Letter from Thomas Moran to Ferdinand Hayden and Paintings by Thomas Moran

Science.gov (United States)

Potter, Lee Ann; Eder, Elizabeth K.; Hussey, Michael

2012-01-01

Medical doctor and geologist Dr. Ferdinand Vandiveer Hayden selected more than 30 scientists, technical personnel, and artists, including photographer William Henry Jackson and painter Thomas Moran, to join the survey of the Yellowstone region in northwest Wyoming territory. Thomas Moran was an accomplished artist when he joined the survey to…

A Biography of Distinguished Scientist Gilbert Newton Lewis (by Edward S. Lewis)

Science.gov (United States)

Harris, Reviewed By Harold H.

1999-11-01

The Edward Mellen Press: Lewiston, NY, 1998. 114 pp + index. ISBN 0-7734-8284-9. $69.95. There may not be a surname better known to students of chemistry than Lewis, from the Lewis electron-dot diagrams and the Lewis theory of acids and bases. More advanced students may know of the groundbreaking textbook Thermodynamics, by Lewis and Randall. Yet few Americans know much about this remarkable U.S.-born scholar, whose contributions equal those of the greatest scientists. He is a chemist-educator of whom we should be as proud and as well informed as we are of Linus Pauling, who was part of the westward movement of science in this country that G. N. Lewis began, or of the recently deceased Glenn Seaborg, who was one of the many students of Lewis who achieved renown. Gilbert N. Lewis was born in Weymouth, Massachusetts, in 1875, but his family moved to near Lincoln, Nebraska, in 1884. He spent two years at the University of Nebraska, but then moved to Harvard when his father became an executive at Merchants Trust Company in Boston. Young Lewis (then only 17) was also said to have been disappointed with the quality of education in Nebraska, and this may have been part of the impetus for the family's move east. After earning his baccalaureate at Harvard, he taught for a year at Phillips Andover Academy before returning to Harvard to study for his doctorate, which he completed 100 years ago, in 1899, under T. W. Richards. Lewis's doctoral work was on the thermodynamics of zinc and cadmium amalgams. At that time, physical chemistry was only beginning to achieve recognition as a branch of science, and its boundaries were ill defined. Edward Lewis quotes his father as often saying, "Physical chemistry is anything interesting." Like many chemists of his time, Lewis went to Europe to complete his preparation for a career; he was in the laboratories of Ostwald in Leipzig and Nernst in Göttingen in 1900-1901. On his return to the United States, he was an instructor at Harvard

78 FR 16208 - Safety Zone; V. I. Carnival Finale; St. Thomas Harbor; St. Thomas, U.S. Virgin Islands

Science.gov (United States)

2013-03-14

... 1625-AA00 Safety Zone; V. I. Carnival Finale; St. Thomas Harbor; St. Thomas, U.S. Virgin Islands AGENCY... establish a safety zone on the waters of St. Thomas Harbor in St. Thomas, U. S. Virgin Islands during the V... between 9 a.m. and 5 p.m., Monday through Friday, except federal holidays. The telephone number is 202-366...

Lewy Body Dementia Diagnosis

Science.gov (United States)

... provide an experienced diagnostic team skilled in Lewy body dementia. A thorough dementia diagnostic evaluation includes physical ... a good way to benefit others with Lewy body dementia. Medications Medications are one of the most ...

Lewy Body Dementia Research

Science.gov (United States)

... notices changes in at least one area of cognition, such as memory or language. Daytime Sleepiness is ... the field of Lewy body dementias. Memantine Improves Attention and Episodic Memory in Mild to Moderate Lewy ...

Bernard Lewis: An Appreciation.

Science.gov (United States)

Humphreys, R. Stephen

1990-01-01

Discusses the career and publications of Bernard Lewis, a noted scholar in the field of Middle-Eastern studies and Islamic history. Traces the history of Western-based Islamic historiography. Examines Lewis' interpretation of Islamic history, outlining his political and social views. (RW)

Relativistic finite-temperature Thomas-Fermi model

Science.gov (United States)

Faussurier, Gérald

2017-11-01

We investigate the relativistic finite-temperature Thomas-Fermi model, which has been proposed recently in an astrophysical context. Assuming a constant distribution of protons inside the nucleus of finite size avoids severe divergence of the electron density with respect to a point-like nucleus. A formula for the nuclear radius is chosen to treat any element. The relativistic finite-temperature Thomas-Fermi model matches the two asymptotic regimes, i.e., the non-relativistic and the ultra-relativistic finite-temperature Thomas-Fermi models. The equation of state is considered in detail. For each version of the finite-temperature Thomas-Fermi model, the pressure, the kinetic energy, and the entropy are calculated. The internal energy and free energy are also considered. The thermodynamic consistency of the three models is considered by working from the free energy. The virial question is also studied in the three cases as well as the relationship with the density functional theory. The relativistic finite-temperature Thomas-Fermi model is far more involved than the non-relativistic and ultra-relativistic finite-temperature Thomas-Fermi models that are very close to each other from a mathematical point of view.

Rejoinder to Lewis

Directory of Open Access Journals (Sweden)

Ashton Anderson

2015-01-01

Full Text Available In a response to our article “Political Ideology and Racial Preferences in Online Dating,” Kevin Lewis (2015 has raised concerns about various aspects of our analysis of user behavior on a national online dating site. The core of Lewis’ critique is that we do not report specifics of the sample, the website, and the analysis. Lewis also details numerous smaller points with respect to details of the analysis. The goal of this response is not to reply to every point that Lewis makes. As with any research project, our design decisions require tradeoffs, and readers should evaluate the evidence on their own. Rather, we use this space to make broader points about the general value for sociology of research using online data and how such research should be practiced.

Dans quelle mesure l’athéisme est-il inacceptable pour l’auteur du Theophrastus redivivus et pour Spinoza ?

Directory of Open Access Journals (Sweden)

Nicole Gengoux

2012-09-01

Full Text Available Un problème posé par le Theophrastus redivivus, traité anonyme achevé en 1659, matérialiste et athée (au sens actuel du terme, est que l’auteur tout en critiquant radicalement la croyance en dieu, affirme qu’il faut chasser l’athéisme de la cité. Son athéisme est pourtant « pensable » : non seulement le mot n’est pas anachronique pour le xviie siècle, comme le pensent de nombreux commentateurs, mais le traité lui-même fait la généalogie de la croyance tout en exposant un système de pensée cohérent qui se passe de dieu.Le rejet du terme « athéisme » est d’ordre moral et social car il désigne celui qui se laisse entraîner par ses instincts. L’auteur nous prévient, en quelque sorte, que ce n’est pas parce qu’il nie les dieux qu’il n’est pas respectueux des lois. Cependant, l’« inacceptabilité » du terme « athée » a aussi un sens plus profond : comment, en effet, concilier l’ordre social et l’absence d’un Bien et d’un Mal absolus ? Certes le traité propose une solution purement naturelle en fondant la morale sur l’amour de soi, mais comment le faire comprendre ? C’est peu « acceptable » au sens de « compréhensible ».Nous pouvons distinguer des degrés d’inacceptabilité : l’amoralisme théorique paraît plus inacceptable, encore, que l’affirmation de l’inexistence de dieu, parce qu’il risque d’entraîner la désobéissance civile : c’est cette dernière qui constitue l’inacceptable absolu, pour notre Anonyme comme pour les lecteurs. Une conséquence paradoxale est que la thèse de l’imposture des religions est peut-être, pour des raisons politiques, moins inacceptable que cet amoralisme et surtout que le constat par l’Anonyme de l’inefficacité totale des religions. Enfin, les choses pouvant être dites plus ou moins haut, l’acceptabilité suppose plus de complicité et d’hypocrisie de la part du lecteur que nous aurions tendance �

78 FR 22778 - Safety Zone; Corp. Event Finale UHC, St. Thomas Harbor; St. Thomas, U.S.V.I.

Science.gov (United States)

2013-04-17

... waters of St. Thomas Harbor in St. Thomas, U.S. Virgin Islands during the Corp. Event Finale UHC, a.... and 5 p.m., Monday through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT: If you..., St. Thomas, U. S. Virgin Islands. The fireworks will be launched from a barge stationed near the St...

Symptoms of Lewy Body Dementia

Science.gov (United States)

... the fight against LBD! Donate Symptoms Lewy body dementia (LBD) has variable presentations that include cognitive difficulties ... wake cycle alterations. Cognitive impairment in Lewy body dementia (LBD) is often misdiagnosed as Alzheimer’s disease (AD). ...

Slovene critics on Sinclair Lewis's novels

Directory of Open Access Journals (Sweden)

Vanja Avsenak

2010-12-01

Full Text Available The purpose of this article is to present the reception of Sinclair Lewis's novels by Slovene critics. Initially, the article focuses on the life and workof Sinclair Lewis, giving special emphasis to social influences that made the author a representative figure in the literary and social world. Thus his works are nowadays to be understood primarily as fiction, but on the other hand also as sociological documents of a social and political situation of the period between the two world wars. Generally, the effect they produce is one of a critical discussion of the nation of the United States. When speaking of the social relevance that Lewis's novels have, it is obvious that his works are the portrayals of Americans and their deficiencies. At the time of their publication Lewis's novels received unfavourable criticism on accountof his overly open pro-European attitude and Slovene critics of the period before World War II emphasise this in much detail. It was precisely this anti-American propaganda in the novels themselves and sincerity on the part of the novelist that won the European critics as well as the readers whenit came to appreciating his works. However, Lewis's view of the Americans, as presented throughout his works, only enhanced his literary credibility as a modern writer. That is why the articles by Slovene critics that appeared after the Second World War, and even more significantly after Lewis's death, almost minutely reflect a more favourable attitude to Sinclair Lewis, which was also the case with foreign literary criticism of the post-war period. Critics still discuss the qualities and flaws of Lewis's novels, but being more lenient they no longer profess that the novels lack in artistic value. They remain, however, primarily relevant as social documents of the pre- and post-war era, which fully presented the American middle-class mentality in America and elsewhere. For this reason, the Nobel Prize for Literature awarded to

Relativistic effects in the Thomas--Fermi atom

International Nuclear Information System (INIS)

Waber, J.T.; Canfield, J.M.

1975-01-01

Two methods of applying relativistic corrections to the Thomas--Fermi atom are considered, and numerical calculations are discussed. Radial charge distributions calculated from a relativistic Thomas--Fermi equation agree in gross form with those from more complicated self-consistent calculations. Energy eigenvalues for mercury, as determined from the relativistic Thomas--Fermi solution, are compared with other calculated and experimental values

Thomas Jefferson's Academical Village

DEFF Research Database (Denmark)

Foote, Jonathan; Frohburg, Jan

2017-01-01

This is an essay written for the Festschrift of Karl-Heinz Schmitz, Professor at Bauhaus-Universität Weimar. It reflects on some aspects of Thomas Jefferson's design for the University of Virginia in relation to Professor's Schmitz' teachings and interests.......This is an essay written for the Festschrift of Karl-Heinz Schmitz, Professor at Bauhaus-Universität Weimar. It reflects on some aspects of Thomas Jefferson's design for the University of Virginia in relation to Professor's Schmitz' teachings and interests....

Thomas-Fermi molecular dynamics

International Nuclear Information System (INIS)

Clerouin, J.; Pollock, E.L.; Zerah, G.

1992-01-01

A three-dimensional density-functional molecular-dynamics code is developed for the Thomas-Fermi density functional as a prototype for density functionals using only the density. Following Car and Parrinello [Phys. Rev. Lett. 55, 2471 (1985)], the electronic density is treated as a dynamical variable. The electronic densities are verified against a multi-ion Thomas-Fermi algorithm due to Parker [Phys. Rev. A 38, 2205 (1988)]. As an initial application, the effect of electronic polarization in enhancing ionic diffusion in strongly coupled plasmas is demonstrated

In Conversation with: Professor Liz Thomas

Directory of Open Access Journals (Sweden)

Karen Nelson

2012-08-01

Full Text Available Editors Karen Nelson, John Clarke and Sally Kift interview Professor Liz Thomas,  Director of the Widening Participation Research Centre at Edge Hill University.  She is also Lead Adviser Retention and Success at the Higher Education Academy, England.   Professor Thomas was one of the keynote speakers at the 15th International First Year in Higher Education Conference held in Brisbane, Australia from the 26th – 29th of June, 2012.  Professor Thomas joined the Journal Editors at the conclusion of the main conference program to explore some of the key themes raised in her address.  

Thomas Aquinas

DEFF Research Database (Denmark)

Haaning, Aksel

2011-01-01

Artiklen præsenterer Thomas Aquinas i højmiddelalderens intellektuelle historie, reviderer den for tiden gældende historiegrafi og præsenterer Aquinas' erotiske mystik fra prologen til Sentenskommentaren (ca.1252) og diskuterer "Aurora consurgens" som et muligt sidste skrift af den berømte...

Streptococcal cell wall-induced arthritis and adjuvant arthritis in F344----Lewis and in Lewis----F344 bone marrow chimeras

International Nuclear Information System (INIS)

van Bruggen, M.C.; van den Broek, M.F.; van den Berg, W.B.

1991-01-01

Streptococcal cell wall (SCW)-induced arthritis and adjuvant arthritis (AA) are rat models for chronic, erosive polyarthritis. Both models can be induced in susceptible Lewis rats, whereas F344 rats are resistant. In AA as well as in SCW arthritis, antigen-specific T lymphocytes have been demonstrated to be crucial for chronic disease. In this communication the authors describe their studies to probe the cellular mechanism responsible for the difference in susceptibility of Lewis and F344, using bone marrow chimeras. By transplanting bone marrow cells from F344 into lethally irradiated Lewis recipients, Lewis rats were rendered resistant to SCW arthritis induction. F344 rats reconstituted with Lewis bone marrow, i.e., Lewis----F344 chimeras, develop an arthritis upon SCW injection. For AA comparable results were obtained. These data suggest that both resistance and susceptibility to bacterium-induced chronic arthritis are mediated by hemopoietic/immune cells and that the recipiental environment does not influence the susceptibility to chronic joint inflammation

LEWIS BINFORD AND HIS MORAL MAJORITY (Lewis Binford y su mayoría moral

Directory of Open Access Journals (Sweden)

Alice Beck Kehoe

2011-06-01

Full Text Available This essay looks at the late Lewis Binford’s career from the standpoint of sociology of science. His thinking and manner reflect his socialization in Virginia Baptist subculture. As convinced of his authority on science as Jerry Falwell was of his authority on Biblical morality, Lewis Binford and his third wife Sally Rosen Binford excited a group of 1960s students to follow Lewis in an outmoded version of science (hypothetico-deductive and in trusting statistics. The “frames of reference” he laboriously constructed are naïve on environmental interpretation and, because he expressed contempt for “political” aspects of archaeology, fail to take into account effects of colonialism. His work is often scientistic, in the “modern” mode that historian Dorothy Ross describes as characteristic of twentieth-century American social sciences. ESPAÑOL: En este ensayo se analiza la etapa final de la carrera de Lewis Binford desde el punto de vista de la sociología de la ciencia. Su pensamiento refleja su socialización en el seno de la subcultura de la Virginia baptista. Tan convencido de su autoridad en la ciencia como Jerry Falwell lo fuera sobre la moralidad bíblica, Lewis Binford y su tercera esposa Sally Rosen Binford animaron a un grupo estudiantes de los sesenta a seguir a Lewis a través de una versión anticuada de la ciencia (hipotético-deductiva y a confiar en la estadística. Los “marcos de referencia” que laboriosamente construyó son ingenuos en la interpretación del medio ambiente y, como expresó el desprecio por los aspectos “políticos” de la arqueología, no tienen en cuenta los efectos del colonialismo. Su trabajo es a menudo cientificista, en el sentido “moderno” que la historiadora Dorothy Ross describe como una característica de las ciencias sociales norteamericanas del siglo XX.

Lewis basicity of relevant monoanions in a non-protogenic organic solvent using a zinc(ii) Schiff-base complex as a reference Lewis acid.

Science.gov (United States)

Oliveri, Ivan Pietro; Di Bella, Santo

2017-09-12

Anions are ubiquitous species playing a primary role in chemistry, whose reactivity is essentially dominated by their Lewis basicity. However, no Lewis basicity data, in terms of Gibbs energy, are reported in the literature. We report here the first Lewis basicity of relevant monoanions through the determination of binding constants for the formation of stable 1 : 1 adducts, using a Zn II Schiff-base complex, 1, as a reference Lewis acid. Binding constants for equilibrium reactions were achieved through a nonlinear regression analysis of the binding isotherms from spectrophotometric titration data. The Lewis acidic complex 1 is a proper reference species because it forms stable adducts with both neutral and charged Lewis bases, thus allowing ranking their Lewis basicity. Binding constants indicate generally a strong Lewis basicity for all involved anions, rivalling or exceeding that of the stronger neutral bases, such as primary amines or pyridine. The cyanide anion results to be the strongest Lewis base, while the nitrate is the weaker base within the present anion series. Moreover, even the weaker base anions behave as stronger bases than the most common non-protogenic coordinating solvents.

Frustrated Lewis pairs: Design and reactivity

Indian Academy of Sciences (India)

for FLP systems and their unique reactivity are discussed here. Keywords. Lewis .... we will concentrate on the design principles of such. FLPs and the ... Designs of frustrated Lewis pairs ..... 64 and neutral titanium (III) complex [Cp2TiOC6.

Teaching Beginning Chemistry Students Simple Lewis Dot Structures

Science.gov (United States)

Nassiff, Peter; Czerwinski, Wendy A.

2015-01-01

Students beginning their initial study of chemistry often have a difficult time mastering simple Lewis dot structures. Textbooks show students how to manipulate Lewis structures by moving valence electron dots around the chemical structure so each atom has an octet or duet. However, an easier method of teaching Lewis structures for simple…

Pipe failure probability - the Thomas paper revisited

International Nuclear Information System (INIS)

Lydell, B.O.Y.

2000-01-01

Almost twenty years ago, in Volume 2 of Reliability Engineering (the predecessor of Reliability Engineering and System Safety), a paper by H. M. Thomas of Rolls Royce and Associates Ltd. presented a generalized approach to the estimation of piping and vessel failure probability. The 'Thomas-approach' used insights from actual failure statistics to calculate the probability of leakage and conditional probability of rupture given leakage. It was intended for practitioners without access to data on the service experience with piping and piping system components. This article revisits the Thomas paper by drawing on insights from development of a new database on piping failures in commercial nuclear power plants worldwide (SKI-PIPE). Partially sponsored by the Swedish Nuclear Power Inspectorate (SKI), the R and D leading up to this note was performed during 1994-1999. Motivated by data requirements of reliability analysis and probabilistic safety assessment (PSA), the new database supports statistical analysis of piping failure data. Against the background of this database development program, the article reviews the applicability of the 'Thomas approach' in applied risk and reliability analysis. It addresses the question whether a new and expanded database on the service experience with piping systems would alter the original piping reliability correlation as suggested by H. M. Thomas

Lewy Body Disease

Science.gov (United States)

... range of symptoms, including Changes in alertness and attention Hallucinations Problems with movement and posture Muscle stiffness Confusion Loss of memory Lewy body disease can be hard to diagnose, ...

Elucidating the Key Role of a Lewis Base Solvent in the Formation of Perovskite Films Fabricated from the Lewis Adduct Approach.

Science.gov (United States)

Cao, Xiaobing; Zhi, Lili; Li, Yahui; Fang, Fei; Cui, Xian; Yao, Youwei; Ci, Lijie; Ding, Kongxian; Wei, Jinquan

2017-09-27

High-quality perovskite films can be fabricated from Lewis acid-base adducts through molecule exchange. Substantial work is needed to fully understand the formation mechanism of the perovskite films, which helps to further improve their quality. Here, we study the formation of CH 3 NH 3 PbI 3 perovskite films by introducing some dimethylacetamide into the PbI 2 /N,N-dimethylformamide solution. We reveal that there are three key processes during the formation of perovskite films through the Lewis acid-base adduct approach: molecule intercalation of solvent into the PbI 2 lattice, molecule exchange between the solvent and CH 3 NH 3 I, and dissolution-recrystallization of the perovskite grains during annealing. The Lewis base solvents play multiple functions in the above processes. The properties of the solvent, including Lewis basicity and boiling point, play key roles in forming smooth perovskite films with large grains. We also provide some rules for choosing Lewis base additives to prepare high-quality perovskite films through the Lewis adduct approach.

Lewy body dementia--clinical, pathological and neurochemical interconnections.

Science.gov (United States)

Perry, R; McKeith, I; Perry, E

1997-01-01

Senile dementia of Lewy body type or Lewy body dementia (SDLT or LBD) is defined as a Lewy body associated disease presenting in the elderly primarily with dementia with variable extrapyramidal disorder. Characteristic clinical symptoms include fluctuating cognitive impairment, psychotic features such as hallucinations and a particular sensitivity to neuroleptic medication. Although apolipoprotein e4 allele is increased 2-3 fold in SDLT (as in Alzheimer's disease) and beta-amyloidosis occurs in most cases, the most robust neurobiological correlate of the dementia so far identified appears to be extensive cholinergic deficits in the neocortex. This is consistent with previously reported correlations between cortical cholinergic activity and dementia in Parkinson's disease (PD) and Alzheimer's disease. There is also a significant interaction between the density of limbic cortical Lewy bodies and dementia in both SDLT and PD, although the cortical neuronal population affected remains to be identified. Cortical Lewy body density is positively correlated with the age of disease onset in PD and SDLT. This may account for the increased incidence of psychiatric syndromes, as opposed to extrapyramidal disorder in Lewy body disease with advancing age as may age-related loss of cholinergic activity in cortical areas such as the hippocampus.

Nuclear pursuits: The scientific biography of Wilfrid Bennett Lewis

International Nuclear Information System (INIS)

Fawcett, R.

1994-01-01

The scientific life of Wilfrid Bennett Lewis. The biography covers Lewis's role in the development of radar, his tenure as the Chief Superintendent of the Telecommunications Research Establishment at Malvern through his heading of the then fledgling Canadian nuclear research facility in Chalk River, Ontario. Lewis's drive, intelligence, and remarkable organizational skills placed him at the forefront of Canada's nuclear program. His influence lead to a collaboration between Atomic Energy of Canada Limited and Ontario Hydro that ultimately resulted in the development of the CANDU reactor. His influence was also profound in the near by town of Deep River with one prime legacy being the W.B. Lewis Library. Lewis's bibliography is included in the biography

Group dynamics in a long-term blind endeavor on Earth: An analog for space missions (Lewis & Clark Expedition group dynamic analysis)

Science.gov (United States)

Allner, M.; Rygalov, V.

2008-12-01

In 1803, President Thomas Jefferson set fourth a military expedition led by Captains M. Lewis and W. Clark (Lewis and Clark Expedition) on an exploration that would become an everlasting part of US national history and pride. Looking back at the events of this exploration, there are many similarities to the experiences future human space explorers will face as we look to colonize the Moon and travel to Mars and beyond (NASA Vision for Space Exploration, 2004): The Lewis and Clark Expedition lasted almost three years and involved a crew of 43 men traveling up the Missouri River to explore the unknown lands and a possible water route to the Pacific Ocean; The Expedition took place far away from customary comfortable environments known to European settlers in the early 18th century; The Expedition involved a remotely confined high-perceived risk environment with high levels of uncertainty providing stresses and every day challenges for the crew; Supplies brought on the mission were limited (mainly a mass/weight issue rather than cost), therefore the discovery and use of environmental resources (In-Situ Resource Utilization approach, including info-resources to mitigate uncertainty) was necessary for crew survival. The environments astronauts will encounter in space and on the Moon and Mars due to high risk and uncertainty will be in many aspects similar to what Lewis and Clark's crew experienced, as environments will be hostile and unforgiving if problems arise and aren't resolved quickly. The analysis provided in this research paper is relevant because the Lewis and Clark Expedition needed to move extensively and with minimal supplies. Polar remote settings, which were analyzed extensively, were different from this expedition due to the fact that these missions did not encompass extensive movement of crew facilities and supplies and were more like space missions orbiting the Earth. Using past space station results of performance on orbit in correlation with a

Electron-electron Thomas peak in fast transfer ionization

International Nuclear Information System (INIS)

Tolmanov, S. G.; McGuire, J. H.

2000-01-01

''Thomas process'' is a name used for a family of singular two-step processes that can lead to electron transfer. The Thomas process of the ''second kind,'' occurring in reactions with both transfer and ionization, utilizes the e-e scattering in the second step, so this Thomas process requires the dynamics of the electron-electron interaction. We calculate numerically the second order element of an S matrix and corresponding cross sections for the transfer ionization process. We find that the position and shape of the Thomas peak depend on both electron-electron and the electron-nucleus interaction. Also the direct and exchange amplitudes are equal at the peak position. We test the peaking approximation used for transfer ionization. Our results can be compared to experimental results for p + +He→H+He 2+ +e - . (c) 2000 The American Physical Society

Nitrile ylides: diastereoselective cycloadditions using chiral oxazolidinones without Lewis acid.

Science.gov (United States)

Sibi, Mukund P; Soeta, Takahiro; Jasperse, Craig P

2009-12-03

Lewis acid complexation is generally required for chiral-auxiliary-controlled stereoselectivity, and chiral Lewis acid catalysis is frequently optimal for introducing asymmetry. In this work, we show that nitrile ylide cycloadditions to electron-poor acceptors attached to chiral auxiliaries proceed in high yield and stereoselectivity in the absence of Lewis acids. In contrast, chiral Lewis acids are inferior in these cycloadditions.

Thomas Fermi model of finite nuclei

International Nuclear Information System (INIS)

Boguta, J.; Rafelski, J.

1977-01-01

A relativistic Thomas-Fermi model of finite-nuclei is considered. The effective nuclear interaction is mediated by exchanges of isoscalar scalar and vector mesons. The authors include also a self-interaction of the scalar meson field and the Coulomb repulsion of the protons. The parameters of the model are constrained by the average nuclear properties. The Thomas-Fermi equations are solved numerically for finite, stable nuclei. The particular case of 208 82 Pb is considered in more detail. (Auth.)

On the axisymmetric Lewis metric

International Nuclear Information System (INIS)

Gariel, J.; Marcilhacy, G.

2001-03-01

We obtain the general solution of the axisymmetric stationary vacuum spacetime of Lewis. After precising the fundamental hypothesis of Lewis, we demonstrate that the solution is related to an arbitrary harmonic function. Formally, these solutions are the same as for the corresponding cylindrically symmetric case, and can be classified in a similar way. Furthermore, the interpretation, in the cylindrically symmetric system, of the field equations as decribing the motion of a classical particle in a central force field is still valid. (author)

76 FR 26223 - Petition for Rulemaking Submitted by Thomas Popik

Science.gov (United States)

2011-05-06

... Rulemaking Submitted by Thomas Popik AGENCY: Nuclear Regulatory Commission. ACTION: Petition for rulemaking... filed with the NRC by Thomas Popik. The petition was docketed by the NRC on March 15, 2011, and has been... received a petition for rulemaking on March 14, 2011 (PRM- 50-96). The petition was submitted by Mr. Thomas...

J K Thomas

Indian Academy of Sciences (India)

Home; Journals; Bulletin of Materials Science. J K Thomas. Articles written in Bulletin of Materials Science. Volume 31 Issue 5 October 2008 pp 719-722 Nanomaterials. Synthesis, characterization, sintering and dielectric properties of nanostructured perovskite-type oxide, Ba2GdSbO6 · C Vijayakumar H Padma Kumar Sam ...

Principal Component Surface (2011) for St. Thomas East End Reserve, St. Thomas

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a 0.3x0.3 meter principal component analysis (PCA) surface for areas the St. Thomas East End Reserve (STEER) in the U.S. Virgin Islands (USVI)....

Thomas Bartholin. Domus Anatomica Hafniensis brevissima descripta

DEFF Research Database (Denmark)

Bruun, Niels W.; Fink-Jensen, Morten

In 1662 Thomas Bartholin published A Short Description of the Anatomy House in Copenhagen, which describes the layout of the Anatomy House alongside the first eighteen years of its history.......In 1662 Thomas Bartholin published A Short Description of the Anatomy House in Copenhagen, which describes the layout of the Anatomy House alongside the first eighteen years of its history....

75 FR 4061 - Favinger, Thomas; Notice of Filing

Science.gov (United States)

2010-01-26

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ID-6223-000] Favinger, Thomas; Notice of Filing January 19, 2010. Take notice that on January 15, 2010, Mr. Thomas G. Favinger filed an application for authority to hold interlocking positions, pursuant to section 305(b) of the...

Vivien Thomas (1910-1985): the backstage pioneer and educator.

Science.gov (United States)

Ng, Chin Ting Justin

2014-06-01

Vivien Thomas (1910-1985) was an African-American scientist, pioneer, and renowned educator. Thomas's contributions to cardiovascular surgery were unequivocal, and yet it was only after his death that he gained more widespread recognition. Thomas's more notable work involves aiding in the discovery of the cause of traumatic shock, designing and guiding the first operation to treat Tetralogy of Fallot, carrying out the first atrial septectomy, and helping develop the electrical defibrillator. Thomas struggled amidst the adversities of racism and the Great Depression (1929-1941), armed merely with a high school degree. Nevertheless, his genius and determination eventually led him to receive an honorary doctorate from John Hopkins University. His story inspired the creation of the award winning PBS documentary in 2003 Partners of the Heart and also the 2004 Emmy Award-winning HBO film Something the Lord Made. This article will aim to provide an overview to the more notable events in Thomas's amazing tale, with a particular focus on his work on the Tetralogy of Fallot.

Frustrated Lewis Pairs

Indian Academy of Sciences (India)

Home; Journals; Resonance – Journal of Science Education; Volume 19; Issue 11. Frustrated Lewis Pairs : Enabling via inability. Sanjoy Mukherjee ... Author Affiliations. Sanjoy Mukherjee Pakkirisamy Thilagar1. Department of Inorgainic and Physical Chemistry Indian Institute of Science Bangalore 560 012, India.

Unruly Woman: An Interview with Helen Lewis.

Science.gov (United States)

Briscoe, Lori; Collins, Erica S.; Deal, Amanda; Hancock, Ron; McGraw, Kristyn; Lewis, Helen

2000-01-01

Overviews the career of Helen Lewis as sociologist, social activist, teacher, writer, researcher, and mentor. Helen Lewis discusses growing up in segregated Georgia, her unorthodox approach to education, her fight for social and economic equality, her instrumental role in the development of Appalachian Studies programs, and how social activism…

Complexation of Nitrous Oxide by Frustrated Lewis Pairs

NARCIS (Netherlands)

Otten, Edwin; Neu, Rebecca C.; Stephan, Douglas W.

2009-01-01

Frustrated Lewis pairs comprised of a basic yet sterically encumbered phosphine with boron Lewis acids bind nitrous oxide to give intact PNNOB linkages. The synthesis, structure, and bonding of these species are described.

Q & A with Ed Tech Leaders: Interview with Curtis J. Bonk, Mimi Miyoung Lee, Thomas C. Reeves, & Thomas H. Reynolds

Science.gov (United States)

Viner, Mark; Gardner, Ellen; Shaughnessy, Michael F.

2016-01-01

Curtis J. Bonk, is Professor of Instructional Systems Technology at Indiana University and President of CourseShare. Mimi Miyoung Lee is Associate Professor in the Department of Curriculum and instruction at the University of Houston. Thomas C. Reeves is Professor Emeritus of Learning, Design, and Technology at the University of Georgia. Thomas H.…

Thomas Gordon's Communicative Pedagogy in Modern Educational Realities

Science.gov (United States)

Leshchenko, Maria; Isaieva, Svitlana

2014-01-01

In the article the principles, strategies, methods, techniques of communicative pedagogy of American scientist Thomas Gordon and system components of effective communication training for parents, teachers and administrators are enlightened. It has been determined that the main principle of Thomas Gordon's pedagogy is an interactive way of knowing…

I-Metaiodobenzylguanidine Myocardial Scintigraphy in Lewy Body-Related Disorders: A Literature Review

Directory of Open Access Journals (Sweden)

Eun Joo Chung

2015-05-01

Full Text Available Lewy body-related disorders are characterized by the presence of Lewy bodies and Lewy neurites, which have abnormal aggregations of α-synuclein in the nigral and extranigral areas, including in the heart. 123I-metaiodobenzylguanidine (MIBG scintigraphy is a well-known tool to evaluate cardiac sympathetic denervation in the Lewy body-related disorders. MIBG scintigraphy showed low uptake of MIBG in the Lewy body-related disorders, including Parkinson’s disease, dementia with Lewy bodies, pure autonomic failure and rapid eye movement sleep behavior disorder. This review summarizes previous results on the diagnostic applications of MIBG scintigraphy in Lewy body-related disorders.

Effect of unequal fuel and oxidizer Lewis numbers on flame dynamics

Energy Technology Data Exchange (ETDEWEB)

Shamim, Tariq [Department of Mechanical Engineering, The University of Michigan-Dearborn, Dearborn, MI 48128-1491 (United States)

2006-12-15

The interaction of non-unity Lewis number (due to preferential diffusion and/or unequal rates of heat and mass transfer) with the coupled effect of radiation, chemistry and unsteadiness alters several characteristics of a flame. The present study numerically investigates this interaction with a particular emphasis on the effect of unequal and non-unity fuel and oxidizer Lewis numbers in a transient diffusion flame. The unsteadiness is simulated by considering the flame subjected to modulations in reactant concentration. Flames with different Lewis numbers (ranging from 0.5 to 2) and subjected to different modulating frequencies are considered. The results show that the coupled effect of Lewis number and unsteadiness strongly influences the flame dynamics. The impact is stronger at high modulating frequencies and strain rates, particularly for large values of Lewis numbers. Compared to the oxidizer side Lewis number, the fuel side Lewis number has greater influence on flame dynamics. (author)

Reexamination of shell model tests of the Porter-Thomas distribution

International Nuclear Information System (INIS)

Grimes, S.M.

1983-01-01

Recent shell model calculations have yielded width amplitude distributions which have apparently not agreed with the Porter-Thomas distribution. This result conflicts with the present experimental evidence. A reanalysis of these calculations suggests that, although correct, they do not imply that the Porter-Thomas distribution will fail to describe the width distributions observed experimentally. The conditions for validity of the Porter-Thomas distribution are discussed

33 CFR 110.250 - St. Thomas Harbor, Charlotte Amalie, V.I.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false St. Thomas Harbor, Charlotte... SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.250 St. Thomas Harbor, Charlotte Amalie.... Thomas, V.I. of the United States and approaches thereto, including all waters under its jurisdiction, as...

Bathymetry (2011) of the St. Thomas East End Reserve

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution depth surface for the St. Thomas East End Reserve (STEER), St. Thomas in the...

76 FR 20032 - Thomas E. Mitchell, M.D.; Dismissal of Proceeding

Science.gov (United States)

2011-04-11

... DEPARTMENT OF JUSTICE Drug Enforcement Administration [Docket No. 10-7] Thomas E. Mitchell, M.D... Control, Drug Enforcement Administration, issued an Order to Show Cause to Thomas E. Mitchell, M.D....100(b) and 0.104, I hereby order that the Order to Show Cause issued to Thomas E. Mitchell, M.D., be...

Intralaminar nuclei of the thalamus in Lewy body diseases.

Science.gov (United States)

Brooks, Daniel; Halliday, Glenda M

2009-02-16

Although the intralaminar thalamus is a target of alpha-synuclein pathology in Parkinson's disease, the degree of neuronal loss in Lewy body diseases has not been assessed. We have used unbiased stereological techniques to quantify neuronal loss in intralaminar thalamic nuclei concentrating alpha-synuclein pathology (the anterodorsal, cucullar, parataenial, paraventricular, central medial, central lateral and centre-median/parafascicular complex) in different clinical forms of Lewy body disease (Parkinson's disease with and without dementia, and dementia with Lewy bodies, N=21) compared with controls (N=5). Associations were performed in the Lewy body cases between intralaminar cell loss and the main diagnostic clinical (parkinsonism, dementia, fluctuation in consciousness, and visual hallucinations) and pathological (Braak stage of Parkinson's disease) features of these diseases, as well as between cell loss and the scaled severity of the alpha-synuclein deposition within the intralaminar thalamus. As expected, significant alpha-synuclein accumulation occurred in the intralaminar thalamus in the cases with Lewy body disease. Pathology concentrated anteriorly and in the central lateral and paraventricular nuclei was related to the Braak stage of Parkinson's disease, ageing, and the presence of dementia. Across all types of Lewy body cases there was substantial atrophy and neuronal loss in the central lateral, cucullar and parataenial nuclei, and neuronal loss without atrophy in the centre-median/parafascicular complex. Cases with visual hallucinations showed a greater degree of atrophy of the cucullar nucleus, possibly due to amygdala denervation. The significant degeneration demonstrated in the intralaminar thalamus is likely to contribute to the movement and cognitive dysfunction observed in Lewy body disorders.

75 FR 68350 - Fischer, Thomas J.; Notice of Filing

Science.gov (United States)

2010-11-05

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ID-6422-000] Fischer, Thomas J.; Notice of Filing October 29, 2010. Take notice that on October 29, 2010, Thomas J. Fischer filed an Application for Authorization to Hold Interlocking Positions as Director of Wisconsin Electric...

Llewellyn Hilleth Thomas: An appraisal of an under-appreciated polymath

Science.gov (United States)

Jackson, John David

2010-02-01

Llewellyn Hilleth Thomas was born in 1903 and died in 1992 at the age of 88. His name is known by most for only two things, Thomas precession and the Thomas-Fermi atom. The many other facets of his career - astrophysics, atomic and molecular physics, nonlinear problems, accelerator physics, magnetohydrodynamics, computer design principles and software and hardware - are largely unknown or forgotten. I review his whole career - his early schooling, his time at Cambridge, then Copenhagen in 1925-26, and back to Cambridge, his move to the US as an assistant professor at Ohio State University in 1929, his wartime years at the Ballistic Research Laboratory, Aberdeen Proving Grounds, then in 1946 his new career as a unique resource at IBM's Watson Scientific Computing Laboratory and Columbia University until his first retirement in 1968, and his twilight years at North Carolina State University. Although the Thomas precession and the Thomas-Fermi atom may be the jewels in his crown, his many other accomplishments add to our appreciation of this consummate applied mathematician and physicist. )

From Conventional Lewis Acids to Heterogeneous Montmorillonite K10: Eco-Friendly Plant-Based Catalysts Used as Green Lewis Acids.

Science.gov (United States)

Hechelski, Marie; Ghinet, Alina; Louvel, Brice; Dufrénoy, Pierrick; Rigo, Benoît; Daïch, Adam; Waterlot, Christophe

2018-04-25

The concept of green chemistry began in the USA in the 1990s. Since the publication of the 12 principles of this concept, many reactions in organic chemistry have been developed, and chemical products have been synthesized under environmentally friendly conditions. Lewis acid mediated synthetic transformations are by far the most numerous and best studied. However, the use of certain Lewis acids may cause risks to environmental and human health. This Review discusses the evolution of Lewis acid catalyzed reactions from a homogeneous liquid phase to the solid phase to yield the expected organic molecules under green, safe conditions. In particular, recent developments and applications of biosourced catalysts from plants are highlighted. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

76 FR 9012 - Favinger, Thomas G.; Notice of Filing

Science.gov (United States)

2011-02-16

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ID-6223-002] Favinger, Thomas G.; Notice of Filing Take notice that on January 31, 2011 Thomas G. Favinger submitted for filing, an application for authority to hold interlocking positions, pursuant to Section 305(b) of the...

C. S. Lewis, Reluctant Convert and (not so Ordinary Anglican

Directory of Open Access Journals (Sweden)

Mănăstireanu Dănuţ

2014-12-01

Full Text Available After some passing considerations on the reception of Lewis in Romania, the present paper discusses the role played by Anglicanism in the late personal commitment of C.S. Lewis to the Christian faith, after years of atheism, scepticism, and agnosticism. It argues that in fact Anglicanism contributed very little to Lewis’s (reconversion to Christianity. Furthermore, the paper agrees with the generally accepted idea that the particular calling that Lewis felt he had, that of being a Christian apologist, made him wary of being associated with the defence of any specific Christian tradition. In virtue of this special calling, Lewis also reacted quite strongly against certain aspects of Anglicanism, like, for instance, the ordination of women to priesthood, which he perceived as an obstacle to ecumenism and, implicitly, to an effective defence of the Christian faith in the public arena. In spite of all this, there is little doubt that Lewis has fully and unreservedly adopted Anglicanism as his preferred version of Christianity. From this particular stance, the life and ministry of C.S. Lewis made a huge public impact in the twentieth century and beyond. In light of the undeniable influence he had on the intellectual and religious scene in the last hundred years, one may ask not so much how Anglican was Lewis, but, rather, ‘why isn’t Anglicanism more like Lewis’.

Thomas precession in time

International Nuclear Information System (INIS)

Strnad, J.

1983-01-01

A Thomas precession mechanism is described which would become effective in a symmetric six-dimensional space-time if the time vector of a particle would rotate uniformly. For the effect a discrepancy of the decay time of particles in flight, proportional to their kinetic energy would be characteristic

Thomas Mann som bibelfortolker

DEFF Research Database (Denmark)

Nielsen, Kirsten

2007-01-01

Artiklen beskæftiger sig med Thomas Manns reception og transformation af den gammeltestamentlige fortælling om Josef og hans brødre. Særlig interesse samler sig om de gudsbilleder, værket indeholder, herunder relationen til Satan. Det karakteristiske ved Manns gudsbillede er, at Gud ikke er tydelig...

Morgan, Prof. Thomas Hunt

Indian Academy of Sciences (India)

Home; Fellowship. Fellow Profile. Elected: 1939 Honorary. Morgan, Prof. Thomas Hunt Nobel Laureate (Medicine) - 1933. Date of birth: 25 September 1866. Date of death: 4 December 1945. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th ...

Happy Birthday, Thomas Edison!

Science.gov (United States)

Dalton, Edward A.

1997-01-01

Discusses the work and inventions of Thomas Edison and their use in making teachers and students aware of the importance of electrotechnology in their lives and in their futures. Enables students to learn about science, experimentation, research, the process of invention, and the thrill of discovery. Describes educational resources available from…

Praost Thomas Vaga 70 / Juhan Simonson ; foto: Juhan Simonson

Index Scriptorium Estoniae

Simonson, Juhan, 1933-2012

2008-01-01

8. märtsil 70 aastaseks saavast üle 20 aasta kirikuõpetajana New Jerseys ja New Yorgis teeninud praost Thomas Vagast. President Toomas Hendrik Ilves annetas iseseisvuspäeva puhul Thomas Vagale kui eestluse hoidjale Ameerika Ühendriikides ja kirikuelu edendajale Valgetähe IV klassi teenetemärgi

Iron status determination in pregnancy using the Thomas plot.

Science.gov (United States)

Weyers, R; Coetzee, M J; Nel, M

2016-04-01

Physiological changes during pregnancy affect routine tests for iron deficiency. The reticulocyte haemoglobin equivalent (RET-He) and serum-soluble transferrin receptor (sTfR) assay are newer diagnostic parameters for the detection of iron deficiency, combined in the Thomas diagnostic plot. We used this plot to determine the iron status of pregnant women presenting for their first visit to an antenatal clinic in Bloemfontein, South Africa. Routine laboratory tests (serum ferritin, full blood count and C-reactive protein) and RET-He and sTfR were performed. The iron status was determined using the Thomas plot. For this study, 103 pregnant women were recruited. According to the Thomas plot, 72.8% of the participants had normal iron stores and erythropoiesis. Iron-deficient erythropoiesis was detected in 12.6%. A third of participants were anaemic. Serum ferritin showed excellent sensitivity but poor specificity for detecting depleted iron stores. HIV status had no influence on the iron status of the participants. Our findings reiterate that causes other than iron deficiency should be considered in anaemic individuals. When compared with the Thomas plot, a low serum ferritin is a sensitive but nonspecific indicator of iron deficiency. The Thomas plot may provide useful information to identify pregnant individuals in whom haematologic parameters indicate limited iron availability for erythropoiesis. © 2015 John Wiley & Sons Ltd.

Lewis acid enhanced switching of the 1,1-dicyanodihydroazulene/vinylheptafulvene photo/thermoswitch

DEFF Research Database (Denmark)

Parker, Christian Richard; Tortzen, Christian Gregers; Broman, Søren Lindbæk

2011-01-01

Mild Lewis acids enhance the rate of the thermal conversion of vinylheptafulvene (VHF) to dihydroazulene (DHA). In the absence of light, stronger Lewis acids promote the otherwise photoinduced DHA to VHF conversion.......Mild Lewis acids enhance the rate of the thermal conversion of vinylheptafulvene (VHF) to dihydroazulene (DHA). In the absence of light, stronger Lewis acids promote the otherwise photoinduced DHA to VHF conversion....

