widely used scale for assessing the severity of psoriasis and for therapeutic decision making. On the basis of the PASI score, patients have been stratified into 2 groups: mild disease and moderate-to-severe disease. To draft a proposal for the definition and characterization of moderate psoriasis based on PASI and Dermatology Life Quality Index (DLQI) scores. A group of 6 dermatologists with experience in the treatment of psoriasis undertook a critical review of the literature and a discussion of cases to draft a proposal. In order of priority, PASI, DLQI, and body surface area (BSA) are the parameters to be used in daily practice to classify psoriasis as mild, moderate, or severe. Severity should be assessed on the basis of a combined evaluation and interpretation of the PASI and DLQI. And 3, PASI and DLQI should carry equal weight in the determination of disease severity. On this basis, psoriasis severity was defined using the following criteria: mild, PASI15, independently of the DLQI score. A more precise classification of psoriasis according to disease severity will improve the risk-benefit assessment essential to therapeutic decision making in these patients. Copyright © 2017 AEDV. Publicado por Elsevier España, S.L.U. All rights reserved.

  4. Moderate and extreme maternal obesity.

    LENUS (Irish Health Repository)

    Abdelmaboud, M O

    2012-05-01

    The aim of this study was to investigate the prevalence of moderate and extreme obesity among an Irish obstetric population over a 10-year period, and to evaluate the obstetric features of such pregnancies. Of 31,869 women delivered during the years 2000-2009, there were 306 women in the study group, including 173 in the moderate or Class 2 obese category (BMI 35-39.9) and 133 in the extreme or Class 3 obese category (BMI > or = 40).The prevalence of obese women with BMI > or = 35 was 9.6 per 1000 (0.96%), with an upward trend observed from 2.1 per 1000 in the year 2000, to 11.8 per 1000 in the year 2009 (P = 0.001). There was an increase in emergency caesarean section (EMCS) risk for primigravida versus multigravid women, within both obese categories (P < 0.001). However, there was no significant difference in EMCS rates observed between Class 2 and Class 3 obese women, when matched for parity. The prevalence of moderate and extreme obesity reported in this population is high, and appears to be increasing. The increased rates of abdominal delivery, and the levels of associated morbidity observed, have serious implications for such women embarking on pregnancy.

  5. Perfil clínico-epidemiológico dos pacientes portadores de paracoccidioidomicose no Serviço de Estomatologia do Hospital São Lucas da Pontifícia Universidade Católica do Rio Grande do Sul Clinical-epidemiologic profile of paracoccidioidomycosis at the Stomatology Department of São Lucas Hospital, Pontificia Universidade Católica of Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Flaviana Dornela Verli

    2005-05-01

    Full Text Available No presente estudo, são descritas as características clínicas e epidemiológicas de 61 casos de paracoccidioidomicose, atendidos no Serviço de Estomatologia do Hospital São Lucas da PUCRS, no período de junho de 1976 a junho de 2004. O Rio Grande do Sul é considerado uma região endêmica da doença devido às condições eco-epidemiológicas para o desenvolvimento do fungo. Observou-se que a doença ocorreu em 58 (95% homens e 3 (5% mulheres, predominando a faixa etária de 40 a 59 anos (70,5%, e a profissão vinculada à agricultura em 27 (44,3% pacientes. O hábito de fumar foi prevalente em 52 (85,3% pacientes da amostra e muitos eram, também, etilistas. Todos os casos apresentavam manifestações estomatológicas, sendo que as lesões orais ocorreram predominantemente com aspecto ulcerado e moriforme, observadas em vários sítios anatômicos. As evidências radiográficas de lesões pulmonares estavam presentes em 32 (65,3% radiografias avaliadas.The aim of the article was to describe clinical and epidemiological features of 61 oral paracoccidioidomycosis cases from the Stomatology Department of São Lucas Hospital, analyzed from July 1976 to June 2004. The State of Rio Grande do Sul is an endemic region due to ecoepidemiologic conditions, that are favorable for the development of the yeast. Men are the most affected gender, with 58 (95% affected compared to 3 (5% women. Ii is most prevalent (70.5% between 40 and 59 years of age. Agricultural labor was the most common occupation with 27/61 (44.3% patients. Tobacco smoking was prevalent in 52 (85.3% of the sample, and alcoholism was a frequent finding. All the patients showed stomatologic manifestations, with ulcers and mulberry-like stomatitis the most prevalent, these oral lesions were also observed in many anatomical sites. Alterations were present in 32 (65.3% of the pulmonary radiographs.

  6. Stable carbon and nitrogen isotope values of dorsal spine age rings indicate temporal variation in the diet of striped marlin (Kajikia audax) in waters around Cabo San Lucas, Mexico.

    Science.gov (United States)

    Acosta-Pachón, Tatiana A; Ortega-García, Sofia; Graham, Brittany

    2015-09-30

    Billfishes, such as marlin, are top pelagic predators that play an important role in maintaining the stability of marine food webs. Notwithstanding the importance of these species, there remain gaps in our knowledge on their movements, foraging, and trophic status in the early stage of life. We measured the δ(13)C and δ(15)N values in each annual growth band deposited in the dorsal spine from striped marlin caught off Cabo San Lucas, Mexico, to produce retrospective isotopic profiles that would enable us to detect any significant isotopic changes across development. The samples were analyzed using an elemental analyzer coupled to an isotope ratio mass spectrometer. There was no relationship between the size of striped marlin and the δ(15) N values. Differences in δ(15)N mean values across different age classes were not significant and the variation in δ(15)N values through the marlins' life cycle was less than 2‰. However, the mean δ(15)N values between individuals varied by up to 6‰. The δ(13)C values increased as a function of age, and the mean δ(13)C values varied significantly between age classes. Fin spines can be used to construct retrospective isotopic histories for the investigation of trophic dynamics and migratory histories in billfishes, for which population dynamics are often poorly known. Copyright © 2015 John Wiley & Sons, Ltd.

  7. Learning and the Great Moderation

    OpenAIRE

    Bullard, James B.; Singh, Aarti

    2009-01-01

    We study a stylized theory of the volatility reduction in the U.S. after 1984 - the Great Moderation - which attributes part of the stabilization to less volatile shocks and another part to more difficult inference on the part of Bayesian households attempting to learn the latent state of the economy. We use a standard equilibrium business cycle model with technology following an unobserved regime-switching process. After 1984, according to Kim and Nelson (1999a), the variance of U.S. macroec...

  8. Cold moderator test facilities working group

    International Nuclear Information System (INIS)

    Bauer, Guenter S.; Lucas, A. T.

    1997-09-01

    The working group meeting was chaired by Bauer and Lucas.Testing is a vital part of any cold source development project. This applies to specific physics concept verification, benchmarking in conjunction with computer modeling and engineering testing to confirm the functional viability of a proposed system. Irradiation testing of materials will always be needed to continuously extend a comprehensive and reliable information database. An ever increasing worldwide effort to enhance the performance of reactor and accelerator based neutron sources, coupled with the complexity and rising cost of building new generation facilities, gives a new dimension to cold source development and testing programs. A stronger focus is now being placed on the fine-tuning of cold source design to maximize its effectiveness in fully exploiting the facility. In this context, pulsed spallation neutron sources pose an extra challenge due to requirements regarding pulse width and shape which result from a large variety of different instrument concepts. The working group reviewed these requirements in terms of their consequences on the needs for testing equipment and compiled a list of existing and proposed facilities suitable to carry out the necessary development work.

  9. Playing Moderately Hard to Get

    Directory of Open Access Journals (Sweden)

    Stephen Reysen

    2013-12-01

    Full Text Available In two studies, we examined the effect of different degrees of attraction reciprocation on ratings of attraction toward a potential romantic partner. Undergraduate college student participants imagined a potential romantic partner who reciprocated a low (reciprocating attraction one day a week, moderate (reciprocating attraction three days a week, high (reciprocating attraction five days a week, or unspecified degree of attraction (no mention of reciprocation. Participants then rated their degree of attraction toward the potential partner. The results of Study 1 provided only partial support for Brehm’s emotion intensity theory. However, after revising the high reciprocation condition vignette in Study 2, supporting Brehm’s emotion intensity theory, results show that a potential partners’ display of reciprocation of attraction acted as a deterrent to participants’ intensity of experienced attraction to the potential partner. The results support the notion that playing moderately hard to get elicits more intense feelings of attraction from potential suitors than playing too easy or too hard to get. Discussion of previous research examining playing hard to get is also re-examined through an emotion intensity theory theoretical lens.

  10. LIGHT WATER MODERATED NEUTRONIC REACTOR

    Science.gov (United States)

    Christy, R.F.; Weinberg, A.M.

    1957-09-17

    A uranium fuel reactor designed to utilize light water as a moderator is described. The reactor core is in a tank at the bottom of a substantially cylindrical cross-section pit, the core being supported by an apertured grid member and comprised of hexagonal tubes each containing a pluralily of fuel rods held in a geometrical arrangement between end caps of the tubes. The end caps are apertured to permit passage of the coolant water through the tubes and the fuel elements are aluminum clad to prevent corrosion. The tubes are hexagonally arranged in the center of the tank providing an amulus between the core and tank wall which is filled with water to serve as a reflector. In use, the entire pit and tank are filled with water in which is circulated during operation by coming in at the bottom of the tank, passing upwardly through the grid member and fuel tubes and carried off near the top of the pit, thereby picking up the heat generated by the fuel elements during the fission thereof. With this particular design the light water coolant can also be used as the moderator when the uranium is enriched by fissionable isotope to an abundance of U/sup 235/ between 0.78% and 2%.

  11. Demand Moderation in Military Communication Networks

    National Research Council Canada - National Science Library

    Blackmore, Perry

    2002-01-01

    .... Demand moderation is the term used to encompass the array of mechanisms aimed at achieving this end. Integrated Defence networks of the future should benefit enormously from demand moderation mechanisms.

  12. HUD Low and Moderate Income Areas

    Data.gov (United States)

    Department of Housing and Urban Development — This dataset and map service provides information on the U.S. Housing and Urban Development's (HUD) low to moderate income areas. The term Low to Moderate Income,...

  13. Low to moderate temperature nanolaminate heater

    Science.gov (United States)

    Eckels, J Del [Livermore, CA; Nunes, Peter J [Danville, CA; Simpson, Randall L [Livermore, CA; Hau-Riege, Stefan [Fremont, CA; Walton, Chris [Oakland, CA; Carter, J Chance [Livermore, CA; Reynolds, John G [San Ramon, CA

    2011-01-11

    A low to moderate temperature heat source comprising a high temperature energy source modified to output low to moderate temperatures wherein the high temperature energy source modified to output low to moderate temperatures is positioned between two thin pieces to form a close contact sheath. In one embodiment the high temperature energy source modified to output low to moderate temperatures is a nanolaminate multilayer foil of reactive materials that produces a heating level of less than 200.degree. C.

  14. Cold moderators for pulsed neutron sources

    International Nuclear Information System (INIS)

    Carpenter, J.M.

    1990-01-01

    This paper reviews cold moderators in pulsed neutron sources and provides details of the performance of different cold moderator materials and configurations. Analytical forms are presented which describe wavelength spectra and emission time distributions. Several types of cooling arrangements used in pulsed source moderators are described. Choices of materials are surveyed. The author examines some of the radiation damage effects in cold moderators, including the phenomenon of ''burping'' in irradiated cold solid methane. 9 refs., 15 figs., 4 tabs

  15. Some concluding remarks about cold moderator development

    International Nuclear Information System (INIS)

    Carpenter, J.M.

    1990-01-01

    This paper is the transcription of remarks made at the conclusion of the Workshop on Cold Neutron Sources held at the Los Angeles National Laboratory, Los Alamos, New Mexico, March 5--7, 1990. Areas of interest include the following: scattering functions; cold moderator materials; radiation mixing of chemical composition; comparison of some pulsed moderator spectra; hydrogen mixtures; premoderators and shields; composite reflectors; exotic moderator materials; deuterated methanes; mixed moderator materials; and test facility availabilities. 2 refs., 4 figs., 1 tab

  16. Molten fuel-moderator interaction

    International Nuclear Information System (INIS)

    Lee, J.H.S.; Kynstautas, R.

    1987-02-01

    A critical review of the current understanding of vapor explosions was carried out. It was concluded that, on the basis of actual industrial accidents and large scale experiments, energetic high yield steam explosion cannot be regarded as an improbable event if large quantities of molten fuel and coolant are mixed together. This study also reviewed a hydrodynamic transient model proposed by Henry and Fauske Associates to assess a molten fuel-moderator interaction event. It was found that the proposed model negates a priori the possibility of a violent event, by introducing two assumptions: 1) fine fragmentation of the molten fuel, and ii) rapid heat transfer from the fine fragments to form steam. Using the Hicks and Menzies thermodynamic model, maximum work potential and pressure rise in the calandria were estimated. However, it is recommended that a more representative upper bound model based on an underwater explosion of a pressurized volume of steam be developed

  17. MODERATOR ELEMENTS FOR UNIFORM POWER NUCLEAR REACTOR

    Science.gov (United States)

    Balent, R.

    1963-03-12

    This patent describes a method of obtaining a flatter flux and more uniform power generation across the core of a nuclear reactor. The method comprises using moderator elements having differing moderating strength. The elements have an increasing amount of the better moderating material as a function of radial and/or axial distance from the reactor core center. (AEC)

  18. Upgrades to the ISIS moderator configuration

    International Nuclear Information System (INIS)

    Taylor, A.D.

    1989-01-01

    The current ISIS moderator configuration, was designed in 1980 to provide a flexible set of beams for a hypothetical instrument suite. The use of fluid moderators at three different temperatures offering six faces to the instruments, has proved to be effective. In this paper we discuss an upgrade of these moderators in the light of the current and projected instrument configuration. (author)

  19. Thermal hydraulic simulation of moderator heat exchanger

    International Nuclear Information System (INIS)

    Anil Lal, S.; Rajakumar, A.; Vaidyanathan, G.; Srinivasan, R.; Chetal, S.C.

    1993-01-01

    Pressurized heavy water reactors form the majority in the first stage of India's nuclear power programme. Heavy water is both moderator and primary coolant. The heat generated in the moderator due to neutron moderation and capture has to be removed in moderator heat exchangers. It has been desired to improve the performance characteristics of moderator heat exchangers, whereby moderator would enter the calandria vessel at a low temperature and would enable higher power of operation for the same limiting temperature of moderator in the calandria. Results of studies carried out using a three dimensional computer code for various operating options are given. Using these velocities the heat exchangers have been analysed for flow induced vibrations. 7 refs., 6 figs., 6 tabs

  20. Composite hydrogen-solid methane moderators

    International Nuclear Information System (INIS)

    Picton, D.; Bennington, S.; Ansell, S.; Fernandez-Garcia, J.; Broome, T.

    2004-01-01

    This paper describes the results of Monte-Carlo calculations for a coupled moderator on a low-power pulsed neutron spallation source and is part of the design study for a second target station for the ISIS spallation source. Various options were compared including hydrogen, solid methane, grooving the solid methane and compound moderators made of hydrogen in front of solid methane. To maximise the neutron current at low energies two strategies appear to emerge from the calculations. For instruments that view a large area of moderator surface a layer of hydrogen in front of a thin solid-methane moderator is optimum, giving a gain of about a factor 10 relative to the current liquid hydrogen moderator on the existing ISIS tantalum target. For instruments that only view a restricted area higher flux, corresponding to a gain of 13.5, can be achieved with the use of a single groove or re-entrant hole in the moderator. (orig.)

  1. Study of tungsten based positron moderators

    Energy Technology Data Exchange (ETDEWEB)

    Lucio, O.G. de; Pérez, M.; Mendoza, U.; Morales, J.G.; Cruz, J.C. [Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000 México DF (Mexico); DuBois, R.D. [Missouri University of Science and Technology, Rolla, MO 65409 (United States)

    2015-07-01

    Positrons and how they interact with matter has a growing interest in many fields. Most of their uses require the production of slow positron beams with a well-defined energy, but since these particles are usually generated by means of a radioactive source, they are fast and with a broad distribution of energies. For this reason it is necessary to moderate them to lower energies via inelastic collisions. Then, they can be accelerated to the desired energies. This requires the use of a moderator. Tungsten is one of the most commonly used moderator materials because of its reasonable efficiency and relatively low cost. In this work we present different methods of producing transmission tungsten-based moderators, with particular interest in a combination of tungsten thin foils and grids. We also show results about the characterization of these moderators by ion beam analysis and microscopy techniques along with their relative moderation efficiencies.

  2. Why should we bother with assessment moderation?

    Science.gov (United States)

    Smith, Colleen

    2012-08-01

    Assessment moderation is a significant component of a quality education system. How this practice is conceptualised, applied to the assessment process and embedded in teaching and learning, influence the quality of nurse education programmes. This paper challenges the traditional view that moderation is confined to what happens at the time of assessment which is evident in the use of language such as pre-moderation and post-moderation practice. It critiques traditional moderation practices such as double marking, applying assessment criteria and standards and assigning marks and grades and argues that these practices don't do justice to the complexity of assessment. It calls for a whole of course approach to moderation based on a set of principles which encompass constructive alignment, a community of practice group, the subjective nature of assessment and a reflective quality improvement cycle. Copyright © 2011 Elsevier Ltd. All rights reserved.

  3. Study of tungsten based positron moderators

    International Nuclear Information System (INIS)

    Lucio, O.G. de; Pérez, M.; Mendoza, U.; Morales, J.G.; Cruz, J.C.; DuBois, R.D.

    2015-01-01

    Positrons and how they interact with matter has a growing interest in many fields. Most of their uses require the production of slow positron beams with a well-defined energy, but since these particles are usually generated by means of a radioactive source, they are fast and with a broad distribution of energies. For this reason it is necessary to moderate them to lower energies via inelastic collisions. Then, they can be accelerated to the desired energies. This requires the use of a moderator. Tungsten is one of the most commonly used moderator materials because of its reasonable efficiency and relatively low cost. In this work we present different methods of producing transmission tungsten-based moderators, with particular interest in a combination of tungsten thin foils and grids. We also show results about the characterization of these moderators by ion beam analysis and microscopy techniques along with their relative moderation efficiencies

  4. Research reactor utilization. Summary reports of three study group meetings: Irradiation techniques at research reactors, held in Istanbul 15-19 November 1965; Research reactor operation and maintenance problems, held in Caracas 6-10 December 1965; and Research reactor utilization in the Far East, held in Lucas Heights 28 February - 4 March 1966

    International Nuclear Information System (INIS)

    1967-01-01

    The three sections of this book, which are summary reports of three Study Group meetings of the IAEA: Irradiation techniques at research reactors, Istanbul, 15-19 November 1965; Research reactor operation and maintenance problems, Caracas, 6-10 December 1965; and Research reactor utilization in the Far East, Lucas Heights, Australia, 28 February - 4 March 1966. These meetings were the latest in a series designed to promote efficient utilization of research reactors, to disseminate information on advances in techniques, to discuss common problems in reactor operations, and to outline some advanced areas of reactor-based research. (author)

  5. Moderate Secularism, Difference Sensitivity and Contextualism

    DEFF Research Database (Denmark)

    Lægaard, Sune

    2009-01-01

    The article is a rejoinder to Tariq Modood's reply (Politics, Vol. 29, No. 1, 2009) to my article 'Moderate Secularism and Multicultural Equality' (Politics, Vol 28, No. 3, 2008).......The article is a rejoinder to Tariq Modood's reply (Politics, Vol. 29, No. 1, 2009) to my article 'Moderate Secularism and Multicultural Equality' (Politics, Vol 28, No. 3, 2008)....

  6. Identifying Discourses of Moderation in Higher Education

    Science.gov (United States)

    Adie, Lenore; Lloyd, Margaret; Beutel, Denise

    2013-01-01

    Moderation of student assessment is a critical component of teaching and learning in contemporary universities. Yet, despite this, it tends to be marked by idiosyncratic and sporadic processes informed by liminal understanding. This paper, in the light of forthcoming radical national requirements for the declaration of moderation processes in…

  7. Integrating Mediators and Moderators in Research Design

    Science.gov (United States)

    MacKinnon, David P.

    2011-01-01

    The purpose of this article is to describe mediating variables and moderating variables and provide reasons for integrating them in outcome studies. Separate sections describe examples of moderating and mediating variables and the simplest statistical model for investigating each variable. The strengths and limitations of incorporating mediating…

  8. Understanding and Using Mediators and Moderators

    Science.gov (United States)

    Wu, Amery D.; Zumbo, Bruno D.

    2008-01-01

    Mediation and moderation are two theories for refining and understanding a causal relationship. Empirical investigation of mediators and moderators requires an integrated research design rather than the data analyses driven approach often seen in the literature. This paper described the conceptual foundation, research design, data analysis, as…

  9. Development of cold source moderator structure

    International Nuclear Information System (INIS)

    Aso, Tomokaze; Ishikura, Syuichi; Terada, Atsuhiko; Teshigawara, Makoto; Watanabe, Noboru; HIno, Ryutaro

    1999-01-01

    The cold and thermal neutrons generated at the target (which works as a spallation neutron source under a 5MW proton beam condition) is filtered with cold source moderators using supercritical hydrogen. Preliminary structural analysis was carried out to clarify technical problems on the concept of the thin-walled structure for the cold source moderator. Structural analytical results showed that the maximum stress of 1 12MPa occurred on the moderator surface, which exceeded the allowable design stresses of ordinary aluminum alloys. Flow patterns measured by water flow experiments agreed well with hydraulic analytical results, which showed that an impinging jet flow from an inner pipe of the moderator caused a recirculation flow on a large scale. Based on analytical and experimental results, new moderator structures with minute frames, blowing flow holes etc. were proposed to keep its strength and to suppress the recirculation flow. (author)

  10. Neutron moderators for the European Spallation Source

    DEFF Research Database (Denmark)

    Klinkby, Esben Bryndt; Zanini, L.; Batkov, K.

    The design of the neutron moderators for the European Spallation Source, intended to be installed at the start of operations of the facility in 2019 has now been finalized and the moderators are being fabricated. Among the driving principles in the design have been flexibility for instruments...... to have access to cold and thermal neutrons with highest possible source brightness. Different design and configuration options were evaluated. The final configuration accepted for construction foresees two moderators with identical para-hydrogen (so-called "butterfly") shape, but different heights......, placed above and below the spallation target. Both moderators are able to serve the full 2 x 120° beam extraction sectors of instrument suite. The top, 3-cm tall moderator, has both high thermal and high cold brightness, more than by a factor of 2.5 compared to the previous design of the Technical Design...

  11. Unperturbed moderator brightness in pulsed neutron sources

    International Nuclear Information System (INIS)

    Batkov, K.; Takibayev, A.; Zanini, L.; Mezei, F.

    2013-01-01

    The unperturbed neutron brightness of a moderator can be defined from the number of neutrons leaving the surface of a moderator completely surrounded by a reflector. Without openings for beam extraction, it is the maximum brightness that can be theoretically achieved in a moderator. The unperturbed brightness of a cylindrical cold moderator filled with pure para-H 2 was calculated using MCNPX; the moderator dimensions were optimised, for a fixed target and reflector geometry corresponding to the present concept for the ESS spallation source. This quantity does not depend on openings for beam extraction and therefore can be used for a first-round optimisation of a moderator, before effects due to beam openings are considered. We find that such an optimisation yields to a factor of 2 increase with respect to a conventional volume moderator, large enough to accommodate a viewed surface of 12×12 cm 2 : the unperturbed neutron brightness is maximum for a disc-shaped moderator of 15 cm diameter, 1.4 cm height. The reasons for this increase can be related to the properties of the scattering cross-section of para-H 2 , to the added reflector around the exit surface in the case of a compact moderator, and to a directionality effect. This large optimisation gain in the unperturbed brightness hints towards similar potentials for the perturbed neutron brightness, in particular in conjunction with advancing the optical quality of neutron delivery from the moderator to the sample, where by Liouville theorem the brightness is conserved over the beam trajectory, except for absorption and similar type losses

  12. 1405-IJBCS-Article-Dr Kengni Lucas

    African Journals Online (AJOL)

    KODJIO NORBERT

    météoriques, les eaux de ruissellement des toitures et voiries sans oublier les eaux de ruissellement des chaussées (Colandini, 1997 ;. Durand, 2003). Par conséquent, une pollution d'origine industrielle ne peut être incriminée. Les sols camerounais renferment en moyenne. 28,76 µg/l de plomb (Tchamegni, 1997).

  13. Repdigits in k-Lucas sequences

    Indian Academy of Sciences (India)

    Since the function x ↦→ x/ log x is increasing for all x>e, it is easy to check that the inequality x log x. < A implies x < 2A log A, whenever A ≥ 3. Thus, taking A := 1.2 × 1013 k4 log2 k, inequality (14) yields n − 1 < 2 (1.2 × 1013k4 log2 k) log(1.2 × 1013 k4 log2 k). < (2.4 × 1013k4 log2 k)(31 + 4 log k + 2 log log k).

  14. On a Divisibility Relation for Lucas Sequences

    Science.gov (United States)

    2016-01-08

    and d = gcd(m,n). 2. In Z[x] we have the equality of ideals (xm − 1, xn − 1) = ( xd − 1). 3. Let γ be an algebraic integer in some number field K...show that xd − 1 ∈ (xm − 1, xn − 1). In the case d = 1 this reduces to showing that 1 ∈ ( xm − 1 x− 1 , xn − 1 x− 1 ) . (9) The resultant of the...9) in the case d = 1. The case of arbitrary d reduces to the case d = 1. Indeed, by the latter, xd − 1 belongs to the ideal (xm − 1, xn − 1) in the

  15. Talle sai saatuslikuks kannatamatus / Edward Lucas

    Index Scriptorium Estoniae

    Lucas, Edward, 1962-

    2010-01-01

    Kuigi Venemaa peaminister Vladimir Putin tunnistas, et Katõni massimõrv oli NKVD kätetöö, lisas ta sellele ka oma revisionistliku märgi. Autor leiab, et Poola president Lech Kaczyński ei tahtnud, et Poola delegatsioon hilineks Katõni ohvrite mälestustseremooniale ja see viis presidendilennuki piloodi riskantse maandumiseni, mille käigus said surma Poola president ja kõik teised lennukis viibinud

  16. Fibonacci and Lucas numbers with applications

    CERN Document Server

    Koshy, Thomas

    2011-01-01

    [Koshy's] book is without doubt the most comprehensive and scholarly work on Fibonacci numbers to date and I am sure that it will quickly signal its presence and impose itself as an authoritative reference manual on Fibonacci numbers. -Napoleon Gauthier, Royal Military College of Canada, Kingston, ON What a gem this is! [...] My only regrest about the book is that it wasn't around years ago. It fills such a void. -Monte Zerger, Adams State College, Alamosa, CO

  17. 2058-IJBCS-Article-Lucas Adang K

    African Journals Online (AJOL)

    hp

    Inspection by age and sex revealed that adults had a prevalence of 52 (37.4%), young adults 27 (20.1), and calves 4 (8.5%), while males had a prevalence of 66. (29.1%) and females 17 ... animals range freely grazing grasses in the fields.

  18. Peer Moderation of Asynchronous Online Discussions: An Exploratory Study of Peer E-Moderating Behaviour

    Science.gov (United States)

    Ghadirian, Hajar; Ayub, Ahmad Fauzi Mohd

    2017-01-01

    This study explored patterns of e-moderating behaviour students performed when they were assigned as peer moderators of asynchronous online discussions in a reciprocal manner. Eighty-four students from an undergraduate blended course were observed during a 7-week-long online discussions. Using quantitative content analysis peer moderators'…

  19. Methods for Integrating Moderation and Mediation: A General Analytical Framework Using Moderated Path Analysis

    Science.gov (United States)

    Edwards, Jeffrey R.; Lambert, Lisa Schurer

    2007-01-01

    Studies that combine moderation and mediation are prevalent in basic and applied psychology research. Typically, these studies are framed in terms of moderated mediation or mediated moderation, both of which involve similar analytical approaches. Unfortunately, these approaches have important shortcomings that conceal the nature of the moderated…

  20. Mediators and moderators in early intervention research.

    Science.gov (United States)

    Breitborde, Nicholas J K; Srihari, Vinod H; Pollard, Jessica M; Addington, Donald N; Woods, Scott W

    2010-05-01

    The goal of this paper is to provide clarification with regard to the nature of mediator and moderator variables and the statistical methods used to test for the existence of these variables. Particular attention will be devoted to discussing the ways in which the identification of mediator and moderator variables may help to advance the field of early intervention in psychiatry. We completed a literature review of the methodological strategies used to test for mediator and moderator variables. Although several tests for mediator variables are currently available, recent evaluations suggest that tests which directly evaluate the indirect effect are superior. With regard to moderator variables, two approaches ('pick-a-point' and regions of significance) are available, and we provide guidelines with regard to how researchers can determine which approach may be most appropriate to use for their specific study. Finally, we discuss how to evaluate the clinical importance of mediator and moderator relationships as well as the methodology to calculate statistical power for tests of mediation and moderation. Further exploration of mediator and moderator variables may provide valuable information with regard to interventions provided early in the course of a psychiatric illness.

  1. Overview moderator material for nuclear reactor components

    International Nuclear Information System (INIS)

    Mairing Manutu Pongtuluran; Hendra Prihatnadi

    2009-01-01

    In order for a reactor design is considered acceptable absolute technical requirement is fulfilled because the most important part of a reactor design. Safety considerations emphasis on the handling of radioactive substances emitted during the operation of a reactor and radioactive waste handling. Moderator material is a layer that interacts directly with neutrons split the nuclear fuel that will lead to changes in physical properties, nuclear properties, mechanical properties and chemical properties. Reviews moderator of this time is of the types of moderator is often used to meet the requirements as nuclear material. (author)

  2. Reflector optimization for coupled liquid hydrogen moderator

    International Nuclear Information System (INIS)

    Kiyanagi, Y.; Iwasa, H.; Watanabe, N.; Furusaka, M.

    1991-01-01

    As a part of optimization studies on a coupled liquid hydrogen moderator system, the optimal thickness of the reflector, the effects of neutron absorbing liners and other beam hole/moderator on the cold-neutron-beam intensity were studied experimentally. It turns out that the optimal thickness is rather thick in this system and the existence of Cd liners around the beam extraction hole considerably reduces the cold neutron beam intensity, while the existence of other beam hole and moderator does not give an important intensity reduction. (author)

  3. NORMATIVE MODERATORS OF IMPULSE BUYING BEHAVIOR

    Directory of Open Access Journals (Sweden)

    Danes Jaya Negara

    2003-01-01

    Full Text Available Prior research has presented the moderating role of normative evaluations in the relationship between the impulsive buying trait and consumers’ buying behaviors. In this article the authors show that consumer tendency to buy something spontaneous, unreflectively and immediately can be perceived as a factor which describes buying impulsiveness. This article also shows conceptual and empirical evidence that there is some support for the moderating role of normative evaluations in the relationship between buying impulsiveness and impulse buying behaviors. Significance occurs when consumers believe that act on impulse is suitable. The result suggests that consumers’ normative evaluation can moderate the link between the trait and behavioral aspects of impulse buying.

  4. Solid-methane moderator systems at KENS

    International Nuclear Information System (INIS)

    Furusaka, M.

    1997-09-01

    An overview of the target-moderator-reflector assembly (TMRA) systems at the Neutron Science Laboratory (KENS) at the High Energy Accelerator Research Organization (KEK) is described together with the historical changes. Because of the optimized design of TMRA, the neutron-generation efficiency is very high. The characteristics of the cold moderator system, such as the absolute intensity, spectrum and radiation damage to it, are also described. There are a number of new neutron-scattering instruments which are being viewed at the moderator. A brief description of the proposed TMRA for our future project is also given. (auth)

  5. Nutritional Recovery Outcome among Moderately Malnourished ...

    African Journals Online (AJOL)

    Nutritional Recovery Outcome among Moderately Malnourished Under-five Children in Communities Implementing Positive Deviance - Hearth or Community Health Workers' Nutrition Promotion Approaches in Karusi and Kirundo Provinces, Burundi.

  6. Solar and Interplanetary Disturbances causing Moderate ...

    Indian Academy of Sciences (India)

    magnetospheric conditions leading to 121 moderate geomagnetic storms. (MGS) have been ... increases on sudden storm commencement (SSC) day than its previous day value and acquires .... Tokyo, Japan. Webb, D. F. 1995, Rev. Geophys.

  7. Moderator heat recovery of CANDU reactors

    International Nuclear Information System (INIS)

    Fath, H.E.S.; Ahmed, S.T.

