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1

What I Learned From Henry Dick: Highlights and What's Left for Us?  

NASA Astrophysics Data System (ADS)

(1) Slow spreading ridges have lots of peridotite outcrops, especially at segment ends. This dove-tailed with seismic and gravity observations, and geodynamic modeling, to yield a community consensus on 3D crustal accretion. However there are an increasingly large number of abysmal peridotite outcrops known at segment centers, so what is happening to the simple 3D picture? (2) There are global systematics in abysmal peridotite compositions, and in corresponding MORB, that define apparent melting trends. However (a) Why do the peridotite trends slope the wrong way on phase diagrams? (b) How come local variability in some fracture zones is almost as large as global variability? (c) What are the pyroxene proportions when corrected to magmatic temperature? (d) To what extent are the modal data affected by density changes during hydrous alteration? (e) To what extent are pyroxene and olivine contents affected by reactive dissolution and/or "impregnation"? (f) What does it mean when highly depleted peridotites are sampled from very cold parts of the ridge system? (3) Fractional melting is likely. Well, OK, near fractional. However (a) How many of those clinopyroxenes analyzed by Johnson et al (JGR 90) and Johnson & Dick (JGR 92) are igneous? Particularly the most depleted ones must be metamorphic. Given the diffusion data, what do the trace element concentrations really tell us? (b) What about the whole rock data? (4) The average composition of oceanic gabbros from ODP Hole 735B = average MORB, for trace as well as major elements. How does this work? Average MORB results from ~ 50% crystal fractionation. Where are the corresponding cumulates to balance lavas & 735B style gabbro sections? (5) Re-circulating, depleted peridotites can melt over and over again, provided they are reheated to `ambient' potential temperature during their residence in the convecting mantle. (6) There are important feedbacks between localized melt transport and localized deformation, in the mantle and probably in the oceanic lower crust. (7) A lot of abysmal peridotites from 14-16 N on the MAR lack subsolidus deformation, despite having made a journey through the lithosphere to the seafloor. (8) Oblique spreading segments probably have slower mantle upwelling rates than orthogonal segments in the same region. (9) There are large offset, low angle normal faults that expose peridotite and gabbro at slow spreading ridges. (10) Inside corner highs are commonly underlain by peridotite. (penultimate) I did not LEARN much about dunites from Henry. However, we AGREED from an early date that dunites are very interesting conduits for olivine-saturated melt passing through pyroxene-bearing wall rocks, that formed at least in part by pyroxene dissolution during porous flow, and that could be important for understanding disequilibrium between MORB and shallow mantle peridotite. (last and least) Some horizontal dunites MAY form by vertical migration of melt across pre-existing, horizontal pyroxene layers. At this point in the talk, I will eat my hat.

Kelemen, P.

2006-12-01

2

Moby Dick.  

ERIC Educational Resources Information Center

Discusses examples in "Moby Dick" of Melvillean words symptomatic of the significance of Ishmael's rhetorical energy, in order to suggest that Ishmael's language reflects Melville's search for lexical and rhetorical forms that express the democratic impulse. (SRT)

Stern, Milton R.

1986-01-01

3

Henry's Gallery  

NSDL National Science Digital Library

This site showcases the work of Henry Diltz, the official photographer of the Woodstock and Monterey Pop Festivals and over 100 album covers. Although the site is designed as a commercial enterprise (many of the photos can be ordered at the site), users are free to browse this collection of over 100 photos, some with brief notes, of many of the leading Rock and Roll musicians of the 1960s and 70s. Some of the photos were taken during posed sessions or album cover shoots, but many are candids to be found nowhere else. Highlights include shots of Joni Mitchell, David Crosby, and Eric Clapton in Mama Cass's backyard; Jerry Garcia jamming at Crosby's house; and the Who at the Monterey Pop Festival with a hapless engineer trying to save his microphones from Pete Townshend's flailing guitar. Additional resources include a brief special feature on Henry's recollections of Woodstock (with photos).

Diltz, Henry.

4

John Henry: Then and Now.  

ERIC Educational Resources Information Center

Compares three children's books retelling the legend of John Henry: "John Henry: An American Legend" by Ezra Jack Keats (1965), "John Henry" by Julius Lester (1994), and "The Legend of John Henry" by Terry Small (1994). Differences in imagery, language, symbolism, and themes are discussed. (MAK)

Nikola-Lisa, W.

1998-01-01

5

Henry's Law and Noisy Knuckles.  

ERIC Educational Resources Information Center

Discusses Henry's Law which describes the relationship between the pressure of gas and the concentration of that gas in a solution. Presents an application of Henry's Law to the cracking of knuckles. (CCM)

Kimbrough, Doris R.

1999-01-01

6

Jordan-Brans-Dicke Theory  

NASA Astrophysics Data System (ADS)

This is primarily an historical survey of the origins and evolution of only one of a variety of many scalar-tensor (ST) alternatives to the standard Einstein equations of General Relativity. This review will only address itself to what has become known as the Brans-Dicke, or more properly Jordan-Brans-Dicke, theory based on the 1961 publications of Brans and Dicke. These papers substantially duplicate much of the work of Jordan and his group. However, for several reasons, including the stature of Dicke, this theoretical work from the 1960's was seminal in triggering an explosion of interest, both theoretical and experimental, into Einstein's theory and its alternatives. Until that time the early corroboration of Einstein's equations seemed to preclude interest in investigation of alternatives. From the 1960's on however, ST theories provided a remarkable impetus for renewed exploration into gravitational physics. Perhaps this has been their most significant contribution to the field of space-time physics, now especially in cosmology.

Brans, Carl H.

2014-03-01

7

Moby-Dick. [Lesson Plan].  

ERIC Educational Resources Information Center

Based on Herman Melville's novel "Moby-Dick," this lesson plan presents activities designed to help students understand that the novel is grounded in facts that Melville acquired in his own experiences at sea; New England was the center of a prospering whaling industry in the 19th century; and journal keeping was not uncommon among 19th-century…

Soderquist, Alisa

8

Henry M. Jackson  

NSDL National Science Digital Library

Henry M. Jackson served for over three decades in the U.S. Senate. First elected in 1941, Jackson was a strong supporter of the defense industries located in Washington and also found time to run for President in 1972 and 1976. Recently, the University of Washington Digital Collections program created the Henry M. Jackson digital collection for the use of scholars and anyone with an interest in political and state history. First-time visitors should read the essay about Jackson titled "A Legacy of Public Service" and then begin looking over the nice archive of photos. The photos are contained within fifteen different sections, such as "Atomic Energy and Hanford", "In Washington State", and "With the Kennedys".

9

The Henry Ford Museum  

NSDL National Science Digital Library

Whatever oneâÂÂs feelings may be about Henry Ford, his legacy to the American public is tremendous, and his love of American history is well-documented. Part of this legacy may be found at the Henry Ford Museum complex, which contains a number of operational units, such as Greenfield Village and the Benson Ford Research Center. For those who might be unable to make the pilgrimage to Michigan, the MuseumâÂÂs omnibus website will help bring some of the fine edifying material into their homes. For starters, there is the âÂÂExplore & Learnâ area of the site, which contains a number of online exhibits such as a tour of the bus that carried Rosa Parks on her fateful trip in Montgomery and the âÂÂInnovatorsâ exhibit, which profiles such Americans as Thomas Edison and R. Buckminster Fuller.

2005-01-01

10

Boy Scouts for Henry  

PubMed Central

“Can we do anything for you?” The question was embarrassing. Henry had been poked and prodded and preserved far beyond his wishes. In a medical system that scorns comfort care, a resident physician is troubled by the case of an elderly man with poor quality of life. An awkward attempt at a Boy Scout service project emphasizes how poorly we comfort the terminally ill despite modern technology and interventionalism.

Allen, Richard E.

2006-01-01

11

Required characteristics of Paenibacillus polymyxa JB-0501 as potential probiotic.  

PubMed

The ability of Paenibacillus polymyxa to inhibit the growth of Escherichia coli generic ATCC 25922 (Escherichia coli ATCC 25922) and to adhere to monolayers of the enterocyte-like human cell line Caco-2 was evaluated. P. polymyxa JB-0501 (P. polymyxa JB-0501), found in a livestock feed probiotic supplement, was compared to P. polymyxa reference strain ATCC 43685 and ATCC 7070 (P. polymyxa ATCC) in terms of carbohydrate utilization and resistance to lysozyme, acid, bile salts, and hydrogen peroxide. JB-0501 grew at pH 4.5 and at H2O2 concentrations less than 7.3 ?g/ml and presented a higher affinity to hexadecane and decane. Bile salts at 0.2 % inhibited the growth of all three strains. P. polymyxa JB-0501 and P. polymyxa ATCC 43865 adhered to Caco-2 cell monolayers. The percentage of cells that adhered ranged from about 0.35 to 6.5 % and was partially proportional to the number applied. Contact time (from 15 min to 1 h) had little impact on adhesion. P. polymyxa JB-0501 inhibited the growth of E. coli ATCC 25922, as proven by the diffusion tests in agar. Taken together, these results suggested that P. polymyxa JB-0501 has the potential probiotic properties to justify its consideration as a livestock feed supplement. PMID:23756568

Naghmouchi, Karim; Baah, John; Cudennec, Benoit; Drider, Djamel

2013-08-01

12

Measuring Henry's Cabin  

NSDL National Science Digital Library

This resource introduces students to the aspects a builder must think about before constructing a building. Students will study the cabin blueprint of Henry David Thoreau and then will find the surface area of the walls and how much paint would be needed. Then, students will find the volume of the cabin to determine the home heating needs. Thirdly, students will study the blueprint and will create a 1/10 scale of it on graph paper and then will use art supplies to create a model of the cabin. Lastly, students will design and create models of furniture to scale for the cabin.

Joseph, Linda C.; Resch, Linda D.

2002-01-01

13

JB-300: An advanced medium size transport for 2005  

NASA Technical Reports Server (NTRS)

In the fall of 1992, the TAC Team was presented with a Request for Proposal (PFP) for a mid-size (250-350 passenger) commercial transport. The aircraft was to be extremely competitive in the areas of passenger comfort, performance, and economic aspects. Through the use of supercritical airfoils, a technologically advanced Very High By-pass Ratio (VHBR) turbofan engine, a low overall drag configuration, a comparable interior layout, and mild use of composites, the JB-300 offers an economically viable choice to the airlines. The cents per passenger mile of the JB-300 is 1.76, which is considerably lower than current aircraft in the same range. Overall, the JB-300 is a technologically advanced aircraft, which will meet the demands of the 21st century.

Debrouwer, Giles; Graham, Katherine; Ison, Jim; Juarez, Vince; Moskalik, Steve; Pankonin, Jon; Weinstein, Arnold

1993-01-01

14

Take a Hike with Henry.  

ERIC Educational Resources Information Center

Presents activities and relevant Web sites associated with the picture book "Henry Hikes to Fitchburg" which is based on a passage from "Walden" by Henry David Thoreau. Includes author sites, Library of Congress sites, town profiles and histories, nature crafts, and recipes. (LRW)

Joseph, Linda C.

2000-01-01

15

Herbert and Lou Henry Hoover.  

ERIC Educational Resources Information Center

This issue of the children's magazine, "The Goldfinch," focuses on Herbert and Lou Henry Hoover. The articles included are: (1) "Getting To Know Herbert Clark Hoover"; (2) "Lou Henry Hoover"; (3) "Meet an Iowa Author"; (4) "The Great Depression"; (5) "A Different Kind of Coupon"; (6) "The President's Mountain School"; (6) "Where are the Books?";…

Frese, Millie K., Ed.

1999-01-01

16

Henry Wadsworth Longfellow  

NSDL National Science Digital Library

While many writers have to wait decades, if not centuries, after their death to receive critical or commercial success, Henry Wadsworth Longfellow was lucky to achieve both during his lifetime. Born in Portland, Maine in 1807, he was a figure of national prominence by the 1850s, and a much-beloved professor at Harvard. Recently, the Maine Historical Society created this fine tribute to the man and his work. The site is divided into seven primary sections which include an extended biographical essay about his life and work, information about his family and his homes in Portland and Cambridge. Of course, any site about Longfellow would be incomplete without a generous selection of his poems, and this site has that particular detail well covered. In the Longfellow poems database, visitors can view a sortable list of his works, which can be arranged by poem title, first line, and publication date.

17

Comment on 'New Brans-Dicke wormholes'  

SciTech Connect

It is shown that the recently claimed two new Brans-Dicke wormhole solutions [F. He and S-W. Kim, Phys. Rev. D 65, 084022 (2002)] are not really new solutions. They are just the well known Brans-Dicke solutions of Class I and II in a different conformal gauge.

Bhadra, Arunava [High Energy and Cosmic Ray Research Center, University of North Bengal, Darjeeling (W.B.) 734 430 (India); Simaciu, Ion [Department of Physics, University of 'Petrol-Gaze' Ploiesti, Ploiesti 2000 (Romania); Nandi, Kamal Kanti [Institute of Theoretical Physics, Chinese Academy of Sciences, P.O.Box 2735, Beijing 100080 (China); Department of Mathematics, University of North Bengal, Darjeeling (W.B.) 734 430 (India); Zhang Yuanzhong [CCAST (World Laboratory), P.O.Box 8730, Beijing 100080 (China); Institute of Theoretical Physics, Chinese Academy of Sciences, P.O.Box 2735, Beijing 100080 (China)

2005-06-15

18

Brans-Dicke gravity from entropic viewpoint  

NASA Astrophysics Data System (ADS)

We interpret the Brans-Dicke gravity from entropic viewpoint. We first apply Verlinde's entropic formalism in the Einstein frame, then perform the conformal transformation which connects the Einstein frame to the Jordan frame. The transformed result yields the equation of motion of the Brans-Dicke theory in the Jordan frame.

Chang-Young, Ee; Kimm, Kyoungtae; Lee, Daeho

2012-04-01

19

Brans-Dicke cylindrical wormholes  

SciTech Connect

Static axisymmetric thin-shell wormholes are constructed within the framework of the Brans-Dicke scalar-tensor theory of gravity. Examples of wormholes associated with vacuum and electromagnetic fields are studied. All constructions must be threaded by exotic matter, except in the case of geometries with a singularity of finite radius, associated with an electric field, which can have a throat supported by ordinary matter. These results are achieved with any of the two definitions of the flare-out condition considered.

Eiroa, Ernesto F. [Instituto de Astronomia y Fisica del Espacio, Casilla de Correo 67, Sucursal 28, 1428, Buenos Aires (Argentina); Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina); Simeone, Claudio [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina); IFIBA, CONICET, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina)

2010-10-15

20

Uncle Henry's Dilemma  

NSDL National Science Digital Library

Uncle Henry's Dilemma is a problem solving lesson to determine the global location for the reading of Uncle Henry's will. The students will interpret data sets which include temperature, rainfall, air pollution, travel cost, flight times and health issues to rank five global locations for Uncle Henry's relatives to travel to for the reading of his will. This is an engaging, fun-filled MEA lesson with twists and turns throughout. Students will learn how this procedure of selecting locations can be applied to everyday decisions by the government, a business, a family, or individuals.

Waters, Susie

2012-08-01

21

Henry Moon and his molars.  

PubMed

Henry Moon qualified in London in medicine and dentistry, emigrated to New Zealand, eventually returning to London. He is known for his observations of the malformation of tooth cusps in children with congenital syphilis. PMID:24620436

Waldron, Tony

2014-01-01

22

Current Distribution in Nonequilibrium J×B Devices  

Microsoft Academic Search

The interdependent problems of determining the current density field and the electron temperature and number density profiles in nonequilibrium J×B devices are formulated realistically, and solved numerically. The two-dimensional formulation includes the important effects of thermal and concentration diffusion, thermal and velocity boundary layers, and finite reaction rates on the electrical behavior of crossed-field devices, and allows each effect to

G. S. Argyropoulos; S. T. Demetriades; A. P. Kendig

1967-01-01

23

Thin-shell wormholes in Brans Dicke gravity  

NASA Astrophysics Data System (ADS)

Spherically symmetric thin-shell wormholes are constructed within the framework of Brans-Dicke gravity. It is shown that, for appropriate values of the Brans-Dicke constant, these wormholes can be supported by matter satisfying the energy conditions.

Eiroa, Ernesto F.; Richarte, Martín G.; Simeone, Claudio

2008-12-01

24

Osler and bookworms--the "Henry connection".  

PubMed Central

Insect bookworms were a little-known interest of Sir William Osler and F. P. Henry. Each man wrote an article on the subject, Osler's appearing thirteen years after that of Henry. Several unpublished communications regarding Osler's interest in bookworms are discussed. A recently-discovered 1903 inscription to Henry demonstrates Osler's early interest in bookworms and suggests that Henry may have been an important influence in generating that interest. Images

Graner, J L

1984-01-01

25

Xenobiotics enhance laccase activity in alkali-tolerant ?-proteobacterium JB  

PubMed Central

Various genotoxic textile dyes, xenobiotics, substrates (10 µM) and agrochemicals (100 µg/ml) were tested for enhancement of alkalophilic laccase activity in ?-proteobacterium JB. Neutral Red, Indigo Carmine, Naphthol Base Bordears and Sulphast Ruby dyes increased the activity by 3.7, 2.7, 2.6 and 2.3 fold respectively. Xenobiotics/substrates like p-toluidine, 8-hydroxyquinoline and anthracine increased it by 3.4, 2.8 and 2.3 fold respectively. Atrazine and trycyclozole pesticides enhanced the activity by 1.95 and 1.5 fold respectively.

Singh, Gursharan; Batish, Mona; Sharma, Prince; Capalash, Neena

2009-01-01

26

Detecting Multiparticle Entanglement of Dicke States  

NASA Astrophysics Data System (ADS)

Recent experiments demonstrate the production of many thousands of neutral atoms entangled in their spin degrees of freedom. We present a criterion for estimating the amount of entanglement based on a measurement of the global spin. It outperforms previous criteria and applies to a wider class of entangled states, including Dicke states. Experimentally, we produce a Dicke-like state using spin dynamics in a Bose-Einstein condensate. Our criterion proves that it contains at least genuine 28-particle entanglement. We infer a generalized squeezing parameter of -11.4(5) dB.

Lücke, Bernd; Peise, Jan; Vitagliano, Giuseppe; Arlt, Jan; Santos, Luis; Tóth, Géza; Klempt, Carsten

2014-04-01

27

Chamelionic generalized Brans-Dicke cosmology  

NASA Astrophysics Data System (ADS)

We discuss the late-time dynamics of a chameleonic generalized Brans-Dicke cosmology with the power law chameleonic function f ( ?) ? ? n , where n is a real parameter motivated from string theories by conjecturing that the four-dimensional Hubble parameter varies with a scale factor like ? = ?a m , where ( ?, m) are real parameters. For some critical values of m, n and the Brans-Dicke parameter, it was observed that the universe is free from the initial singularity. Both singularity-free and singular cosmological scenarios are discussed. Several cosmological tests like the physical cosmological distances and the statefinder parameters are discussed.

El-Nabulsi, R. A.

2012-02-01

28

Detecting multiparticle entanglement of Dicke states.  

PubMed

Recent experiments demonstrate the production of many thousands of neutral atoms entangled in their spin degrees of freedom. We present a criterion for estimating the amount of entanglement based on a measurement of the global spin. It outperforms previous criteria and applies to a wider class of entangled states, including Dicke states. Experimentally, we produce a Dicke-like state using spin dynamics in a Bose-Einstein condensate. Our criterion proves that it contains at least genuine 28-particle entanglement. We infer a generalized squeezing parameter of -11.4(5)??dB. PMID:24785048

Lücke, Bernd; Peise, Jan; Vitagliano, Giuseppe; Arlt, Jan; Santos, Luis; Tóth, Géza; Klempt, Carsten

2014-04-18

29

Higher dimensional Brans-Dicke theory.  

NASA Astrophysics Data System (ADS)

The modified Brans-Dicke theory with the torsion field is discussed in six-dimensional space and the static spherically symmetric solutions are obtained for the vacuum case assuming that the torsion field is generated by only extra dimensional spin angular momentum and scalar field. It is shown that the extra dimensional intrinsic spin predicts the extra components of energy-momentum tensor.

Kim, S. W.; Cho, B. H.

30

Mass inflation in Brans-Dicke gravity  

SciTech Connect

A detailed nonlinear analysis of the internal structure of spherical, charged black holes that are accreting scalar matter is performed in the framework of the Brans-Dicke theory of gravity. We choose the lowest value of the Brans-Dicke parameter that is compatible with observational constraints. First, the homogeneous approximation is used. It indicates that mass inflation occurs and that the variations of the Brans-Dicke scalar inside the black hole, which could in principle be large in the absence of mass inflation, become small when mass inflation does occur. Then, a full nonlinear numerical study of the black hole interior perturbed by a self-gravitating massless uncharged scalar field is performed. We use an algorithm with adaptive mesh refinement capabilities. In this way, the changes in the internal structure of the black hole caused by mass inflation are determined, as well as the induced variations of the Brans-Dicke scalar, confirming, qualitatively, the indications given by the homogeneous approximation.

Avelino, P. P.; Herdeiro, C. A. R. [Departamento de Fisica da Faculdade de Ciencias da, Universidade do Porto and Centro de Fisica do Porto, Rua do Campo Alegre 687, 4169-007 Porto (Portugal); Hamilton, A. J. S. [JILA and Department Astrophysical and Planetary Sciences, Box 440, University of Colorado, Boulder, Colorado 80309 (United States)

2009-06-15

31

Henry's law constants of polyols  

NASA Astrophysics Data System (ADS)

Henry's law constants (HLC) are derived for several polyols bearing between 2 and 6 hydroxyl groups, based on literature data for water activity, vapour pressure and/or solubility. Depending on the case, infinite dilution activity coefficients (IDACs), solid state pressures or activity coefficient ratios are obtained as intermediary results. For most compounds, these are the first values reported, while others compare favourably with literature data in most cases. Using these values and those from a previous work (Compernolle and Müller, 2014), an assessment is made on the partitioning of polyols, diacids and hydroxy acids to droplet and aqueous aerosol.

Compernolle, S.; Müller, J.-F.

2014-05-01

32

Bound monopoles in Brans Dicke theory  

NASA Astrophysics Data System (ADS)

We consider axially symmetric SU(2) Yang-Mills-Higgs (YMH) multimonopoles in Brans-Dicke theory for winding number n>1. In analogy to the spherically symmetric n=1 solutions, we find that the axially symmetric solutions exist for higher values of the gravitational coupling than in the pure Einstein gravity case. For large values of the gravitational coupling, the solutions collapse to form a black hole which outside the horizon can be described by an extremal Reissner-Nordström solution. Similarly as in the pure Einstein gravity case, like-charged monopoles reside in an attractive phase in a limited domain of parameter space. However, we find that the strength of attraction is decreasing for decreasing Brans-Dicke parameter ?.

Hartmann, Betti

2002-08-01

33

On Brans-Dicke black holes.  

NASA Astrophysics Data System (ADS)

The authors study a three parameters family of solutions of the Brans-Dicke field equations. They are static and spherically symmetric. The range of parameters is determined, for which this solution represents a black hole different from the Schwarzschild one. The authors find a subfamily of solutions which agrees with experiments and observations in the solar system. Consequences of the "no hair" theorems for black holes are discussed.

Lousto, C. O.; Campanelli, M.

34

Selective control of the symmetric Dicke subspace in trapped ions  

SciTech Connect

We propose a method of manipulating selectively the symmetric Dicke subspace in the internal degrees of freedom of N trapped ions. We show that the direct access to ionic-motional subspaces, based on a suitable tuning of motion-dependent ac Stark shifts, induces a two-level dynamics involving previously selected ionic Dicke states. In this manner, it is possible to produce, sequentially and unitarily, ionic Dicke states with increasing excitation number. Moreover, we propose a probabilistic technique to produce directly any ionic Dicke state assuming suitable initial conditions.

Lopez, C. E.; Retamal, J. C. [Departamento de Fisica, Universidad de Santiago de Chile, Casilla 307 Correo 2, Santiago (Chile); Solano, E. [Physics Department, ASC, and CeNS, Ludwig-Maximilians-Universitaet, Theresienstrasse 37, 80333 Munich (Germany); Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado 1761, Lima (Peru)

2007-09-15

35

John Henry--The Steel Driving Man  

ERIC Educational Resources Information Center

The story of John Henry provided the setting for sixth-grade class to participate in a John Henry Day of mathematics experiments. The students collected data from experiments where students competed against machines and technology. The student analyzed the data by comparing two box plots, a box plot of human data, and a box plot of machine or…

Murphy, David E.; Gulley, Laura L.

2005-01-01

36

JB-UIDS: an interactive UIMS based on OSF/motif  

NASA Astrophysics Data System (ADS)

This paper presents the principle, functions, features and implementation of a general graphical user interface management system based on OSF/Motif-JB-UIDS, which is a part of the integrated software engineering environment CASE (Computer Aided Software Engineering), named JB (Jade Bird). The visual and interactive UIMS can help the interface designer to generate user interface automatically and then refine it interactively. It adopts a new method of describing internal application interface based on Object-Oriented ideas to support the separation of user interface component from computational component. JB-UIDS has been implemented on SCO-ODT and has good portability and flexibility.

Chen, Min; Sun, Honghui; Dong, Shihai

1996-03-01

37

The Sir Henry Dryden Collection  

NSDL National Science Digital Library

Like many of his peers who were "to the manor born", Sir Henry Dryden was a 19th century Brit who was fascinated with archaeology and the world of antiquity. Before his death in 1899, he produced thousands of architectural and archaeological drawings based on the things he saw and studied during his travels around Britain and Europe. Recently, a consortium of institutions including the University College Northampton digitized a number of Dryden?s drawings, and subsequently placed them online here. Visitors can browse the materials by date, or by topics that include archaeology, arms and armor, and church architecture. The heraldry area within arms and armor is worth a look, as it contains some highly detailed renderings of various coats of arms and heraldic shields. Overall, the collection provides an interesting look into one man's passion for the built environment and the world of 19th century Britain.

2007-01-01

38

Electrically tunable Dicke effect in a double-ring resonator  

SciTech Connect

We study the finite-element method analysis of the Dicke effect using numerical simulations in an all-optical system of an optical waveguide side-coupled to two interacting ring resonators in a liquid crystal environment. The system is shown to exhibit all the signatures of the Dicke effect under active and reversible control by an applied voltage.

Cetin, A. E.; Muestecaplioglu, Oe. E. [Photonics Center and School of Electrical and Computer Engineering, Boston University, Boston, Massachusetts 02215 (United States); Department of Physics, Koc University, Sariyer, Istanbul 34450 (Turkey) and Institute of Quantum Electronics, ETH Zurich, Zurich 8093 (Switzerland)

2010-04-15

39

What We Talk around when We Talk about "The Dick"  

ERIC Educational Resources Information Center

Some years ago, the author had her first opportunity to teach an undergraduate American Romanticism course, which meant she had a chance to teach "Moby-Dick" the way she thought it should be taught. Meeting two days a week, her course was set up so that students read about thirty pages of "Moby-Dick" for one class meeting a week paired with…

Savage, Elizabeth

2011-01-01

40

Generalized Dicke nonequilibrium dynamics in trapped ions.  

PubMed

We explore trapped ions as a setting to investigate nonequilibrium phases in a generalized Dicke model of dissipative spins coupled to phonon modes. We find a rich dynamical phase diagram including superradiantlike regimes, dynamical phase coexistence, and phonon-lasing behavior. A particular advantage of trapped ions is that these phases and transitions among them can be probed in situ through fluorescence. We demonstrate that the main physical insights are captured by a minimal model and consider an experimental realization with Ca+ ions trapped in a linear Paul trap with a dressing scheme to create effective two-level systems with a tunable dissipation rate. PMID:24484012

Genway, Sam; Li, Weibin; Ates, Cenap; Lanyon, Benjamin P; Lesanovsky, Igor

2014-01-17

41

Generalized Dicke Nonequilibrium Dynamics in Trapped Ions  

NASA Astrophysics Data System (ADS)

We explore trapped ions as a setting to investigate nonequilibrium phases in a generalized Dicke model of dissipative spins coupled to phonon modes. We find a rich dynamical phase diagram including superradiantlike regimes, dynamical phase coexistence, and phonon-lasing behavior. A particular advantage of trapped ions is that these phases and transitions among them can be probed in situ through fluorescence. We demonstrate that the main physical insights are captured by a minimal model and consider an experimental realization with Ca+ ions trapped in a linear Paul trap with a dressing scheme to create effective two-level systems with a tunable dissipation rate.

Genway, Sam; Li, Weibin; Ates, Cenap; Lanyon, Benjamin P.; Lesanovsky, Igor

2014-01-01

42

Generation of Dicke states using adiabatic passage  

SciTech Connect

Entangled states of two ions are realized by using an adiabatic process. Based on the proposal by Linington and Vitanov [Phys. Rev. A 77, 010302 (2008)], we have generated Dicke states in optical qubits of two {sup 40}Ca{sup +} ions by applying frequency-chirped optical pulses with time-dependent envelopes to perform rapid adiabatic passage on sideband transitions. One of the biggest advantages of adiabatic approaches is their robustness against variations in experimental parameters, which is verified by performing experiments for different pulse widths or peak Rabi frequencies. Fidelities exceeding 0.5, which is the threshold for inseparable states, are obtained over wide ranges of parameter values.

Toyoda, K.; Watanabe, T.; Kimura, T.; Nomura, S.; Haze, S.; Urabe, S. [Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka (Japan)

2011-02-15

43

Cape Cod by Henry David Thoreau.  

National Technical Information Service (NTIS)

Shows the relationship between Henry Davis Thoreau, the poet, and Cape Cod. This film is intended for groups visiting Cape Cod, and for inclusion in the park's pre-visit educational package for schoolchildren.

1994-01-01

44

Thomas Henry Huxley and neuroscience.  

PubMed

In the latter decades of the nineteenth century Thomas Henry Huxley was at the heart of British Science: President of the British Association for the Advancement of Science (1870), President of the Royal Society (1883-86), Chairman of innumerable committees. His thought in many ways characterises the spirit of the 'high' Victorian age in Britain. He was not only the most eminent academic biologist of his time but also deeply interested in philosophical issues. His re-examination of the evolution of the brain in response to Richard Owen's 'telenomic' views formed the kernel of the notorious debate at the 1860 meeting of the British Association in Oxford. From his early youth until old age he thought long and hard about the mind/body problem. This paper follows the development of his ideas and shows how in debate with many of the leading thinkers of his age, in the X-club and the Metaphysical Society, he struggled to develop a biologically-based account of the relationship between mind and brain. However, at the end, he seems to have recognized that his position was not entirely satisfactory and ultimately famously confessing himself 'agnostic' turned from metaphysics to devote himself to more practical issues. The unresolved problems of mind and brain which perplexed Huxley remain to torment his epigoni. PMID:11640239

Smith, C U

1999-01-01

45

Composite vacuum Brans-Dicke wormholes  

NASA Astrophysics Data System (ADS)

We construct a new static spherically symmetric configuration composed of interior and exterior Brans-Dicke vacua matched at a thin matter shell. Both vacua correspond to the same Brans-Dicke coupling parameter ?; however, they are described by the Brans class I solution with different sets of parameters of integration. In particular, the exterior vacuum solution has Cext(?)?0. In this case the Brans class I solution for any ? reduces to the Schwarzschild one being consistent with restrictions on the post-Newtonian parameters following from recent Cassini data. The interior region possesses a strong gravitational field, and so the interior vacuum solution has Cint(?)=-1/(?+2). In this case the Brans class I solution describes a wormhole spacetime provided ? lies in the narrow interval -2-(3)/(3)

Sushkov, Sergey V.; Kozyrev, Sergey M.

2011-12-01

46

Obituary: Henry Emil Kandrup, 1955-2003  

NASA Astrophysics Data System (ADS)

Henry Emil Kandrup died on 18 October 2003 at his home in Gainesville Florida. Henry was a theoretical astrophysicist specializing in the application of chaotic dynamics to stellar systems. At the time of his death, Henry was a Professor at the University of Florida where he had taught for 13 years. Henry was born in Manhasset, New York on July 24, 1955 and spent most of his childhood in Great Neck. His parents, Jytte and Fred, were immigrants from Denmark where his father had worked as a silver smith. Henry was a precocious child, skipping both third and fifth grades. With the help of Sidney Spivack, a professor of sociology at Columbia University, his parents enrolled Henry in the Brooks Preparatory School in Andover, Massachusetts. After graduating at age 16, Henry enrolled at Cornell, transferring to Princeton the following year. Henry's parents adored their only child and worked hard to provide him with intellectual opportunities. Henry became an accomplished musician (organ, piano, French horn) and linguist (English, Danish, German) and was a passionate devotee of opera and ballet. Henry received his PhD in 1980 from the University of Chicago, where his thesis advisor was James Ipser. He taught at Oakland University in Michigan and Syracuse University in New York before coming to the University of Florida in 1990. Henry was sui generis. He shunned conventionality in his personal appearance and in his public demeanor, and always chose forthrightness and candor over polite silence. But to those of us who knew Henry well, his bluntness was a reflection of his intellectual consistency. Henry always said exactly what he thought, both in his published work and his public presentations, and never compromised himself for the sake of appearances. Nothing that he said or wrote was less than fully thought out. Henry's PhD thesis was entitled "Stochastic Problems in Stellar Dynamics," and most of his subsequent research was in this field. Motion in stellar systems can be stochastic for three reasons: deflection of trajectories by close encounters; non-integrability of the smoothed-out potential; and an oscillating mean field. Henry made important contributions to our understanding of all three sorts of chaos. In a series of papers from the early 1990's, Henry developed the idea of ``chaotic phase mixing," the process by which an ensemble of points evolves toward a uniform coarse-grained population of phase space. Prior to Henry's work, the evolution of stellar systems to a steady state was attributed loosely to "violent relaxation," defined as phase-space repopulation driven by changes in the smooth potential. Henry pointed out that changes in the gravitational potential do not by themselves constitute relaxation; at best, they can contribute to relaxation by inducing a degree of chaos in the stellar trajectories. But it is the chaos that is responsible for the mixing and hence for the approach to a steady state. Among his other important contributions to stellar dynamics were a formal demonstration of the equivalence of Landau damping and phase mixing, and a proof (with J. F. Sygnet) of the linear stability of a broad class of stellar systems. Shortly before his death, Henry was working on the chaotic dynamics of charged particle beams and on the influence of binary super massive black holes on orbital motion in galaxies. Henry was one of the principle organizers of more than a dozen workshops on non-linear dynamics in astronomy and astrophysics that were held at the University of Florida. At the time of his death, he was negotiating with Springer Verlag over publication of a monograph, Hamiltonian Galactic Dynamics. Henry was famous for the energetic quality of his lectures. Like many other excellent teachers, he drew upon his research to enliven his undergraduate teaching. Under Research Interests, his web site lists "creative utilization of playdough, margaritas, and spirographs in graduate and undergraduate teaching." Henry received numerous teaching citations and awards; he was consiste

Merritt, David; Gottesman, Stephen T.

2004-12-01

47

False vacuum decay in Jordan-Brans-Dicke cosmologies  

NASA Technical Reports Server (NTRS)

The bubble nucleation rate in a first-order phase transition taking place in a background Jordan-Brans-Dicke cosmology is examined. The leading order terms in the nucleation rate when the Jordan-Brans-Dicke field is large (i.e., late times) are computed by means of a Weyl rescaling of the fields in the theory. It is found that despite the fact that the Jordan-Brans-Dicke field (hence the effective gravitational constant) has a time dependence in the false vacuum at late times the nucleation rate is time independent.

Holman, Richard; Kolb, Edward W.; Vadas, Sharon L.; Wang, Yun; Weinberg, Erick J.

1989-01-01

48

Determination of Henry?s Law Constants Using Internal Standards with Benchmark Values  

EPA Science Inventory

It is shown that Henry?s law constants can be experimentally determined by comparing headspace content of compounds with known constants to interpolate the constants of other compounds. Studies were conducted over a range of water temperatures to identify temperature dependence....

49

Comment on the Jordan-Brands-Dicke universes  

NASA Astrophysics Data System (ADS)

It is shown that the recently obtained Jordan-Brans-Dicke solutions by Chauvet and Guzmán (1986) are either inconsistent, or only special power-law solutions derived previously by Lorenz-Petzold in various papers.

Lorenz-Petzold, D.

1987-06-01

50

Relaxing nucleosynthesis constraints on Brans-Dicke theories  

SciTech Connect

We reconsider constraints on Brans-Dicke theories arising from the requirement of successful big bang nucleosynthesis. Such constraints typically arise by imposing that the universe be radiation-dominated at early times, and therefore restricting the contribution that a Brans-Dicke scalar could make to the energy budget of the universe. However, in this paper we show how the dynamics of the Brans-Dicke scalar itself can mimic a radiation-dominated kinematics, thereby allowing successful nucleosynthesis with a sizable contribution to the total cosmic energy density. In other words Newton's constant may dynamically acquire values quite different from that today, even though the evolution mimics radiation domination. This possibility significantly relaxes the existing bounds on Brans-Dicke fields, and opens the door to new possibilities for early universe cosmology. The necessary fine tunings required by such an arrangement are identified and discussed.

De Felice, Antonio [Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH (United Kingdom); Department of Physics, Syracuse University, Syracuse, New York 13244-1130 (United States); Mangano, Gianpiero [INFN, Sezione di Napoli, and Dipartimento di Scienze Fisiche Universita di Napoli Federico II Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Naples (Italy); Serpico, Pasquale D. [Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, D-80805 Munich (Germany); Trodden, Mark [Department of Physics, Syracuse University, Syracuse, New York 13244-1130 (United States)

2006-11-15

51

Wormholes in the Brans-Dicke theory of gravitation  

NASA Astrophysics Data System (ADS)

It is shown that the static spherically symmetric solutions to the Brans-Dicke theory of gravitation give rise either to a naked singularity if the post Newtonian parameter ?<1 or to a wormhole if ?>1.

Agnese, A. G.; La Camera, M.

1995-02-01

52

Henry James Scholar's Guide to Web Sites  

NSDL National Science Digital Library

Maintained and created by Richard Hathaway, an educator at the State University of New York at New Paltz, this site is a compendium of links and writings by and about the American writer Henry James. The site begins with a collection of electronic texts of James' works. Some of the more recent additions include short stories that James wrote specifically for The Atlantic Monthly during the 1860s. While the site cannot be searched in its entirety, a table of contents provides some assistance for those hoping to navigate its sections. The contents include such topics as Henry James conferences, Finding other etexts, The Henry James E-Journal, and an on-line discussion group. The section dealing with writings by and about James will be of great interest to scholars and students, as it includes links to study guides and musings on his great works by other noted authors and scholars.

Hathaway, Richard D.

53

Paenibacillus polymyxa JB05-01-1 and its perspectives for food conservation and medical applications.  

PubMed

The aim of this study was to isolate a novel bacterial strain with strong and broad spectrum antibacterial activity from a livestock feed prebiotic supplement. A novel strain, termed Paenibacillus polymyxa JB05-01-1, was isolated using traditional microbiological methods and identified on the basis of its phenotypic and biochemical properties as well as its 16S rRNA gene sequence. This strain was able to inhibit growth of gram-negative bacteria including Escherichia coli RR1, Pseudomonas fluorescens R73, Pantoea agglomerans BC1, Butyrivibrio fibrisolvens OR85, and Fibrobacter succinogenes. The above antagonism against the aforementioned bacteria was attributed to production of an antimicrobial substance(s) termed "JB05-01-1." Its production was optimal during the stationary phase. JB05-01-1 has a molecular weight of 2.5 KDa, its mode of action is bactericidal, and the divalent cations, Ca(2+) and Mn(2+), reduced its lethality. The antibacterial activity was heat-stable and was effective at a pH range of 2-9. Enzymes like trypsin, ?-chymotrypsin, and proteinase K have abolished the antibacterial activity of JB05-01-1 indicating a proteinaceous motif. This type of naturally occurring bacteria and inhibitory substance(s) could represent an additional value in livestock feed supplements. The natural presence of antibacterial activity indicates an opportunity to decrease the addition of antibiotics. PMID:21132276

Naghmouchi, Karim; Paterson, Lyn; Forster, Bob; McAllister, Tim; Ohene-Adjei, Sam; Drider, Djamel; Teather, Ron; Baah, John

2011-03-01

54

Degradation ofMono-,Di, andTrihalogenated Benzoic Acids byPseudomonas aeruginosa JB2  

Microsoft Academic Search

2,3-dichlorobenzoate-, 2,5-dichlorobenzoate-. Whilechlorocatechols wereoxidized bythe mutants atwild-type levels, oxidation of2-chloro- and2,3-and2,5-dichlorobenzoates wassubstantially diminished. Thesefindings suggested thatstrain JB2possessed, inaddition tothebenzoate dioxygenase, a halobenzoate dioxygenase thatwasnecessary forthedegradation ofchlorobenzoates substituted intheortho position.

W. J. HICKEYtAND; D. D. FOCHT

55

Degradation of mono-, di-, and trihalogenated benzoic acids by Pseudomonas aeruginosa JB2.  

PubMed

Pseudomonas aeruginosa JB2 was isolated from a polychlorinated biphenyl-contaminated soil by enrichment culture containing 2-chlorobenzoate as the sole carbon source. Strain JB2 was subsequently found also to grow on 3-chlorobenzoate, 2,3- and 2,5-dichlorobenzoates, 2,3,5-trichlorobenzoate, and a wide range of other mono- and dihalogenated benzoic acids. Cometabolism of 2,4-dichlorobenzoate was also observed. Chlorocatechols were the central intermediates of all chlorobenzoate catabolic pathways. Degradation of 2-chlorobenzoate was routed through 3-chlorocatechol, whereas 4-chlorocatechol was identified from the metabolism of both 2,3- and 2,5-dichlorobenzoate. The initial attack on chlorobenzoates was oxygen dependent and most likely mediated by dioxygenases. Although plasmids were not detected in strain JB2, spontaneous mutants were detected in 70% of glycerol-grown colonies. The mutants were all of the following phenotype: benzoate+, 3-chlorobenzoate+, 2-chlorobenzoate-, 2,3-dichlorobenzoate-, 2,5-dichlorobenzoate-. While chlorocatechols were oxidized by the mutants at wild-type levels, oxidation of 2-chloro- and 2,3- and 2,5-dichlorobenzoates was substantially diminished. These findings suggested that strain JB2 possessed, in addition to the benzoate dioxygenase, a halobenzoate dioxygenase that was necessary for the degradation of chlorobenzoates substituted in the ortho position. PMID:2128010

Hickey, W J; Focht, D D

1990-12-01

56

Tablet PCs in Engineering Mathematics Courses at the J.B. Speed School of Engineering  

ERIC Educational Resources Information Center

In fall 2007, J.B. Speed School of Engineering at the University of Louisville joined the ranks of universities requiring the purchase of Tablet PCs for all new entering students. This article presents a description of how the Department of Engineering Fundamentals incorporated Tablet PCs into their instruction, a review of the literature…

Hieb, Jeffrey L.; Ralston, Patricia A. S.