Time-dependent Thomas-Fermi approach to nuclear monopole oscillations

International Nuclear Information System (INIS)

Pi, M.; Barranco, M.; Nemeth, J.; Ngo, C.; Tomasi, E.

1985-10-01

A Time-dependent Thomas-Fermi (TDTF) method has been used to study nuclear monopole oscillations and in particular, the semiclassical strength function S(E). An analysis of the S(E) moments, obtained by suitable integrations, shows that these results are in good agreement with data previously obtained from static Thomas-Fermi calculations

Pareidolias: complex visual illusions in dementia with Lewy bodies.

Science.gov (United States)

Uchiyama, Makoto; Nishio, Yoshiyuki; Yokoi, Kayoko; Hirayama, Kazumi; Imamura, Toru; Shimomura, Tatsuo; Mori, Etsuro

2012-08-01

Patients rarely experience visual hallucinations while being observed by clinicians. Therefore, instruments to detect visual hallucinations directly from patients are needed. Pareidolias, which are complex visual illusions involving ambiguous forms that are perceived as meaningful objects, are analogous to visual hallucinations and have the potential to be a surrogate indicator of visual hallucinations. In this study, we explored the clinical utility of a newly developed instrument for evoking pareidolic illusions, the Pareidolia test, in patients with dementia with Lewy bodies-one of the most common causes of visual hallucinations in the elderly. Thirty-four patients with dementia with Lewy bodies, 34 patients with Alzheimer's disease and 26 healthy controls were given the Pareidolia test. Patients with dementia with Lewy bodies produced a much greater number of pareidolic illusions compared with those with Alzheimer's disease or controls. A receiver operating characteristic analysis demonstrated that the number of pareidolias differentiated dementia with Lewy bodies from Alzheimer's disease with a sensitivity of 100% and a specificity of 88%. Full-length figures and faces of people and animals accounted for >80% of the contents of pareidolias. Pareidolias were observed in patients with dementia with Lewy bodies who had visual hallucinations as well as those who did not have visual hallucinations, suggesting that pareidolias do not reflect visual hallucinations themselves but may reflect susceptibility to visual hallucinations. A sub-analysis of patients with dementia with Lewy bodies who were or were not treated with donepzil demonstrated that the numbers of pareidolias were correlated with visuoperceptual abilities in the former and with indices of hallucinations and delusional misidentifications in the latter. Arousal and attentional deficits mediated by abnormal cholinergic mechanisms and visuoperceptual dysfunctions are likely to contribute to the development

LiDAR Relative Reflectivity Surface (2011) for the St. Thomas East End Reserve, St. Thomas

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution relative seafloor reflectivity surface for the St. Thomas East End Reserve...

Orthophoto Mosaic (2012) of the St. Thomas East End Reserve

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This 0.3x0.3 meter imagery mosaic of the St. Thomas East End Reserve (STEER), St. Thomas in the U.S. Virgin Islands was created by the National Oceanic and...

Ransom, Religion, and Red Giants: C.S. Lewis and Fred Hoyle

Science.gov (United States)

Larsen, Kristine

2010-01-01

Famed fantasy writer C.S. Lewis (1898-1963) was known to friends as a well-read astronomy aficionado. However, this medieval scholar and Christian apologist embraced a pre-Copernican universe (with its astrological overtones) in his Chronicles of Narnia series and defended the beauty and relevance of the geocentric model in his final academic work, "The Discarded Image". In the "Ransom Trilogy” ("Out of the Silent Planet", "Perelandra", and "That Hideous Strength") philologist Ransom (loosely based on Lewis's close friend J.R.R. Tolkien) travels to Lewis's visions of Mars and Venus, where he interacts with intelligent extraterrestrials, battles with evil scientists, and aids in the continuation of extraterrestrial Christian values. In the final book, Ransom is joined by a handful of colleagues in open warfare against the satanic N.I.C.E. (National Institute for Coordinated Experiments). Geneticist and evolutionary biologist J.B.S. Haldane criticized Lewis for his scientifically inaccurate descriptions of the planets, and his disdain for the scientific establishment. Lewis responded to the criticism in essays of his own. Another of Lewis's favorite scientific targets was atheist Fred Hoyle, whom he openly criticized for anti-Christian statements in Hoyle's BBC radio series. Writer and Lewis friend Dorothy L. Sayers voiced her own criticism of Hoyle. In a letter, Lewis dismissed Hoyle as "not a great philosopher (and none of my scientific colleagues think much of him as a scientist.” Given Lewis's lack of respect for Hoyle, and use of creative license in describing the planets, and the flat-earth, "geocentric” Narnia, it is surprising that Lewis very carefully includes an astronomically correct description of red giants in two novels in the Narnia series ("The Magician's Nephew" and "The Last Battle"). This inclusion is even more curious given that Fred Hoyle is well-known as one of the pioneers in the field of stellar death and the properties of red giants.

Matrix models and stochastic growth in Donaldson-Thomas theory

Energy Technology Data Exchange (ETDEWEB)

Szabo, Richard J. [Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS, United Kingdom and Maxwell Institute for Mathematical Sciences, Edinburgh (United Kingdom); Tierz, Miguel [Grupo de Fisica Matematica, Complexo Interdisciplinar da Universidade de Lisboa, Av. Prof. Gama Pinto, 2, PT-1649-003 Lisboa (Portugal); Departamento de Analisis Matematico, Facultad de Ciencias Matematicas, Universidad Complutense de Madrid, Plaza de Ciencias 3, 28040 Madrid (Spain)

2012-10-15

We show that the partition functions which enumerate Donaldson-Thomas invariants of local toric Calabi-Yau threefolds without compact divisors can be expressed in terms of specializations of the Schur measure. We also discuss the relevance of the Hall-Littlewood and Jack measures in the context of BPS state counting and study the partition functions at arbitrary points of the Kaehler moduli space. This rewriting in terms of symmetric functions leads to a unitary one-matrix model representation for Donaldson-Thomas theory. We describe explicitly how this result is related to the unitary matrix model description of Chern-Simons gauge theory. This representation is used to show that the generating functions for Donaldson-Thomas invariants are related to tau-functions of the integrable Toda and Toeplitz lattice hierarchies. The matrix model also leads to an interpretation of Donaldson-Thomas theory in terms of non-intersecting paths in the lock-step model of vicious walkers. We further show that these generating functions can be interpreted as normalization constants of a corner growth/last-passage stochastic model.

Matrix models and stochastic growth in Donaldson-Thomas theory

International Nuclear Information System (INIS)

Szabo, Richard J.; Tierz, Miguel

2012-01-01

We show that the partition functions which enumerate Donaldson-Thomas invariants of local toric Calabi-Yau threefolds without compact divisors can be expressed in terms of specializations of the Schur measure. We also discuss the relevance of the Hall-Littlewood and Jack measures in the context of BPS state counting and study the partition functions at arbitrary points of the Kähler moduli space. This rewriting in terms of symmetric functions leads to a unitary one-matrix model representation for Donaldson-Thomas theory. We describe explicitly how this result is related to the unitary matrix model description of Chern-Simons gauge theory. This representation is used to show that the generating functions for Donaldson-Thomas invariants are related to tau-functions of the integrable Toda and Toeplitz lattice hierarchies. The matrix model also leads to an interpretation of Donaldson-Thomas theory in terms of non-intersecting paths in the lock-step model of vicious walkers. We further show that these generating functions can be interpreted as normalization constants of a corner growth/last-passage stochastic model.

33 CFR 165.762 - Security Zone; St. Thomas, U.S. Virgin Islands.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Security Zone; St. Thomas, U.S....762 Security Zone; St. Thomas, U.S. Virgin Islands. (a) Location. Moving and fixed security zones are established 50 yards around all cruise ships entering, departing, moored or anchored in the Port of St. Thomas...

Fullerene–Carbene Lewis Acid–Base Adducts

KAUST Repository

Li, Huaping

2011-08-17

The reaction between a bulky N-heterocylic carbene (NHC) and C60 leads to the formation of a thermally stable zwitterionic Lewis acid-base adduct that is connected via a C-C single bond. Low-energy absorption bands with weak oscillator strengths similar to those of n-doped fullerenes were observed for the product, consistent with a net transfer of electron density to the C60 core. Corroborating information was obtained using UV photoelectron spectroscopy, which revealed that the adduct has an ionization potential ∼1.5 eV lower than that of C60. Density functional theory calculations showed that the C-C bond is polarized, with a total charge of +0.84e located on the NHC framework and -0.84e delocalized on the C 60 cage. The combination of reactivity, characterization, and theoretical studies demonstrates that fullerenes can behave as Lewis acids that react with C-based Lewis bases and that the overall process describes n-doping via C-C bond formation. © 2011 American Chemical Society.

The Structure and Function of Male Thomas Langur Loud Calls

NARCIS (Netherlands)

Wich, Serge Alexander

2002-01-01

This study has addressed the acoustical structure of male loud calls and their function in Thomas langur social organisation. Thomas langurs are medium sized primate that lives in Sumatra, Indonesia. Ome of the characteristics of this species is the loud call of males. Several functions for loud

A token of individuality : Questiones libri Porphirii by Thomas Manlevelt

NARCIS (Netherlands)

Helm, Alfred Charles van der

2012-01-01

This is a critical edition with introduction and indices of the Questiones libri Porphirii, a commentary on Porphyry’s Isagoge attributed to the fourteenth-century logician Thomas Manlevelt. Not much is known about Thomas Manlevelt, but his work is remarkable enough. Following in the footsteps of

A systematic revision of Baconia Lewis (Coleoptera, Histeridae, Exosternini

Directory of Open Access Journals (Sweden)

Michael Caterino

2013-10-01

Full Text Available Here we present a complete revision of the species of Baconia. Up until now there have been 27 species assigned to the genus (Mazur, 2011, in two subgenera (Binhister Cooman and Baconia s. str., with species in the Neotropical, Nearctic, Palaearctic, and Oriental regions. We recognize all these species as valid and correctly assigned to the genus, and redescribe all of them. We synonymize Binhister, previously used for a polyphyletic assemblage of species with varied relationships in the genus. We move four species into Baconia from other genera, and describe 85 species as new, bringing the total for the genus to 116 species. We divide these into 12 informal species groups, leaving 13 species unplaced to group. We present keys and diagnoses for all species, as well as habitus photos and illustrations of male genitalia for nearly all. The genus now contains the following species and species groups: Baconia loricata group [B. loricata Lewis, 1885, B. patula Lewis, 1885, B. gounellei (Marseul, 1887a, B. jubaris (Lewis, 1901, B. festiva (Lewis, 1891, B. foliosoma sp. n., B. sapphirina sp. n., B. furtiva sp. n., B. pernix sp. n., B. applanatis sp. n., B. disciformis sp. n., B. nebulosa sp. n., B. brunnea sp. n.], B. godmani group [B. godmani (Lewis, 1888, B. venusta (J. E. LeConte, 1845, B. riehli (Marseul, 1862, comb. n., B. scintillans sp. n., B. isthmia sp. n., B. rossi sp. n., B. navarretei sp. n., B. maculata sp. n., B. deliberata sp. n., B. excelsa sp. n., B. violacea (Marseul, 1853, B. varicolor (Marseul, 1887b, B. dives (Marseul, 1862, B. eximia (Lewis, 1888, B. splendida sp. n., B. jacinta sp. n., B. prasina sp. n., B. opulenta sp. n., B. illustris (Lewis, 1900, B. choaspites (Lewis, 1901, B. lewisi Mazur, 1984], B. salobrus group [B. salobrus (Marseul, 1887b, B. turgifrons sp. n., B. crassa sp. n., B. anthracina sp. n., B. emarginata sp. n., B. obsoleta sp. n.], B. ruficauda group [B. ruficauda sp. n., B. repens sp. n.], B. angusta group [B

A systematic revision of Baconia Lewis (Coleoptera, Histeridae, Exosternini).

Science.gov (United States)

Caterino, Michael S; Tishechkin, Alexey K

2013-01-01

Here we present a complete revision of the species of Baconia. Up until now there have been 27 species assigned to the genus (Mazur, 2011), in two subgenera (Binhister Cooman and Baconia s. str.), with species in the Neotropical, Nearctic, Palaearctic, and Oriental regions. We recognize all these species as valid and correctly assigned to the genus, and redescribe all of them. We synonymize Binhister, previously used for a polyphyletic assemblage of species with varied relationships in the genus. We move four species into Baconia from other genera, and describe 85 species as new, bringing the total for the genus to 116 species. We divide these into 12 informal species groups, leaving 13 species unplaced to group. We present keys and diagnoses for all species, as well as habitus photos and illustrations of male genitalia for nearly all. The genus now contains the following species and species groups: Baconia loricata group [Baconia loricata Lewis, 1885, B. patula Lewis, 1885, Baconia gounellei (Marseul, 1887a), Baconia jubaris (Lewis, 1901), Baconia festiva (Lewis, 1891), Baconia foliosoma sp. n., Baconia sapphirina sp. n., Baconia furtiva sp. n., Baconia pernix sp. n., Baconia applanatis sp. n., Baconia disciformis sp. n., Baconia nebulosa sp. n., Baconia brunnea sp. n.], Baconia godmani group [Baconia godmani (Lewis, 1888), Baconia venusta (J. E. LeConte, 1845), Baconia riehli (Marseul, 1862), comb. n., Baconia scintillans sp. n., Baconia isthmia sp. n., Baconia rossi sp. n., Baconia navarretei sp. n., Baconia maculata sp. n., Baconia deliberata sp. n., Baconia excelsa sp. n., Baconia violacea (Marseul, 1853), Baconia varicolor (Marseul, 1887b), Baconia dives (Marseul, 1862), Baconia eximia (Lewis, 1888), Baconia splendida sp. n., Baconia jacinta sp. n., Baconia prasina sp. n., Baconia opulenta sp. n., Baconia illustris (Lewis, 1900), Baconia choaspites (Lewis, 1901), Baconia lewisi Mazur, 1984], Baconia salobrus group [Baconia salobrus (Marseul, 1887b), Baconia

Lewis Carroll, a educação e o ensino de geometria na Inglaterra vitoriana - Lewis Carroll, education and the teaching of geometry in victorian England

Directory of Open Access Journals (Sweden)

Rafael Montoito

2015-04-01

Full Text Available Parte da pesquisa motivada pela tradução para o português do livro Euclides e seus rivais modernos, publicado por Lewis Carroll em 1879, este artigo se inscreve numa série de estudos que visam a um exame hermenêutico dessa obra. São discutidos temas relacionados com a educação, a educação matemática e o ensino de geometria na Inglaterra vitoriana.Palavras-chave: Lewis Carroll, Euclides e seus rivais modernos, história da educação, educação matemática, geometria. LEWIS CARROLL, EDUCATION AND THE TEACHING OF GEOMETRY IN VICTORIAN ENGLANDAbstractResearch partly motivated by Lewis Carrroll's Euclid and his modern rivals (1879 portuguese translation, this paper presents some hermeneutical remarks taken as necessary to understand the context in which such book was produced. The paper focuses particularly on education, in general, and on the teaching of mathematics and geometry in victorian England.Key-words: Lewis Carroll, Euclid and his modern rivals, history of education, mathematics education, geometry. LEWIS CARROLL, LA EDUCACIÓN Y EL ENSINO DE GEOMETRÍA EN LA INGLATERRA VICTORIANAResumenParte de la investigación motivada por la traducción al portugués del libro Euclides y sus enemigos modernos, publicado por Lewis Carroll en 1879, este artículo se inscribe en una serie de estudios que tienen por objetivo hacer un examen hermenéutico de la obra. Son aquí discutidos temas relacionados como la educación, la educación matemática y la enseñanza de geometría en la Inglaterra victoriana.Palabras-clave: Lewis Carroll, Euclides y sus enemigos modernos, historia de la educación, educación matemática, geometría. LEWIS CARROLL, L’ÉDUCATION ET L’ENSEIGMENT DE GÉOMÉTRIE EN L’ANGLETERRE VICTORIENNERésuméFaisant partie de la recherche motivée par la traduction en portugais du livre Euclide et ses rivaux modernes, publié par Lewis Carrol en 1879 , cet article s’inscrit dans une série d’études dont le but

Professionaalne marketing - edu pant / Thomas Westerberg

Index Scriptorium Estoniae

Westerberg, Thomas

1999-01-01

Majanduslanguse perioodil tuleb fokusseerida oma plaanid tulevikku, sel perioodil avalduvad turundusjuhtide tõelised ja varjatud professionaalsed oskused. Thomas Westerbergi, Coca-Cola Baltic Beverages Ltd. tegevdirektori ettekanne Majanduskonverentsil "Kuidas olla edukas majanduslanguse perioodil"

California: 'the Stem Cell State'. Interview with Jonathan Thomas.

Science.gov (United States)

Thomas, Jonathan

2011-11-01

We talked to Jonathan Thomas, newly elected Chairman of the California Institute for Regenerative Medicine (CIRM), a few weeks into a role he describes as "the opportunity of the lifetime" to find out what he sees as the key goals for the CIRM and why patient advocates are so critical to the future of the Institute. Jonathan Thomas was elected as Chairman of the California Institute for Regenerative Medicine (CIRM) in June 2011, succeeding the Founder and former Chairman, Bob Klein. Thomas has had a successful career in finance and law and is a Co-Founding Partner at Saybrook Capital, an investment banking and private equity firm. His commitment to patient advocacy and keen interest in biological sciences, developed as a Biology Major at Yale, led him to stand for Chairman.

File list: Unc.Lng.20.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available Unc.Lng.20.AllAg.Carcinoma,_Lewis_Lung mm9 Unclassified Lung Carcinoma, Lewis Lung ...http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Lng.20.AllAg.Carcinoma,_Lewis_Lung.bed ...

Nonextensive Thomas-Fermi model

Science.gov (United States)

Shivamoggi, Bhimsen; Martinenko, Evgeny

2007-11-01

Nonextensive Thomas-Fermi model was father investigated in the following directions: Heavy atom in strong magnetic field. following Shivamoggi work on the extension of Kadomtsev equation we applied nonextensive formalism to father generalize TF model for the very strong magnetic fields (of order 10e12 G). The generalized TF equation and the binding energy of atom were calculated which contain a new nonextensive term dominating the classical one. The binding energy of a heavy atom was also evaluated. Thomas-Fermi equations in N dimensions which is technically the same as in Shivamoggi (1998) ,but behavior is different and in interesting 2 D case nonextesivity prevents from becoming linear ODE as in classical case. Effect of nonextensivity on dielectrical screening reveals itself in the reduction of the envelope radius. It was shown that nonextesivity in each case is responsible for new term dominating classical thermal correction term by order of magnitude, which is vanishing in a limit q->1. Therefore it appears that nonextensive term is ubiquitous for a wide range of systems and father work is needed to understand the origin of it.

Gilbert Newton Lewis: his influence on physical-organic chemists at Berkeley

Energy Technology Data Exchange (ETDEWEB)

Calvin, M.

1982-03-01

A review is presented of the historical contributions of Gilbert N. Lewis to science and a discussion of the influence of Lewis on the research of the members of the physical-organic staff at Berkeley, including Melvin Calvin, during the twenties, thirties and forties. Some specific examples are discussed. Also, the effect of Lewis, his science and administrative concepts in the creation of excellence in a department of chemistry are reviewed.

Gilbert Newton Lewis: his influence on physical-organic chemists at Berkeley

International Nuclear Information System (INIS)

Calvin, M.

1982-03-01

A review is presented of the historical contributions of Gilbert N. Lewis to science and a discussion of the influence of Lewis on the research of the members of the physical-organic staff at Berkeley, including Melvin Calvin, during the twenties, thirties and forties. Some specific examples are discussed. Also, the effect of Lewis, his science and administrative concepts in the creation of excellence in a department of chemistry are reviewed

File list: DNS.Lng.10.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available DNS.Lng.10.AllAg.Carcinoma,_Lewis_Lung mm9 DNase-seq Lung Carcinoma, Lewis Lung htt...p://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Lng.10.AllAg.Carcinoma,_Lewis_Lung.bed ...

File list: DNS.Lng.50.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available DNS.Lng.50.AllAg.Carcinoma,_Lewis_Lung mm9 DNase-seq Lung Carcinoma, Lewis Lung htt...p://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Lng.50.AllAg.Carcinoma,_Lewis_Lung.bed ...

File list: Pol.Lng.50.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available Pol.Lng.50.AllAg.Carcinoma,_Lewis_Lung mm9 RNA polymerase Lung Carcinoma, Lewis Lun...g http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.50.AllAg.Carcinoma,_Lewis_Lung.bed ...

File list: Pol.Lng.05.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available Pol.Lng.05.AllAg.Carcinoma,_Lewis_Lung mm9 RNA polymerase Lung Carcinoma, Lewis Lun...g http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.05.AllAg.Carcinoma,_Lewis_Lung.bed ...

File list: Pol.Lng.10.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available Pol.Lng.10.AllAg.Carcinoma,_Lewis_Lung mm9 RNA polymerase Lung Carcinoma, Lewis Lun...g http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Pol.Lng.10.AllAg.Carcinoma,_Lewis_Lung.bed ...

File list: DNS.Lng.20.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available DNS.Lng.20.AllAg.Carcinoma,_Lewis_Lung mm9 DNase-seq Lung Carcinoma, Lewis Lung htt...p://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/DNS.Lng.20.AllAg.Carcinoma,_Lewis_Lung.bed ...

Sir John Meurig Thomas.

Science.gov (United States)

Thomas, John Meurig

2013-10-11

"My greatest achievement has been to combine being a teacher, a researcher, and a popularizer of science for over 50 years. My worst nightmare is to find myself dumbstruck when I am about to give a lecture …︁" This and more about Sir John Meurig Thomas can be found on page 10938. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

File list: Oth.Lng.05.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available Oth.Lng.05.AllAg.Carcinoma,_Lewis_Lung mm9 TFs and others Lung Carcinoma, Lewis Lun...g http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Oth.Lng.05.AllAg.Carcinoma,_Lewis_Lung.bed ...

Student Rights, Clarence Thomas, and the Revolutionary Vision of Education

Science.gov (United States)

Warnick, Bryan R.; Rowe, Bradley; Kim, Sang Hyun

2009-01-01

In his concurring opinion to the 2007 U.S. Supreme Court decision, "Morse v. Frederick," Justice Clarence Thomas argues that the "Tinker" decision, which granted students constitutional rights in public schools, should be overturned on originalist grounds. In this essay, Bryan Warnick, Bradley Rowe, and Sang Hyun Kim make the case that Thomas's…

Lewis acid catalyzed transformations of Z-ligustilide

Energy Technology Data Exchange (ETDEWEB)

Rios, Maria Yolanda [Universidad Autonoma del Estado de Morelos, Cuernavaca, Morelos (Mexico); Delgado, Guillermo [Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

1999-08-01

Some Lewis acid mediated reactions of Z-ligustilide (1), a bioactive constituent of the medicinal species Ligusticum porteri, were investigated. These reactions provided varying mixtures of Z-butylidenephthalide (7), E-butylidenephthalide (8), n-butyphthalide (13), and novel linear dimeric phthalides (9-12) as the main products. The formation of the dimers occurred in low yields and with regio and situ-selectivity. Initial competitive O- and C- complexation of the Lewis acid with Z-ligustilide promoted the formation of the dimers occurred in low yields and with regio and situ- selectivity. Initial competitive O- and C- complexation of the Lewis acid with Z-ligustilide promoted the formation of carbocations at C(8), C(6) and C(7), which were stabilized by the addition of the C(6')-C(7') olefin of a second unit of the starting material, to provide cations at C(6') and C(7'). Subsequent isomerizations and elimination of the catalyst afforded the dimeric products 9-12. The yields and structure of the products are quite dependent on variations of the reaction conditions and the catalyst employed. [Spanish] Se investigaron algunas reacciones de Z-ligustilidas (1), un constituyente bioactivo de la planta medicinal Ligusticum porteri, catalizadas por acidos de Lewis. Estas reacciones produjeron mezclas variables de Z-butilidenftalida (7), E-butilidenftalida (8), n-butilftalida (13), y ftalidos dimetricos lineales novedosos (9-12) como productos principales. La formacion de los dimeros procedio en rendimientos bajos y con regio- y situ-selectividad. La O- y C- complejacion competitiva inicial del acido de Lewis con Z-lingustilida promueve la formacion de cationes en C(8), C(6) y C(7), los cuales son estabilizados por la adicion de la olefina C(6')-C(7') de una segunda unidad de la materia prima para generar los cationes en C(6')-C(7'). Isomerizaciones subsecuentes y la eliminacion del catalizador conducen a los productos dimericos 9

Thomas, Prof. Sir John Meurig

Indian Academy of Sciences (India)

Thomas, Prof. Sir John Meurig FRS. Date of birth: 15 December 1932. Address: Department of Materials Science and, Metallurgy, New Museums Site, 27, Babbage ... Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on the teaching of the theory of evolution more.

Lewis, Prof. Gilbert Newton

Indian Academy of Sciences (India)

Home; Fellowship. Fellow Profile. Elected: 1935 Honorary. Lewis, Prof. Gilbert Newton. Date of birth: 25 October 1875. Date of death: 24 March 1946. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...

Development of Fluorous Lewis Acid-Catalyzed Reactions

Directory of Open Access Journals (Sweden)

Joji Nishikido

2006-08-01

Full Text Available Organic synthetic methodology in the 21st century aims to conform to the principles of green sustainable chemistry (GSC and we may expect that in the future, the realization of GSC will be an important objective for chemical industries. An important aim of synthetic organic chemistry is to implement waste-free and environmentally-benign industrial processes using Lewis acids as versatile as aluminum choride. A key technological objective of our work in this area has been to achieve a “catalyst recycling system that utilizes the high activity and structural features of fluorous Lewis acid catalysts”. Thus, we have developed a series of novel fluorous Lewis acid catalysts, namely the ytterbium(III, scandium(III, tin(IV or hafnium(IV bis(perfluoroalkanesulfonylamides or tris(perfluoro- alkanesulfonylmethides. Our catalysts are recyclable and effective for acylations of alcohols and aromatics, Baeyer-Villiger reactions, direct esterifications and transesterifications in a fluorous biphasic system (FBS, in supercritical carbon dioxide and on fluorous silica gel supports.

Manipulating the Lewis antigen specificity of the cholesterol-dependent cytolysin lectinolysin

Directory of Open Access Journals (Sweden)

Sara eLawrence

2012-11-01

Full Text Available The cholesterol-dependent cytolysins (CDCs attack cells by punching large holes in their membranes. Lectinolysin from Streptococcus mitis is unique among CDCs due to the presence of an N-terminal lectin domain that enhances the pore-forming activity of the toxin. We recently determined the crystal structures of the lectin domain in complex with various glycans. These structures revealed the molecular basis for the Lewis antigen specificity of the toxin. Based on this information we have used in silico molecular modelling to design a mutant toxin, which we predicted would increase its specificity for Lewis y, an antigen found on the surface of cancer cells. Surprisingly, we found by surface plasmon resonance binding experiments that the resultant mutant lectin domain exhibited higher specificity for Lewis b antigens instead. We then undertook comparative crystallographic and molecular dynamics simulation studies of the wild-type and mutant lectin domains to understand the molecular basis for the disparity between the theoretical and experimental results. The crystallographic results revealed that the net number of interactions between Lewis y and wild-type versus mutant was unchanged whereas there was a loss of a hydrogen bond between mutant and Lewis b compared to wild-type. In contrast, the molecular dynamics studies revealed that the Lewis b antigen spent more time in the binding pocket of the mutant compared to wild-type and the reverse was true for Lewis y. The results of these simulation studies are consistent with the conclusions drawn from the surface plasmon resonance studies. This work is part of a program to engineer lectinolysin so that it will target and kill specific cells in human diseases.

Chiral lewis Acid catalysis in nitrile oxide cycloadditions.

Science.gov (United States)

Sibi, Mukund P; Itoh, Kennosuke; Jasperse, Craig P

2004-05-05

We describe examples of highly regio- and enantioselective nitrile oxide cycloadditions to unsaturated alkenes using substoichiometric amounts of a chiral Lewis acid. Pyrazolidinones proved to be effective achiral templates in the cycloadditions providing C-adducts typically in >30:1 selectivity and 80-99% ee. To avoid potential problems involving coordination of the Lewis acid by amine bases, we have devised a novel method for the generation of unstable nitrile oxides from hydroximinoyl chlorides using Amberlyst 21 as the base.

Interview with Smithsonian NASM Spacesuit Curator Dr. Cathleen Lewis

Science.gov (United States)

Lewis, Cathleen; Wright, Rebecca

2012-01-01

Dr. Cathleen Lewis was interviewed by Rebecca Wright during the presentation of an "Interview with Smithsonian NASM Spacesuit Curator Dr. Cathleen Lewis" on May 14, 2012. Topics included the care, size, and history of the spacesuit collection at the Smithsonian and the recent move to the state-of-the-art permanent storage facility at the Udvar-Hazy facility in Virginia.

Von Weizsaecker and exchange corrections in the Thomas Fermi theory

International Nuclear Information System (INIS)

Benguria, R.D.

1979-01-01

Two corrections to the Thomas-Fermi theory of atoms are studied. First the correction for exchange, that is the effect of the Pauli principle in the interaction energy, is considered. The defining variational problem is non-convex and standard technique to prove existence of a minimizing solution do not apply. Existence and uniqueness of solutions are established by convexifying or relaxing the energy functional. Properties of the minimizing solution are studied. A second correction due to von Weizsaecker is also discussed. Finally the dual principle to the Thomas-Fermi variational problem is studied (only in the neutral case). A dual principle is suggested for the ionic case. Also, a review of recent rigorous results concerning Thomas-Fermi theory is presented

Distance Learning With NASA Lewis Research Center's Learning Technologies Project

Science.gov (United States)

Petersen, Ruth

1998-01-01

The NASA Lewis Research Center's Learning Technologies Project (LTP) has responded to requests from local school district technology coordinators to provide content for videoconferencing workshops. Over the past year we have offered three teacher professional development workshops that showcase NASA Lewis-developed educational products and NASA educational Internet sites. In order to determine the direction of our involvement with distance learning, the LTP staff conducted a survey of 500 U.S. schools. We received responses from 72 schools that either currently use distance learning or will be using distance learning in 98-99 school year. The results of the survey are summarized in the article. In addition, the article provides information on distance learners, distance learning technologies, and the NASA Lewis LTP videoconferencing workshops. The LTP staff will continue to offer teacher development workshops through videoconferencing during the 98-99 school year. We hope to add workshops on new educational products as they are developed at NASA Lewis.

Wyndham Lewis

OpenAIRE

Maes-Jelinek, Hena

2013-01-01

Ours is a clownish age. If so the manYou be to understand it then you canScarcely be other than a man in an Iron MaskOr choose but choose a most invidious task. –Henceforth the voice you hear is the deep growl –The mask, if any, the notorious scowl –Of Enemy Number One. Wyndham Lewis was so prolific a writer that one sometimes tends to forget he was a painter in the first place, though his method owes much to the painter’s approach to his subject. His basic motive as a writer was to defend We...

Thomas Aquinas on Contingency of Nature

Czech Academy of Sciences Publication Activity Database

Dvořák, Petr

2008-01-01

Roč. 5, č. 2 (2008), s. 185-196 ISSN 1214-8407 R&D Projects: GA AV ČR(CZ) IAA900090602 Institutional research plan: CEZ:AV0Z90090514 Keywords : Thomas Aquinas * determinism * contingency Subject RIV: AA - Philosophy ; Religion

Functional connectivity in cortical regions in dementia with Lewy bodies and Alzheimer's disease.

Science.gov (United States)

Kenny, Eva R; Blamire, Andrew M; Firbank, Michael J; O'Brien, John T

2012-02-01

Using resting-state functional magnetic resonance imaging, spontaneous low-frequency fluctuations in the blood oxygenation level-dependent signal were measured to investigate connectivity between key brain regions hypothesized to be differentially affected in dementia with Lewy bodies compared with Alzheimer's disease and healthy controls. These included connections of the hippocampus, because of its role in learning, and parietal and occipital areas involved in memory, attention and visual processing. Connectivity was investigated in 47 subjects aged 60 years and over: 15 subjects with dementia with Lewy bodies, 16 subjects with Alzheimer's disease and 16 control subjects. Subjects were scanned using a 3 Tesla magnetic resonance imaging system. The mean blood oxygenation level-dependent signal time series was extracted from seed regions in the hippocampus, posterior cingulate cortex, precuneus and primary visual cortex and correlated with all other brain voxels to determine functional connectivity. Both subjects with dementia with Lewy bodies and Alzheimer's disease showed greater connectivity than control subjects. Compared with controls, the dementia with Lewy bodies group had greater connectivity between the right posterior cingulate cortex and other brain areas. In dementia with Lewy bodies, there were no significant differences in hippocampal connectivity compared with controls, but in Alzheimer's disease left hippocampal connectivity was greater compared with controls. There were no significant differences between groups for precuneus or primary visual cortex connectivity. No seed regions showed significantly less connectivity in subjects with dementia with Lewy bodies or Alzheimer's disease compared with controls. We found greater connectivity with the posterior cingulate in dementia with Lewy bodies and with the hippocampus in Alzheimer's disease. Consistent with the known relative preservation of memory in dementia with Lewy bodies compared with Alzheimer

Martineau, Harriet. - Mistry, Rohinton. - Peacock, Thomas Love

OpenAIRE

Beck, Rudolf

2002-01-01

Martineau, Harriet. - Mistry, Rohinton. - Peacock, Thomas Love. - In: Metzler-Lexikon englischsprachiger Autorinnen und Autoren / hrsg. von Eberhard Kreutzer ... - Stuttgart u.a. : Metzler, 2002. - S. 384, 405 f., 452 f.

File list: His.Lng.05.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available His.Lng.05.AllAg.Carcinoma,_Lewis_Lung mm9 Histone Lung Carcinoma, Lewis Lung SRX10...91778,SRX1091782,SRX1091783,SRX1091781,SRX1091784,SRX1091779,SRX1091785,SRX1091780 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/His.Lng.05.AllAg.Carcinoma,_Lewis_Lung.bed ...

Clinical and imaging correlates of amyloid deposition in dementia with Lewy bodies.

Science.gov (United States)

Donaghy, Paul C; Firbank, Michael J; Thomas, Alan J; Lloyd, Jim; Petrides, George; Barnett, Nicola; Olsen, Kirsty; O'Brien, John T

2018-04-19

Amyloid deposition is common in dementia with Lewy bodies, but its pathophysiological significance is unclear. The objective of this study was to investigate the relationship between amyloid deposition and clinical profile, gray matter volume, and brain perfusion in dementia with Lewy bodies. Dementia with Lewy bodies (n = 37), Alzheimer's disease (n = 20), and controls (n = 20) underwent a thorough clinical assessment, 3T MRI, and early- and late-phase 18 F-Florbetapir PET-CT to assess cortical perfusion and amyloid deposition, respectively. Amyloid scans were visually categorized as positive or negative. Image analysis was carried out using statistical parametric mapping (SPM) 8. There were no significant differences between amyloid-positive and amyloid-negative dementia with Lewy bodies cases in age (P = .78), overall cognitive impairment (P = .83), level of functional impairment (P = .80), or any other clinical or cognitive scale. There were also no significant differences in hippocampal or gray matter volumes. However, amyloid-positive dementia with Lewy bodies cases had lower medial temporal lobe perfusion (P = .03) than amyloid-negative cases, although a combination of medial temporal lobe perfusion, hippocampal volume, and cognitive measures was unable to accurately predict amyloid status in dementia with Lewy bodies. Amyloid deposition was not associated with differences in clinical or neuropsychological profiles in dementia with Lewy bodies, but was associated with imaging evidence of medial temporal lobe dysfunction. The presence of amyloid in dementia with Lewy bodies cannot be identified on the basis of clinical and other imaging features and will require direct assessment via PET imaging or CSF. © 2018 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society. © 2018 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf

Thomas-Fermi model of warm nuclei

International Nuclear Information System (INIS)

Buchler, J.R.; Epstein, R.I.

1980-01-01

The average nuclear level density of spherical nuclei is computed with a finite temperature Thomas-Fermi model. More than 80% of the low energy nuclear excitations can be accounted for in terms of this statistical model. The relevance for stellar collapse is discussed

File list: InP.Lng.50.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available InP.Lng.50.AllAg.Carcinoma,_Lewis_Lung mm9 Input control Lung Carcinoma, Lewis Lung... http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/InP.Lng.50.AllAg.Carcinoma,_Lewis_Lung.bed ...

77 FR 51564 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2012-08-24

... Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington... of human remains under the control of the Thomas Burke Memorial Washington State Museum (Burke Museum...

Lewy and his inclusion bodies: Discovery and rejection

Directory of Open Access Journals (Sweden)

Eliasz Engelhardt

Full Text Available ABSTRACT Fritz Jacob Heinrich Lewy described the pathology of Paralysis agitans [Parkinson disease] and was the first to identify eosinophilic inclusion bodies in neurons of certain brain nuclei, later known as Lewy bodies, the pathological signature of the Lewy body diseases. In 1912, he published his seminal study, followed soon after by an update paper, and 10 years later, in 1923, by his voluminous book, where he exhaustively described the subject. The publication provided extensive information on the pathology of Paralysis agitans, and the entirely novel finding of eosinophilic inclusion bodies, which would become widely recognized and debated in the future. His discovery was acknowledged by important researchers who even named the structure after him. However, after his last publication on the issue, inexplicably, he never mentioned his histopathological discovery again. Despite several hypotheses, the reasons that led him to neglect (reject the structure which he so preeminently described have remained elusive.

File list: NoD.Lng.05.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available NoD.Lng.05.AllAg.Carcinoma,_Lewis_Lung mm9 No description Lung Carcinoma, Lewis Lun...g http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/NoD.Lng.05.AllAg.Carcinoma,_Lewis_Lung.bed ...

File list: NoD.Lng.10.AllAg.Carcinoma,_Lewis_Lung [Chip-atlas[Archive

Lifescience Database Archive (English)

Full Text Available NoD.Lng.10.AllAg.Carcinoma,_Lewis_Lung mm9 No description Lung Carcinoma, Lewis Lun...g http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/NoD.Lng.10.AllAg.Carcinoma,_Lewis_Lung.bed ...

Thomas Mofolo: the man, the writer and his contexts | Gill | Tydskrif ...

African Journals Online (AJOL)

For example, as a boy, we learn that Thomas imbibed a great deal from his father Abner Ramofolo Mofolo, a very hard-working and practically-oriented man, who was himself a gifted storyteller. Given the possibility of pursuing higher studies through the Protestant PEMS Mission, Thomas grabbed this opportunity and came ...

Lewis acid catalysis of a Diels-Alder reaction in water

NARCIS (Netherlands)

Otto, S; Bertoncin, F; Engberts, JBFN

1996-01-01

Here we report the first detailed study of a Diels-Alder (DA) reaction that is catalyzed by Lewis acids in water. The effect of Co2+, Ni2+, Cu2+ and Zn2+ ions as Lewis acid catalysts on the rate and endo-exo selectivity of the DA reaction between the bidentate dienophiles

Lewis Information Network (LINK): Background and overview

Science.gov (United States)

Schulte, Roger R.

1987-01-01

The NASA Lewis Research Center supports many research facilities with many isolated buildings, including wind tunnels, test cells, and research laboratories. These facilities are all located on a 350 acre campus adjacent to the Cleveland Hopkins Airport. The function of NASA-Lewis is to do basic and applied research in all areas of aeronautics, fluid mechanics, materials and structures, space propulsion, and energy systems. These functions require a great variety of remote high speed, high volume data communications for computing and interactive graphic capabilities. In addition, new requirements for local distribution of intercenter video teleconferencing and data communications via satellite have developed. To address these and future communications requirements for the next 15 yrs, a project team was organized to design and implement a new high speed communication system that would handle both data and video information in a common lab-wide Local Area Network. The project team selected cable television broadband coaxial cable technology as the communications medium and first installation of in-ground cable began in the summer of 1980. The Lewis Information Network (LINK) became operational in August 1982 and has become the backbone of all data communications and video.

Practicing like Thomas Edison.

Science.gov (United States)

Baum, Neil; Ornstein, Hal

2013-01-01

For many centuries, medicine has practiced in a vacuum, and the healthcare profession has been isolated from other scientific disciplines. Beginning in the 20th century, doctors and scientists have looked to others for ideas, suggestions, innovations, and new technologies. Probably no one in the past hundred years has done so much to change the world than Thomas Edison. This article will discuss eight principles of Edison and how they may apply to our profession and our practices.

78 FR 19632 - Special Local Regulations; St. Thomas Carnival Watersport Activities, Charlotte Amalie Harbor; St...

Science.gov (United States)

2013-04-02

...-AA08 Special Local Regulations; St. Thomas Carnival Watersport Activities, Charlotte Amalie Harbor; St... proposes to establish a special local regulation on the waters of Charlotte Amalie Harbor in St Thomas, USVI during the St. Thomas Carnival Watersport Activities, a high speed boat race. The event is...

SSTI- Lewis Spacecraft Nickel-Hydrogen Battery

Science.gov (United States)

Tobias, R. F.

1997-01-01

Topics considered include: NASA-Small Spacecraft Technology Initiative (SSTI) objectives, SSTI-Lewis overview, battery requirement, two cells Common Pressure Vessel (CPV) design summary, CPV electric performance, battery design summary, battery functional description, battery performance.

Thomas: o primeiro blanchotiano = Thomas: the first Blanchotian

Directory of Open Access Journals (Sweden)

Pimentel, Davi Andrade

2013-01-01

Full Text Available Este artigo analisa a narrativa Thomas l’obscur, de Maurice Blanchot, a partir da configuração da outra noite blanchotiana, noite que apresenta a falta e a ausência da palavra no que ela tem de mais agressiva, de mais excessiva e de mais absurdamente maravilhosa. Neste artigo, tenho como interlocutor teórico os escritos sobre literatura do próprio autor. O interesse nesse diálogo consiste em apresentar a fusão apaixonada de seus escritos ficcionais e teóricos. Em Maurice Blanchot, não há pontos de isolamento e nem de divergência entre seus dois pólos de escritura, mas sim uma complementação, uma convergência, entre o que denominamos de ficção e de teoria

Sudden Death: An Uncommon Occurrence in Dementia with Lewy Bodies.

Science.gov (United States)

Molenaar, Joery P; Wilbers, Joyce; Aerts, Marjolein B; Leijten, Quinten H; van Dijk, Jan G; Esselink, Rianne A; Bloem, Bastiaan R

2016-01-01

We present a 75-year-old woman with dementia and parkinsonism who developed severe orthostatic hypotension and eventually died. Autopsy revealed extensive Lewy body formation in the midbrain, limbic system, intermediate spinal cord, and medulla oblongata. Furthermore, a vast amount of Lewy bodies was seen in the paravertebral sympathetic ganglia which likely explained the severe autonomic failure. We speculate that this autonomic failure caused sudden death through dysregulation of respiration or heart rhythm, reminiscent of sudden death in multiple system atrophy (MSA). Clinicians should be aware of this complication in patients presenting with parkinsonism and autonomic dysfunction, and that sudden death may occur in dementia with Lewy bodies (DLB) as it does in MSA.

Rendezvous, un juego de Lewis Carroll

Directory of Open Access Journals (Sweden)

José Manuel Sánchez Muñoz

2011-10-01

Full Text Available Todos en mayor o menor medida asociamos el nombre de Lewis Carrolla la literatura, sobre todo a la de temática infantil, con títulos a sus espaldas como Alicia en el País de las Maravillas, Alicia a través del espejo, o La Caza del Snark. Pero además de literato, Lewis Carrol fue un hombre con bastantes inquietudes en torno a la matemática, la lógica y el pensamiento filosófico. Pero no todo el mundo es conocedor de su faceta como creativo en el campo de los juegos. Rendezvous es una de sus más sorprendentes invenciones,un juego de inteligencia para todos los públicos, cuyas directrices hacen de él un entretenimiento bastante original.

Ermakov–Lewis invariants and Reid systems

Energy Technology Data Exchange (ETDEWEB)

Mancas, Stefan C., E-mail: stefan.mancas@erau.edu [Department of Mathematics, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114-3900 (United States); Rosu, Haret C., E-mail: hcr@ipicyt.edu.mx [IPICyT, Instituto Potosino de Investigacion Cientifica y Tecnologica, Camino a la presa San José 2055, Col. Lomas 4a Sección, 78216 San Luis Potosí, S.L.P. (Mexico)

2014-06-13

Reid's mth-order generalized Ermakov systems of nonlinear coupling constant α are equivalent to an integrable Emden–Fowler equation. The standard Ermakov–Lewis invariant is discussed from this perspective, and a closed formula for the invariant is obtained for the higher-order Reid systems (m≥3). We also discuss the parametric solutions of these systems of equations through the integration of the Emden–Fowler equation and present an example of a dynamical system for which the invariant is equivalent to the total energy. - Highlights: • Reid systems of order m are connected to Emden–Fowler equations. • General expressions for the Ermakov–Lewis invariants both for m=2 and m≥3 are obtained. • Parametric solutions of the Emden–Fowler equations related to Reid systems are obtained.