    1986-01-01

    A moderator heat recovery scheme is proposed for CANDU reactors. The proposed circuit utilizes all the moderator heat to the first stages of the plant feedwater heating system. CANDU-600 reactors are considered with moderator heat load varying from 120 to 160 MWsub(th), and moderator outlet temperature (from calandria) varying from 80 to 100 0 C. The steam saved from the turbine extraction system was found to produce an additional electric power ranging from 5 to 11 MW. This additional power represents a 0.7-1.7% increase in the plant electric output power and a 0.2-0.7% increase in the plant thermal efficiency. The outstanding features and advantages of the proposed scheme are presented. (author)

  8. TMD Evolution at Moderate Hard Scales

    Energy Technology Data Exchange (ETDEWEB)

    Rogers, Ted [Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States); Collins, John C. [Pennsylvania State Univ., University Park, PA (United States)

    2016-01-01

    We summarize some of our recent work on non-perturbative transverse momentum dependent (TMD) evolution, emphasizing aspects that are necessary for dealing with moderately low scale processes like semi-inclusive deep inelastic scattering.

  9. Childhood Maltreatment, Emotional Lability, and Alcohol Problems in Young Adults At-Risk for ADHD: Testing Moderation and Moderated Moderation.

    Science.gov (United States)

    Bunford, Nóra; Wymbs, Brian T; Dawson, Anne E; Shorey, Ryan C

    2017-01-01

    Childhood maltreatment and alcohol problems are common among young adults with attention-deficit hyperactivity disorder (ADHD). However, little is known about the degree to which maltreatment and alcohol problems are associated; potential pertinent mediating or moderating mechanisms, such as emotional lability; and whether this association varies by sex. We examined, in a sample of adults at risk for ADHD (N = 122, 37% male), the association between childhood maltreatment and alcohol problems, whether emotional lability mediated or moderated this association, and whether either role of emotional lability differed between men and women. Emotional lability moderated the association between emotional neglect and alcohol problems; maltreatment increased risk for alcohol problems for those scoring high tovery high on emotional lability, but not for those with very low-moderate levels. The association between emotional abuse and alcohol problems depended both on emotional lability and sex; emotional abuse decreased the risk for alcohol problems among men very low/low on emotional lability, but not for men who were moderate to very high on emotional lability, or for women. These findings have implications for the way in which targeting maltreatment and emotional lability may be incorporated into prevention and intervention programs to prevent alcohol problems among men and women at risk for ADHD.

  10. Moderator mixing after a pressure tube failure

    International Nuclear Information System (INIS)

    MacKinnon, J.C.; Fortman, R.A.; Hadaller, G.I.

    1997-01-01

    During a guaranteed shutdown state (GSS) in a CANDU reactor, there must be sufficient negative reactivity to ensure subcriticality in the event of a process failure. In one of the acceptable states, the reactor is kept subcritical by a high concentration of a neutron-absorbing chemical (the poison gadolinium nitrate) dissolved in the moderator (i.e., the moderator is guaranteed overpoisoned). A postulated accident scenario which is considered as a part of reactor safety analysis is the rupture of a fuel channel (i.e., a pressure tube/calandria tube break) when the reactor is in a GSS. If one of the channels in the core breaks (requiring a simultaneous failure of both the pressure tube and the surrounding calandria tube), coolant from the primary heat transport system will be discharged into the moderator, causing an associated displacement of fluid through relief ducts at the top of the calandria vessel. The incoming (unpoisoned) coolant may mix quickly with the moderator, or may mix slowly while displacing poisoned moderator through the relief ducts. The effectiveness of mixing generally depends on the break location, the coolant discharge rate and the moderator circulation. If an in-core loss of coolant accident occurred while the reactor is in this overpoisoned state, it must be guaranteed that even with the dilution of the poison by the incoming coolant the reactor will remain subcritical on both a local and global basis. This paper presents an overview of an experimental program in progress at the Moderator Test Facility at Stern Laboratories to investigate coolant/poison mixing for a simulated in-core fishmouth pressure tube/calandria tube rupture. The nominal system conditions investigated are of a reactor in a GSS, with coolant in the primary heat transport system at the same temperature as the heavily poisoned moderator, i.e., a depressurised 'cold' state. The results presented are those obtained during the commissioning of the modified Test Facility. The

  11. Premoderator optimization of decoupled hydrogen moderator

    International Nuclear Information System (INIS)

    Harada, Masahide; Teshigawara, Makoto; Kai, Tetsuya; Sakata, Hideaki; Watanabe, Noboru; Ikeda, Yujiro

    2001-03-01

    An optimization study on the premoderator, the reflector material choice and a length of the linear is carried out for the design of high performance decoupled hydrogen moderator. NMTC/JAM and MCNP-4C are used for the neutronics calculation. The result indicates that, assuming premoderator dimensions and decoupling energy is controlled, the decoupled hydrogen moderator with a premoderator can provide better pulse characteristics than that without the premoderator for a Be reflector. On the selection of the reflector material, it is clearly shown that Pb and Hg reflectors give merits in using the premoderator for higher intensity and reduction of energy deposition in moderator. It is also shown that a H 2 O premoderator provides a short tail while a D 2 O premoderator provides the high peak intensity. Minimum liner length is evaluated to be 20 cm from the viewpoint of neutronics. (author)

  12. Moderate alcohol consumption and chronic disease

    DEFF Research Database (Denmark)

    Mukamal, Kenneth J; Clowry, Catherine M; Murray, Margaret M

    2016-01-01

    Drinking within recommended limits is highly prevalent in much of the world, and strong epidemiological associations exist between moderate alcohol consumption and risk of several major chronic diseases, including coronary heart disease, diabetes, and breast cancer. In many cases, plausible...... biological mediators for these associations have been identified in randomized trials, but gold standard evidence that moderate drinking causes or prevents any chronic disease remains elusive and important concerns about available evidence have been raised. Although long-term randomized trials to test...... suggests that objections to the execution of a full-scale, long-term clinical trial of moderate drinking on chronic disease are increasingly untenable. We present potential lessons learned for such a trial and discuss key features to maximize its feasibility and value....

  13. Graphite moderated {sup 252}Cf source

    Energy Technology Data Exchange (ETDEWEB)

    Sajo B, L.; Barros, H.; Greaves, E. D. [Universidad Simon Bolivar, Nuclear Physics Laboratory, Apdo. 89000, 1080A Caracas (Venezuela, Bolivarian Republic of); Vega C, H. R., E-mail: fermineutron@yahoo.com [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico)

    2014-08-15

    The thorium molten salt reactor is an attractive and affordable nuclear power option for developing countries with insufficient infrastructure and limited technological capability. In the aim of personnel training and experience gathering at the Universidad Simon Bolivar there is in progress a project of developing a subcritical thorium liquid fuel reactor. The neutron source to run this subcritical reactor is a {sup 252}Cf source and the reactor will use high-purity graphite as moderator. Using the MCNP5 code the neutron spectra of the {sup 252}Cf in the center of the graphite moderator has been estimated along the channel where the liquid thorium salt will be inserted; also the ambient dose equivalent due to the source has been determined around the moderator. (Author)

  14. The case for moderate gun control.

    Science.gov (United States)

    DeGrazia, David

    2014-03-01

    In addressing the shape of appropriate gun policy, this essay assumes for the sake of discussion that there is a legal and moral right to private gun ownership. My thesis is that, against the background of this right, the most defensible policy approach in the United States would feature moderate gun control. The first section summarizes the American gun control status quo and characterizes what I call "moderate gun control." The next section states and rebuts six leading arguments against this general approach to gun policy. The section that follows presents a positive case for moderate gun control that emphasizes safety in the home and society as well as rights whose enforcement entails some limits or qualifications on the right to bear arms. A final section shows how the recommended gun regulations address legitimate purposes, rather than imposing arbitrary restrictions on gun rights, and offers concluding reflections.

  15. High efficiency cyclotron trap assisted positron moderator

    OpenAIRE

    Gerchow, L.; Cooke, D. A.; Braccini, S.; Döbeli, M.; Kirch, K.; Köster, U.; Müller, A.; Van Der Meulen, N. P.; Vermeulen, C.; Rubbia, A.; Crivelli, P.

    2017-01-01

    We report the realisation of a cyclotron trap assisted positron tungsten moderator for the conversion of positrons with a broad keV- few MeV energy spectrum to a mono-energetic eV beam with an efficiency of 1.8(2)% defined as the ratio of the slow positrons divided by the $\\beta^+$ activity of the radioactive source. This is an improvement of almost two orders of magnitude compared to the state of the art of tungsten moderators. The simulation validated with this measurement suggests that usi...

  16. Moderator Demonstration Facility Design and Optimization

    Energy Technology Data Exchange (ETDEWEB)

    McClanahan, Tucker C. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Gallmeier, Franz X. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Iverson, Erik B. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-02-01

    The Spallation Neutron Source (SNS) facility at Oak Ridge National Laboratory (ORNL) is implementing a Moderator Demonstration Facility (MDF) to demonstrate the performance characteristics of advanced moderators central to the Second Target Station (STS) for SNS. The MDF will use the "spare" front-end installation within the SNS accelerator support complex – an ion source, radio-frequency quadrupole (RFQ) accelerator, and medium-energy beam transport (MEBT) chopper - to provide a 2.5 MeV proton beam of peak current 50 mA and maximum pulse length of less than 10 s at a repetition rate of no more than 60 Hz to a suitable neutron-producing target to demonstrate those aspects of moderator performance necessary to meet the goals of the STS design e ort. The accelerator beam parameters are not open to variation beyond that described above - they are fixed by the nature of the spare front-end installation (the Integrated Test Stand Facility; ITSF). Accordingly, there are some neutronic challenges in developing prototypic moderator illumination from a very non-prototypic primary neutron source; the spallation source we are attempting to mimic has an extended neutron source volume approximately 40 cm long (in the direction of the proton beam), approximately 10 cm wide (horizontally transverse to the proton beam) and approximately 5 cm high (vertically transverse to the proton beam), and an isotropic evaporation energy spectrum with mean energy above 1 MeV. In contrast, the primary neutron source available from the 7Li(p,n) reaction (the most prolific at 2.5 MeV proton energy by more than an order of magnitude) is strongly anisotropic, with an energy spectrum that is both strongly dependent on emission angle and kinematically limited to less than 700 keV, and the interaction zone between the incident protons and any target material (neutron-producing or not) is intrinsically limited to a few tens of microns. The MDF will be unique and innovative amongst the world

  17. Moderate alcohol consumption and cognitive risk

    Directory of Open Access Journals (Sweden)

    Neafsey EJ

    2011-08-01

    Full Text Available Edward J Neafsey, Michael A CollinsDepartment of Molecular Pharmacology and Therapeutics, Loyola University Chicago, Stritch School of Medicine, Maywood, IL, USAAbstract: We reviewed 143 papers that described the relationship between moderate drinking of alcohol and some aspect of cognition. Two types of papers were found: (1 those that provided ratios of risk between drinkers and nondrinkers (74 papers in total and (2 those that, although they did not provide such ratios, allowed cognition in drinkers to be rated as “better,” “no different,” or “worse” than cognition in nondrinkers (69 papers in total. The history of research on moderate drinking and cognition can be divided into two eras: 1977–1997 and 1998–present. Phase I (1977–1997 was the era of neuropsychological evaluation involving mostly young to middle-aged (18–50 years old subjects. Although initial studies indicated moderate drinking impaired cognition, many later studies failed to confirm this, instead finding no difference in cognition between drinkers and nondrinkers. Phase II (1998–present was and is the era of mental status exam evaluation involving mostly older (≥55 years old subjects. These studies overwhelmingly found that moderate drinking either reduced or had no effect on the risk of dementia or cognitive impairment. When all the ratios of risk from all the studies in phase II providing such ratios are entered into a comprehensive meta-analysis, the average ratio of risk for cognitive risk (dementia or cognitive impairment/decline associated with moderate “social” (not alcoholic drinking of alcohol is 0.77, with nondrinkers as the reference group. The benefit of moderate drinking applied to all forms of dementia (dementia unspecified, Alzheimer’s disease, and vascular dementia and to cognitive impairment (low test scores, but no significant benefit against cognitive decline (rate of decline in test scores was found. Both light and moderate

  18. What's the Point of Moderation? A Discussion of the Purposes Achieved through Contemporary Moderation Practices

    Science.gov (United States)

    Bloxham, Sue; Hughes, Clair; Adie, Lenore

    2016-01-01

    An increasingly regulated higher education sector is renewing its attention to those activities referred to as "moderation" in its efforts to ensure that judgements of student achievement are based on appropriate standards. Moderation practices conducted throughout the assessment process can result in purposes identified as equity,…

  19. Mediated moderation or moderated mediation: relationship between length of unemployment, resilience, coping and health.

    Science.gov (United States)

    Sojo, Víctor; Guarino, Leticia

    2011-05-01

    The aim of the present research was to evaluate a model of mediated moderation vs. moderated mediation that could explain the relationship between length of unemployment, dispositional resilience, coping styles and depression and social functioning of Venezuelan unemployed individuals. Self-report measures were administered to a sample of 328 unemployed residents in Caracas, Venezuela. Results indicated that emotional coping acted as a mediator in the relationship between resilience and depression. Individuals with greater resilience used more detachment coping when unemployment was longer, while individuals with poorer resilience in the same situation used less avoidance coping. Resilience acted as a protective moderating factor between longer periods of unemployment and social functioning, a process mediated by detachment coping. Overall, results supported a mediated moderation model, with resilience as the moderating factor and coping as the mediator in the relation between stress due to the length of unemployment and well-being.

  20. Moderate takes key science role in Congress

    CERN Multimedia

    MacIlwain, C

    2001-01-01

    Sherry Boehlert has been named as chair of the Science committee in the US House of Representatives. Described as a moderate Republican with a keen interest in environmental and energy issues, it is seen as a good appointment by scientists (1/2 page)

  1. High conversion heavy water moderated reactor

    International Nuclear Information System (INIS)

    Miyawaki, Yoshio; Wakabayashi, Toshio.

    1989-01-01

    In the present invention, fuel rods using uranium-plutonium oxide mixture fuels are arranged in a square lattice at the same pitch as that in light water cooled reactor and heavy water moderators are used. Accordingly, the volume ratio (Vm/Vf) between the moderator and the fuel can be, for example, of about 2. When heavy water is used for the moderator (coolant), since the moderating effect of heavy water is lower than that of light water, a high conversion ratio of not less than 0.8 can be obtained even if the fuel rod arrangement is equal to that of PWR (Vm/Vf about 2). Accordingly, it is possible to avoid problems caused by dense arrangement of fuel rods as in high conversion rate light water cooled reactors. That is, there are no more troubles in view of thermal hydrodynamic characteristics, re-flooding upon loss of coolant accident, etc., as well as the fuel production cost is not increased. (K.M.)

  2. Financial fragility in the Great Moderation

    NARCIS (Netherlands)

    Bezemer, Dirk; Grydaki, Maria

    2014-01-01

    A nascent literature explores the measurement of financial fragility. This paper considers evidence for rising financial fragility during the 1984-2007 Great Moderation in the U.S. The literature suggests that macroeconomic stability combined with strong growth of credit to asset markets, in asset

  3. Online Moderation of Synchronous E-Argumentation

    Science.gov (United States)

    Asterhan, Christa S. C.; Schwarz, Baruch B.

    2010-01-01

    In this paper, we present findings on moderation of synchronous, small-group argumentation in blended, co-located learning environments. Drawing on findings from the literature on human facilitation of dialogue in face-to-face settings, we first elaborate on the potential promise of this new practice. However, little is known about what…

  4. Golimumab for moderate to severe ulcerative colitis

    NARCIS (Netherlands)

    Strik, Anne S.; Berends, Sophie E.; Mathôt, Ron A.; D'Haens, Geert R.; Löwenberg, Mark

    2017-01-01

    Golimumab (GLM) is a subcutaneously administered human anti-tumor necrosis factor (TNF) agent that has been approved by the regulatory authorities for the treatment of moderate to severe ulcerative colitis (UC) in 2013. Areas covered: Maintained clinical remission rates up to 50% have been shown in

  5. Moderation of Peer Assessment in Group Projects

    Science.gov (United States)

    Bushell, Graeme

    2006-01-01

    It is shown here that a grade distribution scheme commonly used to moderate peer assessments where self assessment is excluded is based on a false premise and will give an erroneous ranking in the situation where the best performer in a student group ranks the second best performer much higher than the other group members. An alternative to…

  6. Drivers and moderators of business decline

    Directory of Open Access Journals (Sweden)

    Marius Pretorius

    2010-12-01

    Full Text Available Purpose: Reports of business failure elicit various reactions, while research in this domain often appears to be limited by a lack of access to information about failure and by the negativity that surrounds it. Those who have experienced failure do not readily talk about it, or they disappear from the radar screen of researchers. Yet failure is preceded by decline which, when focused on strategically, can reduce eventual failures if early action is taken. The main purpose of this study is to develop a conceptual framework or typology of the drivers and moderators of business decline. Design/methodology/approach: After applying the "grounded theory" approach to the academic literature on decline and failure, a conceptual framework for the variables that drive and moderate business decline is proposed. Findings: The study proposes that decline has three core drivers, three peripheral drivers and four moderators. The core drivers identified are: resource munificence; leadership as origin; and causality (strategic versus operational origin of decline. The three peripheral drivers are: unique preconditions; continuous decisions impact; and extremes dichotomy. The study describes four moderators of the drivers: life cycle stage; stakeholder perspective; quantitative versus qualitative nature of signs and causes; and finally the age and size effects. Research limitations/implications: The proposed conceptual framework is based on literature only, although it has found support during discussions with practitioners. It is proposed to readers of this journal for scrutiny and validation. Practical implications: Strategists need to understand what drives decline in order to act timeously; practitioners who have an insight into the moderators with their impacts could make better decisions in response to decline in organisations and possibly avoid business failure. Originality/Value: Understanding business decline is still a huge theoretical challenge, which

  7. Management of moderate wind energy coastal resources

    International Nuclear Information System (INIS)

    Karamanis, D.

    2011-01-01

    Research highlights: → Life cycle analysis reveals the viability of moderate wind fields utilization. → Wind turbine is the greenest electricity generator at a touristic site. → Wind parks should be collective applications of small hotel-apartments owners. -- Abstract: The feasibility of wind energy utilization at moderate wind fields was investigated for a typical touristic coastal site in Western Greece. Initially, the wind speed and direction as well as its availability, duration and diurnal variation were assessed. For an analysis period of eight years, the mean wind speed at ten meters was determined as 3.8 m s -1 with a small variation in monthly average wind speeds between 3.0 (January) and 4.4 m s -1 (October). The mean wind power density was less than 200 W m -2 at 10 m indicating the limiting suitability of the site for the usual renewable energy applications. However, life cycle analysis for wind turbine generators with lower cut-in, cut-out, and rated speeds revealed that the energy yield ratio can reach a value of six for a service life of 20 years while the energy pay-back period can be 3 years with 33 kt CO 2 -e of avoided greenhouse emissions. Therefore, the recent technological turbine improvements make wind power viable even at moderate wind fields. Moreover, the study of electricity supply of typical small hotel-apartments in the region of Western Greece indicated that the installation of 300 wind turbine generators in these moderate wind fields would cover the total consumption during the open touristic period with profits during the rest of the year. According to these results, wind turbine generators are the 'greenest' way of generating electricity in touristic coastal sites, even of moderate wind speeds.

  8. Edward Lucas : Eesti parim kaitse on kontrast Venemaaga / Edward Lucas ; interv. Liisa Past

    Index Scriptorium Estoniae

    Lucas, Edward

    2008-01-01

    The Economist Kesk- ja Ida-Euroopa korrespondent vastab küsimustele, mis puudutavad tema raamatut "Uus külm sõda", võimuvahetust Venemaal ja vene raha mõju maailmapoliitikale, USA uue administratsiooni Vene-poliitikat ning Eesti-Venemaa suhteid

  9. Edward Lucas: ajaloorindel ei ole Venemaa võitmas / Edward Lucas ; interv. Vahur Koorits

    Index Scriptorium Estoniae

    Lucas, Edward

    2008-01-01

    Ilmunud ka: Postimees : na russkom jazõke 29. apr. lk. 2-3. Ajakirja Economist ajakirjanik vastab küsimustele, mis puudutavad Eesti valitsuse ja peaminister Andrus Ansipi käitumist pronksiööde ajal, välisministeeriumi tööd, Eesti poliitilist kapitali ja välispoliitikat, lääneriikide suhtumist ajaloosündmustesse ja Venemaa ajaloonägemust. Vt. samas: Erinevad arvamused; Anna Levandi. Pronkssõduri teisaldamise viis jättis suhu paha maigu

  10. Reconceptualising Moderation in Asynchronous Online Discussions Using Grounded Theory

    Science.gov (United States)

    Vlachopoulos, Panos; Cowan, John

    2010-01-01

    This article reports a grounded theory study of the moderation of asynchronous online discussions, to explore the processes by which tutors in higher education decide when and how to moderate. It aims to construct a theory of e-moderation based on some key factors which appear to influence e-moderation. It discusses previous research on the…

  11. Diagnosis of moderate acute radiation sickness

    International Nuclear Information System (INIS)

    Yu Shoucheng; Chen Zhijian; Chen Youxin

    1989-01-01

    Forty patients with malignant lymphoma were given 60 Co TLI. 21 cases received 6 Gy and 19 received 8 Gy. It was estimated that a single TLI of 6 and 8 Gy would correspond to TBI of 3.55 Gy and 4.25 Gy (average values) by analysing peripheral blood cell chromosome aberrations and 1.85-2.37 Gy by measuring red bone marrow stem cells clinically. Moderate acute radiation sickness with digestive tract reaction and hemopoietic and immunologic depression was observed. WBC and platelets decreased rapidly. Lymphocytes showed quantitative and qualitative changes even at early stage. All these indexes are significant for diagnosis. Besides, the degree of labial stimulation response, levels of C-reactive protein, corticoid, and urinal nucleoside and alkaloid base presented great changes both pre-and post-irradiation. Early diagnosis of moderate acute radiation sickness could be made in cancer patients subjected to 6-8 Gy TLI

  12. Integrating mediation and moderation to advance theory development and testing.

    Science.gov (United States)

    Karazsia, Bryan T; Berlin, Kristoffer S; Armstrong, Bridget; Janicke, David M; Darling, Katherine E

    2014-03-01

    The concepts and associated analyses of mediation and moderation are important to the field of psychology. Although pediatric psychologists frequently incorporate mediation and moderation in their theories and empirical research, on few occasions have we integrated mediation and moderation. In this article, conceptual reasons for integrating mediation and moderation are offered. We illustrate a model that integrates mediation and moderation. In our illustration, the strength of an indirect or a mediating effect varied as a function of a moderating variable. Clinical implications of the integration of mediation and moderation are discussed, as is the potential of integrated models to advance research programs in pediatric psychology.

  13. Moderator materials for the Spallation Neutron Source

    International Nuclear Information System (INIS)

    Charlton, L.A.

    1999-01-01

    The Spallation Neutron Source (SNS) is a neutron source providing intense neutron fluxes that will be used for performing a large variety of neutron scattering experiments. SNS is to be completed and start operation in 2005. Protons will be accelerated to 1 GeV, stored in an accumulator ring, and then injected into a neutron-producing target. After leaving the target (Hg in the ca/se of SNS), the neutrons are prepared for experiments by first using a moderator to impose energy and width requirements on the neutron pulse. One of the most important ingredients is the moderator material. Four materials that are commonly used and that were considered for use in SNS are liquid hydrogen (L-H 2 ), liquid water (L-H 2 O), liquid methane (L-CH 4 ), and solid methane (S-CH 4 ). The spectra (neutron current versus neutron energy) for these four materials are shown. As may be seen, at low neutron energies ( 4 , which produces up to four times as many neutrons in this energy range as L-H 2 . The problem with the material is the internal storage of energy that can be spontaneously and explosively released. At energies of just above 10 MeV, the most effective moderator material is L-CH 4 . Polymerization problems, however, preclude its use at high powers (again such as in SNS), where the buildup of undesirable materials becomes prohibitive. This is, however, an important energy range for neutron experiments. Preliminary consideration is being given to a composite moderator that contains two adjacent sections, one of L-H 2 and one of L-H 2 O, which produces a spectrum that is very similar to L-CH 4

  14. Neutron transport from targets to moderators

    International Nuclear Information System (INIS)

    Taylor, A.D.

    1981-06-01

    By appropriately choosing parameters such as temperature, decoupler, thickness and effective size it is possible to tailor the moderators of a pulsed spallation neutron source in such a way that the different characteristics regarding time structure and spectral distribution as requested for the different instruments can be met very closely. This enables a unique flexibility in the design of neutron spectrometers to be used at such a source. (author)

  15. Graphite-moderated and heavy water-moderated spectral shift controlled reactors

    International Nuclear Information System (INIS)

    Alcala Ruiz, F.

    1984-01-01

    It has been studied the physical mechanisms related with the spectral shift control method and their general positive effects on economical and non-proliferant aspects (extension of the fuel cycle length and low proliferation index). This methods has been extended to non-hydrogenous fuel cells of high moderator/fuel ratio: heavy water cells have been con- trolled by graphite rods graphite-moderated and gas-cooled cells have been controlled by berylium rods and graphite-moderated and water-cooled cells have been controlled by a changing mixture of heavy and light water. It has been carried out neutron and thermal analysis on a pre design of these types of fuel cells. We have studied its neutron optimization and their fuel cycles, temperature coefficients and proliferation indices. Finally, we have carried out a comparative analysis of the fuel cycles of conventionally controlled PWRs and graphite-moderated, water-cooled and spectral shift controlled reactors. (Author) 71 refs

  16. Moderator temperature coefficient in BWR core

    International Nuclear Information System (INIS)

    Naito, Yoshitaka

    1977-01-01

    Temperature dependences of infinite multiplication factor k sub(infinity) and neutron leakage from the core must be examined for estimation of moderator temperature coefficient. Temperature dependence on k sub(infinity) has been investigated by many researchers, however, the dependence on neutron leakage of a BWR with cruciformed control rods has hardly been done. Because there are difficulties and necessity on calculations of three space dimensional and multi-energy groups neutron distribution in a BWR core. In this study, moderator temperature coefficients of JPDR-II (BWR) core were obtained by calculation with DIFFUSION-ACE, which is newly developed three-dimensional multi-group computer code. The results were compared with experimental data measured from 20 to 275 0 C of the moderator temperature and the good agreement was obtained between calculation and measurement. In order to evaluate neutron leakage from the core, the other two calculations were carried out, adjusting criticality by uniform absorption rate and by material buckling. The former underestimated neutron leakage and the latter overestimated it. Discussion on the results shows that in order to estimate the temperature coefficient of BWR, neutron leakage must be evaluated precisely, therefore the calculation at actual pattern of control rods is necessary. (auth.)

  17. Optimization of moderators and beam extraction at the ESS

    Czech Academy of Sciences Publication Activity Database

    Andersen, K. H.; Bertelsen, M.; Zanini, L.; Klinkby, E. B.; Schonfeldt, T.; Bentley, P. M.; Šaroun, Jan

    2018-01-01

    Roč. 51, č. 4 (2018), s. 264-281 ISSN 1600-5767 R&D Projects: GA MŠk LM2015048 Institutional support: RVO:61389005 Keywords : water moderators * para-hydrogen moderators * low-dimensional moderators * pancake moderators * butterfly moderators * brilliance transfer * neutron instruments Subject RIV: BM - Solid Matter Physics ; Magnetism OBOR OECD: Condensed matter physics (including formerly solid state physics, supercond.) Impact factor: 2.495, year: 2016

  18. Therapy of moderate and severe psoriasis

    Directory of Open Access Journals (Sweden)

    Werfel, Thomas

    2006-04-01

    Full Text Available Objective and methods: This health technology assessment (HTA report synthesises systematically randomized controlled studies (RCT on the therapy of moderate and severe psoriasis vulgaris which were published between 1999 and 2004; it includes some important clinical studies which have been published after 2004 and thus updates the English HTA report by Griffiths et al. [1]. The major objective is the evaluation of the medical effectiveness of different therapeutical approaches and the cost effectiveness with relevance for Germany. Results: The major conclusions from the results of medical RCT on moderate and severe psoriasis vulgaris are: Oral fumarates are effective in the treatment of moderate to severe psoriasis vulgaris. However, fumarates quiet frequently cause moderate side effects. Cyclosporine and methotrexate are both effective in the treatment of severe psoriasis vulgaris. Both substances have a different spectrum of side effects which may limit the individual applicability. Acetritin is only moderately effective in the treatment of severe psoriasis of the plaque type. Calcipotriol or UV-radiation used at the same time can increase the clinical effectiveness of acetritin. Systemic PUVA, balneo-PUVA and UVB therapy are all effective for the treatment of severe psoriasis. The combination of UV therapy with vitamin D3 analogues or with topical steroids is more effective than the treatment with UV radiation alone. Saltwater baths increase the effectiveness of UVB therapy. No RCT on the therapeutical effects of topical tar or of dithranol in combination with UV therapy have been published so far. A continuous therapy with PUVA should not be applied due to its proven photocarcinogenicity. Three substances from the group of biologicals (Efalizumab, Etanercept, and Infliximab are now available in Europe and a further substance (Alefacept is available in the USA for the treatment of moderate to severe psoriasis. All biologicals have been

  19. Optimisation studies for a moderator on a pulsed neutron source

    International Nuclear Information System (INIS)

    Picton, D.J.; Ross, D.K.; Taylor, A.D.

    1982-01-01

    Having reviewed general aspects of moderator design for pulsed neutron sources, calculations are presented on a number of aspects of moderator optimization. Results of time-independent calculations on metal hydride moderators and a detailed method of evaluating moderated pulse intensities and time distributions, are given. Using computer codes, neutron cross-sections have been calculated from vibrational frequency distributions and time-dependent moderator calculations performed by Monte Carlo methods. The choice of an ambient moderator material and the optimum configuration of heterogeneous poisoning are examined and evaluations of liquid-nitrogen-cooled moderators are presented. Conclusions are drawn concerning the relative merits of cooled and poisoned moderators and an evaluation presented of solid methane at 20 K as a moderator for the production of cold neutrons. (U.K.)

  20. Halophilic Amylase from a Moderately Halophilic Micrococcus

    Science.gov (United States)

    Onishi, Hiroshi

    1972-01-01

    A moderately halophilic Micrococcus sp., isolated from unrefined solar salt, produced a considerable amount of extracellular dextrinogenic amylase when cultivated aerobically in media containing 1 to 3 m NaCl. The Micrococcus amylase had maximal activity at pH 6 to 7 in 1.4 to 2 m NaCl or KCl at 50 C. Calcium ion and a high concentration of NaCl or KCl were essential for activity and stability of the amylase. The salt response of the amylase depended greatly on the pH and temperature of the enzyme assay. PMID:5058445

  1. Moderate resolution spectrophotometry of high redshift quasars

    Science.gov (United States)

    Schneider, Donald P.; Schmidt, Maarten; Gunn, James E.

    1991-01-01

    A uniform set of photometry and high signal-to-noise moderate resolution spectroscopy of 33 quasars with redshifts larger than 3.1 is presented. The sample consists of 17 newly discovered quasars (two with redshifts in excess of 4.4) and 16 sources drawn from the literature. The objects in this sample have r magnitudes between 17.4 and 21.4; their luminosities range from -28.8 to -24.9. Three of the 33 objects are broad absorption line quasars. A number of possible high redshift damped Ly-alpha systems were found.

  2. Developing food supplements for moderately malnourished children

    DEFF Research Database (Denmark)

    Briend, André; Akomo, Peter; Bahwere, Paluku

    2015-01-01

    ). The resulting products proved highly effective in promoting weight gain in both severely and moderately wasted children and adults, including those infected with HIV. The formulation of the existing RUTFs, however, has never been optimized to maximize linear growth, vitamin and mineral status, and functional...... of protein quality, antinutrient content, and flatulence factors that will result from the replacement of current dairy ingredients by less expensive protein-rich ingredients. The formulation of alternative RUTFs will require further research on these aspects, followed by efficacy studies comparing...

  3. Diplopia Following Short Treatment for Moderate Amblyopia.

    Science.gov (United States)

    Hoole, Janice; Barrow, Natasha

    2017-09-01

    A case of an autistic child, aged 8 years, who reported binocular diplopia following just 2 hours total occlusion per day for 6 weeks for strabismic/anisometropic amblyopia is reported. There was a history of known long-standing reduced uniocular acuity without treatment. Pretreatment Sbisa bar assessment suggested moderate suppression. The diplopia was treated over 6 months including occluding the amblyopic eye and gradually reducing the density of the occluder until fixation with the nonamblyopic eye could be maintained and diplopia ignored. Possible contributing factors are discussed.