2010-01-01

57

William Henry: His Achievements and His Law  

Microsoft Academic Search

Henry is well-known name to all students of physical chemistry. Despite physical handicaps resulting from a childhood accident, he went on to a brilliant career in chemistry and medicine. The extensive and careful measurements that he made of the solubility of gases have given us the law that carries his name. Not many are familiar with his work on the

Jaime Wisniak

2001-01-01

58

The Ideas of Henry Jenkins and Libraries  

ERIC Educational Resources Information Center

Henry Jenkins, director of the Comparative Media Studies Program at the Massachusetts Institute of Technology and keynote speaker at the 2007 American Library Association's "Gaming, Learning and Libraries Symposium" in Chicago is a visionary leader in the areas of new media and media convergence. In a white paper on digital media and learning…

Anderson, Byron

2008-01-01

59

Henry M. Dunham, a Boston Classic  

Microsoft Academic Search

The project proposes to research and record selected musical works of Brockton area composer Henry M. Dunham (1953-1929). Dunham was a professor of organ at the New England Conservatory of Music in the late nineteenth and early twentieth centuries. His music has remained in some obscurity for many years and has not been recorded. The proposed project would entail detailed

Steven Young

2007-01-01

60

Henry J. Thompson, PhD  

Cancer.gov

Dr. Henry J. Thompson is professor in the College of Agricultural Sciences and director of the Cancer Prevention Laboratory at Colorado State University in Fort Collins, Colorado. Dr. Thompson is a member of the American Association for Cancer Research and the American Society for Nutritional Sciences.

61

In the Style of Henry Moore  

ERIC Educational Resources Information Center

In this article, the author describes an art project inspired by Henry Moore's sculptures. This project consists of two activities. In the first activity, students select, sand and stain a wood block that would become a base for their plaster sculpture. This activity would keep the students independently engaged (classroom management) while the…

Hinshaw, Craig

2010-01-01

62

Henri Matisse's "Beasts of the Sea"  

ERIC Educational Resources Information Center

Henri Matisse (1869-1954) was a very prolific Impressionist/Post-Impressionist artist whose longevity allowed him to produce many wonderful, brightly colored pieces of art that spanned different styles, movements and media. Elementary-school children love color and appreciate any project that does not require their work to be exact or totally…

Graff, Robert

2010-01-01

63

Livres d'Artiste: Henri Matisse, Jazz.  

ERIC Educational Resources Information Center

Outlines the life of Henri Matisse and how he created his paper cut-outs, which were reproduced in a book. Discusses the importance of artists' books. Suggests some creative activities for all grades in book making and paper cut-outs that could be worked in conjunction with a language arts program. (KM)

Godlewski, Susan Glover

1990-01-01

64

Inverse temperature dependence of Henry’s law coefficients for volatile organic compounds in supercooled water  

Microsoft Academic Search

Upon supercooling, water expels volatile organic compounds (VOC), and Henry’s law coefficients are increasing concomitant with decreasing temperature. This unexpected observation was found by measuring the VOC partitioning between supercooled water and gas phase in the temperature range from ?5°C to ?15°C for benzene, toluene, ethlybenzene, m-, p-, o-xylenes (BTEX), methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE). Aqueous

Karsten Sieg; Elena Starokozhev; Martin U. Schmidt; Wilhelm Püttmann

2009-01-01

65

Cosmological Constraints on Brans-Dicke Theory  

NASA Astrophysics Data System (ADS)

We report strong cosmological constraints on the Brans-Dicke (BD) theory of gravity using cosmic microwave background data from Planck. We consider two types of models. First, the initial condition of the scalar field is fixed to give the same effective gravitational strength Geff today as the one measured on Earth, GN. In this case, the BD parameter ? is constrained to ?>692 at the 99% confidence level, an order of magnitude improvement over previous constraints. In the second type, the initial condition for the scalar is a free parameter leading to a somewhat stronger constraint of ? >890, while Geff is constrained to 0.981

Avilez, A.; Skordis, C.

2014-07-01

66

General class of vacuum Brans-Dicke wormholes  

SciTech Connect

Recently, traversable wormhole geometries were constructed in the context of f(R) gravity. The latter is equivalent to a Brans-Dicke theory with a coupling parameter {omega}=0, which is apparently excluded from the narrow interval, -3/2<{omega}<-4/3, extensively considered in the literature of static wormhole solutions in vacuum Brans-Dicke theory. However, this latter interval is only valid for a specific choice of an integration constant of the field equations derived on the basis of a post-Newtonian weak field approximation, and there is no reason for it to hold in the presence of compact objects with strong gravitational fields. In this context, we construct a general class of vacuum Brans-Dicke wormholes that include the value of {omega}=0.

Lobo, Francisco S. N.; Oliveira, Miguel A. [Centro de Astronomia e Astrofisica da Universidade de Lisboa, Campo Grande, Ed. C8 1749-016 Lisboa (Portugal)

2010-03-15

67

Henri Laborit and the inhibition of action.  

PubMed

Henri Laborit was one of the founders of modern neuropsychopharmacology, having discovered, or participated in, the discovery of chlorpromazine, gamma-OH, clomethiazole, and minaprine. He also put forward a theory regarding the necessity of counteracting the negative consequences of defense mechanisms during anesthesia or behavioral inhibition. The scope of his work covers neurophysiology, pharmacology, psychiatry, and psychosomatics. His independence of spirit meant that most of his research was not done within university settings. PMID:24733976

Kunz, Edward

2014-03-01

68

Did Henry Ford Pay Efficiency Wages?  

Microsoft Academic Search

The authors examine Henry Ford's introduction of the five-dollar day in 1914 in an effort to evaluate the relevance of efficiency-wag e theories of wage and employment determination. They conclude that t he Ford experience strongly supports the relevance of these theories. Ford's decision to increase wages dramatically is most plausibly the consequence of labor problems of the kind efficiency-wage

Daniel M. G. Raff; Lawrence H. Summers

1987-01-01

69

Static Perfect Fluid in Brans-Dicke Theory  

NASA Astrophysics Data System (ADS)

The static perfect fluid in Brans-Dicke theory with spherical symmetry and conformal flatness leads to a differential equation in terms of the scalar field only. We obtain a unique exact solution for the case p= ??, but density and pressure are singular at the center. We further consider the metric corresponding to a static nonrotating space-time with two mutually orthogonal spacelike Killing vectors in Brans-Dicke theory. We obtain a differential equation involving only the scalar field for the equation of state p= ?? The general solution is found as a transcendental function. Finally, we generalize a theorem given by Bronnikov and Kovalchuk (1979) for perfect fluid in Einstein's theory.

Banerjee, A.; Santos, N. O.

1981-05-01

70

Paenibacillus polymyxa JB05-01-1 and its perspectives for food conservation and medical applications  

Microsoft Academic Search

The aim of this study was to isolate a novel bacterial strain with strong and broad spectrum antibacterial activity from a\\u000a livestock feed prebiotic supplement. A novel strain, termed Paenibacillus polymyxa JB05-01-1, was isolated using traditional microbiological methods and identified on the basis of its phenotypic and biochemical\\u000a properties as well as its 16S rRNA gene sequence. This strain was

Karim Naghmouchi; Lyn Paterson; Bob Forster; Tim McAllister; Sam Ohene-Adjei; Djamel Drider; Ron Teather; John Baah

2011-01-01

71

Experimental realization of Dicke states of up to six qubits for multiparty quantum networking.  

PubMed

We report the first experimental generation and characterization of a six-photon Dicke state. The produced state shows a fidelity of F=0.56+/-0.02 with respect to an ideal Dicke state and violates a witness detecting genuine six-qubit entanglement by 4 standard deviations. We confirm characteristic Dicke properties of our resource and demonstrate its versatility by projecting out four- and five-photon Dicke states, as well as four-photon Greenberger-Horne-Zeilinger and W states. We also show that Dicke states have interesting applications in multiparty quantum networking protocols such as open-destination teleportation, telecloning, and quantum secret sharing. PMID:19659190

Prevedel, R; Cronenberg, G; Tame, M S; Paternostro, M; Walther, P; Kim, M S; Zeilinger, A

2009-07-10

72

Geometric measure of quantum discord for superpositions of Dicke states  

Microsoft Academic Search

The pairwise quantum correlations of symmetric multi-qubit states are studied by using the geometric measure of quantum discord (GMQD). The explicit expressions of the GMQD for the Dicke states and their superpositions are given. By comparing the GMQD with quantum discord, we conclude that they display similar behaviour. From the results, we know that most of the states we have

Xiaolei Yin; Zhengjun Xi; Xiao-Ming Lu; Zhe Sun; Xiaoguang Wang

2011-01-01

73

Using Herman Melville's "Moby-Dick" to Explore Geographic Themes  

ERIC Educational Resources Information Center

The classic American novel, Herman Melville's "Moby-Dick", can be used in geography and English classes at the high school and college levels to explore five themes that have a geographic component or are of interest to geography students: (1) the journey, (2) human/environment interactions, (3) social relationships in space, (4) acquiring…

Gesler, Wil

2004-01-01

74

Author! Author! The Gallant Children's Author: Dick King-Smith  

ERIC Educational Resources Information Center

This column presents a brief biography of Dick King-Smith. Born on March 27, 1922 and raised in Gloucestershire, England, he grew up with animals of all kinds. King-Smith was a farmer for twenty years and then became a school teacher. He was also a soldier during wartime, a traveling salesman, shoe factory worker, and television presenter. He…

Brodie, Carolyn S.

2005-01-01

75

Brans–Dicke theory in the local potential approximation  

NASA Astrophysics Data System (ADS)

We study the Brans–Dicke theory with arbitrary potential within a functional renormalization group framework. Motivated by the asymptotic safety scenario of quantum gravity and by the well-known relation between f(R) gravity and Brans–Dicke theory at the classical level, we concentrate our analysis on the fixed-point equation for the potential in four dimensions and with Brans–Dicke parameter \\omega =0. For two different choices of gauge, we study the resulting equations by examining both the local and global properties of the solutions, by means of analytical and numerical methods. As a result of our analysis we do not find any nontrivial fixed point in one gauge, but we find a continuum of fixed points in the other one. We interpret such an inconsistency as a result of the restriction to \\omega =0, and thus we suggest that it indicates a failure of the equivalence between f(R) gravity and Brans–Dicke theory at the quantum level.

Benedetti, Dario; Guarnieri, Filippo

2014-05-01

76

Static vacuum solutions of Brans-Dicke theory with torsion  

NASA Astrophysics Data System (ADS)

The static spherically symmetric solutions of the modified Brans-Dicke theory with torsion field are obtained for the vacuum case. It is shown that torsion fields are determined by the scalar field even if spin angular momentum does not exist.

Kim, Sung-Won; Cho, Byung Ha

1987-09-01

77

Whitrow-Randall's relation and Brans-Dicke cosmology  

NASA Astrophysics Data System (ADS)

When Brans and Dicke published their alternative gravitational framework, they proved that it led to Machian solutions in the static case, and for a pressureless (dust) Euclidean universe. We extend their demonstration to Euclidean and non-Euclidean models with non-null pressure, employing the perfect fluid model. We find? andp both ?G.

Berman, M. S.; Som, M. M.

1990-06-01

78

Religion as a Quest for Wholeness: Melville's Moby-Dick  

ERIC Educational Resources Information Center

Author attempted to indicate the ways in which Melville's novel, Moby-Dick, may be understood as a concrete embodiment of the religious quest, and as a set of clues about ways in which the language of a quest may finally be transcended. (Author/RK)

Vaught, Carl G.

1974-01-01

79

The Truth of the Thing: Nonfiction in "Moby Dick"  

ERIC Educational Resources Information Center

Looks at Melville's narrative construction of "onion-like...layers of truth" that combine romance and textbook, presents critics' discussion and scholars' treatment of the cetological information present in the text, offers an explanation for the lack of recognition due to the nonfictional parts of "Moby Dick." (JK)

Hilbert, Betsy

1986-01-01

80

Brans-Dicke gravity theory from topological gravity  

NASA Astrophysics Data System (ADS)

We consider a model that suggests a mechanism by which the four dimensional Brans-Dicke gravity theory may emerge from the topological gravity action. To achieve this goal, both the Lie algebra and the symmetric invariant tensor that define the topological gravity Lagrangian are constructed by means of the Lie algebra S-expansion procedure with an appropriate abelian semigroup S.

Inostroza, C.; Salazar, A.; Salgado, P.

2014-06-01

81

TEACHING "MOBY DICK," A METHOD AND AN APPROACH.  

ERIC Educational Resources Information Center

"MOBY DICK" IS SINGULARLY APPROPRIATE FOR HIGH SCHOOL STUDENTS IN ITS PHILOSOPHICAL, PSYCHOLOGICAL, AND SOCIAL EMPHASIS. HOWEVER, TO GUIDE THE STUDENTS INTO THE THEMATIC INTRICACIES OF THE WORK, THE TEACHER MUST USE A CAREFULLY PLANNED, INDUCTIVE APPROACH THAT DEMANDS CLOSE TEXTUAL STUDY IN CLASS. ALTHOUGH EACH TEACHER SHOULD CONCENTRATE ON THE…

JOSEPHS, LOIS

82

Nonclassical effects in a highly nonlinear generalized homogeneous Dicke model  

SciTech Connect

An intensity dependent nonlinear coupling model of N two-level atoms (generalized Dicke model) interacting dispersively with a bimodal cavity field via two-photon transitions is investigated in a scenario where the rotating wave approximation is assumed. The model becomes homogeneous in the sense that the spin transition frequency is the same for all atoms and the coupling constants emerging from the collective interactions of the atomic system with the cavity field depend only on the particular radiation field mode. This allows us to represent the Dicke Hamiltonian entirely in terms of the total angular momentum J. It is assumed that, initially, the atomic system and the field are in a disentangled state where the field modes are in Glauber coherent states and the atomic system is a superposition of states |JM> (Dicke states). The model is numerically tested against simulations of normal squeezing variance of the field, squeezing factors based on the Heisenberg uncertainty principle, along with the statistical properties of the light leading to the possible production of nonclassical effects, such as degree of second-order coherence in the modes, degree of intermode correlation, as well as violation of the Cauchy-Schwartz inequality. Analytical expression of the total density operator matrix elements at t>0 shows the present nonlinear model to be strongly entangled, which is reflected in the time evolution of the linear entropy, where the superposition states are reduced to statistical mixtures. Thus, the present generalized Dicke model does not preserve the modulus of the Bloch vector. The computations, performed in the weak coupling and strong field limits, were conducted via second-order Dyson perturbative expansion of the time evolution operator matrix elements for the totality of the angular momentum states of the atomic system. - Highlights: > The present highly nonlinear generalized Dicke model involves two-photon transitions. > Quantum coherences significantly affect the dynamics of the atomic system. > At t>0 the time-dependent density operator matrix becomes strongly entangled. > Linear entropy shows that the superposition states turn into statistical mixtures. > The present Dicke model does not preserve the modulus of the Bloch vector.

Grinberg, Horacio, E-mail: grinberg@df.uba.ar

2011-11-15

83

Development of a New Shielding Model for JB-Line Dose Rate Calculations  

SciTech Connect

This report describes the shielding model development for the JB-Line Upgrade project. The product of this effort is a simple-to-use but accurate method of estimating the personnel dose expected for various operating conditions on the line. The current techniques for shielding calculations use transport codes such as ANISN which, while accurate for geometries which can be accurately approximated as one dimensional slabs, cylinders or spheres, fall short in calculating configurations in which two-or three-dimensional effects (e.g., streaming) play a role in the dose received by workers.

Buckner, M.R.

2001-08-09

84

Professor Henry, Mr. Faraday, and the Hunt for Electromagnetic Induction  

NASA Astrophysics Data System (ADS)

On different sides of the Atlantic but about the same time, Michael Faraday and Joseph Henry announced success in a quest that had preoccupied the scientific community for a decade: coaxing electricity from magnetism. "Mutual induction," what Faraday and Henry had identified in the early 1830s, would turn out to be not only a foundational concept in the physics of electricity and magnetism but also the principle behind the technology of electrical transformers and generators--two mainstays of industrialization. Although Faraday's breakthrough in London and Henry's in Albany might appear to be classic examples of "independent discovery," they were not. The two natural philosophers shared a similar orientation toward their research and, moreover, a distinctive laboratory instrument: Henry's new, powerful electromagnet. Thus, the story of Henry's and Faraday's search for induction illuminates not only the workings of Victorian science but also the crucial part that an instrument--the unadorned hardware--can play in scientific inquiry. Albert Moyer takes this story from his biography of Joseph Henry that Smithsonian Institution Press is about to publish in commemoration of the 200th anniversary of Henry's birth. The biography focuses on Henry's early and middle years, 1797-1847, from his emergence as America's foremost physical scientist to his election as the Smithsonian Institution's first director.

Moyer, Albert E.

1997-04-01

85

Guy V. Henry: A Study in Military Leadership.  

National Technical Information Service (NTIS)

This thesis is a biography of Brig Gen Guy V. Henry, Sr. General Henry, a model soldier, who served as a commissioned officer from 1861 through 1899. He commanded a Union brigade in the Civil War, actively participated in several of the most significant c...

M. R. Erlandson

1985-01-01

86

Lou Henry Hoover: The Independent Girl. A Curriculum Guide.  

ERIC Educational Resources Information Center

This curriculum guide provides ideas for teaching about Lou Henry Hoover, wife of President Herbert Hoover. The book examines personal data, as well as the social milieu of the times of the Hoover's. Teaching suggestions accompany the chapters. There are 12 chapters in the guide: (1) "Timeline, Biographical Sketch, and Photographs of Lou Henry…

Kurtz, Alice K.

87

Memory Drum Theory's C Movement: Revelations from Franklin Henry  

ERIC Educational Resources Information Center

Franklin Henry's "memory drum" theory of neuromotor reaction (Henry & Rogers, 1960) was one of the most influential studies of the response programming stage of information processing. The paper is the most-cited study ever published in the "Research Quarterly for Exercise and Sport." However, few people know there is a noteworthy error in the…

Fischman, Mark G.; Christina, Robert W.; Anson, J. Greg

2008-01-01

88

Henry Hudson Bridge over Harlem River Shipping Canal at confluence ...  

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

Henry Hudson Bridge over Harlem River Shipping Canal at confluence with Hudson River, from Isham Park, view northeast. Inwood Hill Park on left, Spuyten Duyvil Shorefront Park on right, Palisades Interstate Park in background. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

89

Teaching Students about the Environment with Henry David Thoreau  

ERIC Educational Resources Information Center

"Walden: The Ballad of Thoreau" is a two-act four-character play about the final two days writer Henry David Thoreau spent in his cabin before leaving Walden Pond. Teachers can use this play to teach about preserving the earth to students. This article presents a brief synopsis of the play and a brief biography of Henry David Thoreau.

Curriculum Review, 2008

2008-01-01

90

Brans-Dicke theory and the Pioneer anomaly  

NASA Astrophysics Data System (ADS)

Scalar-tensor theory offers the possibility of a modification of Newtonian gravity due to the presence of a 4d scalar dilaton field. The prototypical version of such a theory, massless Brans-Dicke theory, is considered here in the Einstein frame representation. The acceleration of a test mass is obtained from the exact 4d Xanthopoulos-Zannias solutions with spherical symmetry. The deviation of this acceleration from the pure Newtonian gravitational acceleration is examined to see if it can account for the anomalous Pioneer acceleration, while satisfying solar system constraints. Theoretical considerations, along with limits inferred from Pioneer 10 data, suggest that Brans-Dicke gravity could account for no more than a small fraction of the Pioneer anomaly, so that a complete explanation of the anomaly must lie elsewhere.

Anderson, John D.; Morris, J. R.

2012-09-01

91

Dicke Phase Transition with Multiple Superradiant States in Quantum Chaotic Resonators  

NASA Astrophysics Data System (ADS)

We experimentally investigate the Dicke phase transition in chaotic optical resonators realized with two-dimensional photonics crystals. This setup circumvents the constraints of the system originally investigated by Dicke and allows a detailed study of the various properties of the superradiant transition. Our experimental results, analytical prediction, and numerical modeling based on random-matrix theory demonstrate that the probability density P(?) of the resonance widths provides a new criterion to test the occurrence of the Dicke transition.

Liu, C.; Di Falco, A.; Fratalocchi, A.

2014-04-01

92

Nonclassical effects in a highly nonlinear generalized homogeneous Dicke model  

NASA Astrophysics Data System (ADS)

An intensity dependent nonlinear coupling model of N two-level atoms (generalized Dicke model) interacting dispersively with a bimodal cavity field via two-photon transitions is investigated in a scenario where the rotating wave approximation is assumed. The model becomes homogeneous in the sense that the spin transition frequency is the same for all atoms and the coupling constants emerging from the collective interactions of the atomic system with the cavity field depend only on the particular radiation field mode. This allows us to represent the Dicke Hamiltonian entirely in terms of the total angular momentum J. It is assumed that, initially, the atomic system and the field are in a disentangled state where the field modes are in Glauber coherent states and the atomic system is a superposition of states |JM> (Dicke states). The model is numerically tested against simulations of normal squeezing variance of the field, squeezing factors based on the Heisenberg uncertainty principle, along with the statistical properties of the light leading to the possible production of nonclassical effects, such as degree of second-order coherence in the modes, degree of intermode correlation, as well as violation of the Cauchy-Schwartz inequality. Analytical expression of the total density operator matrix elements at t>0 shows the present nonlinear model to be strongly entangled, which is reflected in the time evolution of the linear entropy, where the superposition states are reduced to statistical mixtures. Thus, the present generalized Dicke model does not preserve the modulus of the Bloch vector. The computations, performed in the weak coupling and strong field limits, were conducted via second-order Dyson perturbative expansion of the time evolution operator matrix elements for the totality of the angular momentum states of the atomic system.

Grinberg, Horacio

2011-11-01

93

Nonequilibrium Quantum Phase Transitions in the Dicke Model  

NASA Astrophysics Data System (ADS)

We establish a set of nonequilibrium quantum phase transitions in the Dicke model by considering a monochromatic nonadiabatic modulation of the atom-field coupling. For weak driving the system exhibits a set of sidebands which allow the circumvention of the no-go theorem which otherwise forbids the occurrence of superradiant phase transitions. At strong driving we show that the system exhibits a rich multistable structure and exhibits both first- and second-order nonequilibrium quantum phase transitions.

Bastidas, V. M.; Emary, C.; Regler, B.; Brandes, T.

2012-01-01

94

Transfer of the Pea Symbiotic Plasmid pJB5JI in Nonsterile Soil †  

PubMed Central

Transfer of the pea (Pisum sativum L.) symbiotic plasmid pJB5JI between strains of rhizobia was examined in sterile and nonsterile silt loam soil. Sinorhizobium fredii USDA 201 and HH003 were used as plasmid donors, and symbiotic plasmid-cured Rhizobium leguminosarum 6015 was used as the recipient. The plasmid was carried but not expressed in S. fredii strains, whereas transfer of the plasmid to R. leguminosarum 6015 rendered the recipient capable of nodulating pea plants. Confirmation of plasmid transfer was obtained by acquisition of plasmid-encoded antibiotic resistance genes, nodulation of pea plants, and plasmid profiles. Plasmid transfer in nonsterile soil occurred at frequencies of up to 10?4 per recipient and appeared to be highest at soil temperatures and soil moisture levels optimal for rhizobial growth. Conjugation frequencies were usually higher in sterile soil than in nonsterile soil. In nonsterile soil, transconjugants were recovered only with strain USDA 201 as the plasmid donor. Increasing the inoculum levels of donor and recipient strains up to 109 cells g of soil?1 increased the number of transconjugants; peak plasmid transfer frequencies, however, were found at the lower inoculum level of 107 cells g of soil?1. Plasmid transfer frequencies were raised in the presence of the pea rhizosphere or by additions of plant material. Transconjugants formed by the USDA 201(pJB5JI) × 6015 mating in soil formed effective nodules on peas. Images

Kinkle, Brian K.; Schmidt, Edwin L.

1991-01-01

95

Online Calendar Henry James's Letters and A Biographical Register of Henry James's Correspondents  

NSDL National Science Digital Library

Hosted by the University of Nebraska Press and created by Steven H. Jobe and Susan E. Gunter, this site offers information on all known letters written by novelist Henry James (more than 10,500) and brief biographical information on the (more than 1,000) recipients of these letters. Users can search the database by date, correspondent, repository, or keyword. Search returns include the date and place of the letter's composition, the addressee's name and identity, the publication source, and the repository in which the letter is held. The site also features comprehensive lists of all published sources of the letters and the more than 130 repositories and private collections where they are held, and statistics on the letters and correspondents. Henry James scholars will quickly find this site to be an invaluable research tool.

Gunter, Susan E.; Jobe, Steven H.

96

The Writings of Henry D. Thoreau  

NSDL National Science Digital Library

Henry David Thoreau is widely considered one of the most important persons in the history of American letters in addition to an international reputation as a naturalist, philosopher, and author. This particular website serves as both a source of information about the authorized Thoreau Edition of his complete works (which was founded in 1966) and the Thoreau Project, which is located at Northern Illinois University, and which is supported by the National Endowment for the Humanities. On the site, visitors can learn about the life and times of Thoreau, read a series of reflections on his book, Walden, and learn about future volumes in the Thoreau Edition. The section dedicated to Thoreau's various writings is quite delightful, as visitors can view original samples of his handwriting, peruse selections from his celebrated journal (which he kept from 1837 to 1861), and view a complete list of his letters, which he composed from 1835 to 1862.

97

Obituary: Henry Albers (1925-2009)  

NASA Astrophysics Data System (ADS)

Henry Albers, professor of astronomy at Vassar College for over thirty years, died March 29, 2009, in Fairhope, Alabama. For his work at Vassar, where he held the Maria Mitchell Chair, Albers received the first Maria Mitchell Women in Science Award for his inspiration of women astronomers. He said "In the final analysis it is the students who bring the joy into teaching." As a professional astronomer, Albers did observational work on Galactic structure in the southern Milky Way, and on the structure of the Magellanic Clouds. In retirement, Albers published Maria Mitchell - A Life in Journals and Letters, the firsthand account of America's first woman astronomer. Albers's research was on photographic near-infrared spectroscopy of red giant stars in the southern Milky Way, some proper motion studies, and on the structure of the Magellanic Clouds. A series of seven NSF grants supported his six trips to Chile to make spectroscopic observations, as well as his sabbatical collaborations at Minnesota, Leiden, and the Royal Observatory in Edinburgh. Henry Albers arrived at Vassar in 1958, to find an astronomy program that had been recently absorbed by the physics department, and that was suffering neglect after the retirement of Maud Makemson. For the next 31 years, with incredible energy -- he sometimes taught seven courses a year -- he built the astronomy program into one double in size (from one to two tenure lines), whose th century facilities have been replaced with a st century observatory. For a remarkable stretch of 20-some-years, Albers and physicist Bob Stearns, with considerable grace, alternated chairmanship of the joint department of physics and astronomy. Henry Albers was a devoted citizen of Vassar College and an enthusiastic participant in the process of faculty governance at that institution. He would have been the first to concede that his enthusiasm was sometimes excessive, and that his contributions at faculty meetings occasionally failed to move the discussion forward. Before more than one meeting, he was known to make a note to himself on his copy of the agenda, which read, in large block letters: "shut up." Fortunately, Albers was seldom able to repress his concern for the College or his dedication to its improvement. He served on all major committees and most minor ones as well. For example, he chaired a committee that eventually got telephones in faculty offices, another that lobbied for establishment of an academic computing center, and another that constructed Vassar's system of post-tenure review of senior faculty. It was Henry Albers who introduced the motion on the floor of the faculty, which passed by a vote of 100 to 2, moving that Vassar College accept coeducation. Albers was a caring mentor and although fundamentally compassionate, had a somewhat prankish sense of humor - unfailingly directed at the most pompous targets in sight. Although deeply dedicated to the College, Albers had an admirable ability to disengage from his life at Vassar. He regularly spent college breaks as the resident astronomer on cruise ships. Every May, he would celebrate his last class by sharing a jug of wine in the faculty commons with his regular lunchtime group. After retiring in 1989, he continued his hobbies of gardening, painting, and choral singing, but also immediately began work as a math and science volunteer in the local public schools on Cape Cod. He completed his final scholarly project, his edition of the Letters and Journals of Maria Mitchell, in 2002.

Chromey, Fred

2011-12-01

98

Brans-Dicke theory of gravity with torsion: A possible solution of ?-problem  

NASA Astrophysics Data System (ADS)

We study the Brans-Dicke theory of gravity in Riemann-Cartan space-times and obtain general torsion solutions, which are completely determined by the Brans-Dicke scalar field ?, in the false- vacuum-energy-dominated epoch. The substitution of the torsion solutions back to our action gives the original Brans-Dicke action with ?-dependent Brans-Dicke parameter ?(?). The evolution of ?(?) during the inflation is studied and it is found that ? approaches infinity at the end of inflation. This may solve the ?-problem in the extended inflation model.

Wu, Yu-Huei; Wang, Chih-Hung

2012-12-01

99

Obituary: Richard L. (Dick) Walker, Jr., 1938-2005  

NASA Astrophysics Data System (ADS)

Dick Walker, 67, died 30 March 2005 in Flagstaff, AZ, following a long illness. He was born on 9 March 1938 in Hampton, Iowa and grew up in Waterloo, Iowa. As a child, Dick was fascinated with astronomy and built his own telescope. He saved his pennies and bought and read every book on the subject he could find. He also raised pigeons, naming four of them Hertzsprung, Hoyle, Gamow, and Kron. In 1957, the year Sputnik was launched, Dick began his college studies at the University of Northern Iowa in Cedar Falls. In 1959, he transferred to the State University of Iowa (subsequently renamed the University of Iowa) in Iowa City, where he earned a BA degree in astronomy and physics in 1963. He joined the staff of the U.S. Naval Observatory in Washington, DC, where he worked in the Time Service Division for a year before his assignment to the Astrometry and Astrophysics Division. Dick relocated to Flagstaff, AZ, in 1966 to continue his Naval Observatory service at the Flagstaff Station. His retirement in May 1999, ended a thirty-six-year career with USNO. Dick was first and foremost an observational astronomer. From the mid 1960s through the late 1970s, much of Dick's time was devoted to the measurement of binary stars, observing with the 12-inch and 26-inch refractors in Washington and later the 40-inch and 61-inch reflectors in Flagstaff. He also made many trips to Lick Observatory to work with the 36-inch Clark Refractor there. During this time he consulted with Charles Worley, who was observing on the 26-inch, to make sure time was well-spent examining doubles that could not be observed in Washington. This period of observing overlapped with the early years of speckle interferometry, and Dick's observations, made with the largest telescope used for micrometry at the time, were very important for ascertaining the veracity of this new technique. He was a studious and very careful observer of doubles and made over 8,000 measures, resulting in almost 3,000 mean positions. While measuring known systems for orbital analysis, he discovered 22 pairs (mostly additional components to these systems) and moving pairs, and his highlighting the rapid motion of these systems resulted in them being placed on many programs and led to the more definitive orbits of today. As a staff member of the Flagstaff Station, Dick was, for over 30 years, one of the principal observers on the 61-inch parallax program. He also ventured into other areas of astronomy, including planetary systems. He is credited with discovering the moon of Saturn, Epimetheus, in December 1966, with the USNO Flagstaff Station 61-inch Kaj Strand Astrometric Reflector. He also obtained photographic plates to determine accurate positions of the outer planets for the Voyager 2 approaches to Uranus in 1986 and Neptune in 1989. It is interesting to note that Dick's career in observational astronomy spanned three different eras of astronomical instrumentation and technique. He began his career doing eyeball astronomy, using a filar micrometer to measure double star separations. Photographic astronomy then became dominant and he took many thousands of plates. During the last ten years of his career, electronic cameras, primarily CCDs, replaced photographic plates. He readily adapted to the changing technologies. A man of many interests, Dick was fascinated by the history of astronomy, especially archeoastronomy, as well as Egyptology. He taught himself the language of hieroglyphics. In 1977, having accumulated several weeks of vacation time, he set off on a trek to walk the Nile for 500 miles from Aswan to Cairo. One night, in the town Asyut along the Nile, he was brought into the police station. The local inhabitants found it hard to credit his story that he was simply on a walk and questioned him as a possible Israeli spy. Following his retirement from the Naval Observatory, Dick consulted in a couple of construction projects. He designed the analemma and the skywalk star fields for the Koch Center for Science, Math, and Technology at Deerfield Academy in Massachusetts. He also c

Pier, Jeffrey R.; Mason, Brian

2005-12-01

100

Maturation of bone marrow-derived dendritic cells by a novel ?-glucan purified from Paenibacillus polymyxa JB115  

PubMed Central

We investigated the immunostimulatory effects of a novel ?-glucan purified from Paenibacillus (P.) polymyxa JB115 on bone marrow-derived dendritic cells (DCs), a type of potent antigen-presenting cells. ?-glucan isolated from P. polymyxa JB115 enhanced the viability and induced the maturation of DCs. ?-glucan markedly increased the cytokine production of DCs and surface expression of DC markers. In addition, DCs treated with ?-glucan showed a higher capacity to stimulate allogeneic spleen cell proliferation compared to those treated with medium alone. These results demonstrate the effect of ?-glucan on DC maturation and may increase the use of ?-glucan.

Ko, Eun-Ju; Byon, Yun-Young; Jee, Youngheun; Shin, Taekyun; Park, Seung-Chun; Hahn, Tae-Wook

2011-01-01

101

Basic Fibroblast Growth Factor Regulates Persistent ERK Osciliations in Premaligant but not Malignant JB6 Cells  

SciTech Connect

basic fibroblast growth factor (bFGF or FGF2) plays an important role in epidermal wound healing in vivo and is associated with a persistent increased in the extracellular signal-regulated kinase (ERK) pathway in vitro. Here we have examined whether bFGF induces the closure of an experimental scratch wound in JB6 mouse epidermal cells and have explored the regulation of the ERK pathway by bFGF in the context of kinase oscillations. bFGF stimulation is associated with increases in cellular phospho-ERK and phospho-c-Jun levels. In addition, bFGF increases cell proliferation and a change in cell morphology (stellate appearance) in a dose-dependent fashion (0.1 – 100 ng/ml). bFGF treatment also promoted the closure of an experimental scratch wound in vitro. JB6 cells were stably transfected with an ERK1-GFP chimera to follow temporal ERK subcellular distribution patterns. We observe a persistent upregulation of the ERK pathway, as evidenced by a significant increase in nuclear ERK1-GFP levels at time points up to 24 hr after bFGF treatment. Interestingly, at the single cell level, ERK is observed to oscillate between nuclear and cytosolic compartments in response to bFGF treatment. Because this oscillatory behavior is asynchronous in the cell population, it is only clearly resolved at the single cell level. Collectively, data presented here are consistent with an important role for bFGF in wound healing and suggest a more complex regulation of the ERK pathway by bFGF than has previously been appreciated.

Weber, Thomas J.; Shankaran, Harish; Wiley, H. S.; Opresko, Lee K.; Chrisler, William B.; Quesenberry, Ryan D.

2010-05-02

102

Brans-Dicke cosmology in R1×S1×S2 topological space-time.  

NASA Astrophysics Data System (ADS)

The authors study the spherically symmetric Kontowski-Sachs metric using Brans-Dicke theory. Explicit solutions are determined for the vacuum and for a perfect-fluid model, using transformation of the time variable or assuming some power law relation between the metric coefficients and the Brans-Dicke scalar field.

Chakraborty, S.; Ghosh, T. K.

1999-10-01

103

Spherically-symmetric charged perfect fluid distribution in Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

Solutions to the Brans-Dicke (1961) field equations in Dicke's (1962) conformally-transformed units are presented for the case when the source of the gravitational field is a charged perfect fluid and the line element is that of Robertson-Walker. A class of exact solutions is presented for nonzero values of charge density and conductivity.

Singh, R. T.; Usham, J. K.

1989-05-01

104

A Quintessence Problem in Brans Dicke Theory with Varying Speed of Light  

NASA Astrophysics Data System (ADS)

It is shown that minimally coupled scalar field in Brans Dicke theory with varying speed of light can solve the quintessence problem and it is possible to have a non-decelerated expansion of the present universe with Brans Dicke-theory for anisotropic models without any matter.

Chakraborty, Subenoy; Chakraborty, Narayan Chandra; Debnath, Ujjal

105

Dicke narrowing and collisional broadening of spectral lines in dilute molecular gases  

Microsoft Academic Search

A unified description of pressure broadening and Dicke or diffusional narrowing of spectral lines is presented from the point of view of a quantum mechanical kinetic theory. The present description of Dicke narrowing includes the correlation between collision-induced changes in the internal energy levels and the molecular velocity. The spectral line shape function is expressed in terms of relaxation coefficients

Gregory C. Corey; Frederick R. McCourt

1984-01-01

106

1. Henry Beardsley standing in front of his store in ...  

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

1. Henry Beardsley standing in front of his store in Ohio. Photographer unknown, 1887. Source: William M. Beardsley - Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoenix, Maricopa County, AZ

107

4. Historic American Buildings Survey, Henry Pleasants, History of the ...  

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

4. Historic American Buildings Survey, Henry Pleasants, History of the Old Eagle School, John C. Winston Co., 1909 PHOTOCOPY. - Eagle School, Old Eagle School Road (State Route 543) (Tredyffrin Township), Strafford, Chester County, PA

108

3. Historic American Buildings Survey, Henry Pleasants, History of the ...  

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

3. Historic American Buildings Survey, Henry Pleasants, History of the Old Eagle School, John C. Winston Co., 1909 PHOTOCOPY. - Eagle School, Old Eagle School Road (State Route 543) (Tredyffrin Township), Strafford, Chester County, PA

109

18. Photocopy of Photograph (Original held by Henry Ford Archives, ...  

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

18. Photocopy of Photograph (Original held by Henry Ford Archives, Dearborn, Michigan, Detroit Edison Negative No. 3545, 5 October 1915) INTERIOR VIEW, MACHINE ROOM, LOOKING SOUTH - Detroit Edison Hart Substation, 11736 East Vernor, Detroit, Wayne County, MI

110

17. Photocopy of Photograph (Original held by Henry Ford Archives, ...  

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

17. Photocopy of Photograph (Original held by Henry Ford Archives, Dearborn, Michigan, Detroit Edison Negative No. 2976, 8 March 1915) NORTH SIDE AND EAST FRONT, FROM HART, LOOKING SOUTH - Detroit Edison Hart Substation, 11736 East Vernor, Detroit, Wayne County, MI

111

24. Historic American Buildings Survey Photographed by Henry F. Withey, ...  

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

24. Historic American Buildings Survey Photographed by Henry F. Withey, November, 1936 RUINS OF GATEWAY TO OLD LAUNDRY AND SWIMMING POOL - Mission San Luis Rey de Francia, Mission Road, Oceanside, San Diego County, CA

112

4. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

4. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 WEST REAR FROM GARDEN SHOWING SOUTH WALL OF PATIO. - Andres Pico House, 10940 Sepulveda Boulevard, San Fernando, Los Angeles County, CA

113

1. Historic American Buildings Survey, Photographed by Henry F. Withey, ...  

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

1. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19, 1934. VIEW FROM THE SOUTHWEST - Pioneer House of the Mother Colony, 414 North West Street (moved from North Los Angeles Street), Anaheim, Orange County, CA

114

2. Historic American Buildings Survey, Photographed by Henry F. Withey, ...  

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

2. Historic American Buildings Survey, Photographed by Henry F. Withey, April 19th, 1934. VIEW FROM THE NORTHWEST - Pioneer House of the Mother Colony, 414 North West Street (moved from North Los Angeles Street), Anaheim, Orange County, CA

115

19. Historic American Buildings Survey Photographed by Henry F. Withey, ...  

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

19. Historic American Buildings Survey Photographed by Henry F. Withey, November, 1936 OLD ARCADE WEST SIDE OF PROPERTY - Mission San Luis Rey de Francia, Mission Road, Oceanside, San Diego County, CA

116

2. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

2. Historic American Buildings Survey Photographed by Henry F. Withey March 1936 VIEW OF FOUNTAIN IN MISSION PARK, MISSION PROPERTY AT ONE TIME. - Mission San Fernando Rey de Espana, Fountains, Mission Boulevard, San Fernando, Los Angeles County, CA

117

8. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

8. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY FROM EAST CORNER. - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

118

2. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

2. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF FOUNTAIN, SMITHY AND SOAP FACTORY (LOOKING EAST) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

119

7. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

7. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY (S. W. Side) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

120

5. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

5. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SMITHY AND SOAP FACTORY (LOOKING SOUTH) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

121

23. Henry Whitehead place in Cades Cove looking ESE. ...  

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

23. Henry Whitehead place in Cades Cove looking ESE. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

122

James McHenry, MD: physician, patriot, politician and poet.  

PubMed

James McHenry emigrated from Ireland to the American colonies in 1771. He studied medicine with Dr. Benjamin Rush in Philadelphia and immediately volunteered as an Army surgeon when the Revolutionary War began. After serving in the medical department in Massachusetts, New York and at Valley Forge in Pennsylvania, he became an aide to General George Washington and subsequently an aide to the Marquis de Lafayette. President Washington appointed McHenry Secretary of War and he continued in that post under president John Adams. While Secretary, he revised military regulations, established a professional standing Army, pacified the Indians, enlarged the naval forces, organized the armed forces under civilian authority and initiated plans for a military academy. Baltimore's Fort Whetstone was renamed Fort McHenry in his honor. During the War of 1812, Fort McHenry gained fame as the birthplace of the national anthem of the United States. PMID:12856797

Spiegel, Allen D; Kavaler, Florence

2003-08-01

123

Henry Darcy in his own words  

NASA Astrophysics Data System (ADS)

A recently published English translation of the Les Fontaines publiques de la ville de Dijon1 provides access to Henry Darcy's own words on the importance of water for public sanitation and on questions engineers face in building water supply systems. Written near the end of Darcy's life, the book is a compendium of the water knowledge he had gained over decades and his opinions on these topics reveal his personality. In the 1840s, Darcy built a water supply system to provide water to 120 street fountains for domestic purposes, street washing and firefighting. Surrounded by poverty, Darcy insisted on free water for the poor and on sharing the spring water with towns located along the aqueduct that brought it to Dijon. In the preface to the book, Darcy introduces his experiment on water flow through sand with the modest words “to my knowledge, no one has experimentally demonstrated the laws of water flow through sand.” This article provides a sampling of the book's insights into the personality of this remarkable man.

Bobeck, Patricia

2006-09-01

124

Henry W. Riecken Jr. (1917-2012).  

PubMed

Presents an obituary for Henry (Hank) W. Riecken Jr. In 1950, Riecken received his doctorate from Harvard University, having studied in the Department of Social Relations, which enjoyed a well-known relationship with the Department of Psychology. A thought leader, and a follower and booster of interesting thoughts (more prescience), Riecken was the first director of the National Science Foundation's (NSF's) Office of Social Sciences (later called a division) in 1959. As vice president and then president of the Social Science Research Council (SSRC) from 1966 to 1971, Hank led the development of the first state-of-the-art monograph on randomized controlled trials in the United States. Riecken was a member of the first Director's Advisory Committee at the National Institutes of Health. He became a member of the National Academy of Sciences' Board on Medicine in 1969 (one of two social scientists) and, as a founding member, assisted in the challenging effort to create the Institute of Medicine (IOM) in 1971. Hank is survived by his children Gilson, Susan, and Anne. He talked about them often, gently, and proudly and clearly loved them. The current Riecken Foundation, whose mission aims at substantial enhancements to libraries in Guatemala, is a testimony to Riecken's beneficence and to the intellectually generous spirit of him and his family. PMID:23895610

Boruch, Robert F

2013-01-01

125

Effect of substrate Henry's constant on biofilter performance.  