Incorporating spectroscopic on-line monitoring as a method of detection for a Lewis cell setup

Energy Technology Data Exchange (ETDEWEB)

Heller, Forrest D.; Casella, Amanda J.; Lumetta, Gregg J.; Nash, Kenneth L.; Sinkov, Sergey I.; Bryan, Samuel A.

2017-01-01

A Lewis cell was designed and constructed for investigating solvent extraction systems by spectrophotometrically monitoring both the organic and aqueous phases in real time. This new Lewis cell was tested and shown to perform well compared to other previously reported Lewis cell designs. The advantage of the new design is that the spectroscopic measurement allows determination of not only metal ion concentrations, but also information regarding chemical speciation—information not available with previous Lewis cell designs. For convenience, the new Lewis cell design was dubbed COSMOFLEX (COntinuous Spectroscopic MOnitoring of Forrest’s Liquid-liquid EXtraction cell).

Cholera in Thomas Mann's Death in Venice.

Science.gov (United States)

Rütten, Thomas

2009-01-01

The article sets the cholera motif in Thomas Mann's famous novella Death in Venice against the historical context from which it partially originates. It is shown that this motif, while undoubtedly appropriated to serve Mann's own poetic ends, has a solid grounding in historical and autobiographical fact, thus blurring the boundaries between fact and fiction. The article illustrates the verifiable events of the outbreak of the Venetian cholera epidemic in May 1911, which Mann partly witnessed himself, during a holiday trip to Brioni and Venice, and partly heard and read about. It is established that Thomas Mann's account of the cholera in Venice in his novella is characterised by a rare and almost preternatural insightfulness into an otherwise murky affair that was marked by rumours, speculations and denials.

Edward B Lewis (1918–2004)

Indian Academy of Sciences (India)

Administrator

Ed Lewis spent his life working on the genetics of Dro- sophila with ... bithorax mutations, in which organs that control balance ... His pioneering work on homeotic genes induced ... a close and cooperative family within the larger scientific.

Catalytic Conversion of Glucose into 5-Hydroxymethylfurfural by Hf(OTf4 Lewis Acid in Water

Directory of Open Access Journals (Sweden)

Junjie Li

2015-12-01

Full Text Available A series of Lewis acidic metal salts were used for glucose dehydration to 5-hydroymethylfurfural (HMF in water. Effect of valence state, ionic radii of Lewis acidic cation, and the type of anions on the catalytic performance have been studied systematically. The experimental results showed that the valence state played an important role in determining catalytic activity and selectivity. It was found that a higher glucose conversion rate and HMF selectivity could be obtained over high valent Lewis acid salts, where the ionic radii of these Lewis acidic metal salts are usually relatively small. Analysis on the effect of the anions of Lewis acid salts on the catalytic activity and the selectivity suggested that a higher glucose conversion and HMF selectivity could be readily obtained with Cl−. Furthermore, the recyclability of high valence state Lewis acid salt was also studied, however, inferior catalytic performance was observed. The deactivation mechanism was speculated to be the fact that high valence state Lewis acid salt was comparatively easier to undergo hydrolysis to yield complicated metal aqua ions with less catalytic activity. The Lewis acidic activity could be recovered by introducing a stoichiometric amount of hydrochloric acid (HCl to the catalytic before the reaction.

Lewis-Acid/Base Effects on Gallium Volatility in Molten Chlorides

International Nuclear Information System (INIS)

Williams, D.F.

2001-01-01

It has been proposed that GaCl 3 can be removed by direct volatilization from a Pu-Ga alloy that is dissolved in a molten chloride salt. Although pure GaCl 3 is quite volatile (boiling point, 201 C), the behavior of GaCl 3 dissolved in chloride salts is different due to solution effects and is critically dependent on the composition of the solvent salt (i.e., its Lewis-acid/base character). In this report, the behavior of gallium in prototypical Lewis-acid and Lewis-base salts is compared. It was found that gallium volatility is suppressed in basic melts and enhanced in acidic melts. The implications of these results on the potential for simple gallium removal in molten salt systems are significant

Capgras' syndrome in dementia with Lewy bodies.

Science.gov (United States)

Marantz, Andrew G; Verghese, Joe

2002-01-01

We report the occurrence of Capgras' syndrome, or the delusion of doubles, in a patient with dementia with Lewy bodies. The patient believed that several similar-looking impostors had replaced his wife of over 50 years. Uncharacteristically, he adopted a friendly attitude with these impostors. This unusual convivial reaction to the impostors may result from differential involvement of the dual visual pathways processing facial recognition and emotional responses to faces. The delusion resolved spontaneously, coincident with worsening of the dementia. In a retrospective chart review of 18 autopsy-confirmed cases of dementia with Lewy bodies, delusions were reported in 5 subjects (27.8%), of whom 1 had misidentification delusions much like Capgras' syndrome.

Fugle og andre observationer på Lewis og Harris

DEFF Research Database (Denmark)

Provencal, Philippe

2017-01-01

En beskrivelse af observationer af især fugle men også nogle få pattedyr på øen Lewis and Harris i de Ydre Hebrider. Observationerne fandt sted fra den 19. til den 23- april 2017.......En beskrivelse af observationer af især fugle men også nogle få pattedyr på øen Lewis and Harris i de Ydre Hebrider. Observationerne fandt sted fra den 19. til den 23- april 2017....

Lewis and Clark as Naturalists.

Science.gov (United States)

Smithsonian Institution, Washington, DC. National Museum of Natural History.

Intended for use in elementary and high school education, this Web site includes a teacher's guide and three lesson plans. The site contains images of museum specimens, scientific drawings, and field photos of the plant and animal species observed by Meriwether Lewis and William Clark, along with journal excerpts, historical notes, and references…

Thomas Jefferson and the Purposes of Education.

Science.gov (United States)

Jewett, Thomas O.

1997-01-01

Thomas Jefferson was the first conspicuous U.S. advocate of free education supported by local taxation and of state aid to higher education. He believed that only an educated citizenry could assume the responsibilities of self-government. (SK)

Caribbean ST Thomas trap Logbook Survey (Vessels)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains catch (landed catch) and effort for fishing trips made by vessels fishing in St. Thomas. The catch and effort data for the entire trip are...

Safety Performance Improvement for Nuclear Power Plants Utilizing THOMAS

International Nuclear Information System (INIS)

Kim, Won June; Ryu, Jung Uk; Suh, Kune Y.

2005-01-01

THOMAS (Thermal Hydraulics Online Monitoring Advisory System) is equipped with a couple of salient features compared with existing monitoring systems. The first has to do with the three-dimensional (3D) visualization technique to support the nuclear power plant (NPP) operators and personnel using the virtual reality (VR) technology. VR depicts an environment simulated by a computer. Most of the VR environments primarily include visual experiences, displayed either on a monitor or though special stereoscopic goggles. Users can often interactively manipulate a VR environment, either through standard input devices like a keyboard, or through specially designed devices like a cybergloves. Additional devices were not applied the in THOMAS. The visualized model file is brought to the VR space from the computer-aided design (CAD) tool. In the VR space, using mapping, the component color is changed with linked value of the safety variables. Operators thus can easily recognize the plant condition. This is related with the human factor engineering. The second is the function of decision making using the influence diagram logic. The influence diagram logic is based on the total probability and Bayesian theory. The accident modeling is rooted in the emergency operating procedure (EOP). The final goal of this system is, in the accident situation, to present a success path to the operator for the recovery of the NPP system. At the current developing level, the database signals THOMAS. In other words, a spectrum of system analysis codes provides the safety parameter values to the database, which are subsequently supplied to THOMAS through the network

Fullerene–Carbene Lewis Acid–Base Adducts

KAUST Repository

Li, Huaping; Risko, Chad; Seo, Jung Hwa; Campbell, Casey; Wu, Guang; Brédas, Jean-Luc; Bazan, Guillermo C.

2011-01-01

The reaction between a bulky N-heterocylic carbene (NHC) and C60 leads to the formation of a thermally stable zwitterionic Lewis acid-base adduct that is connected via a C-C single bond. Low-energy absorption bands with weak oscillator strengths

Thomas Vicary, barber-surgeon.

Science.gov (United States)

Thomas, Duncan P

2006-05-01

An Act of Parliament in 1540 uniting the barbers and surgeons to form the Barber-Surgeons' Company represented an important foundation stone towards better surgery in England. Thomas Vicary, who played a pivotal role in promoting this union, was a leading surgeon in London in the middle of the 16th century. While Vicary made no direct contribution to surgical knowledge, he should be remembered primarily as one who contributed much towards the early organization and teaching of surgery and to the consequent benefits that flowed from this improvement.

C. S. Lewis: The Romantic Rationalist

Directory of Open Access Journals (Sweden)

Vasiliu Daniela

2014-12-01

Full Text Available The paper “C. S. Lewis: The Romantic Rationalist” presents the way C. S. Lewis gives an account in his first fictional (allegorical book, The Pilgrim’s Regress, of how he discovered Christianity on the converging paths of romanticism and rationalism. The outstanding scholar and author whose intellectual and spiritual development has turned him into one of the most influential Christian writers of the twentieth century became an atheist in his teens and after a long journey through different philosophical convictions he converted to Christianity in his early thirties, a change that affected his entire work. His love of literature was essential in discovering both the rational and the imaginative appeal of Christianity, which led him into a vision of the reality of the world and of life that satisfied the longing of his heart and the hunger of his imagination.

del Nido versus St. Thomas Cardioplegia Solutions: A Single-Center Retrospective Analysis of Post Cross-Clamp Defibrillation Rates.

Science.gov (United States)

Buel, Shane T; Striker, Carrie Whittaker; O'Brien, James E

2016-06-01

There are many cardioplegia solutions currently in use for pediatric cardiopulmonary bypass (CPB). The most common being del Nido solution. Another common cardioplegia solution used for pediatric CPB is St. Thomas. In October 2014, Children's Mercy Kansas City changed from the use of modified St. Thomas to del Nido. This study compared rates of post cross-clamp fibrillation requiring defibrillation between del Nido solution and modified St. Thomas solution stratified by weight at Children's Mercy Kansas City. This retrospective study consisted of 394 patients who underwent cardiac surgery requiring cardioplegia between January 1, 2014 and July 31, 2015. The outcome measured was defibrillation upon cross-clamp removal. Statistical significance was determined using Fishers exact test with a two-sided significance level of .05. Incidence of defibrillation post cross-clamp removal was 4.4% in the del Nido group and 26.8% in the St. Thomas group (p Thomas group (p Thomas group (p Thomas group (p 60-kg category had an incidence of defibrillation of 16.7% in the del Nido group and 63% in the St. Thomas group (p Thomas and del Nido cardioplegia solutions. Analyses of weight stratifications demonstrate a decrease in the rate of defibrillation post cross-clamp removal in all categories within the del Nido group.

Lewis Research Center space station electric power system test facilities

Science.gov (United States)

Birchenough, Arthur G.; Martin, Donald F.

1988-01-01

NASA Lewis Research Center facilities were developed to support testing of the Space Station Electric Power System. The capabilities and plans for these facilities are described. The three facilities which are required in the Phase C/D testing, the Power Systems Facility, the Space Power Facility, and the EPS Simulation Lab, are described in detail. The responsibilities of NASA Lewis and outside groups in conducting tests are also discussed.

New Jersey's Thomas Edison and the fluoroscope.

Science.gov (United States)

Tselos, G D

1995-11-01

Thomas Edison played a major role in the development of early x-ray technology in 1896, notably increasing tube power and reliability and making the fluoroscope a practical instrument. Eventually, Edison would move x-ray technology from the laboratory to the marketplace.

Thomas Hiärne - nimi Rootsi Läänemereprovintside varasest ajalookirjutusest / Piret Lotman

Index Scriptorium Estoniae

Lotman, Piret, 1950-

2008-01-01

Thomase isa Erlandi karjäärist. Thomas Hiärne headest suhetest Eestimaa kindralkuberneri Bengt Horniga. Thomas Hiärne kandideerimisest Ingerimaa rüütelkonna sekretäri kohale. Tema tegevusest Virtsu mõisa inspektorina. Hiärne kroonikast ja ajalookäsitlusest

Liquid-Phase Catalytic Transfer Hydrogenation of Furfural over Homogeneous Lewis Acid-Ru/C Catalysts.

Science.gov (United States)

Panagiotopoulou, Paraskevi; Martin, Nickolas; Vlachos, Dionisios G

2015-06-22

The catalytic performance of homogeneous Lewis acid catalysts and their interaction with Ru/C catalyst are studied in the catalytic transfer hydrogenation of furfural by using 2-propanol as a solvent and hydrogen donor. We find that Lewis acid catalysts hydrogenate the furfural to furfuryl alcohol, which is then etherified with 2-propanol. The catalytic activity is correlated with an empirical scale of Lewis acid strength and exhibits a volcano behavior. Lanthanides are the most active, with DyCl3 giving complete furfural conversion and a 97 % yield of furfuryl alcohol at 180 °C after 3 h. The combination of Lewis acid and Ru/C catalysts results in synergy for the stronger Lewis acid catalysts, with a significant increase in the furfural conversion and methyl furan yield. Optimum results are obtained by using Ru/C combined with VCl3 , AlCl3 , SnCl4 , YbCl3 , and RuCl3 . Our results indicate that the combination of Lewis acid/metal catalysts is a general strategy for performing tandem reactions in the upgrade of furans. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Freqüências relativas dos fenótipos eritrocitários ABO e Lewis na doença de Jorge Lobo Frequencies of ABO and Lewis blood groups in Jorge Lobo's disease

Directory of Open Access Journals (Sweden)

Eliane A. Silva

2004-03-01

Full Text Available A doença de Jorge Lobo é uma micose de evolução crônica, causada pelo Lacazia loboi. Os mecanismos envolvidos na suscetibilidade/resistência do hospedeiro frente ao agente não estão ainda elucidados, dentre eles encontra-se a constituição genética. Portanto, o objetivo deste trabalho é avaliar a distribuição dos grupos sangüíneos ABO e Lewis de pacientes com doença de Jorge Lobo em relação à população geral. Foram analisados 13 pacientes provenientes do estado do Acre, 60 indivíduos da região de Bauru (SP não acometidos pela doença em estudo (grupo controle Lewis e 2.673 doadores do Banco de Sangue da cidade de Rio Branco (AC como grupo controle ABO. As presenças dos antígenos eritrocitários foram determinadas pela reação de aglutinação em tubo através dos soros anti-AB, anti-A e anti-B para o fenótipo ABO e dos soros anti-Lewis a e Lewis b para fenotipagem Lewis. As freqüências fenotípicas Lewis e ABO nos pacientes e nos controles são, respectivamente: Le (a- b+ = 54,0% X 72,0%, Le (a+ b- = 15,0% X 6,0%, Le (a- b- = 31,0% X 22,0% ; A =15,4% X 33,6%, B = 30,8% X 10,8%, O = 53,8% X 52,9%, AB = 0 X 2,7%. Embora não tenhamos encontrado resultados estatisticamente significantes, nossos achados sugerem existir suscetibilidade à doença de Jorge Lobo em indivíduos com fenótipo B e com menor freqüência fenotípica Lewis b, conferindo assim um grau de importância epidemiológica como grupo de risco naquele meio ambiente.Jorge Lobo's disease is a mycosis with chronic evolution caused by the fungus Lacazia loboi. The mechanisms involved in host resistance and susceptibility to the agent, including aspects relating to the genetic background, are still not clear. The objective of the present study, therefore, is to evaluate the ABO and Lewis blood group distributions in Jorge Lobo's disease patients compared to the general population. Thirteen patients from Acre state, 60 healthy individuals (Lewis control group

Thomas precession for dressed particles

Science.gov (United States)

Oblak, Blagoje

2018-03-01

We consider a particle dressed with boundary gravitons in three-dimensional Minkowski space. The existence of BMS transformations implies that the particle’s wavefunction picks up a Berry phase when subjected to changes of reference frames that trace a closed path in the asymptotic symmetry group. We evaluate this phase and show that, for BMS superrotations, it provides a gravitational generalization of Thomas precession. In principle, such phases are observable signatures of asymptotic symmetries.

Lewis' Educational and Research Collaborative Internship Program

Science.gov (United States)

Heyward, Ann; Gott, Susan (Technical Monitor)

2004-01-01

The Lewis Educational and Research Collaborative Internship Program (LERCIP) is a collaborative undertaking by the Office of Educational Programs at NASA Glenn Research Center at Lewis Field (formerly NASA Lewis Research Center) and the Ohio Aerospace Institute. This program provides 10-week internships in addition to summer and winter extensions if funding is available and/or is requested by mentor (no less than 1 week no more than 4 weeks) for undergraduate/graduate students and secondary school teachers. Students who meet the travel reimbursement criteria receive up to $500 for travel expenses. Approximately 178 interns are selected to participate in this program each year and begin arriving the fourth week in May. The internships provide students with introductory professional experiences to complement their academic programs. The interns are given assignments on research and development projects under the personal guidance of NASA professional staff members. Each intern is assigned a NASA mentor who facilitates a research assignment. In addition to the research assignment, the summer program includes a strong educational component that enhances the professional stature of the participants. The educational activities include a research symposium and a variety of workshops, and lectures. An important aspect of the program is that it includes students with diverse social, cultural and economic backgrounds. The purpose of this report is to document the program accomplishments for 2004.

Barack Obama, John Lewis, and the Legacy of the Civil Rights Struggle

Directory of Open Access Journals (Sweden)

Glenn T. Eskew

2012-01-01

Full Text Available The watershed election in 2008 of Barack Obama as the first President of the United States to have African ancestry resulted from the life work of such civil rights activists as U.S. Congressman John Lewis. Born on a sharecropper’s farm in 1940, the African American Lewis grew up in segregated Alabama. As a college student in Nashville, he joined the sit-in protests and volunteered for the original Freedom Ride in 1961. He was elected chairman of the Student Nonviolent Coordinating Committee, becoming the youngest speaker at the March on Washington in 1963. The radical shift to Black ultimately forced Lewis out of SNCC. Consequently Lewis capitalized on the Voting Rights Act of 1965, turned his attentions to voter registration campaigns, and continued working within the system. In 1986 he won election to the U.S. House of Representatives to represent Atlanta’s Fifth Congressional District, a seat he continues to hold today.

The Critical Reception of Lewis Nordan

DEFF Research Database (Denmark)

Bjerre, Thomas Ærvold

2010-01-01

The essay covers the critical reception of Mississippi-writer Lewis Nordan from his debut in 1983 to the boost in scholarly attention in the new millennium. The essay covers newspaper reviews but pays particular attention to the many academic essays that have placed Nordan as a writer...

The Ecclesiological Contributions of Thomas Helwys’s Reformation in a Baptist Context

Directory of Open Access Journals (Sweden)

Jones Marvin

2017-12-01

Full Text Available The English Separatist movement provided the background for which John Smyth and Thomas Helwys emerged to reconstitute a biblical ecclesiology. Through the study of the New Testament, they came to the position that infant baptism and covenantal theology could not be the foundation for the New Testament church. Both men embraced believer’s baptism as the basic foundation in which a recovered church should be built. Unfortunately, Smyth defected to the Mennonites, leaving Thomas Helwys to continue the fledging work known as Baptists. This article will examine the life of Thomas Helwys and his contribution to Baptist ecclesiology; it will also review selected literary works that contributed to the recovery of a New Testament church and the founding of Baptist ecclesiology.

Thomas van Aquino en de Thomas van Utrecht. Kritische kanttekeningen bij de Utrechtse lezing van de Summa Theologiae

NARCIS (Netherlands)

Aertsen, J.A.

1994-01-01

In the last decade a group of scholars at the Catholic University of Utrecht developed an approach of its own to Aquinas's Summa theologiae, which is named “the Utrecht hypothesis”. In section I this hypothesis is summarized in eight propositions. Its main elements are twofold. (A) Thomas does not

Instantons, quivers and noncommutative Donaldson-Thomas theory

Science.gov (United States)

Cirafici, Michele; Sinkovics, Annamaria; Szabo, Richard J.

2011-12-01

We construct noncommutative Donaldson-Thomas invariants associated with abelian orbifold singularities by analyzing the instanton contributions to a six-dimensional topological gauge theory. The noncommutative deformation of this gauge theory localizes on noncommutative instantons which can be classified in terms of three-dimensional Young diagrams with a colouring of boxes according to the orbifold group. We construct a moduli space for these gauge field configurations which allows us to compute its virtual numbers via the counting of representations of a quiver with relations. The quiver encodes the instanton dynamics of the noncommutative gauge theory, and is associated to the geometry of the singularity via the generalized McKay correspondence. The index of BPS states which compute the noncommutative Donaldson-Thomas invariants is realized via topological quantum mechanics based on the quiver data. We illustrate these constructions with several explicit examples, involving also higher rank Coulomb branch invariants and geometries with compact divisors, and connect our approach with other ones in the literature.

Instantons, quivers and noncommutative Donaldson-Thomas theory

Energy Technology Data Exchange (ETDEWEB)

Cirafici, Michele, E-mail: cirafici@math.ist.utl.pt [Centro de Analise Matematica, Geometria e Sistemas Dinamicos, Departamento de Matematica, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa (Portugal); Sinkovics, Annamaria, E-mail: A.Sinkovics@damtp.cam.ac.uk [Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom); Szabo, Richard J., E-mail: R.J.Szabo@ma.hw.ac.uk [Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS (United Kingdom); Maxwell Institute for Mathematical Sciences, Edinburgh (United Kingdom)

2011-12-11

We construct noncommutative Donaldson-Thomas invariants associated with abelian orbifold singularities by analyzing the instanton contributions to a six-dimensional topological gauge theory. The noncommutative deformation of this gauge theory localizes on noncommutative instantons which can be classified in terms of three-dimensional Young diagrams with a colouring of boxes according to the orbifold group. We construct a moduli space for these gauge field configurations which allows us to compute its virtual numbers via the counting of representations of a quiver with relations. The quiver encodes the instanton dynamics of the noncommutative gauge theory, and is associated to the geometry of the singularity via the generalized McKay correspondence. The index of BPS states which compute the noncommutative Donaldson-Thomas invariants is realized via topological quantum mechanics based on the quiver data. We illustrate these constructions with several explicit examples, involving also higher rank Coulomb branch invariants and geometries with compact divisors, and connect our approach with other ones in the literature.

Surveys in 1961 on St. Thomas & St. Croix

DEFF Research Database (Denmark)

Dahl, Thorkel; Licht, Kjeld de Fine

Registration of towns and buildings erected during the Danish reign of the Caribbean Isles of St. Thomas, St. Jan and St. Croix 1671-1917 (now belonging to the USA under the name of Virgin Islands)....

Lewis acid-catalyzed depolymerization of soda lignin in supercritical ethanol/water mixtures

NARCIS (Netherlands)

Güvenatam, Burcu; Heeres, Erik H.J.; Pidko, Evgeny A.; Hensen, Emiel J M

2016-01-01

The depolymerization of lignin model compounds and soda lignin by super Lewis acidic metal triflates has been investigated in a mixture of ethanol and water at 400 °C. The strong Lewis acids convert representative model compounds for the structure-forming linkages in lignin, namely α-O-4, 5-O-4

A dual Lewis base activation strategy for enantioselective carbene-catalyzed annulations.

Science.gov (United States)

Izquierdo, Javier; Orue, Ane; Scheidt, Karl A

2013-07-24

A dual activation strategy integrating N-heterocyclic carbene (NHC) catalysis and a second Lewis base has been developed. NHC-bound homoenolate equivalents derived from α,β-unsaturated aldehydes combine with transient reactive o-quinone methides in an enantioselective formal [4 + 3] fashion to access 2-benzoxopinones. The overall approach provides a general blueprint for the integration of carbene catalysis with additional Lewis base activation modes.

75 FR 78335 - Culturally Significant Objects Imported for Exhibition Determinations: “Thomas Lawrence: Regency...

Science.gov (United States)

2010-12-15

... DEPARTMENT OF STATE [Public Notice 7268] Culturally Significant Objects Imported for Exhibition Determinations: ``Thomas Lawrence: Regency Power and Brilliance'' SUMMARY: Notice is hereby given of the... determine that the objects to be included in the exhibition ``Thomas Lawrence: Regency Power and Brilliance...

Caribbean ST Thomas all gears Logbook Survey (Vessels)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains catch (landed catch) and effort for fishing trips made by vessels fishing in St. Thomas. The catch and effort data for the entire trip are...

Thomas Edison’s Poetry Machine

OpenAIRE

Rubery, Matthew

2014-01-01

The tradition of spoken-word recording began with Thomas Edison’s invention of the phonograph. Hence, this article makes the case that 1878 is a more important year to the history of literature than has yet been recognized for its experiments with verse and sound-recording technology. Although the tinfoil phonograph’s first decade has been well documented by media historians, literary critics have singled out 1888 as the noteworthy year since that is when Edison’s improved phonograph made it ...

Dylan Thomas's "25 Poems": Paradox as Structure

Science.gov (United States)

Bharadwaj, S.

2014-01-01

Irony, inclusiveness, and complexity are the chief criteria of value in the twentieth century intellectual poetry. These criteria, however, do not merely indicate qualities of craftsmanship; they reflect a sensibility, a particular way of experiencing reality. What really distinguishes Dylan Thomas is a capacity for self-analysis, a capacity for…

Physical Holonomy, Thomas Precession, and Clifford Algebra

International Nuclear Information System (INIS)

Urbantke, H.

1988-01-01

After a general discussion of the physical significance of holonomy group transformations, a relation between the transports of Fermi-Walker and Levi-Civita in Special Relativity is pointed out. A well-known example -the Thomas-Wigner angle - is rederived in a completely frame-independent manner using Clifford algebra. 14 refs. (Author)

Frustrated Lewis pairs-assisted tritium labeling

Czech Academy of Sciences Publication Activity Database

Marek, Aleš; Široká, Sabina; Elbert, Tomáš

2016-01-01

Roč. 14, č. 5 (2016), s. 219 ISSN 2336-7202. [Sjezd českých a slovenských chemických společností /68./. 04.09.2016-07.09.2016, Praha] Institutional support: RVO:61388963 Keywords : frustrated Lewis pairs * one-pot synthesis * tritium -labeling Subject RIV: CC - Organic Chemistry

One hundred years of Lewis Chemical Bond!

Indian Academy of Sciences (India)

2016-09-20

Sep 20, 2016 ... was a conceptual quantum jump, coming more than a decade ahead of ... did use a 'cubic model of atoms' with eight electrons in their corners, he realized that ... started referring to these advances as Lewis-Langmuir theory.

The poor in the Epistle of James and the Gospel of Thomas

Directory of Open Access Journals (Sweden)

Patrick J. Hartin

1997-12-01

Full Text Available This study explores similarities in the thought world of the Epistle of James and the Gospel of Thomas. Particular attention is devoted to the role that the 'poor' and 'poverty' play in both documents. For the Epistle of James it is 'the poor in the world that God has chosen to be rich in faith and heirs of the kingdom' (Ja 2:5.  In a similar vein, in the Gospel of Thomas the kingdom is promised to those who have embraced the poverty of a radical life-style: 'Blessed are the poor, for yours is the kingdom of heaven' (GTh 54. This outlook betrays a basic ethos adopted toward the world. In both the Epistle of James and the Gospel of Thomas the relationship to the world ultimately determines one's relationship to the kingdom or to God. For the Epistle of James the very definition of religion demands that one keep 'oneself unstained from  the world' (Ja 1 :27 and that 'friendship with the world' is enmity with God (Ja 4:4. For the Gospel of Thomas the rejection of the world involves a radical ethos that embraces an intinerant life ('Be passersby' [GTh 42J, which includes a rejection of wealth (GTh 63.'If you do not abstain from the world, you will not find the kingdom' (GTh 27. It is argued that the Gospel of Thomas and the Epistle of James reflect traditional sayings that endorse a similar ethos of radical discipleship.

Stochastic Modeling of Rainfall in Peninsular Malaysia Using Bartlett Lewis Rectangular Pulses Models

Directory of Open Access Journals (Sweden)

Ibrahim Suliman Hanaish

2011-01-01

Full Text Available Three versions of Bartlett Lewis rectangular pulse rainfall models, namely, the Original Bartlett Lewis (OBL, Modified Bartlett Lewis (MBL, and 2N-cell-type Bartlett Lewis model (BL2n, are considered. These models are fitted to the hourly rainfall data from 1970 to 2008 obtained from Petaling Jaya rain gauge station, located in Peninsular Malaysia. The generalized method of moments is used to estimate the model parameters. Under this method, minimization of two different objective functions which involve different weight functions, one weight is inversely proportional to the variance and another one is inversely proportional to the mean squared, is carried out using Nelder-Mead optimization technique. For the purpose of comparison of the performance of the three different models, the results found for the months of July and November are used for illustration. This performance is assessed based on the goodness of fit of the models. In addition, the sensitivity of the parameter estimates to the choice of the objective function is also investigated. It is found that BL2n slightly outperforms OBL. However, the best model is the Modified Bartlett Lewis MBL, particularly when the objective function considered involves weight which is inversely proportional to the variance.

A Model Technology Educator: Thomas A. Edison

Science.gov (United States)

Pretzer, William S.; Rogers, George E.; Bush, Jeffery

2007-01-01

Reflecting back over a century ago to the small village of Menlo Park, New Jersey provides insight into a remarkable visionary and an exceptional role model for today's problem-solving and design-focused technology educator: Thomas A. Edison, inventor, innovator, and model technology educator. Since Edison could not simply apply existing knowledge…

Thomas of Wroclaw (1297-1378) - Medieval bishop and scholar of English origin.

Science.gov (United States)

Bieganowski, Lech; Grzybowski, Andrzej

2017-11-01

Peter of Tilleberi (Tilbury), later known as bishop Thomas of Wroclaw, after completing his studies (in Bologna or in Montpellier) worked as a physician in northern Italy and probably in Spain. Later through Germany and Bohemia, he came to Wroclaw in 1336 where he joined the Order of St. Dominic. In 1352, Thomas was made an auxiliary bishop of the diocese of Wroclaw. After the episcopal consecration, Thomas stopped living in the abbey, but all the time he was well known both as a priest and physician. He is known as an author of several treatises on medical sciences. His most important work entitled Michi competit (i.e. It suits me) is composed of four parts: Regimen sanitatis (i.e. Hygiene), Aggregatum (i.e. Aggregation), Antidotarium (i.e. Medicine directory) and Practica medicinalis (i.e. Medical practices). Moreover, he is the author of other treatises including, for example, De phlebotomia et de iudiciis cruoris (i.e. On phlebotomy and blood content) and De urinis (i.e. On urine). Some Polish scientists claim that bishop Thomas of Wroclaw with his knowledge and industriousness functioned as a university faculty of medicine even though the University of Cracow had not been established yet.

Lewis Research Center studies of multiple large wind turbine generators on a utility network

Science.gov (United States)

Gilbert, L. J.; Triezenberg, D. M.

1979-01-01

A NASA-Lewis program to study the anticipated performance of a wind turbine generator farm on an electric utility network is surveyed. The paper describes the approach of the Lewis Wind Energy Project Office to developing analysis capabilities in the area of wind turbine generator-utility network computer simulations. Attention is given to areas such as, the Lewis Purdue hybrid simulation, an independent stability study, DOE multiunit plant study, and the WEST simulator. Also covered are the Lewis mod-2 simulation including analog simulation of a two wind turbine system and comparison with Boeing simulation results, and gust response of a two machine model. Finally future work to be done is noted and it is concluded that the study shows little interaction between the generators and between the generators and the bus.

NASA Lewis advanced IPV nickel-hydrogen technology

Science.gov (United States)

Smithrick, John J.; Britton, Doris L.

1993-01-01

Individual pressure vessel (IPV) nickel-hydrogen technology was advanced at NASA Lewis and under Lewis contracts. Some of the advancements are as follows: to use 26 percent potassium hydroxide electrolyte to improve cycle life and performance, to modify the state of the art cell design to eliminate identified failure modes and further improve cycle life, and to develop a lightweight nickel electrode to reduce battery mass, hence reduce launch and/or increase satellite payload. A breakthrough in the LEO cycle life of individual pressure vessel nickel-hydrogen battery cells was reported. The cycle life of boiler plate cells containing 26 percent KOH electrolyte was about 40,000 accelerated LEO cycles at 80 percent DOD compared to 3,500 cycles for cells containing 31 percent KOH. Results of the boiler plate cell tests have been validated at NWSC, Crane, Indiana. Forty-eight ampere-hour flight cells containing 26 and 31 percent KOH have undergone real time LEO cycle life testing at an 80 percent DOD, 10 C. The three cells containing 26 percent KOH failed on the average at cycle 19,500. The three cells containing 31 percent KOH failed on the average at cycle 6,400. Validation testing of NASA Lewis 125 Ah advanced design IPV nickel-hydrogen flight cells is also being conducted at NWSC, Crane, Indiana under a NASA Lewis contract. This consists of characterization, storage, and cycle life testing. There was no capacity degradation after 52 days of storage with the cells in the discharged state, on open circuit, 0 C, and a hydrogen pressure of 14.5 psia. The catalyzed wall wick cells have been cycled for over 22,694 cycles with no cell failures in the continuing test. All three of the non-catalyzed wall wick cells failed (cycles 9,588; 13,900; and 20,575). Cycle life test results of the Fibrex nickel electrode has demonstrated the feasibility of an improved nickel electrode giving a higher specific energy nickel-hydrogen cell. A nickel-hydrogen boiler plate cell using an 80

Lewis acid controlled regioselectivity in styrene hydrocyanation

NARCIS (Netherlands)

Bini, L.; Pidko, E.A.; Müller, C.; Santen, van R.A.; Vogt, D.

2009-01-01

According to present knowledge, the Ni-catalyzed hydrocyanation of styrene leads predominantly to the branched product 2-phenylpropionitrile (98%). We observed a dramatic inversion of the regioselectivity upon addition of a Lewis acid. Up to 83 % of the linear product 3-phenylpropionitrile was

Cohomological gauge theory, quiver matrix models and Donaldson-Thomas theoryCohomological gauge theory, quiver matrix models and Donaldson-Thomas theory

NARCIS (Netherlands)

Cirafici, M.; Sinkovics, A.; Szabo, R.J.

2009-01-01

We study the relation between Donaldson–Thomas theory of Calabi–Yau threefolds and a six-dimensional topological Yang–Mills theory. Our main example is the topological U(N) gauge theory on flat space in its Coulomb branch. To evaluate its partition function we use equivariant localization techniques

Thomas Piketty and the Justice of Education

Science.gov (United States)

Bøyum, Steinar

2016-01-01

Thomas Piketty's "Capital in the Twenty-First Century" is best known for its documentation of increasing social inequality, but it also has a notable normative aspect. Although Piketty is far less clear on the normative level than on the empirical, his view of justice can be summarised as meritocratic luck egalitarianism. This leads him…

75 FR 52023 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2010-08-24

... DEPARTMENT OF THE INTERIOR National Park Service Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service... of the Thomas Burke Memorial Washington State Museum (Burke Museum), University of Washington...

75 FR 36672 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2010-06-28

... DEPARTMENT OF THE INTERIOR National Park Service Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service... of the Thomas Burke Memorial Washington State Museum (Burke Museum), University of Washington...

Oral Interpretation of C.S. Lewis'"Narnia Tales": A Refracting of "Pictures."

Science.gov (United States)

Keefe, Carolyn

"The Chronicles of Narnia" are a series of seven fairy tales written by C.S. Lewis that have become popular with both children and adults. Lewis points to five aspects of the fairy tale form that made the form suitable for expressing the images he saw. The aspects are: (1) no love interest; (2) no close psychology; (3) severe restraints…

A chromatographic study of the Lewis acid-base chemistry of zirconia surfaces

International Nuclear Information System (INIS)

Blackwell, J.A.; Carr, P.W.

1991-01-01

This paper reports on the chromatographic properties of porous microparticulate zirconium oxide surfaces in aqueous media which are highly dependent upon the chemical composition of the eluent. In particular, retention is controlled by the type and concentration of hard Ligand exchange is the dominant mechanism for the retention of solutes which are Lewis bases. consequently, the capacity factor and plate height depend on both the thermodynamic and kinetic properties of whatever competing Lewis bases may be present in the eluent. These Lewis base eluent components act to control retention in two ways. They modify the net ligand exchange contribution to retention, and they serve as sites for secondary interactions, such as hydrogen bonding and hydrophobic interactions between solutes and the dynamic stationary phase

76 FR 58033 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2011-09-19

... DEPARTMENT OF THE INTERIOR National Park Service [2253-665] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington State Museum (Burke...

75 FR 36671 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2010-06-28

... DEPARTMENT OF THE INTERIOR National Park Service Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA; Correction AGENCY: National Park... human remains and associated funerary objects in the possession of the Thomas Burke Memorial Washington...

76 FR 58034 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2011-09-19

... DEPARTMENT OF THE INTERIOR National Park Service [2253-665] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington State Museum (Burke...

76 FR 58039 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2011-09-19

... DEPARTMENT OF THE INTERIOR National Park Service [2253-665] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington State Museum (Burke...

Thomas Mofolo's sentence design in Chaka approached in translation

African Journals Online (AJOL)

Thomas Mofolo's sentence design in Chaka approached in translation. ... by responding to several compelling questions, ranging from how five translators of the work approached it in their respective languages ... AJOL African Journals Online.

Teaching the "Leviathan": Thomas Hobbes on Education

Science.gov (United States)

Bejan, Teresa M.

2010-01-01

This paper considers Thomas Hobbes's educational thought both in its historical context and in the context of his political philosophy as a whole. It begins with Hobbes's diagnosis of the English Civil War as the product of the miseducation of the commonwealth and shows that education was a central and consistent concern of his political theory…

Nest-site selection and nest survival of Lewis's woodpecker in aspen riparian woodlands

Science.gov (United States)

Karen R. Newlon; Victoria A. Saab

2011-01-01

Riparian woodlands of aspen (Populus tremuloides) provide valuable breeding habitat for several cavity-nesting birds. Although anecdotal information for this habitat is available for Lewis's Woodpecker (Melanerpes lewis), no study has previously examined the importance of aspen woodlands to this species' breeding biology. From 2002 to 2004, we monitored 76...

Thomas Secker M.D.: Archbishop and man-midwife.

Science.gov (United States)

Morgan-Guy, John

2018-05-01

This paper provides a biographical outline of the career of Thomas Secker, MD, who from 1758-68 was Archbishop of Canterbury. Although much has been written on Secker, this study seeks to highlight his training in medicine, which has been largely overlooked hitherto by historians.

77 FR 46117 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2012-08-02

... DEPARTMENT OF THE INTERIOR National Park Service [NPS-WASO-NAGPRA-10823; 2200-1100-665] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington...

78 FR 11675 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2013-02-19

... DEPARTMENT OF THE INTERIOR National Park Service [NPS-WASO-NAGPRA-12080;2200-1100-665] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington...

Thomas Young's contributions to geometrical optics.

Science.gov (United States)

Atchison, David A; Charman, W Neil

2011-07-01

In addition to his work on physical optics, Thomas Young (1773-1829) made several contributions to geometrical optics, most of which received little recognition in his time or since. We describe and assess some of these contributions: Young's construction (the basis for much of his geometric work), paraxial refraction equations, oblique astigmatism and field curvature, and gradient-index optics. © 2011 The Authors. Clinical and Experimental Optometry © 2011 Optometrists Association Australia.

Lewis' Educational and Research Collaborative Intership Program Grant Closeout Report

Science.gov (United States)

2003-01-01

The Lewis' Educational and Research Collaborative Internship Program (LERCIP) is a collaborative undertaking by the Office of Educational Programs at NASA Glenn Research Center at Lewis Field (formerly NASA Lewis Research Center) and the Ohio Aerospace Institute. This program provides 10-week internships and 10 or 12-week fellowships for undergraduate/graduate students and secondary school teachers. Approximately 130 interns are selected to participate in this program each year and begin arriving the second week in May. The internships provide students with introductory professional experiences to complement their academic programs. The interns are given assignments on research and development projects under the personal guidance of NASA professional staff members. Each intern is assigned a NASA mentor who facilitates a research assignment. In addition to the research assignment, the summer program includes a strong educational component that enhances the professional stature of the participants. The educational activities include a research symposium and a variety of workshops, lectures and short courses. An important aspect of the program is that it includes students with diverse social, cultural and economic backgrounds.

Thomas Hobbes: la resistencia política al Leviatán || Thomas Hobbes: Political Resistance To Leviathan

Directory of Open Access Journals (Sweden)

Diego Alejandro Fernández Peychaux

2013-12-01

Full Text Available RESUMEN En el presente artículo se presentan cuatro claves de lectura de la obra de Thomas Hobbes desde las que fundamentar una noción de resistencia. Este aporte busca, en otras palabras, crear las condiciones de posibilidad de un debate filosófico ofuscado por el mito recurrente sobre el supuesto monstruo de Malmesbury. Una vez hecho esto, se propone delinear las bases de un enfoque metodológico que parta de dicha noción de resistencia. De ese modo, se fundamentaría el primer paso hacia una apropiación ?o expropiación? contemporánea de la matriz hobbesiana de la relación obediencia-seguridad   ABSTRACT This article presents four key of readings about Thomas Hobbes's work, from which it supports a particular notion of resistance. In others words, this contribution searches to create the conditions of posibility for a philosophical debate obfuscated by the recurrent myth about the monster of Malmesbury. Once done that, I offer setting the bases of a metodological aproach which stars from this notion of resistance. Thus, I would back the first step towards a contemporary appropriation ?or expropriation? of the obedience-security relationship within the Hobbesian matrix.  

Thomas Hobbes: la resistencia política al Leviatán || Thomas Hobbes: Political Resistance To Leviathan

Directory of Open Access Journals (Sweden)

Diego Alejandro Fernández Peychaux

2013-12-01

Full Text Available RESUMEN En el presente artículo se presentan cuatro claves de lectura de la obra de Thomas Hobbes desde las que fundamentar una noción de resistencia. Este aporte busca, en otras palabras, crear las condiciones de posibilidad de un debate filosófico ofuscado por el mito recurrente sobre el supuesto monstruo de Malmesbury. Una vez hecho esto, se propone delinear las bases de un enfoque metodológico que parta de dicha noción de resistencia. De ese modo, se fundamentaría el primer paso hacia una apropiación ?o expropiación? contemporánea de la matriz hobbesiana de la relación obediencia-seguridad   ABSTRACT This article presents four key of readings about Thomas Hobbes's work, from which it supports a particular notion of resistance. In others words, this contribution searches to create the conditions of posibility for a philosophical debate obfuscated by the recurrent myth about the monster of Malmesbury. Once done that, I offer setting the bases of a metodological aproach which stars from this notion of resistance. Thus, I would back the first step towards a contemporary appropriation ?or expropriation? of the obedience-security relationship within the Hobbesian matrix.

Is It Lewy Body Dementia or Something Else?

Science.gov (United States)

... Options Join the fight against LBD! Donate Is It LBD or Something Else? Early and accurate diagnosis ... dementia with Lewy bodies’ (DLB). Symptoms that differentiate it from Alzheimer’s include unpredictable levels of cognitive ability, ...

Thomas Mofolo: the man, the writer and his contexts

African Journals Online (AJOL)

higher studies through the Protestant PEMS Mission, Thomas grabbed this ... main centres of power in the greater Caledon River valley after 1828, and many ..... Other Christians, such as Anna 'Mantsopa Makhetha, continued faithfully to carry.

78 FR 45958 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2013-07-30

... DEPARTMENT OF THE INTERIOR National Park Service [NPS-WASO-NAGPRA-13406; PPWOCRADN0-PCU00RP14.R50000] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke...

78 FR 59963 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2013-09-30

... DEPARTMENT OF THE INTERIOR National Park Service [NPS-WASO-NAGPRA-13770; PPWOCRADN0-PCU00RP14.R50000] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of..., Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington State Museum, University of...

78 FR 44595 - Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of...

Science.gov (United States)

2013-07-24

... DEPARTMENT OF THE INTERIOR National Park Service [NPS-WASO-NAGPRA-13407; PPWOCRADN0-PCU00RP14.R50000] Notice of Inventory Completion: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke...

A relativistic extended Fermi-Thomas-like equation for a self-gravitating system of fermions

International Nuclear Information System (INIS)

Merloni, A.; Ruffini, R.; Torroni, V.