  4. Fuel to Moderator Ratio Sensitivity Study Using Water Rod Moderator in SCWR Conceptual Core Design

    International Nuclear Information System (INIS)

    Bae, Seong Man; Kim, Yong Bae; Park, Dong Hwan; Lee, Kwang Ho

    2009-01-01

    The conceptual operating condition of Super Critical Water-cooled Reactor (SCWR) is above critical point of water, such that the coolant temperature ranges from 280 .deg. C to 510 .deg. C with a pressure of 25MPa. This operating condition makes an SCWR have both merits and demerits when compared with current Light Water Reactors (LWRs). One of the demerits of SCWR is degradation of neutron moderation due to a lower water density from ∼0.1g/cm 3 to ∼0.7g/cm 3 under a high coolant temperature condition. Therefore it is necessary to enhance the moderation capability for SCWR to slow down the fast fission neutrons. Many SCWR designs have a water rod concept as an additional moderator, because water has a good moderation capability. Through reviewing the previous water rod assembly designs, it was identified that a sensitivity study is required to optimize fuel assembly pitch to increase the neutron economy. In this paper, the results of the conceptual assembly design sensitivity study which focuses on the comparison of sensitivity for the fuel pitch to diameter (P/D) ratio using water rod moderator, are presented

  5. Development of a cone-geometry positron moderator

    International Nuclear Information System (INIS)

    Lynn, K.G.; Gramsch, E.; Usmar, S.G.; Sferlazzo, P.

    1989-01-01

    Results are presented on a new cone-shaped positron moderator which shows a high moderator efficiency (i.e., conversion of beta decay to emitted slow positrons). The moderator efficiencies for the cone moderators studied were found to be up to 0.14% compared to thin-foil measurements of 0.06% in the same experimental system including identical source and holder. These moderators are rugged and easily fabricated, however, they have a lower brightness than single-crystal foil moderators. Comparison of various geometries is presented as well as suggestions for further improvements to increase the total efficiencies

  6. Antecedents and Moderators of Software Professionals’ Performance

    Directory of Open Access Journals (Sweden)

    Shiva Prasad H. C.

    2014-02-01

    Full Text Available Software professionals’ (SPs' performance is often understood narrowly in terms of input–output productivity. This study approaches performance from a broader perspective and examines whether the emotional intelligence competencies (EICs of SPs, the leadership style of team leaders, social capital among team members, and human resource management (HRM practices of software firms affect performance of SPs. It also tests whether the value of and opportunities for knowledge sharing moderate such relationships. Data were collected from 441 Indian SPs in a questionnaire survey. Fifty-five team leaders assessed the performance of SPs, and SPs assessed the other constructs. Results revealed that EICs, transformational leadership style, social capital, and HRM practices positively affect performance. EICs are the most important predictors of performance. Under high (low value of and high (low opportunities for knowledge sharing, the antecedents influencing performance are strengthened (attenuated or nullified. The value of and opportunities for knowledge sharing are quasi-moderators. These findings have significant implications for organizing effective work teams.

  7. Neutron moderation at very low temperatures (1691)

    International Nuclear Information System (INIS)

    Lacaze, A.

    1961-04-01

    Starting from Harwell experiment carried out inside a low-power reactor, we intended to maintain a liquid hydrogen cell in a channel of the EL3 reactor (at Saclay) whose thermal neutrons flux is 10 14 neutrons/cm 2 /s. We tried to work out a device giving off an important beam of cold neutrons and able to operate in a way as automatic as possible during many consecutive day without a stop. Several circuits have already been achieved at very low temperatures but they brought out volumes and fluxes much lower than those we used this time. The difficulties we have met in carrying out such a device arose on the one hand from the very high energy release to which any kind of experiment is inevitably submitted when placed near the core of the reactor, on the other, hand from the very little room which is available in experimental channels of reactors. In such condition, it is necessary to use a moderator as effective as possible. This study is divided into three parts ; in the first part, we try to determine: a) conditions in which moderation takes place, hence the volume of the cell; b) materials likely to be used at low temperature and in pile; c) cooling system; hence we had to study fluid flow conditions at very low temperatures in very long ducts. The second part is devoted to the description of the device. The third part ventilates the results we have obtained. (author) [fr

  8. Neutron transport from targets to moderators

    International Nuclear Information System (INIS)

    Taylor, A.D.

    1980-01-01

    The title of this meeting is 'Targets for Neutron Beam Spallation Sources', but so far all the emphasis in the talks has been on how to produce the fast neutron flux. I would like to stress that that is just the beginning of the story. What we are required to produce are beams of thermal and epithermal neutrons with time and spectral characteristics tailored to the instrumental requirements. The real source of our neutrons is not uranium arrays or thorium cylinders but a small volume of hydrogenous material, some 10 x 10 x 5 cm 3 . This is really what the whole thing is about - the target produces a copious field of fast neutrons, but if we fail to moderate them with the right energy and time characteristics, we will not match to what is happening downstream. In this talk, I am going to deal specifically with what we have done for SNS to optimise the target-moderator-reflector and decoupler system in this respect. (orig.)

  9. Cardiopulmonary Changes with Moderate Decompression in Rats

    Science.gov (United States)

    Robinson, R.; Little, T.; Doursout, M.-F.; Butler, B. D.; Chelly, J. E.

    1996-01-01

    Sprague-Dawley rats were compressed to 616 kPa for 120 min then decompressed at 38 kPa/min to assess the cardiovascular and pulmonary responses to moderate decompression stress. In one series of experiments the rats were chronically instrumented with Doppler ultrasonic probes for simultaneous measurement of blood pressure, cardiac output, heart rate, left and right ventricular wall thickening fraction, and venous bubble detection. Data were collected at base-line, throughout the compression/decompression protocol, and for 120 min post decompression. In a second series of experiments the pulmonary responses to the decompression protocol were evaluated in non-instrumented rats. Analyses included blood gases, pleural and bronchoalveolar lavage (BAL) protein and hemoglobin concentration, pulmonary edema, BAL and lung tissue phospholipids, lung compliance, and cell counts. Venous bubbles were directly observed in 90% of the rats where immediate post-decompression autopsy was performed and in 37% using implanted Doppler monitors. Cardiac output, stroke volume, and right ventricular wall thickening fractions were significantly decreased post decompression, whereas systemic vascular resistance was increased suggesting a decrease in venous return. BAL Hb and total protein levels were increased 0 and 60 min post decompression, pleural and plasma levels were unchanged. BAL white blood cells and neutrophil percentages were increased 0 and 60 min post decompression and pulmonary edema was detected. Venous bubbles produced with moderate decompression profiles give detectable cardiovascular and pulmonary responses in the rat.

  10. Moderation in Australia-Policy and Achievements

    Directory of Open Access Journals (Sweden)

    CREINA STOCKLEY

    2004-01-01

    Full Text Available Alcohol has been consumed in Australia since European settlement in 1788. In 1998, approximately 60 % of Australians consumed an alcoholic beverage at least once per week. The effects of alcohol on the human body are dose dependent, where the harmful effects of alcohol are generally observed only when alcohol consumption exceeds moderate consumption levels of 30 to 40 g of alcohol per day. The discovery that a J-shaped curve described the relationship between level of alcohol consumption and risk of cardiovascular disease was, however, only made in 1990_cardiovascular disease is the leading cause of death in the western world. Thus prior to 1990, Australian public health policy focused primarily on the harmful effects of alcohol consumption and the health benefits of a moderate level of alcohol consumption have only recently been recognized in public policy. This paper chronicles changes in Australian Federal government policy on alcohol since the initial draft National health policy on alcohol in Australia was presented to the Ministerial Council on Drug Strategy in 1987 to the National Drug Strategic plan for action 2001 to 2003-2004 which was launched in July last year

  11. Method of operating heavy water moderated reactors

    International Nuclear Information System (INIS)

    Masuda, Hiroyuki.

    1980-01-01

    Purpose: To enable stabilized reactor control, and improve the working rate and the safety of the reactor by removing liquid poison in heavy water while maintaining the power level constant to thereby render the void coefficient of the coolants negative in the low power operation. Method: The operation device for a heavy water moderated reactor comprises a power detector for the reactor, a void coefficient calculator for coolants, control rods inserted into the reactor, a poison regulator for dissolving poisons into or removing them out of heavy water and a device for removing the poisons by the poison regulator device while maintaining the predetermined power level or inserting the control rods by the signals from the power detector and the void coefficient calculator in the high temperature stand-by conditions of the reactor. Then, the heavy water moderated reactor is operated so that liquid poisons in the heavy water are eliminated in the high temperature stand-by condition prior to the start for the power up while maintaining the power level constant and the plurality of control rods are inserted into the reactor core and the void coefficient of the coolants is rendered negative in the low power operation. (Seki, T.)

  12. Kinetics of homocysteine metabolism after moderate alcohol consumption

    NARCIS (Netherlands)

    Beulens, J.W.J.; Sierksma, A.; Schaafsma, G.; Kok, F.J.; Struys, E.A.; Jakobs, C.; Hendriks, H.F.J.

    2005-01-01

    Background: Moderate alcohol consumption is associated with a decreased risk of cardiovascular disease. Because plasma homocysteine (tHcy) is considered an independent risk factor for cardiovascular disease and associated with alcohol consumption, the authors investigated the effect of moderate

  13. Kinetics of homocysteine metabolism after moderate alcohol consumption

    NARCIS (Netherlands)

    Beulens, J.W.J.; Sierksma, A.; Schaafsma, G.; Kok, F.J.; Struys, E.A.; Jakobs, C.; Hendriks, H.F.J.

    2005-01-01

    Moderate alcohol consumption is associated with a decreased risk of cardiovascular disease. Because plasma homocysteine (tHcy) is considered an independent risk factor for cardiovascular disease and associated with alcohol consumption, the authors investigated the effect of moderate alcohol

  14. Performance of novel moderator for pulsed neutron diffraction

    International Nuclear Information System (INIS)

    Mayer, R.E.; Granada, J.R.; Dawidowski, J.; Gillette, V.H.

    1991-01-01

    Measurements of neutron pulse time-width and intensity have been carried out on grids of small moderators placed side by side and decoupled by cadmium strips. This moderator concept had been introduced at ICANS-10. The present measurements explore greater moderator thicknesses than those previously attained, yielding information on thickness optimization, while confirming the previous results on resolution which make this moderator a favourable choice in front of the conventional sandwich set-up. (author)

  15. Neutronic moderator design for the Spallation Neutron Source (SNS)

    International Nuclear Information System (INIS)

    Charlton, L.A.; Barnes, J.M.; Johnson, J.O.; Gabriel, T.A.

    1998-01-01

    Neutronics analyses are now in progress to support the initial selection of moderator design parameters for the Spallation Neutron Source (SNS). The results of the initial optimization studies involving moderator poison plate location, moderator position, and premoderator performance for the target system are presented in this paper. Also presented is an initial study of the use of a composite moderator to produce a liquid methane like spectrum

  16. Nonprofit brand strength’s moderational role

    Directory of Open Access Journals (Sweden)

    Walter Wymer

    2015-03-01

    Full Text Available The nature and characteristics of the nonprofit brand strength construct are conceptualized. Brand strength is defined as a multidimensional construct, composed by brand familiarity, brand remarkability, and brand attitude. Brand familiarity refers to the level of knowledge the target audience has about the brand object. Brand attitude refers to the degree to which a brand object is perceived favorably by a target group. Brand remarkability refers to the degree to which a brand object is perceived by a target group to be extraordinary. In the brand management nomological net, brand strength acts as a moderator, influencing the strength of the relationship between marketing tactics (antecedents and marketing outcomes (consequents. Brand strength’s inter-dimensional relationships are conceptualized. A brand strength strategy grid is presented, which informs brand management strategy based on a brand’s current levels of brand familiarity and brand remarkability.

  17. Characteristic analysis on moderating material for obtaining epithermal neutron beam

    International Nuclear Information System (INIS)

    Jiang Xinbiao; Chen Da; Zhang Ying

    2000-01-01

    The one dimension discrete coordinates transport code ANISN was used to calculate three-group constants of 11 elements which could be used to consist moderating epithermal neutron material of beam. Moderating character of simple substances, compounds and mixtures consisted of the optimized elements analyzed three kinds of moderating materials were optimized for epithermal neutron beam

  18. Some neutronic studies on flux-trap type moderator

    International Nuclear Information System (INIS)

    Kiyanagi, Y.; Watanabe, N.

    1991-01-01

    The neutronic performance of a flux-trap type moderator was studied by computer simulation in connection with the KENS-II target-moderator system. It was confirmed that this system can provide 1.3-1.4 times higher neutron intensity than a traditional wing-geometry moderator system. (author)

  19. Preliminary thermal-hydraulic and structural strength analyses for pre-moderator of cold moderator

    International Nuclear Information System (INIS)

    Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsuhiko; Hino, Ryutaro

    2001-08-01

    A light-water cooled pre-moderator with a thin-walled structure made of aluminum alloy is installed around a liquid hydrogen moderator in order to enhance the neutron performance of a MW-scale spallation target system which is being developed in the Japan Atomic Energy Research Institute (JAERI). Since the pre-moderator is needed to be located close to a target working as a neutron source, it is indispensable to remove nuclear heat deposition in the pre-moderator effectively by means of smooth water flow without flow stagnation. Also, the structural integrity of the thin-walled structure should be kept against the water pressure. Preliminary thermal-hydraulic analytical results showed that the water temperature rise could be suppressed less than 1degC while keeping the smooth water flow, which would assure the expected neutron performance. As for the structural integrity, several measures to meet allowable stress conditions of aluminum alloy were proposed on the basis of the preliminary structural strength analyses. (author)

  20. Moderately preterm children need attention! : Behavior and development of moderately preterm children at toddler age

    NARCIS (Netherlands)

    de Jong, M.

    2016-01-01

    Every year, more than 10.000 children in the Netherlands are born moderately preterm after 32 to 36+6 weeks of gestation, which is 6.1% of all births. These children are at risk for difficulties on the short and long term. Previous studies especially found academic problems and difficulties in

  1. Heavy water moderated gas-cooled reactors

    International Nuclear Information System (INIS)

    Bailly du Bois, B.; Bernard, J.L.; Naudet, R.; Roche, R.

    1964-01-01

    France has based its main effort for the production of nuclear energy on natural Uranium Graphite-moderated gas-cooled reactors, and has a long term programme for fast reactors, but this country is also engaged in the development of heavy water moderated gas-cooled reactors which appear to present the best middle term prospects. The economy of these reactors, as in the case of Graphite, arises from the use of natural or very slightly enriched Uranium; heavy water can take the best advantages of this fuel cycle and moreover offers considerable development potential because of better reactor performances. A prototype plant EL 4 (70 MW) is under construction and is described in detail in another paper. The present one deals with the programme devoted to the development of this reactor type in France. Reasons for selecting this reactor type are given in the first part: advantages and difficulties are underlined. After reviewing the main technological problems and the Research and Development carried out, results already obtained and points still to be confirmed are reported. The construction of EL 4 is an important step of this programme: it will be a significant demonstration of reactor performances and will afford many experimentation opportunities. Now the design of large power reactors is to be considered. Extension and improvements of the mechanical structures used for EL 4 are under study, as well as alternative concepts. The paper gives some data for a large reactor in the present state of technology, as a result from optimization studies. Technical improvements, especially in the field of materials could lead to even more interesting performances. Some prospects are mentioned for the long run. Investment costs and fuel cycles are discussed in the last part. (authors) [fr

  2. Heavy water moderated reactors advances and challenges

    International Nuclear Information System (INIS)

    Meneley, D.A.; Olmstead, R.A.; Yu, A.M.; Dastur, A.R.; Yu, S.K.W.

    1994-01-01

    Nuclear energy is now considered a key contributor to world electricity production, with total installed capacity nearly equal to that of hydraulic power. Nevertheless, many important challenges lie ahead. Paramount among these is gaining public acceptance: this paper makes the basic assumption that public acceptance will improve if, and only if, nuclear power plants are operated safely and economically over an extended period of time. The first task, therefore, is to ensure that these prerequisites to public acceptance are met. Other issues relate to the many aspects of economics associated with nuclear power, include capital cost, operation cost, plant performance and the risk to the owner's investment. Financing is a further challenge to the expansion of nuclear power. While the ability to finance a project is strongly dependent on meeting public acceptance and economic challenges, substantial localisation of design and manufacture is often essential to acceptance by the purchaser. The neutron efficient heavy water moderated CANDU with its unique tube reactor is considered to be particularly well qualified to respond to these market challenges. Enhanced safety can be achieved through simplification of safety systems, design of the moderator and shield water systems to mitigate severe accident events, and the increased use of passive systems. Economics are improved through reduction in both capital and operating costs, achieved through the application of state-of-the-art technologies and economy of scale. Modular features of the design enhance the potential for local manufacture. Advanced fuel cycles offer reduction in both capital costs and fuelling costs. These cycles, including slightly enriched uranium and low grade fuels from reprocessing plants can serve to increase reactor output, reduce fuelling cost and reduce waste production, while extending resource utilisation. 1 ref., 1 tab

  3. Mediator and moderator effects in developmental and behavioral pediatric research.

    Science.gov (United States)

    Rose, Brigid M; Holmbeck, Grayson N; Coakley, Rachael Millstein; Franks, Elizabeth A

    2004-02-01

    The terms mediation and moderation are defined and clarified with particular emphasis on the role of mediational and moderational analyses in developmental and behavioral pediatric research. The article highlights the applicability of mediational and moderational analyses to longitudinal, intervention, and risk and protective factor research, and it provides basic information about how these analyses might be conducted. Also included is a discussion of various ways that both mediator and moderator variables can be incorporated into a single model. The article concludes with extended examples of both types of analyses using a longitudinal pediatric study for illustration. The article provides recommendations for applying mediational and moderational research in clinical practice.

  4. Effects of moderation level on core reactivity and. neutron fluxes in natural uranium fueled and heavy water moderated reactors

    International Nuclear Information System (INIS)

    Khan, M.J.; Aslam; Ahmad, N.; Ahmed, R.; Ahmad, S.I.

    2005-01-01

    The neutron moderation level in a nuclear reactor has a strong influence on core multiplication, reactivity control, fuel burnup, neutron fluxes etc. In the study presented in this article, the effects of neutron moderation level on core reactivity and neutron fluxes in a typical heavy water moderated nuclear research reactor is explored and the results are discussed. (author)

  5. Moderate-to-high intensity aerobic exercise in patients with mild to moderate Alzheimer's disease

    DEFF Research Database (Denmark)

    Frederiksen, Kristian S; Sobol, Nanna; Beyer, Nina

    2014-01-01

    OBJECTIVES: Physical exercise may modulate neuropathology and symptoms of Alzheimer's disease (AD). This pilot study assessed the feasibility of conducting a study of moderate-to-high intensity aerobic exercise in home-dwelling patients with mild AD. METHODS: An uncontrolled preintervention......-postintervention test design with a single group receiving the same intervention. A total of eight patients with mild to moderate AD from the Copenhagen Memory clinic were included in the study. The intervention lasted for 14 weeks and consisted of supervised, 1-h sessions of aerobic exercise three times per week (50......-60% of heart rate reserve for a two-week adaptation period and 70-80 % of heart rate reserve for the remaining 12 weeks) Feasibility was assessed based on acceptability, including attendance and drop-out, safety, and patients' and caregivers' attitudes towards the intervention as well as other relevant...

  6. Towards a Moderate Stance on Human Enhancement

    Directory of Open Access Journals (Sweden)

    Nikil Mukerji

    2014-05-01

    Full Text Available In this essay, we argue against radical ethical views about human enhancement that either dismiss or endorse it tout court. Instead, we advocate the moderate stance that issues of enhancement should be examined with an open mind and on a case-by-case basis. To make this view plausible, we offer three reasons. The first lies in the fact that it is difficult to delineate enhancement conceptually, which makes it hard to argue for general ethical conclusions about it. The second is that an appropriate view of the edifice of moral theory suggests that tenable moral judgements about human enhancement are the result of a careful consideration of the pros and cons that attach to the use of a specific enhancement technology. Lastly, we show that important normative factors in the enhancement debate can be used both in arguments for and in arguments against enhancement. The bottom line of our discussion is that we should treat issues of human enhancement like we do any other ethical issue, viz. by weighing up the reasons pro and con.

  7. Moderate pressure plasma source of nonthermal electrons

    Science.gov (United States)

    Gershman, S.; Raitses, Y.

    2018-06-01

    Plasma sources of electrons offer control of gas and surface chemistry without the need for complex vacuum systems. The plasma electron source presented here is based on a cold cathode glow discharge (GD) operating in a dc steady state mode in a moderate pressure range of 2–10 torr. Ion-induced secondary electron emission is the source of electrons accelerated to high energies in the cathode sheath potential. The source geometry is a key to the availability and the extraction of the nonthermal portion of the electron population. The source consists of a flat and a cylindrical electrode, 1 mm apart. Our estimates show that the length of the cathode sheath in the plasma source is commensurate (~0.5–1 mm) with the inter-electrode distance so the GD operates in an obstructed regime without a positive column. Estimations of the electron energy relaxation confirm the non-local nature of this GD, hence the nonthermal portion of the electron population is available for extraction outside of the source. The use of a cylindrical anode presents a simple and promising method of extracting the high energy portion of the electron population. Langmuir probe measurements and optical emission spectroscopy confirm the presence of electrons with energies ~15 eV outside of the source. These electrons become available for surface modification and radical production outside of the source. The extraction of the electrons of specific energies by varying the anode geometry opens exciting opportunities for future exploration.

  8. [Is olfactory function impaired in moderate height?].

    Science.gov (United States)

    Kühn, M; Welsch, H; Zahnert, T; Hummel, Thomas

    2009-09-01

    The human sense of smell seems to be influenced by the surrounding barometric pressure. These factors appear to be especially important during flights, for example, in order to recognize the smell of fire etc. Thus, questions are whether pilots or passengers exhibit an impaired smell sensitivity when tested at moderate heights, or, whether changes in humidity would affect the sense of smell. Using climate chambers, odor discrimination and butanol odor thresholds were tested in 77 healthy normosmic volunteers (5 female, 72 male; aged 25+/-8 years from 18 up to 53 years) under hypobaric (2 700+/-20 m, 20 degrees C+/-1 K, rh=50+/-5%) and hyperbaric, (10+/-0.5 m (2 bar)) and different humidity conditions (30 vs. 80%, 20 degrees C+/-1 K, normobaric). During all conditions cognitive performance was tested. Among other effects, olfactory sensitivity was impaired at threshold, but not suprathreshold level, in a hypobaric compared to a hyperbaric milieu, and thresholds were lower in humid, compared to relatively dry conditions. In conclusion, environmental conditions modulate the sense of smell, and may, consecutively, influence results from olfactory tests. During flight hypobaric conditions, mild hypoxia and dry air may cause impaired sensitivity of smell. Georg Thieme Verlag KG Stuttgart * New York.

  9. Pressure fluctuation caused by moderate acceleration

    Science.gov (United States)

    Tagawa, Yoshiyuki; Kurihara, Chihiro; Kiyama, Akihito

    2017-11-01

    Pressure fluctuation caused by acceleration of a liquid column is observed in various important technologies, e.g. water-hammer in a pipeline. The magnitude of fluctuation can be estimated by two different approaches: When the duration time of acceleration is much shorter than the propagation time for a pressure wave to travel the length of the liquid column, e.g. sudden valve closure for a long pipe, Joukowsky equation is applied. In contrast, if the acceleration duration is much longer, the liquid is modeled as a rigid column, ignoring compressibility of the fluid. However, many of practical cases exist between these two extremes. In this study we propose a model describing pressure fluctuation when the duration of acceleration is in the same order of the propagation time for a pressure wave, i.e. under moderate acceleration. The novel model considers both temporal and spatial evolutions of pressure propagation as well as gradual pressure rise during the acceleration. We conduct experiments in which we impose acceleration to a liquid with varying the length of the liquid column, acceleration duration, and properties of liquids. The ratio between the acceleration duration and the propagation time is in the range of 0.02 - 2. The model agrees well with measurement results. JSPS KAKENHI Grant Numbers 26709007 and 17H01246.

  10. Steam-moderated oxy-fuel combustion

    International Nuclear Information System (INIS)

    Seepana, Sivaji; Jayanti, Sreenivas

    2010-01-01

    The objective of the present paper is to propose a new variant of the oxy-fuel combustion for carbondioxide (CO 2 ) sequestration in which steam is used to moderate the flame temperature. In this process, pure oxygen is mixed with steam and the resulting oxidant mixture is sent to the boiler for combustion with a fossil fuel. The advantage of this method is that flue gas recirculation is avoided and the volumetric flow rates through the boiler and auxiliary components is reduced by about 39% when compared to the conventional air-fired coal combustion power plant leading to a reduction in the size of the boiler. The flue gas, after condensation of steam, consists primarily of CO 2 and can be sent directly for compression and sequestration. Flame structure analysis has been carried out using a 325-step reaction mechanism of methane-oxidant combustion to determine the concentration of oxygen required to ensure a stable flame. Thermodynamic exergy analysis has also been carried out on SMOC-operated CO 2 sequestration power plant and air-fired power plant, which shows that though the gross efficiency increases the absolute power penalty of ∼8% for CO 2 sequestration when compared to air-fired power plant.

  11. Moderating Effects of Sales Promotion Types

    Directory of Open Access Journals (Sweden)

    Fernando de Oliveira Santini

    2015-04-01

    Full Text Available This paper aims to analyze the influence sales promotion types have on the relationship between perception of financial risk and perception of utilitarian and hedonic value on consumer purchase intentions. To this end, an experiment was conducted involving 589 participants divided into two groups defined by distinct scenarios in which the sales promotion type (monetary vs. non-monetary was manipulated. The working hypotheses predicted a direct and positive relationship between the perception of (hedonic and utilitarian consumption value and purchase intention for a promoted product and a negative relationship between the perception of consumption value and the perception of financial risk. In addition, it was supposed that the sales promotion type would moderate these direct relationships and that a monetary promotion would have a stronger effect on the relationship between purchase intention and perceived product utility, whereas a non-monetary promotion would have a stronger effect on the other relationships (hedonic value and financial risk perceptions. Analysis of the outcomes supported the proposed hypotheses.

  12. Moderately reverberant learning ultrasonic pinch panel.

    Science.gov (United States)

    Nikolovski, Jean-Pierre

    2013-10-01

    Tactile sensing is widely used in human-computer interfaces. However, mechanical integration of touch technologies is often perceived as difficult by engineers because it often limits the freedom of style or form factor requested by designers. Recent work in active ultrasonic touch technologies has made it possible to transform thin glass plates, metallic sheets, or plastic shells into interactive surfaces. The method is based on a learning process of touch-induced, amplitude-disturbed diffraction patterns. This paper proposes, first, an evolution in the design with multiple dipole transducers that improves touch sensitivity or maximum panel size by a factor of ten, and improves robustness and usability in moderately reverberant panels, and second, defines a set of acoustic variables in the signal processing for the evaluation of sensitivity and radiating features. For proof of concept purposes, the design and process are applied to 3.2- and 6-mm-thick glass plates with variable damping conditions. Transducers are bonded to only one short side of the rectangular substrates. Measurements show that the highly sensitive free lateral sides are perfectly adapted for pinch-touch and pinch-slide interactions. The advantage of relative versus absolute touch disturbance measurement is discussed, together with tolerance to abutting contaminants.

  13. Steam-moderated oxy-fuel combustion

    Energy Technology Data Exchange (ETDEWEB)

    Seepana, Sivaji; Jayanti, Sreenivas [Department of Chemical Engineering, IIT Madras, Adyar, Chennai 600 036 (India)

    2010-10-15

    The objective of the present paper is to propose a new variant of the oxy-fuel combustion for carbondioxide (CO{sub 2}) sequestration in which steam is used to moderate the flame temperature. In this process, pure oxygen is mixed with steam and the resulting oxidant mixture is sent to the boiler for combustion with a fossil fuel. The advantage of this method is that flue gas recirculation is avoided and the volumetric flow rates through the boiler and auxiliary components is reduced by about 39% when compared to the conventional air-fired coal combustion power plant leading to a reduction in the size of the boiler. The flue gas, after condensation of steam, consists primarily of CO{sub 2} and can be sent directly for compression and sequestration. Flame structure analysis has been carried out using a 325-step reaction mechanism of methane-oxidant combustion to determine the concentration of oxygen required to ensure a stable flame. Thermodynamic exergy analysis has also been carried out on SMOC-operated CO{sub 2} sequestration power plant and air-fired power plant, which shows that though the gross efficiency increases the absolute power penalty of {proportional_to}8% for CO{sub 2} sequestration when compared to air-fired power plant. (author)

  14. Heavy water moderated tubular type nuclear reactor

    International Nuclear Information System (INIS)

    Oohashi, Masahisa.

    1986-01-01

    Purpose: To enable to effectively change the volume of heavy water per unit fuel lattice in heavy water moderated pressure tube type nuclear reactors. Constitution: In a nuclear reactor in which fuels are charged within pressure tubes and coolants are caused to flow between the pressure tubes and the fuels, heavy water tubes for recycling heavy water are disposed to a gas region formed to the outside of the pressure tubes. Then, the pressure tube diameter at the central portion of the reactor core is made smaller than that at the periphery of the reactor core. Further, injection means for gas such as helium is disposed to the upper portion for each of the heavy water tubes so that the level of the heavy water can easily be adjusted by the control for the gas pressure. Furthermore, heavy water reflection tubes are disposed around the reactor core. In this constitution, since the pitch for the pressure tubes can be increased, the construction and the maintenance for the nuclear reactor can be facilitated. Also, since the liquid surface of the heavy water in the heavy water tubes can be varied, nuclear properties is improved and the conversion ratio is improved. (Ikeda, J.)

  15. A Moderate Redshift Supernova Search Program

    Science.gov (United States)

    Adams, M. T.; Wheeler, J. C.; Ward, M.; Wren, W. R.; Schmidt, B. P.

    1995-12-01

    We report on a recently initiated supernova (SN) search program using the McDonald Observatory 0.76m telescope and Prime Focus Camera (PFC). This SN search program takes advantage of the PFC's 42.6 x 42.6 arcmin FOV to survey moderate redshift Abell clusters in single Kron-Cousins R-band images. Our scientific goal is to discover and provide quality BVRI photometric follow-up, to R \\ +21, for a significant SNe sample at 0.03 group (Perlmutter et al 1995, ApJ, 440, L41), and the High Redshift SN Search Team (Schmidt et al 1995, Aiguiblava NATO ASI Proceedings). The McDonald SN search program includes a sample of the Abell clusters used by Lauer and Postman (1994, ApJ, 425, 418) to analyze Local Group motion. SNe discovered in these clusters contribute to the resolution of the Local Group motion controversy. We present an overview of the McDonald Observatory supernova search program, and discuss recent results.