PubMed

Butanol, ether, toluene, and hexane, which have Henry's constants ranging from 0.0005 to 53, were used to investigate the effects of substrate solubility or availability on the removal of volatile organic compounds (VOCs) in trickle-bed biofilters. Results from this study suggest that, although removal of a VOC generally increases with a decrease in its Henry's constant, an optimal Henry's constant range for biofiltration may exist. For the treatment of VOCs with high Henry's constant values, such as hexane and toluene, the transfer of VOCs between the vapor and liquid phases or between the vapor phase and the biofilm is a rate-determining step. However, oxygen (O2) transfer may become a rate-limiting step in treating VOCs with low Henry's constants, such as butanol, especially at high organic loadings. The results demonstrated that in a gas-phase aerobic biofilter, nitrate can serve both as a growth-controlling nutrient and as an electron acceptor in a biofilm for the respiration of VOCs with low Henry's constants. Microbial communities within the biofilters were examined using denaturing gradient gel electrophoresis to provide a more complete picture of the effect of O2 limitation and denitrification on biofilter performance. PMID:15115369

Zhu, Xueqing; Suidan, Makram T; Pruden, Amy; Yang, Chunping; Alonso, Cristina; Kim, Byung J; Kim, Byung R

2004-04-01

126

On the dynamical structure of the Dicke maser model  

NASA Astrophysics Data System (ADS)

For suitable states of the Dicke maser model we study the time evolution of the mean photon number n( t) in the limit N ? ?. Here N is the number of maser active atoms. Our starting point is a well-tuned cavity with only one mode of the radiation field excited. Introducing new dynamical variables we are able to exploit fully the conservation laws so as to get a simple but completely rigorous solution. We find that n( t) is periodic, and given by a Weierstrassian elliptic function, provided a net polarization is present in the cavity. No approximation is involved.

Van Hemmen, J. L.; Von Waldenfels, W.

1980-01-01

127

Observational constraints imposed by Brans-Dicke cosmologies.  

NASA Technical Reports Server (NTRS)

Flat-space Brans-Dicke (BD) cosmologies previously found are analyzed in more detail. It is shown that the observed values of the matter density, the Hubble age, the ages of objects in the universe, the deceleration parameter, and the bound on the (unobserved) fractional time variation of the gravitational constant are too inaccurate to distinguish between the BD and Einstein-Friedmann cosmologies. An attempt is made to argue that because of the great degree of latitude in the observational constraints imposed by the BD cosmologies, efforts to improve the bound on the fractional time variation of G alone are not sufficient to rule out the BD theory.

Morganstern, R. E.

1973-01-01

128

New Exact Vacuum Solutions in Brans-Dicke Theory  

NASA Astrophysics Data System (ADS)

A family of exact solutions to vacuum Brans-Dicke theory with spherical symmetry is found. In the limit of large ? this family reduces to the solutions obtained in general relativity with a scalar field. The solutions show curvature singularities for all times, therefore they do not represent the gravitational collapse of a physical system with regular initial data in the theory. One would like to interpret it as an inhomogeneous dynamical cosmology, but the lack of a regular spacelike slice forbids it. For a special value of an integration constant we have an isotropic cosmological model without the problems mentioned above.

Pimentel, Luis O.

129

Exploring Symmetry Breaking at the Dicke Quantum Phase Transition  

SciTech Connect

We study symmetry breaking at the Dicke quantum phase transition by coupling a motional degree of freedom of a Bose-Einstein condensate to the field of an optical cavity. Using an optical heterodyne detection scheme, we observe symmetry breaking in real time and distinguish the two superradiant phases. We explore the process of symmetry breaking in the presence of a small symmetry-breaking field and study its dependence on the rate at which the critical point is crossed. Coherent switching between the two ordered phases is demonstrated.

Baumann, K.; Mottl, R.; Brennecke, F.; Esslinger, T. [Institute for Quantum Electronics, ETH Zuerich, 8093 Zuerich (Switzerland)

2011-09-30

130

The solar and geomagnetic inputs into the JB2008 thermospheric density model for use by CIRA08 and ISO 14222  

NASA Astrophysics Data System (ADS)

Solar and geomagnetic indices are described for use in the Jacchia-Bowman 2008 thermospheric density model (JB2008). There are four solar and two geomagnetic indices used by JB2008. The F10.7, S10.7, M10.7, and Y10.7 solar indices are formed using the JB2006 methodology and they map energy from specific solar irradiance sources to major thermospheric layers. Energy that is deposited to the lower thermosphere and mesopause (85-100 km) is now provided. These solar proxies and indices are compliant with the ISO International Standard 21348 for determining solar irradiances. Reference values of the solar indices and proxies for short-term, intermediate-term, solar cycle, and 25-year periods from solar cycle 23 examples are provided for users who want reference values for planning and tests. The ap geomagnetic and Dst ring current indices are used in a two-index formulation that captures both low/unsettled activity and substorms/storms to represent changes to the neutral thermospheric densities as a result of high-latitude Joule heating and charged particle precipitation. The storm effects change the rate of exospheric temperature change, dTc, which affects satellite orbits. Reference values for ap, Dst, and dTc are provided using an example storm of November 20-21, 2003 for users who want reference values for planning and tests. Use of these solar, geomagnetic, and ring current indices in the JB2008 model produces significant improvements in empirical thermospheric density modeling. JB2008 provides standard deviations of approximately 9-10 percent at 400 km, which is a significant decrease from 16 percent 1-sigma uncertainty previously obtained using the Jacchia 70 model.

Tobiska, W. Kent

131

A paracrine signal mediates the cell transformation response to low dose gamma radiation in JB6 cells  

SciTech Connect

Radiation at low doses (? 50 cGy) can enhance or reduce tumor incidence in the mouse skin multistage model of carcinogenesis, depending on the timing of radiation exposure relative to chemical initiator. Here we have used JB6 mouse epidermal cells, an in vitro model of late stage tumor promotion, to evaluate the effects of low dose gamma radiation on cell transformation response. JB6 cells were isolated from the DNA-dependent Protein Kinase (DNA-PK) deficient Balb/c mouse that exhibits an unusually sensitive mammary tumor response to ionizing radiation. Exposure of JB6 cells to low dose (2-20 cGy) gamma radiation increased cell transformation response in a dose- and cell density-dependent fashion. JB6 cells were transfected with a membrane targeted enhanced yellow fluorescent protein (EYFP-membrane) and used as bystander cells in a co-culture model. Co-culture of 10 cGy irradiated JB6 cells with na?ve EYFP-membrane cells resulted in a significant increase in EYFP-expressing colonies, relative to co-cultures of sham exposed P+ cells/na?ve EYFP-membrane cells. In contrast, low dose gamma radiation (20 cGy) reduced tumor promoter (epidermal growth factor; 12-O-tetradecanoyl phorbol-13-acetate)-induced transformation response and cell survival in a clonogenic assay to a comparable extent (40%). Our results demonstrate different selective pressures depending on whether low dose radiation modulated the cell transformation response of irradiated or bystander cells, or whether irradiation occurred in conjunction with tumor promoter treatment. The co-culture system developed here is a promising model to define positive and negative selective pressures induced by low dose radiation in a DNA damage repair deficient context that are relevant to carcinogenesis responses.

Weber, Thomas J.; Siegel, Robert W.; Markillie, Lye Meng; Chrisler, William B.; Lei, Xingye C.; Colburn, Nancy H.

2005-05-01

132

Memory drum theory's C movement: revelations from Franklin Henry.  

PubMed

Franklin Henry's "memory drum" theory of neuromotor reaction (Henry & Rogers, 1960) was one of the most influential studies of the response programming stage of information processing. The paper is the most-cited study ever published in the Research Quarterly for Exercise and Sport. However, few people know there is a noteworthy error in the paper, namely in the description of the C movement, the most complicated of the three responses studied. Henry himself was unaware of the error for nearly 20 years after the paper's publication. The purpose of our paper is to accord the factual record its due respect by revealing the history about the error and its correction. The data are in the form of the original 1960 paper which describes the C movement, a paper by Howell (1953), and personal letters from Henry dating from 1979, when the error was first discovered, and continuing through 1986. In one letter, Henry attributed the error to a mild and specific form of aphasia, manifested by word reversals, from which he suffered throughout his scholarly life. Such a revelation makes the career of this remarkable scholar even more remarkable. PMID:18816942

Fischman, Mark G; Christina, Robert W; Anson, J Grog

2008-09-01

133

Linear and non-linear relationships mapping the Henry’s law parameters of organic pesticides  

NASA Astrophysics Data System (ADS)

This work aims to predict the air to water partitioning for 96 organic pesticides by means of the Quantitative Structure-Property Relationships Theory. After performing structural feature selection with Genetics Algorithms and Replacement Method linear approaches, it is found that among the most important molecular features appears the Moriguchi octanol-water partition coefficient, and higher lipophilicities would lead to compounds having higher Henry's law constants. We also compare the statistical performance achieved by four fully-connected Feed-Forward Multilayer Perceptrons Artificial Neural Networks. The statistical results found reveal that the best performing model uses the Levenberg-Marquardt with Bayesian regularization (BR) weighting function for achieving the most accurate predictions.

Goodarzi, Mohammad; Ortiz, Erlinda V.; Coelho, Leandro dos S.; Duchowicz, Pablo R.

2010-08-01

134

The exact solution of generalized Dicke models via Susskind-Glogower operators  

NASA Astrophysics Data System (ADS)

We show a right unitary transformation approach based on Susskind-Glogower operators that diagonalizes a generalized Dicke Hamiltonian in the field basis and delivers a tridiagonal Hamiltonian in the Dicke basis. This tridiagonal Hamiltonian is diagonalized by a set of orthogonal polynomials satisfying a three-term recurrence relation. Our result is used to deliver a closed form, analytic time evolution for the case of a Jaynes-Cummings-Kerr model and to study the time evolution of the population inversion, reduced field entropy and Husimi’s Q-function of the field for ensembles of interacting two-level systems under a Dicke-Kerr model.

Rodríguez-Lara, B. M.; Moya-Cessa, H. M.

2013-03-01

135

Experimental quantum networking protocols via four-qubit hyperentangled Dicke states.  

PubMed

We report the experimental demonstration of two quantum networking protocols, namely quantum 1?3 telecloning and open-destination teleportation, implemented using a four-qubit register whose state is encoded in a high-quality two-photon hyperentangled Dicke state. The state resource is characterized using criteria based on multipartite entanglement witnesses. We explore the characteristic entanglement-sharing structure of a Dicke state by implementing high-fidelity projections of the four-qubit resource onto lower-dimensional states. Our work demonstrates for the first time the usefulness of Dicke states for quantum information processing. PMID:23215188

Chiuri, A; Greganti, C; Paternostro, M; Vallone, G; Mataloni, P

2012-10-26

136

The deviation of light path in Einstein-Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

Both Jordan-Brans-Dicke (shortened JBD) theory and Brans-Dicke theory in the Einstein’s frame (shortened EBD) are treated as Brans-Dicke theory. However, we learn that only Pauli metric represents the massless spin-two graviton and thus, should be identified as physical. If one just considers the weak field approximation and Newtonian limit, EBD theory gives the same results with Einstein’s general relativity. So, it is necessary to consider strong field effects and cosmological model. The purpose of this paper is to find the exact spherically symmetric metric in the strong field situation, and deduce the deviation of light path in EBD theory.

Huang, Z. G.; Lu, H. Q.; Pan, P. P.

2005-02-01

137

Quercetin-3-methyl ether suppresses proliferation of mouse epidermal JB6 P+ cells by targeting ERKs  

PubMed Central

Chemoprevention has been acknowledged as an important and practical strategy for the management of skin cancer. Quercetin-3-methyl ether, a naturally occurring compound present in various plants, has potent anticancer-promoting activity. We identified this compound by in silico virtual screening of the Traditional Chinese Medicine Database using extracellular signal-regulated kinase 2 (ERK2) as the target protein. Here, we showed that quercetin-3-methyl ether inhibited proliferation of mouse skin epidermal JB6 P+ cells in a dose- and time-dependent manner by inducing cell cycle G2–M phase accumulation. It also suppressed 12-O-tetradecanoylphorbol-13-acetate-induced neoplastic cell transformation in a dose-dependent manner. Its inhibitory effect was greater than quercetin. The activation of activator protein-1 was dose-dependently suppressed by quercetin-3-methyl ether treatment. Western blot and kinase assay data revealed that quercetin-3-methyl ether inhibited ERKs kinase activity and attenuated phosphorylation of ERKs. Pull-down assays revealed that quercetin-3-methyl ether directly binds with ERKs. Furthermore, a loss-of-function ERK2 mutation inhibited the effectiveness of the quercetin-3-methyl ether. Overall, these results indicated that quercetin-3-methyl ether exerts potent chemopreventive activity by targeting ERKs.

Mottamal, Madhusoodanan; Liu, Kangdong; Zhu, Feng; Cho, Yong-Yeon; Sosa, Carlos P.; Zhou, Keyuan; Bowden, G.Tim; Bode, Ann M.; Dong, Zigang

2012-01-01

138

Fiddle Tunes of the Old Frontier: The Henry Reed Collection  

NSDL National Science Digital Library

This remarkable collection from the American Memory Project at the Library of Congress brings together an amazing set of traditional fiddle tunes performed by Henry Reed of Glen Lyn, Virginia. The folklorist Alan Jabbour recorded Lyn in 1966 and 1967, and the tunes here "represent the music and evoke the history and spirit of Virginia's Appalachian frontier." The collection contains 184 original sound recordings, 19 pages of field notes, and 69 musical transcriptions with descriptive notes on tune histories and musical features. Visitors won't want to miss the film of Henry Reed's bowing, along with the essay "Henry Reed: His Life, Influence, and Art." It's quite fun to listen to some of these songs, especially the classic "Arkansas Traveler" or the lesser-known "Alabama Girls Give the Fiddler a Dram". [KMG

139

A pH-stable laccase from alkali-tolerant ?-proteobacterium JB: Purification, characterization and indigo carmine degradation  

Microsoft Academic Search

?-Proteobacterium JB, an alkali-tolerant soil isolate, produced laccase constitutively in unbuffered medium. The enzyme was purified to homogeneity by ammonium sulphate precipitation, DEAE-sepharose anion exchange chromatography and preparatory polyacrylamide gel electrophoresis. The purified enzyme was a monomeric polypeptide (MW 120kDa) and absorbed at 590nm indicating the presence of Type I Cu2+-centre. It worked optimally at 55°C and showed different pH

Gursharan Singh; Neena Capalash; Rashmi Goel; Prince Sharma

2007-01-01

140

Complete Genome Sequence of K14JB01, a Novel Variant Strain of Porcine Epidemic Diarrhea Virus in South Korea  

PubMed Central

A novel variant strain of porcine epidemic diarrhea virus (PEDV) emerged on pig farms in South Korea during late 2013. Genomic DNA isolated from a K14JB01 strain identified in a diarrheal pig showed high sequence similarity to PEDV strains prevailing in the United States in 2013. This is the first study to identify the complete genome sequence of a novel variant PEDV in South Korea.

Cho, Yoon-Young; Lim, Seong-In; Kim, Yong Kwan; Song, Jae-Young; Lee, Joong-Bok

2014-01-01

141

Magnetized chameleonic Brans-Dicke cosmology and phase space analysis  

NASA Astrophysics Data System (ADS)

This paper deals with the study of dynamical or phase space analysis of Bianchi I universe in Brans-Dicke gravity with chameleon scalar field. For this purpose, the matter contents are taken to be perfect fluid with magnetic field effects described by the non-linear Maxwell Lagrangian density. By taking some ansatz for the field potential and the interaction function in chameleon cosmology, we discuss three cases: Bianchi I universe with perfect fluid, FRW universe with magnetized perfect fluid and Bianchi I universe with magnetized perfect fluid. In all cases, we calculate fixed or critical points and discuss stability of the respective configuration for radiation as well as matter dominated eras. We also evaluate some cosmological parameters in each case for matter dominated era only and investigate their cosmological implications.

Sharif, M.; Waheed, Saira

2014-05-01

142

Mathematical methods in quantum optics: the Dicke model  

NASA Astrophysics Data System (ADS)

We show how various mathematical formalisms, specifically the catastrophe formalism and group theory, aid in the study of relevant systems in quantum optics. We describe the phase transition of the Dicke model for a finite number N of atoms, via three different methods, which led to universal parametric curves for the expectation value of the first quadrature of the electromagnetic field and the expectation value of the number operator, as functions of the atomic relative population. These are valid for all values of the matter-field coupling parameter, and valid for both the ground and first-excited states. Using these mathematical tools, the critical value of the atom-field coupling parameter is found as a function of the number of atoms, from which its critical exponent is derived.

Nahmad-Achar, Eduardo; Castaños, Octavio; López-Peña, Ramón; Hirsch, Jorge G.

2013-03-01

143

Dynamics of Brans-Dicke cosmology with varying mass fermions  

SciTech Connect

In this paper, the cosmological dynamics of Brans-Dicke (BD) theory in which there are fermions with a coupling to BD scalar field as well as a self-interaction potential is investigated. The conditions that there exists a solution which is stable and represents a late-time accelerated expansion of the Universe are found. The variable mass of fermions cannot vanish exactly during the evolution of the Universe once it exists initially. It is shown that the late-time acceleration depends completely on the self-interaction of the fermion field if our investigation is restricted to the theory with positive BD parameter {omega}. Provided a negative {omega} is allowed, there will be another two classes of stable solutions describing the late-time accelerated expansion of the Universe.

Liu Daojun [Center for Astrophysics, Shanghai Normal University, 100 Guilin Road, Shanghai 200234 (China)

2010-09-15

144

On the limit of Brans-Dicke theory when ? ? ?  

NASA Astrophysics Data System (ADS)

We discuss the problem of the limit of the Brans-Dicke theory (BDT) in the limit ? ? ?, when the trace of the stress tensor is not zero. It is shown that a BDT solution, with T ¬=; 0, known in the framework of anisotropic cosmology, fails to converge to the general relativity theory (GRT) corresponding solution. Considering the spherically symmetric field problem, it is shown that the argument leading to the convergence in the static case is lost when the non-static case is considered. These remarks suggest that the non-convergence of BDT to GRT could be the general behaviour, even if T ¬=; 0, except for some (most?) of the highly symmetric solutions, including most of the known ones. The impact on gravitational radiation detection is emphasized.

Chauvineau, Bertrand

2003-07-01

145

Dynamical apparent horizons in inhomogeneous Brans-Dicke universes  

NASA Astrophysics Data System (ADS)

The presence and evolution of apparent horizons in a two-parameter family of spherically symmetric, time-dependent solutions of Brans-Dicke gravity are analyzed. These solutions were introduced to model space- and time-varying gravitational couplings and are supposed to represent central objects embedded in a spatially flat universe. We find that the solutions possess multiple evolving apparent horizons, both black hole horizons covering a central singularity and cosmological ones. It is not uncommon for two of these horizons to merge, leaving behind a naked singularity covered only by a cosmological horizon. Two characteristic limits are also explicitly worked out: the limit where the theory reduces to general relativity and the limit where the solutions become static. The physical relevance of this family of solutions is discussed.

Faraoni, Valerio; Vitagliano, Vincenzo; Sotiriou, Thomas P.; Liberati, Stefano

2012-09-01

146

Matter-field entanglement within the Dicke model  

NASA Astrophysics Data System (ADS)

We use the Dicke model to describe a system of NA two level atoms interacting with a one mode electromagnetic field. Symmetry Adapted Coherent States are used to obtain the ground and first-excited wave-functions of the model. These are constructed from linear combinations of the standard coherent states, thus resembling much better the behavior of the exact quantum states obtained through the diagonalization of the Hamiltonian. By means of the linear and von Neumann entropies we determine the entanglement properties between the matter and field degrees of freedom as a function of the coupling strength of the model. We find that their maximum value determines the position of the quantum phase transition of the normal to the superradiant regime for a finite number of atoms.

Castaños, O.; López-Peña, R.; Nahmad-Achar, E.; Hirsch, J. G.

2012-10-01

147

Effects of psoralen from Psoralea corylifolia on quinone reductase, ornithine decarboxylase, and JB6 cells transformation promotion.  

PubMed

The cancer chemopreventive effect of psoralen isolated from the seeds of Psoralea corylifolia was investigated in the induction of quinone reductase (QR) activity, intracellular detoxification enzyme, inhibition of 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase (ODC) activity, a key regulatory enzyme for polyamine metabolism, and tumor promotion in mouse epidermal JB6 cells, sensitive to tumor promoters (clone 415a P+ cells), which are related to suppress multistage carcinogenesis including initiation and promotion. Psoralen was isolated and identified from the ethyl acetate-soluble fraction of the methanolic extract from the seeds. Psoralen was active in induction of QR activity, the concentration of psoralen required to induce 1.5 fold QR activity was 14.8 ?g/mL. Also, this pure compound inhibited TPA-induced ODC activity by 50% (designated IC(50)) at the concentration 15.6 ?g/mL and exhibited inhibition of TPA-induced tumor promotion in mouse epidermal JB6 cells with an IC(50) value of 17.1 ?g/mL. Therefore, it is extrapolated that psoralen has the potential capable of inhibiting the initiation and/or promotion stage of carcinogenesis by induction of QR activity, inhibition of TPA-induced ODC activity and mouse epidermal JB6 cells tumor promotion. PMID:21468912

Lee, Sung-Jin; Nam, Kung-Woo; Mar, Woongchon

2011-01-01

148

Inequivalence of five-dimensional relativity and Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

We present a static spherically symmetric solution to the field equations RAB=0 in five-dimensional relativity and use it to demonstrate a significant inequivalence between five-dimensional relativity and the Brans-Dicke scalar-tensor theory.

Moose, Allan E.; Ahner, Henry F.

1982-09-01

149

From Brans-Dicke gravity to a geometrical scalar-tensor theory  

NASA Astrophysics Data System (ADS)

We consider an approach to the Brans-Dicke theory of gravity in which the scalar field has a geometrical nature. By postulating the Palatini variation, we find out that the role played by the scalar field consists in turning the space-time geometry into a Weyl integrable manifold. This procedure leads to a scalar-tensor theory that differs from the original Brans-Dicke theory in many aspects and presents some new features.

Almeida, T. S.; Pucheu, M. L.; Romero, C.; Formiga, J. B.

2014-03-01

150

parameter and Solar System constraint in chameleon-Brans-Dicke theory  

Microsoft Academic Search

The post Newtonian parameter is considered in the chameleon-Brans-Dicke model. In the first step, the general form of this parameter and also effective gravitational constant is obtained. An arbitrary function for f(), which indicates the coupling between matter and scalar field, is introduced to investigate validity of solar system constraint. It is shown that the chameleon-Brans-Dicke model can satisfy the

Kh. Saaidi; A. Mohammadi; H. Sheikhahmadi

2011-01-01

151

gamma parameter and Solar System constraint in chameleon-Brans-Dicke theory  

Microsoft Academic Search

The post Newtonian parameter is considered in the chameleon-Brans-Dicke model. In the first step, the general form of this parameter and also effective gravitational constant is obtained. An arbitrary function for f(Phi), which indicates the coupling between matter and scalar field, is introduced to investigate validity of solar system constraint. It is shown that the chameleon-Brans-Dicke model can satisfy the

Kh. Saaidi; A. Mohammadi; H. Sheikhahmadi

2011-01-01

152

The Detection Performance of the Siebert and Dicke-Fix CFAR Radar Detectors  

Microsoft Academic Search

The Siebert and the Dicke-fix CFAR radar detectors, used to maintain a constant false alarm rate (CFAR) in radar receivers under very similar circumstances, are considered. The Siebert detector represents the maximum-likelihood detection procedure for a signal in Gaussian noise of unknown power level, whereas the Dicke-fix makes use of a bandpass limiter to normalize the input and thus ensure

V. G. Hansen; A. J. Zottl

1971-01-01

153

Comment on the Brans Dicke Bianchi Type-Iii Vacuum Solution  

NASA Astrophysics Data System (ADS)

The author wishes to point out that the Brans-Dicke-Bianchi type-III vacuum solution recently given by Tiwari and Singh (1984) is not new. Moreover, the solution given has no correct Einstein limit, contrary to what is claimed by these authors. The Ellis-MacCallum vacuum solution in the Einstein case can be obtained from the Brans-Dicke solution first given by Lorenz-Petzold (1984).

Lorenz-Petzold, Dieter

1985-02-01

154

Uniqueness of self-similar asymptotically Friedmann-Robertson-Walker spacetime in Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

We investigate spherically symmetric self-similar solutions in Brans-Dicke theory. Assuming a perfect fluid with the equation of state p=(?-1)?(1<=?<2), we show that there are no nontrivial solutions which approach asymptotically to the flat Friedmann-Robertson-Walker spacetime if the energy density is positive. This result suggests that primordial black holes in Brans-Dicke theory cannot grow at the same rate as the size of the cosmological particle horizon.

Maeda, Hideki; Koga, Jun-Ichirou; Maeda, Kei-Ichi

2002-10-01

155

The Teaching Approach of Henry Schaefer-Simmern.  

ERIC Educational Resources Information Center

This description of the teaching approach of Henry Schaefer-Simmern emphasizes his use of questioning to evoke student self-evaluation and to develop clarity of vision and interfunctional unity in students' art products and their mental, artistic conceiving. Two case reports of his work with elementary students are included. (Author/SJL)

Abrahamson, Roy E.

1980-01-01

156

6. Historic American Buildings Survey Photographed by Henry F. Withey ...  

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

6. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY & SMITHY (FROM S. E. END OF SOAP FACTORY) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA

157

Henry Ossawa Tanner: Race, Religion, and Visual Mysticism  

Microsoft Academic Search

According to some scholars, religion is inseparable from the African-American experience. Others viewed race as almost a separate ontological category from religion. How can it be possible for scholars to view the relationship between race and religion so differently? “Henry Ossawa Tanner: Race, Religion, and Visual Mysticism” seeks to understand the complex relationship between religion and race and to explore

Kelly Jeannette Baker

2003-01-01

158

10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST ...  

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

10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST SIDE ELEVATION Restricted: Permission for use must be obtained in writing from the Beinecke Rare Book and Manuscript Library Yale University, New Haven, Conn. - Willis Bristol House, 584 Chapel Street, New Haven, New Haven County, CT

159

4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. ...  

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

4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. 1845 Restricted: Permission for use must be obtained in writing from Beinecke Rare Book and Manuscript Library Yale University, New Haven, Conn. - Grove Street Cemetery Entrance, 227 Grove Street, New Haven, New Haven County, CT

160

America's Earliest Revolutionary Voice: Po-Pay--Not Patrick Henry.  

ERIC Educational Resources Information Center

A full century before Patrick Henry's persuasive battle for the rights of oppressed people, a San Juan Pueblo Indian medicine man known only as Po-Pay was the masterful communicator and agitator who orchestrated the first American revolution to drive the Spanish back into Mexico. Seeking mineral wealth, cheap labor, and the maximum number of…

Owen, Gordon R.

161

BOOK REVIEW: Joseph Henry: The Rise of an American Scientist  

Microsoft Academic Search

Albert Moyer has clearly done his research into the events of Joseph Henry's life. The personal, professional, sociological and scientific aspects have been meticulously detailed throughout and the ordering, as in the chapter headings, is chronological, so that there is some element of each of these aspects in each chapter. This is unfortunately both the strength and the weakness of

Albert E. Moyer

1998-01-01

162

Battling for Liberty: Tecumseh's and Patrick Henry's Language of Resistance.  

ERIC Educational Resources Information Center

The reading program described in this lesson plan extends the study of Patrick Henry's "Give Me Liberty or Give Me Death" speech to demonstrate the ways Native Americans also resisted oppression through rhetoric. During five 50-minute lessons, students will: develop an awareness of both Native and non-Native movements to resist oppression and…

Gardner, Traci

163

The Transformative Intellectual: An Examination of Henry Giroux's Ethics  

ERIC Educational Resources Information Center

This article explores Henry Giroux's contributions to critical pedagogy. The author demonstrates how Giroux, as a public intellectual, has found his Ethics in the right place. The author further argues that Giroux's Ethics of virtue are present not only in the public person but also in his transformative writing.

Kashani, Tony

2012-01-01

164

A Teacher's Guide for William Shakespeare's "Henry V."  

ERIC Educational Resources Information Center

This teacher's guide for William Shakespeare's play "Henry V" is designed to accompany the Kenneth Branagh Masterpiece Theater film production of the play, and to help teachers use the film in a variety of ways. The guide includes pre-viewing background information, five teaching units, and a pullout poster for classroom display. The guide begins…

WGBH-TV, Boston, MA.

165

15. Photocopy of map, drawn by Henry Hagey, circa 1900 ...  

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

15. Photocopy of map, drawn by Henry Hagey, circa 1900 (from Willing Inhabitants, original in possession of author, Joyce Munro). FRANCONIA TOWNSHIP MAP. BRIDGE LOCATION IN BOTTOM CENTER - Allentown Road Bridge, Spanning Skippack Creek on Allentown Road, Franconia, Montgomery County, PA

166

Henry's law constants for dimethylsulfide in freshwater and seawater  

NASA Technical Reports Server (NTRS)

Distilled water and several waters of varying salinity were subjected, over a 0-32 C temperature range, to measurements for Henry's law constants for dimethylsulfide. Values for distilled water and seawater of the solubility parameters A and C are obtained which support the concept that the concentration of dimethylsulfide in the atmosphere is far from equilibrium with seawater.

Dacey, J. W. H.; Wakeham, S. G.; Howes, B. L.

1984-01-01

167

Chiral copper-Schiff base catalyst for asymmetric henry reaction  

Microsoft Academic Search

Five copper-Schiff base complexes were synthesized conveniently from copper(II) acetate monohydrate, salicylaldehydes, and\\u000a amino alcohols. The complexes were shown to be effective as catalysts in the asymmetric Henry reaction affording nitro alkanols\\u000a in up to 98% yield with moderate and good enantiomeric excess (up to ee 38.6%).

Yong-guang Gao; Na Chen; Hua-jiang Wu; Xin-sheng Li

2007-01-01

168

In praise of the literary eponym--Henry V sign  

PubMed Central

The use of eponyms in medicine is often discouraged. However, the literary eponym should be an exception as it is not linked with many of the difficulties associated with conventional eponyms and offers descriptive brevity and accuracy. Here, we illustrate the point with Henry V sign, which will be familiar to many who have cared for patients in the terminal stage of illness.

Houlihan, C.; Marks, J. Charles

2013-01-01

169

7. Historic American Buildings Survey Photographed by Henry F. Withey, ...  

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

7. Historic American Buildings Survey Photographed by Henry F. Withey, MaY 1937 SHOP RUINS (DETAIL OF SOAP OVEN) - Mission San Juan Capistrano, Industrial Shops, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA

170

DETERMINATION OF HENRY'S LAW CONSTANTS OF SELECTED PRIORITY POLLUTANTS  

EPA Science Inventory

The Henry's law constants (H) for 41 selected priority pollutants were determined to characterize these pollutants and provide information on their fate as they pass through wastewater treatment systems. All experimental values presented for H are averages of two or more replicat...

171

Henry Giroux on Democracy Unsettled: From Critical Pedagogy to the War on Youth--An Interview  

ERIC Educational Resources Information Center

This interview conducted with Henry Giroux begins by probing Henry's childhood, upbringing and undergraduate years to discover where his sense of social justice took hold. It also questions Henry about his working-class background and the major influences on his thought, including his relationships with Paulo Freire and Howard Zinn. The interview…

Peters, Michael A.

2012-01-01

172

Observing precursors of the Dicke quantum phase transition  

NASA Astrophysics Data System (ADS)

A Bose-Einstein condensate coupled to an optical high-finesse cavity realizes an effective version of the Dicke Hamiltonian. This model was predicted to show an intriguing quantum phase transition. In our experiment, a transverse pump field couples collective density waves of the condensate to the cavity light field. By controlling the transverse pump power, the system is driven from the normal to the super-radiant phase. We investigated the excitation spectrum of the coupled system in the normal phase by Bragg spectroscopy and identified a collective density mode which softens at the transition point. This vanishing energy scale significantly alters the spectrum of atomic density fluctuations: the barrier to incoherently populate the soft mode is continuously reduced. The openness of the cavity allows to extract in-situ information about the fluctuations of the system from the photons leaving the cavity. We could reveal increased noise at the frequency of the soft mode by analyzing time-correlations between the leaking cavity photons.

Mottl, Rafael; Brennecke, Ferdinand; Baumann, Kristian; Donner, Tobias; Esslinger, Tilman

2011-06-01

173

From the Jaynes-Cummings-Hubbard to the Dicke model  

NASA Astrophysics Data System (ADS)

We discuss the Jaynes-Cummings-Hubbard model describing the superfluid-Mott insulator transition of polaritons (i.e., dressed photon-qubit states) in coupled qubit-cavity arrays in the crossover from strong to weak correlations. In the strongly correlated regime the phase diagram and the elementary excitations of lattice polaritons near the Mott lobes are calculated analytically using a slave-boson theory (SBT). The opposite regime of weakly interacting polariton superfluids is described by a weak-coupling mean-field theory for a generalized multi-mode Dicke model. We show that a remarkable relation between the two theories exists in the limit of large photon bandwidth and large negative detuning, i.e., when the nature of polariton quasiparticles becomes qubit-like. In this regime, the weak-coupling theory predicts the existence of a single Mott lobe with a change of the universality class of the phase transition at the tip of the lobe, in perfect agreement with the SBT. Moreover, the spectra of low energy excitations, i.e., the sound velocity of the Goldstone mode and the gap of the amplitude mode match exactly as calculated from both theories.

Schmidt, S.; Blatter, G.; Keeling, J.

2013-11-01

174

Self-similar chameleon Jordan-Brans-Dicke cosmological models  

NASA Astrophysics Data System (ADS)

In this paper we study the chameleon Jordan-Brans-Dicke (JBD) cosmological models under the hypothesis of self-similarity. Since there are several ways to define the matter Lagrangian for a perfect fluid: L m =- ? and L m = ??, we show that they bring us to obtain two completely different cosmological models. In the first approach, L m =- ?, there is ordinary matter conservation, while in the second approach, L m = ??, we get matter creation processes. We deduce for each approach the behaviour of each physical quantity, under the self-similar hypothesis, by employing the Lie group method. The results are quite general and valid for any homogeneous geometry (FRW, Bianchi types, etc.). As example, we calculate exact solutions for each approach by considering the case of a Bianchi II geometry. In this way we can determine the exact behaviour of each physical quantity and in particular of G eff and U (the potential that mimics the cosmological constant).We compare the solutions with the obtained ones in the framework of the usual JBD models.

Belinchón, J. A.

2013-12-01

175

Modified Brans–Dicke theory in arbitrary dimensions  

NASA Astrophysics Data System (ADS)

Within an algebraic framework, used to construct the induced-matter-theory (IMT) setting, in (D + 1)-dimensional Brans–Dicke (BD) scenario, we obtain a modified BD theory (MBDT) in D dimensions. Being more specific, from the (D + 1)-dimensional field equations, a D-dimensional BD theory, bearing new features, is extracted by means of a suitable dimensional reduction onto a hypersurface orthogonal to the extra dimension. In particular, the BD scalar field in such D-dimensional theory has a self-interacting potential, which can be suitably interpreted as produced by the extra dimension. Subsequently, as an application to cosmology, we consider an extended spatially flat FLRW geometry in a (D + 1)-dimensional space–time. After obtaining the power-law solutions in the bulk, we proceed to construct the corresponding physics, by means of the induced MBDT procedure, on the D-dimensional hypersurface. We then contrast the resulted solutions (for different phases of the universe) with those usually extracted from the conventional GR and BD theories in view of current ranges for cosmological parameters. We show that the induced perfect fluid background and the induced scalar potential can be employed, within some limits, for describing different epochs of the universe. Finally, we comment on the observational viability of such a model.

Rasouli, S. M. M.; Farhoudi, Mehrdad; Vargas Moniz, Paulo

2014-06-01

176

Twilight of the gods: John Henry Mackay's Der Unschuldige.  

PubMed

The writings of the Scotch-German John Henry Mackay are important for the early cultural history of the modern gay movement. This article recalls this unjustly neglected anarchist writer and advocate of man/boy love by tracing his biography and pointing out his contacts with others in the movement. His late novella Der Unschuldige is analyzed to show that Mackay has encoded homosexuality there in a unique and individual way. PMID:8113599

Kennedy, H

1993-01-01

177

Henry Draper Extension 2 (Cannon+ 1949; ADC 1989)  

NASA Astrophysics Data System (ADS)

Harvard Annals vol 112 is the last extension of the Henry Draper Catalog. It consists entirely of charts. These are copies of the plates on which the number of the star and is spectral type is marked in ink. This catalog is a files of the star numbers and the corresponding spectral types. Note that the positions of the stars from this catalog are computed by Nesterov et al. (1995A&AS..110..367N); see catalog . (1 data file).

Cannon, Annie J.; Mayall, Margaret W.

1997-02-01

178

BOOK REVIEW: Joseph Henry: The Rise of an American Scientist  

NASA Astrophysics Data System (ADS)

Albert Moyer has clearly done his research into the events of Joseph Henry's life. The personal, professional, sociological and scientific aspects have been meticulously detailed throughout and the ordering, as in the chapter headings, is chronological, so that there is some element of each of these aspects in each chapter. This is unfortunately both the strength and the weakness of the biography, as the detail seemed to me to be the most remarkable characteristic of the writing. But, the bigger stories, or the themes, which might have been possible, seemed to get lost. Hence, I found this a book for those who are seriously interested in Joseph Henry; but for those whose interest might be more general, say having an interest in nineteenth century growth of scientific institutions, or wanting to understand the conceptual development of electromagnetism, there seemed to be too much which came from the Henry point of view, rather than locating Henry within his time and context. This is a remark about style, rather than omission of content, as the myriad of details in each paragraph certainly inform the reader about the context. For instance, some sociology of the USA in the nineteenth century could be inferred, say showing how a young man from a modest background might make his way into a professional life, but the information is so particularly a description of Henry's experience that one has to rely on prior knowledge or make assumptions in order to create a sociological perspective. That is, I now know, what happened to Henry, but I do not know if his case was in any sense typical or atypical. Similarly there is information about education in general at that time, and scientific education, research and its publication, as it applied to Henry. The relationships between science in the USA and in Europe have a place, and there is quite a bit of information about the institutions in which Henry worked, particularly Albany Academy, Princeton and the Smithsonian. Henry's marriage and family, and his beliefs are addressed; we hear how his work kept him from his family at times, but also how much they meant to him. And, of course, there are scientific questions and factual information about the field in which he is renowned - electromagnetism. It is hard to find fault with the quantity and breadth of what is offered, and very easy to criticize the way in which it is offered; nevertheless it seems to me that this is a superb record of events, but without the themes or pictures that would make it a biography. Before reading the book, I was acquainted with some of Henry's writing on electromagnetism (researched as part of my own work on Michael Faraday). I looked in vain for the personality whom I had met in a few scientific papers, a person who had written of new experimentation and results, who knew that new theory was needed also, and who, when he could not think of any, said disarmingly, `this part of the investigation, was, for a time, given up almost in despair'. Moyer does not seem to convey this personality whose words engage other people, even at a distance in time. In spite of this severe criticism, the book has an enticing quality, probably best summarized by its introduction. This recounts the quite staggering attendance at Henry's funeral service and the tenor of obituary notices: this man was loved, by many. Hence, while reading, one continually looks for biography which would in some measure account for this loving and high regard. That is, we are given a measure of this man, and then it is as if the nature of the measure remains unknown however often mentioned. Maybe this beginning in a sense creates the disappointment. It would seem that Henry signifies something greater than wide achievements for those who actually knew him or who read his writing. Could this be the willingness to learn and keep trying, to put others' needs in front of his own, to have both modesty and enthusiasm for enquiry, not-knowing as well as knowing, etc? In other words, the humanness which is needed and needs, achievement, is hidden here a

Crawford, Elspeth

1998-09-01

179

Comparison of the insulin reaction of peripheral blood T cells between healthy Holstein dairy cows and JB during the periparturient period.  

PubMed

To compare the changes in the insulin reaction of Holstein dairy cows and Japanese Black cows (JB) during the periparturient period, the insulin resistance test in vivo and lymphocytes proliferation with insulin in vitro were performed. Ten healthy Holstein dairy cows (Holstein group) and 10 healthy JB cows (JB group) used in this study were observed on days 60, 40, and 20 before calving and days 7 and 20 after calving. In insulin resistance reaction in vivo and in vitro, a low insulin-stimulated glucose disposal rate and lymphocyte proliferation with insulin were observed in the Holstein group compared with the JB group during the experimental period. An analysis of the lymphocytes cultured with insulin showed that the percentage of CD4+CD45R- T cells in the Holstein group was significantly lower than that of the JB group before day 20. These findings indicate that T cells reaction to insulin in healthy periparturient Holstein cows is lower than that in Japanese Black. PMID:17146182

Ohtsuka, Hiromichi; Kitagawa, Madoka; Kohiruimaki, Masayuki; Tanami, Erika; Masui, Machiko; Hayashi, Tomohito; Ando, Takaaki; Watanabe, Daisaku; Koiwa, Masateru; Sato, Shigeru; Kawamura, Seiichi

2006-11-01

180

Dicke-type phase transition in a spin-orbit-coupled Bose-Einstein condensate.  

PubMed

Spin-orbit-coupled Bose-Einstein condensates (BECs) provide a powerful tool to investigate interesting gauge field-related phenomena. Here we study the ground state properties of such a system and show that it can be mapped to the well-known Dicke model in quantum optics, which describes the interactions between an ensemble of atoms and an optical field. A central prediction of the Dicke model is a quantum phase transition between a superradiant phase and a normal phase. We detect this transition in a spin-orbit-coupled BEC by measuring various physical quantities across the phase transition. These quantities include the spin polarization, the relative occupation of the nearly degenerate single-particle states, the quantity analogous to the photon field occupation and the period of a collective oscillation (quadrupole mode). The applicability of the Dicke model to spin-orbit-coupled BECs may lead to interesting applications in quantum optics and quantum information science. PMID:24895055

Hamner, Chris; Qu, Chunlei; Zhang, Yongping; Chang, JiaJia; Gong, Ming; Zhang, Chuanwei; Engels, Peter

2014-01-01

181

Comparison between Jordan and Einstein frames of Brans-Dicke gravity a la loop quantum cosmology  

NASA Astrophysics Data System (ADS)

It is well known that the Jordan and Einstein frames are equivalent to each other in classical Brans-Dicke theory, provided that one and the same metric is employed for the physical space-time. Nevertheless, it is shown in this paper that by cosmological models the loop quantization in the two different frames leads to inequivalent effective theories. Analytical solutions are found in both frames for the effective loop quantum Brans-Dicke cosmology without potential in (i) the vacuum case and (ii) the additional massless scalar field case. In the Einstein frame, the analytical solution for the Brans-Dicke potential ??2 is found. In all of those solutions, the bouncing evolution of the scale factor is obtained around the Planck regime. The differences between the loop quantization of the two frames are reflected by (i) the evolution of the scale factor around the bounce and (ii) the scale of the bounce in the physical Jordan frame.

Artymowski, Micha?; Ma, Yongge; Zhang, Xiangdong

2013-11-01

182

An Interacting Model of Dark Energy in Brans-Dicke Theory  

NASA Astrophysics Data System (ADS)

In this paper it is shown that in non-minimally coupled Brans-Dicke theory containing a self-interacting potential, a suitable conformal transformation can automatically give rise to an interaction between the normal matter and the Brans-Dicke scalar field. Considering the scalar field in the Einstein frame as the quintessence matter, it has been shown that such a non-minimal coupling between the matter and the scalar field can give rise to a late time accelerated expansion for the universe preceded by a decelerated expansion for very high values of the Brans-Dicke parameter ?. We have also studied the observational constraints on the model parameters considering the Hubble and Supernova data.