1998-01-01

The authors extend previous results of a Fermi-Thomas model, describing self-gravitating fermions in their ground state, to a relativistic gravitational theory in Minkowski space. In such a theory the source term of the gravitational potential depends both on the pressure and the density of the fluid. It is shown that, in correspondence of this relativistic treatment, still a Fermi-Thomas-like equation can be derived for the self-gravitating system, though the non-linearities are much more complex. No Fermi-Thomas-like equation can be obtained in the General Relativistic treatment. The canonical results for neutron stars and white dwarfs are recovered and also some erroneous statements in the scientific literature are corrected

Kriegs- und Generationszeugen: Adrienne Thomas und Vera Brittain // Generation and War Witnesses: Adrienne Thomas and Vera Brittain

OpenAIRE

Zitzlsperger, Ulrike

2016-01-01

Im Vordergrund stehen in diesem Beitrag Autorinnen, die sich in den dreißiger Jahren kritisch mit dem Ersten Weltkrieg und seinen Folgen auseinandersetzten. Am Beispiel von Adrienne Thomas ("Die Katrin wird Soldat") und Vera Brittain ("Testament of Youth") soll untersucht werden, wie die erklärte Zugehörigkeit von Frauen zur 'Lost Generation' mit der aktiven Kriegsteilnahme als Krankenschwester und einem differenzierten Patriotismusverständnis verbunden wurde. Auffallend sind dabei nicht nur ...

Physical data from CTD casts in the North Pacific Ocean from the THOMAS G. THOMPSON and the THOMAS WASHINGTON in support of the Marathon 2 Project from 05 May 1985 to 07 September 1987 (NODC Accession 9400131)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Temperature and salinity profiles were collected from CTD casts in the North Pacific Ocean from the THOMAS G. THOMPSON and the THOMAS WASHINGTON. Data were collected...

Daniel Day-Lewis - veri peab voolama / Kristiina Davidjants

Index Scriptorium Estoniae

Davidjants, Kristiina, 1974-

2008-01-01

Iiri-juudi näitleja Daniel Day-Lewis, kes võitis oma rolliga P.T. Andersoni filmis "Veri hakkab voolama" parima meespeaosatäitja Oscari. Tema põhjalikust tööst rollidega läbi tema filmiloomingu

Thomas Graham: I. Contributions to thermodynamics, chemistry, and the occlusion of gases

OpenAIRE

Wisniak, Jaime

2013-01-01

Thomas Graham (1805-1869) is known as the founder of colloidal chemistry and for his fundamental research on the nature of phosphoric acid and phosphates, diffusion of gases, liquids, and solutions, adsorption of gases by metals, dialysis, osmosis, mass transfer through membranes, and the constitution of matter. A Thomas Graham (1805-1869) se le conoce como el fundador de la química coloidal y por sus investigaciones fundamentales en las áreas de la naturaleza del ácido fosfórico y los fos...

Thomas Linacre at the University of Padua.

Science.gov (United States)

Porzionato, Andrea; Macchi, Veronica; De Caro, Raffaele

2010-11-01

The Bo (meaning 'ox' in the Venetian dialect) is the historic seat of the University of Padua, founded in 1222. A full-length portrait of Thomas Linacre stands in its prestigious Sala dei Quaranta (Hall of the Forty), so called because of the portraits of forty great foreign scholars of the University, painted by Giacomo dal Forno in 1942. Thomas Linacre came to Italy in 1485, following an embassy by Henry VII to the Vatican. Linacre visited Bologna, Florence, Rome, Venice, Vicenza and Padua, where he took his degree in medicine in 1496 with great distinction. During his stay in Italy he met illustrious humanists and physicians, including Poliziano, Hermolaus Barbarus and Aldus Manutius Romanus, and Nicolaus Leonicenus who further stimulated him to the translation of classic works by Hippocrates and Galen. In 1518 Linacre played a pivotal role in the foundation of the Royal College of Physicians in London which, as first President, he organized on the basis of Italian models. With his portrait, the University of Padua celebrates the life and work of an astonishing figure linking the Italian and English medical cultures.

Frustrated Lewis pairs-assisted reduction of carbonyl compounds

Czech Academy of Sciences Publication Activity Database

Marek, Aleš; Pedersen, M. H. F.

2015-01-01

Roč. 71, č. 6 (2015), s. 917-921 ISSN 0040-4020 Institutional support: RVO:61388963 Keywords : frustrated Lewis pairs * hydrogen activation * benzyl alcohol * tritium labeling * labeled compounds Subject RIV: CC - Organic Chemistry Impact factor: 2.645, year: 2015

First record of Histiotus laephotis Thomas (Chiroptera, Vespertilionidae from Brazil Primeiro registro de Histiotus laephotis Thomas (Chiroptera, Vespertilionidae no Brasil

Directory of Open Access Journals (Sweden)

João M. D. Miranda

2007-12-01

Full Text Available The first record of Histiotus laephotis Thomas, 1916 from Brazil is reported here. An adult male was caught with a mist net in a barn located within an Araucaria pine forest in the municipality of Passos Maia, State of Santa Catarina, Southern Brazil (26º46'48"S and 52º03'34"W. This record extends the distribution of this species in South America. Morphological and taxonomic notes of this species are described as well.O primeiro registro de Histiotus laephotis Thomas, 1916 o Brasil é aqui reportado. Um macho adulto foi coletado com rede de neblina (em abrigo artificial nos domínios da Floresta com Araucária, no Município de Passos Maia, Estado de Santa Catarina, Sul do Brasil (26º46'48"S e 52º03'34"W. Este registro amplia a distribuição da própria espécie na América do Sul. Aspectos morfológicos e taxonômicos desta espécie são também descritos.

The Sovereign as Educator: Thomas Hobbes's National Curriculum.

Science.gov (United States)

Parry, Geraint

1998-01-01

Focuses on Thomas Hobbes, an English political philosopher who argued that the solution to civil disorders lay in a sovereign authority backed with force. Argues that education should be seen at the center of Hobbes's project of rescuing society from the disorders threatening civilization throughout 17th-century Europe. (CMK)

Potential motion for Thomas-Fermi non-topological solitons

International Nuclear Information System (INIS)

Bahcall, S.

1992-04-01

In the Thomas-Fermi approximation to theories of coupled fermions and scalars, the equations for spherically-symmetric non-topological solitons have the form of potential motion. This gives a straightforward method for proving the existence of non-topological solitons in a given theory and for finding the constant-density, saturating solutions

Mon Amour, de Thomas Ferrand

OpenAIRE

Châtelet, Caroline

2018-01-01

Dans l’un de ses précédents spectacles, Extase de Sainte Machine, Thomas Ferrand mettait en scène deux comédiens dans un espace nu. Debout avec à leurs pieds un pack de bières, ceux-ci ne bougeaient pas, ne parlaient pas, seule l’intensité lumineuse et la musique amenant le mouvement. Proposition radicale par son atmosphère dérivant du contemplatif à l’hypnotisme, Extase de Sainte-Machine frôlait, aussi, une forme d’hermétisme. Comme si à vouloir travailler sur des états statiques, sur le mot...

Specific acid catalysis and Lewis acid catalysis of Diels–Alder reactions in aqueous media

NARCIS (Netherlands)

Mubofu, Egid B.; Engberts, Jan B.F.N.

2004-01-01

A comparative study of specific acid catalysis and Lewis acid catalysis of Diels–Alder reactions between dienophiles (1, 4 and 6) and cyclopentadiene (2) in water and mixed aqueous media is reported. The reactions were performed in water with copper(II) nitrate as the Lewis acid catalyst whereas

Specific acid catalysis and Lewis acid catalysis of Diels-Alder reactions in aqueous media

NARCIS (Netherlands)

Mubofu, E.B.; Engberts, J.B.F.N.

A comparative study of specific acid catalysis and Lewis acid catalysis of Diells-Alder reactions between dienophiles (1, 4 and 6) and cyclopentadiene (2) in water and mixed aqueous media is reported. The reactions were performed in water with copper(II) nitrate as the Lewis acid catalyst whereas

Contributions to the knowledge of Banasa Stål (Hemiptera, Heteroptera, Pentatomidae: Banasa chaca Thomas

Directory of Open Access Journals (Sweden)

Thereza de Almeida Garbelotto

2011-09-01

Full Text Available Contributions to the knowledge of Banasa Stål (Hemiptera, Heteroptera, Pentatomidae: Banasa chaca Thomas. The male of Banasa chaca Thomas is described with emphasis on external and internal genitalia and the female internal genitalia is described. Banasa chaca is newly recorded from Buenos Aires Province (Argentina.

Carbonyl Activation by Borane Lewis Acid Complexation: Transition States of H2 Splitting at the Activated Carbonyl Carbon Atom in a Lewis Basic Solvent and the Proton-Transfer Dynamics of the Boroalkoxide Intermediate.

Science.gov (United States)

Heshmat, Mojgan; Privalov, Timofei

2017-07-06

By using transition-state (TS) calculations, we examined how Lewis acid (LA) complexation activates carbonyl compounds in the context of hydrogenation of carbonyl compounds by H 2 in Lewis basic (ethereal) solvents containing borane LAs of the type (C 6 F 5 ) 3 B. According to our calculations, LA complexation does not activate a ketone sufficiently enough for the direct addition of H 2 to the O=C unsaturated bond; but, calculations indicate a possibly facile heterolytic cleavage of H 2 at the activated and thus sufficiently Lewis acidic carbonyl carbon atom with the assistance of the Lewis basic solvent (i.e., 1,4-dioxane or THF). For the solvent-assisted H 2 splitting at the carbonyl carbon atom of (C 6 F 5 ) 3 B adducts with different ketones, a number of TSs are computed and the obtained results are related to insights from experiment. By using the Born-Oppenheimer molecular dynamics with the DFT for electronic structure calculations, the evolution of the (C 6 F 5 ) 3 B-alkoxide ionic intermediate and the proton transfer to the alkoxide oxygen atom were investigated. The results indicate a plausible hydrogenation mechanism with a LA, that is, (C 6 F 5 ) 3 B, as a catalyst, namely, 1) the step of H 2 cleavage that involves a Lewis basic solvent molecule plus the carbonyl carbon atom of thermodynamically stable and experimentally identifiable (C 6 F 5 ) 3 B-ketone adducts in which (C 6 F 5 ) 3 B is the "Lewis acid promoter", 2) the transfer of the solvent-bound proton to the oxygen atom of the (C 6 F 5 ) 3 B-alkoxide intermediate giving the (C 6 F 5 ) 3 B-alcohol adduct, and 3) the S N 2-style displacement of the alcohol by a ketone or a Lewis basic solvent molecule. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

NASA Lewis Research Center's materials and structures division

International Nuclear Information System (INIS)

Weymueller, C.R.

1976-01-01

Research activities at the NASA Lewis Research Center on materials and structures are discussed. Programs are noted on powder metallurgy superalloys, eutectic alloys, dispersion strengthened alloys and composite materials. Discussions are included on materials applications, coatings, fracture mechanics, and fatigue

Information entropy and Thomas-Fermi screening functions

International Nuclear Information System (INIS)

Donnamaria, M.C.; Meson, A.M.; Proto, A.N.

1989-11-01

In this work we apply the information entropy concept to analyze different trial electron densities in momentum and coordinate spaces, into the Thomas-Fermi density functional formalism. Furthermore, we try to assess how well-known physical properties of neutral atoms are reproduced and hence evaluate the quality of the screening functions in the light of their predictive capacity. (author). 32 refs, 4 figs, 3 tabs

Towards silence: Thomas Mofolo, small literatures and poor translation

African Journals Online (AJOL)

Despite having written three novels in the first decade of the 20th century, Thomas Mofolo has been largely ignored by historians .... poems dealing directly with the stars, the moon, and the Milky Way. In other ..... Mzilikazi is leading the flight:.

Thomas-Fermi treatment of nuclear masses, deformations and density distributions

International Nuclear Information System (INIS)

Myers, W.D.; Swiatecki, W.J.

1994-08-01

A recently completed Thomas-Fermi model of nuclei is described. Six adjustable parameters of the effective nucleon-nucleon interaction were fitted to the shell-corrected binding energies of 1654 nuclei and to the diffuseness of the nuclear surface. The model is then successful in reproducing nuclear sizes, and only small deviations are found between calculated and measured fission barriers of 36 nuclei. The model is applied to the prediction of fission barriers of light elements, to drip-line nuclei like 82 Sn and 170 Sn, to the properties of nuclear and neutron matter and to nuclear bubble configurations with Z 2 /A ∼ 100. The relation of a Thomas-Fermi theory to the Droplet and Liquid Drop models is illustrated

Thomas Mann e a cena intelectual no Brasil: encontros e desencontros

Directory of Open Access Journals (Sweden)

Sibele Paulino

2009-12-01

Full Text Available A origem brasileira de Thomas Mann, por parte de sua mãe, Julia da Silva Bruhns, deu ocasião, na maturidade do escritor, a seu contato com intelectuais brasileiros ou estrangeiros ligados à cena cultural do Brasil. No primeiro grupo, tem-se Gilberto Freyre, Sérgio Buarque de Holanda e Erico Verissimo. Residentes no Brasil, Karl Lustig-Prean, que posteriormente retornará à Europa, e o tradutor Herbert Caro, que se radica em definitivo no Brasil. Também o contato direto ou indireto com pensadores e escritores como Karl Loewenstein, Heinrich Eduard Jacob, Marte Brill e Stefan Zweig colaboraram para a aproximação de Thomas Mann ao universo brasileiro. Estes e outros pontos de contato são descritos no presente artigo, que pretende difundir dados e documentos há muito inacessíveis ou inéditos, no sentido de contribuir com abordagens atualizadas da obra de Thomas Mann e oferecer à pesquisa especializada a indicação de dados biográficos e documentais relacionados ao escritor, no que concerne à sua relação com o Brasil.

76 FR 58031 - Notice of Intent To Repatriate Cultural Items: Thomas Burke Memorial Washington State Museum...

Science.gov (United States)

2011-09-19

... DEPARTMENT OF THE INTERIOR National Park Service [2253-665] Notice of Intent To Repatriate Cultural Items: Thomas Burke Memorial Washington State Museum, University of Washington, Seattle, WA AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The Thomas Burke Memorial Washington State Museum...

Developing an approach for teaching and learning about Lewis structures

Science.gov (United States)

Kaufmann, Ilana; Hamza, Karim M.; Rundgren, Carl-Johan; Eriksson, Lars

2017-08-01

This study explores first-year university students' reasoning as they learn to draw Lewis structures. We also present a theoretical account of the formal procedure commonly taught for drawing these structures. Students' discussions during problem-solving activities were video recorded and detailed analyses of the discussions were made through the use of practical epistemology analysis (PEA). Our results show that the formal procedure was central for drawing Lewis structures, but its use varied depending on situational aspects. Commonly, the use of individual steps of the formal procedure was contingent on experiences of chemical structures, and other information such as the characteristics of the problem given. The analysis revealed a number of patterns in how students constructed, checked and modified the structure in relation to the formal procedure and the situational aspects. We suggest that explicitly teaching the formal procedure as a process of constructing, checking and modifying might be helpful for students learning to draw Lewis structures. By doing so, the students may learn to check the accuracy of the generated structure not only in relation to the octet rule and formal charge, but also to other experiences that are not explicitly included in the formal procedure.

Reduced frequency of blood group Lewis a-b- in female Type 1 diabetes patients

DEFF Research Database (Denmark)

Kharagjitsingh, A.V.; Prinsen, K.; Lemkes, H.H.

2008-01-01

AIMS: To examine a disputed association between the Lewis(a(-)b(-)) phenotype and Type 1 diabetes (T1D). METHODS: Lewis red blood cell phenotyping was performed for 97 T1D White patients and 100 control subjects using monoclonal antibodies. Two historical cohorts were also included as a control...

Ethical Implications of Thomas Reid's Philosophy of Rhetoric.

Science.gov (United States)

Skopec, Eric Wm.

Eighteenth century Scottish philosopher Thomas Reid's emphasis on first principles of knowledge is fundamental to his ethics of rhetoric. Reid found the reduction of mental activities to material phenomena by Hobbes and others to be particularly odious and destructive of common sense. Turning to the analysis of human nature, he developed a radical…

Anatomy of an organizational change effort at the Lewis Research Center

Science.gov (United States)

Hawker, James R.; Dali, Richard S.

1988-01-01

By 1979, after a long decline following the end of the Apollo program, the Lewis Research Center found its very existence endangered because it was not doing the kind of research that could attract funding at the time. New management under Andrew J. Stofan applied a program of strategic planning, participative management, and consensus decision making. A corporate-cultural change was effected which enabled Lewis to commit itself to four fundable research and development projects. Morale-building and training programs which were essential to this change are described.

Thomas Carlyle and the Characteristics of Nineteenth-Century English Literature

DEFF Research Database (Denmark)

Schatz-Jakobsen, Claus

2001-01-01

Artiklen diskuterer den skotske forfatter Thomas Carlyles plads i den engelske litteraturs historie og argumenterer for at hans skrift, "Characteristics" (1831), selv dramatiserer og dekonstruerer litteraturhistoriske grænsedragninger....

Case report of Lewy body disease mimicking Creutzfeldt-Jakob disease in a 44-year-old man.

Science.gov (United States)

Saint-Aubert, Laure; Pariente, Jérémie; Dumas, Herve; Payoux, Pierre; Brandel, Jean-Philippe; Puel, Michèle; Vital, Anne; Guedj, Eric; Lesage, Suzanne; Peoc'h, Katell; Brefel Courbon, Christine; Ory Magne, Fabienne

2016-07-30

Few patients are reported with dementia with Lewy bodies before fifty years-old, which may partly reflect the difficulty of accurate diagnosis in young population. We report the case of a 44-year-old male with pathologically confirmed sporadic dementia with Lewy bodies, who did not fulfil the revised clinical criteria for this disease. We document this atypical case with clinical and cognitive evaluation, imaging, biochemistry, genetics and pathology investigations. Creutzfeldt-Jakob disease was first suspected in this patient with no previous medical history, who developed acute and rapid cognitive impairment, L-dopa-non-responsive parkinsonism, and delusion. Positive 14-3-3 protein was initially detected in cerebrospinal fluid and until the late stages of the disease. Severe atrophy with no diffusion hypersignal was found on structural MRI as well as an extensive hypometabolism on (18)F-FDG-PET, in comparison to age-matched healthy volunteers. Genetic investigation found no alpha-synuclein gene mutation. The patient died within 5 years, and post-mortem examination found numerous Lewy bodies and Lewy neurites consistent with pure Lewy body disease. This comprehensively described case illustrates that dementia with Lewy bodies can occur in young patients with atypical clinical presentation. Biochemistry and neuroimaging investigations can sometimes be insufficient to allow accurate diagnostic. More specific markers to support such diagnosis are needed.

Playing around in Lewis Carroll's "Alice" Books

Science.gov (United States)

Susina, Jan

2010-01-01

Mathematician Charles Dodgson's love of play and his need for rules came together in his use of popular games as part of the structure of the two famous children's books, "Alice in Wonderland" and "Through the Looking-Glass," he wrote under the pseudonym Lewis Carroll. The author of this article looks at the interplay between…

Efficient Lewis Acid Ionic Liquid-Catalyzed Synthesis of the Key Intermediate of Coenzyme Q10 under Microwave Irradiation

Directory of Open Access Journals (Sweden)

Thomas Efferth

2010-12-01

Full Text Available An efficient synthesis of a valuable intermediate of coenzyme Q10 by microwave-assisted Lewis acidic ionic liquid (IL-catalyzed Friedel-Crafts alkylation is reported. The acidity of six [Etpy]BF4-based ionic liquids was characterized by means of the FT-IR technique using acetonitrile as a molecular probe. The catalytic activities of these ionic liquids were correlated with their Lewis acidity. With increasing Lewis acid strength of the ionic liquids, their catalytic activity in the Friedel-Crafts reaction increased, except for [Etpy]BF4-AlCl3. The effects of the reaction system, the molar fraction of Lewis acid in the Lewis acid ILs and heating techniques were also investigated. Among the six Lewis acid ionic liquids tested [Etpy]BF4-ZnCl2 showed the best catalytic activity, with a yield of 89% after a very short reaction time (150 seconds. This procedure has the advantages of higher efficiency, better reusability of ILs, energy conservation and eco-friendliness. The method has practical value for preparation of CoQ10 on an industrial scale.

Visual Hallucinations in PD and Lewy Body Dementias: Old and New Hypotheses

Directory of Open Access Journals (Sweden)

M. Onofrj

2013-01-01

Full Text Available Visual Hallucinations (VH are a common non-motor symptom of Parkinson’s Disease (PD and the Lewy body dementias (LBD of Parkinson's disease with dementia (PDD and Dementia with Lewy Bodies (DLB. The origin of VH in PD and LBD is debated: earlier studies considered a number of different possible mechanisms underlying VH including visual disorders, Rapid Eye Movement (REM Sleep Intrusions, dysfunctions of top down or bottom up visual pathways, and neurotransmitter imbalance.

Thomas B. Greenfield: A Challenging Perspective of Organizations

Science.gov (United States)

Bailey, Scott

2010-01-01

Organizations are not real; people are. Any science or theory of organizations must consider how the organization impinges, in a very real and tangible way, on the lives of its members. This article traces the development of one such theoretical branch of organizational science through the pioneering work of Thomas B. Greenfield. The author uses…

Lewis x is highly expressed in normal tissues: a comparative immunohistochemical study and literature revision.

Science.gov (United States)

Croce, María V; Isla-Larrain, Marina; Rabassa, Martín E; Demichelis, Sandra; Colussi, Andrea G; Crespo, Marina; Lacunza, Ezequiel; Segal-Eiras, Amada

2007-01-01

An immunohistochemical analysis was employed to determine the expression of carbohydrate antigens associated to mucins in normal epithelia. Tissue samples were obtained as biopsies from normal breast (18), colon (35) and oral cavity mucosa (8). The following carbohydrate epitopes were studied: sialyl-Lewis x, Lewis x, Lewis y, Tn hapten, sialyl-Tn and Thomsen-Friedenreich antigen. Mucins were also studied employing antibodies against MUC1, MUC2, MUC4, MUC5AC, MUC6 and also normal colonic glycolipid. Statistical analysis was performed and Kendall correlations were obtained. Lewis x showed an apical pattern mainly at plasma membrane, although cytoplasmic staining was also found in most samples. TF, Tn and sTn haptens were detected in few specimens, while sLewis x was found in oral mucosa and breast tissue. Also, normal breast expressed MUC1 at a high percentage, whereas MUC4 was observed in a small number of samples. Colon specimens mainly expressed MUC2 and MUC1, while most oral mucosa samples expressed MUC4 and MUC1. A positive correlation between MUC1VNTR and TF epitope (r=0.396) was found in breast samples, while in colon specimens MUC2 and colonic glycolipid versus Lewis x were statistically significantly correlated (r=0.28 and r=0.29, respectively). As a conclusion, a defined carbohydrate epitope expression is not exclusive of normal tissue or a determined localization, and it is possible to assume that different glycoproteins and glycolipids may be carriers of carbohydrate antigens depending on the tissue localization considered.

O Estado cristão em Thomas Hobbes

Directory of Open Access Journals (Sweden)

Daniel Artur Emidio Branco

2016-12-01

Full Text Available O presente artigo tem como finalidade a investigação do pensamento do filósofo inglês Thomas Hobbes (1588-1679, mais precisamente a relação entre Igreja e Estado, valendo-se de suas obras, em especial Leviatã (1651. Com o título O Estado Eclesiástico em Thomas Hobbes, o artigo busca mostrar como as conclusões de Hobbes acerca do papel da Igreja no Estado são relevantes para o século XXI. A concepção de Evangelho de Cristo como um reino de outro mundo, a natureza privada da fé, o pontificado do soberano como aquele que se posiciona está entre Deus e os homens, a união entre Lei Mosaica e Lei Natural e a união entre Igreja e Estado são os delimitadores do grande tema, que busca levar o leitor contemporâneo ao conhecimento das conclusões de Hobbes e, assim, considerar a aplicação das mesmas a sua geração.

The convenient myth of Thomas Szasz.

Science.gov (United States)

Buchanan-Barker, P; Barker, P

2009-02-01

Thomas Szasz's original critique of the concept of 'mental illness' is almost 50 years old. Over that half century Szasz has maintained a consistent campaign against the 'Therapeutic State', challenging the paternalism of coercive psychiatry and defending liberty and autonomy. Despite his widespread celebrity Szasz continues to be misread and misrepresented. In this paper we review some of Szasz's key ideas, in the light of Clarke's recent critique, setting this within the context of 'mental health nursing' and the problems in living affecting persons worldwide.

St. Thomas and the Divine Origin of Law: Some Notes

Directory of Open Access Journals (Sweden)

Lawrence Dewan, O.P.

2008-12-01

Full Text Available This article presents a series of notes on the concept of Law and itsrelationship to God in Classical Antiquity, specifically taking into account the viewpoints of Aristotle and Saint Thomas Aquinas.

"Ma vihkan suuremat osa inimesi!" / Kristiina Davidjants

Index Scriptorium Estoniae

Davidjants, Kristiina, 1974-

2008-01-01

Paul Thomas Andersoni Upton Sinclairi "Õli" järgi lavastatud "Veri hakkab voolama" ("There Will Be Blood"), peaosas Daniel Day-Lewis : Ameerika Ühendriigid 2007. Lisatud väljavõte Berlinale pressikonverentsilt P.T. Andersoni esinemisega

The modified Thomas test is not a valid measure of hip extension unless pelvic tilt is controlled

Directory of Open Access Journals (Sweden)

Andrew D. Vigotsky

2016-08-01

Full Text Available The modified Thomas test was developed to assess the presence of hip flexion contracture and to measure hip extensibility. Despite its widespread use, to the authors’ knowledge, its criterion reference validity has not yet been investigated. The purpose of this study was to assess the criterion reference validity of the modified Thomas test for measuring peak hip extension angle and hip extension deficits, as defined by the hip not being able to extend to 0º, or neutral. Twenty-nine healthy college students (age = 22.00 ± 3.80 years; height = 1.71 ± 0.09 m; body mass = 70.00 ± 15.60 kg were recruited for this study. Bland–Altman plots revealed poor validity for the modified Thomas test’s ability to measure hip extension, which could not be explained by differences in hip flexion ability alone. The modified Thomas test displayed a sensitivity of 31.82% (95% CI [13.86–54.87] and a specificity of 57.14% (95% CI [18.41–90.10] for testing hip extension deficits. It appears, however, that by controlling pelvic tilt, much of this variance can be accounted for (r = 0.98. When pelvic tilt is not controlled, the modified Thomas test displays poor criterion reference validity and, as per previous studies, poor reliability. However, when pelvic tilt is controlled, the modified Thomas test appears to be a valid test for evaluating peak hip extension angle.

Peakonsul Jaanus Kirikmäe andis teenetemärgi praost Thomas Vagale / Airi Vaga ; foto: Harold Karu

Index Scriptorium Estoniae

Vaga, Airi, 1940-

2008-01-01

President Toomas Hendrik Ilves annetas iseseisvuspäeva puhul USA I praostkonna praostile Thomas Vagale Valgetähe IV klassi teenetemärgi. Teenetemärgi andis Thomas Vagale üle Eesti Vabariigi peakonsul Jaanus Kirikmäe

Reflective Teaching and Practice: Interview with Thomas Farrell

Science.gov (United States)

Pang, Alvin

2017-01-01

Thomas Farrell is widely known for his views and publications on the topic of Reflective Practice, which is key to the professional development of teachers in 21st century classrooms. He is Professor of Applied Linguistics at Brock University, Canada. Farrell has been a language teacher and teacher educator since 1978 and has worked in Korea,…

LewiSpace: An Exploratory Study with a Machine Learning Model in an Educational Game

Science.gov (United States)

Ghali, Ramla; Ouellet, Sébastien; Frasson, Claude

2016-01-01

The use of educational games as a tool for providing learners with a playful and educational aspect is widespread. In this paper, we present an educational game that we developed to teach a chemistry lesson, namely drawing a Lewis diagram. Our game is a 3D environment known as LewiSpace and aims at balancing between playful and educational…

The Weyl non-Abelian gauge field and the Thomas precession

International Nuclear Information System (INIS)

Barbashov, B.M.; Pestov, A.B.

1998-01-01

The connection between the Fermi-Walker transport and the Weyl non-Abelian gauge field is established. A theoretical possibility of detecting the Weyl gauge field caused by the Thomas precession of a gyroscope is discussed

Synthesis, characterization, and application of two Al(OR(F))3 Lewis superacids.

Science.gov (United States)

Kraft, Anne; Trapp, Nils; Himmel, Daniel; Böhrer, Hannes; Schlüter, Peter; Scherer, Harald; Krossing, Ingo

2012-07-23

We report herein the synthesis and full characterization of the donor-free Lewis superacids Al(OR(F))(3) with OR(F) = OC(CF(3))(3) (1) and OC(C(5)F(10))C(6)F(5) (2), the stabilization of 1 as adducts with the very weak Lewis bases PhF, 1,2-F(2)C(6)H(4), and SO(2), as well as the internal C-F activation pathway of 1 leading to Al(2)(F)(OR(F))(5) (4) and trimeric [FAl(OR(F))(2)](3) (5, OR(F) = OC(CF(3))(3)). Insights have been gained from NMR studies, single-crystal structure determinations, and DFT calculations. The usefulness of these Lewis acids for halide abstractions has been demonstrated by reactions with trityl chloride (NMR; crystal structures). The trityl salts allow the introduction of new, heteroleptic weakly coordinating [Cl-Al(OR(F))(3)](-) anions, for example, by hydride or alkyl abstraction reactions. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Reduced CSF CART in dementia with Lewy bodies

DEFF Research Database (Denmark)

Schultz, Kristofer; Wiehager, Sara; Nilsson, Karin

2009-01-01

Dementia with Lewy bodies (DLB) is the second most common form of neurodegenerative dementia after Alzheimer's disease (AD). The underlying neurobiological mechanism of DLB is not fully understood and no generally accepted biomarkers are yet available for the diagnosis of DLB. In a recent MRI study...

Frustrated Lewis pairs-assisted reduction of carbonyl compounds

DEFF Research Database (Denmark)

Marek, Ales; Pedersen, Martin Holst Friborg

2015-01-01

An alternative and robust method for the reduction of carbonyl groups by frustrated Lewis pairs (FLPs) is reported in this paper. With its very mild reaction conditions, good to excellent yields, absolute regioselectivity and the non-metallic character of the reagent, it provides an excellent too...

Thomas Young's research on fluid transients: 200 years on

NARCIS (Netherlands)

Tijsseling, A.S.; Anderson, A.; Hunt, S.

2008-01-01

Thomas Young published in 1808 his famous paper (1) in which he derived the pressure wave speed in an incompressible liquid contained in an elastic tube. Unfortunately, Young's analysis was obscure and the wave speed was not explicitly formulated, so his achievement passed unnoticed until it was

Thomas Young's research on fluid transients : 200 years on

NARCIS (Netherlands)

Tijsseling, A.S.; Anderson, A.

2008-01-01

Thomas Young published in 1808 his famous paper (1) in which he derived the pressure wave speed in an incompressible liquid contained in an elastic tube. Unfortunately, Young's analysis was obscure and the wave speed was not explicitly formulated, so his achievement passed unnoticed until it was

Compensatory shifts in visual perception are associated with hallucinations in Lewy body disorders.

Science.gov (United States)

Bowman, Alan Robert; Bruce, Vicki; Colbourn, Christopher J; Collerton, Daniel

2017-01-01

Visual hallucinations are a common, distressing, and disabling symptom of Lewy body and other diseases. Current models suggest that interactions in internal cognitive processes generate hallucinations. However, these neglect external factors. Pareidolic illusions are an experimental analogue of hallucinations. They are easily induced in Lewy body disease, have similar content to spontaneous hallucinations, and respond to cholinesterase inhibitors in the same way. We used a primed pareidolia task with hallucinating participants with Lewy body disorders (n = 16), non-hallucinating participants with Lewy body disorders (n = 19), and healthy controls (n = 20). Participants were presented with visual "noise" that sometimes contained degraded visual objects and were required to indicate what they saw. Some perceptions were cued in advance by a visual prime. Results showed that hallucinating participants were impaired in discerning visual signals from noise, with a relaxed criterion threshold for perception compared to both other groups. After the presentation of a visual prime, the criterion was comparable to the other groups. The results suggest that participants with hallucinations compensate for perceptual deficits by relaxing perceptual criteria, at a cost of seeing things that are not there, and that visual cues regularize perception. This latter finding may provide a mechanism for understanding the interaction between environments and hallucinations.

33 CFR 207.425 - Calumet River, Ill.; Thomas J. O'Brien Lock and Controlling Works and the use, administration and...

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Calumet River, Ill.; Thomas J. O... DEFENSE NAVIGATION REGULATIONS § 207.425 Calumet River, Ill.; Thomas J. O'Brien Lock and Controlling Works... paragraph (a)(1) of this section. (b) Lock—(1) Operation. The Thomas J. O'Brien Lock and Dam is part of the...

St. Thomas and the hilemorfic ontology

Directory of Open Access Journals (Sweden)

Lawrence Dewan, O.P.

2009-06-01

Full Text Available This article presents the relevancy of Aristotle’s hylemorphic ontology.Aristotle himself highlighted the importance and astonishing complexityof the problem of prime matter’s ontological status and he presenting thesolution in his doctrine of hylemorphism. As Saint Thomas Aquinasnoted, it is a crucial issue for philosophy because all four, hilemorfism,logic, physics and metaphysics, stand or fall depending on a correctunderstanding of the ontology of prime matter and of the kind of causalrelationship which exist between prime matter and substantial form ingenerable and corruptible substance.

Pilgrim Souvenir: Ampulla of Thomas Becket

OpenAIRE

Amy Jeffs

2017-01-01

This tin ampulla was probably purchased by a pilgrim near the shrine of St Thomas Becket in Canterbury. It is designed to contain holy water and be hung around the neck on a cord. Measuring 100 by 87 millimetres, it is in the form of a narrow, pointed vessel surrounded by an openwork penannular frame and would have been rapidly slush-cast, in one go, in a three-part mould. A date in the first half of the thirteenth century is probable based on the style of the military figures’ armour and the...

Localized Donaldson-Thomas theory of surfaces

DEFF Research Database (Denmark)

Gholampour, Amin; Sheshmani, Artan; Yau, Shing-Tung

2017-01-01

Let S be a projective simply connected complex surface and  be a line bundle on S. We study the moduli space of stable compactly supported 2-dimensional sheaves on the total spaces of . The moduli space admits a ℂ∗-action induced by scaling the fibers of . We identify certain components of the......  is the canonical bundle of S, the Vafa-Witten invariants defined recently by Tanaka-Thomas, can be extracted from these localized DT invariants. VW invariants are expected to have modular properties as predicted by S-duality....

On the behaviour of biradicaloid [P(μ-NTer)]2 towards Lewis acids and bases.

Science.gov (United States)

Hinz, Alexander; Schulz, Axel; Villinger, Alexander

2016-05-07

The well-known diphosphadiazane-1,3-diyl [P(μ-NTer)]2 (Ter = 2,6-bis(2,4,6-trimethyl-phenyl)-phenyl) was treated with Lewis bases such as N-heterocyclic carbenes and Lewis acids e.g. gold(i) chloride complexes. In the reaction with the Lewis base, fragmentation of the P2N2 framework was observed, yielding a salt of the type [(NHC)2P](+)[(TerN)2P](-) in a clean reaction. The reaction of [P(μ-NTer)]2 with gold(i) chloride afforded 1 : 1 and 1 : 2 complexes. The dinuclear complex [(ClAu)2P(μ-NTer)2P] displays a bridging P atom between both gold centers, as has been observed for P based zwitterions.

Lewis pair polymerization by classical and frustrated Lewis pairs: Acid, base and monomer scope and polymerization mechanism

KAUST Repository

Zhang, Yuetao

2012-01-01

Classical and frustrated Lewis pairs (LPs) of the strong Lewis acid (LA) Al(C 6F 5) 3 with several Lewis base (LB) classes have been found to exhibit exceptional activity in the Lewis pair polymerization (LPP) of conjugated polar alkenes such as methyl methacrylate (MMA) as well as renewable α-methylene-γ-butyrolactone (MBL) and γ-methyl- α-methylene-γ-butyrolactone (γ-MMBL), leading to high molecular weight polymers, often with narrow molecular weight distributions. This study has investigated a large number of LPs, consisting of 11 LAs as well as 10 achiral and 4 chiral LBs, for LPP of 12 monomers of several different types. Although some more common LAs can also be utilized for LPP, Al(C 6F 5) 3-based LPs are far more active and effective than other LA-based LPs. On the other hand, several classes of LBs, when paired with Al(C 6F 5) 3, can render highly active and effective LPP of MMA and γ-MMBL; such LBs include phosphines (e.g., P tBu 3), chiral chelating diphosphines, N-heterocyclic carbenes (NHCs), and phosphazene superbases (e.g., P 4- tBu). The P 4- tBu/Al(C 6F 5) 3 pair exhibits the highest activity of the LP series, with a remarkably high turn-over frequency of 9.6 × 10 4 h -1 (0.125 mol% catalyst, 100% MMA conversion in 30 s, M n = 2.12 × 10 5 g mol -1, PDI = 1.34). The polymers produced by LPs at RT are typically atactic (P γMMBL with ∼47% mr) or syndio-rich (PMMA with ∼70-75% rr), but highly syndiotactic PMMA with rr ∼91% can be produced by chiral or achiral LPs at -78 °C. Mechanistic studies have identified and structurally characterized zwitterionic phosphonium and imidazolium enolaluminates as the active species of the current LPP system, which are formed by the reaction of the monomer·Al(C 6F 5) 3 adduct with P tBu 3 and NHC bases, respectively. Kinetic studies have revealed that the MMA polymerization by the tBu 3P/ Al(C 6F 5) 3 pair is zero-order in monomer concentration after an initial induction period, and the polymerization

Semiclassical approach to Regge poles trajectories calculations for nonsingular potentials: Thomas-Fermi type

International Nuclear Information System (INIS)

Belov, S M; Avdonina, N B; Felfli, Z; Marletta, M; Msezane, A Z; Naboko, S N

2004-01-01

A simple semiclassical approach, based on the investigation of anti-Stokes line topology, is presented for calculating Regge poles for nonsingular (Thomas-Fermi type) potentials, namely potentials with singularities at the origin weaker than order -2. The anti-Stokes lines for Thomas-Fermi potentials have a more complicated structure than those of singular potentials and require careful application of complex analysis. The explicit solution of the Bohr-Sommerfeld quantization condition is used to obtain approximate Regge poles. We introduce and employ three hypotheses to obtain several terms of the Regge pole approximation

Questions and Answers for Ken Thomas' "Intra-Extra Vehicular Activity Russian and Gemini Spacesuits" Presentation

Science.gov (United States)

Thomas, Kenneth S.

2016-01-01

Kenneth Thomas will discuss the Intra-Extra Vehicular Activity Russian & Gemini spacesuits. While the United States and Russia adapted to existing launch- and reentry-type suits to allow the first human ventures into the vacuum of space, there were differences in execution and capabilities. Mr. Thomas will discuss the advantages and disadvantages of this approach compared to exclusively intravehicular or extra-vehicular suit systems.

The Thomas-Reiche-Kuhn sum rule and the toroid moments

International Nuclear Information System (INIS)

Dubovik, V.M.

1975-01-01

By example of the Thomas-Reiche-Kuhn sum rule a procedure is given for calculating the retardation effects in any E-transition strengths via the toroid moments. The investigation has been performed at the Laboratory of Theoretical Physics, JINR

Historical perspectives - The role of the NASA Lewis Research Center in the national space nuclear power programs

Science.gov (United States)

Bloomfield, H. S.; Sovie, R. J.

1991-01-01

The history of the NASA Lewis Research Center's role in space nuclear power programs is reviewed. Lewis has provided leadership in research, development, and the advancement of space power and propulsion systems. Lewis' pioneering efforts in nuclear reactor technology, shielding, high temperature materials, fluid dynamics, heat transfer, mechanical and direct energy conversion, high-energy propellants, electric propulsion and high performance rocket fuels and nozzles have led to significant technical and management roles in many natural space nuclear power and propulsion programs.

Historical perspectives: The role of the NASA Lewis Research Center in the national space nuclear power programs

Science.gov (United States)

Bloomfield, H. S.; Sovie, R. J.

1991-01-01

The history of the NASA Lewis Research Center's role in space nuclear power programs is reviewed. Lewis has provided leadership in research, development, and the advancement of space power and propulsion systems. Lewis' pioneering efforts in nuclear reactor technology, shielding, high temperature materials, fluid dynamics, heat transfer, mechanical and direct energy conversion, high-energy propellants, electric propulsion and high performance rocket fuels and nozzles have led to significant technical and management roles in many national space nuclear power and propulsion programs.

Visual cortex in dementia with Lewy bodies: magnetic resonance imaging study

Science.gov (United States)

Taylor, John-Paul; Firbank, Michael J.; He, Jiabao; Barnett, Nicola; Pearce, Sarah; Livingstone, Anthea; Vuong, Quoc; McKeith, Ian G.; O’Brien, John T.

2012-01-01

Background Visual hallucinations and visuoperceptual deficits are common in dementia with Lewy bodies, suggesting that cortical visual function may be abnormal. Aims To investigate: (1) cortical visual function using functional magnetic resonance imaging (fMRI); and (2) the nature and severity of perfusion deficits in visual areas using arterial spin labelling (ASL)-MRI. Method In total, 17 participants with dementia with Lewy bodies (DLB group) and 19 similarly aged controls were presented with simple visual stimuli (checkerboard, moving dots, and objects) during fMRI and subsequently underwent ASL-MRI (DLB group n = 15, control group n = 19). Results Functional activations were evident in visual areas in both the DLB and control groups in response to checkerboard and objects stimuli but reduced visual area V5/MT (middle temporal) activation occurred in the DLB group in response to motion stimuli. Posterior cortical perfusion deficits occurred in the DLB group, particularly in higher visual areas. Conclusions Higher visual areas, particularly occipito-parietal, appear abnormal in dementia with Lewy bodies, while there is a preservation of function in lower visual areas (V1 and V2/3). PMID:22500014

75 FR 58426 - Notice of Intent to Repatriate Cultural Items: Thomas Gilcrease Institute of American History and...

Science.gov (United States)

2010-09-24

...: Thomas Gilcrease Institute of American History and Art, Tulsa, OK AGENCY: National Park Service, Interior... Thomas Gilcrease Institute of American History and Art (Gilcrease Museum), Tulsa, OK, that meet the... the Gilcrease Museum for the preservation of North American history. The first bundle is made of...

The Concurrentism of Thomas Aquinas: Divine Causation and Human Freedom

Czech Academy of Sciences Publication Activity Database

Dvořák, Petr

2013-01-01

Roč. 41, č. 3 (2013), s. 617-634 ISSN 0048-3893 R&D Projects: GA ČR(CZ) GAP401/11/0371 Institutional support: RVO:67985955 Keywords : divine causation * free will * concurrentism * Thomas Aquinas Subject RIV: AA - Philosophy ; Religion

E.E.L.K. Peapiiskopi valimised / Thomas Vaga, Ivar Nippak

Index Scriptorium Estoniae

Vaga, Thomas, 1938-

2007-01-01

21. detsembril teatas häältelugemiskomisjon, et kaks enam hääli saanud kandidaati on Thomas Vaga ja Andres Taul. Samade kandidaatide vahel toimub korduv hääletus. Uued valimismaterjalid saadetakse välja 2007. aasta jaanuaris

Some notes on time dependent Thomas Fermi approximation

International Nuclear Information System (INIS)

Holzwarth, G.

1979-01-01

The successful use of effective density-dependent potentials in static Hartree-Fock calculations for nuclear ground-state properties has led to the question whether it is possible to obtain significant further simplification by approximating also the kinetic energy part of the ground state energy by a functional of the local density alone. The great advantage of such an approach is that its complexity is independent of particle number; the size of the system enters only through parameters, Z and N. The simple 'extended Thomas Fermi' functionals are based on the assumption of a spherically symmetric local Fermi surface throughout the nucleus and they represent the 'liquid drop' part of the static total energy. Given this static formalism which is solved directly for the local density without considering individual particles one might ask for a possible dynamical extension in the same sense as TDHF is a dynamical extension of the static HF approach. The aim of such a Time Dependent Thomas Fermi (TDTF) approximation would be to determine directly the time-dependent local single-particle density from given initial conditions and the single-particle current density without following each particle on its individual orbit

preparation of bicyclic lactones using lewis acids catalyzed ene

African Journals Online (AJOL)

Administrator

The synthesis of the cis-fused bicyclic lactones relies extensively on the Lewis acid ... having an allylic hydrogen (an"ene") and a compound containing an electron .... observed that the lithium enolate obtained from 3-methyl-2(5H)- furanone ...