  16. Developing models of how cognitive improvements change functioning: Mediation, moderation and moderated mediation

    Science.gov (United States)

    Wykes, Til; Reeder, Clare; Huddy, Vyv; Taylor, Rumina; Wood, Helen; Ghirasim, Natalia; Kontis, Dimitrios; Landau, Sabine

    2012-01-01

    Background Cognitive remediation (CRT) affects functioning but the extent and type of cognitive improvements necessary are unknown. Aim To develop and test models of how cognitive improvement transfers to work behaviour using the data from a current service. Method Participants (N49) with a support worker and a paid or voluntary job were offered CRT in a Phase 2 single group design with three assessments: baseline, post therapy and follow-up. Working memory, cognitive flexibility, planning and work outcomes were assessed. Results Three models were tested (mediation — cognitive improvements drive functioning improvement; moderation — post treatment cognitive level affects the impact of CRT on functioning; moderated mediation — cognition drives functioning improvements only after a certain level is achieved). There was evidence of mediation (planning improvement associated with improved work quality). There was no evidence that cognitive flexibility (total Wisconsin Card Sorting Test errors) and working memory (Wechsler Adult Intelligence Scale III digit span) mediated work functioning despite significant effects. There was some evidence of moderated mediation for planning improvement if participants had poorer memory and/or made fewer WCST errors. The total CRT effect on work quality was d = 0.55, but the indirect (planning-mediated CRT effect) was d = 0.082 Conclusion Planning improvements led to better work quality but only accounted for a small proportion of the total effect on work outcome. Other specific and non-specific effects of CRT and the work programme are likely to account for some of the remaining effect. This is the first time complex models have been tested and future Phase 3 studies need to further test mediation and moderated mediation models. PMID:22503640

  17. Everything in Moderation: Moderate Use of Screens Unassociated with Child Behavior Problems.

    Science.gov (United States)

    Ferguson, Christopher J

    2017-12-01

    The impact of children's use of "screen" media including television and computer games, continues to be debated. The American Academy of Pediatrics (AAP) until recently recommended a relatively restrictive screen time diet of 2 h or less for most youth. A representative correlational sample of youth were assessed for links between screen time and risky behavioral outcomes. Data collection occurred in 2013 conducted by the State of Florida. Use of screens that was moderately high, in excess of the AAP's former recommendations, but not excessive (1 SD or higher than average), was not associated with delinquency, risky behaviors, sexual behaviors, substance abuse, reduced grades or mental health problems. Even excessive screen use (1 SD or higher) was only weakly associated with negative outcomes related to delinquency, grades and depression only, and at levels unlikely to be practically significant. Results conceptually replicate those of Przybylski (2014) with a US sample for depression and delinquency as outcomes. Moderate use of screens, though in excess of the AAP's historical recommendations, are unassociated with problem outcomes. Excessive use of screens is only weakly associated with negative outcomes, and only those related to depression and delinquency as well as reduced grades, but not risky driving, substance use, risky sex or disordered eating. Although an "everything in moderation" message when discussing screen time with parents may be most productive, results do not support a strong focus on screen time as a preventative measure for youth problem behaviors.

  18. Auditory feedback improves heart rate moderation during moderate-intensity exercise.

    Science.gov (United States)

    Shaykevich, Alex; Grove, J Robert; Jackson, Ben; Landers, Grant J; Dimmock, James

    2015-05-01

    The objective of this study is to determine whether exposure to automated HR feedback can produce improvements in the ability to regulate HR during moderate-intensity exercise and to evaluate the persistence of these improvements after feedback is removed. Twenty healthy adults performed 10 indoor exercise sessions on cycle ergometers over 5 wk after a twice-weekly schedule. During these sessions (FB), participants received auditory feedback designed to maintain HR within a personalized, moderate-intensity training zone between 70% and 80% of estimated maximum HR. All feedback was delivered via a custom mobile software application. Participants underwent an initial assessment (PREFB) to measure their ability to maintain exercise intensity defined by the training zone without use of feedback. After completing the feedback training, participants performed three additional assessments identical to PREFB at 1 wk (POST1), 2 wk (POST2), and 4 wk (POST3) after their last feedback session. Time in zone (TIZ), defined as the ratio of the time spent within the training zone divided by the overall time of exercise, rate of perceived exertion, instrumental attitudes, and affective attitudes were then evaluated to assess results using two-way, mixed-model ANOVA with sessions and gender as factors. Training with feedback significantly improved TIZ (P moderate-intensity exercise in healthy adults.

  19. Neutron Dose Measurement Using a Cubic Moderator

    International Nuclear Information System (INIS)

    Sheinfeld, M.; Mazor, T.; Cohen, Y.; Kadmon, Y.; Orion, I.

    2014-01-01

    The Bonner Sphere Spectrometer (BSS), introduced In July 1960 by a research group from Rice University, Texas, is a major approach to neutron spectrum estimation. The BSS, also known as multi-sphere spectrometer, consists of a set of a different diameters polyethylene spheres, carrying a small LiI(Eu) scintillator in their center. What makes this spectrometry method such widely used, is its almost isotropic response, covering an extraordinary wide range of energies, from thermal up to even hundreds of MeVs. One of the most interesting and useful consequences of the above study is the 12'' sphere characteristics, as it turned out that the response curve of its energy dependence, have a similar shape compared with the neutron's dose equivalent as a function of energy. This inexplicable and happy circumstance makes it virtually the only monitoring device capable providing realistic neutron dose estimates over such a wide energy range. However, since the detection mechanism is not strictly related to radiation dose, one can expect substantial errors when applied to widely different source conditions. Although the original design of the BSS included a small 4mmx4mmO 6LiI(Eu) scintillator, other thermal neutron detectors has been used over the years: track detectors, activation foils, BF3 filled proportional counters, etc. In this study we chose a Boron loaded scintillator, EJ-254, as the thermal neutron detector. The neutron capture reaction on the boron has a Q value of 2.78 MeV of which 2.34 MeV is shared by the alpha and lithium particles. The high manufacturing costs, the encasement issue, the installation efficiency and the fabrication complexity, led us to the idea of replacing the sphere with a cubic moderator. This article describes the considerations, as well as the Monte-Carlo simulations done in order to examine the applicability of this idea

  20. Issues in Moderation of National Curriculum Assessment at Key Stage 3.

    Science.gov (United States)

    Cowling, Les

    1994-01-01

    Highlights the issues of moderation of teacher judgments for accountability and moderation for achieving consistent assessments. Discusses the meaning of moderation, the need for moderating teacher judgments, approaches to moderation, methods of moderation, and most appropriate methods of moderation at Key Stage 3. Presents an approach to…

  1. Optimization of moderators and beam extraction at the ESS

    DEFF Research Database (Denmark)

    Holst Andersen, Ken; Bertelsen, Mads; Zanini, Luca

    2018-01-01

    A global approach coupling the moderator to the beam extraction system has been applied for the design optimization of the thermal and cold moderators of the European Spallation Source (ESS), which will be the brightest neutron source in the world for condensed-matter studies. The design is based...... on the recently developed high-brightness low-dimensional moderator concepts. Para-hydrogen is used for the cold neutron source, while thermal neutrons are provided by moderation in water. The overall moderation configuration was chosen in order to satisfy a range of requirements on bispectral extraction......, beamport configuration and instrument performance. All instruments are served by a single moderator assembly above the target, arranged in a `butterfly' geometry with a height of 3cm. This was determined to be the optimal height for trade-off between high brightness and efficient guide illumination...

  2. Moderator purification and design modifications based on operation feedback

    Energy Technology Data Exchange (ETDEWEB)

    Das, S; Chakrabarti, A K; Shirolkar, K M; Sharma, V K [Nuclear Power Corporation, Bhabha Atomic Research Centre, Mumbai (India)

    1994-06-01

    Heavy water is used as a moderator in the Pressurized Heavy Water Reactors using natural uranium as a fissile fuel. The purification system is provided to maintain the purity of moderator heavy water so as to minimise the radiolytic decomposition of heavy water due to nuclear radiation which otherwise would lead to hazardous concentration of deuterium in the moderator cover gas. The presence of dissolved impurity in the moderator increases the radiolysis rate by impeding the reverse reaction and hence these must be removed. The purification system in general controls the chemistry of moderator by minimizing the corrosion of piping in the circuit and along with the liquid poison injection system adjusts the concentration of the poisons in the moderator. This paper describes the evolution of the purification system for the 500 MWe PHWRs based on various operating requirements and feedback from the operating stations. (author). 2 refs., 3 figs., 1 tab.

  3. Moderator purification and design modifications based on operation feedback

    International Nuclear Information System (INIS)

    Das, S.; Chakrabarti, A.K.; Shirolkar, K.M.; Sharma, V.K.

    1994-01-01

    Heavy water is used as a moderator in the Pressurized Heavy Water Reactors using natural uranium as a fissile fuel. The purification system is provided to maintain the purity of moderator heavy water so as to minimise the radiolytic decomposition of heavy water due to nuclear radiation which otherwise would lead to hazardous concentration of deuterium in the moderator cover gas. The presence of dissolved impurity in the moderator increases the radiolysis rate by impeding the reverse reaction and hence these must be removed. The purification system in general controls the chemistry of moderator by minimizing the corrosion of piping in the circuit and along with the liquid poison injection system adjusts the concentration of the poisons in the moderator. This paper describes the evolution of the purification system for the 500 MWe PHWRs based on various operating requirements and feedback from the operating stations. (author)

  4. Neutronic characteristics of coupled moderator proposed in integrated model

    International Nuclear Information System (INIS)

    Teshigawara, Makoto; Meigo, Shin-ichiro; Sakata, Hideaki; Kai, Tetsuya; Harada, Masahide; Ikeda, Yujiro; Watanabe, Noboru

    2001-05-01

    A pulsed spallation source for the materials science and the life science is currently developing for its construction in the High Intensity Proton Accelerator Project proposed jointly by the Japan Atomic Energy Research Institute (JAERI) and the High Energy Accelerator Research Organization (KEK). This report presents the analytical results of the neutronic characteristics of the coupled moderator based on the analytical results obtained by using an integrated model which has established on the extensive neutronic and technical study. Total heat deposition in a hydrogen (H 2 ) moderator working as the main moderator was about 420 W/MW. Maximum nuclear heat density in the H 2 moderator was about 1 W/cm 3 /MW. Also total heat deposition in a premoderator was about 9.2 kW/MW. The heat density of the premoderator was comparable to that of the moderator vessel made of aluminum alloy. The heat density of the premoderator and the moderator vessel is about 1.2-2 times higher than that of the hydrogen moderator. The temperature from 300 K to 400 K of the premoderator did not affect on neutron intensity of the H 2 moderator. This suggested an engineering advantage on the thermal and hydraulic design. 6000 or 7000 type of a aluminum alloy was considered from the viewpoint of the neutron beam transmission. The proton beams scattered by the proton beam window did not affect on the nuclear heating in the H 2 moderator. The heat deposition in the H 2 moderator and the neutron intensity of the H 2 moderator did not depend on the proton beam profile but it did on the distance between the proton beam and the moderator. (author)

  5. Reference moderator calculated performance for the LANSCE upgrade project

    International Nuclear Information System (INIS)

    Ferguson, P.D.; Russell, G.J.; Pitcher, E.J.

    1995-01-01

    The authors have calculated the performance of five moderators of interest to the LANSCE upgrade project. Coupled and decoupled light water and liquid hydrogen moderators in flux-trap geometry surrounded by a neutronically infinite heavy-water cooled beryllium reflector have been studied. Time and energy spectra, as well as semi-empirical fits to the data, are presented. The data has been made available to aid the instrument design and moderator selection process

  6. Developing a guiding protocol for the moderation of summative assessments.

    OpenAIRE

    McGuire, W.; Raaper, R.

    2016-01-01

    According to literature, assessment moderation is a process for assuring ‘valid, fair and reliable’ assessment outcomes but also consistency of applied marking criteria. While being an important area in assessment, moderation is often referred as an ‘under researched area of higher education’. The School of Education in the University of Glasgow, like many other academic units in the UK and internationally, adopts a range of approaches to moderating assessment within any one programme and acr...

  7. VARIABEL LATEN SEBAGAI MODERATOR DAN MEDIATOR DALAM HUBUNGAN KAUSAL

    OpenAIRE

    I KOMANG GEDE ANTARA; I PUTU EKA NILA KENCANA; KETUT JAYANEGARA

    2014-01-01

    Latent variables are variables that can not be measured directly. In analysis of causal relationship involving three latent variables, one latent variable can be a moderator or mediator variables. Goodness of Fit moderation and mediation model of latent variables is affected by the value of the canonical correlation between moderator/mediator latent variables with the independent latent variables and dependent latent variables. If the value of both canonical correlation is well , so the Good...

  8. Production And Characterization Of Tungsten-Based Positron Moderators

    International Nuclear Information System (INIS)

    Lucio, O. G. de; Morales, J. G.; Cruz-Manjarrez, H.

    2011-01-01

    Experiments of interest in Atomic Physics require production of well-defined low-energy positron beams through a moderation process of high-energy positrons, which can be produced by either the use of a radioactive source or by accelerator based pair production process. Tungsten is one of the most commonly used moderator materials because of its reasonable efficiency, high work function and relatively low cost. In this work we present different methods to produce tungsten-based candidate moderators in a variety of shapes. We also present results from characterizing these candidate moderators by ion beam analysis and microscopy techniques.

  9. Assessment of ACR moderator circulation design using CFD

    International Nuclear Information System (INIS)

    Bunama, R.; Carlucci, L.N.; Waddington, G.M.

    2004-01-01

    Assessment of the thermalhydraulic performance of the moderator circulation system for the Advanced CANDU Reactor (ACR) was carried out using the specialized Computational Fluid Dynamics (CFD) code MODTURC C LAS V2.9 IST. The assessment included modeling the moderator circulation inside the calandria vessel under nominal and isothermal flow conditions. The modeling results show that the moderator flow through the core is relatively uniform and mostly upward. The moderator temperature distribution is nearly stratified and increases monotonically from the bottom to the top of the calandria vessel. (author)

  10. VARIABEL LATEN SEBAGAI MODERATOR DAN MEDIATOR DALAM HUBUNGAN KAUSAL

    Directory of Open Access Journals (Sweden)

    I KOMANG GEDE ANTARA

    2014-01-01

    Full Text Available Latent variables are variables that can not be measured directly. In analysis of causal relationship involving three latent variables, one latent variable can be a moderator or mediator variables. Goodness of Fit moderation and mediation model of latent variables is affected by the value of the canonical correlation between moderator/mediator latent variables with the independent latent variables and dependent latent variables. If the value of both canonical correlation is well , so the Goodness of Fit models of mediation is getting better, while the opposite Goodness of Fit models will be better moderation.

  11. VARIABEL LATEN SEBAGAI MODERATOR DAN MEDIATOR DALAM HUBUNGAN KAUSAL

    Directory of Open Access Journals (Sweden)

    I KOMANG GEDE ANTARA

    2013-11-01

    Full Text Available Latent variables are variables that can not be measured directly. In analysis of causal relationship involving three latent variables, one latent variable can be a moderator or mediator variables. Goodness of Fit moderation and mediation model of latent variables is affected by the value of the canonical correlation between moderator/mediator latent variables with the independent latent variables and dependent latent variables. If the value of both canonical correlation is well , so the Goodness of Fit models of mediation is getting better, while the opposite Goodness of Fit models will be better moderation.

  12. Research on the Moderate Scale Operation of Food

    Institute of Scientific and Technical Information of China (English)

    Junying; WEI; Qing; YU

    2015-01-01

    Ensuring food security has always been an important and enduring strategic project. However,the contradiction between a large population and little land,the shortcomings of the household contract responsibility system and the current rapid development of industrialization and urbanization,make problems concerning farming increasingly prominent. To build a new agriculture business entity,the development of agricultural moderate scale operation is imperative. Based on this,this paper analyzes the insecure moderate scale of food and the impact of moderate scale operation of food,and puts forth recommendations for promoting moderate scale operation of food.

  13. Effect of moderate exercise on peritoneal neutrophils from juvenile rats.

    Science.gov (United States)

    Braz, Glauber Ruda; Ferreira, Diorginis Soares; Pedroza, Anderson Apolonio; da Silva, Aline Isabel; Sousa, Shirley Maria; Pithon-Curi, Tania Cristina; Lagranha, Claudia

    2015-09-01

    Previous studies showed that moderate exercise in adult rats enhances neutrophil function, although no studies were performed in juvenile rats. We evaluated the effects of moderate exercise on the neutrophil function in juvenile rats. Viability and neutrophils function were evaluated. Moderate exercise did not impair the viability and mitochondrial transmembrane potential of neutrophils, whereas there was greater reactive oxygen species production (164%; p < 0.001) and phagocytic capacity (29%; p < 0.05). Our results suggest that moderate exercise in juvenile rats improves neutrophil function, similar to adults.

  14. Testing overall and moderator effects meta-regression

    NARCIS (Netherlands)

    Huizenga, H.M.; Visser, I.; Dolan, C.V.

    2011-01-01

    Random effects meta-regression is a technique to synthesize results of multiple studies. It allows for a test of an overall effect, as well as for tests of effects of study characteristics, that is, (discrete or continuous) moderator effects. We describe various procedures to test moderator effects:

  15. A combined matrix isolation spectroscopy and cryosolid positron moderation apparatus

    Energy Technology Data Exchange (ETDEWEB)

    Molek, Christopher D.; Michael Lindsay, C.; Fajardo, Mario E. [Air Force Research Laboratory, Munitions Directorate, Ordnance Division, Energetic Materials Branch, AFRL/RWME, 2306 Perimeter Road, Eglin AFB, Florida 32542-5910 (United States)

    2013-03-15

    We describe the design, construction, and operation of a novel apparatus for investigating efficiency improvements in thin-film cryogenic solid positron moderators. We report results from solid neon, argon, krypton, and xenon positron moderators which illustrate the capabilities and limitations of our apparatus. We integrate a matrix isolation spectroscopy diagnostic within a reflection-geometry positron moderation system. We report the optical thickness, impurity content, and impurity trapping site structures within our moderators determined from infrared absorption spectra. We use a retarding potential analyzer to modulate the flow of slow positrons, and report positron currents vs. retarding potential for the different moderators. We identify vacuum ultraviolet emissions from irradiated Ne moderators as the source of spurious signals in our channel electron multiplier slow positron detection channel. Our design is also unusual in that it employs a sealed radioactive Na-22 positron source which can be translated relative to, and isolated from, the cryogenic moderator deposition substrate. This allows us to separate the influences on moderator efficiency of surface contamination by residual gases from those of accumulated radiation damage.

  16. Assessment Moderation in an Australian Context: Processes, Practices, and Challenges

    Science.gov (United States)

    Beutel, Denise; Adie, Lenore; Lloyd, Margaret

    2017-01-01

    Moderation is a quality assurance process that plays a central role in the teaching, learning, and assessment cycle in higher education. While there is a growing body of research globally on teaching, learning, and, to a lesser degree, assessment in higher education, the process of moderation of assessment has received even less attention. In a…

  17. Performativity, Fabrication and Trust: Exploring Computer-Mediated Moderation

    Science.gov (United States)

    Clapham, Andrew

    2013-01-01

    Based on research conducted in an English secondary school, this paper explores computer-mediated moderation as a performative tool. The Module Assessment Meeting (MAM) was the moderation approach under investigation. I mobilise ethnographic data generated by a key informant, and triangulated with that from other actors in the setting, in order to…

  18. Multi-Disciplinary Peer-Mark Moderation of Group Work

    Science.gov (United States)

    Willmot, Peter; Pond, Keith

    2012-01-01

    Self and peer assessment offers benefits for enhancing student learning. Peer moderation provides a convenient solution for awarding individual marks in group assignments. This paper provides a significant review of peer-mark moderation, and describes an award winning, web-based tool that was developed in the UK and is now spreading across the…

  19. Towards a moderated mediation model of innovative work behaviour enhancement

    NARCIS (Netherlands)

    Stoffers, Jol M.; van der Heijden, Beatrice; Notelaers, Guy L.A.

    2014-01-01

    Purpose – The purpose of this paper is to investigate a moderated mediation model of innovative work behaviour enhancement. Perceived firm (organizational and market) performance was assumed to moderate the relationships between leader-member exchange (LMX) and organizational citizenship behaviour

  20. Solid methane cold moderator for the IBR-2 reactor

    International Nuclear Information System (INIS)

    Beliakov, A. A.; Tretiakov, I. T.; Shabalin, E. P.; Golikov, V. V.; Luschivkov, V I.

    1997-09-01

    The paper describes the research and design work carried out since 1986 at the Frank Laboratory of Neutron Physics of the Joint Institute for Nuclear Research in Dubna to create a cryogenic moderator for the IBR-22 reactor using solid methane as a moderating substance.

  1. Moderate deviations principles for the kernel estimator of ...

    African Journals Online (AJOL)

    Abstract. The aim of this paper is to provide pointwise and uniform moderate deviations principles for the kernel estimator of a nonrandom regression function. Moreover, we give an application of these moderate deviations principles to the construction of condence regions for the regression function. Resume. L'objectif de ...

  2. A discourse on moderation as a philosophical concept | Airoboman ...

    African Journals Online (AJOL)

    This work is a contemporary attempt to revivify interest in the ancient philosophical concept of moderation. It attempts a conceptual analysis of the concept of moderation as virtue. It examined this concept hand in hand with sensual desire and holds that appetites and passions need not be eradicated completely, but instead, ...

  3. Moderators and mediators of treatments for youth with ADHD

    NARCIS (Netherlands)

    van der Oord, S.; Daley, D.; Maric, M.; Prins, P.J.M.; Ollendick, T.H.

    2015-01-01

    There are few studies assessing moderation and mediation of behavioral treatment and cognitive training outcome in children with ADHD. Only two studies have assessed moderation of treatment outcome. For behavioral treatment outcome, comorbid anxiety, parental self-efficacy, paternal ADHD, and no or

  4. Dispositional and Situational Autonomy as Moderators of Mood and Creativity

    Science.gov (United States)

    Xiao, Fengqiu; Wang, Ling; Chen, Yinghe; Zheng, Zhiwei; Chen, Wenjun

    2015-01-01

    Although previous research suggests that mood can influence creativity, the controversy about the effects of positive and negative moods has raged for years. This study investigated how the relationship between induced mood and creativity is moderated by dispositional and situational autonomy. It contrasted the different moderating effects of the…

  5. Psychopathic Traits Moderate Peer Influence on Adolescent Delinquency

    Science.gov (United States)

    Kerr, Margaret; Van Zalk, Maarten; Stattin, Hakan

    2012-01-01

    Background: Peer influence on adolescent delinquency is well established, but little is known about moderators of peer influence. In this study, we examined adolescents' (targets) and their peers' psychopathic personality traits as moderators of peer influence on delinquency in peer networks. We used three separate dimensions of the psychopathic…

  6. Moderate Muslims and Islamist Terrorism: Between Denial and Resistance

    Directory of Open Access Journals (Sweden)

    Alex P. Schmid

    2017-08-01

    Full Text Available Since President Trump attempted to ban Muslims from certain countries from entering the United States, the question which Muslims are ‘moderate Muslims’ and which are potential ‘radical Islamist terrorists’ has gained new relevance. While some Muslim leaders deny any connection between their religion and terrorism, it is undeniable that many terrorists claim to act in the name of Islam. This Research Paper first seeks to determine where the world’s 1.6 billion Muslims stand in relation to terrorism, distinguishing between Jihadist Muslims, Islamist Muslims, Conservative Muslims and Pluralist Muslims. It then looks at which criteria would allow us to distinguish between ‘moderates’ and other Muslims. Subsequently, the focus is on the role of moderation in Islam itself, whereby attention is given to the Global Movement of Moderates which originated in Malaysia. While some leading Muslim scholars stress that moderation is a central value in Islam, many Muslims nevertheless do not like to be called ‘moderates’ for fear of being seen as pro-Western. A further section of this Research Paper looks at how Islamist extremists view moderate Muslims. This is followed by a section that focuses on moderate Muslims voicing their opposition to Islamist terrorism – something often overlooked by Western media. The concluding section raises the thorny question whether moderation is rooted in Islam itself or comes from outside and the author pleads for humanism to be the middle ground for moderates of all faiths and political persuasions.

  7. Moderate alcohol consumption increases cholesterol efflux mediated by ABCA1

    NARCIS (Netherlands)

    Beulens, J.W.J.; Sierksma, A.; Tol, A. van; Fournier, N.; Gent, T. van; Paul, J.L.; Hendriks, H.F.J.

    2004-01-01

    Moderate alcohol consumption increases HDL cholesterol, which is involved in reverse cholesterol transport (RCT). The aim of this study was to investigate the effect of moderate alcohol consumption on cholesterol efflux, using J774 mouse macrophages and Fu5AH cells, and on other parameters in the

  8. Landscape moderation of biodiversity patterns and processes - eight hypotheses.

    Science.gov (United States)

    Tscharntke, Teja; Tylianakis, Jason M; Rand, Tatyana A; Didham, Raphael K; Fahrig, Lenore; Batáry, Péter; Bengtsson, Janne; Clough, Yann; Crist, Thomas O; Dormann, Carsten F; Ewers, Robert M; Fründ, Jochen; Holt, Robert D; Holzschuh, Andrea; Klein, Alexandra M; Kleijn, David; Kremen, Claire; Landis, Doug A; Laurance, William; Lindenmayer, David; Scherber, Christoph; Sodhi, Navjot; Steffan-Dewenter, Ingolf; Thies, Carsten; van der Putten, Wim H; Westphal, Catrin

    2012-08-01

    Understanding how landscape characteristics affect biodiversity patterns and ecological processes at local and landscape scales is critical for mitigating effects of global environmental change. In this review, we use knowledge gained from human-modified landscapes to suggest eight hypotheses, which we hope will encourage more systematic research on the role of landscape composition and configuration in determining the structure of ecological communities, ecosystem functioning and services. We organize the eight hypotheses under four overarching themes. Section A: 'landscape moderation of biodiversity patterns' includes (1) the landscape species pool hypothesis-the size of the landscape-wide species pool moderates local (alpha) biodiversity, and (2) the dominance of beta diversity hypothesis-landscape-moderated dissimilarity of local communities determines landscape-wide biodiversity and overrides negative local effects of habitat fragmentation on biodiversity. Section B: 'landscape moderation of population dynamics' includes (3) the cross-habitat spillover hypothesis-landscape-moderated spillover of energy, resources and organisms across habitats, including between managed and natural ecosystems, influences landscape-wide community structure and associated processes and (4) the landscape-moderated concentration and dilution hypothesis-spatial and temporal changes in landscape composition can cause transient concentration or dilution of populations with functional consequences. Section C: 'landscape moderation of functional trait selection' includes (5) the landscape-moderated functional trait selection hypothesis-landscape moderation of species trait selection shapes the functional role and trajectory of community assembly, and (6) the landscape-moderated insurance hypothesis-landscape complexity provides spatial and temporal insurance, i.e. high resilience and stability of ecological processes in changing environments. Section D: 'landscape constraints on

  9. Coupled hydrogen moderator optimization with ortho/para hydrogen ratio

    International Nuclear Information System (INIS)

    Kai, Tetsuya; Harada, Masahide; Teshigawara, Makoto; Watanabe, Noboru; Ikeda, Yujiro

    2004-01-01

    Neutronic performance of a coupled hydrogen moderator was studied as a function of para hydrogen concentration, moderator thickness and height, premoderator thickness, etc. for the J-PARC spallation neutron source. It was found that a thick (140 mm) moderator with 100% para-hydrogen was optimal to provide a high time- and energy-integrated neutron intensity below 15 meV and high pulse-peak intensities at lower energies. Distribution of the cold neutrons on a moderator viewed surface was studied and found to exhibit an intensity-enhanced region at the fringe part near the premoderator. This rather peculiar distribution suggested that the moderator and the viewed surface must be designed so as to take the full advantage of the brighter region near the premoderator

  10. The effectivty of hydrogeneous moderators in pulsed sources

    International Nuclear Information System (INIS)

    Rief, H.; Hartman, J.

    1975-01-01

    Guide lines are provided for an evaluation of the potential of pulsed reactors. In the SORA reactor, neutrons emitted from the fast core are converted in hydrogeneous moderators to beams of low energy neutrons for time of flight experiments. The important characteristics of the neutron sources are absolute intensity of the neutron beam and its energy and time distribution. The problem is solved mathematcially by the random walk (Monte Carlo) method. Calculational methods which are described are compared with pulsed moderator measurements. The choice of moderators and criteria of optimization are discussed. Particular examples of realistic moderator design as planned for SOYA, and as they will be used in pulsed reactors, are analysed, a distinction being made between thermal, cold, and hot moderators. Finally flux estimates are compared with those obtained for a spallation target. (U.K.)

  11. Frontal EEG asymmetry as a moderator and mediator of emotion.

    Science.gov (United States)

    Coan, James A; Allen, John J B

    2004-10-01

    Frontal EEG asymmetry appears to serve as (1) an individual difference variable related to emotional responding and emotional disorders, and (2) a state-dependent concomitant of emotional responding. Such findings, highlighted in this review, suggest that frontal EEG asymmetry may serve as both a moderator and a mediator of emotion- and motivation-related constructs. Unequivocal evidence supporting frontal EEG asymmetry as a moderator and/or mediator of emotion is lacking, as insufficient attention has been given to analyzing the frontal EEG asymmetries in terms of moderators and mediators. The present report reviews the frontal EEG asymmetry literature from the framework of moderators and mediators, and overviews data analytic strategies that would support claims of moderation and mediation.

  12. Demonstration and evaluation of a method for assessing mediated moderation.

    Science.gov (United States)

    Morgan-Lopez, Antonio A; MacKinnon, David P

    2006-02-01

    Mediated moderation occurs when the interaction between two variables affects a mediator, which then affects a dependent variable. In this article, we describe the mediated moderation model and evaluate it with a statistical simulation using an adaptation of product-of-coefficients methods to assess mediation. We also demonstrate the use of this method with a substantive example from the adolescent tobacco literature. In the simulation, relative bias (RB) in point estimates and standard errors did not exceed problematic levels of +/- 10% although systematic variability in RB was accounted for by parameter size, sample size, and nonzero direct effects. Power to detect mediated moderation effects appears to be severely compromised under one particular combination of conditions: when the component variables that make up the interaction terms are correlated and partial mediated moderation exists. Implications for the estimation of mediated moderation effects in experimental and nonexperimental research are discussed.

  13. Moderators of Implicit-Explicit Exercise Cognition Concordance.

    Science.gov (United States)

    Berry, Tanya R; Rodgers, Wendy M; Markland, David; Hall, Craig R

    2016-12-01

    Investigating implicit-explicit concordance can aid in understanding underlying mechanisms and possible intervention effects. This research examined the concordance between implicit associations of exercise with health or appearance and related explicit motives. Variables considered as possible moderators were behavioral regulations, explicit attitudes, and social desirability. Participants (N = 454) completed measures of implicit associations of exercise with health and appearance and questionnaire measures of health and appearance motives, attitudes, social desirability, and behavioral regulations. Attitudes significantly moderated the relationship between implicit associations of exercise with health and health motives. Identified regulations significantly moderated implicit-explicit concordance with respect to associations with appearance. These results suggest that implicit and explicit exercise-related cognitions are not necessarily independent and their relationship to each other may be moderated by attitudes or some forms of behavioral regulation. Future research that takes a dual-processing approach to exercise behavior should consider potential theoretical moderators of concordance.

  14. Validation of moderator-level reactivity coefficient using station data

    Energy Technology Data Exchange (ETDEWEB)

    Younis, M.; Martchouk, I., E-mail: mohamed.younis@amecfw.com, E-mail: iouri.martchouk@amecfw.com [Amec Foster Wheeler, Toronto, ON (Canada); Buchan, P.D., E-mail: david.buchan@opg.com [Ontario Power Generation, Pickering, ON (Canada)

    2015-07-01

    The reactivity effect due to variations in the moderator level has been recognized as a reactor physics phenomenon of importance during normal operation and accident analysis. The moderator-level reactivity coefficient is an important parameter in safety analysis of CANDU reactors, e.g., during Loss of Moderator Heat Sink as well as in the simulation of Reactor Regulating System action in CANDU reactors that use moderator level for reactivity control. This paper presents the results of the validation exercise of the reactor-physics toolset using the measurements performed in Pickering Unit 4 in 2003. The capability of the code suite of predicting moderator-level reactivity effect was tested by comparing measured and predicted reactor-physics parameters. (author)

  15. Performance tests of external moderators of a PGNAA setup

    International Nuclear Information System (INIS)

    Naqvi, A.A.; Fazal-ur-Rehman,; Al-Jarallah, M.I.; Abu-Jarad, F.; Maslehuddin, M.

    2003-01-01

    Performance tests of external cylindrical moderators of an accelerator-based prompt gamma ray neutron activation analysis (PGNAA) setup have been carried out through thermal neutrons and prompt γ-ray yield measurements. The PGNAA setup is to be used for analysis of cement samples. This study was conducted to investigate the effects of geometry of cylindrical moderator on yield of thermal neutrons and prompt γ-rays for two different types of moderator assemblies. One of the moderators was to be used with a small sample and the other to be used with a large sample. Fast and thermal neutron yield was measured inside the sample volume as a function of the front moderator thickness as well as sample length. Neutron yield measurement was carried out at the King Fahd University of Petroleum and Minerals 350 keV pulsed beam accelerator using nuclear track detectors. The pulsed 200 keV deuteron beam with 5 ns pulse width and 31.25 kHz frequency was used to produce 2.8 MeV neutrons via D(d,n) reaction. Neutron yield measurements showed that the large sample moderator has a smaller yield of thermal neutrons as compared to the small sample moderator, which is in complete agreement with the results of Monte Carlo yield calculations of the thermal and fast neutrons from both the moderators. Finally, the prompt γ-ray yield from a Portland cement sample was measured using the two moderators and was compared with each other. As predicted by Monte Carlo simulations, in spite of a smaller yield of thermal neutrons, the large sample moderator has a higher yield of prompt γ-rays

  16. Moderator behaviour and reactor internals integrity at Atucha I NPP

    International Nuclear Information System (INIS)

    Berra, S.; Guala, M.; Herzovich, P.; Chocron, M.; Lorenzo, A.; Raffo Calderon, Ma. C. del; Urrutia, G.