Das, Sudipta; Al Mamon, Abdulla

2014-06-01

183

Path integral approach to the full Dicke model  

NASA Astrophysics Data System (ADS)

The full Dicke model describes a system of N identical two level-atoms coupled to a single mode quantized bosonic field. The model considers rotating and counter-rotating coupling terms between the atoms and the bosonic field, with coupling constants g1 and g2, for each one of the coupling terms, respectively. We study finite temperature properties of the model using the path integral approach and functional methods. In the thermodynamic limit, N??, the system exhibits phase transition from normal to superradiant phase, at some critical values of temperature and coupling constants. We distinguish between three particular cases, the first one corresponds to the case of rotating wave approximation, where g1?0 and g2=0, the second one corresponds to the case of g1=0 and g2?0, in these two cases the model has a continuous symmetry. The last one, corresponds to the case of g1?0 and g2?0, where the model has a discrete symmetry. The phase transition in each case is related to the spontaneous breaking of its respective symmetry. For each one of these three particular cases, we find the asymptotic behaviour of the partition function in the thermodynamic limit, and the collective spectrum of the system in the normal and the superradiant phase. For the case of rotating wave approximation, and also the case of g1=0 and g2?0, in the superradiant phase, the collective spectrum has a zero energy value, corresponding to the Goldstone mode associated to the continuous symmetry breaking of the model. Our analysis and results are valid in the limit of zero temperature, ???, in which, the model exhibits a quantum phase transition.

Alcalde, M. Aparicio; Pimentel, B. M.

2011-10-01

184

Higgs boson in the Brans-Dicke theory and the de sitter universe  

NASA Astrophysics Data System (ADS)

We consider a Higgs boson field coupled to Brans-Dicke gravity and calculate its contributions to the energy density and pressure in the Friedmann-Robertson-Walker spacetime. We seek de Sitter solutions for the cosmic scale factor with well-incorporated Higgs and Brans-Dicke fields and investigate the stability properties of the solutions by using a linear approximation. We discuss the possibility that the late-time acceleration and the inflationary era of our universe can be described by means of scalar fields with self-interactions and a Yukawa potential.

Lee, Sunnyeo; Sim, Jonghyun; Lee, Tae Hoon

2014-02-01

185

Husimi distribution and phase-space analysis of a Dicke-model quantum phase transition  

NASA Astrophysics Data System (ADS)

The Husimi distribution is proposed for a phase-space analysis of quantum phase transitions in the Dicke model of spin-boson interactions. We show that the inverse participation ratio and Wehrl entropy of the Husimi distribution give sharp signatures of the quantum phase transition. The analysis is done using two frameworks: a numerical treatment and an analytical variational approximation. Additionally, we propose a characterization of the Dicke model quantum phase transition by means of the zeros of the Husimi distribution in the variational approach.

Romera, E.; del Real, R.; Calixto, M.

2012-05-01

186

Spherically Symmetric Jordan-Brans-Dicke Quantum Gravity with de Broglie Bohm Pilot Wave Perspective  

NASA Astrophysics Data System (ADS)

We obtain two dimensional analogue of the Jordan-Brans-Dicke (JBD) gravity action described in four dimensional spherically symmetric curved space time metric. There will be two scalar fields, namely, the Brans Dicke (BD) ? and scale factor of 2-sphere part of the space time ?. We obtained suitable duality transformations between (?, ?) and (?, S) where ? and S is respectively amplitude and phase part of the corresponding de Broglie pilot wave function ? (? ,S)=?{? }e^{iS}. Covariant conservation of mass-energy current density of particles ensemble J a = ?? a S, is established by applying a particular dynamical conformal frame described by (?, S).

Ghaffarnejad, Hossein

2014-03-01

187

On static spherically symmetric solutions of the vacuum Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

It is shown that among the four classes of the static spherically symmetric solutions of the vacuum Brans-Dicke theory of gravity only two are really independent. Further, by matching exterior and interior (due to physically reasonable spherically symmetric matter source) scalar fields it is found that only the Brans class I solution with a certain restriction on the solution parameters may represent an exterior metric for a nonsingular massive object. The physical viability of the black hole nature of the solution is investigated. It is concluded that no physical black hole solution different from the Schwarzschild black hole is available in the Brans-Dicke theory.

Bhadra, Arunava; Sarkar, Kabita

2005-12-01

188

Henry Cavendish, Johann von Soldner, and the deflection of light  

NASA Astrophysics Data System (ADS)

The gravitational deflection of light based on Newtonian theory and the corpuscular model of light was calculated, but never published, around 1784 by Henry Cavendish, almost 20 years earlier than the first published calculation by Johann Georg von Soldner. The two results are slightly different because, while Cavendish treated a light ray emitted from infinity, von Soldner treated a light ray emitted from the surface of the gravitating body. At the first order of approximation, they agree with each other; both are one-half the value predicted by general relativity and confirmed by experiment.

Will, Clifford M.

1988-05-01

189

Jack bean ?-mannosidase (Jb?-man): tolerance to alkali, chelating and reducing agents and energetics of catalysis and inhibition.  

PubMed

Investigations of the catalytic and structural transitions of jack bean ?-mannosidase (Jb?-man) are described in the present paper. The enzyme was maximally stable at pH 5.0; however, when incubated in the pH range of 11.0-12.0, showed 1.3 times higher activity and also stability for longer time. The free amino group at or near the active site was probably involved in the stability and activation mechanism. The active site is constituted by the association of two unidentical subunits connected by disulfide linkages. The metalloenzyme has Zn(2+) ions tightly bound and chelation reduces the thermal stability of the protein. Energetics of catalysis and thermodynamics of inhibition of the enzyme were also carried out. PMID:21924285

Kumar, Avinash; Gaikwad, Sushama M

2011-12-01

190

Stellar explosion in the weak field approximation of the Brans–Dicke theory  

Microsoft Academic Search

We treat a very crude model of an exploding star, in the weak field approximation of the Brans–Dicke theory, in a scenario that resembles some characteristic data of a type Ia supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one magnitude

Victor H. Hamity; Daniel E. Barraco

2005-01-01

191

Stellar explosion in the weak field approximation of the Brans Dicke theory  

Microsoft Academic Search

We treat a very crude model of an exploding star, in the weak field approximation of the Brans Dicke theory, in a scenario that resembles some characteristic data of a type Ia supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one

Victor H. Hamity; Daniel E. Barraco

2005-01-01

192

Mechanical performance of the Dick internal fixator: a clinical study of 75 patients  

Microsoft Academic Search

A consecutive series of 75 patients with fractures of the thoracolumbar spine, stabilized with the Dick internal fixator, was studied retrospectively. Posttraumatic kyphosis was measured on the preoperative lateral radiograph by the Cobb angle and the wedge angle and the results were compared with angles measured on the radiographs after instrumentation and after removal of the implants. The presence and

P. M. Rommens; F. Weyns; F. Van Calenbergh; J. Goffin; P. L. Broos

1995-01-01

193

Pursuing "Moby-Dick" in the Classroom, the Museum, Back in the Classroom, and Beyond.  

ERIC Educational Resources Information Center

Describes a university course that explored the novel "Moby Dick" by Herman Melville and its relation to art highlighting the two student initiatives. Provides the opening statements from each of the 12 students at the National Association for Humanities Education Convention from their presentation on the course where they each related their…

Wallace, Robert K.; Zlatkin, Aaron; Hixson, Lindsay; Kallmeyer, Robert J.; Sekowski, Kristen; Brock, Gina R.; Gallagher, Michael; Fletcher, William Ryan

1997-01-01

194

Stable high-titer n-butanol production from sucrose and sugarcane juice by Clostridium acetobutylicum JB200 in repeated batch fermentations.  

PubMed

The production of n-butanol, a widely used industrial chemical and promising transportation fuel, from abundant, low-cost substrates, such as sugarcane juice, in acetone-butanol-ethanol (ABE) fermentation was studied with Clostridium acetobutylicum JB200, a mutant with high butanol tolerance and capable of producing high-titer (>20g/L) n-butanol from glucose. Although JB200 is a favorable host for industrial bio-butanol production, its fermentation performance with sucrose and sugarcane juice as substrates has not been well studied. In this study, the long-term n-butanol production from sucrose by JB200 was evaluated with cells immobilized in a fibrous-bed bioreactor (FBB), showing stable performance with high titer (16-20g/L), yield (?0.21g/g sucrose) and productivity (?0.32g/Lh) for 16 consecutive batches over 800h. Sugarcane thick juice as low-cost substrate was then tested in 3 consecutive batches, which gave similar n-butanol production, demonstrating that JB200 is a robust and promising strain for industrial ABE fermentation. PMID:24811445

Jiang, Wenyan; Zhao, Jingbo; Wang, Zhongqiang; Yang, Shang-Tian

2014-07-01

195

ADDENDUM I : HENRYS LAW CONSTANTS OF OH AND HO2.  

SciTech Connect

The Henry's law type constants of OH and HO{sub 2} have not been experimentally determined for obvious reasons: it is extremely difficult to measure the concentrations of these reactive species in either the gas phase or the aqueous phase, let alone simultaneously in both phases. At a more fundamental level, because these radicals react rapidly in both phases, compared with mass-transfer rates characterizing typical laboratory multi-phase systems, the gas-liquid equilibrium which is necessary for such measurements to be feasible is typically not attainable. Consequently, the Henry's law constants of these radicals are traditionally evaluated from the free energy of solution, {Delta}{sub sol}G{sup 0}(X) accompanying the process of transferring a molecule X from the gas phase, denoted g, to the aqueous phase, a, i.e. X{sub g} {rightleftharpoons} X{sub a} (9.10); using the equation {Delta}{sub sol}G{sup o}(X) = -RT ln k{sub H} (9.11); {Delta}{sub sol}G{sup o}(X) is defined as {Delta}{sub sol}G{sup o}(X) = {Delta}{sub f}G{sup o}(X){sub a} - {Delta}{sub f}G{sup o}(X){sub g} (9.12) where the free energies of formation of X in the gas phase and in the aqueous phase are typically evaluated using thermochemical cycles.

LEE,Y.N.

2003-05-23

196

Architect Henri Maclaine Pont: Een Speurtocht naar het Wezenlijke van de Javaanse Architectuur (Architect Henri Maclaine Pont: An Intensive Search on the Essence of Javanese Architecture).  

National Technical Information Service (NTIS)

Henri Maclaine Pont was born in 1884 in Meester Cornelis, a suburb of Batavia, the present Jakarta. The town quarter is now called Jantinegara. He finished his secondary school education and study for Architecture at the 'Technishche Hogeschool Delft' (TH...

B. R. van Leerdam

1995-01-01

197

Development of Monopole Interaction Models for Ionic Compounds. Part I: Estimation of Aqueous Henry?s Law Constants for Ions and Gas Phase pKa Values for Acidic Compounds  

EPA Science Inventory

The SPARC (SPARC Performs Automated Reasoning in Chemistry) physicochemical mechanistic models for neutral compounds have been extended to estimate Henry?s Law Constant (HLC) for charged species by incorporating ionic electrostatic interaction models. Combinations of absolute aq...

198

Visualizing the Life and Legacy of Henry VIII: Guiding Students with Eight Types of Graphic Organizers  

Microsoft Academic Search

Delving into the life and legacy of Henry VIII is both complex and captivating. People seem compelled to learn more abut his critical contributions and controversial conduct that range from the significant to the scandalous. Reflecting on the history of the world would be incomplete without investigating the events and escapades associated with Henry VIII, whose impact of 500 years

Nancy P. Gallavan; Ellen Kottler

2010-01-01

199

Estimation of Henry's Law Constant for a Diverse Set of Organic Compounds from Molecular Structure  

EPA Science Inventory

The SPARC (SPARC Performs Automated Reasoning in Chemistry) vapor pressure and activity coefficient models were coupled to estimate Henry?s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar organic compounds without modification or additional p...

200

Measurement of Henry's law constants for C⁠and Câ chlorinated hydrocarbons  

Microsoft Academic Search

A modification to the EPICS procedure for measuring Henry's constants is proposed, wherein the original assumption of equal solute mass additions to bottle pairs has been eliminated via a gravimetric accounting, resulting in increased precision. The modified procedure was applied to 13 volatile C⁠and Câ chlorinated hydrocarbons at temperatures from 10 to 35°C, representing a range in dimensionless Henry's

James M. Gossett

1987-01-01

201

From Classrooms to Careers: The Senior Mastery Process at Henry Ford Academy.  

ERIC Educational Resources Information Center

The Henry Ford Academy is the nations first charter school developed jointly by a global corporation, public education, and a non-profit cultural institution. The Senior Mastery Process at Henry Ford Academy is an innovative, challenging program of career exploration and research project for high school seniors. Beginning with initial job…

Parizek, Deborah; Kesavan, Sandy

202

15. Historic American Buildings Survey. Plan of Fort McHenry, by ...  

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

15. Historic American Buildings Survey. Plan of Fort McHenry, by William Tell Poussin, 1819. National Archives, Records of the War Department, Cartographic Section, Record Group 77, drawer 51, sheet 2. - Fort McHenry National Monument & Historic Shrine, East Fort Avenue at Whetstone Point, Baltimore, Independent City, MD

203

A Henry's Law Test for Experimental Partitioning Studies of Iron Meteorites  

NASA Technical Reports Server (NTRS)

Low-level doped solid metal/liquid metal experiments analyzed by laser ablation ICP-MS allow Henry's Law to be tested. The results indicate Henry's Law is obeyed and the experimental partition coefficients can be applied to iron meteorites. Additional information is contained in the original extended abstract.

Chabot, N. L.; Campbell, A. J.; Humayun, M.; Agee, C. B.

2001-01-01

204

The performance of UNIFAC and related group contribution models part II. Prediction of Henry's law constants  

Microsoft Academic Search

Henry's law constants for 24 different systems have been determined using UNIFAC and related group contribution models. The results obtained from original, modified and free-volume effect UNIFAC models are compared with experimental results. Empirical relationships for the temperature-dependency of Henry's constant for the chloroform(1)-water(2) system are also determined.

Sermin Örnektekin; Halime Ö. Paksoy; Ya?ar Demirel

1996-01-01

205

A general integral of the Jordan-Brans-Dicke field equations for static spherically symmetric perfect fluid distributions.  

NASA Astrophysics Data System (ADS)

The Jordan-Brans-Dicke field equations [1] contain the four-dimensional field equations of the five-dimensional projective unified theory. As it should be, Einstein's theory is incorporated as a limiting case. In this paper we present a method to determine explicitly for every static spherically symmetric solution of Einstein's theory with perfect fluid an analogous solution of Jordan-Brans-Dicke theory. As a particular example a “generalized interior Schwarzschild solution” is given.

Herlt, Eduard

1983-12-01

206

Henry's law constants of diacids and hydroxy polyacids: recommended values  

NASA Astrophysics Data System (ADS)

In spite of the importance of diacids and functionalised diacids for organic aerosol formation through aqueous-phase processes in droplets and aerosol water, there seems to be no reliable set of experimental values for their Henry's law constants (HLCs). We show that their estimation through the use of infinite dilution activity coefficients is also prone to error. Here we present HLC values for diacids and hydroxy polyacids determined from solubilities, water activities and vapour pressures of solids or solutions, by employing thermodynamic relationships. The vapour pressures are found to be the largest source of error, but the analysis of the obtained HLC points to inconsistencies among specific vapour pressure data sets. Although there is considerable uncertainty, the HLC defined as aqueous concentration per unit gaseous partial pressure of linear ?- and ?-diacids appear to be higher than estimated by the often cited review work of Saxena and Hildemann (1996).

Compernolle, S.; Müller, J.-F.

2014-03-01

207

Henry's law constants of diacids and hydroxypolyacids: recommended values  

NASA Astrophysics Data System (ADS)

In spite of the importance of diacids and functionalised diacids for organic aerosol formation through aqueous-phase processes in droplets and aerosol water, there seems to be no reliable set of experimental values for their Henry's law constants (HLC). We show that their estimation through the use of infinite dilution activity coefficients is also prone to error. Here we present HLC values for diacids and hydroxy polyacids determined from solubilities, water activities and vapour pressures of solids or solutions, by employing thermodynamic relationships. The vapour pressures are found to be the largest source of error, but the analysis of the obtained HLC points to inconsistencies among specific vapour pressure data sets. Although there is considerable uncertainty, the HLC of diacids appear to be higher than estimated by the often cited review work of Saxena and Hildemann (1996).

Compernolle, S.; Müller, J.-F.

2013-09-01

208

Scientific Biography of Henri Bénard (1874-1939)  

NASA Astrophysics Data System (ADS)

Henri Claude Bénard was born at Lieurey, a small French village in the region of Eure, in Normandy, on October 25 th , 1874. He was the only son of Felix A. Bénard (1851-1884) and Hélène M. Mangeant (1837-1901) [1-3]. His father was a small investor, who died very young. H. Bénard finished elementary school in the district of Lisieux and in Caen, nearby his birthplace, and moved to Paris to continue his studies at the Lycée Louis le Grand, one of the best high schools in France. In 1894, he succeeded in the highly competitive entrance examinations to the prestigious Ecole Normale Supérieure in Paris1. Indeed, this year, 17 students were selected from 307 candidates in the sciences section and 25 from 205 candidates in the humanities section [4].

Wesfreid, José Eduardo

209

Keldysh approach for nonequilibrium phase transitions in quantum optics: Beyond the Dicke model in optical cavities  

NASA Astrophysics Data System (ADS)

We investigate nonequilibrium phase transitions for driven atomic ensembles interacting with a cavity mode and coupled to a Markovian dissipative bath. In the thermodynamic limit and at low frequencies, we show that the distribution function of the photonic mode is thermal, with an effective temperature set by the atom-photon interaction strength. This behavior characterizes the static and dynamic critical exponents of the associated superradiance transition. Motivated by these considerations, we develop a general Keldysh path-integral approach that allows us to study physically relevant nonlinearities beyond the idealized Dicke model. Using standard diagrammatic techniques, we take into account the leading-order corrections due to the finite number N of atoms. For finite N, the photon mode behaves as a damped classical nonlinear oscillator at finite temperature. For the atoms, we propose a Dicke action that can be solved for any N and correctly captures the atoms’ depolarization due to dissipative dephasing.

Torre, Emanuele G. Dalla; Diehl, Sebastian; Lukin, Mikhail D.; Sachdev, Subir; Strack, Philipp

2013-02-01

210

Complete density perturbations in the Jordan-Fierz-Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

In the context of scalar-tensor theories we study the evolution of the density contrast for Jordan-Fierz-Brans-Dicke theories in a Friedmann-Lemaître-Robertson-Walker universe. Calculations are performed in the Einstein frame with the cosmological background described as ?-cold dark matter (?CDM) and supplemented by a Jordan-Fierz-Brans-Dicke field. By using a completely general procedure valid for all scalar-tensor theories, we obtain the exact fourth-order differential equation for the density contrast evolution in modes of arbitrary size. In the case of sub-Hubble modes, the expression reduces to a simpler but still fourth-order equation that is then compared with the standard (quasistatic) approximation. Differences with respect to the evolution as predicted by the standard concordance ?CDM model are observed depending on the value of the coupling.

Cembranos, J. A. R.; de la Cruz Dombriz, A.; Olano García, L.

2013-12-01

211

Collapse to black holes in Brans-Dicke theory. I. Horizon boundary conditions for dynamical spacetimes  

NASA Astrophysics Data System (ADS)

We present a new numerical code that evolves a spherically symmetric configuration of collisionless matter in the Brans-Dicke theory of gravitation. In this theory the spacetime is dynamical even in spherical symmetry, where it can contain gravitational radiation. Our code is capable of accurately tracking collapse to a black hole in a dynamical spacetime arbitrarily far into the future, without encountering either coordinate pathologies or spacetime singularities. This is accomplished by truncating the spacetime at a spherical surface inside the apparent horizon, and subsequently solving the evolution and constraint equations only in the exterior region. We use our code to address a number of long-standing theoretical questions about collapse to black holes in Brans-Dicke theory.

Scheel, Mark A.; Shapiro, Stuart L.; Teukolsky, Saul A.

1995-04-01

212

Hamiltonian formulation of Palatini f(R) theories a la Brans-Dicke theory  

SciTech Connect

We study the Hamiltonian formulation of f(R) theories of gravity both in metric and in Palatini formalism using their classical equivalence with Brans-Dicke theories with a nontrivial potential. The Palatini case, which corresponds to the {omega}=-3/2 Brans-Dicke theory, requires special attention because of new constraints associated with the scalar field, which is nondynamical. We derive, compare, and discuss the constraints and evolution equations for the {omega}=-3/2 and {omega}{ne}-3/2 cases. Based on the properties of the constraint and evolution equations, we find that, contrary to certain claims in the literature, the Cauchy problem for the {omega}=-3/2 case is well formulated and there is no reason to believe that it is not well posed in general.

Olmo, Gonzalo J.; Sanchis-Alepuz, Helios [Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia - CSIC, Facultad de Fisica, Universidad de Valencia, Burjassot-46100, Valencia (Spain) and Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid (Spain); Institut fuer Physik, Karl-Franzens-Universitaet Graz (Austria)

2011-05-15

213

Implementation of the dicke lattice model in hybrid quantum system arrays.  

PubMed

Generalized Dicke models can be implemented in hybrid quantum systems built from ensembles of nitrogen-vacancy (NV) centers in diamond coupled to superconducting microwave cavities. By engineering cavity assisted Raman transitions between two spin states of the NV defect, a fully tunable model for collective light-matter interactions in the ultrastrong coupling limit can be obtained. Our analysis of the resulting nonequilibrium phases for a single cavity and for coupled cavity arrays shows that different superradiant phase transitions can be observed using existing experimental technologies, even in the presence of large inhomogeneous broadening of the spin ensemble. The phase diagram of the Dicke lattice model displays distinct features induced by dissipation, which can serve as a genuine experimental signature for phase transitions in driven open quantum systems. PMID:25062180

Zou, L J; Marcos, D; Diehl, S; Putz, S; Schmiedmayer, J; Majer, J; Rabl, P

2014-07-11

214

Henry`s law solubilities and Setchenow coefficients for biogenic reduced sulfur species obtained from gas-liquid uptake measurements  

SciTech Connect

Biogenically produced reduced sulfur compounds, including dimethylsulfide (DMS, CH{sub 3}SCH{sub 3}), hydrogen sulfide (H{sub 2}S), carbon disulfide (CS{sub 2}), methyl mercaptan (CH{sub 3}SH), and carbonyl sulfide (OCS), are a major source of sulfur in the marine atmosphere. This source is estimated to contribute 25-40% of global sulfur emissions. These species and their oxidation products, dimethyl sulfoxide (DMSO), dimethyl sulfone (DMSO{sub 2}), and methane sulfonic acid (MSA), dominate the production of aerosol and cloud condensation nuclei (CCN) in the clean marine atmosphere. The multiphase chemical processes for these species must be understood in order to study the evolving role of combustion-produced sulfur oxides over the oceans. Using a newly developed bubble column apparatus, a series of aqueous phase uptake studies have been completed for the reduced sulfur species DMS, H{sub 2}S, CS{sub 2}, CH{sub 3}SH, and OCS. Aqueous phase uptake has been studied as a function of temperature (278-298 K), pH (1-14), H{sub 2}O{sub 2} concentration (0-1 M), NaCl concentration (0-5 M), and (NH{sub 4}){sub 2}SO{sub 4} concentration (0-4 M). The Henry`s law coefficients for CH{sub 3}SH and CS{sub 2} were determined for the first time, as were the Setchenow coefficients for all the species studied. 33 refs., 8 figs., 2 tabs.

De Bruyn, W.J.; Swartz, E.; Hu, J.H. [Boston College, Chestnut Hill, MA (United States)] [and others] [Boston College, Chestnut Hill, MA (United States); and others

1995-04-20

215

Interview with Dick Gephardt and Tom O’Donnell by Diane Dewhirst  

Microsoft Academic Search

Biographical NoteRichard Andrew “Dick” Gephardt was born on January 31, 1941, in St. Louis, Missouri. He earned a B.S. from Northwestern University in 1962 and a law degree from the University of Michigan Law School in 1965. He was active in local Democratic politics and city government until 1976, when he was elected the U.S. House of Representatives, representing Missouri’s

Richard Dick A Gephardt; Thomas Tom J ODonnell

2010-01-01

216

Comment on the Brans-Dicke-Bianchi type-I solution  

NASA Astrophysics Data System (ADS)

We should like to point out that the Brans-Dicke-Bianchi type-I vacuum solution recently given by Ram and Singh is wrong. The correct solution is nothing but a special case of the general BDT-Bianchi type-I solutions given by us recently (Lorenz-Petzold, 1984). It is the aim of this comment to rediscuss the corresponding field equations and to disprove the statement that the (correct) solution has no analogy in Einstein's theory.

Lorenz-Petzold, Dieter

1984-03-01

217

Dicke-narrowed spectral lines in carbon monoxide buffered by argon  

Microsoft Academic Search

The shapes and shifts of Dicke-narrowed spectral lines in CO-Ar are studied by comparing high-resolution measurements and theoretical calculations, for temperatures between 214 K and 324 K, and pressures between 0.025 atm and 1 atm. In particular, the existing difficulties in performing fully ab initio line shape calculations over this range of conditions are examined. Additionally, temperature-dependent collisional broadening, shifting,

Richard Andrew Wehr

2005-01-01

218

Are Black Holes in Brans-Dicke Theory Precisely the same as in General Relativity?  

NASA Astrophysics Data System (ADS)

We study a three-parameter family of solutions of the Brans-Dicke field equations. They are static and spherically symmetric. We find the range of parameters for which this solution represents a black hole different from the Schwarzschild one. We find a subfamily of solutions which agrees with experiments and observations in the solar system. We discuss some astrophysical applications and the consequences on the “no hair” theorems for black holes.

Campanelli, M.; Lousto, C. O.

219

Field of a charged particle in Brans-Dicke theory of gravitation  

NASA Astrophysics Data System (ADS)

Field equations in the Brans-Dicke scalar-tensor theory of gravitation are obtained for a static charged point mass with the aid of a spherically symmetric, conformally flat metric. A closed-form exact solution of the field equations is presented, and may be considered as describing the field due to a charged mass point at the origin surrounded by a scalar-tensor field in a conformally flat space.

Reddy, D. R. K.; Rao, V. U. M.

1981-08-01

220

General solutions for a static isotropic metric in the Brans-Dicke gravitational theory  

NASA Astrophysics Data System (ADS)

The complete set of vacuum solutions for the metric tensor of a static spherically symmetric field is given, some of these solutions showing the remarkable feature of not agreeing - even in first order - with the classically well-known weak-field solutions of the Brans-Dicke (B.D.) equations. The existence of a particular two-parameter family of solutions raises severe doubts about the so-called Machian aspect of B.D. theory.

van den Bergh, N.

1980-10-01

221

Horizon-entropy increase laws for spherically symmetric horizons in Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

We derive the horizon-entropy increase law for spherically symmetric quasi-local horizons in Brans-Dicke theory. The quasi-local horizons used do not marginally trap null rays, and hence are not apparent horizons or foliated by marginally trapped surfaces, but instead have instantaneously constant gravitational entropy in the outgoing null direction. The relation derived has a very direct comparison with the horizon-entropy increase law for event horizons.

Nielsen, Alex B.

2011-09-01

222

General solutions for the field of a charged particle in Brans-Dicke theory of gravitation  

NASA Astrophysics Data System (ADS)

The field equations in the Brans-Dicke (BD) scalar-tensor theory of gravitation are solved for a spherically symmetric metric. The solutions generalise earlier conformally flat results and may all be considered as describing the field of a charged mass point surrounded by a scalar-tensor field. The conformally flat solutions are shown to be not physically meaningful for 'standard' BD theory with 2(omega) + 3 greater than zero.

van den Bergh, N.

1983-07-01

223

Efficient basis for the Dicke model: I. Theory and convergence in energy  

NASA Astrophysics Data System (ADS)

An extended bosonic coherent basis has been shown by Chen et al (2008 Phys. Rev. A 78 051801) and Liu et al (2009 Phys. Rev. A 80 165308) to provide numerically exact solutions of the finite-size Dicke model. The advantages in employing this basis, as compared with the photon number (Fock) basis, are exhibited to be valid for a large region of the Hamiltonian parameter space by analyzing the converged values of the ground state energy.

Bastarrachea-Magnani, Miguel A.; Hirsch, Jorge G.

2014-04-01

224

Efficient basis for the Dicke model: II. Wave function convergence and excited states  

NASA Astrophysics Data System (ADS)

An extended bosonic coherent basis has been shown by Chen et al (2008 Phys. Rev. A 78 051801) and Liu T et al (2009 Phys. Rev. A 80 165308) to provide numerically exact solutions of the finite-size Dicke model. The advantages in employing this basis, as compared with the photon number (Fock) basis, are exhibited to be valid for a large region of the Hamiltonian parameter space and many excited states by analyzing the convergence in the wave functions.

Hirsch, Jorge G.; Bastarrachea-Magnani, Miguel A.

2014-04-01

225

Electrostatic potential of a point charge in a Brans-Dicke Reissner-Nordström field  

NASA Astrophysics Data System (ADS)

We consider the Brans-Dicke Reissner-Nordström spacetime in isotropic coordinates and the electrostatic field of an electric point charge placed outside its surface of inversion. We treat the static electric point charge as a linear perturbation on the Brans-Dicke Reissner-Nordström background. We develop a method based upon the Copson method to convert the governing Maxwell equation on the electrostatic potential generated by the static electric point charge into a solvable linear second-order ordinary differential equation. We obtain a closed-form fundamental solution of the curved-space Laplace equation arising from the background metric, which is shown to be regular everywhere except at the point charge and its image point inside the surface of inversion. We also develop a method that demonstrates that the solution does not contain any other charge that may creep into the region that lies beyond the surface of inversion and which is not covered by the isotropic coordinates. The Brans-Dicke Reissner-Nordström spacetime therefore is linearly stable under electrostatic perturbations. This stability result includes the three degenerate cases of the fundamental solution that correspond to the Brans Type 1, the Reissner-Nordström and the Schwarzschild background spacetimes.

Watanabe, M.; Lun, A. W. C.

2013-08-01

226

Symmetry adapted states and the quantum phase transition in the Dicke model  

SciTech Connect

We study the phase transition properties of the ground state of the Dicke model by means of a variational procedure together with the catastrophe formalism. The proposed variational state is the tensorial product of the SU(2) and Weyl coherent states, and the expectation value of the Dicke Hamiltonian with respect this state is calculated. The stability properties of the energy surface exhibit a phase transition from the normal to the super-radiant behavior of the two-level atoms, when {omega}-tilde{sub a{omega}}-tilde{sub F} = {+-}4{gamma}-tilde{sup 2}. At the same time, the analytic form of the ground state in terms of the minimum critical points of the system is obtained. The Dicke Hamiltonian is invariant under transformations of the point group C{sub 2} = {l_brace}I,exp(i{pi}{Lambda}-circumflex){r_brace}, with {Lambda} circumflex the excitation number operator. To restore this parity symmetry, we separate the variational proposed states into orthogonal even and odd components, which give rise to analytic expressions for the ground and first excited states. The fidelity of these projected variational states is verified by studying their overlap with the exact quantum results.

Castanos, O.; Nahmad-Achar, E.; Lopez-Pena, R.; Hirsch, J. G. [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico Apdo. Postal 70-543, Mexico D. F., C.P. 04510 (Mexico)

2010-12-23

227

Melting study of an alkali basalt JB-1 up to 12.5 GPa: behavior of potassium in the deep mantle  

NASA Astrophysics Data System (ADS)

In order to study the role of alkali elements in global mantle circulation, we studied melting phase relations of an alkali basalt JB-1 up to 12.5 GPa under dry conditions. Compatibility of Na and K in clinopyroxene solid solution changes dramatically in the studied pressure range. The liquidus clinopyroxene/meltpartition coefficient for Na2O increases from 0.08 at 1 atm to 2.0 at 10 GPa and that for K2O increases discontinuously at around 7 GPa. Subsolidus clinopyroxene of JB-1 contains over 1 wt.% K2O at pressures above 7 GPa, whereas it contains less than 0.1% at pressures below 5 GPa. Accordingly, subsolidus assemblage of the alkali basalt contains small amount of potassium feldspar up to 6 GPa but contains only clinopyroxene, garnet and coesite at pressures above 7 GPa. There is a huge temperature increase in the JB-1 solidus at pressures between 6 and 7.5 GPa where the subsolidus mineral assemblage changes. The geometry of the solidus curve indicates that partial melting of the alkali basaltic materials must occur at 6-7 GPa in adiabatically ascending mantle flow with broad range of potential mantle temperatures (PMT?1200°C). Origin of the occurrence of ultrapotassic magmas in continental alkali basalt provinces and that for mildly potassium rich magmas in ocean island provinces are discussed in the light of present experiments.

Tsuruta, Koji; Takahashi, Eiichi

1998-04-01

228

Henry's Law Constant of Organic Nitriles Measured with GC-FID  

NASA Astrophysics Data System (ADS)

Nitriles are important atmospheric VOCs that paly key roles in the atmospheric nitrogen cycle and secondary aerosol formation. Nitriles and their oxidation products also have serious health effects and thus are important air pollutants. Henry's law constant is an important physical and chemical parameter to determine how gas phase species participate into gas-to-particle conversion and cloud formation and affect human health. Yet, measurements of Henry's law constants of nitriles are entirely lacking. We have developed a simple measurement technique to detect Henry's law constants of organic compounds using gas chromatography flame ionization detector (GC-FID) coupled with a bubble column. In this presentation, we will show Henry's law constants of a number of atmospherically relevant organic nitrile compounds and their temperature dependence.

Brewer, B.; Gangoda, M.; Lee, S.

2012-12-01

229

HENRY'S FORK AND SNAKE RIVER BASIN, IDAHO - WATER QUALITY REPORT, 1973  

EPA Science Inventory

Reported problems in the Henrys Fork and Snake River Basin (17040202, 17040203, 17040201) include bacteria levels exceeding water quality standards, dissolved oxygen standards violations, and excessive algal blooms resulting in aesthetic problems and contributing to DO depression...

230

AR42J-B-13 cell: an expandable progenitor to generate an unlimited supply of functional hepatocytes.  

PubMed

Hepatocytes are the preparation of choice for Toxicological research in vitro. However, despite the fact that hepatocytes proliferate in vivo during liver regeneration, they are resistant to proliferation in vitro, do not tolerate sub-culture and tend to enter a de-differentiation program that results in a loss of hepatic function. These limitations have resulted in the search for expandable rodent and human cells capable of being directed to differentiate into functional hepatocytes. Research with stem cells suggests that it may be possible to provide the research community with hepatocytes in vitro although to date, significant challenges remain, notably generating a sufficiently pure population of hepatocytes with a quantitative functionality comparable with hepatocytes. This paper reviews work with the AR42J-B-13 (B-13) cell line. The B-13 cell was cloned from the rodent AR42J pancreatic cell line, express genes associated with pancreatic acinar cells and readily proliferates in simple culture media. When exposed to glucocorticoid, 75-85% of the cells trans-differentiate into hepatocyte-like (B-13/H) cells functioning at a level quantitatively similar to freshly isolated rat hepatocytes (with the remaining cells retaining the B-13 phenotype). Trans-differentiation of pancreatic acinar cells also appears to occur in vivo in rats treated with glucocorticoid; in mice with elevated circulating glucocorticoid and in humans treated for long periods with glucocorticoid. The B-13 response to glucocorticoid therefore appears to be related to a real pathophysiological response of a pancreatic cell to glucocorticoid. An understanding of how this process occurs and if it can be generated or engineered in human cells would result in a cell line with the ability to generate an unlimited supply of functional human hepatocytes in a cost effective manner. PMID:20685382

Wallace, Karen; Fairhall, Emma A; Charlton, Keith A; Wright, Matthew C

2010-12-30

231

PKM2 inhibitor shikonin suppresses TPA-induced mitochondrial malfunction and proliferation of skin epidermal JB6 cells.  

PubMed

Chemoprevention has been a pivotal and effective strategy during the skin cancer treatment. Using human skin normal and tumor samples, we demonstrated that both the expression and activity levels of pyruvate kinase M2 (PKM2) were higher in skin tumor tissues than normal tissues, suggesting that PKM2, one of important metabolic enzyme, might serve as a target for skin cancer prevention and/or therapy. Shikonin, a small-molecule active chemical, has been studied as an anti-cancer drug candidate in human cancer models. However, the mechanism of action and the chemopreventive potential of shikonin are unclear. Herein, we used the skin epidermal JB6 P+ cells and demonstrated that shikonin suppressed the tumor promoter 12-O-tetradecanoylphorbol 13-acetate (TPA) induced neoplastic cell transformation and PKM2 activation in the early stage of carcinogenesis. Mitochondrial functions were inhibited by TPA treatment, as indicated by reduced mitochondrial membrane potential and mitochondrial respiration, which were restored by shikonin. We also examined the levels of lactate as a glycolysis marker, and shikonin suppressed its increase caused by tumor promoter treatment. Modulation of cell metabolism by shikonin was associated with G2-M phase accumulation, and Fra-1 (a major subunit of activator protein 1 in skin tumorigenesis) downregulation. In addition, we demonstrated that AMP-activated protein kinase (AMPK), an energy sensor, which is inactivated by TPA, shikonin could reverse AMPK activity. These results suggest that shikonin bears chemopreventive potential for human skin cancers in which PKM2 is upregulated, which might be mediated by inhibiting oncogenic activation, PKM2 activation, and mitochondrial dysfunction. PMID:23255458

Li, Wenjuan; Liu, Joan; Zhao, Yunfeng

2014-05-01

232

Henry Ingersoll Bowditch and Oliver Wendell Holmes: stethoscopists and reformers.  

PubMed

Two Bostonians, Henry Ingersoll Bowditch (1808-1892) and Oliver Wendell Holmes (1809-1894), went to Paris for advanced medical training and came home ardent disciples of Pierre Charles Alexandre Louis, leader of the French school that derived its eminence from expert auscultation and careful correlation of bedside and autopsy findings. Both Bowditch and Holmes became leaders in 19th-century American medicine. Bowditch, a successful practitioner and prolific medical writer, wrote the first important American text on physical examination and became our first specialist in pulmonary disease. He pioneered in the public health movement, was a charter member and later president of the American Medical Association, and was an abolitionist and an advocate for equal rights for women in medicine. Holmes left practice to become a medical educator. As Dean of Harvard Medical School, he tried unsuccessfully to admit white women and free black men to the school. Although his greatest fame came as a man of letters, Holmes considered himself first a physician and medical educator, and was justifiably proud of his definitive study, "The Contagiousness of Puerperal Fever" (1843). Today, Bowditch and Holmes are little appreciated as pioneers and reformers, but we remain in debt to them both. PMID:12388886

Felts, John H

2002-01-01

233

The Works of Henry Moseley, 1887-1915  

NASA Astrophysics Data System (ADS)

In 1913 Henry Moseley, an unknown young English physicist published an article in the Philosophical Magazine under the title of ``The High Frequency Spectra of the Elements.'' The 10-page article was to have far reaching implications in both chemistry and physics and helped to resolve a major conundrum in the periodic table of the elements. The talk will briefly examine the life and work of Moseley who died tragically while fighting in the trenches of World War I in 1915. The build-up to the discovery of atomic number took several different avenues including contributions from Rutherford and Barkla. However the more direct motivation for Moseley's work, as he readily acknowledged, were the articles of an unknown Dutch econometrician Anton Van den Broek who attempted to improve on Mendeleev's periodic table. Moseley began as a student of Rutherford at Manchester and took a keen interest in the development of research using X-rays following the work of Roentgen, von Laue and Bragg. Although Rutherford was at first reluctant to enter this new field he soon yielded to young Moseley's request and sent him to Leeds for brief training with Bragg. On returning to Manchester, Moseley devised an ingenious apparatus in which a set of metal samples could be rotated so as to become the target for a beam of electrons in order to measure the frequencies of the emitted K X-rays. The first set of such experiments used nine successive elements in the periodic table, from titanium to zinc. Moseley's now immense fame rests with the results of this study as well as a subsequent one which extended the study into a further 30 elements, in addition to the use that his method was put to by himself as well as subsequent chemists and physicists.

Scerri, Eric

2013-04-01

234

A path integral approach to the full Dicke model with dipole-dipole interaction  

NASA Astrophysics Data System (ADS)

We consider the full Dicke spin-boson model composed by a single bosonic mode and an ensemble of N identical two-level atoms with different couplings for the resonant and anti-resonant interaction terms, and incorporate a dipole-dipole interaction between the atoms. Assuming that the system is in thermal equilibrium with a reservoir at temperature ?-1, we compute the free energy in the thermodynamic limit N ? ? in the saddle-point approximation to the path integral and determine the critical temperature for the super-radiant phase transition. In the zero temperature limit, we recover the critical coupling of the quantum phase transition, presented in the literature.

Aparicio Alcalde, M.; Stephany, J.; Svaiter, N. F.

2011-12-01

235

Exact Brans-Dicke-Bianchi type-VII(h) perfect fluid solutions  

NASA Astrophysics Data System (ADS)

Exact perfect fluid solutions are obtained for the Brans-Dicke-Bianchi type VII(h) model (Ryan and Shapley, 1975). The rescaled method of Chauvet and Guzman (1986) is used under the assumption of locally rotational symmetry. For the stiff matter case, a singularity is found for t = 0 and the solution is different than that obtained by Lorentz-Petzold (1984). Exact cosmological solutions for an arbitrary barotropic perfect fluid are found by the introduction of a power law for the cosmic scale functions Ri = R sub i(t).

Guzman, E.

1989-02-01

236

Probing the quantum phase transition in the Dicke model through mechanical vibrations  

SciTech Connect

This paper is concerned with quantum dynamics of a system coupled to a critical reservoir. In this context, we employ the Dicke model which is known to exhibit a superradiant quantum phase transition (QPT) and we allow one of the mirrors to move under a linear restoring force. The electromagnetic field couples to the movable mirror through radiation pressure just like in typical optomechanical setups. We show that, in the thermodynamical limit, the superradiant phase induces a classical driving force on the mirror without causing decoherence.

Santos, J. P.; Semiao, F. L.; Furuya, K. [Departamento de Fisica, Universidade Estadual de Ponta Grossa, Campus Uvaranas, 84030-900 Ponta Grossa, Parana (Brazil); Instituto de Fisica 'Gleb Wataghin', Universidade Estadual de Campinas-UNICAMP, 13083-859, Campinas, SP (Brazil)

2010-12-15

237

Dynamical System Analysis for Anisotropic Universe in Brans-Dicke Theory  

NASA Astrophysics Data System (ADS)

In this work, we have studied the Brans-Dicke (BD) cosmology in anisotropic models. We present three dimensional dynamical system describing the evolution of anisotropic models containing perfect fluid and BD scalar field with self-interacting potential. The relevant equations have been transformed into the dynamical system. The critical points and the corresponding eigen values have been found in radiation, dust, dark energy, ?CDM and phantom phases of the universe. The natures and the stability around the critical points have also been investigated.

Bhadra, Jhumpa; Chakraborty, Shuvendu; Debnath, Ujjal

2013-09-01

238

Induction of miR-21-PDCD4 signaling by tungsten carbide-cobalt nanoparticles in JB6 cells involves ROS-mediated MAPK pathways.  