Lewis antigen mediated adhesion of freshly removed human bladder tumors to E-selectin

DEFF Research Database (Denmark)

Skorsteensgaard, Karna; Vestergaard, Else Marie; Langkilde, Niels

1999-01-01

PURPOSE: Twenty fresh surgical specimens of human bladder tumors were tested for their ability to adhere to recombinant P and E-selectin. The adhesion was correlated to immunological detection of carbohydrate structures. MATERIALS AND METHODS: A static titertray assay with immobilized selectins.......003), whereas no correlation was found to secretor and Lewis genotypes. CONCLUSIONS: These data on clinical specimens indicate that Lewis antigen mediated E-selectin adhesion may play a role in the human bladder cancer disease....

A new estimate of the Khirzhnits corrections to the zero temperature Thomas-Fermi equation-of-state

International Nuclear Information System (INIS)

Szichman, H.; Krumbein, A.D.; Eliezer, S.

1984-09-01

A method is proposed for estimating the zero temperature limit of the Khirzhnits corrections to the Thomas-Fermi equation-of-state by extrapolation of the finite-temperature results. The cold curves so obtained for Ti, Fe, Cu and Ta are compared with experimental results as well as with those calculated using other variations of the Thomas-Fermi model

An Integrated Perspective of Humanism and Supernaturalism for Education: C. S. Lewis's Version of Education

Science.gov (United States)

Lee, Seung Chun

2013-01-01

This paper explores some theoretical reflections on the connection between C. S. Lewis's thoughts on the purpose and process of education and his understanding of supernatural human nature which has been relatively little explored. An introduction about Lewis's career as a college teacher blends into the background of this paper. It is followed by…

Who Needs Lewis Structures to Get VSEPR Geometries?

Science.gov (United States)

Lindmark, Alan F.

2010-01-01

Teaching the VSEPR (valence shell electron-pair repulsion) model can be a tedious process. Traditionally, Lewis structures are drawn and the number of "electron clouds" (groups) around the central atom are counted and related to the standard VSEPR table of possible geometries. A simpler method to deduce the VSEPR structure without first drawing…

Feynman versus Bakamjian-Thomas in light-front dynamics

International Nuclear Information System (INIS)

Araujo, W.R.B. de; Beyer, M.; Weber, H.J.; Frederico, T.

1999-01-01

We compare the Bakamjian-Thomas (BT) formulation of relativistic few-body systems with light-front field theories that maintain closer contact with Feynman diagrams. We find that Feynman diagrams distinguish Melosh rotations and other kinematical quantities belonging to various composite subsystem frames that correspond to different loop integrals. The BT formalism knows only the rest frame of the whole composite system, where everything is evaluated. (author)

Thomas Aquinas: On Law, Tyranny and Resistance | Swartz | Acta ...

African Journals Online (AJOL)

Thomas Aquinas's notion on law, tyranny and resistance served as a limitation on governmental powers. When those who bear the law command things which exceed the competence of such authority, the subject is free to obey or disobey. The function of the law culminates in two maxims: quantum ad vim coactivam legis ...

α-Synuclein pathology in the cranial and spinal nerves in Lewy body disease.

Science.gov (United States)

Nakamura, Keiko; Mori, Fumiaki; Tanji, Kunikazu; Miki, Yasuo; Toyoshima, Yasuko; Kakita, Akiyoshi; Takahashi, Hitoshi; Yamada, Masahito; Wakabayashi, Koichi

2016-06-01

Accumulation of phosphorylated α-synuclein in neurons and glial cells is a histological hallmark of Lewy body disease (LBD) and multiple system atrophy (MSA). Recently, filamentous aggregations of phosphorylated α-synuclein have been reported in the cytoplasm of Schwann cells, but not in axons, in the peripheral nervous system in MSA, mainly in the cranial and spinal nerve roots. Here we conducted an immunohistochemical investigation of the cranial and spinal nerves and dorsal root ganglia of patients with LBD. Lewy axons were found in the oculomotor, trigeminal and glossopharyngeal-vagus nerves, but not in the hypoglossal nerve. The glossopharyngeal-vagus nerves were most frequently affected, with involvement in all of 20 subjects. In the spinal nerve roots, Lewy axons were found in all of the cases examined. Lewy axons in the anterior nerves were more frequent and numerous in the thoracic and sacral segments than in the cervical and lumbar segments. On the other hand, axonal lesions in the posterior spinal nerve roots appeared to increase along a cervical-to-sacral gradient. Although Schwann cell cytoplasmic inclusions were found in the spinal nerves, they were only minimal. In the dorsal root ganglia, axonal lesions were seldom evident. These findings indicate that α-synuclein pathology in the peripheral nerves is axonal-predominant in LBD, whereas it is restricted to glial cells in MSA. © 2015 Japanese Society of Neuropathology.

Dust acoustic solitary and shock excitations in a Thomas-Fermi magnetoplasma

Energy Technology Data Exchange (ETDEWEB)

Rahim, Z.; Qamar, A. [Institute of Physics and Electronics, University of Peshawar, Peshawar 25000 (Pakistan); National Center for Physics (NCP) at QAU Campus, Shahdra Valley Road, Islamabad 44000 (Pakistan); Ali, S. [National Center for Physics (NCP) at QAU Campus, Shahdra Valley Road, Islamabad 44000 (Pakistan)

2014-07-15

The linear and nonlinear properties of dust-acoustic waves are investigated in a collisionless Thomas-Fermi magnetoplasma, whose constituents are electrons, ions, and negatively charged dust particles. At dust time scale, the electron and ion number densities follow the Thomas-Fermi distribution, whereas the dust component is described by the classical fluid equations. A linear dispersion relation is analyzed to show that the wave frequencies associated with the upper and lower modes are enhanced with the variation of dust concentration. The effect of the latter is seen more strongly on the upper mode as compared to the lower mode. For nonlinear analysis, we obtain magnetized Korteweg-de Vries (KdV) and Zakharov-Kuznetsov (ZK) equations involving the dust-acoustic solitary waves in the framework of reductive perturbation technique. Furthermore, the shock wave excitations are also studied by allowing dissipation effects in the model, leading to the Korteweg-de Vries-Burgers (KdVB) and ZKB equations. The analysis reveals that the dust-acoustic solitary and shock excitations in a Thomas-Fermi plasma are strongly influenced by the plasma parameters, e.g., dust concentration, dust temperature, obliqueness, magnetic field strength, and dust fluid viscosity. The present results should be important for understanding the solitary and shock excitations in the environments of white dwarfs or supernova, where dust particles can exist.

Dust acoustic solitary and shock excitations in a Thomas-Fermi magnetoplasma

International Nuclear Information System (INIS)

Rahim, Z.; Qamar, A.; Ali, S.

2014-01-01

The linear and nonlinear properties of dust-acoustic waves are investigated in a collisionless Thomas-Fermi magnetoplasma, whose constituents are electrons, ions, and negatively charged dust particles. At dust time scale, the electron and ion number densities follow the Thomas-Fermi distribution, whereas the dust component is described by the classical fluid equations. A linear dispersion relation is analyzed to show that the wave frequencies associated with the upper and lower modes are enhanced with the variation of dust concentration. The effect of the latter is seen more strongly on the upper mode as compared to the lower mode. For nonlinear analysis, we obtain magnetized Korteweg-de Vries (KdV) and Zakharov-Kuznetsov (ZK) equations involving the dust-acoustic solitary waves in the framework of reductive perturbation technique. Furthermore, the shock wave excitations are also studied by allowing dissipation effects in the model, leading to the Korteweg-de Vries-Burgers (KdVB) and ZKB equations. The analysis reveals that the dust-acoustic solitary and shock excitations in a Thomas-Fermi plasma are strongly influenced by the plasma parameters, e.g., dust concentration, dust temperature, obliqueness, magnetic field strength, and dust fluid viscosity. The present results should be important for understanding the solitary and shock excitations in the environments of white dwarfs or supernova, where dust particles can exist

Individual and contextual variation in Thomas langur male loud calls

NARCIS (Netherlands)

Wich, S.A.; Koski, S.; Vries, Han de; Schaik, Carel P. van

2003-01-01

Individual and contextual differences in male loud calls of wild Thomas langurs (Presbytis thomasi) were studied in northern Sumatra, Indonesia. Loud calls were given in the following contexts: morning calls, vocal responses to other groups, between-group encounter calls and alarmcalls. Loud

On the Symbolism of Thomas Mann

Directory of Open Access Journals (Sweden)

Vasily M. Tolmatchoff

2017-09-01

Full Text Available The essay discusses Thomas Mann’s symbolism and its parameters as well as Mann’s interpretation of the crisis of European spiritual values. Тhe author examines the role of Nietzsche in Mann’s heritage as well as interconnections between Mann and Wilde, Mann and Gide. Buddenbrooks is interpreted as a novel about the end of the German Renaissance; duality of the modern artist is shown on the example of “Tonio Kröger” while the paradoxes of his eroticism are analyzed on the example of “Der Tod in Venedig.”

Limitations of the Porter-Thomas distribution

Science.gov (United States)

Weidenmüller, Hans A.

2017-12-01

Data on the distribution of reduced partial neutron widths and on the distribution of total gamma decay widths disagree with the Porter-Thomas distribution (PTD) for reduced partial widths or with predictions of the statistical model. We recall why the disagreement is important: The PTD is a direct consequence of the orthogonal invariance of the Gaussian Orthogonal Ensemble (GOE) of random matrices. The disagreement is reviewed. Two possible causes for violation of orthogonal invariance of the GOE are discussed, and their consequences explored. The disagreement of the distribution of total gamma decay widths with theoretical predictions cannot be blamed on the statistical model.

Pilgrim Souvenir: Ampulla of Thomas Becket

Directory of Open Access Journals (Sweden)

Amy Jeffs

2017-06-01

Full Text Available This tin ampulla was probably purchased by a pilgrim near the shrine of St Thomas Becket in Canterbury. It is designed to contain holy water and be hung around the neck on a cord. Measuring 100 by 87 millimetres, it is in the form of a narrow, pointed vessel surrounded by an openwork penannular frame and would have been rapidly slush-cast, in one go, in a three-part mould. A date in the first half of the thirteenth century is probable based on the style of the military figures’ armour and the archaeological contexts of stylistically similar ampullae.

The Thomas-Fermi model: momentum expectation values

International Nuclear Information System (INIS)

Dmitrieva, I.K.; Plindov, G.I.

1983-01-01

Within the Thomas-Fermi model including the exchange interaction and contributions of strongly bound electrons, analytical expressions are obtained for all momentum expectation values and for some of the expectation values of powers of the electron density for an atom with an arbitrary degree of ionization. It is shown that a correct treatment of strongly bound electrons gives a quantitative estimate of and within 3 - 1 expansion coefficients for and are given as an explicit function of the electron number

Tartu ehk unbewusste Ängste / Rauno Thomas Moss ; interv. Harry Liivrand

Index Scriptorium Estoniae

Moss, Rauno Thomas, 1977-

2008-01-01

Rauno Thomas Mossi (1977) näitus "Silent Tartu aka Clinical" Vaal galeriis. Kunstniku eluloolisi andmeid, loomingust, alasti mehekeha kujutamisest. Töötab Tartu Ülikoolis joonistamise ja plastilise anatoomia õppejõuna. Tema lemmikkunstnikud

Cold pasta phase in the extended Thomas-Fermi approximation

Science.gov (United States)

Avancini, S. S.; Bertolino, B. P.

2015-10-01

In this paper, we aim to obtain more accurate values for the transition density to the homogenous phase in the nuclear pasta that occurs in the inner crust of neutron stars. To that end, we use the nonlinear Walecka model at zero temperature and an approach based on the extended Thomas-Fermi (ETF) approximation.

Thomas Hopley and Mid-Victorian Attitudes to Corporal Punishment

Science.gov (United States)

Middleton, Jacob

2005-01-01

This paper discusses the trial of Thomas Hopley, accused of killing his pupil Reginald Cancellor in 1860 during an act of corporal punishment. The case provoked immediate sensational interest and became an important defining point in how corporal punishment is treated in British law. Established by this trial was the test that any corporal…

Waren Judas en Thomas gnostici? Het evangelie naar Johannes ...

African Journals Online (AJOL)

and Philip are also more conspicuous characters in the Gospel of John than in the Synoptics. This challenges scholars to read these sections in relation to Gnosticism. The article aims at reading the scenes dealing with Jude and Thomas in John's gospel with a Gnostic framework in mind. These texts gain more profile than ...

Philosophical Creationism: Thomas Aquinas’ Metaphysics of Creatio ex Nihilo

Directory of Open Access Journals (Sweden)

Andrzej Maryniarczyk

2016-03-01

Full Text Available All philosophers, beginning with the pre-Socratics, through Plato and Aristotle, and up to Thomas Aquinas, accepted as a certain that the world as a whole existed eternally. The foundation for the eternity of the world was the indestructible and eternal primal building material of the world, a material that existed in the form of primordial material elements (the Ionians, in the form of ideas (Plato, or in the form of matter, eternal motion, and the first heavens (Aristotle. The article outlines the main structure of the philosophical theory of creation ex nihilo developed by St. Thomas Aquinas and indebted to his metaphysical thought. It shows the wisdom-based and ratiocinative foundation of the rational cognition of reality—reality that comes from the personal creative act of God. It concludes that the perception that the beings called to existence by the personal act of God the Creator are intelligible is the ultimate rational justification for the fact that our human cognition, love, and spiritual creativity are rational.

Full depth bituminous recycling of I-70, Thomas County, Kansas

Science.gov (United States)

2004-01-01

In 1990, 13 full depth asphalt pavement test sections were built on a portion of I-70 in Thomas County, Kansas. Various combinations of hot mix and cold recycle mixes with different additives were used to build the test sections. Two of the test sect...

USA saadik loodab võita eestlaste poolehoiu / Joseph M. DeThomas

Index Scriptorium Estoniae

DeThomas, Joseph M.

2003-01-01

USA suursaadik Eestis Joseph DeThomas vastab on-line intervjuus Eesti Päevalehe lugejate küsimustele Iraagi ründamise, USA ja Euroopa vahelise lõhe, USA Eesti saatkonna võimaliku ümberkolimise kohta

Stereocontrol during the radical polymerization of methyl methacrylates with combined Lewis acids:Aluminium trichloride（AlCl3） and iron dichloride tetrahydrate

Institute of Scientific and Technical Information of China (English)

无

2010-01-01

The radical polymerization of methyl methacrylate(MMA) was carried out in the presence of combined Lewis acids of the AlCl3-FeCl2 system.Compared with the polymerization produced in the presence of single Lewis acids,AlCl3 or FeCl2,the MMA polymerization in the presence of AlCl3-FeCl2 composite in CHCl3 or 1-butanol produced a polymer with a higher isotacticity and in toluene produced a polymer with a much higher isotacticity(mm=50%) .The molecular weight and polydispersity of PMMA in the presence of Lewis acids were similar with those in the absence of Lewis acids,although Lewis acids decelerate the polymerization of MMA.The effects of the Lewis acids were greater in a solvent with a lower polarity.A possible stereocontrol mechanism of the polymerization was proposed.The Lewis acid composite of AlCl3-FeCl2 readily formed a complex with growing species.These complexes possessed apparent bulkiness that changes the direction of monomer addition to the growing radical center.

Teaching with Purpose: An Interview with Thomas E. Ludwig

Science.gov (United States)

Ludwig, Timothy D.; Ludwig, David J.

2010-01-01

Thomas E. Ludwig is the John Dirk Werkman Professor of Psychology at Hope College, where he joined the faculty in 1977 after receiving his PhD in development and aging from Washington University in St. Louis. His research focuses on developmental issues in cognitive neuropsychology. He is also the author or coauthor of more than a dozen sets of…

Providing Total Quality Fundamentals: 1995 Workshops for the NASA Lewis Research Center's Technical Services Directorate

Science.gov (United States)

Antczak, Paul; Jacinto,Gilda; Simek, Jimmy

1997-01-01

The National Aeronautics and Space Administration's (NASA) agency-wide movement to cultivate a quality workplace is the basis for Lewis Research Center to implement Total Quality Fundamentals (TQF) initiatives. The Lewis Technical Services Directorate (TSD) introduced the Total Quality Fundamentals (TQF) workshops to its work force as an opportunity to introduce the concepts and principles of TQF. These workshops also provided the participants with the opportunity to dialogue with fellow TSD employees and managers. This report describes, through the perspective of the Lewis TSD TQF Coaches, how the TQF work- shop process was accomplished in TSD. It describes the structure for addressing the need, implementation process, input the TSD Coaches provided, common themes and concerns raised, conclusions, and recommendations. The Coaches concluded that these types of workshops could be the key to open the communication channels that are necessary to help everyone at Lewis understand where they fit in the organization. TQF workshops can strengthen the participant's connection with the Mission, Vision of the Center, and Vision of the Agency. Reconunendations are given based on these conclusions that can help the TSD Quality Board develop attainable measures towards a quality workplace.

C-CAP USVI, St. Thomas 2007-2012 Land Cover Change Analysis

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains the 2007 and 2012 classifications of St. Thomas and can be used to analyze change. This data set utilized CIR imagery captured from Microsoft...

some aspects of fisheries ecology in thomas dam, kano nigeria 192

African Journals Online (AJOL)

userpc

The diversity, length-weight relationship and condition factor of fish species of Thomas Dam,. Dambatta Kano ..... of these species in northern Nigeria as reported ... obtained in other fresh water bodies within the .... North America, 1: 584-590.

Impairments of speech fluency in Lewy body spectrum disorder.

Science.gov (United States)

Ash, Sharon; McMillan, Corey; Gross, Rachel G; Cook, Philip; Gunawardena, Delani; Morgan, Brianna; Boller, Ashley; Siderowf, Andrew; Grossman, Murray

2012-03-01

Few studies have examined connected speech in demented and non-demented patients with Parkinson's disease (PD). We assessed the speech production of 35 patients with Lewy body spectrum disorder (LBSD), including non-demented PD patients, patients with PD dementia (PDD), and patients with dementia with Lewy bodies (DLB), in a semi-structured narrative speech sample in order to characterize impairments of speech fluency and to determine the factors contributing to reduced speech fluency in these patients. Both demented and non-demented PD patients exhibited reduced speech fluency, characterized by reduced overall speech rate and long pauses between sentences. Reduced speech rate in LBSD correlated with measures of between-utterance pauses, executive functioning, and grammatical comprehension. Regression analyses related non-fluent speech, grammatical difficulty, and executive difficulty to atrophy in frontal brain regions. These findings indicate that multiple factors contribute to slowed speech in LBSD, and this is mediated in part by disease in frontal brain regions. Copyright © 2011 Elsevier Inc. All rights reserved.

Building new discrete supramolecular assemblies through the interaction of iso-tellurazole N-oxides with Lewis acids and bases.

Science.gov (United States)

Ho, Peter C; Jenkins, Hilary A; Britten, James F; Vargas-Baca, Ignacio

2017-10-13

The supramolecular macrocycles spontaneously assembled by iso-tellurazole N-oxides are stable towards Lewis bases as strong as N-heterocyclic carbenes (NHC) but readily react with Lewis acids such as BR 3 (R = Ph, F). The electron acceptor ability of the tellurium atom is greatly enhanced in the resulting O-bonded adducts, which consequently enables binding to a variety of Lewis bases that includes acetonitrile, 4-dimethylaminopyridine, 4,4'-bipyridine, triphenyl phosphine, a N-heterocyclic carbene and a second molecule of iso-tellurazole N-oxide.

A Dialectics of Reason and Instinct: Thomas Mann’s Magic Mountain

Directory of Open Access Journals (Sweden)

Ciro Schmidt Andrade

Full Text Available The whole Thomas Mann’s work is a reflection of the permanent tension between instinct and reason, the irruption of the repressed and life order. This is particularly manifested in his work The Magic Mountain.

Lewis Base Activation of Silyl Acetals: Iridium-Catalyzed Reductive Horner-Wadsworth-Emmons Olefination.

Science.gov (United States)

Dakarapu, Udaya Sree; Bokka, Apparao; Asgari, Parham; Trog, Gabriela; Hua, Yuanda; Nguyen, Hiep H; Rahman, Nawal; Jeon, Junha

2015-12-04

A Lewis base promoted deprotonative pronucleophile addition to silyl acetals has been developed and applied to the iridium-catalyzed reductive Horner-Wadsworth-Emmons (HWE) olefination of esters and the chemoselective reduction of the resulting enoates. Lewis base activation of silyl acetals generates putative pentacoordinate silicate acetals, which fragment into aldehydes, silanes, and alkoxides in situ. Subsequent deprotonative metalation of phosphonate esters followed by HWE with aldehydes furnishes enoates. This operationally convenient, mechanistically unique protocol converts the traditionally challenging aryl, alkenyl, and alkynyl esters to homologated enoates at room temperature within a single vessel.

Jude the Obscure de Thomas Hardy et l’autorité de la lettre Jude the Obscure by Thomas Hardy and the Power of the Letter

Directory of Open Access Journals (Sweden)

Stéphanie Bernard

2009-10-01

Full Text Available Thomas Hardy is usually considered a Victorian writer. Nonetheless, his last novel Jude the Obscure, announced the era of modernity which started with the twentieth century, just before he abandoned fiction to concentrate on poetry. With modernity looming in the background, Jude the Obscure allowed for the rewriting of tragedy. Urban settings have replaced the countryside and all signs of transcendence have vanished from society. This defeat of the divine is nevertheless accompanied by a great number of biblical references. Thomas Hardy quotes and uses the Divine Letter as if to rewrite it rather than to appear faithful to the Word. The text keeps offering itself to the spell of voice: it does so when Job utters words of revolt and then worship, when Jude lets his imagination flow from his lips so that he seems to live on in the text after he is dead, or when the voice of the novelist becomes the voice of a poet.

Lewis Acid-Base Chemistry of 7-Azaisoindigo-Based Organic Semiconductors.

Science.gov (United States)

Randell, Nicholas M; Fransishyn, Kyle M; Kelly, Timothy L

2017-07-26

Low-band-gap organic semiconductors are important in a variety of organic electronics applications, such as organic photovoltaic devices, photodetectors, and field effect transistors. Building on our previous work, which introduced 7-azaisoindigo as an electron-deficient building block for the synthesis of donor-acceptor organic semiconductors, we demonstrate how Lewis acids can be used to further tune the energies of the frontier molecular orbitals. Coordination of a Lewis acid to the pyridinic nitrogen of 7-azaisoindigo greatly diminishes the electron density in the azaisoindigo π-system, resulting in a substantial reduction in the lowest unoccupied molecular orbital (LUMO) energy. This results in a smaller highest occupied molecular orbital-LUMO gap and shifts the lowest-energy electronic transition well into the near-infrared region. Both H + and BF 3 are shown to coordinate to azaisoindigo and affect the energy of the S 0 → S 1 transition. A combination of time-dependent density functional theory and UV/vis and 1 H NMR spectroscopic titrations reveal that when two azaisoindigo groups are present and high concentrations of acid are used, both pyridinic nitrogens bind Lewis acids. Importantly, we demonstrate that this acid-base chemistry can be carried out at the solid-vapor interface by exposing thin films of aza-substituted organic semiconductors to vapor-phase BF 3 ·Et 2 O. This suggests the possibility of using the BF 3 -bound 7-azaisoindigo-based semiconductors as n-type materials in various organic electronic applications.

Thomas Mann's "Tobias Mindernickel" in Light of Sartre's "Being-for-Others"

Directory of Open Access Journals (Sweden)

Beth Bjorklund

1978-01-01

Full Text Available Sartre's analysis of "Being-for-Others" in Being and Nothingness describes the Self-Other relationship as essentially one of conflict, with the Self attempting either to dominate or to be dominated by the Other. Subject-Object relations are a common theme also in the early works of Thomas Mann, who gives artistic expression to many of the same problems which Sartre later formalized in a philosophical theory. The sado-masochistic character, which is portrayed in several of Thomas Mann's narratives, receives its strongest expression in the story "Tobias Mindernickel," which is here singled out for analysis. Humiliation gives rise to aggression, as the protagonist feels both an attraction and a repulsion for his surrogate lover, a dog. The interpersonal relationships revealed here serve as paradigmatic illustration of Sartre's theory of "Concrete Relations with Others."

Two-centre interference effects on the Thomas two-step scattering mechanisms

International Nuclear Information System (INIS)

Adivi, E Ghanbari

2010-01-01

The charge transfer process in the collision of fast protons with hydrogen molecules is theoretically investigated using the second-order Born approximation with correct boundary conditions. In addition to two first-order terms, the present calculations include the three second-order terms which correspond to the Thomas two-step scattering mechanisms. The interference effects, due to the scattering of the particles from two atomic centres, on the electron capture differential cross sections vary significantly with the orientation of the molecule and with the impact energy. After the averaging over all molecular orientations the interference patterns disappear but the Thomas peak becomes more pronounced. These patterns are also apparent in the differential cross sections as a function of the angle between the molecular axis and the incident beam direction. The integrated cross sections are calculated and the results are compared with available experimental data.

Insights into translation and the original text: Thomas Mofolo's Chaka

African Journals Online (AJOL)

This paper aims to explore the strategies applied during the translation of chosen passages from the original Sesotho text of Chaka by Thomas Mofolo into English. Insights expressed here originate from participation in the translation workshops during the conference on “Translating Mofolo”. Different stages of the ...

Religious Conscience and Civic Conscience in Thomas Hobbes's Civic Philosophy.

Science.gov (United States)

Pepperell, Keith C.

1989-01-01

This article discusses Thomas Hobbes' concept of conscience, the historical context in which the concept was formulated, and Hobbes' conclusion that civil law takes precedence over religious conscience. Hobbes' views are related to the debate between Pratte and Losito over the interaction between religious and civic conscience. (IAH)

Some aspects of fisheries ecology in Thomas dam, Kano Nigeria ...

African Journals Online (AJOL)

The diversity, length-weight relationship and condition factor of fish species of Thomas Dam, Dambatta Kano were studied fortnightly between November, 2016 and February, 2017. Fish species were collected using line nets, cast nets, hooks and traps; weighted to the nearest gram and standard length measured to the ...

Astronaut Thomas Stafford during water egress training in Gulf of Mexico

Science.gov (United States)

1965-01-01

Astronaut Thomas P. Stafford, Gemini 6 prime crew pilot, climbs out of a boilerplate model of a Gemini spacecraft during water egress training in the Gulf of Mexico. A NASA swimmer in the water nearby assists in the exercise.

Falta de associação entre o sistema Lewis e obstrução coronariana Lack of association between the Lewis blood group system and coronary vessel obstruction

Directory of Open Access Journals (Sweden)

Juliana R. Cintra

2008-04-01

Full Text Available Estudos prévios demonstraram associação entre o sistema Lewis e a doença arterial coronariana (DAC a partir da observação de que o fenótipo eritrocitário Le(a-b- era prevalente em pacientes e propuseram que esse fenótipo representava um novo marcador de risco para essa doença. Esse estudo teve como objetivo verificar a prevalência desse marcador em pacientes brasileiros com indicação de realizar cineangiocoronariografia. A fenotipagem do sistema Lewis foi realizada pelo método gel centrifugação, e a genotipagem do loco LE foi feita pelo método PCR-RFLP. Cento e oitenta e três pacientes (114 masculinos e 69 femininos, com média de idade igual a 59,1 anos (DP ± 12,37; mediana 60 foram selecionados. Cento e vinte e um (66,1% pacientes apresentaram obstrução coronariana de qualquer grau, sendo essa característica duas vezes mais elevada no sexo masculino do que no feminino (p=0,07. As freqüências dos fenótipos eritrocitários Lewis foram semelhantes em ambos os grupos de pacientes e o fenótipo Le(a-b- mostrou-se não estar associado à presença de obstrução coronariana (p=0,36. Elevados índices de discrepância fenótipo-genótipo foram observados entre os pacientes Le(a-b-, com base na genotipagem das mutações T59G (86,7% e T1067A (90,0%. As freqüências dos alelos T e G (posição 59 e T e A (posição 1067 não mostraram diferenças estatisticamente significantes entre os pacientes com e sem obstrução coronariana (p = 0,52 e p = 0,44, respectivamente. Esses resultados demonstram que o sistema Lewis não está associado à presença de obstrução coronariana e não suportam a proposição de que o fenótipo eritrocitário Le(a-b- representa um marcador de risco para essa doença na casuística brasileira.Previous studies have shown an association between the Lewis blood group system and coronary artery disease (CAD from the observation that the Le(a-b- red blood cell phenotype was prevalent among these patients

Biological aspects and life table of Uroleucon ambrosiae (Thomas, 1878) as a function of temperature

OpenAIRE

Auad Alexander Machado; Moraes Jair Campos de

2003-01-01

The aphid Uroleucon ambrosiae (Thomas) is considered a pest of hidroponically-grown lettuce, but basic and applied information on its control are scarce in Brazil. The aim of this study was to determine the effect of different temperatures on biological aspects and life history of U. ambrosiae (Thomas) developing on hydroponic lettuce (Lactuca sativa L.) crop. Newly emerged nymphs were placed on 4-cm discs of hydroponic lettuce, var. Verônica, which were maintained on 5-cm Petri dishes, at te...

Thomas Kibble visits CERN

CERN Multimedia

Rosaria Marraffino

2014-01-01

Emeritus Professor Sir Thomas W.B. Kibble, from Imperial College London visited LHC for the first time last week and delivered a colloquium on the genesis of electroweak unification and the Brout-Englert-Higgs mechanism.   From left to right: Jim Virdee, Tiziano Camporesi, Tom Kibble and Austin Ball on the visit to CMS. On his way back from Trieste, where he received the Abdus Salam International Centre for Theoretical Physics' Dirac Medal, Tom Kibble stopped by CERN for his first visit to the LHC. Kibble had a standing invitation from Jim Virdee, former CMS spokesperson, who is also a researcher from Imperial College London. Peter Jenni (left) and Tom Kibble tour the ATLAS detector. (Image: Erwan Bertrand) Kibble made the trip to CERN a family outing and brought along 14 relatives,  including his children and grandchildren. He visited the ATLAS detector with Peter Jenni, its former spokesperson, on Friday 10 October. In the afternoon, Kibble delivered a colloquium in the...

ThomAs AquinAs: on LAW, TyrAnny And resisTAnce

African Journals Online (AJOL)

Thomas Aquinas's notion on law, tyranny and resistance served as a limitation on .... is obliged to disobey it, as did the holy martyrs who suffered death rather than ..... and, what is worse, he brings upon himself the most terrible penalty, namely.

The perturbation of the condensed medium in the Thomas-Fermi model

Science.gov (United States)

Kyarov, A. Kh; Savintsev, A. P.

2018-01-01

The research presented in this work is the continuation of the previous studies, which gave a qualitative estimating solution of the problem. The aim of this work is the calculation of static perturbation of condensed medium in the Thomas-Fermi approximation.

The Invention Factory: Thomas Edison's Laboratories. Teaching with Historic Places.

Science.gov (United States)

Bolger, Benjamin

This lesson explores the group of buildings in West Orange, New Jersey, built in 1887, that formed the core of Thomas Edison's research and development complex. They consisted of chemistry, physics, and metallurgy laboratories; machine shop; pattern shop; research library; and rooms for experiments. The lesson explains that the prototypes (ideas…

Lewis Acid Pairs for the Activation of Biomass-derived Oxygenates in Aqueous Media

Energy Technology Data Exchange (ETDEWEB)

Roman, Yuriy [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

2015-09-14

The objective of this project is to understand the mechanistic aspects behind the cooperative activation of oxygenates by catalytic pairs in aqueous media. Specifically, we will investigate how the reactivity of a solid Lewis acid can be modulated by pairing the active site with other catalytic sites at the molecular level, with the ultimate goal of enhancing activation of targeted functional groups. Although unusual catalytic properties have been attributed to the cooperative effects promoted by such catalytic pairs, virtually no studies exist detailing the use heterogeneous water-tolerant Lewis pairs. A main goal of this work is to devise rational pathways for the synthesis of porous heterogeneous catalysts featuring isolated Lewis pairs that are active in the transformation of biomass-derived oxygenates in the presence of bulk water. Achieving this technical goal will require closely linking advanced synthesis techniques; detailed kinetic and mechanistic investigations; strict thermodynamic arguments; and comprehensive characterization studies of both materials and reaction intermediates. For the last performance period (2014-2015), two technical aims were pursued: 1) C-C coupling using Lewis acid and base pairs in Lewis acidic zeolites. Tin-, zirconium-, and hafnium containing zeolites (e.g., Sn-, Zr-, and Hf-Beta) are versatile solid Lewis acids that selectively activate carbonyl functional groups. In this aim, we demonstrate that these zeolites catalyze the cross-aldol condensation of aromatic aldehydes with acetone under mild reaction conditions with near quantitative yields. NMR studies with isotopically labeled molecules confirm that acid-base pairs in the Si-O-M framework ensemble promote soft enolization through α-proton abstraction. The Lewis acidic zeolites maintain activity in the presence of water and, unlike traditional base catalysts, in acidic solutions. 2) One-pot synthesis of MWW zeolite nanosheets for activation of bulky substrates. Through

An order in Lewy body disorders: Retrograde degeneration in hyperbranching axons as a fundamental structural template accounting for focal/multifocal Lewy body disease.

Science.gov (United States)

Uchihara, Toshiki

2017-04-01

Initial clinical recognition of "paralysis agitans" by James Parkinson was expanded by Jean-Martin Charcot, who recognized additional clinical findings of his own, such as slowness (distinct from paralysis), rigidity (distinct from spasticity) and characteristic countenance. Charcot assembled these findings under the umbrella of "Parkinson disease (PD)". This purely clinical concept was so prescient and penetrating that subsequent neuropathological and biochemical evidences were ordered along this axis to establish the nigra-central trinity of PD (dopamine depletion, nigral lesion with Lewy bodies: LBs). Although dramatic efficacy of levodopa boosted an enthusiasm for this nigra-centralism, extranigral lesions were identified, especially after identification of alpha-synuclein (αS) as a major constituent of LBs. Frequent αS lesions in the lower brainstem with their presumed upward spread were coupled with the self-propagating property of αS molecule, as a molecular template, to constitute the prion-Braak hypothesis. This hybrid concept might expectedly explain clinical, structural and biochemical features of PD/dementia with Lewy bodies (DLB) as if they were stereotypic. In spite of this ordered explanation, recent studies have demonstrated unexpectedly that αS lesions in the human brain, as well as their corresponding clinical manifestations, are much more disordered. Even with such a chaos of LB disorders, affected neuronal groups are uniformly characterized by hyperbranching axons, which may facilitate distal-dominant degeneration and retrograde progression of LB-related degeneration along axons as a fundamental structural order to template LB disorders. This "structural template" hypothesis may explain why: (i) some selective groups are prone to develop Lewy pathology; (ii) their clinical manifestations (especially non-motor components) are vague and generalized without somatotopic accentuation; (iii) distal axons and terminals are preferentially affected

Effects of non-unity Lewis number of gas-phase species in turbulent nonpremixed sooting flames

KAUST Repository

Attili, Antonio

2016-02-13

Turbulence statistics from two three-dimensional direct numerical simulations of planar n-heptane/air turbulent jets are compared to assess the effect of the gas-phase species diffusion model on flame dynamics and soot formation. The Reynolds number based on the initial jet width and velocity is around 15, 000, corresponding to a Taylor scale Reynolds number in the range 100 ≤ Reλ ≤ 150. In one simulation, multicomponent transport based on a mixture-averaged approach is employed, while in the other the gas-phase species Lewis numbers are set equal to unity. The statistics of temperature and major species obtained with the mixture-averaged formulation are very similar to those in the unity Lewis number case. In both cases, the statistics of temperature are captured with remarkable accuracy by a laminar flamelet model with unity Lewis numbers. On the contrary, a flamelet with a mixture-averaged diffusion model, which corresponds to the model used in the multi-component diffusion three-dimensional DNS, produces significant differences with respect to the DNS results. The total mass of soot precursors decreases by 20-30% with the unity Lewis number approximation, and their distribution is more homogeneous in space and time. Due to the non-linearity of the soot growth rate with respect to the precursors\\' concentration, the soot mass yield decreases by a factor of two. Being strongly affected by coagulation, soot number density is not altered significantly if the unity Lewis number model is used rather than the mixture-averaged diffusion. The dominant role of turbulent transport over differential diffusion effects is expected to become more pronounced for higher Reynolds numbers. © 2016 The Combustion Institute.

Effects of non-unity Lewis number of gas-phase species in turbulent nonpremixed sooting flames

KAUST Repository

Attili, Antonio; Bisetti, Fabrizio; Mueller, Michael E.; Pitsch, Heinz

2016-01-01

Turbulence statistics from two three-dimensional direct numerical simulations of planar n-heptane/air turbulent jets are compared to assess the effect of the gas-phase species diffusion model on flame dynamics and soot formation. The Reynolds number based on the initial jet width and velocity is around 15, 000, corresponding to a Taylor scale Reynolds number in the range 100 ≤ Reλ ≤ 150. In one simulation, multicomponent transport based on a mixture-averaged approach is employed, while in the other the gas-phase species Lewis numbers are set equal to unity. The statistics of temperature and major species obtained with the mixture-averaged formulation are very similar to those in the unity Lewis number case. In both cases, the statistics of temperature are captured with remarkable accuracy by a laminar flamelet model with unity Lewis numbers. On the contrary, a flamelet with a mixture-averaged diffusion model, which corresponds to the model used in the multi-component diffusion three-dimensional DNS, produces significant differences with respect to the DNS results. The total mass of soot precursors decreases by 20-30% with the unity Lewis number approximation, and their distribution is more homogeneous in space and time. Due to the non-linearity of the soot growth rate with respect to the precursors' concentration, the soot mass yield decreases by a factor of two. Being strongly affected by coagulation, soot number density is not altered significantly if the unity Lewis number model is used rather than the mixture-averaged diffusion. The dominant role of turbulent transport over differential diffusion effects is expected to become more pronounced for higher Reynolds numbers. © 2016 The Combustion Institute.

Two-step method for creating a gastric tube during laparoscopic-thoracoscopic Ivor-Lewis esophagectomy.

Science.gov (United States)

Liu, Yu; Li, Ji-Jia; Zu, Peng; Liu, Hong-Xu; Yu, Zhan-Wu; Ren, Yi

2017-12-07

To introduce a two-step method for creating a gastric tube during laparoscopic-thoracoscopic Ivor-Lewis esophagectomy and assess its clinical application. One hundred and twenty-two patients with middle or lower esophageal cancer who underwent laparoscopic-thoracoscopic Ivor-Lewis esophagectomy at Liaoning Cancer Hospital and Institute from March 2014 to March 2016 were included in this study, and divided into two groups based on the procedure used for creating a gastric tube. One group used a two-step method for creating a gastric tube, and the other group used the conventional method. The two groups were compared regarding the operating time, surgical complications, and number of stapler cartridges used. The mean operating time was significantly shorter in the two-step method group than in the conventional method group [238 (179-293) min vs 272 (189-347) min, P creating a gastric tube during laparoscopic-thoracoscopic Ivor-Lewis esophagectomy has the advantages of simple operation, minimal damage to the tubular stomach, and reduced use of stapler cartridges.

M O Ikeke Appraisal of Thomas Berry's Idea of Technological ...

African Journals Online (AJOL)

Oduor

understanding of the natural world to the solution of practical problems”. According to ... technology is not needed, but its ethical use is imperative. We set out ... named William Nathan after his father, became known as Thomas, the name he took for his ..... Nigeria, oil companies do not follow the best international standards.

Fasihi ya Kiswahili na rushwa Tanzania: Thomas A. R. Kamugisha ...

African Journals Online (AJOL)

Makala hii inajaribu kuelezea mchango wa fasihi ya Kiswahili katika kuijadili rushwa. Kwa kurejea kwenye Riwaya ya Thomas A.R. Kamugisha Kitu Kidogo tu! makala hii inasawilisha miongo takribani mitatu ya dhana ya “kitu kidogo” na athari zake kwa jamii ya Tanzania. Kwa kuijadili riwaya ya Kitu Kidogo tu! makala hii ...

Modified NASA-Lewis chemical equilibrium code for MHD applications

Science.gov (United States)

Sacks, R. A.; Geyer, H. K.; Grammel, S. J.; Doss, E. D.

1979-01-01

A substantially modified version of the NASA-Lewis Chemical Equilibrium Code was recently developed. The modifications were designed to extend the power and convenience of the Code as a tool for performing combustor analysis for MHD systems studies. The effect of the programming details is described from a user point of view.

Thomas George Lee - Implantation and early development of North American rodents

DEFF Research Database (Denmark)

Carter, Anthony Michael

2011-01-01

A century ago Thomas G. Lee amassed an unparalleled collection of developmental series of North American rodents such as the thirteen-lined ground squirrel, the Plains pocket gopher and Merriam's kangaroo rat. He was the first to describe the initial attachment of the squirrel blastocyst to the a......A century ago Thomas G. Lee amassed an unparalleled collection of developmental series of North American rodents such as the thirteen-lined ground squirrel, the Plains pocket gopher and Merriam's kangaroo rat. He was the first to describe the initial attachment of the squirrel blastocyst...... to the antimesometrial side of the uterus. The full potential of Lee's material was not realized until after his death, when it came into the possession of Mossman. The latter relied heavily on Lee's collection when writing his seminal monograph on the comparative morphogenesis of fetal membranes and much of Lee...

Grade 12 Diploma Examination, English 30. Part B: Reading (Multiple Choice). Readings Booklet. 1986 Edition.

Science.gov (United States)

Alberta Dept. of Education, Edmonton.

Intended for students taking the Grade 12 Examination in English 30 in Alberta, Canada, this reading test (to be administered along with the questions booklet) contains 10 short reading selections taken from fiction, nonfiction, poetry, and drama, including the following: "My Magical Metronome" (Lewis Thomas); "Queen Street…

Imidazolinium and amidinium salts as Lewis acid organocatalysts

Directory of Open Access Journals (Sweden)

Oksana Sereda

2012-10-01

Full Text Available The application of imidazolinium and amidinium salts as soft Lewis acid organocatalysts is described. These salts were suitable catalysts for the activation of unsaturated thioesters in a Diels–Alder reaction and in the ring opening of thiiranes and epoxides. The products were isolated in good yields. The mild catalysts did not cause desulfurization of the products containing a thiol or thiocarbonyl group.

Thomas Kuhn e a nova historiografia da ciência

Directory of Open Access Journals (Sweden)

Bernardo Jefferson de Oliveira

2002-01-01

Full Text Available This article tries to show the Thomas Kuhn's critics to some conceptions of the contemporary historiography of science that became radical many of the positions formulated initially by Kuhn himself. It is still intended to show that the new orientation of Kuhn, starting from his critic to his successors, approaches him more of his initial influences, especially, Ludwig Wittgenstein and Ludwik Fleck.

Energy efficiency campaign for residential housing at the Fort Lewis army installation

Energy Technology Data Exchange (ETDEWEB)

AH McMakin; RE Lundgren; EL Malone

2000-02-23

In FY1999, Pacific Northwest National Laboratory conducted an energy efficiency campaign for residential housing at the Fort Lewis Army Installation near Tacoma, Washington. Preliminary weather-corrected calculations show energy savings of 10{percent} from FY98 for energy use in family housing. This exceeded the project's goal of 3{percent}. The work was funded by the U.S. DOEs Federal Energy Management Program (FEMP), Office of Energy Efficiency and Renewable Energy. The project adapted FEMP's national ``You Have the Power Campaign'' at the local level, tailoring it to the military culture. The applied research project was designed to demonstrate the feasibility of tailored, research-based strategies to promote energy conservation in military family housing. In contrast to many energy efficiency efforts, the campaign focused entirely on actions residents could take in their own homes, as opposed to technology or housing upgrades. Behavioral change was targeted because residents do not pay their own utility bills; thus other motivations must drive personal energy conservation. This campaign augments ongoing energy savings from housing upgrades carried out by Fort Lewis. The campaign ran from September 1998 through August 1999. The campaign strategy was developed based on findings from previous research and on input from residents and officials at Fort Lewis. Energy use, corrected to account for weather differences, was compared with the previous year's use. Survey responses from 377 of Fort Lewis residents of occupied housing showed that the campaign was moderately effective in promoting behavior change. Of those who were aware of the campaign, almost all said they were now doing one or more energy-efficient things that they had not done before. Most people were motivated by the desire to do the right thing and to set a good example for their children. They were less motivated by other factors.

Thomas precession: correct and incorrect solutions

International Nuclear Information System (INIS)

Malykin, Grigorii B

2006-01-01

A wealth of different expressions for the frequency of the Thomas precession (TP) can be found in the literature, with the consequence that this issue has been discussed over a long period of time. It is shown that the correct result was obtained in the works of several authors, which were published more than forty years ago but remained unnoticed against the background of numerous erroneous works. Several TP-related physical paradoxes formulated primarily to disprove the special relativity theory are shown to be fallacious. Different techniques for deriving the correct expression are considered and the reasons for the emergence of the main incorrect expressions for the TP frequency are analyzed. (from the history of physics)

Thomas-Fermi theory for atomic nuclei revisited

International Nuclear Information System (INIS)

Centelles, M.; Schuck, P.; Vinas, X.