    1996-01-01

    Atucha I is a Pressure Vessel Heavy Water Cooled Heavy Water Moderator Reactor. In this kind of reactor the moderator tank is physically connected to the primary coolant. Since neutron economy requires the moderator to be as cold as possible, it is necessary that even when physically connected, it should have a separated cooling system, which in this case is also used as a feed-water preheater, and also heat mass transfer with primary coolant should be minimized. This condition requires that some reactor internals are designed in principle to last the whole life of the plant. However, in 1988 the failure of one internal produced a 16 month shut down. This incident could have been prevented but the idea that reactor internals would not have failures due to aging was dominant at that time avoiding the early detection of the failure. However, the analysis of the records after the incident showed that some process variables had changed previously to the incident, i.e., power exchanged at the moderator heat exchanger had increased. Since the station restart up some changes in the moderator process variables and a flow rate reduction of about 10% through the primary side of one moderator cooler were observed. In order to understand the flow reduction and the overall behaviour of moderators parameters, two models were developed that predict moderator and moderator cooler behavior under the new conditions. The present paper refers to these models, which together with the improvement of process variables measurements mentioned in another paper presented at this meeting permits to understand current moderator behaviour and helps to early diagnostic of an eventual reactor internal failure. (author). 2 refs, 4 figs, 1 tab

  17. Performance tests of external moderators of a PGNAA setup

    Energy Technology Data Exchange (ETDEWEB)

    Naqvi, A.A. E-mail: aanaqvi@kfupm.edu.sa; Fazal-ur-Rehman,; Al-Jarallah, M.I.; Abu-Jarad, F.; Maslehuddin, M

    2003-01-01

    Performance tests of external cylindrical moderators of an accelerator-based prompt gamma ray neutron activation analysis (PGNAA) setup have been carried out through thermal neutrons and prompt {gamma}-ray yield measurements. The PGNAA setup is to be used for analysis of cement samples. This study was conducted to investigate the effects of geometry of cylindrical moderator on yield of thermal neutrons and prompt {gamma}-rays for two different types of moderator assemblies. One of the moderators was to be used with a small sample and the other to be used with a large sample. Fast and thermal neutron yield was measured inside the sample volume as a function of the front moderator thickness as well as sample length. Neutron yield measurement was carried out at the King Fahd University of Petroleum and Minerals 350 keV pulsed beam accelerator using nuclear track detectors. The pulsed 200 keV deuteron beam with 5 ns pulse width and 31.25 kHz frequency was used to produce 2.8 MeV neutrons via D(d,n) reaction. Neutron yield measurements showed that the large sample moderator has a smaller yield of thermal neutrons as compared to the small sample moderator, which is in complete agreement with the results of Monte Carlo yield calculations of the thermal and fast neutrons from both the moderators. Finally, the prompt {gamma}-ray yield from a Portland cement sample was measured using the two moderators and was compared with each other. As predicted by Monte Carlo simulations, in spite of a smaller yield of thermal neutrons, the large sample moderator has a higher yield of prompt {gamma}-rays.

  18. Moderator behaviour and reactor internals integrity at Atucha I NPP

    Energy Technology Data Exchange (ETDEWEB)

    Berra, S; Guala, M; Herzovich, P [Central Nuclear Atucha I, Nucleoelectrica Argentina, Lima, Buenos Aires (Argentina); Chocron, M; Lorenzo, A; Raffo Calderon, Ma. C. del; Urrutia, G [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Centro Atomico Constituyentes

    1997-12-31

    Atucha I is a Pressure Vessel Heavy Water Cooled Heavy Water Moderator Reactor. In this kind of reactor the moderator tank is physically connected to the primary coolant. Since neutron economy requires the moderator to be as cold as possible, it is necessary that even when physically connected, it should have a separated cooling system, which in this case is also used as a feed-water preheater, and also heat mass transfer with primary coolant should be minimized. This condition requires that some reactor internals are designed in principle to last the whole life of the plant. However, in 1988 the failure of one internal produced a 16 month shut down. This incident could have been prevented but the idea that reactor internals would not have failures due to aging was dominant at that time avoiding the early detection of the failure. However, the analysis of the records after the incident showed that some process variables had changed previously to the incident, i.e., power exchanged at the moderator heat exchanger had increased. Since the station restart up some changes in the moderator process variables and a flow rate reduction of about 10% through the primary side of one moderator cooler were observed. In order to understand the flow reduction and the overall behaviour of moderators parameters, two models were developed that predict moderator and moderator cooler behavior under the new conditions. The present paper refers to these models, which together with the improvement of process variables measurements mentioned in another paper presented at this meeting permits to understand current moderator behaviour and helps to early diagnostic of an eventual reactor internal failure. (author). 2 refs, 4 figs, 1 tab.

  19. Students' Perceptions of Online Discussions, Participation and E-Moderation Behaviours in Peer-Moderated Asynchronous Online Discussions

    Science.gov (United States)

    Ghadirian, Hajar; Fauzi Mohd Ayub, Ahmad; Salehi, Keyvan

    2018-01-01

    The aim of this study was to investigate the relationships between students' perceptions of online discussions, participation and e-moderation behaviours in peer-moderated asynchronous online discussions. Using survey data, the learning system's activity log and discussion transcripts, the authors analysed how 84 learners' perceptions of online…

  20. Acute Moderate Exercise Improves Mnemonic Discrimination in Young Adults

    Science.gov (United States)

    Suwabe, Kazuya; Hyodo, Kazuki; Byun, Kyeongho; Ochi, Genta; Yassa, Michael A.; Soya, Hideaki

    2018-01-01

    Increasing evidence suggests that regular moderate exercise increases neurogenesis in the dentate gyrus (DG) of the hippocampus and improves memory functions in both humans and animals. The DG is known to play a role in pattern separation, which is the ability to discriminate among similar experiences, a fundamental component of episodic memory. While long-term voluntary exercise improves pattern separation, there is little evidence of alterations in DG function after an acute exercise session. Our previous studies showing acute moderate exercise-enhanced DG activation in rats, and acute moderate exercise-enhanced prefrontal activation and executive function in humans, led us to postulate that acute moderate exercise may also activate the hippocampus, including more specifically the DG, thus improving pattern separation. We thus investigated the effects of a 10-min moderate exercise (50% V̇O2peak) session, the recommended intensity for health promotion, on mnemonic discrimination (a behavioral index of pattern separation) in young adults. An acute bout of moderate exercise improved mnemonic discrimination performance in high similarity lures. These results support our hypothesis that acute moderate exercise improves DG-mediated pattern separation in humans, proposing a useful human acute-exercise model for analyzing the neuronal substrate underlying acute and regular exercise-enhanced episodic memory based on the hippocampus. PMID:27997992

  1. Thermal-hydraulic experiments and analyses for cold moderators

    International Nuclear Information System (INIS)

    Aso, Tomokazu; Kaminaga, Masanori; Hino, Ryutaro

    2003-01-01

    Cold moderators using liquid hydrogen are one of the key components in a MW-scale target system working as a spallation neutron source. The cold moderators directly affect the neutronic performance both in intensity and resolution. Cold moderator vessels are designed to be flat and cylindrical type vessels, which are required to realize and uniform temperature distribution in the vessel to obtain better neutronic performance. Velocity distributions in the moderator vessels, affecting the temperature distributions, were measured by using moderator models under water flowing conditions. In the experiments, jet-induced flows such as recirculation flows and stagnant regions were observed. For the flat type moderator vessel, the analytical results of velocity distributions using a standard k-ε turbulence model agreed well with experimental results obtained with a PIV system. However, for the cylindrical type moderator vessel, especially predicted heat transfer coefficients on a bottom of the vessel were much lower than the experimental results, which gave conservative analytical result of temperature. (author)

  2. Moderation analysis with missing data in the predictors.

    Science.gov (United States)

    Zhang, Qian; Wang, Lijuan

    2017-12-01

    The most widely used statistical model for conducting moderation analysis is the moderated multiple regression (MMR) model. In MMR modeling, missing data could pose a challenge, mainly because the interaction term is a product of two or more variables and thus is a nonlinear function of the involved variables. In this study, we consider a simple MMR model, where the effect of the focal predictor X on the outcome Y is moderated by a moderator U. The primary interest is to find ways of estimating and testing the moderation effect with the existence of missing data in X. We mainly focus on cases when X is missing completely at random (MCAR) and missing at random (MAR). Three methods are compared: (a) Normal-distribution-based maximum likelihood estimation (NML); (b) Normal-distribution-based multiple imputation (NMI); and (c) Bayesian estimation (BE). Via simulations, we found that NML and NMI could lead to biased estimates of moderation effects under MAR missingness mechanism. The BE method outperformed NMI and NML for MMR modeling with missing data in the focal predictor, missingness depending on the moderator and/or auxiliary variables, and correctly specified distributions for the focal predictor. In addition, more robust BE methods are needed in terms of the distribution mis-specification problem of the focal predictor. An empirical example was used to illustrate the applications of the methods with a simple sensitivity analysis. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

  3. The Concept of Moderation Among Islamic Pious Predecessors

    Directory of Open Access Journals (Sweden)

    Shumsudin Yabi

    2014-12-01

    Full Text Available Islam is religion of simplicity, moderation, just and perfect that leads its followers to the rightful path. Moderation is an important aspect in our daily life. Prophet Muhammad praise be upon him (PBUH moderate lifestyle is a perfect exemplary. These exemplary has been adapted by previous Islamic scholars in their daily life thus they had emphasized the importance of understanding Al-Quran and Sunnah based on the understanding of previous pious predecessors. Some of the factors that had caused the digression are the diversion, misunderstanding and misinterpretation resulting to improper understanding of the concept on moderation. All these had caused misunderstanding and conflict of interests among us that had caused a disaster to the community. Results of the study found that the pious predecessors had drawn the concepts of moderations in five aspects of life. They are moderation in doing justice and goodness, doing pious deeds, in managing the economic and financial, in following the rightful path and finally moderation in leading our daily life following the exemplary of Prophet Muhammad PBUH.

  4. Measuring device for the temperature coefficient of reactor moderators

    International Nuclear Information System (INIS)

    Nakano, Yuzo.

    1987-01-01

    Purpose: To rapidly determine by automatic calculation the temperature coefficient for moderators which has been determined so far by a log of manual processings. Constitution: Each of signals from a control rod position indicator, a reactor reactivity, instrument and moderator temperature meter are inputted, and each of the signals and designed valued for the doppler temperature coefficients are stored. Recurling calculation is conducted based on the reactivity and the moderator temperature at an interval where the temperature changes of the moderators are equalized at an identical control rod position, to determine isothermic coefficient. Then, the temperature coefficient for moderator are calculated from the isothermic coefficient and the doppler temperature coefficient. The relationship between the reactivity and the moderator temperature is plotted on a X-Y recorder. The stored signals and the calculated temperature coefficient for moderators are sequentially displayed and the results are printed out when the measurement is completed. According to the present device, since the real time processing is conducted, the processing time can be shortened remarkably. Accordingly, it is possible to save the man power for the test of the nuclear reactor and improve the reactor operation performance. (Kamimura, M.)

  5. In-core LOCA (PTR) analysis with poisoned moderator

    International Nuclear Information System (INIS)

    Kim, S. R.; Kim, B. G.; Kim, T. M.; Choi, J. H.; Kim, Yun Ho; Choi, Hoon

    2005-01-01

    CANDU reactors have been analyzed and evaluated for the postulated in-core LOCA while the reactor is operating normally with low moderator poison concentration. However, when the reactor is operating with relatively large amounts of boron and/or gadolinium poisons in the moderator, the assessment for fuel integrity was required for pressure tube rupture (PTR) accident. The methodology of in-core LOCA analysis with poisoned moderator is developed to determine the effective trip parameters, evaluate the fuel integrity, and establish the standard reactor start-up model for CANDU reactor recently. The developed methodology and results are presented

  6. Moderation of antidepressant response by the serotonin transporter gene

    DEFF Research Database (Denmark)

    Huezo-Diaz, Patricia; Uher, Rudolf; Smith, Rebecca

    2009-01-01

    Background: There have been conflicting reports on whether the length polymorphism in the promoter of the serotonin transporter gene (5-HTTLPR) moderates the antidepressant effects of selective serotonin reuptake inhibitors (SSRIs). We hypothesised that the pharmacogenetic effect of 5-HTTLPR...... the serotonin transporter gene were genotyped in 795 adults with moderate-to-severe depression treated with escitalopram or nortriptyline in the Genome Based Therapeutic Drugs for Depression (GENDEP) project. Results: The 5-HTTLPR moderated the response to escitalopram, with long-allele carriers improving more...

  7. Moderator material for neutrons and use of said material

    International Nuclear Information System (INIS)

    Hiismaeki, P.; Auterinen, I.

    1994-01-01

    The invention concerns a moderator material used for mediation of high-velocity neutrons, in particular of fission neutrons, to epithermal neutrons. The principal components of the moderator material are aluminum fluoride and aluminum metal, which have been formed into a dense composite substantially free of pores, wherein the material contains 20-50 percent-vol. of aluminum metal and 80-50 percent-vol. aluminum fluoride. Further, the use of the moderator material in accordance with the invention in neutron capture therapy of cancer tumours is described, such as in boron neutron capture therapy (BNCT)

  8. Effects of various moderators on the critical mass of plutonium

    International Nuclear Information System (INIS)

    Doherty, A.L.

    1986-01-01

    The fissile material storage tanks in the Hanford Plutonium Critical Mass Laboratory (CML) in Richland, Washington, are presently being upgraded. During the design and planning phase of this modification, criticality analysis was necessary to compare potential moderator/absorber materials used as isolators between tanks. A parameter study was performed to assist in determining the appropriate moderator material to be used in the plutonium nitrate storage tank system in the mix room at the CML. Four moderator/absorber materials were identified as providing adequate isolation between the tanks

  9. Neutron moderation at very low temperatures (1691); Moderation des neutrons aux tres basses temperatures (1961)

    Energy Technology Data Exchange (ETDEWEB)

    Lacaze, A [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1961-04-15

    Starting from Harwell experiment carried out inside a low-power reactor, we intended to maintain a liquid hydrogen cell in a channel of the EL3 reactor (at Saclay) whose thermal neutrons flux is 10{sup 14} neutrons/cm{sup 2}/s. We tried to work out a device giving off an important beam of cold neutrons and able to operate in a way as automatic as possible during many consecutive day without a stop. Several circuits have already been achieved at very low temperatures but they brought out volumes and fluxes much lower than those we used this time. The difficulties we have met in carrying out such a device arose on the one hand from the very high energy release to which any kind of experiment is inevitably submitted when placed near the core of the reactor, on the other, hand from the very little room which is available in experimental channels of reactors. In such condition, it is necessary to use a moderator as effective as possible. This study is divided into three parts ; in the first part, we try to determine: a) conditions in which moderation takes place, hence the volume of the cell; b) materials likely to be used at low temperature and in pile; c) cooling system; hence we had to study fluid flow conditions at very low temperatures in very long ducts. The second part is devoted to the description of the device. The third part ventilates the results we have obtained. (author) [French] Partant de l'experience de Harwell faite dans une pile de faible puissance, nous nous sommes propose de maintenir une cellule d'hydrogene liquide dans un canal de la pile EL3 de Saclay dont le flux de neutrons thermiques est de 10{sup 14} neutrons par seconde et par cm{sup 2}. Nous avons cherche a realiser une installation donnant un faisceau de neutrons froids important, et pouvant fonctionner d'une maniere aussi automatique que possible, pendant des periodes de plusieurs jours sans arret. Plusieurs circuits aux tres basses temperatures ont deja ete realises, mais ils ne mettaient

  10. Moderator clean-up system in a heavy water reactor

    International Nuclear Information System (INIS)

    Sasada, Yasuhiro; Hamamura, Kenji.

    1983-01-01

    Purpose: To decrease the fluctuation of the poison concentration in heavy water moderator due to a heavy water clean-up system. Constitution: To a calandria tank filled with heavy water as poison-containing moderators, are connected both end of a pipeway through which heavy water flows and to which a clean-up device is provided. Strongly basic resin is filled within the clean-up device and a cooler is disposed to a pipeway at the upstream of the clean-up device. In this structure, the temperature of heavy water at the inlet of the clean-up device at a constant level between the temperature at the exit of the cooler and the lowest temperature for the moderator to thereby decrease the fluctuation in the poison concentration in the heavy water moderator due to the heavy water clean-up device. (Moriyama, K.)

  11. Advertising Spending, Firm Performance, and the Moderating Impact of CSR

    DEFF Research Database (Denmark)

    Assaf, A. George; Josiassen, Alexander; Ahn, Jin Sun

    2017-01-01

    This article investigates the potential of corporate social responsibility (CSR) to influence the link between advertising spending and firm performance. Drawing upon the literature of CSR, we hypothesize that CSR positively moderates the relationship between advertising spending and firm perform...

  12. Analysis of the moderating ratio in BWR fuels

    International Nuclear Information System (INIS)

    Gomez, A.; Xolocostli, V.; Alonso, G.

    2001-01-01

    In all different light water nuclear reactors is very important the fuel assembly design. It has to be designed to achieve safety and efficiency performance in an economical way. The moderating ratio plays a very important role because an adequate election can provide an optimal energy production making the fuel assembly more efficient. This work analyze the moderation ratio as a function of the fuel assembly enrichment and ifs burnup, based on this study the optimal moderation ratio are obtained. Furthermore, based on numerical relations some simulation schemes are proposed to describe the behavior of the infinite multiplication factor as a function of the moderating ratio for a given fuel assembly enrichment at zero burnup. (Author)

  13. Thermal gradients caused by the CANDU moderator circulation

    International Nuclear Information System (INIS)

    Mohindra, V.K.; Vartolomei, M.A.; Scharfenberg, R.

    2008-01-01

    The heavy water moderator circulation system of a CANDU reactor, maintains calandria moderator temperature at power-dependent design values. The temperature differentials between the moderator and the cooler heavy water entering the calandria generate thermal gradients in the reflector and moderator. The resultant small changes in thermal neutron population are detected by the out-of-core ion chambers as small, continuous fluctuations of the Log Rate signals. The impact of the thermal gradients on the frequency of the High Log Rate fluctuations and their amplitude is relatively more pronounced for Bruce A as compared to Bruce B reactors. The root cause of the Log Rate fluctuations was investigated using Bruce Power operating plant information data and the results of the investigation support the interpretation based on the thermal gradient phenomenon. (author)

  14. Low dimensional neutron moderators for enhanced source brightness

    DEFF Research Database (Denmark)

    Mezei, Ferenc; Zanini, Luca; Takibayev, Alan

    2014-01-01

    In a recent numerical optimization study we have found that liquid para-hydrogen coupled cold neutron moderators deliver 3–5 times higher cold neutron brightness at a spallation neutron source if they take the form of a flat, quasi 2-dimensional disc, in contrast to the conventional more voluminous...... for cold neutrons. This model leads to the conclusions that the optimal shape for high brightness para-hydrogen neutron moderators is the quasi 1-dimensional tube and these low dimensional moderators can also deliver much enhanced cold neutron brightness in fission reactor neutron sources, compared...... to the much more voluminous liquid D2 or H2 moderators currently used. Neutronic simulation calculations confirm both of these theoretical conclusions....

  15. Neutronic studies of a liquid hydrogen-water composite moderator

    International Nuclear Information System (INIS)

    Tahara, T.; Ooi, M.; Iwasa, H.; Kiyanagi, Y.; Iverson, E.B.; Crabtree, J.A.; Lucas, A.T.

    2001-01-01

    A liquid hydrogen-liquid water composite moderator may provide performance like liquid methane at high-power spallation sources where liquid methane is impractical. We have measured the neutronic properties of such a composite moderator, where a hydrogen layer 1.25 cm thick was closely backed by water layers of 1.75 cm and 3.75 cm thickness. We also studied a moderator in which a 1.75 cm water layer was closely backed by a 1.25 cm hydrogen layer. We further performed simulations for each of these systems for comparison to the experimental results. We observed enhancement of the spectral intensity in the 'thermal' energy range as compared to the spectrum from a conventional liquid hydrogen moderator. This enhancement grew more significant as the water thickness increased, although the pulse shapes became wider as well. (author)

  16. [Cardiorespiratory capacity in children living at moderate altitude].

    Science.gov (United States)

    Gómez-Campos, Rossana; Arruda, Miguel; Almonacid-Fierro, Alejandro; Holbold, Edílson; Amaral-Camargo, Cristiane; Gamero, Diego; Cossio-Bolanos, Marco A

    2014-04-01

    To determine the cardiorespiratory capacity of school children living at moderate altitude. 795 children (394 children and 401 girls) were selected from urban public schools in Arequipa, Peru at moderate altitude (2,320 m). Anthropometric variables (body mass, height, body fat percentage) and cardiorespiratory capacity were assessed using the Course Navette test, considering the following categories: deficient, poor, fair, good, very good and excellent. The results showed significant differences in all categories (poverweight (r=-0.20 to -0.22) and a moderate negative correlation with obesity (r=-0.39 to -0.42) were described for both genders. Low levels of cardiorespiratory capacity in boys and girls living at moderate altitude are observed, which is negatively correlated with excess body weight. The results suggest that 1 in 5 children are likely to suffer some type of cardiovascular event.

  17. Avoidance orientation moderates the effect of threatening messages

    NARCIS (Netherlands)

    Riet, van 't J.P.; Ruiter, R.A.C.; Vries, de H.

    2012-01-01

    This study investigated the influence of individual differences in people's dispositional avoidance orientation on the persuasive effects of low- and high-threat messages promoting moderate drinking. First, participents (N = 99) individual differences in avoidance orientation were assessed, after

  18. Development of zirconium hydride highly effective moderator materials

    International Nuclear Information System (INIS)

    Yin Changgeng

    2005-10-01

    The zirconium hydride with highly content of hydrogen and low density is new efficient moderator material for space nuclear power reactor. Russia has researched it to use as new highly moderator and radiation protection materials. Japanese has located it between the top of pressure vessel and the main protection as a shelter, the work temperature is rach to 220 degree C. The zirconium hydride moderator blocks are main parts of space nuclear power reactor. Development of zirconium hydride moderator materials have strength research and apply value. Nuclear Power Research and Design Instituteoh China (NPIC) has sep up the hydrogenation device and inspect systems, and accumurate a large of experience about zirconium hydride, also set up a strict system of QA and QC. (authors)

  19. Assessment of the Effects of Moderating Factors of Entrepreneurial ...

    African Journals Online (AJOL)

    Moderating Factors of Entrepreneurial Orientation (EO) on the performance of ... factors such as cultural orientation and organizational structure (internal factors), social economic factors and political and legal factors (external factors) have a ...

  20. On the neutron slowing-down in moderators

    Energy Technology Data Exchange (ETDEWEB)

    Caldeira, Alexandre D., E-mail: alexdc@ieav.cta.br [Instituto de Estudos Avançados (IEAV), São José dos Campos, SP (Brazil). Divisão de Energia Nuclear

    2017-07-01

    Neutron slowing-down is a very important subject to be considered in several areas of nuclear energy application, such as thermal nuclear reactors, nuclear medicine, radiological protection, detectors design and so on. Moderator materials are the responsible to perform this task and among the neutron induced cross sections, the elastic scattering cross section is the main nuclear interaction in this case. At thermal neutron energies, the moderator molecular or crystalline structure become important and dependent on the moderator phase, gas, liquid, or solid, its cross sections and, consequently, the angular and energy distributions of the scattered neutron are affected. The procedures used for generating correctly moderators cross sections at thermal neutron energies from evaluated nuclear data files utilizing the NJOY system are addressed. (author)

  1. St. John Benthic Habitat Mapping - Moderate Depth Ground Validation Sites

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Benthic habitats of the moderate-depth marine environment in and around the Virgin Islands Coral Reef National Monument were mapped using a combination of...

  2. Assessment of a Pressure Tube Rupture with a Poisoned Moderator

    International Nuclear Information System (INIS)

    Kim, S. R.; Kim, B. G.; Kim, S. C.; Kim, E. K.

    2005-01-01

    The postulated in-core LOCA has been analyzed and evaluated while the reactor is operating normally with a low moderator poison concentration for CANDU. However, when the reactor is operating with a relatively large amount of boron and/or gadolinium poison in the moderator, an assessment of the fuel integrity was required for the pressure tube rupture (PTR) accident. Poisoned moderator exists mainly during a startup after a prolonged shutdown lasting for more than one day. For the case of a reactor regulating system (RRS) working, the methodology of the PTR assessment with a poisoned moderator has been developed to determine the effective trip parameters, evaluate the fuel integrity, and establish the standard reactor start-up model for the Wolsong Nuclear Power Plants recently. The developed methodology and results are presented

  3. Does intensity of physical activity moderate interrelationships among ...

    African Journals Online (AJOL)

    Abstract. The aim of this study was to determine whether perceived intensity of training ... intensity of training and functional capacity with various measures of health. Perceived intensity of training had marginally moderating effects on physical ...

  4. Impact of Mild versus Moderate Intensity Aerobic Walking Exercise ...

    African Journals Online (AJOL)

    2014-03-01

    Mar 1, 2014 ... Objective: To compare the effects of mild and moderate intensity treadmill walking exercises on markers of bone ... second group (B) received mild intensity aerobic exercise training. ..... Using functional loading to influence.

  5. Youth Exposed to Terrorism: the Moderating Role of Ideology.

    Science.gov (United States)

    Slone, Michelle; Shur, Lia; Gilady, Ayelet

    2016-05-01

    The present review examines the moderating role of ideology on the effects of war, armed conflict, and terrorism on youth. Ideology is an important factor given the central role played by religio-political ideology and nationalism in present-day conflicts. Ideologies or worldviews represent cognitive frameworks that imbue the traumatic situation with meaning and order. Analysis of the pool of studies identified three categories of ideologically based moderating factors, each representing an aspect of social construction of traumatic events, namely, religion, political ideology, and self-concept. The two closely related categories of religion and politico-religious beliefs showed both positive and negative effects on psychological and psychiatric outcomes among youth. The third category of different aspects of self-concept yielded consistently positive moderating effects. The mechanisms by which each category of ideology moderates effects of exposure to war, armed conflict, and terrorism are discussed, and research and clinical implications are presented.

  6. Neutronic performance issues for the Spallation Neutron Source moderators

    International Nuclear Information System (INIS)

    Iverson, E.B.; Murphy, B.D.

    2001-01-01

    We continue to develop the neutronic models of the Spallation Neutron Source target station and moderators in order to better predict the neutronic performance of the system as a whole and in order to better optimize that performance. While we are not able to say that every model change leads to more intense neutron beams being predicted, we do feel that such changes are advantageous in either performance or in the accuracy of the prediction of performance. We have computationally and experimentally studied the neutronics of hydrogen-water composite moderators such as are proposed for the SNS Project. In performing these studies, we find that the composite moderator, at least in the configuration we have examined, does not provide performance characteristics desirable for the instruments proposed and being designed for this neutron scattering facility. The pulse width as a function of energy is significantly broader than for other moderators, limiting attainable resolution-bandwidth combinations. Furthermore, there is reason to expect that higher-energy (0.1-1 eV) applications will be significantly impacted by bimodal pulse shapes requiring enormous effort to parameterize. As a result of these studies, we have changed the SNS design, and will not use a composite moderator at this time. We have analyzed the depletion of a gadolinium poison plate in a hydrogen moderator at the Spallation Neutron Source, and found that conventional poison thicknesses will be completely unable to last the desired component lifetime of three operational years. A poison plate 300-600 μm thick will survive for the required length of time, but will somewhat degrade the intensity (by as much as 15% depending on neutron energy) and the consistency of the neutron source performance. Our results should scale fairly easily to other moderators on this or any other spallation source. While depletion will be important for all highly-absorbing materials in high-flux regions, we feel it likely that

  7. Calculation of reactivity of control rods in graphite moderated reactors

    International Nuclear Information System (INIS)

    Nakata, H.

    1978-01-01

    A study about the method of calculation for the reactivity of control rods in graphite-moderated critical assemblies, is presented. The result of theoretical calculation, developed by super celles and Nordheim-Scalettar methods are compared with experimental results for the critical Assembly of General Atomic. The two methods are then applicable to reactivity calculation of the control rods of graphite moderated critical assemblies [pt

  8. Graves' hyperthyroidism and moderate alcohol consumption: evidence for disease prevention

    DEFF Research Database (Denmark)

    Carle, A.; Bülow Pedersen, I.; Knudsen, N.

    2013-01-01

    BACKGROUND: We recently demonstrated that moderate alcohol consumption is associated with a considerable reduction in the risk of autoimmune hypothyroidism, similar to findings in other autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. We aimed to study a possible....... CONCLUSIONS: Moderate alcohol consumption is associated with a considerable reduction in the risk of Graves' disease with hyperthyroidism - irrespective of age and sex. Autoimmune thyroid disease seems to be much more dependent on environmental factors than hitherto anticipated....

  9. Management preferences of pediatricians in moderate and severe acute asthma.

    Science.gov (United States)

    Arga, Mustafa; Bakirtas, Arzu; Catal, Ferhat; Derinoz, Oksan; Topal, Erdem; Demirsoy, M Sadik; Turktas, Ipek

    2013-05-01

    To assess and compare management preferences of physicians for moderate and severe acute asthma based on case scenarios and to determine the factors influencing their decisions. A questionnaire based on the Global Initiative on Asthma (GINA) guideline and comprising eight questions on management of acute asthma was delivered to participants of two national pediatric congresses. Management of moderate and severe acute asthma cases was evaluated by two clinical case scenarios for estimation of acute attack severity, initial treatment, treatment after 1h, and discharge recommendations. A uniform answer box comprising the possible choices was provided just below the questions, and respondents were requested to tick the answers they thought was appropriate. Four-hundred and eighteen questionnaires were analyzed. All questions regarding moderate and severe acute asthma case scenarios were answered accurately by 15.8% and 17.0% of physicians, respectively. The initial treatment of moderate and severe cases was known by 100.0% and 78.2% of physicians, respectively. Knowledge of the appropriate plan for treatment after 1h was low both for moderate (45.0%) and severe attacks (35.4%). Discharge recommendations were adequate in 32.5% and 70.8% of physicians for moderate and severe attacks, respectively. Multiple logistic regression analysis revealed that working at a hospital with a continuing medical education program was the only significant predictor of a correct response to all questions regarding severe attacks (p = .04; 95%CI, 1.02-3.21). No predictors were found for information on moderate attacks. Pediatricians have difficulty in planning treatment after 1 hour both for moderate and severe asthma attacks. Postgraduate education programs that target physicians in hospitals without continuing medical education facilities may improve guideline adherence.

  10. Pulsed neutron source cold moderators --- concepts, design and engineering

    International Nuclear Information System (INIS)

    Bauer, Guenter S.

    1997-01-01

    Moderator design for pulsed neutron sources is becoming more and more an interface area between source designers and instrument designers. Although there exists a high degree of flexibility, there are also physical and technical limitations. This paper aims at pointing out these limitations and examining ways to extend the current state of moderator technology in order to make the next generation neutron sources even more versatile and flexible tools for science in accordance with the users' requirements. (auth)

  11. Neutron temperature measurements in a cryogenic hydrogenous moderator

    International Nuclear Information System (INIS)

    Ball, R.M.; Hoovler, G.S.; Lewis, R.H.