PubMed

Tungsten carbide-cobalt (WC-Co) nanoparticle composites have wide applications because of their hardness and toughness. WC-Co was classified as "probably carcinogenic" to humans by the International Agency for Research on Cancer (IARC) in 2003. It is believed that the toxicity and carcinogenesis of WC-Co is associated with particle size. Recent studies demonstrated that the tumor suppressor gene programmed cell death 4 (PDCD4) and its upstream regulator miR-21 have been considered as oncogenes for novel cancer prevention or anticancer therapies. The present study examined the effects of WC-Co nanoparticles on miR-21-PDCD4 signaling in a mouse epidermal cell line (JB6 P+). The results showed that (i) exposure of JB6 cells to WC-Co stimulated a increase of miR-21 generation; (ii) WC-Co also caused inhibition of PDCD4, a tumor suppressor protein and downstream target of miR-21, expression in JB6 cells; (iii) inhibition of ERKs with ERK inhibitor U0126 significantly reversed WC-Cominus;induced PDCD4 inhibition, but inhibition of p38 with p38 inhibitor SB203580 did not; and (iv) ROS scavengers, N-acetyl-L-cysteine and catalase, blocked the inhibitory effect of WC-Co on PDCD4 expression, while superoxide dismutase promoted the inhibitory effect. These findings demonstrate that WC-Co nanoparticles induce miR-21 generation, but inhibit PDCD4 production, which may be mediated through ROS, especially endogenous H2O2, and ERK pathways. Unraveling the complex mechanisms associated with these events may provide insights into the initiation and progression of WC-Co-induced carcinogenesis. PMID:23758151

Hou, Lichao; Bowman, Linda; Meighan, Terence G; Shi, Xianglin; Ding, Min

2013-01-01

239

Silibinin inhibits ultraviolet B radiation-induced DNA-damage and apoptosis by enhancing interleukin-12 expression in JB6 cells and SKH-1 hairless mouse skin.  

PubMed

Recent studies have demonstrated silibinin efficacy against ultraviolet B (UVB)-induced skin carcinogenesis via different mechanisms in cell lines and animal models; however, its role in regulating interleukin-12 (IL-12), an immunomodulatory cytokine that reduces UVB-induced DNA damage and apoptosis, is not known. Here, we report that UVB irradiation causes caspase 3 and PARP cleavage and apoptosis, and addition of recombinant IL-12 or silibinin immediately after UVB significantly protects UVB-induced apoptosis in JB6 cells. IL-12 antibody-mediated blocking of IL-12 activity compromised the protective effects of both IL-12 and silibinin. Both silibinin and IL-12 also accelerated the repair of UVB-caused cyclobutane-pyrimidine dimers (CPDs) in JB6 cells. Additional studies confirmed that indeed silibinin causes a significant increase in IL-12 levels in UVB-irradiated JB6 cells as well as in mouse skin epidermis, and that similar to cell-culture findings, silibinin topical application immediately after UVB exposure causes a strong protection against UVB-induced TUNEL positive cells in epidermis possibly through a significantly accelerated repair of UVB-caused CPDs. Together, these findings for the first time provide an important insight regarding the pharmacological mechanism wherein silibinin induces endogenous IL-12 in its efficacy against UVB-caused skin damages. In view of the fact that an enhanced endogenous IL-12 level could effectively remove UVB-caused DNA damage and associated skin cancer, our findings suggest that the use of silibinin in UVB-damaged human skin would also be a practical and translational strategy to manage solar radiation-caused skin damages as well as skin cancer. PMID:23359305

Narayanapillai, Sreekanth; Agarwal, Chapla; Deep, Gagan; Agarwal, Rajesh

2014-06-01

240

Henry Daniel Cogswell, DDS (1819-1900): a temperance advocate, philanthropist and builder of ice-water fountains.  

PubMed

Henry Daniel Cogswell (Fig. 1), the second of five children, was born in Tolland, Connecticut on March 3, 1819. His father, George Washington Cogswell, was a general carpenter, architect and builder of moderate circumstances. In 1827, when Henry was eight, his mother died. The following year, Henry's father moved to Orwell, (Oswego County) New York, in hopes of improving his financial condition. Henry was left behind in the care of his paternal grandfather, who died several months later, leaving the 10-year old boy, stranded and forced to rely upon his own resources. (In those times, when families were separated, individual members had limited means of locating one another.) PMID:10686912

Christen, A G; Theobald, M S; Christen, J A

1999-07-01

241

Stellar explosion in the weak field approximation of the Brans Dicke theory  

NASA Astrophysics Data System (ADS)

We treat a very crude model of an exploding star, in the weak field approximation of the Brans Dicke theory, in a scenario that resembles some characteristic data of a type Ia supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one magnitude from that maximum. This characteristic has become one of the most accurate methods to measure luminosity distances to objects at cosmological distances (Phillips M M 1993 Astrophys. J. 413 L105; see www.all-science-fair-projects.com/science_fair_projects_encyclopedia/Supernova, for a brief description of supernovae types). An interesting result is that the active mass associated with the scalar field is totally radiated to infinity, representing a mass loss in the ratio of the 'tensor' component to the scalar component of 1 to (2? + 3) (? is the Brans Dicke parameter), in agreement with a general result of Hawking (1972 Commun. Math. Phys. 25 167). Then, this model shows explicitly, in a dynamical case, the mechanism of the radiation of a scalar field, which is necessary to understand the Hawking result.

Hamity, Victor H.; Barraco, Daniel E.

2005-10-01

242

Bose–Einstein condensation versus Dicke–Hepp–Lieb transition in an optical cavity  

SciTech Connect

We provide an exact solution for the interplay between Bose–Einstein condensation and the Dicke–Hepp–Lieb self-organization transition of an ideal Bose gas trapped inside a single-mode optical cavity and subject to a transverse laser drive. Based on an effective action approach, we determine the full phase diagram at arbitrary temperature, which features a bi-critical point where the transitions cross. We calculate the dynamically generated band structure of the atoms and the associated suppression of the critical temperature for Bose–Einstein condensation in the phase with a spontaneous periodic density modulation. Moreover, we determine the evolution of the polariton spectrum due to the coupling of the cavity photons and the atomic field near the self-organization transition, which is quite different above or below the Bose–Einstein condensation temperature. At low temperatures, the critical value of the Dicke–Hepp–Lieb transition decreases with temperature and thus thermal fluctuations can enhance the tendency to a periodic arrangement of the atoms. -- Highlights: •Atoms inside a driven cavity can undergo two transitions: self-organization and BEC. •The phase diagram has four phases which coexist at a bi-critical point. •Atom–cavity coupling creates a dynamical lattice for the atoms. •Finite temperature can enhance the tendency towards self-organization. •We calculate the detailed spectrum of the polaritonic excitations.

Piazza, Francesco, E-mail: francesco.piazza@ph.tum.de [Technische Universität München, James-Franck-Straße 1, 85748 Garching (Germany)] [Technische Universität München, James-Franck-Straße 1, 85748 Garching (Germany); Strack, Philipp [Department of Physics, Harvard University, Cambridge MA 02138 (United States)] [Department of Physics, Harvard University, Cambridge MA 02138 (United States); Zwerger, Wilhelm [Technische Universität München, James-Franck-Straße 1, 85748 Garching (Germany)] [Technische Universität München, James-Franck-Straße 1, 85748 Garching (Germany)

2013-12-15

243

Spherically symmetric thin shells in Brans-Dicke theory of gravity  

SciTech Connect

The dynamics of spherically symmetric thin shells (or bubbles) is studied in the framework of the Brans-Dicke theory of gravity, using the Newman-Penrose formalism. The Brans-Dicke (BD) gravitational field equations on the bubble wall are given explicitly in terms of the discontinuities of the metric coefficients and the BD scalar field. Consequently, once the space-time geometry outside of the wall is given, these equations, together with the equation of state of the wall, uniquely determine the motion of the bubble. Using the generalized'' Bianchi identities, the interaction of a bubble with gravitational and matter fields is investigated. In particular, it is found that a bubble does not interact with an electromagnetic field, but it does with a scalar field or a fluid. The attraction and repulsion of a bubble are also studied. Exact solutions are constructed, and it is found that some of these solutions represent wormholes. However, these wormholes are different from the ones in Einstein's theory of gravity, in the sense that the throats of the wormholes are not necessarily built with exotic'' matter.

Letelier, P.S.; Wang, A. (Departamento de Matematica Aplicada, Instituto de Matematica Estatistica e Ciencia da Computacao, Universidade Estadual de Campinas, 13081-970 Campinas, Sao Paulo (Brazil))

1993-07-15

244

Spherically symmetric thin shells in Brans-Dicke theory of gravity  

NASA Astrophysics Data System (ADS)

The dynamics of spherically symmetric thin shells (or bubbles) is studied in the framework of the Brans-Dicke theory of gravity, using the Newman-Penrose formalism. The Brans-Dicke (BD) gravitational field equations on the bubble wall are given explicitly in terms of the discontinuities of the metric coefficients and the BD scalar field. Consequently, once the space-time geometry outside of the wall is given, these equations, together with the equation of state of the wall, uniquely determine the motion of the bubble. Using the ``generalized'' Bianchi identities, the interaction of a bubble with gravitational and matter fields is investigated. In particular, it is found that a bubble does not interact with an electromagnetic field, but it does with a scalar field or a fluid. The attraction and repulsion of a bubble are also studied. Exact solutions are constructed, and it is found that some of these solutions represent wormholes. However, these wormholes are different from the ones in Einstein's theory of gravity, in the sense that the throats of the wormholes are not necessarily built with ``exotic'' matter.

Letelier, Patricio S.; Wang, Anzhong

1993-07-01

245

Non-Dicke decay in a small spherical sample with radially varying density  

NASA Astrophysics Data System (ADS)

It is a familiar fact that, in an isolated sphere or ellipsoid of uniform polarization density, the electrostatic field also is uniform. Because of this, the state of uniform polarization in a spherical sample of uniformly distributed two-level atoms is an eigenmode of the coherent decay process in the limit of a small radius compared to the resonant wavelength of a single atom. Consequently, in this special geometry, the Dicke picture of uniform exponential decay should hold. In nonspheroidal geometries or in spherical geometries with nonuniform atomic density, the decay should be more complicated. Here, we find the characteristic equations that determine the eigenmodes of the Lienard-Wiechert interaction for a partly hollowed sphere of identical two-level atoms in two different radial configurations. We show that the Dicke picture for emission from a coherently prepared sample does not correctly describe the system's dynamics even when we take the radius of the sphere to be much smaller than the radiation wavelength.

Friedberg, Richard; Manassah, Jamal T.

2012-01-01

246

Bose-Einstein condensation versus Dicke-Hepp-Lieb transition in an optical cavity  

NASA Astrophysics Data System (ADS)

We provide an exact solution for the interplay between Bose-Einstein condensation and the Dicke-Hepp-Lieb self-organization transition of an ideal Bose gas trapped inside a single-mode optical cavity and subject to a transverse laser drive. Based on an effective action approach, we determine the full phase diagram at arbitrary temperature, which features a bi-critical point where the transitions cross. We calculate the dynamically generated band structure of the atoms and the associated suppression of the critical temperature for Bose-Einstein condensation in the phase with a spontaneous periodic density modulation. Moreover, we determine the evolution of the polariton spectrum due to the coupling of the cavity photons and the atomic field near the self-organization transition, which is quite different above or below the Bose-Einstein condensation temperature. At low temperatures, the critical value of the Dicke-Hepp-Lieb transition decreases with temperature and thus thermal fluctuations can enhance the tendency to a periodic arrangement of the atoms.

Piazza, Francesco; Strack, Philipp; Zwerger, Wilhelm

2013-12-01

247

Interacting new agegraphic dark energy in nonflat Brans-Dicke cosmology  

SciTech Connect

We construct a cosmological model of late acceleration based on the new agegraphic dark energy model in the framework of Brans-Dicke cosmology where the new agegraphic energy density {rho}{sub D}=3n{sup 2}m{sub p}{sup 2}/{eta}{sup 2} is replaced with {rho}{sub D}=3n{sup 2{phi}2}/(4{omega}{eta}{sup 2}). We show that the combination of the Brans-Dicke field and agegraphic dark energy can accommodate a w{sub D}=-1 crossing for the equation of state of noninteracting dark energy. When an interaction between dark energy and dark matter is taken into account, the transition of w{sub D} to the phantom regime can be more easily accounted for than when we resort to the Einstein field equations. In the limiting case {alpha}=0 ({omega}{yields}{infinity}), all previous results of the new agegraphic dark energy in Einstein gravity are restored.

Sheykhi, Ahmad [Department of Physics, Shahid Bahonar University, P.O. Box 76175, Kerman (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of)

2010-01-15

248

Cosmological constraints on ghost dark energy in the Brans-Dicke theory by using MCMC approach  

NASA Astrophysics Data System (ADS)

By using a Markov Chain Monte Carlo simulation, we investigate cosmological constraints on the ghost dark energy (GDE) model in the framework of the Brans-Dicke (BD) theory. A combination of the latest observational data of the cosmic microwave background radiation data from seven-year WMAP, the baryon acoustic oscillation data form the SDSS, the supernovae type Ia data from the Union2 and the X-ray gas mass fraction data from the Chandra X-ray observations of the largest relaxed galaxy clusters are used to perform constraints on GDE in the BD cosmology. In this paper, we consider both flat and non-flat universes together with interaction between dark matter and dark energy. The main cosmological parameters are obtained as: ?bh2=0.0223-0.0013+0.0016, ?ch2=0.1149-0.0104+0.0088 and ?k=0.0005-0.0073+0.0025. In addition, the Brans-Dicke parameter ? is estimated as 1/??0.002.

Alavirad, Hamzeh; Sheykhi, Ahmad

2014-06-01

249

Integration of Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry and Molecular Cloning for the Identification and Functional Characterization of Mobile ortho-Halobenzoate Oxygenase Genes in Pseudomonas aeruginosa Strain JB2  

PubMed Central

Protein mass spectrometry and molecular cloning techniques were used to identify and characterize mobile o-halobenzoate oxygenase genes in Pseudomonas aeruginosa strain JB2 and Pseudomonas huttiensis strain D1. Proteins induced in strains JB2 and D1 by growth on 2-chlorobenzoate (2-CBa) were extracted from sodium dodecyl sulfate-polyacrylamide gel electrophoresis gels and analyzed by matrix-assisted laser desorption ionization–time of flight mass spectrometry. Two bands gave significant matches to OhbB and OhbA, which have been reported to be the ? and ? subunits, respectively, of an ortho-1,2-halobenzoate dioxygenase of P. aeruginosa strain 142 (T. V. Tsoi, E. G. Plotnikova, J. R. Cole, W. F. Guerin, M. Bagdasarian, and J. M. Tiedje, Appl. Environ. Microbiol. 65:2151–2162, 1999). PCR and Southern hybridization experiments confirmed that ohbAB were present in strain JB2 and were transferred from strain JB2 to strain D1. While the sequences of ohbA from strains JB2, D1, and 142 were identical, the sequences of ohbB from strains JB2 and D1 were identical to each other but differed slightly from that of strain 142. PCR analyses and Southern hybridization analyses indicated that ohbAB were conserved in strains JB2 and D1 and in strain 142 but that the regions adjoining these genes were divergent. Expression of ohbAB in Escherichia coli resulted in conversion of o-chlorobenzoates to the corresponding (chloro)catechols with the following apparent affinity: 2-CBa ? 2,5-dichlorobenzoate > 2,3,5-trichlorobenzoate > 2,4-dichlorobenzoate. The activity of OhbABJB2 appeared to differ from that reported for OhbAB142 primarily in that a chlorine in the para position posed a greater impediment to catalysis with the former. Hybridization analysis of spontaneous 2-CBa? mutants of strains JB2 and D1 verified that ohbAB were lost along with the genes, suggesting that all of the genes may be contained in the same mobile element. Strains JB2 and 142 originated from California and Russia, respectively. Thus, ohbAB and/or the mobile element on which they are carried may have a global distribution.

Hickey, W. J.; Sabat, G.

2001-01-01

250

Assessment of water-quality conditions in the J.B. Converse Lake watershed, Mobile County, Alabama, 1990-98  

USGS Publications Warehouse

J.B. Converse (Converse) Lake is a 3,600-acre, tributary-storage reservoir in Mobile County, southwestern Alabama. The lake serves as the primary drinking-water supply for the city of Mobile. The Converse Lake watershed lies within the Coastal Plain Physiographic Province. Semiconsolidated to unconsolidated sediments of sand, silt, gravel, and clay underlie the watershed, and are covered by acidic soils. Land use in the watershed is mainly forest (64 percent) and agriculture (31 percent). Residential and commercial development account for only 1 percent of the total land use in the watershed. Converse Lake receives inflow from seven major tributaries. The greatest inflows are from Big Creek, Crooked Creek, and Hamilton Creek that had mean annual streamflows of 72.2, 19.4, and 25.0 cubic feet per second, respectively, for the period 1990 to 1998, which represents about 72 percent of the total annual streamflow to the lake. The total mean annual inflow to the lake is estimated to be about 163 cubic feet per second. In general, water quality in Converse Lake and its tributaries meets the criteria established by the Alabama Department of Environmental Management (ADEM) for drinking-water supplies, whole-body contact, and aquatic life. The exceptions include acidic pH levels, iron and manganese levels above secondary or aesthetic criteria, and fecal bacterial levels in some tributaries above whole-body contact (swimmable) criteria. The pH levels throughout the watershed were commonly below the criteria level of 6.0, but this appears to have been a naturally occurring phenomenon caused by poorly buffered soil types, resistant sediments, and forested land use. Median iron and manganese levels were above aesthetic criteria levels of 300 and 50 micrograms per liter, respectively, in some tributaries. All tributary sites in the Converse Lake watershed had median and minimum dissolved-oxygen concentrations above the ADEM criteria level of 5 milligrams per liter except for Boggy Branch, which had a minimum dissolved-oxygen concentration of 3.7 milligrams per liter. The degree to which nutrient contributions from tributaries were causing nutrient enrichment and eutrophication in Converse Lake was assessed. Trend analysis detected little or no change in nutrient concentrations at the tributary and lake sites in the Converse Lake watershed from the 1991 to 1998 water years. Nutrient concentrations at most tributary sites exhibited a significant, positive relation with streamflow that indicated the dominant source of nutrient input to the watershed is from nonpoint contributions. From 1990 to 1998, computed mean annual loads of 75,400 kilograms of total nitrogen, 36,950 kilograms of total Kjeldahl nitrogen, 28,870 kilograms of total inorganic nitrogen, and 3,480 kilograms of total phosphorus were contributed to the lake by Big Creek, Hamilton Creek, and Crooked Creek combined. These mean annual loads of nutrients corresponded to borderline eutrophic/mesotrophic conditions in the lake. Of the combined loads, 62 percent of the total nitrogen, 70 percent of the total Kjeldahl nitrogen, 54 percent of the total inorganic nitrogen, and 47 percent of the total phosphorus originated from the forested subbasin of Big Creek. The more residential and agricultural subbasins of Crooked Creek and Hamilton Creek, however, yielded over twice the total phosphorus load per hectare of land use. Crooked and Hamilton Creek subbasins also had higher yields of the more bioavailable total inorganic nitrogen. A simplistic empirical model could not explain the relation between year-to-year nutrient contributions to Converse Lake from the tributaries and the lake's ability to assimilate those contributions. The potential presence of pathogens in the lake and its tributaries was assessed based on fecal bacterial concentrations. Fecal bacterial concentrations at some tributary sites were above existing criteria for swimmable uses. Contributions of fecal bacte

Journey, Celeste A.; Gill, Amy C.

2001-01-01

251

Scalar-type gravitational wave emission from gravitational collapse in Brans-Dicke theory: Detectability by a laser interferometer  

NASA Astrophysics Data System (ADS)

To investigate the possibility of obtaining evidence for scalar-tensor theories of gravity by laser interferometric gravitational wave observatories (e.g., LIGO), we perform numerical simulations of the gravitational collapse of a spherically symmetric dust fluid and investigate the waveform and amplitude of scalar-type gravitational waves (SGW's) in the Brans-Dicke theory, which is one of the simplest scalar-tensor theories. We find that in the case of the dust collapse of mass ~10Msolar and initial radius ~100-1000 km, the emitted SGW's have a maximum amplitude ~10-22(500/?)(10 Mpc/R) and a characteristic frequency ~40-1000 Hz. This means that if the gravity theory is the Brans-Dicke theory with ?<~ several thousands, the advanced LIGO may detect a signal of SGW's from a supernova at the Virgo cluster. And, if we happen to find a supernova in our Galaxy, we may detect SGW's even if ? is as large as ~106. Concerning cosmic censorship, we also investigate the fate of a collapsed object. Our numerical results suggest that the final product of a collapsed object is a black hole in the Brans-Dicke theory like in the Einstein theory, and outside the black hole, the Brans-Dicke scalar field seems to become constant. These results support the cosmic censorship conjecture.

Shibata, Masaru; Nakao, Kenichi; Nakamura, Takashi

1994-12-01

252

Three-dimensional pin-to-pin analyses of VVER-440 cores by the MOBY-DICK code  

SciTech Connect

Nuclear design for the Dukovany (EDU) VVER-440s nuclear power plant is routinely performed by the MOBY-DICK system. After its implementation on Hewlett Packard series 700 workstations, it is able to perform routinely three-dimensional pin-to-pin core analyses. For purposes of code validation, the benchmark prepared from EDU operational data was solved.

Lehmann, M.; Mikolas, P.

1994-12-31

253

Two novel glycosides from the fruits of Morinda citrifolia (noni) inhibit AP-1 transactivation and cell transformation in the mouse epidermal JB6 cell line.  

PubMed

The fruit juice of Morinda citrifolia (noni), a plant originally grown in the Hawaiian and Tahitian islands, has long been used by islanders to treat diseases, including cancer. Two novel glycosides, 6-O-(beta-D-glucopyranosyl)-1-O-octanoyl-beta-D-glucopyranose and asperulosidic acid, extracted from the juice of noni fruits, were used to examine their effects on 12-O-tedtradecanoylphorbol-13-acetate (TPA)- and epidermal growth factor (EGF)-induced AP-1 transactivation and cell transformation in mouse epidermal JB6 cells. The results indicated that both compounds were effective in suppressing TPA- or EGF-induced cell transformation and associated AP-1 activity. TPA- or EGF-induced phosphorylation of c-Jun, but not extracellular signal-regulated kinases or p38 kinases, was also blocked by the compounds, indicating that c-Jun N-terminal kinases were critical in mediating TPA- or EGF-induced AP-1 activity and subsequent cell transformation in JB6 cells. PMID:11479211

Liu, G; Bode, A; Ma, W Y; Sang, S; Ho, C T; Dong, Z

2001-08-01

254

Agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers Local 1650, 1987-1990.  

ERIC Educational Resources Information Center

This collective bargaining agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers establishes conditions of employment for all full-time teachers, counselors, librarians, placement officers, and selected other professional personnel. The articles in the agreement set…

Henry Ford Community Coll., Dearborn, MI.

255

Agreement Between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers, Local 1650, 1973-75.  

ERIC Educational Resources Information Center

This agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers, Local 1650 covers the period of 1973-1975. Contents of the agreement cover recognition, board of trustee rights, union-board relations, conditions of employment, seniority, the…

Henry Ford Community Coll., Dearborn, MI.

256

Prediction of Henry's law constants of triazine derived herbicides from quantum chemical continuum solvation models.  

PubMed

The Henry's law constants (H) for triazine derived herbicides are calculated using quantum chemical solvation models, SM2, SM3, PCM-DFT, and CPCM-DFT, and their performances are discussed. The results show considerable differences in performance among the different levels of theory. The values of H calculated by the semiempirical methods agree much better with the experimental values than those obtained at the DFT level. The differences are discussed in terms of the different contributions, electrostatic and no-electrostatic, to Gibbs free energy of solvation. In addition, the Henry's law constants of some triazine derived herbicides whose values have not been reported earlier are predicted as well. PMID:12870915

Delgado, Eduardo J; Alderete, Joel B

2003-01-01

257

[The praise of the leak: a tribute to Henri Laborit (1914-1995)].  

PubMed

Henri Laborit (1914-1995) was a French military MD. He contributed to the discovery of an important molecule that has changed the face of psychiatry, namely chlorpromazine, which became the first drug in the class of first-generation antipsychotics, which later led to the dopamine hypothesis of schizophrenia. He did not receive the Nobel Prize for this discovery, unlike Daniel Bovet who get the Nobel Prize for the discovery of antihistaminics. Henri Laborit is also the author of a book that has contributed to the popularization of neurosciences in France, "The Praise of flight" (1976). PMID:24227503

Fond, G

2013-01-01

258

Henry County and the Public Library: Report of a Self-Study by the Blue Ridge Regional Library.  

ERIC Educational Resources Information Center

An in-depth examination of Henry County and the Blue Ridge Regional Library in Virginia was conducted to assess the effectiveness, needs, and objectives of the library. Included are a brief history of Henry County, its physical, social, and economic characteristics and projections, and an evaluation of district census data. A detailed description…

Ragsdale, Betty M.; And Others

259

Conflict, Retrenchment, and Reappraisal: The Administration of Higher Education. The David D. Henry Lectures, 1972-78.  

ERIC Educational Resources Information Center

The first five David D. Henry lectures, and discussion and response to the first four, are presented in this book. Following a brief introduction by John E. Corbally and a biography of David Dobbs Henry, Clark Kerr's paper, "The Administration of Higher Education in an Era of Change and Conflict" (presented in October, 1972) focuses on change and…

1979

260

Comparison of the Dicke model and the Hamiltonian for n quantum dots  

NASA Astrophysics Data System (ADS)

CQED has been an active field of research for the last three decades, describing the intimacy of the interaction of radiation and matter in small volumes ?3, and have demonstrated that modifies not only the nature of this interaction, but also atomic characteristic that often were thought intrinsic, such as spontaneous emission or the very quantum nature of the interaction. These conditions have acquired quite an importance for the current activity on Quantum computation and Information. However, most of that activity has been developed in the conceptual and experimental framework of atomic systems. There is evidence that such features also occurs in Quantum Dots. We compare the Dicke and Jaynes Cummings dynamics of atoms described by the Hamiltonian of Quantum Dots, and develop the SU(2) perturbative approach in the regimen where the excitation number (atoms + photons) is larger than the number of atoms L. We exhibit the dynamical detuning produced by the Forster interaction.

Sanchez-Mondragon, Jose Javier; Alejo-Molina, Adalberto; Sanchez-Sanchez, Sergio; Torres-Cisneros, Miguel

2005-04-01

261

Kantowski-Sachs bulk viscous string cosmological model in Brans-Dicke theory of gravitation  

NASA Astrophysics Data System (ADS)

In this paper, we investigate spatially homogenous and anisotropic Kantowski-Sachs cosmological model in Brans-Dicke (Phys. Rev. 124:925, 1961) scalar-tensor theory of gravitation in the presence of bulk viscous fluid containing one dimensional cosmic strings. To find a determinate solution of the highly non-linear field equations we use the special law of variation for Hubble's parameter proposed by Berman (Nuovo Cimento B 74:182, 1983). We also use (i) the barotropic equation of state for the pressure and density. (ii) the trace free energy momentum tensor of the fluid and (iii) shear scalar is proportional to scalar expansion. Some physical and kinematical properties of the model obtained are, also, discussed.

Reddy, D. R. K.; Bharati, D.; Vijaya Lakshmi, G. V.

2014-05-01

262

Thermodynamics of charged rotating black branes in Brans-Dicke theory with quadratic scalar field potential  

SciTech Connect

We construct a class of charged rotating solutions in (n+1)-dimensional Maxwell-Brans-Dicke theory with flat horizon in the presence of a quadratic potential and investigate their properties. These solutions are neither asymptotically flat nor (anti)-de Sitter. We find that these solutions can present black brane, with inner and outer event horizons, an extreme black brane or a naked singularity provided the parameters of the solutions are chosen suitably. We compute the finite Euclidean action through the use of counterterm method, and obtain the conserved and thermodynamic quantities by using the relation between the action and free energy in grand-canonical ensemble. We find that these quantities satisfy the first law of thermodynamics, and the entropy does not follow the area law.

Dehghani, M. H. [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of); Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Pakravan, J.; Hendi, S. H. [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of)

2006-11-15

263

Stability of the Einstein static universe in the Jordan-Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

Emergent theory assumes that the universe originates from an Einstein static (ES) state rather than the big bang singularity, and, thus, provides a possible way to resolve the singularity problem. The stability against all kinds of perturbations that ensures the past eternity of the ES state is crucial for a successful realization of the emergent scenario. Recently, it has been found that in the context of the Jordan-Brans-Dicke (JBD) theory there exists a stable ES solution under homogenous and anisotropic perturbations. In this paper, we extend the analysis to the stability against tensor and inhomogeneous scalar perturbations. We find that, different from general relativity and f(R) theory, a stable ES solution is allowed in the JBD theory when different kinds of perturbations are considered, although the stability conditions are tighter for tensor and inhomogeneous scalar perturbations than those for homogenous and anisotropic ones.

Huang, He; Wu, Puxun; Yu, Hongwei

2014-05-01

264

Relativistic theory of gravity and a Brans-Dicke scalar field  

NASA Astrophysics Data System (ADS)

The natural generalization of the relativistic theory of gravity (RTG) by incorporating a Brans-Dicke scalar field is discussed. The equation for a scalar-tensor gravitational field in Minkowski space and the expression for the total energy-momentum metric tensor of a gravitational field and nongravitational matter is derived from the variational principle with a gravitational Lagrangian quadratic in the first derivatives of the scalar and tensor gravitational potentials. The two-parameter spherically symmetrical static solution for vacuum equations with a zero mass tensor graviton was obtained. This solution has a true singular Schwarzschild surface. In the case of a nonzero mass graviton, an approximate nonsingular solution for the beginning of the universe was obtained. It is noted that in the frame of the scalar-tensor generalization of RTG, a nonsingular homogeneous isotropic cosmology can be represented, not only by cyclic models, but also by models with an infinitely expanding universe and a simultaneously decreasing gravitational scalar.

Tuniak, V. N.

1996-02-01

265

A new understanding of the first electromagnetic machine: Joseph Henry's vibrating motor  

NASA Astrophysics Data System (ADS)

In 1831, Henry invented a battery-powered rocking-beam motor that he later described as the first electromagnetic machine. He repeatedly modified the design over his career, but only one version of a motor actually constructed by Henry is known to exist. This version is in a collection of Henry instruments at Princeton University. We found that the Princeton motor cannot have operated in the form that was displayed as early as 1884. We found evidence in several historical documents and in the instrument itself that the field magnet shown with the motor is a mistake. Instead of a single horizontal bar magnet, the motor was designed to use two elliptical magnets. We presume the error was made by whoever assembled the first public display. We modeled the dynamics of Henry's vibrating motor and compared our results to the operation of a replica motor. Modeling provides insight into how the motor is able to vibrate indefinitely even in the presence of energy loss due to friction.

Littman, Michael G.; Stern, Lucas E.

2011-02-01

266

Henry David Thoreau: American Transcendentalism and the Implications for Rhetoric in American Civic Education.  

ERIC Educational Resources Information Center

The American Philosopher Henry David Thoreau provides modern students an important perspective on the state and operation of democratic institutions and society. Many critics of his philosophy cite the author's inability to live up to his articulated tenets as grounds to dismiss the exhortative writings as idealistic and implausible. This essay…

Grapsy, Ronald P., Jr.

267

Henri Matisse: Color and Light. Teacher's Guide. School Arts: Looking/Learning.  

ERIC Educational Resources Information Center

Henri Matisse painted "Open Window, Collioure" in the summer of 1905, when he and Andre Derain worked together in Collioure (France), a small Mediterranean fishing port near the Spanish border. This teaching guide discusses the painting "Open Window, Collioure" and Matisse's use of light and vibrant color. The guide provides information on…

Brenner, Carla

268

Enter the Madcap Prince of Wales: Students Directing "Henry IV, Part I."  

ERIC Educational Resources Information Center

Argues that William Shakespeare's "Henry IV, Part I" is an appropriate and useful text for secondary English classrooms. Shows how the play lends itself to performance-based instruction. Outlines ways of accomplishing student engagement, using film versions, and assigning written work. (HB)

Earthman, Elise Ann

1993-01-01

269

Pre-Education Programs: A Comprehensive Project at Henry Ford Community College.  

ERIC Educational Resources Information Center

This document presents an overview of a four-year comprehensive pre-education project at Henry Ford Community College (HFCC) in Michigan. To meet the needs of school districts that preferred a 32-credit certificate program as well as districts that preferred a 60-unit associate degree, HFCC employed a career-ladder approach: A 32-credit…

Zopf, Deborah; Smyrski, Larry

270

33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.  

Code of Federal Regulations, 2011 CFR

33 Ç Navigation and Navigable Waters Ç 1 Ç 2013-07-01 Ç 2013-07-01 Ç false Ç Cape Henry, VA to Cape Hatteras, NC. Ç 80.515 Ç Section 80.515 Ç Navigation and Navigable Waters Ç COAST GUARD, DEPARTMENT OF HOMELAND SECURITY Ç INTERNATIONAL NAVIGATION RULES Ç COLREGS DEMARCATION LINES Ç Fifth...

2013-07-01

271

Pickering, Edward Charles (1846-1919) and Pickering, William Henry (1858-1938)  

NASA Astrophysics Data System (ADS)

Astronomers—two brothers. Born in Boston, MA, Edward became director of the Harvard College Observatory and observed the brightnesses of 45 000 stars. He hired a number of women, including WILLIAMINA P FLEMING, ANNIE J CANNON, Antonia Maury and HENRIETTA LEAVITT, and produced the Henry Draper Catalog, classifying the spectra of hundreds of thousands of stars. He and HERMANN CARL VOGEL independent...

Murdin, P.

2000-11-01

272

Ghosts, Crowds, and Spectacles: Visions of Venetian Travel in Henry James's Italian Hours  

Microsoft Academic Search

Reflecting upon a young American painter whom he sees at work copying the interior of St. Mark’s Cathedral, Henry James writes, in a tone that seems both wistful and rhapsodic: “The mere use of one’s eyes in Venice is happiness enough” (52). With these lines that begin the essay Venice: An Early Impression, James voices one of the more striking

Steven Salmoni

2005-01-01

273

Modeling Hydrodynamics, Temperature, and Water Quality in Henry Hagg Lake, Oregon, 2000-03.  

National Technical Information Service (NTIS)

The purpose of this study was to develop a model of Henry Hagg Lake that can (1) simulate the circulation, temperature, and water quality in the lake, (2) aid in developing a more in-depth understanding of lake circulation and quality and the processes af...

A. B. Sullivan S. A. Rounds

2004-01-01

274

76 FR 63906 - Henry Gordy International, Inc., Provisional Acceptance of a Settlement Agreement and Order  

Federal Register 2010, 2011, 2012, 2013

...March 9, 2006, death of an 8-year-old...subject to civil penalties for its knowing...subject to civil penalties for its knowing...serious injury or death, and Henry Gordy...any of the four deaths described in staff's...shall pay a civil penalty in the amount...

2011-10-14

275

Control-Structure Ratings on the Fox River at McHenry and Algonquin, Illinois  

USGS Publications Warehouse

The Illinois Department of Natural Resources-Office of Water Resources operates control structures on a reach of the Fox River in northeastern Illinois between McHenry and Algonquin. The structures maintain water levels in the river for flood-control and recreational purposes. This report documents flow ratings for hinged-crest gates, a broad-crested weir, sluice gates, and an ogee spillway on the control structures at McHenry and Algonquin. The ratings were determined by measuring headwater and tailwater stage along with streamflow at a wide range of flows at different gate openings. Standard control-structure rating techniques were used to rate each control structure. The control structures at McHenry consist of a 221-feet(ft)-long broad-crested weir, a 4-ft-wide fish ladder, a 50-ft-wide hinged-crest gate, five 13.75-ft-wide sluice gates, and a navigational lock. Sixty measurements were used to rate the McHenry structures. The control structures at Algonquin consist of a 242-ft-long ogee spillway and a 50-ft-wide hinged-crest gate. Forty-one measurements were used to rate the Algonquin control structures.

Straub, Timothy D.; Johnson, Gary P.; Hortness, Jon E.; Parker, Joseph R.

2009-01-01

276

Henry Evelyn Bliss--The Other Immortal, or a Prophet without Honour?  

ERIC Educational Resources Information Center

The paper takes a retrospective look at the work of Henry Evelyn Bliss, classificationist theorist and author of the "Bibliographic Classification". Major features of his writings and philosophy are examined and evaluated for the originality of their contribution to the corpus of knowledge in the discipline. Reactions to Bliss's work are analysed,…

Broughton, Vanda

2008-01-01

277

Mounting a Curricular Revolution: An Interview with Henry Louis Gates, Jr.  

ERIC Educational Resources Information Center

This article presents an interview with Henry Louis Gates, Jr., Harvard professor and cultural critic who has captured 25 million viewers with his PBS documentary series, African American Lives (WNET). Using genealogical research and DNA science, Gates traces the family history of 19 famous African Americans. What results is a rich and moving…

von Zastrow, Claus

2009-01-01

278

Henri Wallon's Theory of Early Child Development: The Role of Emotions  

Microsoft Academic Search

The present paper gives an account of part of the stage theory of early child development of the French theorist Henri Wallon (1879–1962). Unlike his contemporary Jean Piaget, Wallon concentrated his efforts upon a description of the child's emotional development and the role emotions play in establishing the bond between child and caregiver. The description of Wallon's stage theory is

René van der Veer

1996-01-01

279

Water Qualtiy of Nippersink Creek and Wonder Lake, McHenry County, Illinois, 1994-2001.  

National Technical Information Service (NTIS)

The report describes the water quality of Wonder Lake and Nippersink Creek, McHenry County, Illinois. Sediment and nutrient data were collected during 1994-97 and 1999-2001. The sediment trapping efficiency of Wonder Lake is estimated for the period 1994-...

D. H. Dupre D. M. Robertson

2004-01-01

280

James McHenry: Soldier-Statesmen of the Constitution. A Bicentennial Series, No. 4.  

ERIC Educational Resources Information Center

Less than five years after his first landing in the American colonies, James McHenry, a well-education Scots-Irish immigrant, was serving with the Continental Army outside Boston (Massachusetts), and his military experience led him into a lengthy career of public service where he forcefully and consistently upheld the ideal of a strong central…

Army Center of Military History, Washington, DC.

281

Henri Wallon's Theory of Early Child Development: The Role of Emotions.  

ERIC Educational Resources Information Center

Discusses the stage theory of early child development of French theorist Henri Wallon. Describes Wallon's efforts (in contrast to contemporary Piaget) to describe emotional development and the role emotions play in establishing the child-caregiver bond. Argues that Wallon's theory is unique in its focus, influenced theorists such as Vygotsky, and…

Van der Veer, Rene

1996-01-01

282

The Rhetoric of Bishop Henry McNeal Turner, Renowned Speaker and Journalist.  

ERIC Educational Resources Information Center

Bishop Henry McNeal Turner, a journalist and speaker, headed a back-to-Africa movement in the second half of the nineteenth century that was one of the first black rhetorical movements to meet the challenges of institutionalized racism in the United States. Turner was a preacher in the African Methodist Episcopal Church, becoming first an elder…

Cummings, Melbourne S.

283

The Henry Ford Academy: An Innovative Space for Teaching and Learning  

ERIC Educational Resources Information Center

Edith Graybill, English instructor at the Henry Ford Academy in Dearborn, Michigan, speaks about her school's English language arts curriculum, the influence of the school on the role of English language arts, the theories of teaching and learning used at the Academy, and other related topics. She believes that most of the students appreciate…

n/a, n/a

2005-01-01

284

Henry Black, rakugo and the coming of modernity in Meiji Japan  

Microsoft Academic Search

The Australian-born storyteller (rakugoka) Henry (Kairakutei) Black lived in Japan between 1865 and 1923. During those years, he affiliated with the San’y? school of storytelling, and performed kabuki roles, conjuring, and hypnotism. His achievements include the adaptation of the modern European detective and sensation fiction novel genres of Mary Braddon and Charles Dickens, as well as possibly Charles Reade and

Ian McArthur

2004-01-01

285

Prediction of octanol?water partition coefficients, Henry coefficients and water solubilities using UNIFAC  

Microsoft Academic Search

Octanol\\/water partition coefficients, Henry coefficients and water solubilities can serve as basic physicochemical parameters for estimating the effects to the environment which can arise from potentially hazardous substances. We discuss the application of the UNIFAC method, which allows the prediction of these values on the basis of molecular structure. The UNIFAC method has the advantage over other models that the

G. Wienke; J. Gmehling

1998-01-01

286

History: James McHenry, MD: Physician, Patriot, Politician and Poet  

Microsoft Academic Search

James McHenry emigrated from Ireland to the American colonies in 1771. He studied medicine with Dr. Benjamin Rush in Philadelphia and immediately volunteered as an Army surgeon when the Revolutionary War began. After serving in the medical department in Massachusetts, New York and at Valley Forge in Pennsylvania, he became an aide to General George Washington and subsequently an aide

Allen D. Spiegel; Florence Kavaler

2003-01-01

287

COASTAL CONDITIONS IN THE VIRGINIAN PROVINCE (CAPE COD TO CAPE HENRY)  

EPA Science Inventory

The U.S. EPA Environmental Monitoring and Assessment Program (EMAP) collected ecological condition data during 1990 through 1993 from the estuarine waters of the Virginian Biogeographic Province (Cape Henry to Cape Cod) to answer broad-scale questions on environmental conditions...

288

Fort McHenry National Monument and Historic Shrine. Teacher's Guide.  

ERIC Educational Resources Information Center

This teacher's guide explores Fort McHenry and the British attack on Baltimore Harbor (Maryland) in 1814. The guide contains 11 lessons: (1) "Where in the World Is Baltimore?" (no handout-use classroom resources); (2) "Why Baltimore?" (Handout-Why Baltimore?); (3) "Now Where Do We Place the Fort?" (Handout-Map of Patapsco River/Baltimore Harbor);…

Rogers, Jim

289

Effective Henry's Law constant measurements for glyoxal in model aerosols containing sulfate  

NASA Astrophysics Data System (ADS)

Traditional models represent secondary organic aerosol (SOA) formation based on the gas-phase oxidation of a limited set of precursor molecules. However, these models tend to under-estimate the amounts and degree of oxygenation of actual SOA, indicating missing processes. One such source that has become increasingly important in recent years is glyoxal (CHOCHO, the smallest alpha-dicarbonyl). Unlike traditional SOA precursors, glyoxal forms SOA by partitioning to the aqueous phase according to Henry's Law. This work presents an analysis of Henry's Law constants for glyoxal uptake to laboratory-generated aerosols in a dynamically coupled gas-aerosol system. We combine CU LED-CE-DOAS measurements of gas-phase glyoxal with online HR-Tof-AMS and time-resolved HPLC ESI MS/MS particle-phase measurements to characterize the time resolved evolution of glyoxal partitioning, and relate molecular-specific measurements to AMS mass spectra. The experiments were performed in the simulation chamber facility at PSI, Switzerland, and investigate ammonium sulfate (AS), and mixed AS / fulvic acid seed aerosols under relative humidity conditions ranging from 50 to 85% RH. The Henry's Law and effective Henry's Law constants are compared with other values reported in the literature.

Kampf, C.; Waxman, E.; Slowik, J.; Dommen, J.; Prevot, A.; Baltensperger, U.; Noziere, B.; Hoffmann, T.; Volkamer, R.

2012-04-01

290

Effective Henry's Law constant measurements for glyoxal in model aerosols containing sulfate  

NASA Astrophysics Data System (ADS)

Traditional models represent secondary organic aerosol (SOA) formation based on the gas-phase oxidation of a limited set of precursor molecules. However, these models tend to under-estimate the amounts and degree of oxygenation of actual SOA, indicating missing processes. One such source that has become increasingly important in recent years is glyoxal (CHOCHO, the smallest alpha-dicarbonyl). Unlike traditional SOA precursors, glyoxal forms SOA by partitioning to the aqueous phase according to Henry's Law. This work presents an analysis of Henry's Law constants for glyoxal uptake to laboratory-generated aerosols in a dynamically coupled gas-aerosol system. We combine CU LED-CE-DOAS measurements of gas-phase glyoxal with online HR-Tof-AMS and time-resolved HPLC ESI MS/MS particle-phase measurements to characterize the time resolved evolution of glyoxal partitioning, and relate molecular-specific measurements to AMS mass spectra. The experiments were performed in the simulation chamber facility at PSI, Switzerland, and investigate ammonium sulfate (AS), and mixed AS / fulvic acid seed aerosols under relative humidity conditions ranging from 50 to 85% RH. The Henry's Law and effective Henry's Law constants are compared with other values reported in the literature.