2007-01-01

The recently developed semiclassical variational Wigner-Kirkwood (VWK) approach is applied to finite nuclei using external potentials and self-consistent mean fields derived from Skyrme interactions and from relativistic mean field theory. VWK consists of the Thomas-Fermi part plus a pure, perturbative h 2 correction. In external potentials, VWK passes through the average of the quantal values of the accumulated level density and total energy as a function of the Fermi energy. However, there is a problem of overbinding when the energy per particle is displayed as a function of the particle number. The situation is analyzed comparing spherical and deformed harmonic oscillator potentials. In the self-consistent case, we show for Skyrme forces that VWK binding energies are very close to those obtained from extended Thomas-Fermi functionals of h 4 order, pointing to the rapid convergence of the VWK theory. This satisfying result, however, does not cure the overbinding problem, i.e., the semiclassical energies show more binding than they should. This feature is more pronounced in the case of Skyrme forces than with the relativistic mean field approach. However, even in the latter case the shell correction energy for e.g., 208 Pb turns out to be only ∼-6 MeV what is about a factor two or three off the generally accepted value. As an ad hoc remedy, increasing the kinetic energy by 2.5%, leads to shell correction energies well acceptable throughout the periodic table. The general importance of the present studies for other finite Fermi systems, self-bound or in external potentials, is pointed out

Anion sensing with a Lewis acidic BODIPY-antimony(v) derivative.

Science.gov (United States)

Christianson, Anna M; Gabbaï, François P

2017-02-21

We describe the synthesis of a BODIPY dye substituted with a Lewis acidic antimony(v) moiety. This compound, which has been fully characterized, shows a high affinity for small anions including fluoride and cyanide, the complexation of which elicits a fluorescence turn-on response.

Q & A with Ed Tech Leaders: Interview with Brian Lewis

Science.gov (United States)

Shaughnessy, Michael F.; Fulgham, Susan M.

2013-01-01

Brian Lewis, International Society for Technology in Education (ISTE) chief executive officer, is an education advocate and leader specializing in management and governance, policy, corporate communications, branding, and marketing. He provides leadership to ISTE's Washington, DC, and Eugene, Oregon, offices and directs organizational…

Numerical comparison of atomic binding energies calculated by Thomas-Fermi like formulas

International Nuclear Information System (INIS)

Donnamaria, M.C.; Castro, E.A.; Fernandez, F.M.

1985-01-01

We apply in an exhaustive way formulas of Thomas-Fermi nature to determine atomic ground state energies. Results are compared with Hartree-Fock SCF data and the different methods are analysed in a comparative fashion. (authors)

Self-Assembled Nanocomposite Organic Polymers with Aluminum and Scandium as Heterogeneous Water-Compatible Lewis Acid Catalysts.

Science.gov (United States)

Miyamura, Hiroyuki; Sonoyama, Arisa; Hayrapetyan, Davit; Kobayashi, Shū

2015-09-01

While water-compatible Lewis acids have great potential as accessible and environmentally benign catalysts for various organic transformations, efficient immobilization of such Lewis acids while keeping high activity and without leaching of metals even under aqueous conditions is a challenging task. Self-assembled nanocomposite catalysts of organic polymers, carbon black, aluminum reductants, and scandium salts as heterogeneous water-compatible Lewis acid catalysts are described. These catalysts could be successfully applied to various C-C bond-forming reactions without leaching of metals. Scanning transmission electron microscopy analyses revealed that the nanocomposite structure of Al and Sc was fabricated in these heterogeneous catalysts. It is noted that Al species, which are usually decomposed rapidly in the presence of water, are stabilized under aqueous conditions. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

ɑ-Synuclein strains and seeding in Parkinson's disease, incidental Lewy body disease, dementia with Lewy bodies and multiple system atrophy: similarities and differences.

Science.gov (United States)

Peelaerts, W; Bousset, L; Baekelandt, V; Melki, R

2018-04-27

Several age-related neurodegenerative disorders are characterized by the deposition of aberrantly folded endogenous proteins. These proteins have prion-like propagation and amplification properties but so far appear nontransmissible between individuals. Because of the features they share with the prion protein, PrP, the characteristics of pathogenic protein aggregates in several progressive brain disorders, including different types of Lewy body diseases (LBDs), such as Parkinson's disease (PD), multiple system atrophy (MSA) and dementia with Lewy bodies (DLB), have been actively investigated. Even though the pleomorphic nature of these syndromes might suggest different underlying causes, ɑ-synuclein (ɑSyn) appears to play an important role in this heterogeneous group of diseases (the synucleinopathies). An attractive hypothesis is that different types of ɑSyn protein assemblies have a unique and causative role in distinct synucleinopathies. We will discuss the recent research progress on ɑSyn assemblies involved in PD, MSA and DLB; their behavior as strains; current spreading hypotheses; their ability to seed centrally and peripherally; and their implication for disease pathogenesis.

Manson Chicks and Microskirted Cuties : Pornification in Thomas Pynchon's Inherent Vice

NARCIS (Netherlands)

Cook, S.J.|info:eu-repo/dai/nl/411939432

2015-01-01

Many sexual encounters in Thomas Pynchon’s fiction have occurred beyond the mainstream, generating theatres of perversity which dramatise the death wish and enact power relations from wider arenas. However, in Inherent Vice they change in nature. With the exception of scenes which use Charles Manson

Improved Lignin Polyurethane Properties with Lewis Acid Treatment

OpenAIRE

Chung, Hoyong; Washburn, Newell R.

2012-01-01

Chemical modification strategies to improve the mechanical properties of lignin-based polyurethanes are presented. We hypothesized that treatment of lignin with Lewis acids would increase the concentration of hydroxyl groups available to react with diisocyanate monomers. Under the conditions used, hydrogen bromide-catalyzed modification resulted in a 28% increase in hydroxyl group content. Associated increases in hydrophilicity of solvent-cast thin films were also recorded as evidenced by ...

Derivation of the Euler equations in Thomas-Fermi theories of a hot nuclear system

International Nuclear Information System (INIS)

Wang, C.

1992-01-01

The variational extreme condition with respect to statistical distribution of nucleons in momentum space is applied to derive the Euler equation of the nuclear density profile. The resultant Euler equation of the nuclear density profile is proven to be identical with that obtained in the usual Thomas-Fermi theories of a hot nuclear system where the variation is made with respect to the nuclear density profile. A Fermi-Dirac-type distribution appears as a result of variation in the present approach, while it is used as a given expression in obtaining the variation of the nuclear density profile in the usual Thomas-Fermi theories

Induction and flow cytometry identification of mixoploidy through ...

African Journals Online (AJOL)

faten omezzine

16436 Afr. J. Biotechnol. 1.8 and 2. ..... 29:35-40. Alberts B, Bray D, Lewis J, Raff M, Roberts K,Watson D (1994). ... Gu XF, Yang AF, Meng H, Zhang JR (2005). In vitro ... Punt W, Blackmore S, Nilsson S and Le Thomas A (1994). Glossary of.

Wounded Warrior Care and Reintegration Requires a Public-Private Partnership

Science.gov (United States)

2013-06-01

Rep.) Tim Walz of Minnesota introduced a bill to Congress (along with cosponsors Rep. Walter B. Jones, North Carolina; Rep. Thomas Rooney, Florida...Campbell, Fort Bragg, Fort Bliss , Fort Hood, and Joint Base Lewis-McChord. The idea behind these clinics on the nation’s largest military installations

Capital Grace of the Word Incarnate According to Saint Thomas Aquinas

Directory of Open Access Journals (Sweden)

Lucia Marie Siemering

2016-06-01

Full Text Available The doctrine of capital grace was developed during the Scholastic period and bears on many areas of theology including ecclesiology, Christology, sacraments, and Trinitarian theology with regard to the missions of the Word and the Holy Spirit. Viewed from a Christological standpoint, capital grace sheds light on how Christ in his human nature can be said to be a source of grace to the members of the Church. Following his contemporaries, the young Thomas Aquinas espoused a view in which Christ is a meritorious, ministerial, and dispositive cause of grace according to his human nature, and an efficient cause according to his divinity. After a deeper reading of John Damascene’s treatment of Christ’s humanity being an instrument of his divinity, Thomas was able to articulate a view in which Christ’s human nature is an instrumental efficient cause of grace. This view undergirds Aquinas’s strong conception of Christ as one acting person in two natures.

Thomas Kuhn's revolutions a historical and an evolutionary philosophy of science?

CERN Document Server

Marcum, James A

2015-01-01

This new edition of Thomas Kuhn's Revolution marks the 50th anniversary of the publication of Kuhn's most influential work. Drawing on the rich archival sources at MIT, and engaging fully with current scholarship, James Marcum provides the historical background to the development of The Structure of Scientific Revolutions. Exploring the shift Kuhn makes from a historical to an evolutionary philosophy of science and examining Kuhn's legacy in depth, Marcum answers key questions: What exactly was Kuhn's historiographic revolution and how did it come about? Why did it have the impact it did? What will its future impact be for both academia and society? Marcum's answers build a new portrait of Kuhn: his personality, his pedagogical style and the intellectual and social context in which he practiced his trade. Thomas Kuhn's Revolution shows how Kuhn transcends the boundaries of the philosophy of science, influencing sociologists, economists, theologians and even policy makers and politicians. This is a comprehensi...

The Organization of Narrative Discourse in Lewy Body Spectrum Disorder

Science.gov (United States)

Ash, Sharon; McMillan, Corey; Gross, Rachel G.; Cook, Philip; Morgan, Brianna; Boller, Ashley; Dreyfuss, Michael; Siderowf, Andrew; Grossman, Murray

2011-01-01

Narrative discourse is an essential component of day-to-day communication, but little is known about narrative in Lewy Body spectrum disorder (LBSD), including Parkinson's disease (PD), Parkinson's disease with dementia (PDD), and dementia with Lewy bodies (DLB). We performed a detailed analysis of a semi-structured speech sample in 32 non-aphasic patients with LBSD, and we related their narrative impairments to gray matter (GM) atrophy using voxel-based morphometry. We found that patients with PDD and DLB have significant difficulty organizing their narrative speech. This was correlated with deficits on measures of executive functioning and speech fluency. Regression analyses associated this deficit with reduced cortical volume in inferior frontal and anterior cingulate regions. These findings are consistent with a model of narrative discourse that includes executive as well as language components and with an impairment of the organizational component of narrative discourse in patients with PDD and DLB. PMID:21689852

NASA Lewis Helps Company With New Single-Engine Business Turbojet

Science.gov (United States)

1998-01-01

Century Aerospace Corporation, a small company in Albuquerque, New Mexico, is developing a six-seat aircraft powered by a single turbofan engine for general aviation. The company had completed a preliminary design of the jet but needed analyses and testing to proceed with detailed design and subsequent fabrication of a prototype aircraft. NASA Lewis Research Center used computational fluid dynamics (CFD) analyses to ferret out areas of excessive curvature in the inlet where separation might occur. A preliminary look at the results indicated very good inlet performance; and additional calculations, performed with vortex generators installed in the inlet, led to even better results. When it was initially determined that the airflow distortion pattern at the compressor face fell outside of the limits set by the engine manufacturer, the Lewis team studied possible solutions, selected the best, and provided recommendations. CFD results for the inlet system were so good that wind tunnel tests were unnecessary.

Operational criteria for senile dementia of Lewy body type (SDLT).

Science.gov (United States)

McKeith, I G; Perry, R H; Fairbairn, A F; Jabeen, S; Perry, E K

1992-11-01

Recent reports have suggested that brain stem and cortical Lewy body formation may identify a neurodegenerative disorder in elderly demented individuals which accounts for up to 20% of cases of senile dementia coming to autopsy. Retrospective analysis of case notes of 21 autopsy patients with neuropathologically proven senile dementia of Lewy body type (SDLT) and 37 cases with neuropathologically proven Alzheimer's disease (AD) identified a characteristic clinical syndrome in SDLT. Fluctuating cognitive impairment; psychotic features including visual and auditory hallucinations, and paranoid delusions; depressive symptoms; falling and unexplained losses of consciousness were all seen significantly more often than in AD. Over half of the SDLT patients in this series who were given neuroleptics in standard dose showed acute and often irreversible adverse reactions indicative of a neuroleptic sensitivity syndrome. The survival time of drug treated patients was reduced by 50%. Operational criteria to aid in the clinical distinction between SDLT and AD patients are proposed and hypotheses regarding possible aetiology and treatment discussed.

Pierre Ambroise-Thomas: a loyal friend and a strong supporter of tropical medicine in Brazil.

Science.gov (United States)

Daniel-Ribeiro, Cláudio Tadeu

2016-01-01

Our colleagues at the Sociedade Brasileira de Medicina Tropical have been informed of the demise of Professor Pierre Ambroise-Thomas (1937-2014). However, considering that the tribute we paid to him in 2015 - at the 20th anniversary of the Seminário Laveran & Deane sobre Malária - is equally true today, it is worth sharing it with the readers of the RSBMT, in recognition of his many virtues. Pierre Ambroise-Thomas (MD in 1963 and DSc in 1969) was Honorary Professor of Parasitology and Tropical Medicine at the Faculté de Médecine de Grenoble (France), Honorary President of the Académie Nationale de Médecine, member of the Académie Nationale de Pharmacie and Officier dans l'Ordre de La Légion d'Honneur. In addition to his important contributions to tropical medicine and parasitology, working in France during his long and productive career (50 years and 300 publications), Ambroise-Thomas became an admirer and supporter of Brazilian activities related to research, teaching and information in Tropical Medicine.

Pierre Ambroise-Thomas: a loyal friend and a strong supporter of tropical medicine in Brazil

Directory of Open Access Journals (Sweden)

Cláudio Tadeu Daniel-Ribeiro

Full Text Available Abstract: Our colleagues at the Sociedade Brasileira de Medicina Tropical have been informed of the demise of Professor Pierre Ambroise-Thomas (1937-2014. However, considering that the tribute we paid to him in 2015 - at the 20th anniversary of the Seminário Laveran & Deane sobre Malária - is equally true today, it is worth sharing it with the readers of the RSBMT, in recognition of his many virtues. Pierre Ambroise-Thomas (MD in 1963 and DSc in 1969 was Honorary Professor of Parasitology and Tropical Medicine at the Faculté de Médecine de Grenoble (France, Honorary President of the Académie Nationale de Médecine, member of the Académie Nationale de Pharmacie and Officier dans l'Ordre de La Légion d'Honneur. In addition to his important contributions to tropical medicine and parasitology, working in France during his long and productive career (50 years and 300 publications, Ambroise-Thomas became an admirer and supporter of Brazilian activities related to research, teaching and information in Tropical Medicine.

Ablative Material Testing at Lewis Rocket Lab

Science.gov (United States)

1997-01-01

The increasing demand for a low-cost, reliable way to launch commercial payloads to low- Earth orbit has led to the need for inexpensive, expendable propulsion systems for new launch vehicles. This, in turn, has renewed interest in less complex, uncooled rocket engines that have combustion chambers and exhaust nozzles fabricated from ablative materials. A number of aerospace propulsion system manufacturers have utilized NASA Lewis Research Center's test facilities with a high degree of success to evaluate candidate materials for application to new propulsion devices.

A Possible Source For Sir Thomas More’s ‘Mountainish Inhumanity’

NARCIS (Netherlands)

Steenbergh, Kristine

2017-01-01

Shakespeare’s authorship of a scene in Sir Thomas More has been established as highly probable on the basis of an analysis of the handwriting, vocabulary, and collocations stylistics. His addition to the play was long believed to have been written soon after publication of the original play, in

Alimento vivo como alternativa en la dieta de larvas y juveniles de Pterophyllum scalare (Lichtenstein, 1823

Directory of Open Access Journals (Sweden)

J. Luna-Figueroa

2010-01-01

Full Text Available La nutrición en los estadios iniciales de los peces constituye uno de los principales problemas de cultivo, debido a que es la etapa en la que se presenta la mayor mortalidad. En el presente estudio se evaluó, como alternativa en la alimentación de larvas y juveniles de Pterophyllum scalare, el efecto de tres alimentos vivos (Moina wierzejski, Artemia franciscana y Panagrellus redivivus y un alimento comercial (Aquarian Tropical Flakes sobre la tasa específica de crecimiento (TEC y la sobrevivencia. La TEC de larvas resultó más alta con nauplios de A. franciscana (17.57 ± 0.39a% peso corporal ganado mg/ día, seguida de M. wierzejski (16.63 ± 0.41b, P. redivivus (14.25 ± 0.42c y del alimento comercial (13.20 ± 0.42d (P<0.05. En los juveniles, la TEC fue mayor con M. wierzejski (6.28 ± 0.21a% peso corporal ganado mg/día, seguida de A. franciscana (6.04 ± 0.23b, P. redivivus (4.86 ± 0.23c y del alimento comercial (4.39 ± 0.23d (P<0.05. La sobrevivencia de las larvas fue 80.00 ± 10.00a% con A. franciscana y M. wierzejski, mayor 25 y 40.62% con respecto a P. redivivus (60.00 ± 10.00b% y al alimento comercial (45.00 ± 10.00b% (P<0.05. En los juveniles, la sobrevivencia del 100% no difirió con ningún alimento. Finalmente, los nauplios de Artemia en la etapa larval y la Moina en juveniles estimularon favorablemente la TEC y la sobrevivencia de P. scalare.

Thomas Willis: the faculties and his two cognitive frameworks.

Science.gov (United States)

McNabb, Jody

2014-11-01

Thomas Willis' 1664 study The anatomy of the brain is widely regarded as one of the first clinical studies of the brain. In Theanatomy, Thomas Willis explicitly connected the cognitive faculties and the nerves. Willis' later, 1672 work, The two discourses concerning the soul of brutes, severely undermined the materialism of Willis' first study: he affirmed dualism and cognitive immateriality; changed the anatomical locations of cognition; and reasserted a division between the rational and sensitive souls. His exact motive to return to orthodoxy is unclear, but contemporary scholarship of Willis has compounded the confusion with by relying predominantly on The soul of brutes instead of The anatomy. We trace Willis' career and examine his methodological practices, which help explain the historical practices and pressures. A closer examination of Willis' Anatomy of the brain reveals a much more materialistic account of the brain, the faculties, and nervous system. In this article, we present our own analysis of Willis' concept of rationality in the Anatomy and explain its importance for nervous physiology and understanding the analytic techniques for first defining faculty localizations. We then explain the role of the imagination and the immortal soul in the rearticulated anatomical concepts from The soulof brutes. Copyright © 2014 Elsevier Inc. All rights reserved.

Porter-Thomas distribution in unstable many-body systems

International Nuclear Information System (INIS)

Volya, Alexander

2011-01-01

We use the continuum shell model approach to explore the resonance width distribution in unstable many-body systems. The single-particle nature of a decay, the few-body character of the interaction Hamiltonian, and the collectivity that emerges in nonstationary systems due to the coupling to the continuum of reaction states are discussed. Correlations between the structures of the parent and daughter nuclear systems in the common Fock space are found to result in deviations of decay width statistics from the Porter-Thomas distribution.

Elk Monitoring Protocol for Lewis and Clark National Historical Park, Version 1.0

Science.gov (United States)

Jenkins, Kurt J.; Griffin, Paul C.; Boetsch, John R.; Cole, Carla

2011-01-01

Maintaining elk (Cervus elaphus roosevelti) herds that frequent Lewis and Clark National Historical Park (NHP) is central to the park’s purpose of preserving the historic, cultural, scenic, and natural resources. Elk were critical to sustaining the members of the Lewis and Clark expedition by providing food and clothing over the winter of 1805-1806. Today, elk viewing opportunities in the park and surrounding region generate broad appeal with the visiting public, which number over 250,000 per year at the Fort Clatsop visitor center. This protocol describes procedures for monitoring trends in the use of the Fort Clatsop area by Roosevelt elk. Specific objectives of elk monitoring in Lewis and Clark NHP are to measure the relative use and proportion of area used by elk during winter in the Fort Clatsop Unit of the park, and the rate at which elk are sighted from roads in and around the park. Relative use and the proportion of area used by elk are determined from elk fecal pellet surveys conducted every other year in the Fort Clatsop park unit. Pairs of observers visit a systematic array of permanent plots in the fall to clear them of elk fecal pellets, and return to the plots in late winter to count elk fecal pellets that have accumulated during winter. Half of the subplots are counted by two independent observers, which allows for the estimation of relative use and proportion of area occupied by elk with analyses of detection biases that account for unseen elk pellet groups. Standardized road surveys are conducted in and near the Fort Clatsop park unit three or four times monthly during alternate months. Data from road surveys are used to quantify the rate that park visitors would be expected to see elk, when driving the selected set of routes. The monitoring protocol is based on three field seasons of development and testing. The protocol narrative describes the background, rationale, sampling design, field methods, analytical methods, data management, reporting

The Brainstem Pathologies of Parkinson's Disease and Dementia with Lewy Bodies

NARCIS (Netherlands)

Seidel, Kay; Mahlke, Josefine; Siswanto, Sonny; Krueger, Reijko; Heinsen, Helmut; Auburger, Georg; Bouzrou, Mohamed; Grinberg, Lea T.; Wicht, Helmut; Korf, Horst-Werner; den Dunnen, Wilfred; Rueb, Udo

Parkinson's disease (PD) and dementia with Lewy bodies (DLB) are among the human synucleinopathies, which show alpha-synuclein immunoreactive neuronal and/or glial aggregations and progressive neuronal loss in selected brain regions (eg, substantia nigra, ventral tegmental area, pedunculopontine

Quasi-four-body treatment of charge transfer in the collision of protons with atomic helium: I. Thomas related mechanisms

Science.gov (United States)

Safarzade, Zohre; Fathi, Reza; Shojaei Akbarabadi, Farideh; Bolorizadeh, Mohammad A.

2018-04-01

The scattering of a completely bare ion by atoms larger than hydrogen is at least a four-body interaction, and the charge transfer channel involves a two-step process. Amongst the two-step interactions of the high-velocity single charge transfer in an anion-atom collision, there is one whose amplitude demonstrates a peak in the angular distribution of the cross sections. This peak, the so-called Thomas peak, was predicted by Thomas in a two-step interaction, classically, which could also be described through three-body quantum mechanical models. This work discusses a four-body quantum treatment of the charge transfer in ion-atom collisions, where two-step interactions illustrating a Thomas peak are emphasized. In addition, the Pauli exclusion principle is taken into account for the initial and final states as well as the operators. It will be demonstrated that there is a momentum condition for each two-step interaction to occur in a single charge transfer channel, where new classical interactions lead to the Thomas mechanism.

Sobre o desejo em Thomas Hobbes

Directory of Open Access Journals (Sweden)

Fernando Rodrigues Montes D'Oca

2011-01-01

Full Text Available O objetivo deste artigo é explicar o papel do desejo na filosofia política do filósofo inglês Thomas Hobbes. Para tanto, o presente estudo propõe-se apresentar: i. a razão por que Hobbes reivindica o desejo à política, i.a tratando da teoria da conservação do movimento, de Galileu Galilei, e i.b da felicidade como um sucesso contínuo na obtenção dos objetos de desejo; e ii. o papel do desejo no estado de natureza, já que este é determinante tanto para ii.a a entrada do homem no estado de guerra quanto ii.b para a saída deste estado.

Thomas Alva Edison (170th Anniversary of His Birth)

OpenAIRE

V. P. Samokhin; E A. Tikhomirovа

2017-01-01

A brief overview of the major technical achievements of Thomas Edison, an outstanding American inventor, author of more than 1,000 US patents and several thousand patents in other countries, honorary academician of the USSR. Presents biographical information and details of the formation of Edison, his work as a telegrapher, organizing the world's first industrial research laboratory for the continuous development of technological innovations, as well as some interesting facts about his life a...

Surface functionalization of two-dimensional metal chalcogenides by Lewis acid-base chemistry

Science.gov (United States)

Lei, Sidong; Wang, Xifan; Li, Bo; Kang, Jiahao; He, Yongmin; George, Antony; Ge, Liehui; Gong, Yongji; Dong, Pei; Jin, Zehua; Brunetto, Gustavo; Chen, Weibing; Lin, Zuan-Tao; Baines, Robert; Galvão, Douglas S.; Lou, Jun; Barrera, Enrique; Banerjee, Kaustav; Vajtai, Robert; Ajayan, Pulickel

2016-05-01

Precise control of the electronic surface states of two-dimensional (2D) materials could improve their versatility and widen their applicability in electronics and sensing. To this end, chemical surface functionalization has been used to adjust the electronic properties of 2D materials. So far, however, chemical functionalization has relied on lattice defects and physisorption methods that inevitably modify the topological characteristics of the atomic layers. Here we make use of the lone pair electrons found in most of 2D metal chalcogenides and report a functionalization method via a Lewis acid-base reaction that does not alter the host structure. Atomic layers of n-type InSe react with Ti4+ to form planar p-type [Ti4+n(InSe)] coordination complexes. Using this strategy, we fabricate planar p-n junctions on 2D InSe with improved rectification and photovoltaic properties, without requiring heterostructure growth procedures or device fabrication processes. We also show that this functionalization approach works with other Lewis acids (such as B3+, Al3+ and Sn4+) and can be applied to other 2D materials (for example MoS2, MoSe2). Finally, we show that it is possible to use Lewis acid-base chemistry as a bridge to connect molecules to 2D atomic layers and fabricate a proof-of-principle dye-sensitized photosensing device.

Thomas N Bonner (1923-2003), medical historian.

Science.gov (United States)

Bickel, Marcel H

2016-05-01

Thomas Bonner made a long academic career, teaching medical history and higher education at several American universities and presiding over three of these. He engaged in politics for 2 years. As a historian of medicine, he published important books on topics including Midwestern medicine, medical education in the United States and in European countries, the entry of women into medicine in the 19th century and on the educator Abraham Flexner. His works were based on exhaustive research, penetrating analysis, language skills and the ability to explain complex information in understandable terms. Bonner lived a passionate life of commitment and devotion to various worthwhile causes. © The Author(s) 2014.

Vasoprotective effects of life span-extending peripubertal GH replacement in Lewis dwarf rats.

Science.gov (United States)

Ungvari, Zoltan; Gautam, Tripti; Koncz, Peter; Henthorn, Jim C; Pinto, John T; Ballabh, Praveen; Yan, Han; Mitschelen, Matthew; Farley, Julie; Sonntag, William E; Csiszar, Anna

2010-11-01

In humans, growth hormone deficiency (GHD) and low circulating levels of insulin-like growth factor 1 (IGF-1) significantly increase the risk for cerebrovascular disease. Genetic growth hormone (GH)/IGF-1 deficiency in Lewis dwarf rats significantly increases the incidence of late-life strokes, similar to the effects of GHD in elderly humans. Peripubertal treatment of Lewis dwarf rats with GH delays the occurrence of late-life stroke, which results in a significant extension of life span. The present study was designed to characterize the vascular effects of life span-extending peripubertal GH replacement in Lewis dwarf rats. Here, we report, based on measurements of dihydroethidium fluorescence, tissue isoprostane, GSH, and ascorbate content, that peripubertal GH/IGF-1 deficiency in Lewis dwarf rats increases vascular oxidative stress, which is prevented by GH replacement. Peripubertal GHD did not alter superoxide dismutase or catalase activities in the aorta nor the expression of Cu-Zn-SOD, Mn-SOD, and catalase in the cerebral arteries of dwarf rats. In contrast, cerebrovascular expression of glutathione peroxidase 1 was significantly decreased in dwarf vessels, and this effect was reversed by GH treatment. Peripubertal GHD significantly decreases expression of the Nrf2 target genes NQO1 and GCLC in the cerebral arteries, whereas it does not affect expression and activity of endothelial nitric oxide synthase and vascular expression of IGF-1, IGF-binding proteins, and inflammatory markers (tumor necrosis factor alpha, interluekin-6, interluekin-1β, inducible nitric oxide synthase, intercellular adhesion molecule 1, and monocyte chemotactic protein-1). In conclusion, peripubertal GH/IGF-1 deficiency confers pro-oxidative cellular effects, which likely promote an adverse functional and structural phenotype in the vasculature, and results in accelerated vascular impairments later in life.

Shell model test of the Porter-Thomas distribution

International Nuclear Information System (INIS)

Grimes, S.M.; Bloom, S.D.

1981-01-01

Eigenvectors have been calculated for the A=18, 19, 20, 21, and 26 nuclei in an sd shell basis. The decomposition of these states into their shell model components shows, in agreement with other recent work, that this distribution is not a single Gaussian. We find that the largest amplitudes are distributed approximately in a Gaussian fashion. Thus, many experimental measurements should be consistent with the Porter-Thomas predictions. We argue that the non-Gaussian form of the complete distribution can be simply related to the structure of the Hamiltonian

Warm ''pasta'' phase in the Thomas-Fermi approximation

International Nuclear Information System (INIS)

Avancini, Sidney S.; Menezes, Debora P.; Chiacchiera, Silvia; Providencia, Constanca

2010-01-01

In the present article, the 'pasta' phase is studied at finite temperatures within a Thomas-Fermi (TF) approach. Relativistic mean-field models, both with constant and density-dependent couplings, are used to describe this frustrated system. We compare the present results with previous ones obtained within a phase-coexistence description and conclude that the TF approximation gives rise to a richer inner ''pasta'' phase structure and the homogeneous matter appears at higher densities. Finally, the transition density calculated within TF is compared with the results for this quantity obtained with other methods.

Lewis base activation of Lewis acids: catalytic, enantioselective addition of glycolate-derived silyl ketene acetals to aldehydes.

Science.gov (United States)

Denmark, Scott E; Chung, Won-Jin

2008-06-20

A catalytic system involving silicon tetrachloride and a chiral, Lewis basic bisphosphoramide catalyst is effective for the addition of glycolate-derived silyl ketene acetals to aldehydes. It was found that the sense of diastereoselectivity could be modulated by changing the size of the substituents on the silyl ketene acetals. In general, the trimethylsilyl ketene acetals derived from methyl glycolates with a large protecting group on the alpha-oxygen provide enantiomerically enriched alpha,beta-dihydroxy esters with high syn-diastereoselectivity, whereas the tert-butyldimethylsilyl ketene acetals derived from bulky esters of alpha-methoxyacetic acid provide enantiomerically enriched alpha,beta-dihydroxy esters with high anti-diastereoselecitvity.

Random forest to differentiate dementia with Lewy bodies from Alzheimer's disease

NARCIS (Netherlands)

Dauwan, Meenakshi; van der Zande, Jessica J.; van Dellen, Edwin; Sommer, Iris E C; Scheltens, Philip; Lemstra, Afina W.; Stam, Cornelis J.

2016-01-01

Introduction The aim of this study was to build a random forest classifier to improve the diagnostic accuracy in differentiating dementia with Lewy bodies (DLB) from Alzheimer's disease (AD) and to quantify the relevance of multimodal diagnostic measures, with a focus on electroencephalography

Thomas Berdmore, dentist of His Majesty, George III, and dental calculus.

Science.gov (United States)

Andreana, S; Andreana, G; Gonzalez, Y M; Ciancio, S

1996-11-01

Thomas Berdmore's book, Disorders of Deformities of the Teeth and Gums, presents examples of early concepts of preventive dentistry and treatment of periodontal diseases. Various aspects of dental calculus formation and composition are analyzed. Also the effects of periodontal disease as seen by Berdmore are discussed, and ways of treatment in 1770 summarized.

2005 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Lewis County

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Terrapoint collected Light Detection and Ranging (LiDAR) data for the Lewis County project of 2005. The project site covered approximately 223 square miles, divided...

Controlled synthesis of multi-morphology Te crystals by a convenient Lewis acid/base-assisted solvothermal method

International Nuclear Information System (INIS)

Wu Xiaoping; Yuan Lin; Zhou Shaomin; Lou Shiyun; Wang Yongqiang; Gao Tao; Liu YuBiao; Shi Xiaojing

2012-01-01

This paper reports on the controlled growth of multi-morphology Te crystals by a convenient Lewis acid/base-assisted solvothermal method for the first time. The morphological transformation from one-dimension (1D) nanostructures to 2D hierarchical flowerlike microarchitecture has been observed. The nanorods and nanowires with a well-defined crystallographical structure and the hierarchical flowers microarchitecture were obtained by changing the Lewis acids/bases. Lewis acids/bases were found to be crucial for the formation of the products by not only acting as the pH regulator but also as the shape controller, owing to their hydrolysis in the solvent to in situ form H + /OH − and hydrates. The results suggest that this should be an effective approach to the control the growth of t-Te crystals with interesting multiple morphologies, which are of interest for both theoretical investigations and practical applications.

Composition, texture and methane potential of cellulosic residues from Lewis acids organosolv pulping of wheat straw.

Science.gov (United States)

Constant, Sandra; Barakat, Abdellatif; Robitzer, Mike; Di Renzo, Francesco; Dumas, Claire; Quignard, Françoise

2016-09-01

Cellulosic pulps have been successfully isolated from wheat straw through a Lewis acids organosolv treatment. The use of Lewis acids with different hardness produced pulps with different delignification degrees. The cellulosic residue was characterised by chemical composition, X-ray diffraction, FT-IR spectroscopy, N2 physisorption, scanning electron microscopy and potential for anaerobic digestibility. Surface area and pore volume increased with the hardness of the Lewis acid, in correspondence with the decrease of the amount of lignin and hemicellulose in the pulp. The non linearity of the correlation between porosity and composition suggests that an agglomeration of cellulose fibrils occurs in the early stages of pulping. All organosolv pulps presented a significantly higher methane potential than the parent straw. A methane evolution of 295Ncm(3)/g OM was reached by a moderate improvement of the accessibility of the native straw. Copyright © 2016 Elsevier Ltd. All rights reserved.

Thomas Docherty. Culture and a New Experience of Democracy

Directory of Open Access Journals (Sweden)

Erik S. RORABACK

2006-10-01

Full Text Available Thomas Docherty’s freshly printed volume from Stanford University Press, Aesthetic Democracy, is requisite reading for all those thinking beings out there interested in the question of the inter-relation and even inter-articulation between culture and experience for a possible new encounter with the political that would inch toward a truer form of democracy for our current postmodern social spheres and spaces. Professor of English and Comparative Literature in the University of Warwick, long ...

Thomas Aquinas on the Soul: Old problems, New Solutions. Guiding Premises for a Thomistic Synthesis

Directory of Open Access Journals (Sweden)

Yevgeniy Shilov

2012-12-01

Full Text Available This article examines two main approaches to the doctrine of the soul: that of Plato and that of Aristotle. Each of these approaches had its own development and its own interpretations. Plato and his school was more important during the Middle Ages. Through the neo-platonic philosophers it reached Saint Augustine and became a part of the western cultural and religious heritage until finally it was taken up by member of the Franciscan order - Roger Bacon and Bonaventure. But this paradigm could not solve a host of problems connected with the soul and many of them remained unresolved. The end of the twelfth century brought the growth of the universities and the teaching of Aristotle - a new paradigm - transmitted by the Arabic philosophers which was rediscovered by the West. Two commentators on Aristotle - Averroes and Avicenna -were the most important for the West, especially since Avicenna exerted a great influence on Albert the Great. But both Plato and Aristotle, when taken separately, proved to be quite useless in resolving certain problems. But Thomas Aquinas was able to splice the Gordian knot concealing a solution to the problem of the soul. By combining the psychology of Plato with the metaphysics of Aristotle, Thomas succeeded in creating a new concept of the human person. The author of this article has tried to explain the difficulties which faced Thomas and the way in which Thomas was able to resolve a problem which had troubled philosophy through the ages - the problem of reconciling Plato with Aristotle and finding a way to make their conflicting philosophies agree with each other

TUZ, Resonance Integrals in Unresolved Region, Various Temperature, From Porter-Thomas Distribution

International Nuclear Information System (INIS)

Kuncir, G.F.

1969-01-01

1 - Nature of physical problem solved: TUZ computes resonance integrals for a wide variety of temperatures, compositions, and geometries for the unresolved resonances. 2 - Method of solution: The resonances are considered to be defined by an average over the Porter-Thomas distribution of neutron widths

Backscatter 0.5m TIFF Mosaic of St. Thomas, US Virgin Islands, 2004

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a 0.5 meter resolution backscatter mosaic of the south shore of St. Thomas, US Virgin Islands. NOAA's NOS/NCCOS/CCMA Biogeography Team and...

Stereodivergent Mannich reaction of bis(trimethylsilyl)ketene acetals with N-tert-butanesulfinyl imines by Lewis acid or Lewis base activation, a one-pot protocol to obtain chiral β-amino acids.

Science.gov (United States)

Cantú-Reyes, Margarita; Alvarado-Beltrán, Isabel; Ballinas-Indilí, Ricardo; Álvarez-Toledano, Cecilio; Hernández-Rodríguez, Marcos

2017-09-20

We report a one-pot synthesis of chiral β 2,2,3 -amino acids by the Mannich addition of bistrimethylsilyl ketene acetals to N-tert-butanesulfinyl imines followed by the removal of the chiral auxiliary. The synthesis and isolation of pure β-amino acid hydrochlorides were conducted under mild conditions, without strong bases and this method is operationally simple. The stereoselective reaction was promoted by two different activation methods that lead to different stereoisomers: (1) Lewis Acid (LA) catalysis with boron trifluoride diethyl etherate and (2) Lewis Base (LB) catalysis with tetrabutylammonium difluorotriphenylsilicate. The reaction presented good diastereoselectivity with LB activation and moderate to good dr with LA catalysis. The exceptions in both protocols were imines with electron donating groups in the aromatic ring.

Thomas Hardy's Victorian Gothic: Reassessing Hardy's Fiction and His Gothic Sensibility.

Science.gov (United States)

Goldstein, Norma Walrath

Proposing that Thomas Hardy's fiction exhibits strong Gothic sensibilities which offer insight into his artistic vision and add to the power of his fiction, creating a new form of the Gothic, a Victorian Gothic, this dissertation reassesses the Gothic strains in Hardy's fiction. The dissertation is in eight chapters: (1) Introduction to Hardy's…

Parallel Directionally Split Solver Based on Reformulation of Pipelined Thomas Algorithm

Science.gov (United States)

Povitsky, A.

1998-01-01

In this research an efficient parallel algorithm for 3-D directionally split problems is developed. The proposed algorithm is based on a reformulated version of the pipelined Thomas algorithm that starts the backward step computations immediately after the completion of the forward step computations for the first portion of lines This algorithm has data available for other computational tasks while processors are idle from the Thomas algorithm. The proposed 3-D directionally split solver is based on the static scheduling of processors where local and non-local, data-dependent and data-independent computations are scheduled while processors are idle. A theoretical model of parallelization efficiency is used to define optimal parameters of the algorithm, to show an asymptotic parallelization penalty and to obtain an optimal cover of a global domain with subdomains. It is shown by computational experiments and by the theoretical model that the proposed algorithm reduces the parallelization penalty about two times over the basic algorithm for the range of the number of processors (subdomains) considered and the number of grid nodes per subdomain.

Rousseau and the Fable: Rethinking the Fabulous Nature of Educational Philosophy

Science.gov (United States)

Lewis, Tyson E.

2012-01-01

In this essay Tyson Lewis reevaluates Jean-Jacques Rousseau's assessment of the pedagogical value of fables in Emile's education using Giorgio Agamben's theory of poetic production and Thomas Keenan's theory of the inherent ambiguity of the fable. From this perspective, the "unreadable" nature of the fable that Rousseau exposed is not simply the…

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Indian Academy of Sciences (India)

indirect fashion - by providing the cell with energy and in turn using some of the cell's nutrients. With such analogies, Lewis Thomas goes on to describe various facets of life. In two especially fascinating essays on the development of languages ('Social Talk', and. 'Information'), he says that 'language, once it comes alive ...

Lewis Acid Assisted Nitrate Reduction with Biomimetic Molybdenum Oxotransferase Complex.

Science.gov (United States)

Elrod, Lee Taylor; Kim, Eunsuk

2018-03-05

The reduction of nitrate (NO 3 - ) to nitrite (NO 2 - ) is of significant biological and environmental importance. While Mo IV (O) and Mo VI (O) 2 complexes that mimic the active site structure of nitrate reducing enzymes are prevalent, few of these model complexes can reduce nitrate to nitrite through oxygen atom transfer (OAT) chemistry. We present a novel strategy to induce nitrate reduction chemistry of a previously known catalyst Mo IV (O)(SN) 2 (2), where SN = bis(4- tert-butylphenyl)-2-pyridylmethanethiolate, that is otherwise incapable of achieving OAT with nitrate. Addition of nitrate with the Lewis acid Sc(OTf) 3 (OTf = trifluoromethanesulfonate) to 2 results in an immediate and clean conversion of 2 to Mo VI (O) 2 (SN) 2 (1). The Lewis acid additive further reacts with the OAT product, nitrite, to form N 2 O and O 2 . This work highlights the ability of Sc 3+ additives to expand the reactivity scope of an existing Mo IV (O) complex together with which Sc 3+ can convert nitrate to stable gaseous molecules.

Molecular Imaging and Updated Diagnostic Criteria in Lewy Body Dementias.

Science.gov (United States)

Bohnen, Nicolaas I; Müller, Martijn L T M; Frey, Kirk A

2017-08-14

The aims of the study were to review recent advances in molecular imaging in the Lewy body dementias (LBD) and determine if these may support the clinical but contested temporal profile distinction between Parkinson disease (PD) with dementia (PDD) versus dementia with Lewy bodies (DLB). There do not appear to be major regional cerebral metabolic or neurotransmitter distinctions between PDD and DLB. However, recent studies highlight the relative discriminating roles of Alzheimer proteinopathies. PDD patients have lower cortical β-amyloid deposition than DLB. Preliminary tau PET studies suggest a gradient of increasing tau binding from cognitively normal PD (absent to lowest) to cognitively impaired PD (low) to DLB (intermediate) to Alzheimer disease (AD; highest). However, tau binding in DLB, including the medial temporal lobe, is substantially lower than in AD. Alzheimer-type proteinopathies appear to be more common in DLB compared to PDD with relative but no absolute differences. Given the spectrum of overlapping pathologies, future α-synuclein ligands are expected to have the best potential to distinguish the LBD from pure AD.

Investigation of prototypal MOFs consisting of polyhedral cages with accessible Lewis-acid sites for quinoline synthesis.

Science.gov (United States)

Gao, Wen-Yang; Leng, Kunyue; Cash, Lindsay; Chrzanowski, Matthew; Stackhouse, Chavis A; Sun, Yinyong; Ma, Shengqian

2015-03-21

A series of prototypal metal-organic frameworks (MOFs) consisting of polyhedral cages with accessible Lewis-acid sites, have been systematically investigated for Friedländer annulation reaction, a straightforward approach to synthesizing quinoline and its derivatives. Amongst them MMCF-2 demonstrates significantly enhanced catalytic activity compared with the benchmark MOFs, HKUST-1 and MOF-505, as a result of a high-density of accessible Cu(II) Lewis acid sites and large window size in the cuboctahedral cage-based nanoreactor of MMCF-2.

On the Road with Thomas Hart Benton: Images of a Changing America.

Science.gov (United States)

Johnson, Mark M.

1999-01-01

Summarizes the life and work of artist Thomas Hart Benton. Focuses on his paintings of the United States that capture the characteristics of regional life, customs, and nature before modern advancements and urbanization. Provides the itinerary for the 14- venue tour of 77 of Benton's works. (CMK)

St. Thomas and St. John, U.S. Virgin Islands Coastal Digital Elevation Model

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — The 1/3 arc-second St. Thomas and St. John, U.S. Virgin Islands Coastal Digital Elevation Model will be used to support NOAA's tsunami forecast system and for...

National Status and Trends: Bioeffects Program - St. Thomas East End Reserves (STEER) Database

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — The purpose of this effort was to characterize the extent and magnitude of chemical contamination in the St. Thomas East End Reserves or STEER, as part of a larger...

Thomas Merton’s poetics of translation in his letters to writers

Directory of Open Access Journals (Sweden)

Marcela María Raggio

2016-05-01

Full Text Available This article explores Thomas Merton’s poetics of translation as reflected in his letters to writers. There, Merton expresses his ideas on poetic translation, the methods and the experience of approaching foreign literature through translation. Then, a translation analysis of a sample revises the connection between Merton’s poetics and practice of translation.

Mythe en macht. Over de kritische psychiatrie van Thomas S. Szasz

NARCIS (Netherlands)

Pols, Jan

1984-01-01

The aim of this study is to present a review and a critical evaluation of the work of Thomas S. Szasz. First of all the extensive work of Szasz has been studied, resulting in a resumé of his views regarding psychiatry, mental illness, and psychiatrists and their patients. The work of Szasz is to be

Stress and Burden among Caregivers of Patients with Lewy Body Dementia

Science.gov (United States)

Leggett, Amanda N.; Zarit, Steven; Taylor, Angela; Galvin, James E.