    1995-01-01

    Benchmarkings of neutronic calculations are most successful when there is a direct correlation between a measurement and an analytic result. In the thermal neutron energy region, the fluence rate as a function of moderator temperature and position within the moderator is an area of potential correlation. The measurement can be done by activating natural lutetium. The two isotopes of the element lutetium have widely different cross sections and permit the discrimination of flux shape and energy distributions at different reactor conditions. The 175 Lu has a 1/v dependence in the thermal energy region, and 176 Lu has a resonance structure that approximates a constant cross section in the same region. The saturation activation of the two isotopes has been measured in an insulated moderator container at the center of a thermal heterogeneous reactor designed for space nuclear propulsion. The measurements were made in a hydrogenous (polyethylene) moderator at three temperatures (83, 184, and 297 K) and five locations within the moderator. Simultaneously, the reactivity effect of the change in the moderator temperature was determined to be positive with an increase in temperature. The plot of activation shows the variation in neutron fluence rate and current with temperature and explains the positive reactivity coefficient. A neutron temperature can be inferred from a postulated Maxwell-Boltzmann distribution and compared with Monte Carlo or other calculations

  12. Moderation analysis using a two-level regression model.

    Science.gov (United States)

    Yuan, Ke-Hai; Cheng, Ying; Maxwell, Scott

    2014-10-01

    Moderation analysis is widely used in social and behavioral research. The most commonly used model for moderation analysis is moderated multiple regression (MMR) in which the explanatory variables of the regression model include product terms, and the model is typically estimated by least squares (LS). This paper argues for a two-level regression model in which the regression coefficients of a criterion variable on predictors are further regressed on moderator variables. An algorithm for estimating the parameters of the two-level model by normal-distribution-based maximum likelihood (NML) is developed. Formulas for the standard errors (SEs) of the parameter estimates are provided and studied. Results indicate that, when heteroscedasticity exists, NML with the two-level model gives more efficient and more accurate parameter estimates than the LS analysis of the MMR model. When error variances are homoscedastic, NML with the two-level model leads to essentially the same results as LS with the MMR model. Most importantly, the two-level regression model permits estimating the percentage of variance of each regression coefficient that is due to moderator variables. When applied to data from General Social Surveys 1991, NML with the two-level model identified a significant moderation effect of race on the regression of job prestige on years of education while LS with the MMR model did not. An R package is also developed and documented to facilitate the application of the two-level model.

  13. Thermal-hydraulic experiments and analyses on cold moderator

    International Nuclear Information System (INIS)

    Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsushi; Hino, Ryutaro

    2001-01-01

    A cold moderator using supercritical hydrogen is one of the key components in a MW-scale spallation target system, which directly affects the neutronic performance both in intensity and resolution. Since a hydrogen temperature rise in the moderator vessel affects the neutronic performance, it is necessary to suppress the local temperature rise within 3 K. In order to develop the conceptual design of the moderator structure in progress, the flow patterns were measured using a PIV (Particle Image Velocimeter) system under water flow conditions using a flat model that simulated a moderator vessel. From these results, the flow patterns (such as recirculation flows, stagnant flows etc.) were clarified. The hydraulic analytical results obtained using the STAR-CD code agreed well with experimental results. Thermal-hydraulic analyses in the moderator vessel were carried out using the STAR-CD code. Based on these results, we clarified the possibility of suppressing the local temperature rise to within 3 K under 2 MW operating conditions. In order to achieve the cost decreasing of the hydrogen loop, it is necessary to operate it reducing the hydrogen flow rate and the whole hydrogen mass. Then improved moderator concept using blowholes and a twisted tape was proposed, and we have tried to examine the effect of the blowing flow from the inlet pipe. From the experimental and analytical results, the blowing flow could be feasible for the suppression of the stagnant region. (author)

  14. Graphite-moderated and heavy water-moderated spectral shift controlled reactors; Reactores de moderador solido controlados por desplazamiento espectral

    Energy Technology Data Exchange (ETDEWEB)

    Alcala Ruiz, F

    1984-07-01

    It has been studied the physical mechanisms related with the spectral shift control method and their general positive effects on economical and non-proliferant aspects (extension of the fuel cycle length and low proliferation index). This methods has been extended to non-hydrogenous fuel cells of high moderator/fuel ratio: heavy water cells have been con- trolled by graphite rods graphite-moderated and gas-cooled cells have been controlled by berylium rods and graphite-moderated and water-cooled cells have been controlled by a changing mixture of heavy and light water. It has been carried out neutron and thermal analysis on a pre design of these types of fuel cells. We have studied its neutron optimization and their fuel cycles, temperature coefficients and proliferation indices. Finally, we have carried out a comparative analysis of the fuel cycles of conventionally controlled PWRs and graphite-moderated, water-cooled and spectral shift controlled reactors. (Author) 71 refs.

  15. What’s the point of moderation? A discussion of the purposes achieved through contemporary moderation practices

    OpenAIRE

    Bloxham, Susan; Hughes, Clair; Adie, Lenore

    2016-01-01

    An increasingly regulated higher education sector is renewing its attention to those activities referred to as ‘moderation’ in its efforts to ensure that judgements of student achievement are based on appropriate standards. Moderation practices conducted throughout the assessment process can result in purposes identified as equity, justification, accountability and community building. This paper draws on the limited studies of moderation and wider relevant research on judgement, standards and...

  16. Positron reemission: measurement of thin single crystal W(100) films to be used as transmission moderator or re-moderators

    International Nuclear Information System (INIS)

    Chen, D.M.; Lynn, K.G.; Pareja, R.; Nielsen, B.

    1984-11-01

    It has been shown that one can produce thin single crystal W films capable of reemitting positrons at a sufficiently high fraction to be used either as a moderator or as a re-moderator. Both the impurities and the defects could be removed by the appropriate cleaning and annealing procedures, and narrow beam emission could be attained when the films were cleaned. This technique would also be a good method for characterizing defect concentration at interfaces or in thin films

  17. Physical particularities of nuclear reactors using heavy moderators of neutrons

    International Nuclear Information System (INIS)

    Kulikov, G. G.; Shmelev, A. N.

    2016-01-01

    In nuclear reactors, thermal neutron spectra are formed using moderators with small atomic weights. For fast reactors, inserting such moderators in the core may create problems since they efficiently decelerate the neutrons. In order to form an intermediate neutron spectrum, it is preferable to employ neutron moderators with sufficiently large atomic weights, using "2"3"3U as a fissile nuclide and "2"3"2Th and "2"3"1Pa as fertile ones. The aim of the work is to investigate the properties of heavy neutron moderators and to assess their advantages. The analysis employs the JENDL-4.0 nuclear data library and the SCALE program package for simulating the variation of fuel composition caused by irradiation in the reactor. The following main results are obtained. By using heavy moderators with small neutron moderation steps, one is able to (1) increase the rate of resonance capture, so that the amount of fertile material in the fuel may be reduced while maintaining the breeding factor of the core; (2) use the vacant space for improving the fuel-element properties by adding inert, strong, and thermally conductive materials and by implementing dispersive fuel elements in which the fissile material is self-replenished and neutron multiplication remains stable during the process of fuel burnup; and (3) employ mixtures of different fertile materials with resonance capture cross sections in order to increase the resonance-lattice density and the probability of resonance neutron capture leading to formation of fissile material. The general conclusion is that, by forming an intermediate neutron spectrum with heavy neutron moderators, one can use the fuel more efficiently and improve nuclear safety.

  18. Physical particularities of nuclear reactors using heavy moderators of neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Kulikov, G. G., E-mail: ggkulikov@mephi.ru; Shmelev, A. N. [National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) (Russian Federation)

    2016-12-15

    In nuclear reactors, thermal neutron spectra are formed using moderators with small atomic weights. For fast reactors, inserting such moderators in the core may create problems since they efficiently decelerate the neutrons. In order to form an intermediate neutron spectrum, it is preferable to employ neutron moderators with sufficiently large atomic weights, using {sup 233}U as a fissile nuclide and {sup 232}Th and {sup 231}Pa as fertile ones. The aim of the work is to investigate the properties of heavy neutron moderators and to assess their advantages. The analysis employs the JENDL-4.0 nuclear data library and the SCALE program package for simulating the variation of fuel composition caused by irradiation in the reactor. The following main results are obtained. By using heavy moderators with small neutron moderation steps, one is able to (1) increase the rate of resonance capture, so that the amount of fertile material in the fuel may be reduced while maintaining the breeding factor of the core; (2) use the vacant space for improving the fuel-element properties by adding inert, strong, and thermally conductive materials and by implementing dispersive fuel elements in which the fissile material is self-replenished and neutron multiplication remains stable during the process of fuel burnup; and (3) employ mixtures of different fertile materials with resonance capture cross sections in order to increase the resonance-lattice density and the probability of resonance neutron capture leading to formation of fissile material. The general conclusion is that, by forming an intermediate neutron spectrum with heavy neutron moderators, one can use the fuel more efficiently and improve nuclear safety.

  19. Moderator 3-D Thermalhydraulic Analysis Using MODTURCCLAS Code

    International Nuclear Information System (INIS)

    Kim, Hyoung Tae; Yoon, Churl; Park, Joo Hwan

    2008-12-01

    For the moderator subcooling analysis of the refurbished Wolsong NPP (Nuclear Power Plant) Unit 1, the 3-D moderator thermalhydraulic calculations were preliminarily conducted from September to October in 2008, using the preliminary thermalhydraulic analysis results and the MODTURC C LAS (MODerator TURbulent Circulation Co-Located Advanced Solutions) Ver.2.9-IST, which was developed and validated by OPG (Ontario Power Generation) in Canada. The present report consists of the steady-state calculation and transient calculation. First the grid structure, main input parameters, and boundary conditions needed for the steady-state calculation are produced and the steady-state results are obtained. These steady-state results are used for the initial conditions for the transient analysis during a LOCA. The moderator analysis results during the steady-state calculation show the quasy-steady state behavior, because the thermalhydraulic behavior are fluctuating although all boundary conditions are constant. In the transient calculations, based on the present thermalhydraulic analysis results, 3-D thermalhydraulic behavior and moderator subcooling are predicted for the accident scenarios of reactor inlet header 35% and 40% breaks, outlet header 100% break, and pump suction 80% break, subsequent with loss of Class IV power. In the previous moderator analysis for Wolsong NPP Unit 2,3,4 a PHOENICS code was used, which is different from the MODTURC C LAS code used for the analysis of Wolsong NPP Unit 1. However, the moderator subcooling analysis results by these two codes are qualitatively similar. The minimum subcooling for RIH 40% break of Wolsong NPP Unit 1 is 17 .deg. C which is larger than 13 .deg. C for RIH 35% break of Wolsong NPP Unit 2,3,4. Therefore, it is concluded that the refurbished Wolsong NPP Unit 1 satisfies the channel integrity criteria based on the higher subcooling margin compared with that of Wolsong NPP Unit 2,3,4

  20. Individuals underestimate moderate and vigorous intensity physical activity.

    Directory of Open Access Journals (Sweden)

    Karissa L Canning

    Full Text Available BACKGROUND: It is unclear whether the common physical activity (PA intensity descriptors used in PA guidelines worldwide align with the associated percent heart rate maximum method used for prescribing relative PA intensities consistently between sexes, ethnicities, age categories and across body mass index (BMI classifications. OBJECTIVES: The objectives of this study were to determine whether individuals properly select light, moderate and vigorous intensity PA using the intensity descriptions in PA guidelines and determine if there are differences in estimation across sex, ethnicity, age and BMI classifications. METHODS: 129 adults were instructed to walk/jog at a "light," "moderate" and "vigorous effort" in a randomized order. The PA intensities were categorized as being below, at or above the following %HRmax ranges of: 50-63% for light, 64-76% for moderate and 77-93% for vigorous effort. RESULTS: On average, people correctly estimated light effort as 51.5±8.3%HRmax but underestimated moderate effort as 58.7±10.7%HRmax and vigorous effort as 69.9±11.9%HRmax. Participants walked at a light intensity (57.4±10.5%HRmax when asked to walk at a pace that provided health benefits, wherein 52% of participants walked at a light effort pace, 19% walked at a moderate effort and 5% walked at a vigorous effort pace. These results did not differ by sex, ethnicity or BMI class. However, younger adults underestimated moderate and vigorous intensity more so than middle-aged adults (P<0.05. CONCLUSION: When the common PA guideline descriptors were aligned with the associated %HRmax ranges, the majority of participants underestimated the intensity of PA that is needed to obtain health benefits. Thus, new subjective descriptions for moderate and vigorous intensity may be warranted to aid individuals in correctly interpreting PA intensities.

  1. Design concept of the HPLWR moderator flow path

    International Nuclear Information System (INIS)

    Koehly, Christina; Schulenberg, Thomas; Starflinger, Joerg

    2009-01-01

    The latest design concept of the High Performance Light Water Reactor (HPLWR) includes a thermal core in which supercritical water at 25 MPa inlet pressure is heated up from 280degC reactor inlet temperature to 500degC core exit temperature in three steps with intermediate coolant mixing to minimize peak cladding temperatures of the fuel rods. Prior to entering the first fuel assemblies, the coolant is used as moderator in water rods inside assemblies, in the gap volume between assembly boxes, as well as in the surrounding axial or radial reflectors. Even though assembly boxes and moderator rods are designed with a certain thermal insulation, heat is generated in the moderator water or transferred to it from the superheated steam inside assemblies, causing concern of natural convection phenomena with uncontrolled neutronic feedback on the core power distribution. Moreover, bypass flows of the moderator water need to be minimized at any thermal expansion of the reactor internal structures to avoid an unpredictable moderator mass flow. The design concept of the moderator flow path described in this paper is trying to overcome these problems. Downward flow of moderator water is limited to sub-cooled conditions, well below the pseudo-critical point of supercritical water. Dedicated orifices are foreseen to allow later correction of the mass flow split. The sealing concept accounts for larger thermal expansions of reactor components by using C-rings or bellows. A welded construction is preferred wherever possible to minimize leakage. The removable steam plenum is aligned at the extractable steam pipes to minimize thermal displacements at the sealing positions. The paper is showing several design details to illustrate the technical solutions. (author)

  2. "Eesti elab varasemate saavutuste arvel" / Edward Lucas ; interv. Argo Ideon

    Index Scriptorium Estoniae

    Lucas, Edward

    2007-01-01

    Briti nädalalehe The Economist Kesk- ja Ida-Euroopa korrespondent avaldab arvamust Eesti senise valitsuse, peaminister Andrus Ansipi kohta. Ta tunneb muret, et majanduskasv pöörab langusele, haavatavaks kohaks peab ta jooksevkonto puudujääki. Tema hinnangul on Eestil väga tähtis minna edasi haridusreformiga

  3. Recent applications of neutron activation analysis at Lucas Heights

    International Nuclear Information System (INIS)

    Fardy, J.J.

    1978-01-01

    The use of neutron activation analysis to determine key elemental distribution patterns in samples from both the energy industry and health science field is summarised. Instrumental neutron activation analysis has successfully measured simultaneously more than twenty elements in a sample of brown coal from Victoria, black coal from New South Wales and samples from the product stream of ACIRL's batch autoclave, solvent-refined, coal hydrogenation process. Four gallstones removed from the same gallbladder have been examined instrumentally by neutron activation analysis. A total of sixteen trace elements were detected with concentrations in the range 0.8 ng g -1 for gold to 7,800 μg g -1 for calcium

  4. DIGITAL FLOOD INSURANCE RATE MAP DATABASE, LUCAS COUNTY, OHIO

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk...

  5. Vrede en oordeel in het evangelie volgens Lucas

    Directory of Open Access Journals (Sweden)

    Huub Welzen

    2015-08-01

    Full Text Available Peace and judgement in the gospel according to Luke. Quite rightly Luke is called an evangelist of peace and non-violence. It is recognised in several studies that peace, nonviolence and love for the enemy are integral parts of the message of the Lucan Jesus. Yet this statement cannot be made without criticism. In the gospel of Luke there are many texts in which violence is present, which is incongruent with the message of peace and non-violence. Sometimes there is even violence that is excessive. In many of these texts violence has to do with vengeance in the judgement. In some recent studies the relation of the peace-message of Jesus and the retribution in the judgement is discussed. In this article we first examine the problem of violence in Luke’s gospel with the help of Luke 19:9–27. In the vision of Luke the destruction of Jerusalem in 70 CE is a consequence of the refusal to accept the message of Jesus. To understand this it is necessary to place the fall of Jerusalem in the eschatological timetable of Luke. We see here a certain equivalence between the situation of the contemporaries of Jesus within the gospel and the situation of the intended readers in the last quarter of the first century CE. Moreover we propose to reverse the way the question is put. We do not have to enlighten how it is possible that after the peace-message of Jesus there will be vengeance in the judgement. First there is the announcement of the judgement. After that a delay is announced for the contemporaries of Jesus as well as for the intended readers of Luke’s gospel: a year of the Lord’s favour. This delay gives room for repentance. (Full text article to follow

  6. De Dickson a Lucas: Descubriendo el cine digital

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Cortés S.

    2015-01-01

    Full Text Available La irrupción de la televisión en la vida cotidiana de los ciudadanos urbanos (1940 obligó al cine a cambiar su proporción de pantalla a fin de atraer espectadores. En América Latina los cineastas se han introducido de lleno en los terrenos digitales. El cine digital crea un cambio profundo en la forma en que las películas se envían, distribuyen y exhiben. Se trata también de renacer el cine independiente con la posibilidad de crear sistemas de producción y distribución de costo bajo y abrir exhibiciones propias por fuera de los circuitos comerciales. Es un hecho la coexistencia de cine, vídeo e Internet como las tres bases de una emergente industria contemporánea basada en la televisión digital (DTV, el formato de alta definición (HDTV y el soporte de DVD (vídeo digital versátil

  7. 3rd AINSE neutron scattering conference, Lucas Heights -AINSE Theatre

    International Nuclear Information System (INIS)

    1986-01-01

    Abstracts of papers, the conference program and general information is included in the conference handbook. The program is divided into the following sessions: hydrogeneous and biological materials, industrial applications, phase transitions, magnetism, small angle neutron scattering and new developments

  8. On aeg taguda trumme Steadfast Jazzi toetuseks / Edward Lucas

    Index Scriptorium Estoniae

    Lucas, Edward, 1962-

    2013-01-01

    2013. a. novembris toimuvast NATO viimase 20 aasta kõige suuremast õppusest, mille käigus harjutavad liitlasväed liikmesriikide territooriumide kaitsmist. Õppus kannab nime SFJZ13 või Steadfast Jazz 2013

  9. Name them and remember : Commemorating communism's victims / Edward Lucas

    Index Scriptorium Estoniae

    Lucas, Edward

    2007-01-01

    Kommunismiohvrite mälestamisest. Autor viitab ka president Toomas Hendrik Ilvese ettepanekule rajada memoriaal Eesti kommunismiohvritele. T.H. Ilves kõneles sellest taas seoses 1944. a. septembris Eestit valitsenud Otto Tiefi valitsuse liikmete mälestamisega

  10. Kas see kõik oli hirmus viga? / Edward Lucas

    Index Scriptorium Estoniae

    Lucas, Edward, 1962-

    2009-01-01

    Autor vaatab tagasi Eestis toimunud reformidele ning avaldab arvamust, mida oleks võinud teha teisiti. Suurimaks läbikukkumiseks nimetab ta kinnisvaramulli kiiret kasvu ja suutmatust rakendada konservatiivsemat rahapoliitikat, kuid märgib, et Eesti on end okupatsioonivaremetest hämmastavalt kiiresti üles ehitanud

  11. Enhancing neutron beam production with a convoluted moderator

    Energy Technology Data Exchange (ETDEWEB)

    Iverson, E.B., E-mail: iversoneb@ornl.gov [Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Baxter, D.V. [Center for the Exploration of Energy and Matter, Indiana University, Bloomington, IN 47408 (United States); Muhrer, G. [Lujan Neutron Scattering Center, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545 (United States); Ansell, S.; Dalgliesh, R. [ISIS Facility, Rutherford Appleton Laboratory, Chilton (United Kingdom); Gallmeier, F.X. [Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Kaiser, H. [Center for the Exploration of Energy and Matter, Indiana University, Bloomington, IN 47408 (United States); Lu, W. [Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)

    2014-10-21

    We describe a new concept for a neutron moderating assembly resulting in the more efficient production of slow neutron beams. The Convoluted Moderator, a heterogeneous stack of interleaved moderating material and nearly transparent single-crystal spacers, is a directionally enhanced neutron beam source, improving beam emission over an angular range comparable to the range accepted by neutron beam lines and guides. We have demonstrated gains of 50% in slow neutron intensity for a given fast neutron production rate while simultaneously reducing the wavelength-dependent emission time dispersion by 25%, both coming from a geometric effect in which the neutron beam lines view a large surface area of moderating material in a relatively small volume. Additionally, we have confirmed a Bragg-enhancement effect arising from coherent scattering within the single-crystal spacers. We have not observed hypothesized refractive effects leading to additional gains at long wavelength. In addition to confirmation of the validity of the Convoluted Moderator concept, our measurements provide a series of benchmark experiments suitable for developing simulation and analysis techniques for practical optimization and eventual implementation at slow neutron source facilities.

  12. Delinquent peer affiliation as an etiological moderator of childhood delinquency.

    Science.gov (United States)

    Burt, S A; Klump, K L

    2013-06-01

    Prior research has indicated that affiliation with delinquent peers activates genetic influences on delinquency during adolescence. However, because other studies have indicated that the socializing effects of delinquent peers vary dramatically across childhood and adolescence, it is unclear whether delinquent peer affiliation (DPA) also moderates genetic influences on delinquency during childhood. Method The current study sought to evaluate whether and how DPA moderated the etiology of delinquency in a sample of 726 child twins from the Michigan State University Twin Registry (MSUTR). The results robustly supported etiological moderation of childhood delinquency by DPA. However, this effect was observed for shared environmental, rather than genetic, influences. Shared environmental influences on delinquency were found to be several-fold larger in those with higher levels of DPA as compared to those with lower levels. This pattern of results persisted even when controlling for the overlap between delinquency and DPA. Our findings bolster prior work in suggesting that, during childhood, the association between DPA and delinquency is largely (although not solely) attributable to the effects of socialization as compared to selection. They also suggest that the process of etiological moderation is not specific to genetic influences. Latent environmental influences are also amenable to moderation by measured environmental factors.

  13. A safety concern related to CANDU moderator subcooling and status of KAERI moderator circulation test (MCT) experiments

    International Nuclear Information System (INIS)

    Rhee, Bo W.; Kim, Hyoung T.; Kim, Tongbeum; Im, Sunghyuk

    2015-01-01

    The flow inside the moderator tank of a CANDU-6 reactor during full power steady state operation has been suspected to be operating in the buoyancy/inertial driven mixed convection regime as illustrated in the middle figure. At some regions of the moderator tank where the buoyancy driven upward flow and the inertial momentum driven downward flows interface counter-currently, there exist some interface regions between these two flows like the middle one, and the local temperatures at these interface regions are known to oscillate with different amplitude at various fluctuation frequencies as shown. According to a numerical simulation of the moderator flow and temperature distribution at full power steady state carried out by previous researches showed that any small disturbances in the flow or temperature may initiate the system unstable and aggravate the asymmetric flow and temperature patterns. The tests at the 3-D Moderator Test Facility (MTF) that is a representative scaled-down of CANDU reactors, reproduced the expected and observed moderator behavior in the reactor as well as the local temperature fluctuations arising from the delicate balance of forced and buoyancy induced flow. This observation raised a safety concern as the local moderator temperature at some regions showed fluctuations with an amplitude that may jeopardize the safety margin, i.e. the difference between the available subcooling and the subcooling requirement. The scope of this paper is to review the basis of the safety concern related to this moderator subcooling and local temperature fluctuation and describe the current status of MCT erection and some of the experiments carried so far

  14. The high moderating ratio reactor using 100% MOX reloads

    International Nuclear Information System (INIS)

    Barbrault, P.

    1994-06-01

    This report presents the concept of a High Moderating ratio Reactor, which should accept 100% MOX reloads. This reactor aims to be the plutonium version of the European Pressurized Reactor (EPR), which is developed jointly by French and German companies. A moderating ration of 2.5 (instead of the standard value of 2.0) is obtained by replacing several fuel rods by water holes. The core would contain 241 Fuel Assemblies. We present some advantages of over-moderation for plutonium fuel, a description of the core and assemblies, calculations of fuel reload schemes and Reactivity Shutdown Margins, and the behavior of the core during two occidental transients. (author). 2 refs., 9 figs., 2 tabs

  15. Moderators of the Relationship between Implicit and Explicit Evaluation

    Science.gov (United States)

    Nosek, Brian A.

    2005-01-01

    Automatic and controlled modes of evaluation sometimes provide conflicting reports of the quality of social objects. This paper presents evidence for four moderators of the relationship between automatic (implicit) and controlled (explicit) evaluations. Implicit and explicit preferences were measured for a variety of object pairs using a large sample. The average correlation was r = .36, and 52 of the 57 object pairs showed a significant positive correlation. Results of multilevel modeling analyses suggested that: (a) implicit and explicit preferences are related, (b) the relationship varies as a function of the objects assessed, and (c) at least four variables moderate the relationship – self-presentation, evaluative strength, dimensionality, and distinctiveness. The variables moderated implicit-explicit correspondence across individuals and accounted for much of the observed variation across content domains. The resulting model of the relationship between automatic and controlled evaluative processes is grounded in personal experience with the targets of evaluation. PMID:16316292

  16. Moderator veranderlikes en differensiele geldigheid van die aansoekvorm

    Directory of Open Access Journals (Sweden)

    A. de Bod

    1977-11-01

    Empiriese studies toon dat die Geweegde Aansoekvorm (G.A.V. 'n doeltreffende voorspellingsinstrument in personeelseleksie is. Daar is egter studies wat voorspel dat die voorspellingsgeldigheid van die G.A.V. in die literatuur aansienlik oorbeklemtoon word. Teenstrydig met die beginsels van klassieke psigometriese teorie word voorgestel dat moderator veranderlikes vir hierdie paradoks verantwoordelik is. Hierdie studie toon hoe die biografiese korrelate van dienstyd as moderators fungeer en empiriese bewys van die modererende effek op die voorspellingsgeldigheid van die G.A.V. word gelewer. Daar word voorgestel dat ‘n nuwe benadering tot die ontwikkeling van die G.A.V. noodsaaklik is ten einde die effek van moderators te benut.

  17. European consumers’ perception of moderate wine consumption on health

    Directory of Open Access Journals (Sweden)

    Riccardo Vecchio

    2017-06-01

    Full Text Available The present study examines the perceptions that French, Italian and Spanish consumers have about the possible health effects of what they consider to be a moderate wine consumption. Furthermore, it identifies whether the following factors positively or negatively influence consumer opinion – wine appreciation, environmental awareness, environmental labels, local legislation and media coverage. Perceptions were identified through an online survey of 1183 respondents. The respondents perceive wine as a rather healthy product if consumed moderately. Wine appreciation positively influences the perception of a healthy effect of moderate wine consumption. French policies advising constraints on wine consumption indirectly influence consumer opinion about the unhealthy effects caused by wine. French and Spanish consumers with high environmental awareness perceive a wine with an eco-label to be healthier than a conventional one.

  18. The ideology of moderated modernism in Serbian music and musicology

    Directory of Open Access Journals (Sweden)

    Medić Ivana

    2007-01-01

    Full Text Available The term ′moderated modernism′ has been current for quite some time in Serbian music historiography, but there have been only a few attempts to define it. I shall try to define the term, introduce some of its key concepts and features and demonstrate its applicability. Although moderated modernism was an international phenomenon which had divergent manifestations in various periods before and after the Second World War throughout Europe, my aim is to focus on the period between the decline of Socialist Realism and the ascent of post-modernism (roughly 1950 to 1980 in socialist Serbia, and to discuss the discourses and ideologies surrounding moderated modernism then and there.

  19. Is Familiarity a Moderator of Brand/Country Alliances?

    DEFF Research Database (Denmark)

    Kristensen, Tore; Gabrielsen, Gorm; Jaffe, Eugene D.

    2014-01-01

    Product and brand familiarity have an important role in consumer choice behaviour and they have been equated with knowledge and experience Consumers having high and low familiarity utilized brand information (an extrinsic cue) in their evaluations, whereas moderately familiar consumers used...... intrinsic cues (product attributes) in evaluating products. The question of whether familiarity moderates the country-of-origin (COO) effect is a valid one. In this present paper, we attempt to provide additional evidence as to how familiarity with products, brands and countries moderates consumer...... evaluation of brand/country alliances. Specifically, we concentrate on the brand leveraging process identified by Keller (2003) applied to the effect of familiarity on country/brand alliances....

  20. Neutron spectra produced by moderating an isotopic neutron source

    International Nuclear Information System (INIS)

    Carrillo Nunnez, Aureliano; Vega Carrillo, Hector Rene

    2001-01-01

    A Monte Carlo study has been carried out to determine the neutron spectra produced by an isotopic neutron source inserted in moderating media. Most devices used for radiation protection have a response strongly dependent on neutron energy. ISO recommends several neutron sources and monoenergetic neutron radiations, but actual working situations have broad spectral neutron distributions extending from thermal to MeV energies, for instance, near nuclear power plants, medical applications accelerators and cosmic neutrons. To improve the evaluation of the dosimetric quantities, is recommended to calibrate the radiation protection devices in neutron spectra which are nearly like those met in practice. In order to complete the range of neutron calibrating sources, it seems useful to develop several wide spectral distributions representative of typical spectra down to thermal energies. The aim of this investigation was to use an isotopic neutron source in different moderating media to reproduce some of the neutron fields found in practice. MCNP code has been used during calculations, in these a 239PuBe neutron source was inserted in H2O, D2O and polyethylene moderators. Moderators were modeled as spheres and cylinders of different sizes. In the case of cylindrical geometry the anisotropy of resulting neutron spectra was calculated from 0 to 2 . From neutron spectra dosimetric features were calculated. MCNP calculations were validated by measuring the neutron spectra of a 239PuBe neutron source inserted in a H2O cylindrical moderator. The measurements were carried out with a multisphere neutron spectrometer with a 6LiI(Eu) scintillator. From the measurements the neutron spectrum was unfolded using the BUNKIUT code and the UTA4 response matrix. Some of the moderators with the source produce a neutron spectrum close to spectra found in actual applications, then can be used during the calibration of radiation protection devices

  1. Variation of Neutron Moderating Power on HDPE by Gamma Radiation

    International Nuclear Information System (INIS)

    Park, Kwang June; Ju, June Sik; Kang, Hee Young; Shin, Hee Sung; Kim, Ho Dong

    2009-01-01

    High density polyethylene (HDPE) is degraded due to a radiation-induced oxidation when it is used as a neutron moderator in a neutron counter for a nuclear material accounting of spent fuels. The HDPE exposed to the gamma-ray emitted from the fission products in a spent nuclear fuel results in a radiation-induced degradation which changes its original molecular structure to others. So a neutron moderating power variation of HDPE, irradiated by a gamma radiation, was investigated in this work. Five HDPE moderator structures were exposed to the gamma radiation emitted from a 60 Co source to a level of 10 5 -10 9 rad to compare their post-irradiation properties. As a result of the neutron measurement test with 5 irradiated HDPE structures and a neutron measuring system, it was confirmed that the neutron moderating power for the 105 rad irradiated HDPE moderator revealed the largest decrease when the un-irradiated pure one was used as a reference. It implies that a neutron moderating power variation of HDPE is not directly proportional to the integrated gamma dose rate. To clarify the cause of these changes, some techniques such as a FTIR, an element analysis and a densitometry were employed. As a result of these analyses, it was confirmed that the molecular structure of the gamma irradiated HDPEs had partially changed to others, and the contents of hydrogen and oxygen had varied during the process of a radiation-induced degradation. The mechanism of these changes cannot be explained in detail at present, and thus need further study

  2. Edward Lucas: Venemaa loodab suhete "restart´i" teha ka Balti riikidega / Edward Lucas ; intervjueerinud Argo Ideon

    Index Scriptorium Estoniae

    Lucas, Edward

    2010-01-01

    Eesti-Vene suhete arengust, Eesti sisepoliitikast, liitumisest euroga, riigieelarve kärbetest, Euroopa riikide suhtumisest Eestis toimuvasse, diplomaatilisi suhteid käsitlevate dokumentide jõudmisest internetti

  3. Transient Moderator Simulation Using CFX10-CAMO, a CANDU Moderator Analysis Model Based on a Coupled Solver

    International Nuclear Information System (INIS)

    Yoon, Churl; Park, Joo Hwan

    2007-01-01

    When a PHT(Primary Heat Transfer) system fails to remove excess heat from fuel channels for some loss of coolant accidents(LOCA's) in CANDU NPP's, the fuel channel temperature could increase until the pressure tube strains (i.e., balloon or sag) to contact its surrounding Calandria tube.(PT/CT contact) Following a PT/CT contact, there is a spike in the heat flux to the moderator surrounding the Calandria tube, which may lead to a sustained CT dryout and also a failure of a fuel channel. The prevention of a CT dryout following a PT/CT contact depends on the local moderator subcooling. That is, fuel channel integrity depends on the capability of the moderator to act as the ultimate heat sink for some LOCA's in a CANDU reactor. In KAERI, Yoon et al. developed a CFD model for predicting a CANDU-6 moderator temperature on the basis of a commercial CFD code CFX-4(ANSYS Inc.). This analytic model has the strength of modelling the hydraulic resistances in the core region and accounting for a heat source term in the energy equations. But convergence difficulties and a slow computing speed are the limitations of this model, because the CFX-4 code adapts a segregated solver to resolve a moderator circulation including a strong coupled-effect. Compared to a segregated solver, a coupled-solver is highly efficient and robust especially for a flow with a strong interference between the variables such as combustion

  4. Can a Mediator Moderate? Considering the Role of Time and Change in the Mediator-Moderator Distinction.

    Science.gov (United States)

    Karazsia, Bryan T; Berlin, Kristoffer S

    2018-01-01

    The concepts of mediation and moderation are important for specifying ways in which psychological treatments work and for whom they are most beneficial. Historically, the terms were confused and used interchangeably, so a rich body of scholarly literature makes clear their distinction. Researchers are also becoming increasingly aware that mediation and moderation can be integrated and that such integration can advance theory development and testing. One question that has not received sufficient attention is whether a mediator can simultaneously moderate. We tackle this question in this paper, and in doing so we expand on the MacArthur conceptualizations of mediation and moderation. The result is a presentation of a meta-theoretical model that illustrates how a construct that is initially a mediator can, not simultaneously but over time, evolve into a construct that moderates. When this occurs, a construct that changed for the better as a result of an intervention can later promote more positive change during a later intervention. Various implications of this novel paradigm for future research are discussed, including the importance of this model in the emerging context of managed health care. Copyright © 2017. Published by Elsevier Ltd.