Kampf, C. J.; Waxman, E.; Slowik, J. G.; Dommen, J.; Prevot, A. S.; Noziere, B.; Hoffmann, T.; Volkamer, R.

2011-12-01

291

Seasonal variation in the development of chilling injury in ‘O’Henry’ peaches  

Microsoft Academic Search

Mealiness, a chilling injury symptom, is one of the most important quality limiting factors in peaches and nectarines exported from Chile. The development of mealiness was analyzed over 3 years to quantify the expression of this chilling injury (CI) symptom in different growth seasons. For such a purpose, ‘O’Henry’ peaches, considered a CI susceptible cultivar, were harvested and stored at

Reinaldo Campos-Vargas; Oscar Becerra; Ricardo Baeza-Yates; Verónica Cambiazo; Mauricio González; Lee Meisel; Ariel Orellana; Julio Retamales; Herman Silva; Bruno G. Defilippi

2006-01-01

292

Cosmic microwave background with Brans-Dicke gravity. II. Constraints with the WMAP and SDSS data  

SciTech Connect

Using the covariant formalism developed in a companion paper [F.-Q. Wu, L. E. Qiang, X. Wang, and X. Chen, preceding Article, Phys. Rev. D 82, 083002 (2010)] (paper I), we derive observational constraints on the Brans-Dicke model in a flat Friedmann-Lemaitre-Robertson-Walker universe with a cosmological constant and cold dark matter. The CMB observations we use include the Wilkinson Microwave Anisotropy Probe 5 yr data, the Arcminute Cosmology Bolometer Array Receiver 2007 data, the Cosmic Background Imager polarization data, and the Balloon Observations of Millimetric Extragalactic Radiation and Geophysics 2003 flight data. For the large scale structure we use the matter power spectrum data measured with the luminous red galaxy survey of the Sloan Digital Sky Survey Data Release 4. We parametrize the Brans-Dicke parameter {omega} with a new parameter {zeta}=ln(1/{omega}+1), and use the Markov-Chain Monte Carlo method to explore the parameter space. We find that using CMB data alone, one could place some constraints on positive {zeta} or {omega}, but negative {zeta} or {omega} could not be constrained effectively. However, with additional large scale structure data, one could break the degeneracy at {zeta}<0. The 2{sigma} (95.5%) bound on {zeta} is -0.008 37<{zeta}<0.010 18 (corresponding to {omega}<-120.0 or {omega}>97.8). We also obtained constraints on G/G, the rate of change of G at present, as -1.75x10{sup -12} yr{sup -1}

Wu Fengquan; Chen Xuelei [National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012 (China)

2010-10-15

293

Gravitational waves in Brans-Dicke theory: Analysis by test particles around a Kerr black hole  

NASA Astrophysics Data System (ADS)

Analyzing test particles falling into a Kerr black hole, we study gravitational waves in Brans-Dicke theory of gravity. First we consider a test particle plunging with a constant polar angle into a rotating black hole and calculate the waveform and emitted energy of both scalar and tensor modes of gravitational radiation. We find that the waveform as well as the energy of the scalar gravitational waves weakly depends on the rotation parameter of a black hole a and on the polar angle. Second, using a model of a nonspherical dust shell of test particles falling into a Kerr black hole, we study when the scalar modes dominate. When a black hole is rotating, the tensor modes do not vanish even for a ``spherically symmetric'' shell; instead a slightly oblate shell minimizes their energy but with a nonzero finite value, which depends on the Kerr parameter a. As a result, we find that the scalar modes dominate only for highly spherical collapse, but they never exceed the tensor modes unless the Brans-Dicke parameter ?BD<~750 for a/M=0.99 or unless ?BD<~20 000 for a/M=0.5, where M is the mass of a black hole. We conclude that the scalar gravitational waves with ?BD<~ several thousands do not dominate except for very limited situations (observation from the face-on direction of a test particle falling into a Schwarzschild black hole or highly spherical dust shell collapse into a Kerr black hole). Therefore, observation of polarization is also required when we determine the theory of gravity by the observation of gravitational waves.

Saijo, Motoyuki; Shinkai, Hisa-Aki; Maeda, Kei-Ichi

1997-07-01

294

Apigenin Reactivates Nrf2 Anti-oxidative Stress Signaling in Mouse Skin Epidermal JB6 P?+?Cells Through Epigenetics Modifications.  

PubMed

Nrf2 is a crucial transcription factor that controls a critical anti-oxidative stress defense system and is implicated in skin homeostasis. Apigenin (API), a potent cancer chemopreventive agent, protects against skin carcinogenesis and elicits multiple molecular signaling pathways. However, the potential epigenetic effect of API in skin cancer chemoprotection is not known. In this study, bisulfite genomic DNA sequencing and methylated DNA immunoprecipitation were utilized to investigate the demethylation effect of API at 15 CpG sites in the Nrf2 promoter in mouse skin epidermal JB6 P?+?cells. In addition, qPCR and Western blot analyses were performed to evaluate the mRNA and protein expression of Nrf2 and the Nrf2 ARE downstream gene, NQO1. Finally, the protein expression levels of DNA methyltransferases (DNMTs) and histone deacetylases (HDACs) were evaluated using API and the DNMT/HDAC inhibitor 5-aza/ trichostatin A. Our results showed that API effectively reversed the hypermethylated status of the 15 CpG sites in the Nrf2 promoter in a dose-dependent manner. API enhanced the nuclear translocation of Nrf2 and increased the mRNA and protein expression of Nrf2 and the Nrf2 downstream target gene, NQO1. Furthermore, API reduced the expression of the DNMT1, DNMT3a, and DNMT3b epigenetic proteins as well as the expression of some HDACs (1-8). Taken together, our results showed that API can restore the silenced status of Nrf2 in skin epidermal JB6 P?+?cells by CpG demethylation coupled with attenuated DNMT and HDAC activity. These results may provide new therapeutic insights into the prevention of skin cancer by dietary phytochemicals. PMID:24830944

Paredes-Gonzalez, Ximena; Fuentes, Francisco; Su, Zheng-Yuan; Kong, Ah-Ng Tony

2014-07-01

295

Stationary axially symmetric exterior solutions in the five-dimensional representation of the Brans-Dicke-Jordan theory of gravitation  

NASA Astrophysics Data System (ADS)

The inverse scattering method of Belinsky and Zakharov is used to investigate axially symmetric stationary vacuum soliton solutions in the five-dimensional representation of the Brans-Dicke-Jordan theory of gravitation, where the scalar field of the theory is an element of a five-dimensional metric. The resulting equations for the spacetime metric are similar to those of solitons in general relativity, while the scalar field generated is the product of a simple function of the coordinates and an already known scalar field solution. A family of solutions is considered that reduce, in the absence of rotation, to the five-dimensional form of a well-known Weyl-Levi Civita axially symmetric static vacuum solution. With a suitable choice of parameters, this static limit becomes equivalent to the spherically symmetric solution of the Brans-Dicke theory. An exact metric, in which the Kerr-scalar McIntosh solution is a special case, is given explicitly.

Bruckman, William

1986-11-01

296

Bianchi Type II, VIII & IX Cosmological Model with Magnetized Anisotropic Dark Energy in Brans-Dicke Theory of Gravitation  

NASA Astrophysics Data System (ADS)

In the present paper we studied Bianchi type II, VIII & IX space time in the presence of magnetized anisotropic dark energy in Brans-Dicke theory of gravitation. The exact solution of the field equations under the assumption on the anisotropy of the fluid are obtained for exponential and power law expansions. The obtained models approach isotropy asymptotically at large value of t. Some physical properties of the model are discussed.

Wankhade, K. S.; Sancheti, M. M.

2014-06-01

297

Taxing junk food: applying the logic of the Henry tax review to food.  

PubMed

The recent review of taxation in Australia - the Henry tax review - has recommended that the federal government increase the taxes already levied on tobacco and alcohol. Tobacco and alcohol taxes are put forward as the best way of reducing the social harms caused by the use and misuse of these substances. Junk foods have the same pattern of misuse and the same social costs as tobacco and alcohol. The Henry tax review rejects the idea of taxing fatty foods, and to date the government has not implemented a tax on junk food. We propose that a tax on junk food be implemented as a tool to reduce consumption and address the obesity epidemic. PMID:20955126

Bond, Molly E; Williams, Michael J; Crammond, Brad; Loff, Bebe

2010-10-18

298

"The Rockets' Red Glare": Francis Scott Key and the Bombardment of Fort McHenry  

NSDL National Science Digital Library

Back in 1814, Francis Scott Key set down a poem that began "O say can you see...." Later this work became the Star Spangled Banner, and it is arguably the best-known part of the War of 1812. This installment of the Teaching With Historic Places Lesson Plans takes a close look at the circumstances at Fort McHenry surrounding the composition of this well-known number. Visitors will find that there is an "About This Lesson" area which provides a nice bit of background on these materials. After reading along here, visitors can review the inquiry question for this exercise and then use primary accounts of the bombardment of Fort McHenry and other items, including maps and drawings. Educators will appreciate the "Putting it Together" area, which includes activities like "Debating the War of 1812" and "Whose 'Star Spangled Banner'?"

299

In wildness is the preservation of China: Henry Thoreau, Gao Xingjian, and Jiang Rong  

Microsoft Academic Search

Two widely read Chinese novels of the past 20 years—Gao Xingjian’s Soul Mountain (1990) and Jiang Rong’s Wolf Totem (2004)—echo Henry David Thoreau’s proclamation (in his essay “Walking”) that “in Wildness is the preservation of the world.”\\u000a These texts, which reveal their origins in journals, present highly personal quests for what remains of the wild in China;\\u000a turning their backs on

J. Gerard Dollar

2009-01-01

300

Human disturbance and trophic status changes in Crystal Lake, McHenry County, Illinois, USA  

Microsoft Academic Search

The paleolimnology (sediment chemistry, 210Pb dating, pollen, and diatoms) of Crystal Lake, McHenry County, Illinois, USA was studied to investigate the impact of European settlement on lake trophic status. Pollen clearly indicates a vegetational shift from Quercus dominance to Ambrosia. 210Pb dating suggests that the Ambrosia rise likely occurs around the 1840's, which is consistent with historical records on the

Yangdong Pan; Richard Brugam

1997-01-01

301

Documentation for the machine-readable version of the Henry Draper Catalogue (edition 1985)  

NASA Technical Reports Server (NTRS)

An updated, corrected and extended machine-readable version of the catalog is described. Published and unpublished errors discovered in the previous version was corrected; letters indicating supplemental stars in the BD have been moved to a new byte to distinguish them from double-star components; and the machine readable portion of The Henry Draper Extension (HDE) (HA 100) was converted to the same format as the main catalog, with additional data added as necessary.

Roman, N. G.; Warren, W. H., Jr.

1985-01-01

302

Uninsured in America: A NewsHour with Jim Lehrer / Henry J. Kaiser Family Foundation Partnership  

NSDL National Science Digital Library

On Tuesday May 16th, 2000, The NewsHour with Jim Lehrer and the Henry J. Kaiser Family Foundation released a nationwide report of "Americans' attitudes about the growing number of people without health insurance -- and about the problems faced by the uninsured." The NewsHour site features highlights of the report along with text, audio, and video portions of extended segments on the uninsured and interviews with key policymakers, politicians, and health care advocates.

2000-01-01

303

"Intersection syndrome" of the foot: treated by endoscopic release of master knot of Henry.  

PubMed

Intersection syndrome of the forearm is a painful condition in the area where the muscle bellies of the abductor pollicis longus and extensor pollicis brevis cross the common wrist extensors. A similar case of the foot with marked fibrosis at the interconnection of flexor hallucis longus and flexor digitorum tendons is reported and the fibrous interconnection was extended proximally. This was successfully treated with endoscopic release of the master knot of Henry. PMID:21290112

Lui, T H; Chow, Francis Y H

2011-05-01

304

Dicke-model quantum spin and photon glass in optical cavities: Nonequilibrium theory and experimental signatures  

NASA Astrophysics Data System (ADS)

In the context of ultracold atoms in multimode optical cavities, the appearance of a quantum-critical glass phase of atomic spins has been predicted recently. Due to the long-range nature of the cavity-mediated interactions, but also the presence of a driving laser and dissipative processes such as cavity photon loss, the quantum optical realization of glassy physics has no analog in condensed matter and could evolve into a “cavity glass microscope” for frustrated quantum systems out of equilibrium. Here we develop the nonequilibrium theory of the multimode Dicke model with quenched disorder and Markovian dissipation. Using a unified Keldysh path integral approach, we show that the defining features of a low-temperature glass, representing a critical phase of matter with algebraically decaying temporal correlation functions, are seen to be robust against the presence of dissipation due to cavity loss. The universality class, however, is modified due to the Markovian bath. The presence of strong disorder leads to an enhanced equilibration of atomic and photonic degrees of freedom, including the emergence of a common low-frequency effective temperature. The imprint of the atomic spin-glass physics onto the photon subsystem realizes a “photon glass” state and makes it possible to detect the glass state by standard experimental techniques of quantum optics. We provide an unambiguous characterization of the superradiant and glassy phases in terms of fluorescence spectroscopy, homodyne detection, and the temporal photon correlation function g(2)(?).

Buchhold, Michael; Strack, Philipp; Sachdev, Subir; Diehl, Sebastian

2013-06-01

305

Critical exponent of a quantum-noise-driven phase transition: The open-system Dicke model  

SciTech Connect

The quantum phase transition of the Dicke model has been observed recently in a system formed by motional excitations of a laser-driven Bose-Einstein condensate coupled to an optical cavity [Baumann et al., Nature (London) 464, 1301 (2010)]. The cavity-based system is intrinsically open: photons leak out of the cavity where they are detected. Even at zero temperature, the continuous weak measurement of the photon number leads to an irreversible dynamics toward a steady state. In the framework of a generalized Bogoliubov theory, we show that the steady state exhibits a dynamical quantum phase transition. We find that the critical point and the mean field are only slightly modified with respect to the phase transition in the ground state. However, the critical exponents of the singular quantum correlations are significantly different in the two cases. There is also a drastic modification of the atom-field entanglement, since the divergence of the logarithmic negativity of the ground state at the critical point is suppressed and a finite entanglement is found in the steady state.

Nagy, D.; Szirmai, G.; Domokos, P. [Research Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest (Hungary)

2011-10-15

306

Expanding (n+1)-dimensional wormhole solutions in Brans-Dicke cosmology  

SciTech Connect

We have obtained two classes of (n+1)-dimensional wormhole solutions using a traceless energy-momentum tensor in the Brans-Dicke theory of gravity. The first class contains wormhole solutions in an open geometry, while the second contains wormhole solutions in both open and closed universes. In addition to wormhole geometries, naked singularities and maximally symmetric space-time also appear among the solutions as special cases. We have also considered the traversability of the wormhole solutions and have shown that they are indeed traversable. Finally, we have discussed the energy-momentum tensor which supports this geometry and have checked for the energy conditions. We have found that wormhole solutions in the first class of solutions violate the weak energy condition (WEC). In the second class, the wormhole geometries in a closed universe do violate the WEC, but in an open universe with a suitable choice of constants the supporting matter energy-momentum tensor can satisfy the WEC. However, even in this case the full effective energy-momentum tensor including the scalar field and the matter energy-momentum tensor still violates the WEC.

Ebrahimi, E.; Riazi, N. [Physics Department and Biruni Observatory, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of)

2010-01-15

307

Reversible and irreversible spacetime thermodynamics for general Brans-Dicke theories  

SciTech Connect

We derive the equations of motion for Palatini F(R) gravity by applying an entropy balance law TdS={delta}Q+{delta}N to the local Rindler wedge that can be constructed at each point of spacetime. Unlike previous results for metric F(R), there is no bulk viscosity term in the irreversible flux {delta}N. Both theories are equivalent to particular cases of Brans-Dicke scalar-tensor gravity. We show that the thermodynamical approach can be used ab initio also for this class of gravitational theories and it is able to provide both the metric and scalar equations of motion. In this case, the presence of an additional scalar degree of freedom and the requirement for it to be dynamical naturally imply a separate contribution from the scalar field to the heat flux {delta}Q. Therefore, the gravitational flux previously associated to a bulk viscosity term in metric F(R) turns out to be actually part of the reversible thermodynamics. Hence we conjecture that only the shear viscosity associated with Hartle-Hawking dissipation should be associated with irreversible thermodynamics.

Chirco, Goffredo; Eling, Christopher; Liberati, Stefano [SISSA, Via Bonomea 265, 34136 Trieste (Italy); INFN Sezione di Trieste, Via Valerio 2, 34127 Trieste (Italy)

2011-01-15

308

Real-time observation of fluctuations at the driven-dissipative Dicke phase transition  

PubMed Central

We experimentally study the influence of dissipation on the driven Dicke quantum phase transition, realized by coupling external degrees of freedom of a Bose–Einstein condensate to the light field of a high-finesse optical cavity. The cavity provides a natural dissipation channel, which gives rise to vacuum-induced fluctuations and allows us to observe density fluctuations of the gas in real-time. We monitor the divergence of these fluctuations over two orders of magnitude while approaching the phase transition, and observe a behavior that deviates significantly from that expected for a closed system. A correlation analysis of the fluctuations reveals the diverging time scale of the atomic dynamics and allows us to extract a damping rate for the external degree of freedom of the atoms. We find good agreement with our theoretical model including dissipation via both the cavity field and the atomic field. Using a dissipation channel to nondestructively gain information about a quantum many-body system provides a unique path to study the physics of driven-dissipative systems.

Brennecke, Ferdinand; Mottl, Rafael; Baumann, Kristian; Landig, Renate; Donner, Tobias; Esslinger, Tilman

2013-01-01

309

Classical Bethe Ansatz and normal forms in an integrable version of the Dicke model  

NASA Astrophysics Data System (ADS)

The Dicke-Jaynes-Cummings-Gaudin model describes a collection of n spins coupled to a harmonic oscillator. It is known to be integrable, so one can define a moment map which associates to each point in phase space the list of values of the n+1 conserved Hamiltonians. We identify all the critical points of this map and we compute the corresponding quadratic normal forms, using the Lax matrix representation of the model. The normal coordinates are constructed by a procedure which appears as a classical version of the Bethe Ansatz used to solve the quantum model. We show that only elliptic or focus-focus singularities are present in this model, which provides an interesting example of a symplectic toric action with singularities. To explore these, we study in detail the degeneracies of the spectral curves for the n=1 and n=2 cases. This gives a complete picture for the image of the momentum map (IMM) and the associated bifurcation diagram. For n=2 we found in particular some lines of rank 1 which lie, for one part, on the boundary of the IMM, where they behave like an edge separating two faces, and which go, for another part, inside the IMM.

Babelon, O.; Douçot, B.

2012-12-01

310

Tungsten carbide-cobalt particles activate Nrf2 and its downstream target genes in JB6 cells possibly by ROS generation.  

PubMed

Hard metal consisting of a mixture of tungsten carbide (WC) and metallic cobalt (Co) was evaluated as a possible carcinogen in humans by IARC in 2003. Studies have suggested that nuclear factor erythroid 2-related factor 2 (Nrf2) constitutes one of the chemical-sensing and transcription systems that play an essential role(s) in chemical toxicity, carcinogenesis, and pathological processes. To elucidate the mechanisms of health hazards of WC-Co, effects of nano-WC-Co particles on Nrf2 signaling pathway were investigated in the present study in a JB6 cell line. After a 5 h treatment with nano-WC-Co particles, Nrf2 was released from Keap1 in the cytoplasm and translocated into the nucleus. Enzymatic activities of Nrf2 target genes, including glutathione S-transferase (GST) and NAD(P)H:quinone oxidoreductase 1 (NQO1), increased at 24 and 48 h after the treatment. Studies using reactive oxygen species (ROS) sensitive dyes indicated that ROS were produced in nano-WC-Co particle-treated cells. Pretreatment of the cells with catalase, but not sodium formate, resulted in a significant inhibitory effect on nano-WC-Co particle-induced Nrf2 target gene activation. These findings suggest that activation of Nrf2 and its downstream genes may be initiated by ROS generation, and ROS may act as a major contributor in nano-WC-Co particle-induced adverse health effects. PMID:20528745

Zhang, Xing-Dong; Zhao, Jinshun; Bowman, Linda; Shi, Xianglin; Castranova, Vincent; Ding, Min

2010-01-01

311

Apoptosis induced by tungsten carbide-cobalt nanoparticles in JB6 cells involves ROS generation through both extrinsic and intrinsic apoptosis pathways.  

PubMed

In this study, apoptosis and related signaling induced by WC-Co nanoparticles were investigated in JB6 cells and rat lung macrophages. Electron spin resonance (ESR) and fluorescent staining indicated that both WC-Co nanoparticles and fine particles stimulated reactive oxygen species (ROS) generation. Catalase exhibited an inhibitory effect on WC-Co nanoparticle-induced ROS as well as mitochondrial membrane permeability damage. Further study indicated that WC-Co nanoparticles elicited higher cytotoxicity and apoptotic induction than fine particles. Western blot analysis showed activation of proapoptotic factors including Fas, Fas-associated protein with death domain (FADD), caspase 3, 8 and 9, BID and BAX. In addition, both cytochrome c and apoptosis-inducing factor (AIF) were upregulated and released from mitochondria to the cytoplasm. Our findings demonstrate that, on a mass basis, WC-Co nanoparticles exhibit higher cytotoxicity and apoptotic induction than fine particles. Apoptosis induced by WC-Co nanoparticles and fine particles involves both extrinsic and intrinsic apoptosis pathways. PMID:23417053

Zhao, Jinshun; Bowman, Linda; Magaye, Ruth; Leonard, Stephen S; Castranova, Vincent; Ding, Min

2013-04-01

312

Withaferin A suppresses tumor promoter 12-O-tetradecanoylphorbol 13-acetate-induced decreases in isocitrate dehydrogenase 1 activity and mitochondrial function in skin epidermal JB6 cells.  

PubMed

Withaferin A (WA) is a bioactive compound derived from Withania somnifera. The antitumor activity of WA has been well studied in human cancer models; however, its chemopreventive potential is unclear. In the present study, we used the skin epidermal JB6 P+ cells, a well-established model for tumor promotion, and demonstrated that WA suppressed the tumor promoter 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced cell transformation and cell proliferation. Interestingly, TPA inactivated isocitrate dehydrogenase 1 (IDH1), which was reversed by WA. Similar results were also observed in mouse skin tissue. Therefore, we focused on metabolism as the potential mechanism of action. We found that mitochondrial functions were downregulated by TPA treatment, as indicated by reduced mitochondrial membrane potential, complex I activity and mitochondrial respiration. However, all of these downregulations were inhibited by WA. In addition, we examined the levels of ?-ketoglutarate, a product of IDH1, and WA blocked its reduction upon TPA treatment. Finally, we detected the lactate level as a glycolysis marker, and WA suppressed its elevation caused by tumor promoter treatment. Altogether, these results suggest that WA might exert its chemopreventive activity via inhibiting not only oncogenic activation, but also IDH1 inactivation and mitochondrial dysfunction in early tumorigenesis. PMID:23107437

Li, Wenjuan; Zhao, Yunfeng

2013-02-01

313

The general class of Bianchi cosmological models with viscous fluid and particle creation in Brans-Dicke theory  

NASA Astrophysics Data System (ADS)

This paper deals with the general class of Bianchi cosmological models with bulk viscosity and particle creation described by full causal thermodynamics in Brans-Dicke theory. We discuss three types of average scale-factor solutions for the general class of Bianchi cosmological models by using a special law for the deceleration parameter which is linear in time with a negative slope. The exact solutions to the corresponding field equations are obtained in quadrature form and solutions to the Einstein field equations are obtained for three different physically viable cosmologies. All the physical parameters are calculated and discussed in each model.

Chaubey, Raghavendra; Shukla, Anjani Kumar

2014-05-01

314

Computational analysis of cyclophane-based bisthiourea-catalyzed Henry reactions.  

PubMed

The Henry reaction between benzaldehyde and nitromethane catalyzed by a cyclophane-based bisthiourea has been studied with density functional theory [M06-2X-D3/def2-TZVPP/IEFPCM//TPSS-D2/6-31G(d)/IEFPCM]. The results of our study reveal that the transformation involves the reaction of a thiourea-nitronate complex with the uncoordinated aldehyde. On the basis of our calculations, the formation of the major stereoisomer is kinetically preferred. Employing smaller model systems, we show that the observed stereoselectivity arises primarily from differences in hydrogen bonding in diastereomeric transition states. PMID:24927014

Breugst, Martin; Houk, K N

2014-07-01

315

Henry Ingersoll Bowditch (1808-82): American physician, public health advocate and social reformer.  

PubMed

Henry Ingersoll Bowditch, a Bostonian physician from the mid-19th century, lived a passionate life full of commitment and devotion to various noble causes--he was a champion of public health, an advocate for inclusion of women in medicine and a staunch abolitionist, all unpopular social perspectives at that time in medical and political history. Seemingly difficult personality traits including his stubbornness and moralistic outlook were likely 'adaptive' as he confronted the political reality of major institutional change. His interest in statistical trends and environmental influences and his inductive reasoning led to a deeper understanding of consumption (tuberculosis), the widespread diagnostic use of the stethoscope and thoracocentesis. PMID:22319186

Butler, Paul M

2011-11-01

316

Inverse temperature dependence of Henry's law coefficients for volatile organic compounds in supercooled water.  

PubMed

Upon supercooling, water expels volatile organic compounds (VOC), and Henry's law coefficients are increasing concomitant with decreasing temperature. This unexpected observation was found by measuring the VOC partitioning between supercooled water and gas phase in the temperature range from -5 degrees C to -15 degrees C for benzene, toluene, ethlybenzene, m-, p-, o-xylenes (BTEX), methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE). Aqueous standard solutions were analyzed using a static headspace method in combination with gas chromatography/mass spectrometry (GC/MS). Dimensionless Henry's law coefficients (K(AW)) were calculated from measurements of the concentration of the VOCs in the headspace above the standard solutions at temperatures between -25 degrees C and 25 degrees C. The results show that the well known temperature dependence of Henry's law coefficients at temperatures above 0 degrees C is inversed upon decreasing the temperature below 0 degrees C and formation of supercooled water while decreasing the temperature to -15 degrees C. Upon further decrease of the temperature to -25 degrees C freezing of the supercooled water occurs. K(AW) values increase from 0.092 (benzene), 0.099 (toluene), 0.098 (ethylbenzene), 0.117 (m/p-xylene), 0.076 (o-xylene), 0.012 (MTBE) and 0.014 (ETBE at 5 degrees C to 0.298 (benzene), 0.498 (toluene), 0.944 (ethylbenzene), 0.327 (m/p-xylene), 0.342 (o-xylene), 0.029 (MTBE) and 0.041 (ETBE) at -25 degrees C, respectively. Inversion of Henry coefficients upon cooling the aqueous solutions to temperatures below 0 degrees C is explained by the increasing formation of ice-like clusters in the water below 0 degrees C. The VOC are expelled from these clusters resulting in enhanced VOC concentrations in the gas phase upon supercooling. Formation of ice upon further cooling to -25 degrees C results in a further increase of the VOC concentrations in the gas phase above the ice. The findings have implications for the partitioning of VOC in clouds between the gas phase, supercooled water droplets, aerosol particles and ice. PMID:19604535

Sieg, Karsten; Starokozhev, Elena; Schmidt, Martin U; Püttmann, Wilhelm

2009-09-01

317

Henry Sigerist and the history of medicine in Latin America: his correspondence with Juan R. Beltran.  

PubMed

During the years of World War II, the American Association for the History of Medicine fostered a Pan-American policy aimed at establishing relationships with Latin American historians of medicine. Juan R. Beltrán, professor of history of medicine at the University of Buenos Aires, also pursued an energetic program of academic diplomacy. The correspondence between Henry Sigerist and Beltrán makes manifest that by 1941 good channels of communication were established between Baltimore and Buenos Aires, but the friendly links did not last long. The motives for this can be found in the competing aims of the AAHM and Beltrán, and the pattern of international relationships during the war years. PMID:15764829

de Asúa, Miguel

2005-01-01

318

Surveyors of the West: William Henry Jackson and Robert Brewster Stanton  

NSDL National Science Digital Library

The New York Public Library has three major digital exhibitions currently running to complement their in-house exhibits. Together, these exhibits constitute a marvelous introduction to Western history via primary documents and images from the era. Surveyors of the West features diaries, photographs, stereographs, and field notes related to the work of William Henry Jackson, a government photographer influential in the establishment of US parks in the West, and Robert Brewster Stanton, a civil and mining engineer who surveyed the Grand Canyon between 1889 and 1890, and who was chief engineer for the Denver Colorado Canyon and Pacific Railroad.

2001-01-01

319

High-titer n-butanol production by clostridium acetobutylicum JB200 in fed-batch fermentation with intermittent gas stripping.  

PubMed

Acetone-butanol-ethanol (ABE) fermentation with a hyper-butanol producing Clostridium acetobutylicum JB200 was studied for its potential to produce a high titer of butanol that can be readily recovered with gas stripping. In batch fermentation without gas stripping, a final butanol concentration of 19.1?g/L was produced from 86.4?g/L glucose consumed in 78?h, and butanol productivity and yield were 0.24?g/L?h and 0.21?g/g, respectively. In contrast, when gas stripping was applied intermittently in fed-batch fermentation, 172?g/L ABE (113.3?g/L butanol, 49.2?g/L acetone, 9.7?g/L ethanol) were produced from 474.9?g/L glucose in six feeding cycles over 326?h. The overall productivity and yield were 0.53?g/L?h and 0.36?g/g for ABE and 0.35?g/L?h and 0.24?g/g for butanol, respectively. The higher productivity was attributed to the reduced butanol concentration in the fermentation broth by gas stripping that alleviated butanol inhibition, whereas the increased butanol yield could be attributed to the reduced acids accumulation as most acids produced in acidogenesis were reassimilated by cells for ABE production. The intermittent gas stripping produced a highly concentrated condensate containing 195.9?g/L ABE or 150.5?g/L butanol that far exceeded butanol solubility in water. After liquid-liquid demixing or phase separation, a final product containing ~610?g/L butanol, ~40?g/L acetone, ~10?g/L ethanol, and no acids was obtained. Compared to conventional ABE fermentation, the fed-batch fermentation with intermittent gas stripping has the potential to reduce at least 90% of energy consumption and water usage in n-butanol production from glucose. PMID:22627864

Xue, Chuang; Zhao, Jingbo; Lu, Congcong; Yang, Shang-Tian; Bai, Fengwu; Tang, I-Ching

2012-11-01

320

A model of investor sentiment 1 We are grateful to the NSF for financial support, and to Oliver Blanchard, Alon Brav, John Campbell (a referee), John Cochrane, Edward Glaeser, J.B. Heaton, Danny Kahneman, David Laibson, Owen Lamont, Drazen Prelec, Jay Ritter (a referee), Ken Singleton, Dick Thaler, an anonymous referee, and the editor, Bill Schwert, for comments. 1  

Microsoft Academic Search

Recent empirical research in finance has uncovered two families of pervasive regularities: underreaction of stock prices to news such as earnings announcements, and overreaction of stock prices to a series of good or bad news. In this paper, we present a parsimonious model of investor sentiment, or of how investors form beliefs, which is consistent with the empirical findings. The

Nicholas Barberis; Andrei Shleifer; Robert Vishny

1998-01-01

321

Preventing child obesity: a long-term evaluation of the HENRY approach.  

PubMed

Childhood obesity has reached epidemic levels, yet many health professionals lack confidence in working with parents around lifestyle change. HENRY (Health Exercise Nutrition for the Really Young) aims to tackle this through training practitioners to work more effectively with parents of preschoolers around obesity and lifestyle issues.We evaluated the long-term impact of HENRY training on health professionals' knowledge, skills and confidence in tackling obesity prevention. All practitioners trained 2007-11 (n = 1601) were invited to complete an online survey. 237 emails (14.8%) were undeliverable; 354 (26.0%) of the remainder completed the survey. A majority (67%) reported using knowledge and skills gained on a regular basis in their professional lives. Sessions on the importance of empathy and key parenting skills were considered particularly useful, with 78% and 74% respectively reporting regular use of these skills. Effects on respondents' personal lives were also reported: 61% applied the knowledge and skills at home, identifying for example, more shared family mealtimes and reduced portion sizes. The impact endures, with 71% of those undergoing training > 12 months ago, stating that they continued to use concepts in their professional lives. The findings suggest that brief training can have a sustained impact on practitioners' professional and personal lives. PMID:23914474

Brown, Rebecca E; Willis, Thomas A; Aspinall, Nichola; Candida, Hunt; George, Jackie; Rudolf, Mary C J

2013-07-01

322

Calculating henry adsorption constants of molecular hydrogen at 77 K on alumophosphate zeolites with different microchannel sizes  

NASA Astrophysics Data System (ADS)

Adsorption isotherms of molecular hydrogen are measured at 77 K in a series of AlPO alumophosphate zeolites with different microchannel sizes. The potential of the intermolecular interaction of H2 is calculated within the model of a cylindrical channel of variable size. Henry constants are calculated for this model for arbitrary orientations of the adsorbate molecules in microchannels. The experimental and calculated values of the Henry adsorption constant of H2 are compared at 77 K on AlPO zeolites. The constants of intermolecular interaction are determined for the H2-AlPO system.

Grenev, I. V.; Gavrilov, V. Yu.

2014-01-01

323

Data set for background investigation of atmospheric constituents for Cape Henry site: August 5-22, 1974  

NASA Technical Reports Server (NTRS)

The laboratory was located within the Fort Story Military Reservation at Cape Henry between 5 August and 21 August 1974. Total sulfur, total hydrocarbons, NO, NO2, Nox, and O3 were monitored and reported as hourly averages. Visibility was measured using an integrating nephelometer and reported as hourly averages. Twenty-four hour averaged mass loading was determined using two high volume air samplers located on different levels (25' and 50') at the site. Temperature, wind speed, relative humidity, barometric pressure and solar radiation intensity were measured at the site or supplemented by readings taken by the U. S. Coast Guard at the Cape Henry Light House.

1975-01-01

324

Implications of Two Well-Known Models for Instructional Designers in Distance Education: Dick-Carey versus Morrison-Ross-Kemp  

ERIC Educational Resources Information Center

This paper first summarizes, and then compares and contrasts two well-known instructional design models: Dick and Carey Model (DC) and Morrison, Ross and Kemp model (MRK). The target audiences of both models are basically instructional designers. Both models have applications for different instructional design settings. They both see the…

Akbulut, Yavuz

2007-01-01

325

The Politics of Knowledge and the Revitalization of American Democracy: A Response to Henry Giroux's "The University in Chains: Confronting the Military-Industrial-Academic Complex"  

ERIC Educational Resources Information Center

This article presents the author's response to Henry Giroux's "The University in Chains: Confronting the Military-Industrial-Academic Complex." Henry Giroux has written a provocative assessment of the contemporary challenges facing the United States as a society, which over the course of the 20th century had assumed the role of leader and exemplar…

Fraser, Cary

2009-01-01

326

Wechselwirkung von NO(sub 3)-Radikalen mit waessrigen Loesungen: Bestimmung des Henry- und des Massenakkommodationskoeffizienten. (Interaction of NO(sub 3) radicals with aqueous solutions: Estimation of the Henry coefficient and the mass accommodation coefficient).  

National Technical Information Service (NTIS)

The Henry coefficient of NO(sub 3) radicals, K(sub h)(NO(sub 3)), was studied in coiled denuder tubes of 2 mm diameter and variable length, e.g. 4-350 cm. The radicals were produced in a flow system by oxidation of NO with excess O(sub 3) at a temperature...

K. Thomas A. Volz-Thomas D. Kley

1993-01-01

327

Smog chamber experiments to investigate Henry's law constants of glyoxal using different seed aerosols  

NASA Astrophysics Data System (ADS)

Aerosols play an important role in the chemistry and physics of the atmosphere. Hence, they have a direct as well as an indirect impact on the earth's climate. Depending on their formation, one distinguishes between primary and secondary aerosols[1]. Important groups within the secondary aerosols are the secondary organic aerosols (SOAs). In order to improve predictions about these impacts on the earth's climate the existing models need to be optimized, because they still underestimate SOA formation[2]. Glyoxal, the smallest ?-dicarbonyl, not only acts as a tracer for SOA formation but also as a direct contributor to SOA. Because glyoxal has such a high vapour pressure, it was common knowledge that it does not take part in gas-particle partitioning and therefore has no impact on direct SOA formation. However, the Henry's law constant for glyoxal is surprisingly high. This has been explained by the hydration of the aldehyde groups, which means that a species with a lower vapour pressure is produced. Therefore the distribution of glyoxal between gas- and particle phase is atmospherically relevant and the direct contribution of glyoxal to SOA can no longer be neglected. A high salt concentration present in chamber seed aerosols leads to an enhanced glyoxal uptake into the particle. This effect is called "salting-in". The salting effect depends on the composition of the seed aerosol as well as the soluble compound. For very polar compounds, like glyoxal, a "salting-in" is observed[3]. Glyoxal particle formation during a smog chamber campaign at Paul-Scherrer-Institut (PSI) in Switzerland was examined using different seed aerosols such as ammonium sulfate, sodium chloride and sodium nitrate. The aim of this campaign was to investigate Henry's law constants for different seed aerosols. During the campaign filter samples were taken to investigate the amount of glyoxal in the particle phase. After filter extraction, the analyte was derivatized and measured using UHPLC-ESI-HR-MS. Additionally, gas-phase glyoxal has been analysed during the campaign. The results will be used to calculate the Henry's law constants. In this work, first results of the glyoxal study are presented. [1] J. Schnelle-Kreis, M. Sklorz, H. Herrmann, R. Zimmermann, Chem. Unserer Zeit, 2007, 41, 220-230 [2] M. M. Galloway, P. S. Chhabra, A. W. H. Chan, J. D. Surratt, R. C. Flagan, J. H. Seinfeld, F. N. Keutsch, Atmos. Chem. Phys, 9, 3331-3345, 2009 [3] C. J. Kampf, E. M. Waxman, J. G. Slowik, J. Dommen, L. Pfaffenberger, A. P. Praplan, A. S. H. Prévôt, U. Baltensperger, T. Hoffmann, R. Volkamer, Environ. Sci. Technol., 2013, 47, 4236-4244

Jakob, Ronit

2014-05-01

328

"Young People Are No Longer at Risk--They Are the Risk": Henry Giroux's "Youth in a Suspect Society"  

ERIC Educational Resources Information Center

This article analyzes Henry Giroux's recent book Youth in a Suspect Society: democracy or disposability? (Palgrave, 2009) and situates it within his post-9/11 critical interventions. Giroux has focused his recent work on theorizing, critiquing and challenging the confluence of militarization, corporatization and right-wing ideology that has…

McClennen, Sophia A.

2012-01-01

329

"Extraordinary Understandings" of Composition at the University of Chicago: Frederick Champion Ward, Kenneth Burke, and Henry W. Sams  

ERIC Educational Resources Information Center

While Richard Weaver, R. S. Crane, Richard McKeon, and Robert Streeter have been most identified with rhetoric at the University of Chicago and its institutional return in the 1950s, the archival record demonstrates that Frederick Champion Ward, dean of the undergraduate "College" from 1947 to 1954, and Henry W. Sams, director of English in the…

Beasley, James P.

2007-01-01

330

Teacher as Actor--Henry David Thoreau--From Room One-Eleven to Walden Pond and Beyond.  

ERIC Educational Resources Information Center

To help maintain class interest in the important themes addressed in "Walden" and "The Duties of Civil Disobedience," a high school English teacher has presented a dramatic monologue as Henry David Thoreau to his students. After much library research, the teacher used some of the props characteristic of the author, such as a walking stick and a…

Barto, David

331

Henry's law constants for paint solvents and their implications on volatile organic compound emissions from automotive painting  

SciTech Connect

This paper describes experimental results of equilibrium partitioning of several significant paint solvents and formaldehyde between air and water to quantify the potential for capturing and retaining the constituents in spraybooth scrubber water during automotive painting. The compounds studied are toluene, n-butanol, methyl ethyl ketone methyl propyl ketone, methyl isobutyl ketone, methyl amyl ketone, butyl cellosolve, butyl cellosolve acetate, butyl carbitol, and n-methyl-2-pyrrolidinone. A set of field data collected at a Ford Motor Company assembly plant was also analyzed to determine whether data were consistent with the equilibrium phenomenon. The primary findings include: (a) There were more than six orders of magnitude difference in the Henry's law constants among the solvents studied. A solvent with a smaller constant is less easily stripped from water. The Henry's law constants decrease in the following order: toluene and xylenes > methyl ethyl ketone > n-butanol > butyl cellosolve acetate > butyl cellosolve > formaldehyde > butyl carbitol > n-methyl-2-pyrrolidinone. (b) Field data showed accumulation of n-methyl-2-pyrrolidinone and stable concentrations of butyl carbitol, butyl cellosolve, and n-butanol in the paint-sludge pit water during a 2-month period. Stable concentrations indicate a continuous, balanced capture and stripping of the solvents. Data were consistent with measured Henry's law constants. (c) The low Henry's law constant for formaldehyde is the result of the fact that it is hydrated when dissolved in water.

Kim, B.R.; Kalis, E.M.; DeWulf, T.; Andrews, K.M.

2000-02-01

332

Organocatalytic asymmetric domino Michael-Henry reaction for the synthesis of substituted bicyclo[3.2.1]octan-2-ones.  

PubMed

The first organocatalytic asymmetric reaction between 1,4-cyclohexanedione and nitroalkenes has been studied, affording bicyclo[3.2.1]octane derivatives containing four continuous stereogenic centres. The products were obtained through a domino Michael-Henry process as a single diastereoisomer with excellent enantioselectivities. PMID:23392546

Tsakos, Michail; Elsegood, Mark R J; Kokotos, Christoforos G

2013-03-18

333

Constituting Antebellum African American Identity: Resistance, Violence, and Masculinity in Henry Highland Garnet's (1843) "Address to the Slaves"  

ERIC Educational Resources Information Center

In August 1843 Presbyterian minister Henry Highland Garnet delivered his "Address to the Slaves of the United States of America" to the National Convention of Colored Citizens in Buffalo, NY. While often read (and almost as often dismissed) as either an unqualified call for a violent slave rebellion or, at the least, a celebration of prior acts of…

Jasinski, James

2007-01-01

334

Plastic (wire-combed) grooving of a slip-formed concrete runway overlay at Patrick Henry Airport: An initial evaluation  

NASA Technical Reports Server (NTRS)

A wire-comb technique is described for transversely grooving the surface of a freshly laid (plastic state) slip-formed concrete overlay installed at Patrick Henry Airport. This method of surface texturing yields better water drainage and pavement skid resistance than that obtained with an older conventional burlap drag concrete surface treatment installed on an adjacent portion of the runway.

Marlin, E. C.; Horne, W. B.

1977-01-01

335

An Analysis of Some Aspects of Social Conflict at Henry Ford Community College (1963-1973). Research Summary #4.  

ERIC Educational Resources Information Center

This paper summarizes the findings of a ten-year longitudinal research study of attitude changes among faculty resulting, at least partially, from their collective bargaining experience. The study focused on Henry Ford Community College (Michigan), using the participant-observation approach. A number of techniques for gathering qualitative…

Howe, Ray A.

336

SENSORINEURAL HEARING PROCESSES AND DISORDERS, HENRY FORD HOSPTIAL INTERNATIONAL SYMPOSIUM (DETROIT, MICHIGAN, MARCH 25-27, 1965).  