2011-01-01

Purpose: Patients with Lewy body dementia (LBD) may present a unique set of symptoms and challenges to family caregivers compared with other types of dementia. Prominent difficulties include motor impairment, activities of daily living (ADLs) disability, recurrent behavioral and emotional problems (BEPs), and diagnostic difficulties. These…

Insights into molecular recognition of LewisX mimics by DC-SIGN using NMR and molecular modelling

International Nuclear Information System (INIS)

Guzzi, C.; Angulo, J.; Rojo, J.; Nieto, P.M.; Doro, F.; Bernardi, A.; Thepaut, M.; Fieschi, F.; Thepaut, M.; Fieschi, F.

2011-01-01

In this work, we have studied in detail the binding of two α-fucosyl-amide-based mimics of Lewis X to DC-SIGN ECD (ECD = extracellular domain) using STD NMR and docking. We have concluded that the binding mode occurs mainly through the fucose moiety, in the same way as Lewis X . Similarly to other mimics containing mannose or fucose previously studied, we have shown that both compounds bind to DC-SIGN ECD in a multimodal fashion. In this case, the main contact is the interaction of two hydroxyl groups one equatorial and the other one axial (O3 and O4) of the fucose with the Ca 2+ as Lewis X and similarly to mannose-containing mimics (in this case the interacting groups are both in the equatorial position). Finally, we have measured the K D of one mimic that was 0.4 mM. Competitive STD NMR experiments indicate that the aromatic moiety provides additional binding contacts that increase the affinity. (authors)

Nom comú i nom propi segons Thomas Hobbes

Directory of Open Access Journals (Sweden)

Josep Moran i Ocerinjauregui

2014-01-01

Full Text Available Thomas Hobbes (1588-1679 tracta el llenguatge humà, i més concretament els noms, des d’un punt de vista filosòfic. Per a Hobbes, els noms són designadors de conceptes: els noms propis designen una sola cosa mentre que els noms comuns en designen diverses. Aquestes idees van ser objecte de reflexió filosòfica i van tenir gran influència en altres filòsofs, com John Stuart Mill.

Losing Thomas & Ella: A Father's Story (A Research Comic).

Science.gov (United States)

Weaver-Hightower, Marcus B

2017-09-01

"Losing Thomas & Ella" presents a research comic about one father's perinatal loss of twins. The comic recounts Paul's experience of the hospital and the babies' deaths, and it details the complex grieving process afterward, including themes of anger, distance, relationship stress, self-blame, religious challenges, and resignation. A methodological appendix explains the process of constructing the comic and provides a rationale for the use of comics-based research for illness, death, and grief among practitioners, policy makers, and the bereaved.

Remediation System Evaluation, Tutu Wellfield Superfund Site, St. Thomas, U.S. Virgin Islands

Science.gov (United States)

The Tutu Wellfield Superfund Site is a 1.5 square mile site located on the eastern end of St. Thomas, U.S. Virgin Islands (USVI) within the upper Turpentine Run surface drainage basin in the Anna’s Retreat area.

Brush Polymer of Donor-Accepter Dyads via Adduct Formation between Lewis Base Polymer Donor and All Carbon Lewis Acid Acceptor

Directory of Open Access Journals (Sweden)

Yang Wang

2017-09-01

Full Text Available A synthetic method that taps into the facile Lewis base (LB→Lewis acid (LA adduct forming reaction between the semiconducting polymeric LB and all carbon LA C60 for the construction of covalently linked donor-acceptor dyads and brush polymer of dyads is reported. The polymeric LB is built on poly(3-hexylthiophene (P3HT macromers containing either an alkyl or vinyl imidazolium end group that can be readily converted into the N-heterocyclic carbene (NHC LB site, while the brush polymer architecture is conveniently constructed via radical polymerization of the macromer P3HT with the vinyl imidazolium chain end. Simply mixing of such donor polymeric LB with C60 rapidly creates linked P3HT-C60 dyads and brush polymer of dyads in which C60 is covalently linked to the NHC junction connecting the vinyl polymer main chain and the brush P3HT side chains. Thermal behaviors, electronic absorption and emission properties of the resulting P3HT-C60 dyads and brush polymer of dyads have been investigated. The results show that a change of the topology of the P3HT-C60 dyad from linear to brush architecture enhances the crystallinity and Tm of the P3HT domain and, along with other findings, they indicate that the brush polymer architecture of donor-acceptor domains provides a promising approach to improve performances of polymer-based solar cells.

Thomas Henry Huxley et la Bible Thomas Henry Huxley and the Bible

Directory of Open Access Journals (Sweden)

Christophe Duvey

2009-10-01

Full Text Available Thomas Henry Huxley devoted several essays to the study of the Bible. This interest can only be accounted for if his ideas on history, religion as well as epistemology are examined. According to him, a struggle between free thought and supernaturalism was culminating during the Victorian era, hence the need for a “New Reformation” which was heir to the ideals of freedom defended by the humanists of the Renaissance. This movement opposed the principles of the supporters of what he called “ecclesiasticism”. The advocates of the “New Reformation” could rely on the progress of modern science, and agnosticism, which Huxley identified with scientific method, became its epistemological foundation. As a result, Huxley thought that the authority of physical science was in conflict with the infallibility of the Scriptures and with the theological arguments which rested on it, and this notably led him to the conclusion that the biblical narrative of the Flood was unhistorical. The naturalisation of the Scriptures seems then logically to follow his philosophical views based on the limits of human knowledge.It appears that it was the question of authority which underlay Huxley’s interest in the Bible. He thought that the authority of the Scriptures must be replaced by that of science.

Argumen Eksistensi Tuhan Dalam Metafisika Ibn Rusyd Dan St. Thomas Aquinas

Directory of Open Access Journals (Sweden)

Wardani Wardani

2015-06-01

Full Text Available Abstract : To establish an argumentation for the existence of God is properly the most crucial as well as complicated effort in the life of religion and faith of human being. There are various approaches and methods have been applicated to reach it by theologians, thinkers, and scientists, including philosophers with their demonstrative-philosophical method. Some arguments which were initiated by Aristotle are ones of the most popular and have been adopted and improved as well by many thinkers and philosophers after him, some arguments which proposed by Ibn Rusyd and St. Thomas Aquinas with some modifications and improvisations are the best examples of it. In the case of elaboration and analysis toward those arguments for the existence of God, this article attempts to compare between metaphysical thought of Ibn Rushd (well-known in the West as Averroës and St. Thomas Aquinas. There is no doubt that both are Aristotelian in their philosophy. Therefore, to seek the similarities and differences, and to analyze the influence of Aristotle on their modes of thought, especially in argumentation for the existence of God, are an urgent point in the way to find more stronger and relevant arguments.Keywords: argument of creation (dalīl al-ikhtirā`, teleological argument (dalīl al-‘ināyah, unmoved mover, prime cause, influence, parallelism.Abstrak : Menggagas argumentasi tentang eksistensi Tuhan sejatinya merupakan upaya yang paling krusial sekaligus pelik dalam kehidupan beragama dan kepercayaan umat manusia. Berbagai pendekatan dan metode telah ditempuh untuk meraihnya oleh para teolog, pemikir, dan ilmuwan, termasuk para filsuf dengan pendekatan dan metode demonstratif-filosofisnya. Argumen-argumen yang diprakarsai oleh Aristoteles adalah diantara yang paling populer dan telah diadopsi serta dikembangkan oleh para pemikir dan filsuf setelahnya, tak terkecuali argumen-argumen yang Ibn Rusyd dan St. Thomas Aquinas kemukakan dengan segenap modifikasi

Dorothy L. Sayers and C. S. Lewis: Christian Postmodernism beyond Boundaries

Science.gov (United States)

Yuasa, Kyoko

2012-01-01

Modern critics do not consider science fiction and mystery novels to be "serious reading", but Dorothy L. Sayers and C. S. Lewis questioned the boundaries between "popular" and "serious" literature. Both Christian writers critically discuss the spiritual crisis of the modern world in each fiction genre. This paper…

75 FR 81998 - Notice of Performance Review Board Membership

Science.gov (United States)

2010-12-29

..., Thomas N. Mr. Leikach, Kalmen I. Mr. Lewis, David H. RDML Ligler, Frances S. Dr. Maguire, Margaret M. Ms... McManamon, James P. RDML McNair, John W. Mr. Meadows, Linda J. Ms. Mitchell, Stephen E. Mr. Montgomery, John..., Office of Civilian Human Resources, telephone 202-685-6341. Dated: December 22, 2010. H.E. Higgins...

Calibration and comparison of the NASA Lewis free-piston Stirling engine model predictions with RE-1000 test data

Science.gov (United States)

Geng, Steven M.

1987-01-01

A free-piston Stirling engine performance code is being upgraded and validated at the NASA Lewis Research Center under an interagency agreement between the Department of Energy's Oak Ridge National Laboratory and NASA Lewis. Many modifications were made to the free-piston code in an attempt to decrease the calibration effort. A procedure was developed that made the code calibration process more systematic. Engine-specific calibration parameters are often used to bring predictions and experimental data into better agreement. The code was calibrated to a matrix of six experimental data points. Predictions of the calibrated free-piston code are compared with RE-1000 free-piston Stirling engine sensitivity test data taken at NASA Lewis. Resonable agreement was obtained between the code predictions and the experimental data over a wide range of engine operating conditions.

Vigencia de algunas de las ideas mercantilistas de Thomas Mun

Directory of Open Access Journals (Sweden)

Emmanuel Borgucci

2011-01-01

Full Text Available Generalmente cuando se aborda el mercantilismo se hace referencia a la acumulación de oro y plata, una balanza de pagos favorable o a la política económica de Jean Colbert. Pero poco se ha hablado del papel y condiciones necesarias del comerciante como agente que hizo posible que los primeros Estados-Nación se convirtieran en las futuras potencias económicas del mundo occidental. Thomas Mun fue uno de aquellos escritores mercantilistas que destacó el papel del comerciante en el auge del sistema mercantilista. El estudio de sus ideas permite concluir que sus recomendaciones acerca de lo que debería ser un comerciante de éxito siguen vigentes hoy en día. La razón de tal afirmación estriba en que sus recomendaciones eran adecuadas en un marco en que se estaba presentando una transformación significativa del sistema de organización comercial con la presencia de la Joint-Stock Company. Independientemente de que muchas de las funciones que Thomas Mun le atribuía al comerciante hoy en día son especializadas, su dominio sigue siendo la clave del éxito de una política comercial que emprenda cualquier nación.

[Thomas Schwencke and Wolfgang Amadeus Mozart].

Science.gov (United States)

Hillen, Harry F P

2010-01-01

Thomas Schwencke (1694-1767) was Professor of Anatomy and Surgery and Lecturer in Obstetrics at the Surgical School in The Hague, the Netherlands. In 1743 he published the very first textbook on haematology. Furthermore, he described his observations on the variolation of smallpox, and published the design of a new obstetric instrument. Schwencke was physician of the city of The Hague and also physician at the court of the princes van Nassau-Weilburg. In 1765 Princess Caroline of Nassau-Weilburg invited the young Wolfgang Amadeus Mozart to perform concerts. During his Dutch tour the young Mozart fell seriously ill, probably from typhoid fever. At the request of the court Mozart was seen for a second opinion and thereafter successfully treated by Schwencke. Mozart could continue his concert tour and Schwencke's reputation as Mozart's physician was established.

The Importance of Peer Review: Thoughts on Knudson, Morrow, and Thomas (2014)

Science.gov (United States)

Fischman, Mark G.

2014-01-01

Knudson, Morrow, and Thomas (2014) recently summarized a number of important issues related to the quality of peer review and current peer-review practice in kinesiology. This writer endorses their six recommendations for improving peer review in kinesiology journals. The purpose of this commentary is to further highlight the importance of…

Thomas L. Griffiths: Award for Distinguished Scientific Early Career Contributions to Psychology

Science.gov (United States)

American Psychologist, 2012

2012-01-01

Presents a short biography of one of the winners of the American Psychological Association's Award for Distinguished Scientific Early Career Contributions to Psychology (2012). Thomas L. Griffiths won the award for bringing mathematical precision to the deepest questions in human learning, reasoning, and concept formation. In his pioneering work,…

Experimental observation of pulsating instability under acoustic field in downward-propagating flames at large Lewis number

KAUST Repository

Yoon, Sung Hwan

2017-10-12

According to previous theory, pulsating propagation in a premixed flame only appears when the reduced Lewis number, β(Le-1), is larger than a critical value (Sivashinsky criterion: 4(1 +3) ≈ 11), where β represents the Zel\\'dovich number (for general premixed flames, β ≈ 10), which requires Lewis number Le > 2.1. However, few experimental observation have been reported because the critical reduced Lewis number for the onset of pulsating instability is beyond what can be reached in experiments. Furthermore, the coupling with the unavoidable hydrodynamic instability limits the observation of pure pulsating instabilities in flames. Here, we describe a novel method to observe the pulsating instability. We utilize a thermoacoustic field caused by interaction between heat release and acoustic pressure fluctuations of the downward-propagating premixed flames in a tube to enhance conductive heat loss at the tube wall and radiative heat loss at the open end of the tube due to extended flame residence time by diminished flame surface area, i.e., flat flame. The thermoacoustic field allowed pure observation of the pulsating motion since the primary acoustic force suppressed the intrinsic hydrodynamic instability resulting from thermal expansion. By employing this method, we have provided new experimental observations of the pulsating instability for premixed flames. The Lewis number (i.e., Le ≈ 1.86) was less than the critical value suggested previously.

Feminine Hypostases in Epic Fantasy: Tolkien, Lewis, Rowling

Directory of Open Access Journals (Sweden)

Măcineanu Laura

2015-12-01

Full Text Available The paper identifies the types of female figures present in the works of three well-known fantasy writers, J.R.R. Tolkien, C.S. Lewis and J.K. Rowling, discussing the ways in which these characters are presented, their relationship with other characters, and their role in the economy of the novel, which is more important than may appear from a first reading. It also tries to explain the reasons that prompted the above-mentioned authors to choose these female hypostases.

Quetiapine effective in treatment of inappropriate sexual behavior of lewy body disease with predominant frontal lobe signs.

Science.gov (United States)

Prakash, Ravi; Pathak, Amit; Munda, Sanjay; Bagati, Dhruv

2009-01-01

Dementia of Lewy body disease is the second most common degenerative cause of dementia after Alzheimer's disease, among all the dementias. The core features are a progressive dementia, fluctuations in cognitive functions, visual hallucinations, and spontaneous parkinsonism. Rapid eye movement sleep behavior disorder, severe neuroleptic sensitivity, and low dopamine transporter uptake in basal ganglia are other suggestive features. Behavioral abnormalities are commonly present in the form of aggressive behavior, irritability, and uninhibited behaviors. These are mostly seen in the advanced stages of dementia. However, inappropriate sexual behavior is uncommonly seen in such cases. Three types of inappropriate sexual behaviors commonly found in cases of dementia are sex talks, sexual acts, and implied sexual acts. Such inappropriate sexual behaviors have not been described adequately in dementia of Lewy body disease. We report inappropriate sexual behaviors in a case of dementia of Lewy body disease, which improved rapidly after treatment with quetiapine.

Logical consistence and operating base in Thomas Hobbes. [Spanish

Directory of Open Access Journals (Sweden)

Rusbel Martínez Rodríguez

2006-01-01

Full Text Available The aim of this paper is to specify the operative elements included in the Thomas Hobbes philosophy substratum. I defend the idea that the logic in the Hobbes philosophy system depends on this substratum. In this paper I use the idea of «operative and thematic concepts» development by Eugen Fink. These concepts are used to show how all of the Hobbes philosophy system has explicit and implicit concepts. Another aim is to concede the importance of understanding the Hobbes philosophy as holistic.

Bibliography of Lewis Research Center Technical Publications announced in 1991

Science.gov (United States)

1992-01-01

This compilation of abstracts describes and indexes the technical reporting that resulted from the scientific engineering work performed and managed by the Lewis Research Center in 1991. All the publications were announced in the 1991 issues of STAR (Scientific and Technical Aerospace Reports) and/or IAA (International Aerospace Abstracts). Included are research reports, journal articles, conference presentations, patents and patent applications, and theses.

Thomas Edison, le magicien de Menlo Park la vie lumineuse d'un inventeur insatiable

CERN Document Server

Reyners, Benjamin; Klein-Scholz, Christelle

2015-01-01

Découvrez enfin tout ce qu'il faut savoir sur Thomas Edison et ses inventions en moins d'une heure ! Inventeur de génie, Thomas Edison est aussi l'un des plus prolifiques de tous les temps. Pourtant, rien ne laissait présager un tel destin... Peu scolarisé, il est d'abord vendeur de journaux à 12 ans, puis télégraphiste à 15, avant de devenir l'un des meilleurs ingénieurs de Wall Street à seulement 22 ans. Il ne cesse dès lors d'accumuler les succès. Doté d'une curiosité insatiable et passionné depuis l'enfance par les expériences en tous genres, il crée coup sur coup les plus grandes inventio

Thomas H. Shepard, M.D., pioneer in embryology and teratology.

Science.gov (United States)

Fantel, Alan G; Polifka, Janine E; Oakley, Godfrey P

2017-06-01

Dr. Thomas H. Shepard died on October 3, 2016 at the age of 93. He was a major figure in the fields of teratology, embryonic and fetal pathology, and pediatrics. He was beloved by his colleagues as he was by the many students and fellows whom he taught, mentored and befriended. His contributions to teratology are extraordinary and he is greatly missed. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

Samuel Thomas Soemmerring (1755-1830): The Naming of Cranial Nerves.

Science.gov (United States)

Pearce, John M S

2017-01-01

Samuel Thomas Soemmerring was a Prussian polymathic doctor with remarkable achievements in anatomy, draftsmanship and inventions. His naming of 12 pairs of cranial nerves in his graduation thesis is of particular importance. He also gave original descriptions of the macula, sensory pathways and of the substantia nigra. His non-medical contributions were diverse and included criticism of the guillotine, invention of a telegraphic system, and discoveries in palaeontology. © 2017 S. Karger AG, Basel.

Terrestrial ages of ordinary chondrites from the lewis cliff stranding area, East Antarctica

Science.gov (United States)

Welten, K. C.; Lindner, L.; Alderliesten, C.; van der Borg, K.

1999-07-01

We determined terrestrial ages of ordinary chondrites from the Lewis Cliff stranding area, East Antarctica, on the basis of the concentrations of cosmogenic 10Be (t1/2 = 1.51 Ma), 26Al (t1/2 = 0.705 Ma) and 36Cl (t1/2 = 0.301 Ma). After an initial 26Al -ray survey of 91 meteorites suggested that many have terrestrial ages larger than 0.1 Ma, we selected 62 meteorites for 10Be and 26Al measurements by accelerator mass spectrometry (AMS) and measured 36Cl in twelve of those. Low terrestrial ages (Ma) were found for about 60% of the meteorites, whereas all others have ages between 0.1 and 0.5 Ma, except for one exceptional age of >2 Ma (Welten et al., 1997). Our major conclusions are: (1) The Lewis Cliff H-chondrites show similar ages as those from the Allan Hills Ice-fields, but the L-chondrites are about a factor of two younger than those from Allan Hills, which indicates that Lewis Cliff is a younger stranding area. (2) The terrestrial age distributions at different parts of the Lewis Cliff stranding area generally agree with simple meteorite concentration models, although differences in weathering rate may also play a role. (3) We confirm that meteorites with natural thermoluminescence (TL) levels >80 krad are associated with low terrestrial ages (Benoit et al., 1992), but conclude that natural TL levels <80 krad can not be used to calculate the terrestrial age of a meteorite. Natural TL levels do seem useful to estimate relative terrestrial ages of large groups of meteorites and to determine differences in surface exposure age of paired meteorite fragments. (4) Of the 62 meteorites measured with AMS, 31 were assigned to eleven different pairing groups, mainly on the basis of their cosmogenic nuclide record. The meteorites are estimated to represent between 42 and 52 distinct falls.

EAARL-B Submerged Topography - Saint Croix and Saint Thomas, U.S. Virgin Islands, 2014

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Binary point-cloud data for part of the submerged environs of Saint Croix and Saint Thomas, U.S. Virgin Islands, were produced from remotely sensed, geographically...

Equations of State of Elements Based on the Generalized Fermi-Thomas Theory

Science.gov (United States)

Feynman, R. P.; Metropolis, N.; Teller, E.

1947-04-28

The Fermi-Thomas model has been used to derive the equation of state of matter at high pressures and at various temperatures. Calculations have been carried out both without and with the exchange terms. Discussion of similarity transformations lead to the virial theorem and to correlation of solutions for different Z-values.

FEMALE SURVIVORS IN THOMAS HARDY‘S THE WITHERED ARM

Directory of Open Access Journals (Sweden)

Yulistiyanti Yulistiyanti

2017-12-01

Full Text Available This article discusses women position in society that Thomas Hardy portrays in his short story entitled The Withered Arm. This short story tells about two female character have closerelationship to the same man. The man comes from upper class. The first woman from lower class has a son of his, but they do not live together. Then, the second one is his new young wife. This short story takes rural area, Dorset as the setting of place where the society has intimate relationships and setting of time is in Victorian era. It applied feminism theory that focuses on male and female positions in society. Beauvoir (1949 considered that the male in French and Western societies defines what it means to be human and what it means to be female. The female becomes subordinate to the male. It applies qualitative analysis method. The text is analyzed relating to the female characters‘ position in society. Their positions make them get discrimination which society created. Thomas Hardy‘s short story will be analyzed on discrimination to female characters. The data shows that the two female characters are oppressed on their conditions. Although they do not get physical harassment, the oppression comes from social injustice that women do not get equal benefit and opportunities. Both of them survive to obtain what they need. These characters use their ways as the survivors because of unfair condition.

Thomas M. Prymak. Gathering a Heritage: Ukrainian, Slavonic, and Ethnic Canada and the USA

Directory of Open Access Journals (Sweden)

Danielle Morrissette

2017-03-01

Full Text Available Book review of Thomas M. Prymak. Gathering a Heritage: Ukrainian, Slavonic, and Ethnic Canada and the USA. U of Toronto P, 2015. xiv, 370 pp. Illustrations. Tables. Appendix. Notes. Index. $29.95, paper.

Reply to comment by Thomas on ''On rainbow scattering in inelastic molecular collisions''

International Nuclear Information System (INIS)

Bowman, J.M.; Lee, K.T.

1981-01-01

The comments of Thomas 1 on the location of rainbows in inelastic molecular scattering of Ref. 2 are discussed and evaluated. It is contended that more insight into the nature of reainbows in rotatinally inelstic collisions is obtained by using the arguments in ref. 2

Borax in the supraglacial moraine of the Lewis Cliff, Buckley Island quadrangle--first Antarctic occurrence

Science.gov (United States)

Fitzpatrick, J.J.; Muhs, D.R.

1989-01-01

During the 1987-1988 austral summer field season, membersof the south party of the antarctic search for meteorites south-ern team* working in the Lewis Cliff/Colbert Hills region dis-covered several areas of unusual mineralization within theLewis Cliff ice tongue and its associated moraine field (figure1). The Lewis Cliff ice tongue (84°15'S 161°25'E) is a meteorite-stranding surface of ablating blue ice, about 2.3 by 7.0 kilo-meters, bounded on the west by the Lewis Cliff, on the northand northeast by a large supraglacial moraine, and on the eastby the Colbert Hills. To the south it opens to the Walcott Névé.Because it is a meteorite-stranding surface, the major component of ice motion in the area is believed to be vertical(Whillans and Cassidy 1983). The presence of Thule-Baffinmoraines at the northern terminus of the blue ice tends tosupport the hypothesis that the area underlying the moraineis essentially stagnant and that ice arriving from the south ispiling up against it. Areas containing mineral deposits werefound within the moraine field to the north and east of theblue ice margin and also along the east margins of the blue iceitself. Subsequent X-ray diffraction analyses of these depositshave shown that they are composed predominantly of nah-colite (NaHCO3), trona [Na3(CO3)(HCO3) · 2H20], borax[Na2B405(OH)4 · 8H20], and a new hexagonal hydrous sulfatespecies. This paper reports the details of the borax occurrence,because it is the first known on the continent.

A Tony Thomas-Inspired Guide to INSPIRE

Energy Technology Data Exchange (ETDEWEB)

O' Connell, Heath B.; /Fermilab

2010-04-01

The SPIRES database was created in the late 1960s to catalogue the high energy physics preprints received by the SLAC Library. In the early 1990s it became the first database on the web and the first website outside of Europe. Although indispensible to the HEP community, its aging software infrastructure is becoming a serious liability. In a joint project involving CERN, DESY, Fermilab and SLAC, a new database, INSPIRE, is being created to replace SPIRES using CERN's modern, open-source Invenio database software. INSPIRE will maintain the content and functionality of SPIRES plus many new features. I describe this evolution from the birth of SPIRES to the current day, noting that the career of Tony Thomas spans this timeline.

A Tony Thomas-Inspired Guide to INSPIRE

International Nuclear Information System (INIS)

O'Connell, Heath B.

2010-01-01

The SPIRES database was created in the late 1960s to catalogue the high energy physics preprints received by the SLAC Library. In the early 1990s it became the first database on the web and the first website outside of Europe. Although indispensible to the HEP community, its aging software infrastructure is becoming a serious liability. In a joint project involving CERN, DESY, Fermilab and SLAC, a new database, INSPIRE, is being created to replace SPIRES using CERN's modern, open-source Invenio database software. INSPIRE will maintain the content and functionality of SPIRES plus many new features. I describe this evolution from the birth of SPIRES to the current day, noting that the career of Tony Thomas spans this timeline.

Tribute to Erwin Felix Lewy-Bertaut; Hommage a Erwin Felix Lewy-Bertaut

Energy Technology Data Exchange (ETDEWEB)

NONE

2006-07-01

Erwin Lewy (alias Felix Bertaut) was born in 1913 in Germany, he emigrated to France where he undertook graduate studies in chemistry. Then, he joined the powder central laboratory where he learnt how to use international tables for structure determination. His thesis work was the X-ray study of the statistical distribution of the size of iron grains. The method Bertaut developed is still a reference in powder granulometry. Bertaut was also interested in the nascent neutron diffraction method and he flew to the United-States to improve his knowledge on this topic. Felix Bertaut created the neutron diffraction laboratory in the atomic research center in Grenoble and later he headed the CNRS' crystallography laboratory till 1982. Felix Bertaut and his laboratories became internationally renowned in crystallography, neutron diffraction and magnetism. He favored the scientific cooperation between France and Germany that led to the creation of the Laue-Langevin Institute (ILL). The ILL became European and was a key partner for building the European Synchrotron Facility (ESRF) in Grenoble. Bertaut was elected as a full member of the French Academy of Sciences in 1979, he died in 2003. (A.C.)

Thomas Piketty’s capitalism revisited

Directory of Open Access Journals (Sweden)

Milovanović Milić

2015-01-01

Full Text Available Thomas Piketty’s international best selling Capital in the Twenty-First Century lays out his theory of a long-run rise in income inequality under capitalism. It is written as a manifesto urging reintegration of social sciences. A number of reviewers judged it on ideological grounds, labeling it either as a revolution in economic thinking, or dismissing it offhandedly. Piketty’s theory of rising inequality is based on the two Fundamental Laws of Capitalism, developed after the Solow growth model. However, this model is inconsistent with Piketty’s own characterization of modern capitalism. Moreover, his sole justification for the constant discrepancy between rate of return and rate of income growth (r > g is based on the high elasticity of substitution between capital and labor. However, that is just one factor that can have an influence on factor income shares. By failing to offer a consistent theory of rising inequality, his piece can hardly be considered as a useful founding stone for a new social science.

The nuclear Thomas-Fermi model

International Nuclear Information System (INIS)

Myers, W.D.; Swiatecki, W.J.

1994-08-01

The statistical Thomas-Fermi model is applied to a comprehensive survey of macroscopic nuclear properties. The model uses a Seyler-Blanchard effective nucleon-nucleon interaction, generalized by the addition of one momentum-dependent and one density-dependent term. The adjustable parameters of the interaction were fitted to shell-corrected masses of 1654 nuclei, to the diffuseness of the nuclear surface and to the measured depths of the optical model potential. With these parameters nuclear sizes are well reproduced, and only relatively minor deviations between measured and calculated fission barriers of 36 nuclei are found. The model determines the principal bulk and surface properties of nuclear matter and provides estimates for the more subtle, Droplet Model, properties. The predicted energy vs density relation for neutron matter is in striking correspondence with the 1981 theoretical estimate of Friedman and Pandharipande. Other extreme situations to which the model is applied are a study of Sn isotopes from 82 Sn to 170 Sn, and the rupture into a bubble configuration of a nucleus (constrained to spherical symmetry) which takes place when Z 2 /A exceeds about 100

Lewis-acid catalyzed depolymerization of Protobind lignin in supercritical water and ethanol

NARCIS (Netherlands)

Guvenatam, Burcu; Heeres, Erik H.J.; Pidko, Evgeny A.; Hensen, Ernie J. M.

2016-01-01

The use of metal acetates, metal chlorides and metal triflates as Lewis acid catalysts for the depolymerization of soda lignin under supercritical conditions was investigated. The reactions were carried out at 400 degrees C in water and ethanol. Lignin conversion in supercritical water led to

David Lewis in the Lab: Experimental Results on the Emergence of Meaning

NARCIS (Netherlands)

Bruner, Justin; O'Connor, Cailin; Rubin, Hannah; Huttegger, S. (Simon)

2014-01-01

In this paper we use an experimental approach to investigate how linguistic conventions can emerge in a society without explicit agreement. As a starting point we consider the signaling game introduced by Lewis (Convention 1969). We find that in experimental settings, small groups can quickly

2009 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Lewis County, Washington

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data for the Lewis County survey area for the Puget Sound LiDAR Consortium. This data...

Catalytic Ozonation of Toluene Using Chilean Natural Zeolite: The Key Role of Brønsted and Lewis Acid Sites

Directory of Open Access Journals (Sweden)

Serguei Alejandro-Martín

2018-05-01

Full Text Available The influence of surface physical-chemical characteristics of Chilean natural zeolite on the catalytic ozonation of toluene is presented in this article. Surface characteristics of natural zeolite were modified by acid treatment with hydrochloric acid and ion-exchange with ammonium sulphate. Prior to catalytic ozonation assays, natural and chemically modified zeolite samples were thermally treated at 623 and 823 K in order to enhance Brønsted and Lewis acid sites formation, respectively. Natural and modified zeolite samples were characterised by N2 adsorption at 77 K, elemental analysis, X-ray fluorescence, and Fourier transform infrared (FTIR spectroscopy, using pyridine as a probe molecule. The highest values of the reaction rate of toluene oxidation were observed when NH4Z1 and 2NH4Z1 zeolite samples were used. Those samples registered the highest density values of Lewis acid sites compared to other samples used here. Results indicate that the presence of strong Lewis acid sites at the 2NH4Z1 zeolite surface causes an increase in the reaction rate of toluene oxidation, confirming the role of Lewis acid sites during the catalytic ozonation of toluene at room temperature. Lewis acid sites decompose gaseous ozone into atomic oxygen, which reacts with the adsorbed toluene at Brønsted acid sites. On the other hand, no significant contribution of Brønsted acid sites on the reaction rate was registered when NH4Z1 and 2NH4Z1 zeolite samples were used.

The «Heterenomy» of Kantian Will. A Comparison with Thomas Aquinas

Directory of Open Access Journals (Sweden)

María Elton

2013-05-01

Full Text Available The Kantian ideal is to establish a rational foundation of morality, accessible to everybody, independently of each own religiuos beliefs or even in absence of these beliefs. However, the Kantian practical reason does not ultimately fulfill this ideal, because the subject must have rational faith in the existence of God in order to promote its object, the supreme good, that is, the union between morality and its proportional happiness. God is the cause of this harmony in the afterlife. The cause of this reason’s «heteronomy» is precisely Kant’s foundation of the autonomy of will. At the bottom of this problem lies the question of how moral law influences man’s desire in order that his reason could be really practical. Thomas Aquinas has this problem resolved thanks to his metaphysical anthropology. According to Thomas, the origin of human acts resides in the agent, who moves himself for an end not only known, but also desired, being thus the owner of his actions with a kind of «personal autonomy»

Applications of density matrix in the fractional quantum mechanics: Thomas-Fermi model and Hohenberg-Kohn theorems revisited

International Nuclear Information System (INIS)

Dong, Jianping

2011-01-01

The many-body space fractional quantum system is studied using the density matrix method. We give the new results of the Thomas-Fermi model, obtain the quantum pressure of the free electron gas. We also show the validity of the Hohenberg-Kohn theorems in the space fractional quantum mechanics and generalize the density functional theory to the fractional quantum mechanics. -- Highlights: → Thomas-Fermi model under the framework of fractional quantum mechanics is studied. → We show the validity of the HK theorems in the space fractional quantum mechanics. → The density functional theory is generalized to the fractional quantum mechanics.

Bibliography of Lewis Research Center technical publications announced in 1990

Science.gov (United States)

1991-01-01

This compilation of abstracts describes and indexes the technical reporting that resulted from the scientific and engineering work performed and managed by the Lewis Research Center in 1990. All the publications were announced in the 1990 issues of STAR (Scientific and Technical Aerospace Reports) and/or IAA (International Aerospace Abstracts). Included are research reports, journal articles, conference presentations, patents and patent applications, and theses.

Bibliography of Lewis Research Center technical publications announced in 1992

Science.gov (United States)

1993-01-01

This compilation of abstracts describes and indexes the technical reporting that resulted from the scientific and engineering work performed and managed by the Lewis Research Center in 1992. All the publications were announced in the 1992 issues of STAR (Scientific and Technical Aerospace Reports) and/or IAA (International Aerospace Abstracts). Included are research reports, journal articles, conference presentations, patents and patent applications, and theses.

Bibliography of Lewis Research Center technical publications announced in 1993

Science.gov (United States)

1994-01-01

This compilation of abstracts describes and indexes the technical reporting that resulted from the scientific and engineering work performed and managed by the Lewis Research Center in 1993. All the publications were announced in the 1993 issues of STAR (Scientific and Technical Aerospace Reports) and/or IAA (International Aerospace Abstracts). Included are research reports, journal articles, conference presentations, patents and patent applications, and theses.

Bibliography of Lewis Research Center technical publications announced in 1989

Science.gov (United States)

1990-01-01

This compilation of abstracts describes and indexes the technical reporting that resulted from the scientific and engineering work performed and managed by the Lewis Research Center in 1989. All the publications were announced in the 1989 issues of STAR (Scientific and Technical Aerospace Reports) and/or IAA (International Aerospace Abstracts). Included are research reports, journal articles, conference presentations, patents and patent applications, and theses.

L-selectin-carbohydrate interactions: relevant modifications of the Lewis x trisaccharide.

Science.gov (United States)

Sanders, W J; Katsumoto, T R; Bertozzi, C R; Rosen, S D; Kiessling, L L

1996-11-26

Protein-carbohydrate interactions are known to mediate cell-cell recognition and adhesion events. Specifically, three carbohydrate binding proteins termed selectins (E-, P-, and L-selectin) have been shown to be essential for leukocyte rolling along the vascular endothelium, the first step in the recruitment of leukocytes from the blood into inflammatory sites or into secondary lymphoid organs. Although this phenomenon is well-established, little is known about the molecular-level interactions on which it depends. All three selectins recognize sulfated and sialylated derivatives of the Lewis x [Le(x):Gal beta 1-->4(Fuc alpha 1-->3)GlcNAc] and Lewis a [Le(a): Gal beta 1-->3(Fuc alpha 1-->4)GlcNAc] trisaccharide cores with affinities in the millimolar range, and it is believed that variants of these structures are the carbohydrate determinants of selectin recognition. Recently it was shown that the mucin GlyCAM-1, a secreted physiological ligand for L-selectin, is capped with sulfated derivatives of sialyl Lewis x [sLe(x): Sia alpha 2-->3Gal beta 1-->4(Fuc alpha 1-->3)GlcNAc] and that sulfation is required for the high-affinity interaction between GlyCAM-1 and L-selectin. To elucidate the important sites of sulfation on Le(x) with respect to L-selectin recognition, we have synthesized six sulfated Le(x) analogs and determined their abilities to block binding of a recombinant L-selectin-Ig chimera to immobilized GlyCAM-1. Our results suggest that 6-sulfo sLe(x) binds to L-selectin with higher affinity than does sLe(x) or 6'-sulfo sLe(x) and that sulfation of sLe(x) capping groups on GlyCAM-1 at the 6-position is important for L-selectin recognition.

Lewis Acid-Base Properties of a Low Carbon Aluminium Killed Steel ...

African Journals Online (AJOL)

An important factor in achieving maximum adhesion of a particular coating system to the substrate lies in the proper preparation of the substrate prior to the application of paint. The Lewis acid-base properties of the outer metal surface play a determinant role in many of these applications, and the chemical reactions involved ...

Exercise for Individuals with Lewy Body Dementia: A Systematic Review.

Directory of Open Access Journals (Sweden)

Michael Inskip

Full Text Available Individuals with Lewy body Dementia (LBD, which encompasses both Parkinson disease dementia (PDD and Dementia with Lewy Bodies (DLB experience functional decline through Parkinsonism and sedentariness exacerbated by motor, psychiatric and cognitive symptoms. Exercise may improve functional outcomes in Parkinson's disease (PD, and Alzheimer's disease (AD. However, the multi-domain nature of the LBD cluster of symptoms (physical, cognitive, psychiatric, autonomic results in vulnerable individuals often being excluded from exercise studies evaluating physical function in PD or cognitive function in dementia to avoid confounding results. This review evaluated existing literature reporting the effects of exercise interventions or physical activity (PA exposure on cluster symptoms in LBD.A high-sensitivity search was executed across 19 databases. Full-length articles of any language and quality, published or unpublished, that analysed effects of isolated exercise/physical activity on indicative Dementia with Lewy Bodies or PD-dementia cohorts were evaluated for outcomes inclusive of physical, cognitive, psychiatric, physiological and quality of life measures. The protocol for this review (Reg. #: CRD42015019002 is accessible at http://www.crd.york.ac.uk/PROSPERO/.111,485 articles were initially retrieved; 288 full articles were reviewed and 89.6% subsequently deemed ineligible due to exclusion of participants with co-existence of dementia and Parkinsonism. Five studies (1 uncontrolled trial, 1 randomized controlled trial and 3 case reports evaluating 16 participants were included. Interventions were diverse and outcome homogeneity was low. Habitual gait speed outcomes were measured in 13 participants and increased (0.18m/s, 95% CI -0.02, 0.38m/s, exceeding moderate important change (0.14m/s for PD cohorts. Other outcomes appeared to improve modestly in most participants.Scarce research investigating exercise in LBD exists. This review confirms

Lewis-acid catalyzed depolymerization of Protobind lignin in supercritical water and ethanol

NARCIS (Netherlands)

Güvenatam, B.; Heeres, E.H.J.; Pidko, E.A.; Hensen, E.J.M.

2014-01-01

The use of metal acetates, metal chlorides and metal triflates as Lewis acid catalysts for the depolymerization of soda lignin under supercritical conditions was investigated. The reactions were carried out at 400°C in water and ethanol. Lignin conversion in supercritical water led to formation of

Many Modernities and Utopia : From Thomas More to South Asian Utopian Writings

NARCIS (Netherlands)

Bagchi, B.

2016-01-01

This chapter sees Utopia as at once a place of dreams, a place of the good, and a place which is nowhere to be found: paradox, ambiguity, and janus-facedness are embedded in a very modern punning coupling of the good, ‘eu’, and the nonexistent, ‘ou’, made by Thomas More in his Greek neologism

Tailoring the Synergistic Bronsted-Lewis acidic effects in Heteropolyacid catalysts: Applied in Esterification and Transesterification Reactions

OpenAIRE

Tao, Meilin; Xue, Lifang; Sun, Zhong; Wang, Shengtian; Wang, Xiaohong; Shi, Junyou

2015-01-01

In order to investigate the influences of Lewis metals on acidic properties and catalytic activities, a series of Keggin heteropolyacid (HPA) catalysts, HnPW11MO39 (M = TiIV, CuII, AlIII, SnIV, FeIII, CrIII, ZrIV and ZnII; for Ti and Zr, the number of oxygen is 40), were prepared and applied in the esterification and transesterification reactions. Only those cations with moderate Lewis acidity had a higher impact. Ti Substituted HPA, H5PW11TiO40, posse lower acid content compared with TixH3−4...

Effect of induced hyperglycemia on metastatic spreading in Lewis lung carcinoma

International Nuclear Information System (INIS)

Shmakova, N.L.; Fomenkova, T.E.; Fadeeva, T.A.

1991-01-01

The effect of induced hyperglycemia on the intensity of metastatic dissemination of Lewis lung carcinoma was investigated in experiments on mice. Neither long-, nor short-term hyperglycemia, induced at different phases of dissemination, influenced the intensity of metastatic spreading, primary tumor growth, the time of appearance of metastases, and the average life duration of tumor-bearing animals

Controlled and Efficient Polymerization of Conjugated Polar Alkenes by Lewis Pairs Based on Sterically Hindered Aryloxide-Substituted Alkylaluminum

Directory of Open Access Journals (Sweden)

Xiaojun Wang

2018-02-01

Full Text Available Reported herein is the development of an effective strategy for controlled and efficient Lewis pair polymerization of conjugated polar alkenes, including methyl methacrylate (MMA, n-butyl methacrylate (nBuMA, and γ-methyl-α-methylene-γ-butyrolactone (γMMBL, by the utilization of sterically encumbered Al(BHT2Me (BHT: 2,6-di-tert-butyl-4-methylphenol as a Lewis acid that shuts down intramolecular backbiting termination. In combination with a selected N-heterocyclic carbene (NHC as a Lewis base, the polymerization of MMA exhibited activity up to 3000 h−1 TOF and an acceptable initiation efficiency of 60.6%, producing polymers with high molecular weight (Mn up to 130 kg/mol and extremely narrow dispersity (Đ = 1.06~1.13. This controlled polymerization with a living characteristic has been evidenced by chain-extension experiments and chain-end analysis, and enabled the synthesis of well-defined diblock copolymers.

Computational Elucidation of a Role That Brønsted Acidification of the Lewis Acid-Bound Water Might Play in the Hydrogenation of Carbonyl Compounds with H2 in Lewis Basic Solvents.

Science.gov (United States)

Heshmat, Mojgan; Privalov, Timofei

2017-08-25

Brønsted acidification of water by Lewis acid (LA) complexation is one of the fundamental principles in chemistry. Using transition-state calculations (TS), herein we investigate the role that Brønsted acidification of the LA-bound water might play in the mechanism of the hydrogenation of carbonyl compounds in Lewis basic solvents under non-anhydrous conditions. The potential energy scans and TS calculations were carried out with a series of eight borane LAs as well as the commonly known strong LA AlCl 3 in 1,4-dioxane or THF as Lewis basic solvents. Our molecular model consists of the dative LA-water adduct with hydrogen bonds to acetone and a solvent molecule plus one additional solvent molecule that participates is the TS structure describing the cleavage of H 2 at acetone's carbonyl carbon atom. In all the molecular models applied here, acetone (O=CMe 2 ) is the archetypical carbonyl substrate. We demonstrate that Brønsted acidification of the LA-bound water can indeed lower the barrier height of the solvent-involving H 2 -cleavage at the acetone's carbonyl carbon atom. This is significant because at present it is believed that the mechanism of the herein considered reaction is described by the same mechanism regardless of whether the reaction conditions are strictly anhydrous or non-anhydrous. Our results offer an alternative to this belief that warrants consideration and further study. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Aspectos biológicos e tabela de vida de Uroleucon ambrosiae (Thomas) em função da temperatura

OpenAIRE

Auad, Alexander Machado; Moraes, Jair Campos de

2003-01-01

The aphid Uroleucon ambrosiae (Thomas) is considered a pest of hidroponically-grown lettuce, but basic and applied information on its control are scarce in Brazil. The aim of this study was to determine the effect of different temperatures on biological aspects and life history of U. ambrosiae (Thomas) developing on hydroponic lettuce (Lactuca sativa L.) crop. Newly emerged nymphs were placed on 4-cm discs of hydroponic lettuce, var. Verônica, which were maintained on 5-cm Petri dishes, at te...

Intermolecular interactions of trifluorohalomethanes with Lewis bases in the gas phase: an ab initio study.