  5. Estimation of attenuation and moderation by nanostructured materials

    International Nuclear Information System (INIS)

    Artem'ev, V.A.

    2003-01-01

    Peculiarities of the attenuation and slowing down of neutrons in ultradispersed powder with the size of particles ∼ 10 nm are discussed. It is noted that at temperature ∼ 10 K ultradispersed powder possesses the best captured ability of thermal neutrons than ordinary compact material or finely divided powder. Slow neutrons capture is size of ultradispersed particles dependent: captured ability of the material tends to widen with the decrease of particles sizes. Use of ultradispersed powder as moderator is advantageous for the cold neutrons moderation to very cold or for the production of ultracold neutrons [ru

  6. Encouraging moderation: clues from a simple model of ideological conflict.

    Science.gov (United States)

    Marvel, Seth A; Hong, Hyunsuk; Papush, Anna; Strogatz, Steven H

    2012-09-14

    Some of the most pivotal moments in intellectual history occur when a new ideology sweeps through a society, supplanting an established system of beliefs in a rapid revolution of thought. Yet in many cases the new ideology is as extreme as the old. Why is it then that moderate positions so rarely prevail? Here, in the context of a simple model of opinion spreading, we test seven plausible strategies for deradicalizing a society and find that only one of them significantly expands the moderate subpopulation without risking its extinction in the process.

  7. Fissile fuel assembly for a sub-moderated nuclear reactor

    International Nuclear Information System (INIS)

    Millot, J.P.; Dejeux, Pol.; Alibran, Patrice.

    1983-01-01

    Each of the core assemblies is composed of a prismatic case made of a neutron absorbing material, inside which very long rods containing the fissile material are arranged parallel to the height of the case and according to a regular network in the straight sections of the case. At least one piece in a fertile material exposed to the neutrons emitted by the fissile material of the assembly is arranged on each one of the side faces of the case. The invention applies in particular to sub-moderated reactors, cooled and moderated by pressurized water [fr

  8. Automation techniques applied to systematic studies of moderator coupling

    International Nuclear Information System (INIS)

    Ansell, S.; Garcia, J.F.; Bennington, S.M.; Picton, D.J.; Broome, T.

    2004-01-01

    We present new computation methods in which the geometry management of MCNPX input files can be automated. We demonstrate this method with respect to the target station 2 design at ISIS. The method presented is not a mathematically robust method, but by starting from a valid baseline model allows this model to be mutated in a reliable way. Those features that still need to be improved and added are discussed at the end. We use this method to show that a mixed lead/water pre-moderator gives a better neutron flux to radiation damage ratio for the coupled moderator. (orig.)

  9. Adaptability and Life Satisfaction: The Moderating Role of Social Support

    Science.gov (United States)

    Zhou, Mi; Lin, Weipeng

    2016-01-01

    The purpose of this study was to investigate the moderating role of social support in the relationship between adaptability and life satisfaction. Data were collected from 99 undergraduate freshmen in a Chinese university using a lagged design with a 1-month interval. Results demonstrated that social support moderated the relation between adaptability and life satisfaction, such that the positive relation between adaptability and life satisfaction was stronger for individuals with higher levels of social support than for individuals with lower levels of social support. The theoretical and practical implications of this result are discussed. PMID:27516753

  10. The Great Moderation and the U.S. External Imbalance

    OpenAIRE

    Alessandra Fogli; Fabrizio Perri

    2006-01-01

    The early 1980s marked the onset of two striking features of the current world macroeconomy: the fall in U.S. business cycle volatility (the ggreat moderation h) and the large and persistent U.S. external imbalance. In this paper, we argue that an external imbalance is a natural consequence of the great moderation. If a country experiences a fall in volatility greater than that of its partners, its incentives to accumulate precautionary savings fall and this results in a permanent deteriorati...

  11. A General Model for Testing Mediation and Moderation Effects

    Science.gov (United States)

    MacKinnon, David P.

    2010-01-01

    This paper describes methods for testing mediation and moderation effects in a dataset, both together and separately. Investigations of this kind are especially valuable in prevention research to obtain information on the process by which a program achieves its effects and whether the program is effective for subgroups of individuals. A general model that simultaneously estimates mediation and moderation effects is presented, and the utility of combining the effects into a single model is described. Possible effects of interest in the model are explained, as are statistical methods to assess these effects. The methods are further illustrated in a hypothetical prevention program example. PMID:19003535

  12. A modular approach to the design of cold moderators

    International Nuclear Information System (INIS)

    Lucas, A.T.

    1998-01-01

    Cold moderators are usually designed to the specific requirements of the parent neutron source. However since all cryogenic moderators within a broad design envelope require certain common parameters, it should be possible to create a central core design served by smaller packages designed, or selected to satisfy a wide range of individual requirements. This paper describes a modular design philosophy that has been applied to two very different cold sources with only minor changes to two of the modules in the system. Both of the systems and the basic differences between them are described in detail

  13. Sex differences in interpersonal problems: does sexual orientation moderate?

    Science.gov (United States)

    Lee, Debbiesiu L; Harkless, Lynn E; Sheridan, Daniel J; Winakur, Emily; Fowers, Blaine J

    2013-01-01

    Sexual orientation was examined as a moderator in the relation between biological sex and interpersonal problems. Participants were 60 lesbians, 45 heterosexual women, 37 gay men, and 39 heterosexual men, who completed the Inventory of Interpersonal Problems-Circumplex. Sexual orientation was found to moderate one of the eight interpersonal problems under study. Heterosexual women scored significantly higher than lesbian women in Non-assertive. Although hypothesized, gay men did not differ from heterosexual men along the Dominant-Cold quadrant. Implications of these results are discussed.

  14. The moderating role of human values in planned behavior

    DEFF Research Database (Denmark)

    Zhou, Y.; Thøgersen, John; Ruan, Y.

    2013-01-01

    and filled out a questionnaire outside upscale supermarkets in Guangzhou. Multigroup structural equation modeling was used to test hypotheses about personal values’ moderating effect in the theory of planned behavior. Findings – Self-transcendence values moderate the relationship between two antecedents...... and behavioral intentions: the attitude towards buying organic food and perceived behavioral control. Both of these antecedents have a stronger impact on intentions among consumers with strong selftranscendence values than among consumers with weak ones. Research limitations/implications – The study is based...

  15. Nuclear calculation methods for light water moderated reactors

    International Nuclear Information System (INIS)

    Hicks, D.

    1961-02-01

    This report is intended as an introductory review. After a brief discussion of problems encountered in the nuclear design of water moderated reactors a comprehensive scheme of calculations is described. This scheme is based largely on theoretical methods and computer codes developed in the U.S.A. but some previously unreported developments made in this country are also described. It is shown that the effective reproduction factor of simple water moderated lattices may be estimated to an accuracy of approximately 1%. Methods for treating water gap flux peaking and control absorbers are presented in some detail, together with a brief discussion of temperature coefficients, void coefficients and burn-up problems. (author)

  16. Automation techniques applied to systematic studies of moderator coupling

    Energy Technology Data Exchange (ETDEWEB)

    Ansell, S; Garcia, J F; Bennington, S M; Picton, D J; Broome, T [Rutherford Appleton Lab, Chilton (United Kingdom)

    2004-03-01

    We present new computation methods in which the geometry management of MCNPX input files can be automated. We demonstrate this method with respect to the target station 2 design at ISIS. The method presented is not a mathematically robust method, but by starting from a valid baseline model allows this model to be mutated in a reliable way. Those features that still need to be improved and added are discussed at the end. We use this method to show that a mixed lead/water pre-moderator gives a better neutron flux to radiation damage ratio for the coupled moderator. (orig.)

  17. Adaptability and Life Satisfaction: The Moderating Role of Social Support.

    Science.gov (United States)

    Zhou, Mi; Lin, Weipeng

    2016-01-01

    The purpose of this study was to investigate the moderating role of social support in the relationship between adaptability and life satisfaction. Data were collected from 99 undergraduate freshmen in a Chinese university using a lagged design with a 1-month interval. Results demonstrated that social support moderated the relation between adaptability and life satisfaction, such that the positive relation between adaptability and life satisfaction was stronger for individuals with higher levels of social support than for individuals with lower levels of social support. The theoretical and practical implications of this result are discussed.

  18. Generating electricity at a breakwater in a moderate wave climate

    NARCIS (Netherlands)

    Schoolderman, J.; Reedijk, B.; Vrijling, J.K.; Molenaar, W.F.; Ten Oever, E.; Zijlema, M.

    2011-01-01

    A new concept for wave energy conversion is examined as a proof of concept for generating electricity in a moderate wave climate while being integrated in a caisson breakwater. Physical model testing is performed to analyse the preliminary efficiency of the device and to identify areas of

  19. Friendships Moderate Psychosocial Maladjustment in Socially Anxious Early Adolescents

    Science.gov (United States)

    Erath, Stephen A.; Flanagan, Kelly S.; Bierman, Karen L.; Tu, Kelly M.

    2010-01-01

    Close mutual friendships may help protect socially anxious early adolescents against concurrent psychosocial risks. This study investigated whether close mutual friendships moderated associations among social anxiety and several indices of psychosocial maladjustment (loneliness, peer victimization, and low social self-efficacy) in early…

  20. Enhancing the Ties that Bind: Mentoring as a Moderator

    Science.gov (United States)

    Dawley, David. D.; Andrews, Martha C.; Bucklew, Neil S.

    2010-01-01

    Purpose: The purpose of this paper is to examine the moderating role of mentoring on the relationships between perceived organizational support, supervisor support, and job fit on turnover intentions. Design/methodology/approach: The paper explains the topics, provides background and discussion of the main concepts. The study uses regression…

  1. Parenting Style as a Moderator for Students' Academic Achievement

    Science.gov (United States)

    Ishak, Zahari; Low, Suet Fin; Lau, Poh Li

    2012-01-01

    Parenting styles have always been a crucial factor in influencing all aspects of a person's development. The purpose of this study is to test the structural equation model of academic achievement among the students using parenting styles as a moderator. The sample comprised 493 students from eight schools. Parenting styles are determined using the…

  2. Impact of Mild versus Moderate Intensity Aerobic Walking Exercise ...

    African Journals Online (AJOL)

    Background: Patients with hemophilia A have low bone density than healthy controls. It is now widely recognized that physical activity and sports are beneficial for patients with hemophilia. Objective: The aim of this study was to compare the effects of mild and moderate intensity treadmill walking exercises on markers of ...

  3. Molecular responses to moderate endurance exercise in skeletal muscle

    Science.gov (United States)

    This study examined alterations in skeletal-muscle growth and atrophy-related molecular events after a single bout of moderate-intensity endurance exercise. Muscle biopsies were obtained from 10 men (23 +/- 1 yr, body mass 80 +/- 2 kg, and VO(2peak) 45 +/- 1 ml x kg'¹ x min'¹) immediately (0 hr) and...

  4. What to Do With "Moderate" Reliability and Validity Coefficients?

    NARCIS (Netherlands)

    Post, Marcel W

    Clinimetric studies may use criteria for test-retest reliability and convergent validity such that correlation coefficients as low as .40 are supportive of reliability and validity. It can be argued that moderate (.40-.60) correlations should not be interpreted in this way and that reliability

  5. Minor Actinide Burn in Thermal Spectrum with Enhanced Moderation

    International Nuclear Information System (INIS)

    Petrovic, B.; Huang, L. M.

    2010-01-01

    Resolving the issue of spent nuclear fuel and nuclear waste management is the necessary condition for long-term sustainability of nuclear power, and requires addressing plutonium, minor actinides (MA) and fission products. Various strategies from once-through homogeneous burn to partitioning and transmutation, and from thermal to fast systems, are being considered. The optimum system-level performance will likely require advanced critical or subcritical systems with a range of neutron spectra. Thermal systems, while not optimum, may be deployed sooner, and may provide mid-term amelioration of the issue. This paper examines burn of MA in thermal systems. One specific concern in this case is deterioration of safety parameters due to a high thermal absorption cross section of MA. Enhanced moderation has potential to at least partly remedy this concern. Therefore, we have evaluated adopting the IRIS neutronic design to MA burn. The IRIS reactor design offers enhanced safety margin, due to its fully passive safety systems and safety-by-design approach. Also, in addition to the standard UO 2 fuel (reference IRIS design), an alternative core with enhanced moderation fuel was considered. These two features (safety margin, enhanced moderation) provide a good starting point for MA burn in a thermal system. Further modifications to accommodate MA-bearing rods will be discussed. The paper will examine the benefit of the enhanced moderation in comparison to homogeneous MA burn in a typical PWR reactor.(author).

  6. Physiological benefits of a prolonged moderate intensity endurance ...

    African Journals Online (AJOL)

    Objectives. To assess the physiological changes that take place in patients with coronary artery disease after 6 and 18 months of moderate-intensity endurance training. Design. Prospective non-randomised controlled study. Setting. Joharmesburg Cardiac Rehabilitation Centre, a community-based phase ill cardiac ...

  7. The myth of financial innovation and the great moderation

    NARCIS (Netherlands)

    den Haan, W.; Sterk, V.

    2009-01-01

    Financial innovation is widely believed to be at least partly responsible for the recent financial crisis. At the same time, there are empirical and theoretical arguments that support the view that changes in financial markets played a role in the "great moderation". If both are true, then the price

  8. Religious Neutrality, Toleration and Recognition in Moderate Secular States

    DEFF Research Database (Denmark)

    Lægaard, Sune

    2011-01-01

    investigates a particular case of an arguably reasonably liberal state, namely the Danish state, which is used as a particular illustration of themore general phenomenon of “moderately secular” states, and considers how one might understand its relations to religion. The paper then considers the applicability...

  9. Moderating Effects of Culture in Transfer of Knowledge

    DEFF Research Database (Denmark)

    Worm, Verner; Xu, Xiaojun; Shinha, Jai b.P.

    2005-01-01

    culture moderates the relationships between the forms of knowledge and internationalization of multinationals on one hand and the transfer of knowledge on the other. It is postulated that stable cultural frames of the Danes and Chinese managers, both having stable cultural frame, will require long drawn...

  10. Metacognition as a Moderator of Creative Ideation and Creative Production

    Science.gov (United States)

    Puryear, Jeb S.

    2015-01-01

    Recent theoretical work has called for exploration of the moderating effects of cognitive factors on the relationship between creative ideation and creative production. The Cognitive-Creative Sifting model suggests skills in processing and transforming information influence the association. This study used the Runco Ideational Behavior Scale,…

  11. The management of adults and children with moderate severity ...

    African Journals Online (AJOL)

    Moderate severity asthma occurs in approximately 10 to 15% of patients with chronic reversible airway obstruction and is de- fined by more than four daytime symptoms per week, more than four night time symptoms per month and peak expiratory flow rates of between 60 and 80% of predicted values. Currently ...

  12. A Mediated Moderation Model of Conformative Peer Bullying

    Science.gov (United States)

    Cho, Yoonju; Chung, Ock-Boon

    2012-01-01

    We investigated the relationship between conformative peer bullying and issues of peer conformity among adolescents. This relationship is examined through the establishment of a mediated moderation model for conformative peer bullying using structural equation modeling in a sample of 391 second-year middle school students in Seoul, South Korea. We…

  13. Moderation and Consistency of Teacher Judgement: Teachers' Views

    Science.gov (United States)

    Connolly, Stephen; Klenowski, Valentina; Wyatt-Smith, Claire Maree

    2012-01-01

    Major curriculum and assessment reforms in Australia have generated research interest in issues related to standards, teacher judgement and moderation. This article is based on one related inquiry of a large-scale Australian Research Council Linkage project conducted in Queensland. This qualitative study analysed interview data to identify…

  14. Empathy and Peer Violence among Adolescents: Moderation Effect of Gender

    Science.gov (United States)

    Bojana, Dinic M.; Jasmina, Kodžopeljic S.; Valentina, Sokolovska T.; Ilija, Milovanovic Z.

    2016-01-01

    The study examined the relationships between empathy and peer violence among adolescents, along with gender as a moderator in these associations. Thereby, multidimensionality of empathy (affective and cognitive empathy) and different forms of violence (physical, verbal, and relational) were considered. The participants were 646 high school…

  15. Kinetics of Pressurized Water Reactors with Hot or Cold Moderators

    Energy Technology Data Exchange (ETDEWEB)

    Norinder, O

    1960-11-15

    The set of neutron kinetic equations developed in this report permits the use of long integration steps during stepwise integration. Thermal relations which describe the transfer of heat from fuel to coolant are derived. The influence upon the kinetic behavior of the reactor of a number of parameters is studied. A comparison of the kinetic properties of the hot and cold moderators is given.

  16. Technical Evaluation Report. 54. Best Practices in Synchronous Conferencing Moderation

    Science.gov (United States)

    Anderson, Lynn; Fyvie, Barb; Koritko, Brenda; McCarthy, Kathy; Paz, Sonia Murillo; Rizzuto, Mary; Tremblay, Remi; Sawyers, Urel

    2006-01-01

    Practical guidelines are offered for the use of synchronous online conferencing software by session administrators and moderators. The configuration of the software prior to conferencing sessions is discussed, and the planning and implementation of useful collaborative activities such as "synchronised browsing." The combination of these…

  17. Gender Identification Moderates Social Identity Threat Effects on Working Memory

    Science.gov (United States)

    Kaiser, Cheryl R.; Hagiwara, Nao

    2011-01-01

    This investigation examined whether gender identification moderates women's working memory following exposure to situations that threaten the integrity of their gender group. Young adults read sentences that either threatened women's gender identity (in the social identity threat condition) or did not threaten this identity (in the control…

  18. Magnitude and correlates of moderate to severe anemia among ...

    African Journals Online (AJOL)

    Introduction: Moderate to severe anemia is an important clinical problem in HIV patients on Highly Active Antiretroviral Therapy. The rate of progression and mortality in this sub group of patients is high compared to non anemic patients. In sub Saharan Africa with scale up of Anti retroviral therapy, the magnitude of this ...

  19. "Rationality" as a Moderator Between Life Events and Illness.

    Science.gov (United States)

    Pekarik, Gene

    1986-01-01

    The author examined the theory of rational beliefs as a moderator between life events and illness using a sample of 283 college students. Results suggested that rationality functioned to prevent stress and illness when there were few stressors, but did not reduce the effect of high levels of life events. (Author/MT)

  20. An advanced cold moderator using solid methane pellets

    International Nuclear Information System (INIS)

    Foster, C.A.; Carpenter, J.M.

    2001-01-01

    This paper reports developments of the pellet formation and transport technologies required for producing a liquid helium or hydrogen cooled methane pellet moderator. The Phase I US DOE SBIR project, already completed, demonstrated the production of 3 mm transparent pellets of frozen methane and ammonia and transport of the pellets into a 40 cc observation cell cooled with liquid helium. The methane pellets, formed at 72 K, stuck together during the loading of the cell. Ammonia pellets did not stick and fell readily under vibration into a packed bed with a 60% fill fraction. A 60% fill fraction should produce a very significant increase in long-wavelength neutron production and advantages in shorter pulse widths as compared to a liquid hydrogen moderator. The work also demonstrated a method of rapidly changing the pellets in the moderator cell. The Phase II project, just now underway, will develop a full-scale pellet source and transport system with a 1.5 L 'moderator' cell. The Phase II effort will also produce an apparatus to sub-cool the methane pellets to below 20 K, which should prevent the methane pellets from sticking together. In addition to results of the phase I experiments, the presentation includes a short video of the pellets, and a description of plans for the Phase II project. (author)

  1. Modeling of high speed micro rotors in moderate flow confinement

    NARCIS (Netherlands)

    Dikmen, E.; van der Hoogt, Peter; Aarts, Ronald G.K.M.; Sas, P.; Bergen, B.

    2008-01-01

    The recent developments in high speed micro rotating machinery lead to the need for multiphysical modeling of the rotor and the surrounding medium. In this study, thermal and flow induced effects on rotor dynamics of geometries with moderate flow confinement are studied. The structure is modeled via

  2. Effective Literacy Instruction for Students with Moderate or Severe Disabilities

    Science.gov (United States)

    Copeland, Susan R.; Keefe, Elizabeth B.

    2007-01-01

    For students with moderate or severe disabilities, developing literacy skills is a critical component of successful communication, employment, and community participation. Finally, educators have a practical, concise guidebook for helping these students meet NCLB's academic standards for literacy. Appropriate for use in all settings, including…

  3. Moderating Poverty: The Role of Remittances from Migration in ...

    African Journals Online (AJOL)

    sulaiman.adebowale

    the remittances do not have a significant moderating effect on poverty in .... also indicates that migration is selective by access to wealth (Gubert 2002). Here, the ... lowest-income rural households received the most remittance because they .... observed, educated African women have considerable ability to remit materially.

  4. Biomineralization of carbonate and phosphate by moderately halophilic bacteria

    NARCIS (Netherlands)

    Sánchez-Román, Mónica; Rivadeneyra, Maria A.; Vasconcelos, Crisogono; McKenzie, Judith A.

    We investigated the precipitation of carbonate and phosphate minerals by 19 species of moderately halophilic bacteria using media with variable Mg 2+/Ca2+ ratios. The precipitated minerals were calcite, magnesium (Mg) calcite, and struvite (MgNH4PO4· 6H2O) in variable proportions depending on the

  5. Promoting moderate-vigorous physical activity in overweight minority girls

    Science.gov (United States)

    There is limited research on the types of activities that are most effective for promoting moderate-vigorous physical activity (MVPA) in children. The purpose of this study was to assess which types of activities elicit MVPA in overweight minority girls. The sample consisted of 31 overweight Latina ...

  6. Moderate and deep nurse-administered propofol sedation is safe

    DEFF Research Database (Denmark)

    Jensen, Jeppe Thue; Møller, Ann; Hornslet, Pernille

    2015-01-01

    INTRODUCTION: Non-anaesthesiologist-administered propofol sedation (NAPS/NAAP) is increasingly used in many countries. Most regimens aim for light or moderate sedation. Little evidence on safety of deep NAPS sedation is available. The aim of this study was to explore the safety of intermittent deep...

  7. Executive functions, parental punishment, and aggression: Direct and moderated relations.

    Science.gov (United States)

    Fatima, Shameem; Sharif, Imran

    2017-12-01

    The main focus of the current study was to assess whether executive functions (EFs) moderate the effect of parental punishment on adolescent aggression. The sample were 370 participants (53% girls, 47% boys) enrolled at secondary and higher secondary levels and ranged in age between 13-19 years (M = 15.5, SD = 1.3). Participants were assessed on a self-report measure of aggression and two punishment measures, in addition to a demographic sheet. Then, they were individually assessed on four tests taken from the Delis-Kaplan Executive Functions System (D-KEFS) namely Trial Making Test (TMT), Design Fluency Test (DFT), Color Word Interference Test (CWIT), and Card Sorting Test (CST) to assess cognitive flexibility, nonverbal fluency, inhibition, and problem-solving ability, respectively. Correlation coefficients indicated that all four executive functioning measures and the two punishment measures were significantly correlated with aggression. Moderation analysis indicated that all EFs moderated the relationship between physical punishment and aggression, and only inhibition and problem-solving ability, but not cognitive flexibility and nonverbal fluency, moderated the relations between symbolic punishment and aggression. The findings support the hypothesis that EFs are protective personal factors that promote healthy adolescent adjustment in the presence of challenging environmental factors.

  8. Personality as a moderator of context effects on academic achievement

    NARCIS (Netherlands)

    Hendriks, A.A.J.; Kuyper, H.; Lubbers, M.J; Van der Werf, M.P.C.

    We investigated whether personality moderates group influence of classmates on academic achievement and whether these so-called context effects can be attributed to peer pressure. The sample consisted of 2498 students in their first year of Dutch secondary education. The data were analyzed by a

  9. Personality as a Moderator of Context Effects on Academic Achievement

    Science.gov (United States)

    Hendriks, A. A. Jolijn; Kuyper, Hans; Lubbers, Miranda J.; Van der Werf, Margaretha P. C.

    2011-01-01

    We investigated whether personality moderates group influence of classmates on academic achievement and whether these so-called context effects can be attributed to peer pressure. The sample consisted of 2498 students in their first year of Dutch secondary education. The data were analyzed by a two-level (students within classes) analysis,…

  10. Effects of moderate static magnetic field presowing treatment on ...

    African Journals Online (AJOL)

    Improvement of seed performance by static magnetic field (SMF) constitutes a safe ecological way to substitute chemicals use. In laboratory conditions, we studied the effects of presowing seeds of two varieties of Raphanus sativus (Red: R.R, Red and White: R+W) by moderate SMF on seedlings' growth and oxidative status ...

  11. Family Functioning and Maladaptive Schemas: The Moderating Effects of Optimism

    Science.gov (United States)

    Buri, John R.; Gunty, Amy L.

    2008-01-01

    Authoritarian parenting is often shown to be associated with negative outcomes for children, including the development of maladaptive schemas. However, this is not the case for all children who experience Authoritarian parenting. Optimism is examined as a moderator in the relationship between Authoritarian parenting and maladaptive schemas that…

  12. Holland Type as a Moderator of Personality-Performance Predictions.

    Science.gov (United States)

    Fritzsche, Barbara A.; McIntire, Sandra A.; Yost, Amy Powell

    2002-01-01

    Data from 559 undergraduates provided modest evidence that Holland's taxonomy of work environments moderated the relationship between personality and performance. The traits of agreeableness and conscientiousness were better predictors of performance in certain environments. The important relationship between personality and performance may be…

  13. Personality Traits and Examination Anxiety: Moderating Role of Gender

    Science.gov (United States)

    Asghari, Arezou; Abdul.Kadir, Rusnani bte; Elias, Habibah bte; Baba, Maznah bte

    2013-01-01

    This study is aimed at examining the moderating effect of gender on the relationship between personality traits and state anxiety. The participants were 375 Iranian high school students (193 males and 182 females). The instruments used were the NEO-FFI-3 Inventory and State Anxiety Inventory. Results of the structural model showed that from the…

  14. Perfectionism Moderates Stereotype Threat Effects on STEM Majors' Academic Performance

    Science.gov (United States)

    Rice, Kenneth G.; Lopez, Frederick G.; Richardson, Clarissa M. E.; Stinson, Jennifer M.

    2013-01-01

    Using a randomized, between-subjects experimental design, we tested hypotheses that self-critical perfectionism would moderate the effects of subtle stereotype threat (ST) for women and students in underrepresented racial/ethnic groups who are pursuing traditional degrees in science, technology, engineering, or math (STEM). A diverse sample of…

  15. Characteristics of polyethylene-moderated 252Cf neutron sources

    International Nuclear Information System (INIS)

    Alejnikov, V.E.; Beskrovnaya, L.G.; Florko, B.V.

    2000-01-01

    Polyethylene-moderated 252 Cf neutron sources were designed to produce neutron reference fields' spectra that simulate the spectra observed in the workplaces within nuclear reactors and accelerators. The paper describes the neutron sources and fields. Neutron spectra were calculated by Monte Carlo method and compared with experimental data

  16. CHF considerations for highly moderated 100% MOX fuels PWRs

    Energy Technology Data Exchange (ETDEWEB)

    Saphier, D.; Raymond, P. [CEA Saclay, DMT/SERMA/LETR, Gif-sur-Yvette (France)

    1995-09-01

    A feasibility study on using 100% MOX fuel in a PWR with increased moderating ratio, RMA, was initiated. In the proposed design all the parameters were chosen identical to the French 1450MW PWR, except the fuel pin diameter which was reduced to achieve higher moderating ratios, V{sub M}/V{sub F}, where V{sub M} and V{sub F} are the moderator and fuel volume respectively. Moderating ratios from 2 to 4 were considered. In the present study the thermal-hydraulic feasibility of using fuel assemblies with smaller diameter fuel pins was investigated. The major design constrain in this study was the critical heat flux (CHF). In order to maintain the fuel pin integrity under nominal operating and transient conditions, the minimum DNBR, (Departure from Nucleate Boiling Ratio given by CHF/q{close_quotes}{sub local}, where q{close_quotes}{sub local} is the local heat flux), has to be above a given value. The limitations of the existing CHF correlations for the present study are outlined. Two designs based on the conventional 17x17 fuel assembly and on the advanced 19x19 assembly meeting the MDNBR criteria and satisfying the control margin requirements, are proposed.

  17. Assessment Moderation: Constructing the Marks and Constructing the Students

    Science.gov (United States)

    Orr, Susan

    2007-01-01

    In this paper the author considers the positivist approaches in mainstream higher education assessment research. She contrasts this to emerging poststructuralist perspectives and goes on to report on a study into the assessment moderation practices in a higher education art department. In this research she explores the ways in which art and design…

  18. Moderators influencing the effectiveness of a behavioral teacher program

    NARCIS (Netherlands)

    Veenman, Betty; Luman, Marjolein; Oosterlaan, Jaap

    2018-01-01

    Objective: This study assessed which moderators influenced the effectiveness of a low-intensive behavioral teacher program for children with symptoms of Attention-Deficit/Hyperactivity Disorder (ADHD). Methods: Primary school children (N = 114) with ADHD symptoms in the classroom were randomly

  19. Moderate alcohol consumption and waiting time to pregnancy

    DEFF Research Database (Denmark)

    Juhl, Mette; Andersen, Anne-Marie Nybo; Grønbaek, Morten

    2001-01-01

    BACKGROUND: Recent research indicates that even a moderate consumption of alcohol in women trying to become pregnant is associated with longer waiting time to pregnancy. The findings, though, are based upon few observations. METHODS: Self-reported data on alcohol intake and waiting time to pregna...

  20. Testing Moderator and Mediator Effects in Counseling Psychology Research

    Science.gov (United States)

    Frazier, Patricia A.; Tix, Andrew P.; Barron, Kenneth E.

    2004-01-01

    The goals of this article are to (a) describe differences between moderator and mediator effects; (b) provide nontechnical descriptions of how to examine each type of effect, including study design, analysis, and interpretation of results; (c) demonstrate how to analyze each type of effect; and (d) provide suggestions for further reading. The…

  1. Optimization of moderators and beam extraction at the ESS

    DEFF Research Database (Denmark)

    Holst Andersen, Ken; Bertelsen, Mads; Zanini, Luca

    2018-01-01

    , beamport configuration and instrument performance. All instruments are served by a single moderator assembly above the target, arranged in a `butterfly' geometry with a height of 3cm. This was determined to be the optimal height for trade-off between high brightness and efficient guide illumination...

  2. The Moderating Role of Cultural Similarity in Leadership Training Effectiveness

    Science.gov (United States)

    Xu, Qiumei Jane; Jiang, Jianfeng

    2010-01-01

    Purpose: This paper aims to examine the moderating role of cultural similarity between leaders and followers on leadership training effectiveness in terms of followers' fairness perception and organizational citizenship behavior. Design/methodology/approach: A quasi-experiment was conducted with 40 managers from international corporations as the…

  3. QT interval changes in term pregnant women living at moderately ...

    African Journals Online (AJOL)

    Objective: This study aimed to compare the QT interval changes in women with term pregnancy living at moderately high altitude (1890 m in Erzurum, Turkey) with those of women living at sea level (31 m in İstanbul, Turkey). Materials and Methods: One‑hundred ten women (n = 55, for each group) with full‑term and single ...