ERIC Educational Resources Information Center

IN ORDER TO PROVIDE BOTH CLINICIAN AND INVESTIGATOR WITH A BETTER UNDERSTANDING OF THE PROBLEMS, CAUSES, IDENTIFICATION, AND HANDLING OF SENSORINEURAL HEARING LOSSES, THE HENRY FORD HOSPITAL INVITED INVESTIGATORS IN PSYCHOACOUSTICS, OTIOLOGY, OTONEUROLOGY, PHSIOLOGY, AND AUDIOLOGY TO SHARE THEIR RESEARCH AND CLINICAL FINDINGS. THE RESULTING 40…

GRAHMA, A. BRUCE, ED.

337

Plaintiffs' First Set of Interrogatories...Rosa Maria Rios, et al., Against Henry P. Read, et al., Defendants.  

ERIC Educational Resources Information Center

The plaintiffs in the case Rosa Maria Rios, et al., against Henry P. Read, et al., in the United States District Court for the Eastern District of New York, involving the Patchogue-Medford School District public schools, were presented with 200 questions, organized into twelve sections dealing respectively with general enrollment data,…

District Court, New York, NY. Eastern District of New York.

338

A Vision for the Future: Henry G. Bennett Memorial Library, Southeastern Oklahoma State University Strategic Plan, 2002-2007.  

ERIC Educational Resources Information Center

This document presents the five-year strategic plan developed by the library director, staff, and the Library Committee for the Henry G. Bennett Memorial Library, Southeastern Oklahoma State University. The goal of this plan is to provide a framework that the library can use to focus energy and resources in fulfilling the mission of the library…

Davis, Dorothy

339

Significance of the Henri-Michaelis-Menten theory in abiotic catalysis: catechol oxidation by ?-MnO 2  

NASA Astrophysics Data System (ADS)

The Henri-Michaelis-Menten theory, for more than eight decades, was only restricted to homogeneous enzymatic catalysis. A mimic of an enzymatic kinetics based on the Henri-Michaelis-Menten concept was experimentally observed in heterogeneous catalysis in the present study with ?-MnO 2 as an abiotic catalyst in the oxidation of catechol (1,2-dihydroxybenzene). Using the derived linear forms of Lineweaver-Burk or Hofstee, the data show that similar to the enzyme tyrosinase, the kinetics of the catechol oxidation catalyzed by ?-MnO 2 can be described by the Henri-Michaelis-Menten equation, V0= VmaxS/( Km+ S), where Vmax is the maximum velocity and Km the concentration of the substrate ( S) corresponding to an initial velocity ( V0) half of Vmax. By analogy to the enzymatic kinetics, the parameters Vmax and Km for an heterogeneous abiotic catalysis were derived for the first time. Further, based on the concentration of the active centers of the mineral oxide, the kinetic constants kcat and kcat/ Km, respectively, representing the turnover frequency and the efficiency of the mineral catalyst, were also determined from the derived general rate equation of Briggs and Haldane. As an abiotic catalyst, ?-MnO 2 has a paramount role in the oxidation of phenolic compounds in soil, sediment and water environments. Therefore, the present observation is of fundamental and practical significance in elucidating the affinity between an abiotic catalyst and a substrate based on the Henri-Michaelis-Menten theory.

Naidja, A.; Huang, P. M.

2002-05-01

340

Why Henry III of Navarre's Hair Probably did not Turn White Overnight.  

PubMed

Although a rare event, sudden whitening of hair (canities subita) has reportedly affected a number of well-known historical figures, usually in relation to dramatic events in their lives. Although early accounts are substantiated by more recent case reports in scientific literature, we suspect that the phenomenon is not only used as a literary means in fiction, with the aim of dramatizing, but probably also in historical accounts. For this purpose, we examine the case history of Henry III of Navarre who allegedly turned white on the evening of the Saint Bartholomew's day massacre, and challenge this claim, due to inconsistencies in his biography, with the current pathophysiological understanding of canities subita. PMID:21188015

Navarini, Alexander A; Trüeb, Ralph M

2010-01-01

341

The effect of dopants on phase equilibria: Implications for tests of Henry's Law behavior  

NASA Astrophysics Data System (ADS)

Our current understanding of trace element behavior is in great part dependent on the experimental database that defines the trace element constraints for geologically significant systems. The accuracy of that database is dependent on a number of factors, including analytical precision, kinetics, and the relevance of the experiments to the specific system of interest. One of the cross cutting issues in this field relates to the use of dopants (added components) in trace element experiments. In designing such experiments, we must balance the improved analytical precision gained by addition of elements of interest against the concern that those added components will affect the behavior of the system. One of the most important of those effects relates to the Henry's Law limit - a concentration level at which there is an inflection point in the activity-composition behavior. Many previous investigations have run experimental tests designed to define the Henry’s Law limit in different systems - with varying results (e.g. Drake and Weill, 1974; Drake and Holloway, 1981; Nielsen et al 1992; Bindeman and Davis, 2000, and others). In all cases, the primary metric (although often not the only) for defining the upper limit of concentration at which an element has “trace” behavior was an increase or decrease in the partition coefficient as a function of composition. In our current study we chose a different perspective, tracking the effect of specific dopants on the liquidus temperature, % crystallization and phase composition. We focused on two systems, one a primitive MORB (starting composition CT14 from the West Valley of the JdF), and H87-3 an ankaramite from Hawaii. Our results indicate that the magnitude of the effects of dopant addition are correlated to the partition coefficient of the dopant element. Addition of dopants with compatible behavior increase the liquidus temperature of the phase in which they are compatible (e.g. Sr and plagioclase), and suppress phases in which they are incompatible (Sr and olivine). This outcome is consistent with the predictions one would make on the basis of our general knowledge of thermodynamics. What is most notable is the magnitude of the effect, and the consequent effect on % crystallization and phase composition at a specific temperature. For example, in the MORB composition experiments, we focused on dopant concentrations less than 4000 ppm total (0.4 elemental wt %). At a fixed temperature, Mg# of the melt increased by 5%, coexisting An contents increased 4% and crystalinity dropped from 40 to less than 20% (olivine and plagioclase) between 100 and 4000ppm dopant. These specific changes in phase composition are consistent with a suppression of the partition coefficient for trace elements with network modifying behavior - but do not represent a Henry's Law limit. Our results provide an alternative explanation for the observation of a negative correlation of D with dopant concentration (e.g. Bindeman and Davis 2000), and must be taken into account in our future experimental designs.

Cunningham, J. L.; Nielsen, R. L.

2010-12-01

342

Anarchism and homosexuality in Wilhelmine Germany: Senna Hoy, Erich Mühsam, John Henry Mackay.  

PubMed

Homosexuality and its social and legal suppression were heatedly discussed in early twentieth-century Germany, including on the left. Among the anarchists, positions with markedly diverse forms of argument were espoused by such prominent advocates of individualist anarchism as John Henry Mackay and by others coming from the Bakuninist tradition, such as Senna Hoy and Erich Mühsam. Their writings evidence that prior to World War I and into the 1920s, German anarchists--especially when compared with the Social Democrats--intervened consistently on behalf of individual self-determination extending into the sexual sphere, even though an undercurrent of hostility toward homosexuals persisted within the leftist movement as a whole. PMID:8666752

Fähnders, W

1995-01-01

343

Omaha's Henry Doorly Zoo Academy: Where Science Education Comes to Life!  

NSDL National Science Digital Library

Omaha's Henry Doorly Zoo has become a leader in both informal and formal science education. Its Zoo Academy is one example of an effective nontraditional teaching model for science education. The academy has become an excellent work-based learning model and demonstrates how to collaborate and form partnerships successfully between school districts and the nonprofit/business world. From the Zoo Academy model, over 24 academy programs and five informal summer career camps have been developed and used with students in the Omaha Metropolitan area. This unique opportunity places students in a rich learning environment where they can make discoveries about the natural world and apply the knowledge gained to real-world situations.

Mulkerrin, Elizabeth A.

2008-01-01

344

THE BIOLOGIST AS PSYCHOLOGIST: HENRY FAIRFIELD OSBORN'S EARLY MENTAL ABILITY INVESTIGATIONS.  

PubMed

In the early 1880s, biologist Henry Fairfield Osborn conducted some of the first questionnaire research in American psychology. This article details how he came to distribute Francis Galton's questionnaire on mental imagery in the United States, as well as how he altered it to suit his own burgeoning psychological research interests. The development and circulation of questionnaires at the very beginning of American scientific psychology, first by Osborn and later by G. Stanley Hall, is discussed in terms of the new psychology's often-overlooked methodological plurality. Further, Osborn's late nineteenth century interest in individual variation and group differences in mental imagery ability are discussed in relation to his pervasive educational and social concerns, as well as his eventual status as a prominent eugenicist in the twentieth century United States. This research into mental imagery ability foreshadows the eugenic-oriented intelligence testing that developed in the early twentieth century. PMID:22589139

Young, Jacy L

2012-05-15

345

An improved approach for measuring Henry's law coefficients of atmospheric organics  

NASA Astrophysics Data System (ADS)

In this work, we present an improved method for Henry's law constant, KH, measurements by coupling a bubble column system with a gas cell/infrared spectrometer. To demonstrate the feasibility of this approach, we measured KH of atmospheric organics from three different classes, namely, toluene (hydrocarbon), sec-butylamine (amine), and cineole (ether). We also reported temperature and ionic strength effects on the KH values of sec-butylamine for the first time. As shown in this work, the method is highly capable of determining KH of atmospheric organic species regardless the presence of heteroatoms and the occurrence of hydration in water. It is very versatile, easy to use, reliable, and efficient. It is also well-suited for undergraduate students to conduct environmental chemical science research during academic semesters.

Kish, J. Duncan; Leng, Chunbo; Kelley, Judas; Hiltner, Joseph; Zhang, Yunhong; Liu, Yong

2013-11-01

346

A new approach to a century-old problem: Henri-Michaelis-Menten enzyme kinetics  

NASA Astrophysics Data System (ADS)

A new approach to Henri-Michaelis-Menten (HMM) enzyme kinetics is presented. In the first part, a simplified but useful description that stresses the cyclic nature of the catalytic process is summarized. In particular, the timedependence of the substrate concentration is obtained in a simple way that dispenses the quasi-steady-state approximation. In the second part an exact one-dimensional formulation of HMM kinetics is presented. The whole problem is condensed in a second-order non-linear autonomous differential equation, and the exact solution of HMM kinetics is given as a set of Maclaurin series. From the same evolution equation, a number of approximate solutions, some known, some new, can be derived in a systematic way. The evolution equation obtained is also well suited for the numerical computation of the concentrations of all species as a function of time for any given combination of parameters.

Berberan-Santos, Mário N.

2012-12-01

347

New Hypersonic Shock Tunnel at the Laboratory of Aerothermodynamics and Hypersonics Prof. Henry T. Nagamatsu  

SciTech Connect

The new 0.60-m. nozzle exit diameter hypersonic shock tunnel was designed to study advanced air-breathing propulsion system such as supersonic combustion and/or laser technologies. In addition, it may be used for hypersonic flow studies and investigations of the electromagnetic (laser) energy addition for flow control. This new hypersonic shock tunnel was designed and installed at the Laboratory for of Aerothermodynamics and Hypersonics Prof. Henry T. Nagamatsu, IEAv-CTA, Brazil. The design of the tunnel enables relatively long test times, 2-10 milliseconds, suitable for the experiments performed at the laboratory. Free stream Mach numbers ranging from 6 to 25 can be produced and stagnation pressures and temperatures up to 360 atm. and up to 9,000 K, respectively, can be generated. Shadowgraph and schlieren optical techniques will be used for flow visualization.

Toro, P. G. P.; Minucci, M. A. S.; Chanes, J. B. Jr; Oliveira, A. C.; Gomes, F. A. A.; Myrabo, L. N.; Nagamatsu, Henry T. [Laboratory of Aerothermodynamics and Hypersonics. Institute for Advanced Studies. IEAv-CTA. Rod. dos Tamoios km 5.5. Putim. Sao Jose dos Campos-SP 12228-001 (Brazil); Department of Mechanical, Aerospace, and Nuclear Engineering. Rensselaer Polytechnic Institute (RPI), Troy, NY, 12180-3590 (United States)

2008-04-28

348

The Henry J. Kaiser Family Foundation: Your Resource for Health Policy Information on the Internet  

NSDL National Science Digital Library

The Henry J. Kaiser Family Foundation is an independent philanthropic organization devoted to health care issues. The foundation publishes information on the following topics: health policy, reproductive health, HIV policy, entertainment media and public health, and health and development in South Africa. For each topic, the site provides an issues library that contains an annotated archive of full-text documents in .pdf and ASCII formats. In addition, the site manages a statistical database of State Medicaid and Uninsured Facts, posts summaries of recent surveys conducted by the foundation, organizes a modest links library, and maintains an electronic mailing list for reporters and the public -- mediaWire. Users may also register for a customized email notification service or register to receive, by email, the Daily Reproductive Health Report or the Daily HIV/AIDS Report.

349

Trifluoromethyl-modified dipeptides by ZrCl4-promoted aza-Henry reactions.  

PubMed

Chiral (R)-1-phenylethylamine was successfully employed in a tandem aza-Henry addition-reduction reaction to give chiral ?-nitro ?-trifluoromethyl amines. A subsequent coupling reaction with N-Boc-protected amino acids leads to obtain optically pure CF3-modified dipeptides carrying two different N-protecting groups. These peptidomimetic units are characterized by the presence of the [CH(CF3)NH] group as mimetic of the natural [CONH] peptidic bond and can be used for the synthesis of more complex CF3-modified peptides after selective deprotection of one of the two amine functions. 2D NMR spectral analyses were employed to determine the absolute configurations of all newly synthesized chiral compounds. PMID:24802246

Fioravanti, Stefania; Pelagalli, Alessia; Pellacani, Lucio; Sciubba, Fabio; Vergari, Maria Cecilia

2014-08-01

350

Water quality of Nippersink Creek and Wonder Lake, McHenry County, Illinois, 1994-2001  

USGS Publications Warehouse

Wonder Lake, McHenry County, Illinois was formed when an earthen dam was constructed across Nippersink Creek in 1929. The U.S. Geological Survey (USGS), in cooperation with the McHenry County Soil and Water Conservation District, operated two streamflow and water-quality monitoring sites (upstream and downstream of Wonder Lake) from July 1994 through June 1997, and examined the water quality of the lake during 1999-2000. From 1999 through 2001, the USGS National Water-Quality Assessment Program operated the same upstream monitoring station to assess the streamflow, sediments, nutrients, and other chemical and physical characteristics of Nippersink Creek. Interpolation and regression methods were used to compute loads of sediment and nutrients delivered to Wonder Lake through Nippersink Creek by the combination of data sets collected as part of these studies. Since the formation of Wonder Lake, sediment and nutrient loading from Nippersink Creek has caused lake water-quality degradation. Wonder Lake effectively trapped 75 percent of the 15,900 tons of suspended sediment delivered during 1994-97. The average daily sediment load delivered during 1994-2001 was 25 tons. High sediment loading from the watershed reduces water clarity and hinders lake navigation. Nutrient loading from Nippersink Creek results in eutrophic conditions within Wonder Lake as evaluated on a Trophic State Index. The load of total phosphorus trapped in Wonder Lake is from 6 to 28 percent of the delivered load from Nippersink Creek. If the lake could be restored to its original capacity, the sediment trapping efficiency may be increased.

Dupre, David H., Robertson, Dale M.

2004-01-01

351

Style and non-style in anatomical illustration: From Renaissance Humanism to Henry Gray  

PubMed Central

Style is a familiar category for the analysis of art. It is less so in the history of anatomical illustration. The great Renaissance and Baroque picture books of anatomy illustrated with stylish woodcuts and engravings, such as those by Charles Estienne, Andreas Vesalius and Govard Bidloo, showed figures in dramatic action in keeping with philosophical and theological ideas about human nature. Parallels can be found in paintings of the period, such as those by Titian, Michelangelo and Hans Baldung Grien. The anatomists also claimed to portray the body in an objective manner, and showed themselves as heroes of the discovery of human knowledge. Rembrandt’s painting of Dr Nicholas Tulp is the best-known image of the anatomist as hero. The British empirical tradition in the 18th century saw William Cheselden and William Hunter working with techniques of representation that were intended to guarantee detailed realism. The ambition to portray forms life-size led to massive volumes, such as those by Antonio Mascagni. John Bell, the Scottish anatomist, criticized the size and pretensions of the earlier books and argued for a plain style adapted to the needs of teaching and surgery. Henry Gray’s famous Anatomy of 1858, illustrated by Henry Vandyke Carter, aspired to a simple descriptive mode of functional representation that avoided stylishness, resulting in a style of its own. Successive editions of Gray progressively saw the replacement of Gray’s method and of all his illustrations. The 150th anniversary edition, edited by Susan Standring, radically re-thinks the role of Gray’s book within the teaching of medicine.

Kemp, Martin

2010-01-01

352

On the relationship between the classical Dicke-Jaynes-Cummings-Gaudin model and the nonlinear Schroedinger equation  

SciTech Connect

In this paper, the relationship between the classical Dicke-Jaynes-Cummings-Gaudin (DJCG) model and the nonlinear Schroedinger (NLS) equation is studied. It is shown that the classical DJCG model is equivalent to a stationary NLS equation. Moreover, the standard NLS equation can be solved by the classical DJCG model and a suitably chosen higher order flow. Further, it is also shown that classical DJCG model can be transformed into the classical Gaudin spin model in an external magnetic field through a deformation of Lax matrix. Finally, the separated variables are constructed on the common level sets of Casimir functions and the generalized action-angle coordinates are introduced via the Hamilton-Jacobi equation.

Du, Dianlou; Geng, Xue [Department of Mathematics, Zhengzhou University, Zhengzhou, Henan 450001 (China)] [Department of Mathematics, Zhengzhou University, Zhengzhou, Henan 450001 (China)

2013-05-15

353

Existence of naked singularities in the Brans-Dicke theory of gravitation. An analytical and numerical study  

NASA Astrophysics Data System (ADS)

Within the framework of the scalar-tensor models of gravitation and by relying on analytical and numerical techniques, we establish the existence of a class of spherically symmetric spacetimes containing a naked singularity. Our result relies on and extends a work by Christodoulou on the existence of naked singularities for the Einstein-scalar field equations. We establish that a key parameter in Christodoulou's construction couples to the Brans-Dicke field and becomes a dynamical variable, which enlarges and modifies the phase space of solutions. We recover analytically many properties first identified by Christodoulou, in particular the loss of regularity (especially at the center), and then investigate numerically the properties of these spacetimes.

Bedjaoui, Nabil; LeFloch, Philippe G.; Martín-García, José M.; Novak, Jérôme

2010-12-01

354

Solving the flatness and quasi-flatness problems in Brans-Dicke cosmologies with a varying light speed  

NASA Astrophysics Data System (ADS)

We define the flatness and quasi-flatness problems in cosmological models. We seek solutions to both problems in homogeneous and isotropic Brans-Dicke cosmologies with a varying speed of light. We formulate this theory and find perturbative, non-perturbative and asymptotic solutions using both numerical and analytical methods. For a particular range of variations of the speed of light the flatness problem can be solved. Under other conditions there exists a late-time attractor with a constant value of 0264-9381/16/4/030/img5 that is smaller than, but of the order of unity. Thus these theories may solve the quasi-flatness problem, a considerably more challenging problem than the flatness problem. We also discuss the related 0264-9381/16/4/030/img6 and quasi-0264-9381/16/4/030/img6 problem in these theories. We conclude with an appraisal of the difficulties these theories may face.

Barrow, John D.; Magueijo, João

1999-04-01

355

On the relationship between the classical Dicke-Jaynes-Cummings-Gaudin model and the nonlinear Schrödinger equation  

NASA Astrophysics Data System (ADS)

In this paper, the relationship between the classical Dicke-Jaynes-Cummings-Gaudin (DJCG) model and the nonlinear Schrödinger (NLS) equation is studied. It is shown that the classical DJCG model is equivalent to a stationary NLS equation. Moreover, the standard NLS equation can be solved by the classical DJCG model and a suitably chosen higher order flow. Further, it is also shown that classical DJCG model can be transformed into the classical Gaudin spin model in an external magnetic field through a deformation of Lax matrix. Finally, the separated variables are constructed on the common level sets of Casimir functions and the generalized action-angle coordinates are introduced via the Hamilton-Jacobi equation.

Du, Dianlou; Geng, Xue

2013-05-01

356

Discharge ratings for control structures at McHenry Dam on the Fox River, Illinois  

USGS Publications Warehouse

Twenty-three measurement of discharge were used to determine discharge ratings for the five adjustable sluice gates, spillway and fish ladder at McHenry Dam on the Fox River in Illinois. Discharge ratings were determined for free weir, free orifice, and submerged orifice flow regimes. Hydraulic conditions that identify flow regimes at McHenry Dam are defined by ratios between headwater depth (h1), tailwater depth (h3), and gate opening (hg). Flow under the sluice gates is identified as weir flow when the ratio of gate opening to headwater depth is greater than 0.73, and as orifice flow when hg/H1 is less than 0.73. Free orifice flow occurs when the ratio of tailwater depth to gate opening is less than 1.3, and submerged orifice flow occurs when h3/hg is greater than 1.3. Flow under the sluice gates is identified as free weir flow when the ratio of tailwater depth to headwater depth is less than 0.75, and as submerged weir flow when h3/h1 is greater than 0.75. Flow over the spillway is identified as free weir flow when the ratio of tailwater depth to headwater depth is less than 0.60, and as submerged weir flow when h3/h1 is greater than 0.60. Discharge coefficients to be used in equations to compute discharge for various hydraulic conditions were determined. Four discharge measurement, ranging from 169 to 2990 cu ft/sec, were used to define discharge coefficients that varies from 2.61 to 3.14 for free weir flow over the spillway. Nineteen discharge measurements, ranging from 180 to 4050 cu ft/sec, were used to define discharge coefficients for free weir, free orifice, and submerged orifice flow under the sluice gates. The average value of the discharge coefficient for free weir flow under the sluice gates is 3.17. Discharge coefficients for free orifice flow varied from 0.48 to 0.66 and the discharge coefficients for submerged orifice flow from the two measurements were 0.59 and 0.67. (Author 's abstract)

Fisk, G. G.

1988-01-01

357

FUNDAMENTAL AREAS OF PHENOMENOLOGY (INCLUDING APPLICATIONS): Dicke-Narrowing Spectroscopy of Doubly Dressed Electromagnetically Induced Transparency and Singly Dressed Four-Wave-Mixing in a Confined Atomic System  

NASA Astrophysics Data System (ADS)

Dicke-narrowing effect appears both in doubly dressed electromagnetically induced transparency and singly dressed four-wave-mixing lines due to the contribution of slow atoms resulting from de-excited effects of atom-wall collision and transient behaviour of atoms in a confined system. A robust recipe for high resolution spectroscopy of electromagnetically induced transparency dressed by two fields and four-wave-mixing lines comparable with the cold atoms is achievable in a thin vapour cell in experiments.

Li, Yuan-Yuan; Bai, Jin-Tao; Li-Li; Zhang, Wei-Feng; Li, Chang-Biao; Nie, Zhi-Qiang; Gan, Chen-Li; Zhang, Yan-Peng

2008-09-01

358

Seasonal Survival, Movement, and Habitat Use of Age0 Rainbow Trout in the Henrys Fork of the Snake River, Idaho  

Microsoft Academic Search

We quantified seasonal abundances, apparent survival rates, movements, and habitat use of age-0 rainbow trout Oncorhynchus mykiss in a 25-km reach of the Henrys Fork of the Snake River, Idaho, to determine what factors limit recruitment to the population. Natural production of rainbow trout occurred in each year of the study (1995-1997) and ranged from 158,000 to 306,000 age-0 fish

Matthew G. Mitro; Alexander V. Zale

2002-01-01

359

Noncovalent immobilization of ionic-tagged box-Cu(OAc)2 complex and its application in asymmetric Henry reaction.  

PubMed

Immobilized Cu(OAc)(2)-bis(oxazolines) via hydrogen bonding by SBA-15 was applied to asymmetric Henry reaction, and good enantioselectivities were obtained (up to 83% ee) between 2-methoxybenzaldehyde and CH(3)NO(2) in isopropyl alcohol (iPrOH). The catalyst could be reused seven times without any obvious loss in enantioselectivity. For the first time, this facile and clean immobilization method is applied to the use of bis(oxazolines) complexes. PMID:23001750

Li, Zhi-Huai; Zhou, Zhi-Ming; Hao, Xiao-Yan; Zhang, Jun; Dong, Xiao; Liu, Ying-Qiang

2012-12-01

360

Henry Cavendish (1731-1810): hydrogen, carbon dioxide, water, and weighing the world.  

PubMed

Henry Cavendish (1731-1810) was an outstanding chemist and physicist. Although he was not a major figure in the history of respiratory physiology he made important discoveries concerning hydrogen, carbon dioxide, atmospheric air, and water. Hydrogen had been prepared earlier by Boyle but its properties had not been recognized; Cavendish described these in detail, including the density of the gas. Carbon dioxide had also previously been studied by Black, but Cavendish clarified its properties and measured its density. He was the first person to accurately analyze atmospheric air and reported an oxygen concentration very close to the currently accepted value. When he removed all the oxygen and nitrogen from an air sample, he found that there was a residual portion of about 0.8% that he could not characterize. Later this was shown to be argon. He produced large amounts of water by burning hydrogen in oxygen and recognized that these were its only constituents. Cavendish also worked on electricity and heat. However, his main contribution outside chemistry was an audacious experiment to measure the density of the earth, which he referred to as "weighing the world." This involved determining the gravitational attraction between lead spheres in a specially constructed building. Although this was a simple experiment in principle, there were numerous complexities that he overcame with meticulous attention to experimental details. His result was very close to the modern accepted value. The Cavendish Experiment, as it is called, assures his place in the history of science. PMID:24793169

West, John B

2014-07-01

361

The pleasures and perils of prophetic advocacy: Henry E. Sigerist and the politics of medical reform.  

PubMed Central

Henry E. Sigerist, an internationally renowned medical historian, played a surprisingly important and visible role in American medical politics in the 1930s and 1940s. Born in Paris of Swiss parents, he was professor in Leipzig, Germany, before coming to the United States in 1932 as professor of the history of medicine at Johns Hopkins University. Once in America. Sigerist became deeply involved in medical politics and the campaign for national health insurance. He argued that individualized medical practice was outdated and should gradually be superseded by state-run and state-financed health services. National health insurance was but one step in this historical progression. Sigerist thus lent the weight of history itself to the cause of medical care reform. The charming and erudite Sigerist was welcomed by the leaders of academic medicine in America. Soon, he emerged as a spokesman of the left wing of the medical profession, an effective and popular speaker and an impassioned advocate of socialized medicine. This paper traces Sigerist's political ideas and activities, and his contributions toward medical care reform in the United States. Images p1639-a p1642-a

Fee, E

1996-01-01

362

Zinc metal-organic frameworks: efficient catalysts for the diastereoselective Henry reaction and transesterification.  

PubMed

Three new compounds bearing different flexible side functional groups, viz. 2-acetamidoterephthalic acid (H2L1), 2-propionamidoterephthalic acid (H2L2) and 2-benzamidoterephthalic acid (H2L3), were synthesized and their coordination reactions with zinc(II) were studied. X-ray crystallography showed the formation of novel metal organic frameworks with different dimensionalities, where the side functional groups of amidoterephthalic acid and/or auxiliary ligands were found to play significant roles. These frameworks [Zn2(L1)2(4,4'-bipyridine)2(H2O)(DMF)]n (1), [Zn4(L2)3(OH)2(DMF)2(H2O)2]n (2) and [Zn(L3)(H2O)2]n·n/2(1,4-dioxane) (3) act as heterogeneous polymeric solid catalysts not only for the diastereoselective nitroaldol (Henry) reaction of different aldehydes with nitroalkanes but also for transesterification reactions. These MOF-based heterogeneous catalysts can be recycled without losing their activity. PMID:24715037

Karmakar, Anirban; Guedes da Silva, M Fátima C; Pombeiro, Armando J L

2014-06-01

363

Genetic comparison of the head of Henri IV and the presumptive blood from Louis XVI (both Kings of France).  

PubMed

A mummified head was identified in 2010 as belonging to Henri IV, King of France. A putative blood sample from the King Louis XVI preserved into a pyrographically decorated gourd was analyzed in 2011. Both kings are in a direct male-line descent, separated by seven generations. We have retrieved the hypervariable region 1 of the mitochondrial DNA as well as a partial Y-chromosome profile from Henri IV. Five STR loci match the alleles found in Louis XVI, while another locus shows an allele that is just one mutation step apart. Taking into consideration that the partial Y-chromosome profile is extremely rare in modern human databases, we concluded that both males could be paternally related. The likelihood ratio of the two samples belonging to males separated by seven generations (as opposed to unrelated males) was estimated as 246.3, with a 95% confidence interval between 44.2 and 9729. Historically speaking, this forensic DNA data would confirm the identity of the previous Louis XVI sample, and give another positive argument for the authenticity of the head of Henri IV. PMID:23283403

Charlier, Philippe; Olalde, Iñigo; Solé, Neus; Ramírez, Oscar; Babelon, Jean-Pierre; Galland, Bruno; Calafell, Francesc; Lalueza-Fox, Carles

2013-03-10

364

Effect of Henry's law constant and operating parameters on vacuum-assisted headspace solid phase microextraction.  

PubMed

Nonequilibrium headspace solid-phase microextraction (HSSPME) sampling under vacuum conditions may dramatically improve extraction kinetics compared to regular HSSPME at room temperature. This paper investigates the effects of organic analyte properties and sampling parameters (headspace volume and sample agitation) on vacuum-assisted HSSPME (Vac-HSSPME). It was found that at room temperature, acceleration effects on extraction rates induced by reducing the total pressure of the sample container are important for those compounds where the Henry's law constant, K(H), is close or below the reported threshold values for low K(H) solutes. For these compounds evaporation rate is controlled by mass transfer resistance in the thin gas-film adjacent to the gas/sample interface and reducing the total pressure will increase evaporation rates and result in a faster overall extraction process. Conversely, for analytes with an intermediate K(H) value, Vac-HSSPME is not expected to improve extraction rates compared to regular HSSPME given that mass transfer resistance in the liquid-film becomes important. In accordance with the theory, at equilibrium, the amount of analyte extracted by the SPME fiber is not affected by the pressure conditions inside the sample container. Furthermore, Vac-HSSPME extraction kinetics for low K(H) analytes were marginally affected by the tested change in headspace volume as evaporation rates dramatically increase under reduced pressure conditions and the sample responds much faster to the concentration drops in the headspace when compared to regular HSSPME. At equilibrium however, increasing the headspace volume may result in a loss of sensitivity for Vac-HSSPME similar to that observed for regular HSSPME. As expected, stirring the liquid sample was found to improve Vac-HSSPME. Finally, the method yielded a linearity of 0.998 and detection limits in the ppt level. The precision varied between 1.8% and 8.4%. PMID:22621889

Psillakis, Elefteria; Mousouraki, Antonia; Yiantzi, Evangelia; Kalogerakis, Nicolas

2012-06-29

365

Flexure and faulting of sedimentary host rocks during growth of igneous domes, Henry Mountains, Utah  

USGS Publications Warehouse

A sequence of sedimentary rocks about 4 km thick was bent, stretched and uplifted during the growth of three igneous domes in the southern Henry Mountains. Mount Holmes, Mount Ellsworth and Mount Hillers are all about 12 km in diameter, but the amplitudes of their domes are about 1.2, 1.85 and 3.0 km, respectively. These mountains record successive stages in the inflation of near-surface diorite intrusions that are probably laccolithic in origin. The host rocks deformed along networks of outcrop-scale faults, or deformation bands, marked by crushed grains, consolidation of the porous sandstone and small displacements of sedimentary beds. Zones of deformation bands oriented parallel to the beds and formation contacts subdivided the overburden into thin mechanical layers that slipped over one another during doming. Measurements of outcrop-scale fault populations at the three mountains reveal a network of faults that strikes at high angles to sedimentary beds which themselves strike tangentially about the domes. These faults have normal and reverse components of slip that accommodated bending and stretching strains within the strata. An early stage of this deformation is displayed at Mount Holmes, where states of stress computed from three fault samples correlate with the theoretical distribution of stresses resulting from bending of thin, circular, elastic plates. Field observations and analysis of frictional driving stresses acting on horizontal planes above an opening-mode dislocation, as well as the paleostress analysis of faulting, indicate that bedding-plane slip and layer flexure were important components of the early deformation. As the amplitude of doming increased, radial and circumferential stretching of the strata and rotation of the older faults in the steepening limbs of the domes increased the complexity of the fault patterns. Steeply-dipping, map-scale faults with dip-slip displacements indicate a late-stage jostling of major blocks over the central magma chamber. Radial dikes pierced the dome and accommodated some of the circumferential stretching. ?? 1990.

Jackson, M. D.; Pollard, D. D.

1990-01-01

366

PSU J.B. Ayers G.W. Coomer Cal. Report Toyota/Prius motor design manufacturing assessment Oak Ridge National Laboratory July 2004 oral/TM-2004/137 - See more at: http://www.magneticsmagazine.com/main/articles/simulating-the-toyota-prius-electric-motor/#sthash.BPmEa6Mw.dpuf  

EPA Pesticide Factsheets

Did you mean: PSU J.B. Ayers G.W. Coomer Cal. Report Toyota/Prius motor design manufacturing assessment Oak Ridge National Laboratory July 2004 oral/TM-2004/137 - See more at: http://www.magneticsmagazine.com/main/articles/simulating-the-toyota-prius-electric-motor/#sthash.BPmEa6Mw.dpuf ?

367

Enantioselective synthesis of bicylco[3.2.1]octan-8-ones using a tandem Michael-Henry reaction.  

PubMed

Bicyclo[3.2.1]octan-8-ones have been prepared from a tandem Michael-Henry reaction between cyclohexane-1,2-diones and nitroalkenes using a quinine-derived thiourea as the catalyst. Although four stereogenic centers were created during the reaction, only two diastereomers were obtained in good diastereoselectivity and high enantioselectivity (92-99% ee). When 3-methylcyclohexane-1,2-dione (R(1) = Me) was used as the substrate, only the regioisomeric product of the corresponding thermodynamic enolate was obtained. PMID:20532185

Ding, Derong; Zhao, Cong-Gui; Guo, Qunsheng; Arman, Hadi

2010-06-19

368

Chiral lanthanum–lithium–binaphthol complex covalently bonded to silica and MCM-41 for enantioselective nitroaldol (Henry) reaction  

Microsoft Academic Search

A chiral BINOL ligand covalently anchored on silica and mesoporous MCM-41 was synthesized and characterized by powder XRD, FT-IR, N2 adsorption–desorption measurements, TGA and elemental analysis. These anchored ligands were then used to prepare La–Li–BINOL–silica 1a and La–Li–BINOL–MCM-41 1b complexes. The immobilized catalysts having lanthanum content around 0.12–0.18mmol\\/g were tested as enantioselective catalyst for Henry reaction and ee 55–84% were

Achyut P. Bhatt; Kavita Pathak; Raksh V. Jasra; Rukhsana I. Kureshy; Noor-ul H. Khan; Sayed H. R. Abdi

2006-01-01

369

Constraining emplacement geometry of large igneous dome growth: new evidence from Mt. Ellsworth, Henry Mountains, UT  

NASA Astrophysics Data System (ADS)

Surface displacements resulting from upper-crustal intrusions are a paramount concern for communities and facilities located near active volcanic areas (e.g. Campi Flegrei, Yucca Mtn.). Study of active intrusions is limited to remote observations through geophysical/geodetic methods. While surface displacements due to intrusions can be measured easily, intrusion shapes and depths are often based on simplified assumptions (e.g. spheres and ellipsoids). These models benefit from data constraining both the geometries of the individual intrusions, and the kinematics and mechanics of deformation within the overlying strata. Mount Ellsworth, a sub-volcanic intrusion within the Henry Mtns., is an ideal natural laboratory for the study of near surface intrusions because it was emplaced into relatively flat-lying stratigraphy ~24 Ma when the stress field was largely isotropic. Previous studies of Mt. Ellsworth (i.e. Hunt, 1953; Jackson and Pollard, 1988) present competing emplacement models (e.g. single vs. multiple batch construction) based on slightly different geologic maps. Through a combination of 1:5000 scale field mapping and profile-oriented gravity study, we have produced new detailed geologic maps and cross sections of Mt. Ellsworth. These were intended to be used to test emplacement models. However, the results suggest that the initial goals set out for this study could not be realized due to the lack of exposed intrusion, the relatively small dimensions of the exposed sills, and the largely uncapped nature of the mountain. Mapping results demonstrate, however, that some of the assumptions of the models theorized by previous researchers were inappropriately applied to Mt. Ellsworth. These assumptions include the thickness and separation of stratigraphic units, the size and distribution of sills and smaller intrusions, structural attitudes of beds and sills, and the presence of exposure of the main body of the intrusion. Based on balanced cross sections constructed using our mapping and assuming a floor within the Permian White Rim Sandstone, the Mt. Ellsworth intrusion can be constraint to be ~2 km thick with laccolithic geometry, elongate in the NE-SW extending ~8 km NE-SW and ~6 km in ESE-WNW.

Nushart, N.; Wetmore, P. H.

2013-12-01

370

The photodegradation of cadmium yellow paints in Henri Matisse's Le Bonheur de vivre (1905-1906)  

NASA Astrophysics Data System (ADS)

Evidence for the alteration of the yellow paints in Henri Matisse's Le Bonheur de vivre (1905-1906, The Barnes Foundation) has been observed since the 1990s. The changes in this iconic work of Matisse's Fauvist period include lightening, darkening, and flaking of the yellow paints. Handheld X-ray fluorescence (XRF) and multispectral imaging surveys reveal that the degradation is confined to cadmium yellow (CdS) paints. The discoloration of cadmium yellow paints in Impressionist, Post-Impressionist and early modernist work from the 1880s through the 1920s has been ascribed to the photo-oxidative degradation of CdS. Preliminary investigations of the degraded yellow paints in this work involved Cd LIII-edge X-ray Absorption Near Edge Spectroscopy (XANES) at the Stanford Synchrotron Radiation Light Source (SSRL Menlo Park, California) and Scanning Electron Microscopy-energy dispersive X-ray analysis (SEM-EDS) at the Winterthur Museum Scientific Research and Analysis Laboratory. To determine if the visual changes in the paints did in fact indicate photo-oxidative degradation and if different chemistries could be observed for the lightened versus darkened regions, synchrotron radiation-micro Fourier Transform InfraRed (SR-?FTIR) spectroscopy, X-ray Fluorescence (SR-?XRF) mapping and micro X-ray Absorption Near Edge Spectroscopy (?XANES) mapping at the Cd LIII-edge of the altered paint cross-sections were carried out at the European synchrotron radiation facility (ESRF, Grenoble, France) beamline ID-21. The goal is to elucidate the discoloration mechanisms observed in the paint using elemental and speciation mapping. The ?XANES mapping and SR-FTIR imaging showed a substantial enrichment of CdCO3 in the off-white surface crust of the faded/discolored CdS paint. This suggests that the CdCO3 is present as an insoluble photodegradation product rather than solely a paint filler or starting reagent. Additionally, oxalates and sulfates were found to be concentrated at the alteration surface.

Mass, Jennifer L.; Opila, Robert; Buckley, Barbara; Cotte, Marine; Church, Jonathan; Mehta, Apurva

2013-04-01

371

Experimentally feasible set of criteria detecting genuine multipartite entanglement in n-qubit Dicke states and in higher-dimensional systems  

NASA Astrophysics Data System (ADS)

We construct a set of criteria detecting genuine multipartite entanglement in arbitrary dimensional multipartite systems. These criteria are optimally suited for detecting multipartite entanglement in n-qubit Dicke states with m excitations, as shown in exemplary cases. Furthermore, they can be employed to detect multipartite entanglement in different states related to quantum cloning, decoherence-free communication, and quantum secret sharing. In a detailed analysis, we show that the criteria are also more robust to noise than any other criterion known so far, especially with increasing system size. Furthermore, it is shown that the number of required local observables scales only polynomially with size, thus making the criteria experimentally feasible.

Huber, Marcus; Erker, Paul; Schimpf, Hans; Gabriel, Andreas; Hiesmayr, Beatrix

2011-04-01

372

Theoretical analysis of the worthiness of Henry and Elder problems as benchmarks of density-dependent groundwater flow models  

NASA Astrophysics Data System (ADS)

Computer models must be tested to ensure that the mathematical statements and solution schemes accurately represent the physical processes of interest. Because the availability of benchmark problems for testing density-dependent groundwater models is limited, one should be careful in using these problems appropriately. Details of a Galerkin finite-element model for the simulation of density-dependent, variably saturated flow processes are presented here. The model is tested using the Henry salt-water intrusion problem and Elder salt convection problem. The quality of these benchmark problems is then evaluated by solving the problems in the standard density-coupled mode and in a new density-uncoupled mode. The differences between the solutions indicate that the Henry salt-water intrusion problem has limited usefulness in benchmarking density-dependent flow models because the internal flow dynamics are largely determined by the boundary forcing. Alternatively, the Elder salt-convection problem is more suited to the model testing process because the flow patterns are completely determined by the internal balance of pressure and gravity forces.

Simpson, M. J.; Clement, T. P.

373

Temperature dependence of the infinite dilution activity coefficient and Henry's law constant of polycyclic aromatic hydrocarbons in water.  

PubMed

The water solubility of 9,10-dihydroanthracene was experimentally determined between 278.12 and 313.17 K. Determinations were carried out by an experimental procedure developed in our laboratory, which is a modification of the dynamic coupled column liquid chromatographic technique. The uncertainty of the experimental determinations ranged from +/- 0.50% to +/- 3.10%. These data, as well as the water solubility data of other five polycyclic aromatic hydrocarbons (PAHs) previously studied, were used to calculate the temperature dependence of the infinite dilution activity coefficient of 9,10-dihydroanthracene, anthracene, pyrene, 9,10-dihydrophenanthrene, m-terphenyl, and guaiazulene in water. Molar excess enthalpies and entropies at infinite dilution, at 298.15 K, were also derived. The temperature dependence of the infinite dilution activity coefficients was used, together with literature values of the vapor pressures of supercooled liquid PAHs (p(B)(sc)), to estimate their Henry's law constants (HLC). Only HLC for anthracene, pyrene, and 9,10-dihydrophenanthrene were calculated, since no p(B)(sc) data were available in the literature for 9,10-dihydroanthracene, m-terphenyl, and guaiazulene. From the observed temperature dependence of the Henry's law constants the enthalpy and entropy of the phase change from the dissolved phase to the gas phase were also derived for anthracene, pyrene, and 9,10-dihydrophenanthrene. PMID:15212897

Reza, Joel; Trejo, Arturo

2004-08-01

374

A highly anti-selective asymmetric Henry reaction catalyzed by a chiral copper complex: applications to the syntheses of (+)-spisulosine and a pyrroloisoquinoline derivative.  