Science.gov (United States)

Wang, Yi-Siang; Yin, Chih-Chien; Chao, Sheng D

2014-10-07

We perform an ab initio computational study of molecular complexes with the general formula CF3X-B that involve one trifluorohalomethane CF3X (X = Cl or Br) and one of a series of Lewis bases B in the gas phase. The Lewis bases are so chosen that they provide a range of electron-donating abilities for comparison. Based on the characteristics of their electron pairs, we consider the Lewis bases with a single n-pair (NH3 and PH3), two n-pairs (H2O and H2S), two n-pairs with an unsaturated bond (H2CO and H2CS), and a single π-pair (C2H4) and two π-pairs (C2H2). The aim is to systematically investigate the influence of the electron pair characteristics and the central atom substitution effects on the geometries and energetics of the formed complexes. The counterpoise-corrected supermolecule MP2 and coupled-cluster single double with perturbative triple [CCSD(T)] levels of theory have been employed, together with a series of basis sets up to aug-cc-pVTZ. The angular and radial configurations, the binding energies, and the electrostatic potentials of the stable complexes have been compared and discussed as the Lewis base varies. For those complexes where halogen bonding plays a significant role, the calculated geometries and energetics are consistent with the σ-hole model. Upon formation of stable complexes, the C-X bond lengths shorten, while the C-X vibrational frequencies increase, thus rendering blueshifting halogen bonds. The central atom substitution usually enlarges the intermolecular bond distances while it reduces the net charge transfers, thus weakening the bond strengths. The analysis based on the σ-hole model is grossly reliable but requires suitable modifications incorporating the central atom substitution effects, in particular, when interaction components other than electrostatic contributions are involved.

Thomas K. Jeffers: pioneer of coccidiosis research.

Science.gov (United States)

Chapman, H D

2012-01-01

Thomas K. Jeffers has made many significant contributions to our understanding of the biology of the parasite Eimeria, the cause of coccidiosis in poultry. His work has had direct practical application for the control of this widespread disease. Topics discussed include Jeffers' pioneering work concerned with genetics of the host response to infection, the nature of biological and immunological intraspecific variation, drug resistance and discovery, field surveys of resistance, and his most recognized achievement-the demonstration that the lifecycle of coccidia may be altered by artificial selection. Parasites so modified are attenuated but retain their immunogenicity, a discovery that has led to the development of live vaccines that are inherently non-pathogenic. This article provides a brief biography and describes the contributions that Jeffers has made to our knowledge of coccidiosis.

An exploratory study of proficient undergraduate Chemistry II students' application of Lewis's model

Science.gov (United States)

Lewis, Sumudu R.

This exploratory study was based on the assumption that proficiency in chemistry must not be determined exclusively on students' declarative and procedural knowledge, but it should be also described as the ability to use variety of reasoning strategies that enrich and diversify procedural methods. The study furthermore assumed that the ability to describe the structure of a molecule using Lewis's model and use it to predict its geometry as well as some of its properties is indicative of proficiency in the essential concepts of covalent bonding and molecule structure. The study therefore inquired into the reasoning methods and procedural techniques of proficient undergraduate Chemistry II students when solving problems, which require them to use Lewis's model. The research design included an original survey, designed by the researcher for this study, and two types of interviews, with students and course instructors. The purpose of the survey was two-fold. First and foremost, the survey provided a base for the student interview selection, and second it served as the foundation for the inquiry into the strategies the student use when solving survey problems. Twenty two students were interviewed over the course of the study. The interview with six instructors allowed to identify expected prior knowledge and skills, which the students should have acquired upon completion of the Chemistry I course. The data, including videos, audios, and photographs of the artifacts produced by students during the interviews, were organized and analyzed manually and using QSR NVivo 10. The research found and described the differences between proficient and non-proficient students' reasoning and procedural strategies when using Lewis's model to describe the structure of a molecule. One of the findings clearly showed that the proficient students used a variety of cues to reason, whereas other students used one memorized cue, or an algorithm, which often led to incorrect representations in

Numerical studies of the g-hartree density functional in the Thomas-Fermi scaling limit

International Nuclear Information System (INIS)

Millack, T.; Weymans, G.

1986-02-01

Methods of finite temperature quantum field theory are used to construct the g-Hartree density functional for atoms. Low and high temperature expansions are discussed in detail. Numerical studies for atomic ground-state configurations are presented in the Thomas-Fermi-Scaling limit. (orig.)

Superconducting microwave electronics at Lewis Research Center

Science.gov (United States)

Warner, Joseph D.; Bhasin, Kul B.; Leonard, Regis F.

Over the last three years, NASA Lewis Research Center has investigated the application of newly discovered high temperature superconductors to microwave electronics. Using thin films of YBa2Cu3O7-delta and Tl2Ca2Ba2Cu3Ox deposited on a variety of substrates, including strontium titanate, lanthanum gallate, lanthanum aluminate and magnesium oxide, a number of microwave circuits have been fabricated and evaluated. These include a cavity resonator at 60 GHz, microstrip resonators at 35 GHz, a superconducting antenna array at 35 GHz, a dielectric resonator at 9 GHz, and a microstrip filter at 5 GHz. Performance of some of these circuits as well as suggestions for other applications are reported.

Superconducting Microwave Electronics at Lewis Research Center

Science.gov (United States)

Warner, Joseph D.; Bhasin, Kul B.; Leonard, Regis F.

1991-01-01

Over the last three years, NASA Lewis Research Center has investigated the application of newly discovered high temperature superconductors to microwave electronics. Using thin films of YBa2Cu3O7-delta and Tl2Ca2Ba2Cu3Ox deposited on a variety of substrates, including strontium titanate, lanthanum gallate, lanthanum aluminate and magnesium oxide, a number of microwave circuits have been fabricated and evaluated. These include a cavity resonator at 60 GHz, microstrip resonators at 35 GHz, a superconducting antenna array at 35 GHz, a dielectric resonator at 9 GHz, and a microstrip filter at 5 GHz. Performance of some of these circuits as well as suggestions for other applications are reported.

Improved thomas formula for radon measurement

International Nuclear Information System (INIS)

Ji Changsong

1991-06-01

The FT 648 type portable absolute radon meter has been developed and the designing principle of this instrument is introduced. The absolute radon meter differs from relative radon meter. By using structure parameters, operating parameters and readout of this instrument, the radon content of measured gas is obtained directly without calibration in advance. Normally, the calibration is done by a standard radioactive gaseous source of which the radon concentration is known. The systematic error is removed by adding filter-efficiency Σ, α self-absorption correction β, energy spectrum correction S, geometric factor Ω of probe and gravity dropping correction factor G to the Thomas formula for radon measurement of two-filter method. The atmosphere radon content, which is given in hour-average, in Beijing area was measured by FT 648 type absolute radon meter. The measurement lasted continuously for several days and nights and a 'saddle shape' of radon content-time curve was observed. The day's average radon content was 8.5 Bq·m -3

Thomas Walter Bannerman Kibble (1932 - 2016)

CERN Document Server

2016-01-01

Tom Kibble, an internationally-renowned theoretical physicist, passed away on Thursday 2 June.   Tom Kibble in the CMS cavern during a visit to CERN in 2014. (Photo: CMS/CERN) Professor Thomas Walter Bannerman Kibble passed away unexpectedly on 2 June at the age of 83. He was senior research investigator at the Blackett Laboratory and Emeritus Professor of Theoretical Physics at Imperial College, London. He made seminal contributions to our current understanding of symmetries and symmetry breaking in the Standard Model of particle physics. He was among those who, in 1964, proposed the mechanism of spontaneous symmetry breaking in gauge theories, together with G. Guralnik and C. Hagen in the autumn of that year, following the papers by R. Brout and F. Englert and by P. Higgs. When this new understanding was incorporated into a model proposed by S. Glashow in 1961, it led to the first formulations of the Standard Model by S. Weinberg and A. Salam. Kibble deepened our under...

SOME ASPECTS OF CONTEMPORARY ATHEISM AND ST. THOMAS AQUINA

Directory of Open Access Journals (Sweden)

CH. MOREROD

2010-10-01

Full Text Available Atheism has become fashionable in the recent years. It has diff erent forms, but in many cases starts from the presupposition that the only rational approach is the one of natural sciences. Believers have the duty to provide some answers to the atheists, also at the philosophical level. St. Thomas Aquinas off ers several arguments that can be explained in contemporary terms: the Universe needs a fi rst cause, which acts also through created causes; our desire for the infi nite is a sign of God; the order of the Universe suggests and organizer

77 FR 6782 - In the Matter of: Kok Tong Lim, a/k/a Thomas Lim Blk 258A Compassvale Road #07-551 Singapore...

Science.gov (United States)

2012-02-09

... Thomas Lim Blk 258A Compassvale Road 07-551 Singapore 541258; Order Denying Export Privileges On October...'') of Singapore, pled guilty to one count of violating the International Emergency Economic Powers Act..., a/k/a Thomas Lim, with the last known address at: Blk 258A,Compassvale Road 07-551, Singapore 541258...

Impact through Images: Exploring Student Understanding of Environmental Science through Integrated Place-Based Lessons in the Elementary Classroom

Science.gov (United States)

Muthersbaugh, Debbie; Kern, Anne L.; Charvoz, Rebecca

2014-01-01

In the early 1800s, the U.S. President Thomas Jefferson assembled a team of explorers led by Meriwether Lewis and William Clark to forge a waterway connecting the Missouri River to the Pacific Ocean. How has this environment changed in 200 years and how do elementary students make sense of those changes? This study looks at the impact of…

The Sixth Great Mass Extinction

Science.gov (United States)

Wagler, Ron

2012-01-01

Five past great mass extinctions have occurred during Earth's history. Humanity is currently in the midst of a sixth, human-induced great mass extinction of plant and animal life (e.g., Alroy 2008; Jackson 2008; Lewis 2006; McDaniel and Borton 2002; Rockstrom et al. 2009; Rohr et al. 2008; Steffen, Crutzen, and McNeill 2007; Thomas et al. 2004;…

NOAA TIFF Graphic- 0.5m Backscatter Mosaic of St. Thomas, US Virgin Islands, 2004

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a 0.5 meter resolution backscatter mosaic of the south shore of St. Thomas, US Virgin Islands.NOAA's NOS/NCCOS/CCMA Biogeography Team and...

Thomas Aquinas on the Beatitudes : Reading Matthew, Disputing Grace and Virtue, Preaching Happiness

NARCIS (Netherlands)

ten Klooster, Anton

2018-01-01

What is happiness and how do we attain it? Saint Thomas Aquinas (ca. 1226-1274) devoted much time to these questions. In studying them he always returned to the beatitudes as they are found in Matthew 5:1-10. They function as the framework for his theology of human happiness. This study presents

The Two Hands of Thomas Aquinas : The Reportationes of the Commentary on Matthew

NARCIS (Netherlands)

ten Klooster, Anton

2014-01-01

The gospel of Matthew is more important to the theology of Thomas Aquinas than most scholars have realised. Access to his commentary on this gospel is impeded by the lack of a critical edition. Moreover, we have only two reportationes of the text. In order to establish the value of these texts, I

Thomas Mann's Death in Venice or Plutarch's way towards Eros

OpenAIRE

Gilabert Barberà, Pau

2010-01-01

In Death in Venice Thomas Mann refers explicitly to Plato's Symposium and Phaedrus in order to explain the relationship between Gustav von Aschenbach and Tadzio but he hides that his novel also depends on Plutarch's Eroticus. Why? The aim of this article is precisely to reveal the different reasons for such an attitude. Indeed, Plutarch speaks highly of conjugal love in his Eroticus and this way is not followed by Mann in Death in Venice but, at the same, the German writer finds in this Pluta...

"German Culture is where I am": Thomas Mann in Exile

OpenAIRE

Helmut Koopmann

1982-01-01

Thomas Mann in exile reacted like many writers expelled from Germany: totally irritated he tried to defend his own identity by claiming that he was still the leading representative of Germany. But about 1938 a process of dissociation from Germany started which led to sharp remarks on Germany in his The Beloved Returns , to his conviction that German culture was where he lived and to the acknowledgement of America as his new home. Traces of his experience of exile, and a late answer on his se...

Bathymetry 1m GRID of St. Thomas, US Virgin Islands, 2004, UTM 20 WGS84

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This dataset contains an ESRI Grid with 1 meter cell size representing the bathymetry of the south shore of St. Thomas, US Virgin Islands. NOAA's NOS/NCCOS/CCMA...

Thomas J. Ahrens (1936-2010)

Science.gov (United States)

Jeanloz, Raymond

2011-03-01

Thomas J. Ahrens, a leader in the study of high-pressure shock wave and planetary impact phenomena, died at his home in Pasadena, Calif., on 24 November 2010 at the age of 74. He was the California Institute of Technology's Fletcher Jones Professor of Geophysics, emeritus since 2005 but professionally active to the end. He had been president of AGU's Tectonophysics section, editor of Journal of Geophysical Research, founding member of both the Mineral and Rock Physics and Study of the Earth's Deep Interior focus groups, and editor—more like key driving force—for AGU's Handbook of Physical Constants. Tom was a pioneer in experimental and numerical studies of the effects of projectiles hitting a target at velocities exceeding the speed of sound (hypervelocity impact), arguably the most important geophysical process in the formation, growth, and, in many cases, surface evolution of planets. As a professor at Caltech, he established the foremost university laboratory for shock wave experiments, where students and research associates from around the world pursued basic research in geophysics, planetary science, and other disciplines. Previously, high-pressure shock experiments were conducted primarily in national laboratories, where they were initially associated with the development of nuclear weapons.

Thomas Edison’s Poetry Machine

Directory of Open Access Journals (Sweden)

Matthew Rubery

2014-04-01

Full Text Available The tradition of spoken-word recording began with Thomas Edison’s invention of the phonograph. Hence, this article makes the case that 1878 is a more important year to the history of literature than has yet been recognized for its experiments with verse and sound-recording technology. Although the tinfoil phonograph’s first decade has been well documented by media historians, literary critics have singled out 1888 as the noteworthy year since that is when Edison’s improved phonograph made it possible to record prominent figures including Alfred Tennyson and Robert Browning. Taking Edison’s original tinfoil phonograph as an alternative starting point reveals how the 1878 phonograph demonstrations, despite technological limitations, undertook acoustic experiments that enabled audiences to discern new forms of meaning, pleasure, and pathos in even the most well-known material. The recordings considered here include ‘Mary Had a Little Lamb’ as well as scripts by Tennyson, Caroline Norton, Edgar Allan Poe, Shakespeare, and others. Such recitals illustrate the extent to which Edison’s talking machine influenced the reception of texts while at the same time giving rise to performances unheard of in previous cultures.

The Nuclear Thomas-Fermi Model

Science.gov (United States)

Myers, W. D.; Swiatecki, W. J.

1994-08-01

The statistical Thomas-Fermi model is applied to a comprehensive survey of macroscopic nuclear properties. The model uses a Seyler-Blanchard effective nucleon-nucleon interaction, generalized by the addition of one momentum-dependent and one density-dependent term. The adjustable parameters of the interaction were fitted to shell-corrected masses of 1654 nuclei, to the diffuseness of the nuclear surface and to the measured depths of the optical model potential. With these parameters nuclear sizes are well reproduced, and only relatively minor deviations between measured and calculated fission barriers of 36 nuclei are found. The model determines the principal bulk and surface properties of nuclear matter and provides estimates for the more subtle, Droplet Model, properties. The predicted energy vs density relation for neutron matter is in striking correspondence with the 1981 theoretical estimate of Friedman and Pandharipande. Other extreme situations to which the model is applied are a study of Sn isotopes from {sup 82}Sn to {sup 170}Sn, and the rupture into a bubble configuration of a nucleus (constrained to spherical symmetry) which takes place when Z{sup 2}/A exceeds about 100.

Application of the Thomas-Fermi statistical model to the thermodynamics of high density matter; Aplicacion del modelo estadistico de Thomas-Fermi a la termodinamica de medios ultradensos

Energy Technology Data Exchange (ETDEWEB)

Martin, R

1977-07-01

The Thomas-Fermi statistical model, from the N-body point of view is used in order to have systematic corrections to the T-Fermis equation. Approximate calculus methods are found from analytic study of the T-Fermis equation for non zero temperature. T-Fermis equation is solved with the code GOLEM written in FORTRAN V (UNIVAC). It also provides the thermodynamical quantities and a new method to calculate several isothermal tables. (Author) 24 refs.

Elk monitoring in Lewis and Clark National Historical Park: 2008-2012 synthesis report

Science.gov (United States)

Griffin, Paul C.; Jenkins, Kurt J.; Cole, Carla; Clatterbuck, Chris; Boetsch, John; Beirne, Katherine

2014-01-01

Maintaining elk (Cervus elaphus roosevelti) herds that frequent Lewis and Clark National Historical Park (NHP) is central to the park’s purpose of preserving the historic, cultural, scenic, and natural resources associated with the winter encampment of the Lewis and Clark expedition. Elk were critically important to the Lewis and Clark expedition in providing food and hides that sustained the expedition during the winter of 1805-06 and supplied them for their return east during 1806. Today, elk remain a key component of interpreting the Lewis and Clark story to over 200,000 park visitors each year at the Fort Clatsop visitor center. In 2008, the US Geological Survey (USGS) began collaborating with Lewis and Clark NHP and the NPS North Coast and Cascades Network to develop a protocol for monitoring long-term changes in the magnitude and spatial patterns of elk use within and adjacent to Lewis and Clark NHP (Griffin et al. 2011). Specific objectives of the monitoring program were to measure trends in (1) relative use of the Fort Clatsop unit by elk during winter; (2) the proportion of areas where elk sign is present in the Fort Clatsop unit in winter; and (3) the frequency of elk sightings from roads in and around the Fort Clatsop unit. This report synthesizes the results of the first four years of monitoring elk distribution and use in Lewis and Clark NHP from 2008-2012. We also present data from FY2012 (Appendix 1), in lieu of an annual report for that year. We used fecal pellet group surveys as the cornerstone for monitoring trends in both relative use of the Fort Clatsop Unit by elk and the proportion of areas where elk sign was present at the end of winter. We estimated pellet group density based on data collected from a network of fecal pellet plots distributed systematically throughout the unit. We developed a double observer sampling scheme that enabled us to estimate detection biases and improve the accuracy of pellet group density estimates. We computed

Cholinergic and dopaminergic activities in senile dementia of Lewy body type.

Science.gov (United States)

Perry, E K; Marshall, E; Perry, R H; Irving, D; Smith, C J; Blessed, G; Fairbairn, A F

1990-01-01

Analyses of brain tissue in a recently identified group of elderly demented patients suggest a neurochemical basis for some of the clinical features. Senile dementia of the Lewy body type (SDLT) can be distinguished from classical Alzheimer disease (AD) clinically by its acute presentation with confusion frequently accompanied by visual hallucinations, and neuropathologically by the presence of Lewy bodies and senile plaques (but not generally neurofibrillary tangles) in the cerebral cortex. Reductions in the cortical cholinergic enzyme choline acetyltransferase were more pronounced in individuals with (80%) compared to those without (50%) hallucinations and correlated strongly with mental test scores in the group as a whole. In the caudate nucleus, dopamine levels were related to the number of neurons in the substantia nigra, there being a 40-60% loss of both in SDLT--probably accounting for mild extrapyramidal features in some of these cases--compared with an 80% loss in Parkinson disease and no change in AD. The cholinergic correlates of mental impairment in SDLT together with the relative absence of cortical neurofibrillary tangles and evidence for postsynaptic cholinergic receptor compensation raise the question of whether this type of dementia may be more amenable to cholinotherapy than classical AD.

Dualling Thomas: Maine College Helps Students Earn College Credit While in High School

Science.gov (United States)

MacKenzie, Riley

2016-01-01

The Pathways Program allows juniors and seniors in high school who have a high school GPA of 3.0, a demonstrated capacity for college work, and a recommendation of the high school guidance counselor, to pursue their associate degrees at Thomas College in Waterville, Maine, while completing the requirements for their high school diploma at…

From pioneering to implementing automated blood pressure measurement in clinical practice: Thomas Pickering's legacy

DEFF Research Database (Denmark)

Stolarz-Skrzypek, Katarzyna; Thijs, Lutgarde; Wizner, Barbara

2010-01-01

Thomas G. Pickering spent most of his scientific career in carrying out research on clinical hypertension and blood pressure (BP) measurement. In our review of Pickering's seminal work, we first focused on white-coat hypertension and masked hypertension, two terms that he had introduced. Next, we...

Lübecki filmipäevad 1999 ja Thomas Manni ekraniseering 1923 / Lauri Kärk

Index Scriptorium Estoniae

Kärk, Lauri, 1954-

1999-01-01

4.-7. novembrini Lübeckis toimunud Põhjamaade filmipäevade 41. Nordische Filmtage huvitavamatest filmidest, nagu Thomas Manni "Buddenbrookide" ekraniseering 1923. aastast (režissöör Gerhard Lamprecht) ja Rasmus Gerlachi dokumentaal "Operaator Kaufman" Dziga Vertovist ja tema kahest, samuti kino alal tegutsenud vennast

Dalit humanization: A Quest based on M.M. Thomas' theology of salvation and humanization

NARCIS (Netherlands)

Rajaiah, J.

2016-01-01

Chapter one states the central quest of this thesis: to develop a Dalit theology on the basis of the concepts salvation and humanization of M.M. Thomas. Chapter two elucidates the socio- political and religious milieu which influenced his theology. Thomas’ theology has evolved and developed in

Wind Power Opportunities in St. Thomas, USVI: A Site-Specific Evaluation and Analysis

Energy Technology Data Exchange (ETDEWEB)

Lantz, E.; Warren, A.; Roberts, J. O.; Gevorgian, V.

2012-09-01

This NREL technical report utilizes a development framework originated by NREL and known by the acronym SROPTTC to assist the U.S. Virgin Islands in identifying and understanding concrete opportunities for wind power development in the territory. The report covers each of the seven components of the SROPTTC framework: Site, Resource, Off-take, Permitting, Technology, Team, and Capital as they apply to wind power in the USVI and specifically to a site in Bovoni, St. Thomas. The report concludes that Bovoni peninsula is a strong candidate for utility-scale wind generation in the territory. It represents a reasonable compromise in terms of wind resource, distance from residences, and developable terrain. Hurricane risk and variable terrain on the peninsula and on potential equipment transport routes add technical and logistical challenges but do not appear to represent insurmountable barriers. In addition, integration of wind power into the St. Thomas power system will present operational challenges, but based on experience in other islanded power systems, there are reasonable solutions for addressing these challenges.

Globe Event | Lecture by Hervé Dessimoz and Thomas Büchi | 14 May

CERN Document Server

Globe Info

2013-01-01

At the summit of Sustainable Development, by Hervé Dessimoz and Thomas Büchi.   Globe de la science et de l'innovation Route de Meyrin, 1211 Genève Tuesday 14 May 2013 at 8:30 p.m. The lecture will be in French Refuge du Goûter. Hervé Dessimoz and Thomas Büchi have been committed to sustainable development since the 2000s. They created the Palais de l’Équilibre at Expo.02. They designed an exhibition in conjunction with the Cité de la Science et de l’Industrie (Paris) to educate visitors about sustainable development. The pavilion was donated to CERN by the Swiss Confederation and rebuilt on the CERN site in 2004. It is now known as the Globe of Science and Innovation. The Refuge du Goûter, on the slopes of Mont Blanc, is the culmination of their research into sustainable development, with the aim of demonstrating that if we can construct a building at 3835 m which is a...

Applied analytical combustion/emissions research at the NASA Lewis Research Center

Science.gov (United States)

Deur, J. M.; Kundu, K. P.; Nguyen, H. L.

1992-01-01

Emissions of pollutants from future commercial transports are a significant concern. As a result, the Lewis Research Center (LeRC) is investigating various low emission combustor technologies. As part of this effort, a combustor analysis code development program was pursued to guide the combustor design process, to identify concepts having the greatest promise, and to optimize them at the lowest cost in the minimum time.

Lewis basicity, adhesion thermodynamic work and coordinating ability on aminated silicon surfaces

International Nuclear Information System (INIS)

Sánchez, M. Alejandra; Paniagua, Sergio A.; Borge, Ignacio; Viales, Christian; Montero, Mavis L.

2014-01-01

Highlights: • Silicon(1 0 0) surfaces with diamines followed by anchoring of copper complexes over the diamine layer, an approach that could be used for advanced functionalization of semiconducting surfaces. • Lewis basicity (using Fowkes–van Oss–Chaudhury–Good surface tension model) and adhesion thermodynamic work (using chemical force microscopy) were determined. • Higher basicity and thermodynamic work correlate with selective copper acetate monolayer grow. The cyclic voltammetry studies confirm the confined copper redox activity. - Abstract: Silicon(1 0 0) surfaces have been modified with three different amines (aniline, benzylamine and dodecylamine) and diamines (4-aminopyridine, 4-aminomethylpyridine, 1,12-dodecyldiamine). The surface energy was measured by contact angle technique. For Si-diamine surfaces, Lewis basicity (using Fowkes–van Oss–Chaudhury–Good surface tension model) and adhesion thermodynamic work (using chemical force microscopy) were determined. We related these data, the amine/diamine nature and their geometry on the surface (via DFT calculations) with the consequent ability to coordinate copper(II) acetate. Finally, copper(II) acetate monolayers behavior was studied by cyclic voltammetry

GUERRA E PAZ NA TEORIA POLÍTICA DE THOMAS HOBBES

Directory of Open Access Journals (Sweden)

Lígia Pavan Baptista

2014-08-01

Full Text Available Este artigo tem o objetivo de analisar em que medida a teoria política moderna, tal como apresentada por Thomas Hobbes, expondo um novo paradigma na análise de questões como a origem do Estado e do poder político, assim como, definindo, por meio de metodologia científica, conceitos tais como guerra, paz, soberania, justiça, igualdade e liberdade, podem estabelecer as raízes de questões das relações internacionais, apesar de não ser o principal objetivo do autor.

Lewis base catalyzed 1,3-dithiane addition to carbonyl and imino compounds using 2-trimethylsilyl-1,3-dithiane.

Science.gov (United States)

Michida, Makoto; Mukaiyama, Teruaki

2008-09-01

Lewis base-catalyzed 1,3-dithiane addition to electrophiles such as carbonyl compounds and N-substituted aldimines with 2-trimethylsilyl-1,3-dithiane (TMS-dithiane) is described. By the activation of the carbon-silicon bond in the presence of a Lewis base catalyst such as tetrabutylammonium phenoxide (PhONnBu(4)), a 1,3-dithiane addition reaction proceeded smoothly to afford the corresponding adducts in good to high yields under mild conditions. This synthesis is also applied to the reactions of ketones having alpha-protons, and of N-substituted aldimines.

NASA Lewis and Ohio Company Hit Hole in One

Science.gov (United States)

1998-01-01

Ben Hogan Company's Golf Ball Division, which is based in Elyria, Ohio, had developed concepts and prototypes for new golf balls but was unable to determine exact performance characteristics. Specifically, the company's R&D department wanted to measure the spin rates of experimental golf balls. After the Golf Ball Division requested assistance, researchers and technicians from the NASA Lewis Research Center went to Elyria and conducted several days worth of tests. Ben Hogan is using the test results to improve the spin characteristics of a new ball it plans to introduce to the market.

Telecommuting (Work-At-Home) at NASA Lewis Research Center

Science.gov (United States)

Srinidhi, Saragur M.

1994-01-01

This report presents a study in evaluating the viability of providing a work-at-home (telecommuting) program for Lewis Research Center's corporate employees using Integrated Services Digital Network (ISDN). Case studies have been presented for a range of applications from casual data access to interactive access. The network performance of telemedia applications were studied against future requirements for such level of remote connectivity. Many of the popular ISDN devices were characterized for network and service functionality. A set of recommendations to develop a telecommuting policy have been proposed.

Applied high-speed imaging for the icing research program at NASA Lewis Research Center

Science.gov (United States)

Slater, Howard; Owens, Jay; Shin, Jaiwon

1992-01-01

The Icing Research Tunnel at NASA Lewis Research Center provides scientists a scaled, controlled environment to simulate natural icing events. The closed-loop, low speed, refrigerated wind tunnel offers the experimental capability to test for icing certification requirements, analytical model validation and calibration techniques, cloud physics instrumentation refinement, advanced ice protection systems, and rotorcraft icing methodology development. The test procedures for these objectives all require a high degree of visual documentation, both in real-time data acquisition and post-test image processing. Information is provided to scientific, technical, and industrial imaging specialists as well as to research personnel about the high-speed and conventional imaging systems will be on the recent ice protection technology program. Various imaging examples for some of the tests are presented. Additional imaging examples are available from the NASA Lewis Research Center's Photographic and Printing Branch.

The non-intuitive 1/2 Thomas factor: a heuristic argument with classical electromagnetism

International Nuclear Information System (INIS)

Chrysos, M

2006-01-01

We present a heuristic argument to deduce the non-intuitive 1/2 Thomas factor for an atomic electron revolving in its orbit about the nucleus. The argument, which is simple, pedagogical and accessible to physics beginners, uses elementary notions of classical electromagnetism rather than the advanced relativity concepts which are needed in any standard textbook derivation

Briti teadlane: kübersõda ei tule / Thomas Rid ; intervjueerinud Raimo Poom

Index Scriptorium Estoniae

Rid, Thomas

2013-01-01

Sõjauuringute õppejõud Thomas Rid leiab, et internetis on palju ohte, kuid kübersõda ei ole üks neist. Ridi arvates on äärmiselt ebatõenäoline, et NATO käivitaks kunagi küberrünnaku tõttu 5. artikli. Interneti kõige suuremaks ohustajaks pole NSA, vaid vabadust piirata soovivad autoritaarsed riigid

The Reverend Thomas Jefferson Bowen: An Introductory Background to His Linguistic Works, 1850-1856

Science.gov (United States)

Awoniyi, Timothy A.

1974-01-01

A historical narrative background for the linguistic works of Thomas Jefferson Bowen, an American missionary who was the first non-Nigerian to publish a grammar of Yoruba (1858). The author points up a need for further scholarly review of Bowen's pioneering work and contribution to Yoruba studies. (JT)

Molecular characterization and experimental host range of an isolate of Wissadula golden mosaic St. Thomas virus.

Science.gov (United States)

Collins, A M; Mujaddad-ur-Rehman, Malik; Brown, J K; Reddy, C; Wang, A; Fondong, V; Roye, M E

2009-12-01

Partial genome segments of a begomovirus were previously amplified from Wissadula amplissima exhibiting yellow-mosaic and leaf-curl symptoms in the parish of St. Thomas, Jamaica and this isolate assigned to a tentative begomovirus species, Wissadula golden mosaic St. Thomas virus. To clone the complete genome of this isolate of Wissadula golden mosaic St. Thomas virus, abutting primers were designed to PCR amplify its full-length DNA-A and DNA-B components. Sequence analysis of the complete begomovirus genome obtained, confirmed that it belongs to a distinct begomovirus species and this isolate was named Wissadula golden mosaic St. Thomas virus-[Jamaica:Albion:2005] (WGMSTV-[JM:Alb:05]). The genome of WGMSTV-[JM:Alb:05] is organized similar to that of other bipartite Western Hemisphere begomoviruses. Phylogenetic analyses placed the genome components of WGMSTV-[JM:Alb:05] in the Abutilon mosaic virus clade and showed that the DNA-A component is most closely related to four begomovirus species from Cuba, Tobacco leaf curl Cuba virus, Tobacco leaf rugose virus, Tobacco mottle leaf curl virus, and Tomato yellow distortion leaf virus. The putative Rep-binding-site motif in the common region of WGMSTV-[JM:Alb:05] was observed to be identical to that of Chino del tomate virus-Tomato [Mexico:Sinaloa:1983], Sida yellow mosaic Yucatan virus-[Mexico:Yucatan:2005], and Tomato leaf curl Sinaloa virus-[Nicaragua:Santa Lucia], suggesting that WGMSTV-[JM:Alb:05] is capable of forming viable pseudo-recombinants with these begomoviruses, but not with other members of the Abutilon mosaic virus clade. Biolistic inoculation of test plant species with partial dimers of the WGMSTV-[JM:Alb:05] DNA-A and DNA-B components showed that the virus was infectious to Nicotiana benthamiana and W. amplissima and the cultivated species Phaseolus vulgaris (kidney bean) and Lycopersicon esculentum (tomato). Infected W. amplissima plants developed symptoms similar to symptoms observed under field

Las revoluciones de Thomas Kuhn, una mirada discontinuista

Directory of Open Access Journals (Sweden)

Pablo Melogno

Full Text Available Resumen Se discuten algunas divergencias entre La revolución copernicana (1957 y La estructura de las revoluciones científicas (1962, de Thomas Kuhn. Se muestra que presentan una consideración diferente de los factores extracientíficos, que tienen en la primera un peso explicativo mayor. Se propone que en 1957 Kuhn maneja una historiografía casuística, centrada en la revolución copernicana, y en 1962 una historiografía estructural, centrada en los rasgos invariantes de las revoluciones científicas. Se concluye que las diferencias entre las dos obras son lo suficientemente profundas como para no considerarlas expresión de una misma visión de la ciencia.

Status of Thomas Jefferson National Accelerator Facility (Jefferson Lab)

International Nuclear Information System (INIS)

H.A. Grunder

1997-01-01

When first beam was delivered on target in July 1994, the Continuous Electron Beam Accelerator Facility (CEBAF), in Newport News, Virginia realized the return on years of planning and work to create a laboratory devoted to exploration of matter that interacts through the strong force, which holds the quarks inside the proton and binds protons and neutrons into the nucleus. Dedicated this year as the Thomas Jefferson National Accelerator Facility (Jefferson Lab), the completion of construction and beginning of its experimental program has culminated a process that began more than a decade ago with the convening of the Bromley Panel to look at research possibilities for such an electron accelerator

Thomas James Walker (1835-1916): Surgeon and general practitioner.

Science.gov (United States)

Thomas, Martyn

2018-02-01

Thomas James Walker was a surgeon and general practitioner who worked in the city of Peterborough at a time when there were changes and innovations in the practice of medicine. After training in medicine and surgery at Edinburgh University, he qualified in London in 1857. He was a pioneer of laryngoscopy. He played an important role in introducing antiseptic surgery to the Peterborough Infirmary and was instrumental in the development of the operating theatre which opened in 1894. He was a philanthropist and collector of Roman and Saxon artefacts. In 1915, he was recognized as an outstanding member of the Peterborough community when he was offered the Freedom of the City.

Lewis Nkosi: A Fragile Soul's Quest for Home | Gall | English in Africa

African Journals Online (AJOL)

Lewis Nkosi left South Africa in 1961 on a permanent exit visa on his way to study at Harvard as a Nieman Fellow. During his seventy-three years, he lived in England, America, Zambia, Poland, and Switzerland, and he transitioned from denying homesickness (because he had no home) to feeling it acutely (because he had ...

Solid State Technology Branch of NASA Lewis Research Center: Fifth Annual Digest

International Nuclear Information System (INIS)

1993-08-01

The digest is a collection of papers written by the members of the Solid State Technology Branch of NASA Lewis Research Center from June 1992-June 1993. The papers cover a range of topics relating to superconductivity, monolithic microwave integrated circuits (MMIC's), coplanar waveguide, and material characterization. Individual papers are abstracted separately on the data base

Św.Tomasza z Akwinu charakterystyka aktów woli / The Acts of the Will According to St. Thomas Aquinas

Directory of Open Access Journals (Sweden)

Hubert Wiśniewski

2015-06-01

Full Text Available The article attempts to clarify an important aspect of St. Thomas Aquinas’s theory of human action, namely to show these acts of man which are immediately caused by the will. According to some contemporary philosophers, the acts of the will are limited to those of trying or of intending. Do they exhaust the whole possibility of the will to act? The author seeks to answer this question basing his considerations on the analysis of the Summa Theologiae by St. Thomas Aquinas.

Group Dynamics in Long -term blind endeavors on Earth as an analog for Remote Space Missions (Lewis & Clark Expedition, 1803 - 1806, Dynamic Analysis)

Science.gov (United States)

Allner, M.; Rygalov, V.; Reilly, J.

In 1803 President Thomas Jefferson set fourth a military expedition led by Captains newline M Lewis and W Clark L C Expedition on an exploration to learn more about the large territory of land the U S had just purchased from France Cavan 1991 Their mission was to find a direct water route to the Pacific Ocean for the purpose of commerce and further industrial development Edwards 1999 Looking back at the events of this exploration there are many similarities to the experiences future human space explorers will face as we look to colonize the Moon and travel to Mars and beyond NASA Vision for Space Exploration 2004 - The L C Expedition lasted almost three years and involved a crew of 43 men traveling up the Missouri River to explore the unknown lands and a possible water route to the Pacific Ocean newline - The expedition took place far away from customary comfortable environments known to European settlers in early 18th century newline - The expedition involved a remotely confined high-perceived risk environment with high levels of uncertainty providing stresses and every day challenges for the crew newline - Supplies brought on the mission were limited mainly a mass weight issue rather than cost therefore the discovery and use of environmental resources In-Situ Resource Utilization approach including info-resources to mitigate uncertainty was necessary for crew survival The environments astronauts will encounter in space and on the Moon and Mars due to high risk and uncertainty will be in many aspects similar

78 FR 65511 - Death of Thomas S. Foley Former Speaker of the House of Representatives

Science.gov (United States)

2013-10-31

... Vol. 78 Thursday, No. 211 October 31, 2013 Part IV The President Proclamation 9046--Death of Thomas S. Foley Former Speaker of the House of Representatives #0; #0; #0; Presidential Documents #0; #0...; #0; #0;Title 3-- #0;The President [[Page 65513

Spherical time dependent Thomas-Fermi calculation of the dynamical evolution of hot and compressed nuclei

International Nuclear Information System (INIS)

Nemeth, J.; Barranco, M.; Ngo, C.; Tomasi, E.

1985-01-01

We have used a self-consistent time dependent Thomas-Fermi model at finite temperature to calculate the dynamical evolution of hot and compressed nuclei. It has been found that nuclei can accomodate more thermal energy than compressional energy before they break. (orig.)

Numerical Modeling of Climatic Change from the Terminus Record of Lewis Glacier, Mount Kenya.

Science.gov (United States)

Kruss, Phillip Donald

Over the last 100 years, the glaciers and lakes of East Africa have undergone dramatic change in response to climatic forcing. However, the available conventional meterological series have not proven sufficient to explain these environmental events. The secular climatic change at Lewis Glacier, Mount Kenya (0(DEGREES)9'S, 37(DEGREES)19'E), is reconstructed from its terminus record documented since 1893. The short-time-step numerical model developed for this study consists of climate and ice dynamics segments. The climate segment directly computes the effect on the net balance of change in the four forcings: precipitation, albedo, cloudiness, and temperature. The flow segment calculates the dynamic glacier response to net balance variation. Climatic change occurs over a wide range of time scales. Each glacier responds in a unique fashion to this spectrum of climatic forcings. The response of the Lewis terminus extent to repeated sinusoidal fluctuation in the net balance is calculated. The net balance versus elevation profile is separately translated along the orthogonal balance and elevation axes. Net balance amplitudes of 0.1 to 0.5 m a('-1) of ice and 10 to 50 m elevation, respectively, and periods ranging from 20 to 1000 years are covered. Consideration of the Lewis response is perspective with similar results for Hintereisferner, Storglaciaren, and Berendon and South Cascade Glaciers identifies general characteristics of the time lag and amplitude of the terminus response. The magnitude and timing of the change in only one of the climatic forcings precipitation, albedo, cloudiness, or temperature necessary to produce the retreat of the Lewis terminus from its late 19th century maximum are computed. Equivalent changes for two scenarios of simultaneous variation, namely precipitation/albedo/cloudiness and temperature/albedo, are also estimated. These numerical results are interpreted in the light of long-term lake level, river flow, and instrumental information. A

Fort Lewis natural gas and fuel oil energy baseline and efficiency resource assessment

International Nuclear Information System (INIS)

Brodrick, J.R.; Daellenbach, K.K.; Parker, G.B.; Richman, E.E.; Secrest, T.J.; Shankle, S.A.

1993-02-01

The mission of the US Department of Energy (DOE) Federal Energy Management Program (FEMP) is to lead the improvement of energy efficiency and fuel flexibility within the federal sector. Through the Pacific Northwest Laboratory (PNL), FEMP is developing a fuel-neutral approach for identifying, evaluating, and acquiring all cost-effective energy projects at federal installations; this procedure is entitled the Federal Energy Decision Screening (FEDS) system. Through a cooperative program between FEMP and the Army Forces Command (FORSCOM) for providing technical assistance to FORSCOM installations, PNL has been working with the Fort Lewis Army installation to develop the FEDS procedure. The natural gas and fuel oil assessment contained in this report was preceded with an assessment of electric energy usage that was used to implement a cofunded program between Fort Lewis and Tacoma Public Utilities to improve the efficiency of the Fort's electric-energy-using systems. This report extends the assessment procedure to the systems using natural gas and fuel oil to provide a baseline of consumption and an estimate of the energy-efficiency potential that exists for these two fuel types at Fort Lewis. The baseline is essential to segment the end uses that are targets for broad-based efficiency improvement programs. The estimated fossil-fuel efficiency resources are estimates of the available quantities of conservation for natural gas, fuel oils number-sign 2 and number-sign 6, and fuel-switching opportunities by level of cost-effectiveness. The intent of the baseline and efficiency resource estimates is to identify the major efficiency resource opportunities and not to identify all possible opportunities; however, areas of additional opportunity are noted to encourage further effort

Production of Jet Fuel-Range Hydrocarbons from Hydrodeoxygenation of Lignin over Super Lewis Acid Combined with Metal Catalysts

International Nuclear Information System (INIS)

Wang, Hongliang; Wang, Huamin; Kuhn, Eric; Tucker, Melvin P.; Yang, Bin

2017-01-01

Super Lewis acids containing the triflate anion [e.g., Hf(OTf) 4 , Ln(OTf) 3 , In(OTf) 3 , Al(OTf) 3 ] and noble metal catalysts (e.g., Ru/C, Ru/Al2O 3 ) formed efficient catalytic systems to generate saturated hydrocarbons from lignin in high yields. In such catalytic systems, the metal triflates mediated rapid ether bond cleavage through selective bonding to etheric oxygens while the noble metal catalyzed subsequent hydrodeoxygenation (HDO) reactions. Near theoretical yields of hydrocarbons were produced from lignin model compounds by the combined catalysis of Hf(OTf)4 and ruthenium-based catalysts. When a technical lignin derived from a pilot-scale biorefinery was used, more than 30 wt % of the hydrocarbons produced with this catalytic system were cyclohexane and alkylcyclohexanes in the jet fuel range. Super Lewis acids are postulated to strongly interact with lignin substrates by protonating hydroxyl groups and ether linkages, forming intermediate species that enhance hydrogenation catalysis by supported noble metal catalysts. Meanwhile, the hydrogenation of aromatic rings by the noble metal catalysts can promote oxygenation reactions catalyzed by super Lewis acids.

Production of Jet Fuel-Range Hydrocarbons from Hydrodeoxygenation of Lignin over Super Lewis Acid Combined with Metal Catalysts

Energy Technology Data Exchange (ETDEWEB)

Wang, Hongliang [Department of Biological Systems Engineering, Washington State University, Richland WA 99354 USA; Current address: Center of Biomass Engineering/College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193 PR China; Wang, Huamin [Pacific Northwest National Laboratory, 902 Battelle Boulevard Richland WA 99354 USA; Kuhn, Eric [National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway Golden CO 80401 USA; Tucker, Melvin P. [National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway Golden CO 80401 USA; Yang, Bin [Department of Biological Systems Engineering, Washington State University, Richland WA 99354 USA

2017-11-14

Super Lewis acids containing the triflate anion (e.g. Hf(OTf)4, Ln(OTf)3, Al(OTf)3) and noble metal catalysts (e.g. Ru/C, Ru/Al2O3) formed efficient catalytic systems to generate saturated hydrocarbons from lignin in high yields. In such catalytic systems, the metal triflates mediated rapid ether bond cleavage via selective bonding to etheric oxygens while the noble metal catalysed subsequent hydrodeoxygenation (HDO) reactions. Near theoretical yields of hydrocarbons were produced from lignin model compounds by the combined catalysis of Hf(OTf)4 and ruthenium-based catalysts. When a technical lignin derived from a pilot-scale biorefinery was used, more than 30 wt% of the hydrocarbons produced with this catalytic system were cyclohexane and alkylcyclohexanes in the jet fuel range. Super Lewis acids are postulated to strongly interact with lignin substrates via protonating hydroxyls and ether linkages, forming intermediate species that enhance hydrogenation catalysis by supported noble metal catalysts. Meanwhile, the hydrogenation of aromatic rings by the noble metal catalysts can promote oxygenation reactions catalysed by super Lewis acids.

Jesus en geweld: Markus 12:1-12 (en par) en Thomas 65 | van Eck ...

African Journals Online (AJOL)

Jesus and violence: Mark 12:1-12 (and par) and. Thomas 65. As an advanced agrarian (aristocratic) society, first-century Palestine's social fabric was built on systemic tensions and conflicts between the elite (rulers) and the peasantry (the ruled). At the root of these conflicts were incompatible values (ideologies) and