  4. Emotions and Multimedia Learning: The Moderating Role of Learner Characteristics

    Science.gov (United States)

    Knörzer, L.; Brünken, R.; Park, B.

    2016-01-01

    The Cognitive-Affective Theory of Learning with Media postulates that affective factors as well as individual learner characteristics impact multimedia learning. The present study investigated how experimentally induced positive and negative emotions influence multimedia learning and how learner characteristics moderated this impact. Results…

  5. Posttraumatic Growth Moderates Suicide Risk among Trauma Exposed Undergraduates

    Science.gov (United States)

    Sheline, Kelly T.; Rosén, Lee A.

    2017-01-01

    We assessed the moderating role of posttraumatic growth on the relationship between traumatic life events and suicidal ideation and behavior, suicide risk, and college adjustment. The sample of 557 college students completed questionnaires measuring their severity and number of traumatic life events, posttraumatic growth, suicidal thoughts,…

  6. Efficacy of nebulized furosemide in children with moderate attack of ...

    African Journals Online (AJOL)

    Efficacy of nebulized furosemide in children with moderate attack of asthma. M Alshehri, T Almegamesi, A Alfrayh. Abstract. No Abstract. West African Journal of Medicine Vol. 24(3) 2005: 246-251. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT.

  7. Alcohol Use: If You Drink, Keep It Moderate

    Science.gov (United States)

    ... drink include: Beer: 12 fluid ounces (355 milliliters) Wine: 5 fluid ounces (148 milliliters) Distilled spirits (80 proof): 1.5 fluid ounces (44 milliliters) Moderate alcohol use may be of most benefit if you have existing risk factors for heart ...

  8. Private Speech Moderates the Effects of Effortful Control on Emotionality

    Science.gov (United States)

    Day, Kimberly L.; Smith, Cynthia L.; Neal, Amy; Dunsmore, Julie C.

    2018-01-01

    Research Findings: In addition to being a regulatory strategy, children's private speech may enhance or interfere with their effortful control used to regulate emotion. The goal of the current study was to investigate whether children's private speech during a selective attention task moderated the relations of their effortful control to their…

  9. Moderation of distress-induced eating by emotional eating scores

    NARCIS (Netherlands)

    van Strien, T.; Herman, C.P.; Anschutz, D.J.; Engels, R.C.M.E.; de Weerth, C.

    2012-01-01

    Earlier studies assessing the possible moderator effect of self-reported emotional eating on the relation between stress and actual food intake have obtained mixed results. The null findings in some of these studies might be attributed to misclassification of participants due to the use of the

  10. A Behavioral Weight Reduction Model for Moderately Mentally Retarded Adolescents.

    Science.gov (United States)

    Rotatori, Anthony F.; And Others

    1980-01-01

    A behavioral weight reduction treatment and maintenance program for moderately mentally retarded adolescents which involves six phases from background information collection to followup relies on stimulus control procedures to modify eating behaviors. Data from pilot studies show an average weekly weight loss of .5 to 1 pound per S. (CL)

  11. Stock price reactions to brand value announcements : Magnitude and moderators

    NARCIS (Netherlands)

    Dutordoir, Marie; Verbeeten, Frank H M|info:eu-repo/dai/nl/216537568; De Beijer, Dominique

    2015-01-01

    While several studies find a positive impact of brand value on firm value, we still know very little on the variables moderating the brand value-firm value relation. In this study, we address this gap in the literature by developing and testing a new framework on the contingencies affecting the

  12. Stock price reactions to brand value announcements: Magnitude and moderators

    NARCIS (Netherlands)

    Dutordoir, M.; Verbeeten, F.H.M.; de Beijer, D.

    2015-01-01

    While several studies find a positive impact of brand value on firm value, we still know very little on the variables moderating the brand value-firm value relation. In this study, we address this gap in the literature by developing and testing a new framework on the contingencies affecting the

  13. Management of mild to moderate acne vulgaris | Malahlela | South ...

    African Journals Online (AJOL)

    Acne is a chronic inflammatory disease of the pilosebaceous units. It is the most common diagnosis in dermatology and regularly affects adolescents and young adults. Acne can be mild, moderate or severe. Treatment includes topical keratolytics, topical retinoids, antibiotics, hormonal therapy and systemic retinoids in ...

  14. Moderate malnutrition: do we know how to manage it?

    African Journals Online (AJOL)

    Angel_D

    There are no recent international guidelines for the management of moderate malnutrition in spite of the fact that it: ▫ Increases the risk of death from common diseases and may result in severe acute malnutrition and/or severe stunting (both life- threatening conditions). ▫ Is likely to be associated with more nutrition-.

  15. Review of the Safety Concern Related to CANDU Moderator Temperature Distribution and Status of KAERI Moderator Circulation Test (MCT) Experiments

    Energy Technology Data Exchange (ETDEWEB)

    Rhee, Bo W.; Kim, Hyoung T. [Severe Accident and PHWR Safety Research Division, Daejeon (Korea, Republic of); Kim, Tongbeum [University of the Witwatersrand, Johannesburg (South Africa); Im, Sunghyuk [KAIST, Daejeon (Korea, Republic of)

    2015-10-15

    Following a large break LOCA and before Emergency Coolant Injection (ECI) initiation, pressure tubes (PT) significantly heat up as a result of the initial power pulse and degraded coolant flow. Consequently, some pressure tubes balloon and come into contact with the calandria tubes (CT). Following the PT/CT contact, the pressure tubes cool as they transfer some of the absorbed heat to the moderator via conduction at contact locations. As long as sustained calandria tube dryout does not occur, the calandria tube surface temperature remains below the creep threshold temperature and no further deformation is expected. Consequently, a sufficient condition to ensure fuel channel integrity following a large LOCA, is the avoidance of sustained calandria tubes dryout. If the moderator available subcooling at the onset of a large LOCA is greater than the subcooling requirements, a sustained calandria tube dryout is avoided. The subcooling requirements are determined from a set of experiments known as fuel channel contact experiments. The difference between available subcooling and required subcooling is called subcooling margins. The moderator flow circulation patterns are complicated slow flows that significantly vary from buoyancy dominated to inertia dominated patterns. Accurate predictions of flow patterns are essential for accurate calculation of moderator temperature distributions and the related moderator subcooling. Following a large break LOCA and before Emergency Coolant Injection (ECI) initiation, pressure tubes (PT) significantly heat up as a result of the initial power pulse and degraded coolant flow. Consequently, some pressure tubes balloon and come into contact with the calandria tubes (CT). Following the PT/CT contact, the pressure tubes cool as they transfer some of the absorbed heat to the moderator via conduction at contact locations. As long as sustained calandria tube dryout does not occur, the calandria tube surface temperature remains below the creep

  16. Psychosocial Pain Management Moderation: The Limit, Activate, and Enhance Model.

    Science.gov (United States)

    Day, Melissa A; Ehde, Dawn M; Jensen, Mark P

    2015-10-01

    There is a growing emphasis in the pain literature on understanding the following second-order research questions: Why do psychosocial pain treatments work? For whom do various treatments work? This critical review summarizes research that addresses the latter question and proposes a moderation model to help guide future research. A theoretical moderation framework for matching individuals to specific psychosocial pain interventions has been lacking. However, several such frameworks have been proposed in the broad psychotherapy and implementation science literature. Drawing on these theories and adapting them specifically for psychosocial pain treatment, here we propose a Limit, Activate, and Enhance model of pain treatment moderation. This model is unique in that it includes algorithms not only for matching treatments on the basis of patient weaknesses but also for directing patients to interventions that build on their strengths. Critically, this model provides a basis for specific a priori hypothesis generation, and a selection of the possible hypotheses drawn from the model are proposed and discussed. Future research considerations are presented that could refine and expand the model based on theoretically driven empirical evidence. The Limit, Activate, and Enhance model presented here is a theoretically derived framework that provides an a priori basis for hypothesis generation regarding psychosocial pain treatment moderators. The model will advance moderation research via its unique focus on matching patients to specific treatments that (1) limit maladaptive responses, (2) activate adaptive responses, and (3) enhance treatment outcomes based on patient strengths and resources. Copyright © 2015 American Pain Society. Published by Elsevier Inc. All rights reserved.

  17. Moderate Load Eccentric Exercise; A Distinct Novel Training Modality

    Science.gov (United States)

    Hoppeler, Hans

    2016-01-01

    Over the last 20 years a number of studies have been published using progressive eccentric exercise protocols on motorized ergometers or similar devices that allow for controlled application of eccentric loads. Exercise protocols ramp eccentric loads over an initial 3 weeks period in order to prevent muscle damage and delayed onset muscle soreness. Final training loads reach 400–500 W in rehabilitative settings and over 1200 W in elite athletes. Training is typically carried out three times per week for durations of 20–30 min. This type of training has been characterizes as moderate load eccentric exercise. It has also been denoted RENEW (Resistance Exercise via Negative Eccentric Work by LaStayo et al., 2014). It is distinct from plyometric exercises (i.e., drop jumps) that impose muscle loads of several thousand Watts on muscles and tendons. It is also distinct from eccentric overload training whereby loads in a conventional strength training setting are increased in the eccentric phase of the movement to match concentric loads. Moderate load eccentric exercise (or RENEW) has been shown to be similarly effective as conventional strength training in increasing muscle strength and muscle volume. However, as carried out at higher angular velocities of joint movement, it reduces joint loads. A hallmark of moderate load eccentric exercise is the fact that the energy requirements are typically 4-fold smaller than in concentric exercise of the same load. This makes moderate load eccentric exercise training the tool of choice in medical conditions with limitations in muscle energy supply. The use and effectiveness of moderate load eccentric exercise has been demonstrated mostly in small scale studies for cardiorespiratory conditions, sarcopenia of old age, cancer, diabetes type 2, and neurological conditions. It has also been used effectively in the prevention and rehabilitation of injuries of the locomotor system in particular the rehabilitation after anterior

  18. Effects of Weather on Tourism and its Moderation

    Science.gov (United States)

    Park, J. H.; Kim, S.; Lee, D. K.

    2016-12-01

    Tourism is weather sensitive industry (Gómez Martín, 2005). As climate change has been intensifying, the concerns about negative effects of weather on tourism also have been increasing. This study attempted to find ways that mitigate the negative effects from weather on tourism, by analyzing a path of the effects of weather on intention to revisit and its moderation. The data of the study were collected by a self-recording online questionnaire survey of South Korean domestic tourists during August 2015, and 2,412 samples were gathered. A path model of effects of weather on intention to revisit that including moderating effects from physical attraction satisfaction and service satisfaction was ran. Season was controlled in the path model. The model fit was adequate (CMIN/DF=2.372(p=.000), CFI=.974, RMSEA=.024, SRMR=0.040), and the Model Comparison, which assumes that the base model to be correct with season constrained model, showed that there was a seasonal differences in the model ( DF=24, CMIN=32.430, P=.117). By the analysis, it was figured out that weather and weather expectation affected weather satisfaction, and the weather satisfaction affected intention to revisit (spring/fall: .167**, summer: .104**, and winter: .114**). Meanwhile physical attraction satisfaction (.200**), and service satisfaction (.210**) of tourism positively moderated weather satisfaction in summer, and weather satisfaction positively moderated physical attraction (.238**) satisfaction and service satisfaction (.339**). In other words, in summer, dissatisfaction from hot weather was moderated by satisfaction from physical attractions and services, and in spring/fall, comfort weather conditions promoted tourists to accept tourism experience and be satisfied from attractions and services positively. Based on the result, it was expected that if industries focus on offering the good attractions and services based on weather conditions, there would be positive effects to alleviate tourists

  19. Conceptual design of a cold methane moderator system for the European Spallation Source (ESS)

    CERN Document Server

    Barnert-Wiemer, H

    2002-01-01

    As part of the work for the target station of the planned European spallation source (ESS) the Central Department of Technology at the Forschungszentrum Juelich GmbH is also concerned with the moderators, particular attention being given to the development of cold methane moderators. This report discusses the technical feasibility of solid methane moderators. Methods to tailor the neutron output by adding absorption materials (decouplers or poisons) are not considered here, neither are composite moderators. Based on the given target-moderator-reflector assembly of the ESS project a concept for the ESS cold methane moderators has been developed and is being examined at the Forschungszentrum Juelich. According to this moderator concept the moderator is a fixed bed of small spheres, which makes moderator container filling homogeneous and reproducible. Since spheres form a defined packed bed, cooling of the moderator bed by H sub 2 is reliable. The process of filling the moderator container and of removing the pe...

  20. Only minor additional metabolic health benefits of high as opposed to moderate dose physical exercise in young, moderately overweight men.

    Science.gov (United States)

    Reichkendler, M H; Rosenkilde, M; Auerbach, P L; Agerschou, J; Nielsen, M B; Kjaer, A; Hoejgaard, L; Sjödin, A; Ploug, T; Stallknecht, B

    2014-05-01

    The dose-response effects of exercise training on insulin sensitivity, metabolic risk, and quality of life were examined. Sixty-one healthy, sedentary (VO₂max: 35 ± 5 ml/kg/min), moderately overweight (BMI: 27.9 ± 1.8), young (age: 29 ± 6 years) men were randomized to sedentary living (sedentary control group; n = 18), moderate (moderate dose training group [MOD]: 300 kcal/day, n = 21), or high (high dose training group [HIGH]: 600 kcal/day, n = 22) dose physical exercise for 11 weeks. The return rate for post-intervention testing was 82-94% across groups. Weekly exercise amounted to 2,004 ± 24 and 3,774 ± 68 kcal, respectively, in MOD and HIGH. Cardiorespiratory fitness increased (P exercise groups (MOD: 32 ± 1 to 29 ± 1%; HIGH: 30 ± 1 to 27 ± 1%). Peripheral insulin sensitivity increased (P benefits were found when exercising ∼3,800 as opposed to ∼2,000 kcal/week in young moderately overweight men. This finding may have important public health implications. Copyright © 2012 The Obesity Society.

  1. Only minor additional metabolic health benefits of high as opposed to moderate dose physical exercise in young, moderately overweight men

    DEFF Research Database (Denmark)

    Reichkendler, M H; Larsen, Mads Rosenkilde; Auerbach, P L

    2014-01-01

    % in HIGH (P health assessed by questionnaire increased similarly in MOD (P additional health benefits were found when exercising ∼3,800 as opposed to ∼2,000 kcal/week in young moderately overweight men. This finding may have important...... public health implications....

  2. OpenFOAM Analysis of CANDU-6 Moderator Flow

    International Nuclear Information System (INIS)

    Kim, Hyoung Tae; Chang, Se-Myong

    2015-01-01

    In this study OpenFOAM (Open Field Operation and Manipulation), an open source CFD solver, is used to simulate the three-dimensional moderator flow in calandria tank of CANDU-6 reactor improving the computational efficiency by parallel computing which does not need any proprietary license. A prototype of CANDU-6 reactor is numerically analyzed about three-dimensional moderator flow in calandrian tank with OpenFOAM, an open source CFD code. The horizontal fuel channels in a CANDU-6 reactor (a pressurized heavy water reactor) are submerged in the heavy water (D 2 O) pool which is contained by a cylindrical tank, calandria. Each fuel channel consists of concentric tubes: a Pressure Tube (PT) and a Calandria Tube (CT). And the CO 2 gas is filled between these tubes. Consequently, a heat flux is rapidly transferred to the outer CT so that a film boiling may occur in CT. As a result, it is important to keep the subcooling in the moderator. It is one of the major concerns in the CANDU safety analyses to estimate the local subcooling margin of the moderator inside the calandria tank. Previous experimental studies showed that the film boiling would be unlikely to occur if the local moderator subcooling is sufficient. Therefore, an accurate prediction of the moderator temperature distribution in the calandria tank is needed to confirm the channel integrity. There have been numerous computational efforts to estimate the thermal hydraulics in the calandria tank using CFD codes. Hadaller et al. obtained a tube bank pressure drop model for tube bundle region of the calandria tank and implemented it into the MODTURC C LAS code. Yoon et al. used the CFX code to develop a CFD model with a porous media approach for the core region. However, it is known that porous media modeling provide only average values of flow velocities and temperatures and do not give any information about local flow variables near tube solid walls, which are necessary to implement accurate heat transfer

  3. OpenFOAM Analysis of CANDU-6 Moderator Flow

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyoung Tae [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of); Chang, Se-Myong [Kunsan National University, Gunsan (Korea, Republic of)

    2015-10-15

    In this study OpenFOAM (Open Field Operation and Manipulation), an open source CFD solver, is used to simulate the three-dimensional moderator flow in calandria tank of CANDU-6 reactor improving the computational efficiency by parallel computing which does not need any proprietary license. A prototype of CANDU-6 reactor is numerically analyzed about three-dimensional moderator flow in calandrian tank with OpenFOAM, an open source CFD code. The horizontal fuel channels in a CANDU-6 reactor (a pressurized heavy water reactor) are submerged in the heavy water (D{sub 2}O) pool which is contained by a cylindrical tank, calandria. Each fuel channel consists of concentric tubes: a Pressure Tube (PT) and a Calandria Tube (CT). And the CO{sub 2} gas is filled between these tubes. Consequently, a heat flux is rapidly transferred to the outer CT so that a film boiling may occur in CT. As a result, it is important to keep the subcooling in the moderator. It is one of the major concerns in the CANDU safety analyses to estimate the local subcooling margin of the moderator inside the calandria tank. Previous experimental studies showed that the film boiling would be unlikely to occur if the local moderator subcooling is sufficient. Therefore, an accurate prediction of the moderator temperature distribution in the calandria tank is needed to confirm the channel integrity. There have been numerous computational efforts to estimate the thermal hydraulics in the calandria tank using CFD codes. Hadaller et al. obtained a tube bank pressure drop model for tube bundle region of the calandria tank and implemented it into the MODTURC{sub C}LAS code. Yoon et al. used the CFX code to develop a CFD model with a porous media approach for the core region. However, it is known that porous media modeling provide only average values of flow velocities and temperatures and do not give any information about local flow variables near tube solid walls, which are necessary to implement accurate heat

  4. Moderation and Assessment Project--South West. A Presentation of a Model for Moderating Pupils' Work That Is Teacher Assessed, Developed in England, UK.

    Science.gov (United States)

    Radnor, Hilary

    The Moderation and Assessment Project, South West, was an outgrowth of the Technical and Vocational Educational Initiative of the government of the United Kingdom that attempted to develop more courses with vocational relevance for adolescents. Growing from research projects under the Moderation and Assessment project, a new model of moderation is…

  5. Stimulus Modality and Smoking Behavior: Moderating Role of Implicit Attitudes.

    Science.gov (United States)

    Ezeh, Valentine C; Mefoh, Philip

    2015-07-20

    This study investigated whether stimulus modality influences smoking behavior among smokers in South Eastern Nigeria and also whether implicit attitudes moderate the relationship between stimulus modality and smoking behavior. 60 undergraduate students of University of Nigeria, Nsukka were used. Participants were individually administered the IAT task as a measure of implicit attitude toward smoking and randomly assigned into either image condition that paired images of cigarette with aversive images of potential health consequences or text condition that paired images of cigarette with aversive texts of potential health consequences. A one- predictor and one-moderator binary logistic analysis indicates that stimulus modality significantly predicts smoking behavior (p = smoke with greater probability than the text condition. The interaction between stimulus modality and IAT scores was also significant (p = attitudes towards smoking. The finding shows the urgent need to introduce the use of aversive images of potential health consequences on cigarette packs in Nigeria.

  6. Hypoxic cell radiosensitization by moderate hyperthermia and glucose deprivation

    International Nuclear Information System (INIS)

    Kim, J.H.; Kim, S.H.; Hahn, E.W.

    1983-01-01

    Cell culture studies were carried out to determine whether moderate hyperthermia reduces the oxygen enhancement ratio of cells under well-defined cultural conditions. Using asynchronously growing HeLa cells, the OER of cells with and without glucose was determined following exposure of cells to moderate hyperthermia, 40.5omicronC for 1 hr, immediately after X irradiation. The OER of cells with 5 mM glucose was 3.2, whereas the OER of glucose-deprived cells was reduced to 2.0. The pH of the cell culture medium was kept at 7.4 throughtout the experiments. The present finding may provide a clue toward further enhancing the radiosensitization of hypoxic cells by heat

  7. Hypoxic cell radiosensitization by moderate hyperthermia and glucose deprivation

    International Nuclear Information System (INIS)

    Kim, J.H.; Kim, S.H.; Hahn, E.W.

    1983-01-01

    Cell culture studies were carried out to determine whether moderate hyperthermia reduces the oxygen enhancement ratio of cells under well-defined cultural conditions. Using asynchronously growing HeLa cells, the OER of cells with and without glucose was determined following exposure of cells to moderate hyperthermia, 40.5 degrees C for 1 hr, immediately after X irradiation. The OER of cells with 5 mM glucose was 3.2, whereas the OER of glucose-deprived cells was reduced to 2.0. The pH of the cell culture medium was kept at 7.4 throughout the experiments. The present finding may provide a clue toward further enhancing the radiosensitization of hypoxic cells by heat

  8. Description of the moderator systems for the ESS project

    International Nuclear Information System (INIS)

    Stendal, K.

    1996-10-01

    This paper describes a suggestion for the arrangement of the Cold Neutron Sources for the two targets in the ESS project. (European Spallation Source). The suggestion is based upon the technique of the existing cold neutron sources at Risoe in Denmark, HMI and Geestacht in Germany. As moderating media all of them use H 2 in supercritical condition, circulated by blowers, and the safety of the systems is based upon the triple-containment philosophy. This seems to be the most convenient principle to use near the ESS targets, as it provides a larger degree of freedom with respect to the arrangement of these sources and pipe connections to the chambers, especially because the space is limited and access to the target is relatively complicated. The moderator chambers have been designed by KFA, Juelich and the rest of the arrangement by Risoe, DK. The price calculations used for the ESS project are based upon this arrangement. (au)

  9. Study on core design for reduced-moderation water reactors

    International Nuclear Information System (INIS)

    Okubo, Tsutomu

    2002-01-01

    The Reduced-Moderation Water Reactor (RMWR) is a water-cooled reactor with the harder neutron spectrum comparing with the LWR, resulting from low neutron moderation due to reduced water volume fraction. Based on the difference from the spectrum from the LWR, the conversion from U-238 to Pu-239 is promoted and the new cores preferable to effective utilization of uranium resource can be possible Design study of the RMWR core started in 1997 and new four core concepts (three BWR cores and one PWR core) are recently evaluated in terms of control rod worths, plutonium multiple recycle, high burnup and void coefficient. Comparative evaluations show needed incorporation of control rod programming and simplified PUREX process as well as development of new fuel cans for high burnup of 100 GW-d/t. Final choice of design specifications will be made at the next step aiming at realization of the RMWR. (T. Tanaka)

  10. Job characteristics, flow, and performance: the moderating role of conscientiousness.

    Science.gov (United States)

    Demerouti, Evangelia

    2006-07-01

    The present article aims to show the importance of positive work-related experiences within occupational health psychology by examining the relationship between flow at work (i.e., absorption, work enjoyment, and intrinsic work motivation) and job performance. On the basis of the literature, it was hypothesized that (a) motivating job characteristics are positively related to flow at work and (b) conscientiousness moderates the relationship between flow and other ratings of (in-role and out-of-role) performance. The hypotheses were tested on a sample of 113 employees from several occupations. Results of moderated structural equation modeling analyses generally supported the hypotheses. Motivating job characteristics were predictive of flow, and flow predicted in-role and extra-role performance, for only conscientious employees.

  11. Multigroup Moderation Test in Generalized Structured Component Analysis

    Directory of Open Access Journals (Sweden)

    Angga Dwi Mulyanto

    2016-05-01

    Full Text Available Generalized Structured Component Analysis (GSCA is an alternative method in structural modeling using alternating least squares. GSCA can be used for the complex analysis including multigroup. GSCA can be run with a free software called GeSCA, but in GeSCA there is no multigroup moderation test to compare the effect between groups. In this research we propose to use the T test in PLS for testing moderation Multigroup on GSCA. T test only requires sample size, estimate path coefficient, and standard error of each group that are already available on the output of GeSCA and the formula is simple so the user does not need a long time for analysis.

  12. Moderate Dilution of Copper Slag by Natural Gas

    Science.gov (United States)

    Zhang, Bao-jing; Zhang, Ting-an; Niu, Li-ping; Liu, Nan-song; Dou, Zhi-he; Li, Zhi-qiang

    2018-01-01

    To enable use of copper slag and extract the maximum value from the contained copper, an innovative method of reducing moderately diluted slag to smelt copper-containing antibacterial stainless steel is proposed. This work focused on moderate dilution of copper slag using natural gas. The thermodynamics of copper slag dilution and ternary phase diagrams of the slag system were calculated. The effects of blowing time, temperature, matte settling time, and calcium oxide addition were investigated. The optimum reaction conditions were identified to be blowing time of 20 min, reaction temperature of 1250°C, settling time of 60 min, CaO addition of 4% of mass of slag, natural gas flow rate of 80 mL/min, and outlet pressure of 0.1 MPa. Under these conditions, the Fe3O4 and copper contents of the residue were 7.36% and 0.50%, respectively.

  13. Moderate alcohol consumption and waiting time to pregnancy

    DEFF Research Database (Denmark)

    Juhl, Mette; Andersen, Anne-Marie Nybo; Grønbæk, Morten

    2001-01-01

    BACKGROUND: Recent research indicates that even a moderate consumption of alcohol in women trying to become pregnant is associated with longer waiting time to pregnancy. The findings, though, are based upon few observations. METHODS: Self-reported data on alcohol intake and waiting time...... to pregnancy (0-2, 3-5, 6-12 and >12 months) was used for 39 612 pregnant women, recruited to the Danish National Birth Cohort within the first 24 weeks of pregnancy from 1997 to 2000. Main outcome measures were odds ratios (OR) for a prolonged waiting time to pregnancy according to alcohol intake. RESULTS......: In nulliparous women neither moderate nor high alcohol intake was related with longer waiting time to pregnancy compared with a low intake. In parous women, a modest association was seen only among those with an intake of >14 drinks per week (subfecundity OR 1.3; 95% confidence interval 1.0-1.7). Women who...

  14. Bruce unit 1 moderator to end shield cooling leak repairs

    Energy Technology Data Exchange (ETDEWEB)

    Boucher, P; Ashton, A [Ontario Hydro, Tiverton, ON (Canada). Bruce Nuclear Generating Station-A

    1996-12-31

    In October 1994, a leak developed between the heavy water Moderator System and the light water End Shield Cooling System at Ontario Hydro`s Bruce A Generating Station Unit 1. The interface between these two systems consists of numerous reactor components all within the reactor vessel. This paper describes the initial discovery and determination of the leak source. The techniques used to pinpoint the leak location are described. The repair strategies and details are outlined. Flushing and refilling of the Moderator system are discussed. The current status of the Unit 1 End Shield Cooling System is given with possible remedial measures for clean-up. Recommendations and observations are provided for future references. (author). 7 figs.

  15. Working group on a database for cold moderators

    International Nuclear Information System (INIS)

    Broome, T. A.

    1997-09-01

    The working group meeting was chaired by Broome. The working group was charged with the task: Gather a table of neutronic performance known for specific designs; operational, test, theoretical/calculated. Set up generation of a (very briefly) annotated bibliography on this topic. A joint meeting with the Working Group on Moderator Performance Measurements was held to define the data on cold moderators which should be contained in the data base. It became clear that there exists only a small amount of data in very different forms much of it incomplete in its detail. So, rather than spending time collating existing data, it was considered to be more generally profitable to concentrate on the specification of the database and its implementation. The aim was to propose a system which could start quickly and simply yet be capable of extension and development in the future. The system was outlined in the summary session of the workshop and agreed by the participants.

  16. Neutrons moderation theory; Theorie du ralentissement des neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Vigier, J P

    1949-07-01

    This report gives a summarized presentation of the theory of fast neutrons diffusion and moderation in a given environment as elaborated by M. Langevin, E. Fermi, R. Marshak and others. This statistical theory is based on three assumptions: there is no inelastic diffusion, the elastic diffusion has a spherical symmetry with respect to the center of gravity of the neutron-nucleus system (s-scattering), and the effects of chemical bonds and thermal agitation of nuclei are neglected. The first chapter analyzes the Boltzmann equation of moderation, its first approximate solution (age-velocity equation) and its domain of validity, the extension of the age-velocity theory (general solution) and the boundary conditions, the upper order approximation (spherical harmonics method and Laplace transformation), the asymptotic solutions, and the theory of spatial momenta. The second chapter analyzes the energy distribution of delayed neutrons (stationary and non-stationary cases). (J.S.)

  17. Moderate Deviation Analysis for Classical Communication over Quantum Channels

    Science.gov (United States)

    Chubb, Christopher T.; Tan, Vincent Y. F.; Tomamichel, Marco

    2017-11-01

    We analyse families of codes for classical data transmission over quantum channels that have both a vanishing probability of error and a code rate approaching capacity as the code length increases. To characterise the fundamental tradeoff between decoding error, code rate and code length for such codes we introduce a quantum generalisation of the moderate deviation analysis proposed by Altŭg and Wagner as well as Polyanskiy and Verdú. We derive such a tradeoff for classical-quantum (as well as image-additive) channels in terms of the channel capacity and the channel dispersion, giving further evidence that the latter quantity characterises the necessary backoff from capacity when transmitting finite blocks of classical data. To derive these results we also study asymmetric binary quantum hypothesis testing in the moderate deviations regime. Due to the central importance of the latter task, we expect that our techniques will find further applications in the analysis of other quantum information processing tasks.

  18. Study on core design for reduced-moderation water reactors

    Energy Technology Data Exchange (ETDEWEB)

    Okubo, Tsutomu [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    2002-12-01

    The Reduced-Moderation Water Reactor (RMWR) is a water-cooled reactor with the harder neutron spectrum comparing with the LWR, resulting from low neutron moderation due to reduced water volume fraction. Based on the difference from the spectrum from the LWR, the conversion from U-238 to Pu-239 is promoted and the new cores preferable to effective utilization of uranium resource can be possible Design study of the RMWR core started in 1997 and new four core concepts (three BWR cores and one PWR core) are recently evaluated in terms of control rod worths, plutonium multiple recycle, high burnup and void coefficient. Comparative evaluations show needed incorporation of control rod programming and simplified PUREX process as well as development of new fuel cans for high burnup of 100 GW-d/t. Final choice of design specifications will be made at the next step aiming at realization of the RMWR. (T. Tanaka)

  19. Is Customer Orientation of Employees Sustainable? A Moderated Mediation Analysis

    Directory of Open Access Journals (Sweden)

    Junya Cai

    2017-07-01

    Full Text Available While existing literature has addressed the benefits of customer orientation, less is known about its negative outcomes. This study investigates the mediating effect of emotional dissonance on the relationship between customer orientation and unethical decision-making, and whether this mediating effect is moderated by occupation. A sample of 727 doctors and nurses from three Chinese hospitals completed anonymous questionnaires regarding customer orientation, emotional dissonance, and unethical decision-making. Our findings reveal that the positive relationship between customer orientation and unethical decision-making is fully mediated by emotional dissonance. Furthermore, the mediating effect of emotional dissonance is moderated by occupation, which suggests that the mediating effect of emotional dissonance is stronger for doctors. This study contributes to our understanding of how and for whom customer orientation results in unethical decision-making, and suggests the need to take occupation into account in preventing the negative outcomes of customer orientation.

  20. Description of the moderator systems for the ESS project

    Energy Technology Data Exchange (ETDEWEB)

    Stendal, K.

    1996-10-01

    This paper describes a suggestion for the arrangement of the Cold Neutron Sources for the two targets in the ESS project. (European Spallation Source). The suggestion is based upon the technique of the existing cold neutron sources at Risoe in Denmark, HMI and Geestacht in Germany. As moderating media all of them use H{sub 2} in supercritical condition, circulated by blowers, and the safety of the systems is based upon the triple-containment philosophy. This seems to be the most convenient principle to use near the ESS targets, as it provides a larger degree of freedom with respect to the arrangement of these sources and pipe connections to the chambers, especially because the space is limited and access to the target is relatively complicated. The moderator chambers have been designed by KFA, Juelich and the rest of the arrangement by Risoe, DK. The price calculations used for the ESS project are based upon this arrangement. (au).