PubMed

A highly anti-selective asymmetric Henry reaction has been developed, affording synthetically versatile ?-nitroalcohols in a predominately anti-selective manner (mostly above 15:1) and excellent ee values (mostly above 95%). Moreover, the anti-selective Henry reaction was carried out in the presence of water for the first time with up to 99% ee. The catalytic mechanism was proposed based on the detection of the intermediates by extractive electrospray ionization mass spectrometry (EESI-MS). Furthermore, the anti adducts have been successfully transformed into the biochemically important (+)-spisulosine and a pyrroloisoquinoline derivative. PMID:22907874

Xu, Kun; Lai, Guoyin; Zha, Zhenggen; Pan, Susu; Chen, Huanwen; Wang, Zhiyong

2012-09-24

375

Using surface curvature to map geomorphic process regimes in a bedrock landscape, Henry Mountains, Utah  

NASA Astrophysics Data System (ADS)

Linkages between form and process are much better understood in soil-mantled landscapes than in bedrock landscapes, despite the wide occurrence of bedrock landscapes in arid and mountainous terrain. Soil-mantled hillslope topography can be characterized by hillslope gradient and its spatial derivative, which is commonly referred to as curvature and defined as the Laplacian of elevation. Surface curvature can also be quantified using techniques that are invariant to the orientation of the surface. These approaches are useful in many geoscience applications, including structural analysis of folded surfaces within deforming crustal blocks. Here we explore the use of surface curvature of bedrock topography as a metric to identify and map distinct geomorphic process regimes in a landscape devoid of soil cover. Our study site is Simpson Creek, a 2.5 km2 watershed on the east flank of Mt. Hillers in the Henry Mountains, Utah, which drains to the Colorado River in Glen Canyon. The land surface is entirely exposed Navajo Sandstone bedrock, with isolated patches of wind-blown sand deposits. The channel network is discontinuous, with alternating reaches of steep, deeply-incised, frequently-potholed slots, and lower-gradient, sand-bedded channels. Hillslope topography is characterized by dome-shaped and sub-linear ridges, and is influenced by prominent structural joints. We calculate two measures of the surface-normal curvature using an ALSM-derived digital elevation model. The mean and Gaussian surface curvatures are the average and product respectively of the magnitudes of the maximum and minimum curvature vectors, obtained by differentiating a polynomial fit at each point in a grid with 1 m spacing. Plots of mean versus Gaussian curvature reveal distinct clusters of landscape elements, which we associate with specific process regimes. In this parameter space, there are four quadrants, classified as dome, basin, synformal saddle and antiformal saddle. The channel and valley network corresponds to negative mean curvature, where concave and convex profile segments plot as basins and synformal saddles (positive and negative Gaussian curvature) respectively. We are able to use surface curvature to map what can be interpreted as bedrock channel width, as well as knickpoints, sand-bedrock bed transitions, and even individual large potholes. The tips of the channel network also have a distinct surface-curvature signature, and are associated with prominent polygonal bedrock fracturing at the sub-meter scale. In the hillslope portion of the landscape (positive mean curvature), the distribution of landscape elements has several modes, including a characteristic dome curvature that may be associated with sheet jointing and weathering-influenced exfoliation erosion, and an antiformal saddle curvature where solution pits occur, particularly on higher ridges most distant from the main-stem slot canyon channels. One key goal of this work is to quantify the effect of variable erosion rate on the distribution of process regime as expressed by these characteristic modes of bedrock surface curvature.

Corbett, S.; Sklar, L. S.; Davis, J.

2009-12-01

376

(2S,5R)-2-Methylaminomethyl-1-methyl-5-phenylpyrrolidine, a chiral diamine ligand for copper(ii)-catalysed Henry reactions with superb enantiocontrol.  

PubMed

A cis-2-aminomethyl-5-phenylpyrrolidine, which is easily available from methyl Boc-l-pyroglutamate, was found to be a highly efficient chiral ligand for Cu(ii)-catalysed Henry reactions. Excellent yields (>90%) and superb levels of enantiocontrol (98.5-99.6% ee) were reached with aromatic, heteroaromatic, vinylic, and aliphatic aldehydes (36 examples). PMID:24824405

Scharnagel, Dagmar; Prause, Felix; Kaldun, Johannes; Haase, Robert G; Breuning, Matthias

2014-05-27

377

Émergence et diffusion chez les entérobactéries du nouveau mécanisme de résistance plasmidique aux quinolones Qnr (résultats hôpital Henri-Mondor 2002–2005)  

Microsoft Academic Search

Aim of the study. – To assess the prevalence of the novel plasmid-mediated resistance to quinolones in enterobacteria isolated in our hospital.Materials and methods. – We have screened 737 enterobacterial strains isolated in Henri-Mondor hospital between 2002 and 2005 for the presence of the qnr gene by PCR using specific primers. Among them, 282 had a phenotype in concordance with

S. Honoré; C. Lascols; D. Malin; R. Targaouchi; V. Cattoir; P. Legrand; C.-J. Soussy; E. Cambau

2006-01-01

378

[The electric furnace of Henri Moissan at one hundred years: connection with the electric furnace, the solar furnace, the plasma furnace?].  

PubMed

The trace of Henri Moissan's pioneer work 100 years ago is clearly evidenced by an overview of achievements in high temperature devices; 1987: "Le four électrique" by Henri Moissan; 1948-1952: "High temperature heating in a cavity rotary kiln using focusing of solar radiation" by Félix Trombe; 1962: "The cavity rotary kiln using focused solar radiation jointly with a plasma gun" by Marc Foëx; 1970: "The rotary kiln with two plasma guns and arc transfer" by Marc Foëx; 1984: "The plasma furnace" by Electricité de France (EDF) at Renardières; 1997: "The plasma furnace" by the Atomic Energy Center (CEA) at Cadarache, the VULCANO program. The first part of this contribution is devoted to Henri Moissan. Re-reading his early book on the electric furnace, especially the first chapter and the sections on silica, carbon vapor and experiments performed in casting molten metal--the conclusions are outstanding--provides modern readers with an amazing insight into future developments. The last two parts are devoted to Félix Trombe and Marc Foëx, tracing the evolution of high temperature cavity processus leading to the solar furnace and the present day plasma furnace at the CEA. Focus is placed on research conducted by the French National Center for Scientific Research (CNRS) with the solar and plasma furnaces at Odeillo. The relationships with Henri Moissan's early work are amazing, offering a well deserved homage to this pioneer researcher. PMID:10365467

Royère, C

1999-03-01

379

Henry's law constants for ?-, ?-, and ?-hexachlorocyclohexanes (HCHs) as a function of temperature and revised estimates of gas exchange in Arctic regions  

Microsoft Academic Search

Henry's law constants (H, Pa m3 mol?1) were determined for ?-, ?-, and ?-HCH in deionized water over a temperature range of 5–35°C using bubble stripping (BS) and dynamic head space (DHS) techniques. The BS method was improved from previous work in the same laboratory by adjusting for loss of water from the stripping chamber over the experiment. This correction

Liz Sahsuvar; Paul A. Helm; Liisa M. Jantunen; Terry F. Bidleman

2003-01-01

380

Henry's Law constants or air to water partition coefficients for 1,3,5-triazines by an LFER method.  

PubMed

Solvation descriptors have been obtained for 19 substituted 1,3,5-triazines, using literature data on water to solvent partitions, and our own experimental determinations of water to solvent partition coefficients and micellar electrokinetic chromatography (MEKC) retention factors. The solvation descriptors can then be used to predict environmentally important air to water partition coefficients, K(w), which are the reciprocal of Henry's Law constants, with due regard to units. For this class of chemistry it is shown that the values of log K(w) so obtained are generally in good agreement with the experimental values compiled in this work and also compare well with the calculated values from the established bond contribution method of Meylan and Howard as implemented in the EPI Suite, but not with calculated values from the semi-empirical quantum chemical solvation models, SM2 and SM3, recently reported by Delgado and Alderete (J. Chem. Inf. Comput. Sci., 2003, 41, 1226-1230). PMID:17344948

Abraham, Michael H; Enomoto, Kei; Clarke, Eric D; Rosés, Martí; Ràfols, Clara; Fuguet, Elisabet

2007-03-01

381

Preliminary assessment report for Fort William Henry Harrison, Montana Army National Guard, Helena, Montana. Installation Restoration Program  

SciTech Connect

This report presents the results of the preliminary assessment (PA) conducted by Argonne National Laboratory at a Montana Army National Guard (MTARNG) property near Helena, Montana. Preliminary assessments of federal facilities are being conducted to compile the information necessary for completing preremedial activities and to provide a basis for establishing corrective actions in response to releases of hazardous substances. The principal objective of the PA is to characterize the site accurately and determine the need for further action by examining site activities, quantities of hazardous substances present, and potential pathways by which contamination could affect public health and the environment. This PA satisfies, for the Fort William Henry Harrison property, requirements of the Department of Defense Installation Restoration Program.

DuWaldt, J.; Meyer, T.

1993-07-01

382

Henry V. Ballard and Cordell, Corp. : Louisiana chooses a point in time in the market-value gas royalty controversy  

SciTech Connect

When parties base gas royalty payments on the ''market value'' of the gas, problems arise concerning where market value is to be determined, what market is to determine the market value, if there is a market for the gas at all, and, if so, whether market value should be determined before or after the lessee has processed the gas and made it marketable. A review of pertinent lawsuits concludes that lessors in future litigation should present evidence that they intended to protect themselves from royalty payments which did not reflect the current value of the gas. Lessees should urge the fairness of the result in the Henry decision and look for evidence to prove that their lessors were experienced and fully aware of the nature of the mineral exploration undertaking and the circumstances of the oil and gas industry. 71 references.

Kaiser, F.S.

1983-05-01

383

Dynamics in Dicke Model  

Microsoft Academic Search

We derive an exact differential operator equation for the operator level populations. Upon averaging over the initial state of the system and applying a mean-field approximation, we reduce the operator equation to an equation for c-numbers. Particular cases of one-and two-photon processes are considered for which the equations are integrated in quadratures and the solutions are the Weierstrasse elliptic functions.

E. P. Kadantseva; W. Chmielowski; A. S. Shumovsky

1989-01-01

384

Dick Crane's California Days  

NASA Astrophysics Data System (ADS)

Horace Richard Crane (1907-2007) was born and educated in California. His childhood was full of activities that helped him become an outstanding experimental physicist. As a graduate student at the California Institute of Technology (1930-1934), he had the good fortune to work with Charles C. Lauritsen (1892-1968) just as he introduced accelerator-based nuclear physics to Caltech. They shared the euphoric excitement of opening up a new field with simple, ingenious apparatus and experiments. This work prepared Crane for his career at the University of Michigan (1935-1973) where in the 1950s, after making the first measurement of the electron's magnetic moment, he devised the g-2 technique and made the first measurement of the anomaly in the electron's magnetic moment. A man of direct, almost laconic style, he made lasting contributions to the exposition of physics to the general public and to its teaching in high schools, community colleges, four-year colleges, and universities. I tell how he became a physicist and describe some of his early achievements.

Holbrow, Charles H.

2011-03-01

385

Femtosecond time resolved coherent anti-Stokes Raman spectroscopy of H2-N2 mixtures in the Dicke regime: Experiments and modeling of velocity effects  

NASA Astrophysics Data System (ADS)

In this paper, we present measurements and modeling of femtosecond time resolved coherent anti-Stokes Raman spectroscopy (CARS) signal in H2-N2 mixtures at low densities. Three approaches have been used to model the CARS response. The first is the usual sum of Voigt profiles. In the second approach, the speed dependent Voigt profile is used. In the last approach, a model of the temporal CARS signal is developed, which takes into account the velocity changes induced by collisions and the speed dependence of the collisional parameters. The velocity changes are modeled using the Keilson and Storer memory function; the radiator speed dependences of the collisional parameters are determined from their temperature dependences. The results obtained are consistent with previous studies in the frequency domain, showing that the changes of the velocity have important effects for the H2/N2 system in the Dicke narrowing density regime.

Tran, H.; Chaussard, F.; Le Cong, N.; Lavorel, B.; Faucher, O.; Joubert, P.

2009-11-01

386

Henry’s law constants and infinite dilution activity coefficients of cis-2-butene, dimethylether, chloroethane, and 1,1-difluoroethane in methanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isobutanol, tert-butanol, 1-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, and 2-methyl-2-butanol  

Microsoft Academic Search

Henry’s law constants and infinite dilution activity coefficients of cis-2-butene, dimethylether, chloroethane, and 1,1-difluoroethane in methanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isobutanol, tert-butanol, 1-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, and 2-methyl-2-butanol in the temperature range of 250K to 330K were measured by a gas stripping method and partial molar excess enthalpies were calculated from the activity coefficients. A rigorous formula for evaluating

Yoshimori Miyano; Takahiro Kobashi; Hiroshi Shinjo; Shinya Kumada; Yusuke Watanabe; Wataru Niya; Yoko Tateishi

2006-01-01

387

Real-world automotive emissions—Summary of studies in the Fort McHenry and Tuscarora mountain tunnels  

NASA Astrophysics Data System (ADS)

Motor vehicle emission rates of CO, NO, NO x, and gas-phase speciated nonmethane hydrocarbons (NMHC) and carbonyl compounds were measured in 1992 in the Fort McHenry Tunnel under Baltimore Harbor and in the Tuscarora Mountain Tunnel of the Pennsylvania Turnpike, for comparison with emission-model predictions and for calculation of the reactivity of vehicle emissions with respect to O 3 formation. Both tunnels represent a high-speed setting at relatively steady speed. The cars at both sites tended to be newer than elsewhere (median age was < 4 yr), and much better maintained as judged by low CO/CO2 ratios and other emissions characteristics. The Tuscarora Mountain Tunnel is flat, making it advantageous for testing automotive emission models, while in the underwater Fort McHenry Tunnel the impact of roadway grade can be evaluated. MOBILE4.1 and MOBILES gave predictions within ± 50% of observation most of the time. There was a tendency to overpredict, especially with MOBILES and especially at Tuscarora. However, light-duty-vehicle CO, NMHC, and NO x, all were underpredicted by MOBILE4.1 at Fort McHenry. Light-duty-vehicle CO/NOx ratios and NMHC/NO x, ratios were generally a little higher than predicted. The comparability of the predictions to the observations contrasts with a 1987 experiment in an urban tunnel (Van Nuys) where CO and HC, as well as CO/NOx, and NMHC/NO x, ratios, were grossly underpredicted. The effect of roadway grade on gram per mile (g mi -1) emissions was substantial. Fuel-specific emissions (g gal -1), however, were almost independent of roadway grade, which suggests a potential virtue in emissions models based on fuel-specific emissions rather than g mi -1) emissions. Some 200 NMHC and carbonyl emissions species were quantified as to their light- and heavy-duty-vehicle emission rates. The heavy-duty-vehicle NMHC emissions were calculated to possess more reactivity, per vehicle-mile, with respect to O 3 formation (g O 3 per vehicle-mile) than did the light-duty-vehicle NMHC emissions. Per gallon of fuel consumed, the light-duty vehicles had the greater reactivity. Much of the NMHC, and much of their reactivity with respect to O 3 formation, resided in compounds heavier than C 10, mostly from heavy-duty diesel, implying that atmospheric NMHC sampling with canisters alone is inadequate in at least some situations since canisters were found not to be quantitative beyond ˜ C 10 The contrasting lack of compounds heavier than C 10 from light-duty vehicles suggests a way to separate light- and heavy-duty-vehicle contributions in receptor modeling source apportionment. The division between light-duty-vehicle tailpipe and nontailpipe NMHC emissions was ˜ 85% tailpipe and ˜ 15% nontailpipe (evaporative running losses, etc.). Measured CO/CO 2 ratios agreed well with concurrent roadside infrared remote sensing measurements on light-duty vehicles, although remote sensing HC/CO2 ratio measurements were not successful at the low HC levels prevailing. Remote sensing measurements on heavy-duty diesels were obtained for the first time, and were roughly in agreement with the regular (bag sampling) tunnel measurements in both CO/CO2 and HC/CO2 ratios. A number of recommendations for further experiments, measurement methodology development, and emissions model development and evaluation are offered.

Pierson, William R.; Gertler, Alan W.; Robinson, Norman F.; Sagebiel, John C.; Zielinska, Barbara; Bishop, Gary A.; Stedman, Donald H.; Zweidinger, Roy B.; Ray, William D.

388

J.B. Nash Lecture Series.  

ERIC Educational Resources Information Center

The following lectures are presented in this publication: (1) "The Dynamics of Recreation" (Betty Van der Smissen); (2) "Recreation Prospects" (Edith L. Ball); (3) "A View of the Past--A Bridge to the Future" (Allen V. Sapora); (4) "Coming to Grips with the New Leisure" (Richard G. Kraus); (5) "The Mild Blue Yonder--Changing Lifestyles and…

Gray, Howard R., Comp.; And Others

389

Partition coefficients for REE between garnets and liquids - Implications of non-Henry's Law behaviour for models of basalt origin and evolution  

NASA Technical Reports Server (NTRS)

An experimental investigation of Ce, Sm and Tm rare earth element (REE) partition coefficients between coexisting garnets (both natural and synthetic) and hydrous liquids shows that Henry's Law may not be obeyed over a range of REE concentrations of geological relevance. Systematic differences between the three REE and the two garnet compositions may be explained in terms of the differences between REE ionic radii and those of the dodecahedral site into which they substitute, substantiating the Harrison and Wood (1980) model of altervalent substitution. Model calculations demonstrate that significant variation can occur in the rare earth contents of melts produced from a garnet lherzolite, if Henry's Law partition coefficients do not apply for the garnet phase.

Harrison, W. J.

1981-01-01

390

Do No Harm - Stories of Life, Death and Brain Surgery Marsh Henry Do No Harm - Stories of Life, Death and Brain Surgery 278pp £16.99 Orion 0297869876 978 0 2978 6987 0 [Formula: see text].  

PubMed

On paper, the idea is an obvious one. A prominent surgeon - Henry Marsh, senior consultant neurosurgeon at St George's Healthcare NHS Trust in London - is nearing retirement, so decides to write a book about his experiences. PMID:24866656

2014-05-28

391

Science, religion and the geography of speech at the British Association: William Henry Dallinger (1839-1909) under the microscope.  

PubMed

Since its inception in 1831, the discussion of political and religious topics had been excluded from the meetings of the British Association for the Advancement of Science (BAAS) - it was a 'neutral' body. This strategy was designed to both unite men of science with differing religious views, and prevent the Association from becoming embroiled in theological disputes. Although not always successful, the dedication to neutrality remained throughout the BAAS's history and was an important organising principle. This paper investigates how the separation of scientific and religious knowledge played out in practice by examining the speech of William Henry Dallinger, the prominent English microscopical researcher and Methodist preacher. In 1884 Dallinger travelled to Montreal, Canada, to part in the BAAS's fifty-fourth meeting. While in the city he delivered three addresses: a guest lecture to the Association, a presentation to a local theological College and a sermon at Montreal's largest Methodist church. To the Association Dallinger presented his science without any religious commitments, yet in these other venues, and away from the Association's strictures on speech, he presented science and religion as harmonious and inexorably tied. This paper argues that where Dallinger spoke made a difference to what he said, and underlines the value of thinking 'geographically' about encounters between science and religion. PMID:23415742

Toal, Ciaran

2013-06-01

392

[Tracing back for the basis. Research of Medieval medical manuscripts in Leipzig by Karl Sudhoff and Henry Ernest Sigerist].  

PubMed

At the beginning of the 20th century, two known medical historians, Karl Sudhoff and Henry Ernst Sigerist, were among the first persons, who took up thorough investigations of medical manuscripts in Leipzig. Above all, it was Mr. Sudhoff, who developed his own procedure, in order to exploit the unknown stocks. Apart from the only means available to him, the so-called Leyser-papers, written by the Leipzig librarian Hermann Leyser, at least once Sudhoff made a complete check-up of all manuscripts over the period of 22 years. On 315 sheets he took down various more or less extensive notes regarding these Codices, which are kept today as manuscript collection (Ms 01269) in the library of the university of Leipzig. Many publications were written on the basis of these readings. Sigerist was only looking through a small number of Leipzig manuscripts, as could be seen from his remarks written onto the users' cards. However, he could rely on Sudhoff's notes and look for specific manuscripts that he was interested in and review them. This was a first and very important step for the investigation of Leipzig medical manuscripts. PMID:20336928

Löffler, Anette

2009-01-01

393

[The first foci of dirofilariosis of dogs evoked by Dirofilaria repens Railliet et Henry, 1911 in central Poland].  

PubMed

Dirofilariosis is caused by nematodes Dirofilaria repens Railliet et Henry, 1911. This parasitosis is widely distributed in south Europe among dogs, cats and wild carnivorous. It occurs also in Asia and Africa. Adult nematodes D. repens locate in nodules, in subcutaneous or intramuscular connective tissue of dogs. The mosquitoes from genera Anopheles, Aedes and Culex are the intermediate hosts and vectors of mentioned parasites. The finding of 6 adult nematodes belonging to the species D. repens in scrotum under tunica vaginalis, during the castration of the dog, which has never been abroad, tended us to undertake presented studies. In August and September of 2009, 64 genuine dogs age from 1.5 to 12 years originated from 3 kennels in central Poland were examined. Dogs did not show any pathological symptoms of infection. Blood samples were examined for the presence of infection and a number of microfilariae. Species of microfilariae was determined after staining on the basis of morphological characters. In examined blood samples from dogs microfilariae belonging to the species Dirofilaria repens were found. Mean prevalence of infection in all examined kennels was 37.5% and mean intensity 32 microfilariae in 30 microl of blood. Microfilariae of D. immitis were not found in any examined blood samples. The results of presented studies show that native dirofilariosis of dogs caused by D. repens is common in central Poland. The result of our investigations lets us suppose, that the range of occurrence of D. repens will spread significantly towards north Europe. PMID:20209810

Demiaszkiewicz, Aleksander W; Pola?czyk, Grazyna; Pyziel, Anna M; Kuligowska, Izabela; Lachowicz, Jacek

2009-01-01

394

Pathobiology of Biliary Epithelia and Cholangiocarcinoma: Proceedings of the Henry M. and Lillian Stratton Basic Research Single-Topic Conference  

PubMed Central

In June 2008, the American Association for the Study of Liver Diseases (AASLD) sponsored the Henry M. and Lillian Stratton Basic Research Single-Topic Conference on the Pathobiology of Biliary Epithelia and Cholangiocarcinoma, which was held in Atlanta, GA. Attendees from 12 different countries participated in this conference, making it a truly international scientific event. Both oral and poster presentations were given by multidisciplinary experts, who highlighted important areas of current basic and translational research on biliary epithelial cell biology and pathophysiology, and on the etiology, cellular and molecular pathogenesis, and target-based therapy of cholangiocarcinoma. The specific goals and objectives of the conference were: (1) to advance knowledge of basic and molecular mechanisms underlying developmental and proliferative disorders of the biliary tract; (2) to foster a better and more comprehensive understanding of mechanisms regulating biliary epithelial (cholangiocyte) growth and transport, signaling, cell survival, and abnormalities that result in disease; and (3) to understand basic mechanisms of cholangiocarcinoma development and progression, with the added goal of identifying and exploiting potentially critical molecular pathways that may be targeted therapeutically. A number of interrelated themes emerged from the oral and poster sessions that affected current understandings of the complex organization of transcriptional and signaling mechanisms that regulate bile duct development, hepatic progenitor cell expansion, cholangiocyte secretory functions and proliferation, and mechanisms of cholangiocarcinogenesis and malignant cholangiocyte progression. Most notable were the critical questions raised as to how best to exploit aberrant signaling pathways associated with biliary disease as potential targets for therapy.

Sirica, Alphonse E.; Nathanson, Michael H.; Gores, Gregory J.; LaRusso, Nicholas F.

2013-01-01

395

Henry's law constant measurements for phenol, o-, m-, and p-cresol as a function of temperature  

NASA Astrophysics Data System (ADS)

In this work, a dynamic system based on the water/air equilibrium at the interface within the length of a microporous tube was used to experimentally determine the Henry's law constants (HLC) of phenol and cresols. The measurements were conducted over the range 278-298 K in both deionized water and 35gl-1 solution of NaCl. At 293 K and in pure water, HLC were found to be equal to (in units of Matm-1): phenol, HLC=(1005±270); o-cresol, HLC=(690±95); m-cresol, HLC=(1324±172); p-cresol, HLC=(1742±360). The obtained data were used to derive the following Arrhenius expressions: HLC=(4.1±0.6)×10-9exp((7684±874)/T), HLC=(1.5±0.1)×10-10exp((8544±512)/T), HLC=(5.5±0.4)×10-11exp((9028±508)/T) and HLC=(3.3±0.4)×10-11exp((9258±818)/T) for phenol, o-cresol, m-cresol and p-cresol, respectively. All of the values for HLC in 35gl-1 salt solution were 10-30% lower than their respective values in deionized water, depending on the compound and the temperature. These data were then used to estimate the fractions of phenol or of cresols in atmospheric aqueous phase. In order to evaluate the impact of a cloud on the atmospheric chemistry of phenol and cresols, we compare also their atmospheric lifetimes under clear sky (?gas), and cloudy conditions (?multiphase). The calculated multiphase lifetimes (in units of days) are significantly lower than those in gas phase at a cumulus temperature of 283 K (in parentheses): phenol, 0.26 (0.45); o-cresol, 0.17 (0.24); m-cresol, 0.13 (0.22); p-cresol, 0.11 (0.23).

Feigenbrugel, Valérie; Le Calvé, Stéphane; Mirabel, Philippe; Louis, Florent

396

Digital mapping of accommodating structures and deformation associated with the emplacement of high level magmatic intrusions, Henry Mountains, Utah  

NASA Astrophysics Data System (ADS)

High-level sill and laccolith complexes form an important part of volcanic plumbing systems in which magma is emplaced as a series of sub-horizontal tabular sheet-like intrusions. Few studies of these intrusion types have looked in detail at the host rock, emplacement-related deformation structures, and how the additional volume of rock is accommodated within the crust, i.e. the 'space problem'. The aim of this study is to develop an understanding of the stages of emplacement (style of emplacement versus style of host rock deformation) and the internal textural evolution of Tertiary sills and laccoliths in the Henry Mountains, whilst also attempting to resolve the 'space problem'. Conventional field mapping, outcrop studies and detailed data collection of deformation structures has been combined with digital mapping using FieldMove™ and terrestrial laser scanning (TLS) in order to enable 3D modelling of the intrusive bodies and emplacement-related host rock deformation. Kinematic and geometrical studies of emplacement-related structures in the host rocks are supplemented by micro-scale textural and geochemical studies of deformed host rocks, plagioclase feldspar and amphibole phenocryst populations within the intrusions, and the intrusion-host rock contact zone. Fabric studies recognise micro-structural fabrics (associated with accommodating structures) from magmatic fabrics (associated with magma flow). Crystal size distribution (CSD) studies help constrain the crystal:molten rock ratio and mechanical properties of the intruding magma, in addition to helping identify individual magma pulses. Fieldwork to date has focused on two satellite intrusions to Mt. Hilliers: Trachyte Mesa (the most distal intrusion; simple geometries); and Maiden Creek (closer to Mt. Hilliers; more complex geometries) both of which are emplaced into the Jurassic Entrada Formation sandstone. Preliminary results highlight the importance of faults, fractures, deformation bands and newly identified shear zones in accommodating the extra volume of magma at depth.

Wilson, P. I.; McCaffrey, K. J.; Holdsworth, R. E.; Davidson, J. P.; Murphy, P. J.; Jarvis, I.

2012-12-01

397

Coeur en sant? St-Henri--a heart health promotion programme in a low income, low education neighbourhood in Montreal, Canada: theoretical model and early field experience.  

PubMed Central

STUDY OBJECTIVE--Coeur en santé St-Henri is a five year, community based, multifactorial, heart health promotion programme in a low income, low education neighbourhood in Montreal, Canada. The objectives of this programme are to improve heart-healthy behaviours among adults of St-Henri. This paper describes the theoretical model underlying programme development as well as our early field experience implementing interventions. DESIGN--The design of the intervention programme is based on a behaviour change model adapted from social learning theory, the reasoned action model, and the precede-proceed model. The Ottawa charter for health promotion provided the framework for the development of specific interventions. Each intervention is submitted to formative, implementation, and impact evaluations using simple and inexpensive methods. PARTICIPANTS--The target population consists of adults living in St-Henri, a neighbourhood of 23,360 residents. Because of costs constraints, the intervention strategy targets women more specifically. The community is one of the poorest in Canada with 46% of the population living below the poverty line and 20% being very poor. The age-sex adjusted ischaemic heart disease mortality in 1985-87 was 317 per 100,000 compared with 126 per 100,000 in an affluent adjacent neighbourhood. RESULTS--Thirty nine distinct interventions have been developed and tested in the community, eight related to tobacco, 10 to diet, seven to physical activity, and 14 which are multifactorial. The interventions include smoking cessation and healthy recipes contests, a menu labelling and healthy food discount programme in restaurants, a point of choice nutrition education campaign, healthy eating and smoking cessation workshops, a walking club, educational material, print and electronic media campaigns, heart health fairs, and community events. CONCLUSION--An integrated heart health promotion programme is feasible in low income urban neighbourhoods but not all interventions are successful. Such a programme requires substantial energy and resources as well as long term commitment from public health departments.

Paradis, G; O'Loughlin, J; Elliott, M; Masson, P; Renaud, L; Sacks-Silver, G; Lampron, G

1995-01-01

398

Henry's law constants of 2,2,2-trifluoroethyl formate, ethyl trifluoroacetate, and non-fluorinated analogous esters  

NASA Astrophysics Data System (ADS)

Henry's law constants of two fluorinated esters [CF 3CH 2OC(O)H and C 2H 5OC(O)CF 3] and four related non-fluorinated esters [CH 3OC(O)H, C 2H 5OC(O)H, n-C 3H 7OC(O)H and C 2H 5OC(O)CH 3] were determined at 278-298 K by a column-stripping method. From the van't Hoff equation of H=Hexp[-{?H}/{R}({1}/{T}-{1}/{298})], the H298 (M atm -1) and ? Hsol (kJ mol -1) values obtained were 0.55±0.04, -39±3 (CF 3CH 2OC(O)H); 0.09±0.01, -41±5 (C 2H 5OC(O)CF 3); 4.2±0.2, -33±2 (CH 3OC(O)H); 3.4±0.2, -38±2 (C 2H 5OC(O)H); 2.6±0.1, -42±1 ( n-C 3H 7OC(O)H); and 6.0±0.5, -49±3 (C 2H 5OC(O)CH 3), respectively. Errors reported are at 95% confidence levels and represent precision only. Hydrolysis was observed only for C 2H 5OC(O)CF 3. Replacement of CH 3 by CF 3 decreases H298 values by 6, 11, and 67 times, respectively, for CF 3CH 2OC(O)H, CF 3CH 2OC(O)CH 3, and C 2H 5OC(O)CF 3, while the differences in the ? Hsol values were small with these substitutions. Sodium chloride salting-out effects are examined for all of the esters. C 2H 5OC(O)CF 3 has the largest salting coefficient (0.74). The estimated lifetime of CF 3CH 2OC(O)H suggests that dissolution into seawater serves as a tropospheric sink for this compound. On the basis of the solubility and reactivity of the esters studied herein, clouds and the ocean are discussed as possible sinks for the dissolution of tropospheric CF 3CF 2OC(O)H, which is an atmospheric oxidation product of a substitute for hydrofluorocarbons as CF 3CF 2OCH 3.

Kutsuna, Shuzo; Chen, Liang; Abe, Takashi; Mizukado, Junji; Uchimaru, Tadafumi; Tokuhashi, Kazuaki; Sekiya, Akira

399

Use of Selected Goodness-of-Fit Statistics to Assess the Accuracy of a Model of Henry Hagg Lake, Oregon  

NASA Astrophysics Data System (ADS)

Assessing a model's ability to reproduce field data is a critical step in the modeling process. For any model, some method of determining goodness-of-fit to measured data is needed to aid in calibration and to evaluate model performance. Visualizations and graphical comparisons of model output are an excellent way to begin that assessment. At some point, however, model performance must be quantified. Goodness-of-fit statistics, including the mean error (ME), mean absolute error (MAE), root mean square error, and coefficient of determination, typically are used to measure model accuracy. Statistical tools such as the sign test or Wilcoxon test can be used to test for model bias. The runs test can detect phase errors in simulated time series. Each statistic is useful, but each has its limitations. None provides a complete quantification of model accuracy. In this study, a suite of goodness-of-fit statistics was applied to a model of Henry Hagg Lake in northwest Oregon. Hagg Lake is a man-made reservoir on Scoggins Creek, a tributary to the Tualatin River. Located on the west side of the Portland metropolitan area, the Tualatin Basin is home to more than 450,000 people. Stored water in Hagg Lake helps to meet the agricultural and municipal water needs of that population. Future water demands have caused water managers to plan for a potential expansion of Hagg Lake, doubling its storage to roughly 115,000 acre-feet. A model of the lake was constructed to evaluate the lake's water quality and estimate how that quality might change after raising the dam. The laterally averaged, two-dimensional, U.S. Army Corps of Engineers model CE-QUAL-W2 was used to construct the Hagg Lake model. Calibrated for the years 2000 and 2001 and confirmed with data from 2002 and 2003, modeled parameters included water temperature, ammonia, nitrate, phosphorus, algae, zooplankton, and dissolved oxygen. Several goodness-of-fit statistics were used to quantify model accuracy and bias. Model performance was judged to be excellent for water temperature (annual ME: -0.22 to 0.05 ° C; annual MAE: 0.62 to 0.68 ° C) and dissolved oxygen (annual ME: -0.28 to 0.18 mg/L; annual MAE: 0.43 to 0.92 mg/L), showing that the model is sufficiently accurate for future water resources planning and management.

Rounds, S. A.; Sullivan, A. B.

2004-12-01

400

HENRY'S LAW CALCULATOR  

EPA Science Inventory

On-Site was developed to provide modelers and model reviewers with prepackaged tools ("calculators") for performing site assessment calculations. The philosophy behind OnSite is that the convenience of the prepackaged calculators helps provide consistency for simple calculations,...

401

William Henry Newell  

Cancer.gov

The Institute provides key faculty members from colleges and universities planning interdisciplinary liberal education courses with six months of feedback on draft syllabi, readings on interdisciplinarity, and a summer workshop providing training in interdisciplinary curriculum development and pedagogy, so they can create and teach their own interdisciplinary courses and then assist their colleagues in designing and teaching such courses.

402

Redescriptions of genera Raphidascaris Railliet et Henry, 1915 and Paranisakis Baylis, 1923 (Nematoda: Heterocheilidae), and Paracamallanus Yorke and Maplestone, 1926 (Nematoda: Camallanidae) from fish of Andhra Pradesh.  

PubMed

The present paper deals with the redescriptions of the species of a nematode of the families, Heterocheilidae Railliet et Henry, 1915 and Camallanidae Railliet et Henry, 1915 from the intestine and stomach of marine fishes, Epinephelus areolatus (Forskål), Tachysurus tenuispinis (Day), Johnius diacantus (Lecépède), Ilisha filigera (Valenciennes), Pomadasys maculatus (Blooch). Dasyatis (Himantura) uarnak (Forskål), Pterois russelli Bennett, Scoliodon sorrakowah (Cuvier) and Carangoides malabaricus Bloch and Schneider from Visakhapatnam and Kakinada (Andhra Pradesh). Most of the characters tally with Raphidascaris chirocentri Yamaguti, 1935, Paranisakis pastinacae (Rud., 1819) Baylis, 1936 and Paracamallanus theraponis Kalyankar, 1970, but differs from it body measurements, oesophagus length, location of the nerve ring, length of the tridents, possession of striations, shape and position of the vulvar process and size of the eggs. Except for these minor variations, in all other characters there is agreement with above species. Because of the non-availability of the male, it is not possible to assign the present specimens to any of the known species of the genus Raphidascaris, Paranisakis and Paracamallanus. Hence these are referred as Raphidascaris sp., Paranisakis sp. and Paracamallanus sp. Dasyatis uarnak, Pterois russelli, Scoliodon sorrakowah and Carangoides malabaricus are new host records. Visakhapatnam and Kakinada are the new locality records. PMID:2487509

Lakshmi, I R; Rao, K H; Shyamasundari, K

1989-01-01

403

Economic losses to recreational fisheries due to small-head hydro-power development: a case study of the Henry's Fork in Idaho  

SciTech Connect

The effect of small-head hydro-electric developments on a stream can range from reductions in fish population to elimination of recreational fishing on some portion of a stream. Using a survey of anglers, the Travel Cost and Contingent Value Methods were applied to calculate the economic losses in recreational cold water fishing that might result, if fishing quality dropped by 50% due to hydro-power development. A 50% reduction in fish catch on the Henry's Fork of the Snake River in eastern Idaho due to a dam would result in an annual loss of US $920,000 in fishing benefits. If, instead, a 50% reduction in size of fish caught occurs as a result of a dam on the Henry's Fork, the annual loss in fishing benefits would be US $1.07 million. Recommendations are made that the Federal Energy Regulatory Commission (FERC) should routinely require quantification of the fisheries benefits foregone in small-head hydro applications, and FERC should use such information to determine overall project feasibility before awarding a permit. 29 references.

Loomis, J.; Sorg, C.; Donnelly, D.

1986-01-01

404

A Laboratory Experiment To Measure Henry's Law Constants of Volatile Organic Compounds with a Bubble Column and a Gas Chromatography Flame Ionization Detector (GC-FID)  

ERIC Educational Resources Information Center

An undergraduate laboratory experiment is described to measure Henry's law constants of organic compounds using a bubble column and gas chromatography flame ionization detector (GC-FID). This experiment is designed for upper-division undergraduate laboratory courses and can be implemented in conjunction with physical chemistry, analytical…

Lee, Shan-Hu; Mukherjee, Souptik; Brewer, Brittany; Ryan, Raphael; Yu, Huan; Gangoda, Mahinda

2013-01-01

405

Investigation of Saltwater Intrusion and Recirculation of Seawater for Henry Constant Dispersion and Velocity-Dependent Dispersion Problems and Field-Scale Problem  

NASA Astrophysics Data System (ADS)

Three problems regarding saltwater intrusion, namely the Henry constant dispersion and velocity-dependent dispersion problems and a larger, field-scale velocity-dependent dispersion problem, have been investigated to determine quantitatively how saltwater intrusion and the recirculation of seawater at a coastal boundary are related to the freshwater inflow and the density-driven buoyancy flux. Based on dimensional analysis, saltwater intrusion and the recirculation of seawater are dependent functions of the independent ratio of freshwater advective flux relative to the density-driven vertical buoyancy flux, defined as az (or a for an isotropic aquifer), and the aspect ratio of horizontal and vertical dimensions of the cross-section. For the Henry constant dispersion problem, in which the aquifer is isotropic, saltwater intrusion and recirculation are related to an additional independent dimensionless parameter that is the ratio of the constant dispersion coefficient treated as a scalar quantity, the porosity, and the freshwater advective flux, defined as b. For the Henry velocity-dependent dispersion problem, the ratio b is zero, and saltwater intrusion and recirculation are related to an additional independent dimensionless parameter that is the ratio of the vertical and horizontal dispersivities, or r? = ?z/?x. For an anisotropic aquifer, saltwater intrusion and recirculation are also dependent on the ratio of vertical and horizontal hydraulic conductivities, or rK = Kz/Kx. For the field-scale velocity-dependent dispersion problem, saltwater intrusion and recirculation are dependent on the same independent ratios as the Henry velocity-dependent dispersion problem. In the two-dimensional cross-section for all three problems, freshwater inflow occurs at an upgradient boundary, and recirculated seawater outflow occurs at a downgradient coastal boundary. The upgradient boundary is a specified-flux boundary with zero freshwater concentration, and the downgradient boundary is a specified-head boundary with a specified concentration equal to seawater. Equivalent freshwater heads are specified at the downstream boundary to account for density differences between freshwater and saltwater at the downstream boundary. The three problems were solved using the numerical groundwater flow and transport code SEAWAT for two conditions, i.e., first for the uncoupled condition in which the fluid density is constant and thus the flow and transport equations are uncoupled in a constant-density flowfield, and then for the coupled condition in which the fluid density is a function of the total dissolved solids concentration and thus the flow and transport equations are coupled in a variable-density flowfield. A wide range of results for the landward extent of saltwater intrusion and the amount of recirculation of seawater at the coastal boundary was obtained by varying the independent dimensionless ratio az (or a in problem one) in all three problems. The dimensionless dispersion ratio b was also varied in problem one, and the dispersivity ratio r? and the hydraulic conductivity ratio rK were also varied in problems two and three.

Motz, L. H.; Kalakan, C.

2013-12-01

406

Optimizing acid-base bifunctional mesoporous catalysts for the henry reaction: effects of the surface density and site isolation of functional groups.  

PubMed

We report on the effects of the surface density and the spacing between grafted organoamines (and residual ungrafted silanols) of amine-functionalized mesoporous materials on their (cooperative) catalytic activity in the Henry reaction. The spacing between the bifunctional groups (amines and silanols), their site isolation, and their surface density were controlled by one-step or two-step grafting of a series of organosilanes containing linear alkylamine, alkyldiamine, alkyltriamine, and meta- and para-substituted aromatic amines onto mesoporous silica in ethanol and/or toluene. The grafting in ethanol produced site-isolated, flexible alkylamines, alkyldiamines, and alkyltriamines of different tether lengths and rigid meta- and para-substituted aromatic amines and high surface area materials, whereas the grafting in toluene resulted in closely spaced organoamines and materials with lower surface areas. The spacing between the organoamine groups was probed by complexing cupric ions with the amines and by measuring the electronic spectra of the complexes. The materials' catalytic activities were dependent not only on the degree of site isolation of the amine groups and the surface areas of the materials, but also on the relative spacing between the functional groups and their surface density. Samples grafted with monoamine groups in ethanol and samples grafted with diamine or triamine groups in toluene for 5 h gave approximately 100% conversion in 16 min of the Henry reaction between p-hydroxybenzaldehyde and nitromethane. However, the corresponding monoamine-grafted sample in toluene and diamine- and triamine-grafted samples in ethanol gave approximately 100% conversion after 1 h. On the basis of turnover number (TON) and TON per surface area, the samples containing optimum concentrations of approximately 0.8 - 1.5 mmol of grafted organoamines/g, which we dubbed as the critical density of organic grafted groups, gave the highest catalytic efficiencies. These samples have the most favorable amine-silanol cooperative catalytic activity. Furthermore, samples functionalized with rigid meta-substituted aminophenyl groups in ethanol showed higher catalytic efficiency than the corresponding sample containing the amine groups at the para-position, possibly due to the close proximity of the bifunctional groups in the former. The capping of ungrafted silanols with noncatalytic organosilanes in toluene resulted in reduction of catalytic activities, confirming the involvement of silanols. PMID:19360970

Sharma, Krishna K; Buckley, Robert P; Asefa, Tewodros

2008-12-16

407

[Discussion on the figure-description in the author's case with "acute alcoholic scenic complex hallucination"--against the criticism of HENRY Ey in his "Traité des hallucinations"].  

PubMed

1. The author formerly reported three cases with rare "scenic complex hallucinations" as acute alcoholic response. The patients experienced and stated such scenic hallucinations as incoherent dreams, if they were back to that specific circumstances; emotionally alive (anxiety) and reacted (counterattack, escape, confusion and so on) to that exact memories based on their experiences. 2. Attached is the figure that explains the detail correctly, which has been published in another article (Masuho KONUMA: On the Constitution of the Scenic Complex Hallucination in Acute Hallucinosis, CODEN: HDIZAB 37(3), 469-496, 1989 and so on). 3. HENRY EY criticized in "Traité des hallucinations" that the hallucination is only genuine in subjective experience of the patient and can not be drawn as a picture and that although the details might be described verbally, the image may be changed due to excessive explanation. He concluded that picture shown as FIG. I. is unacceptable. 4. The author has many publications on his own "dream records" and believes that subjective experiences in dreams could be expressed correctly in the form of picture. 5. The pictures show the mechanism of such hallucinations more correctly with the stories of the patients. I believe that these case reports are sufficient to let readers consent the possibilities of the mechanism. PMID:8818110

Konuma, M

1996-06-01

408

The national effort to improve access to trauma care: an interview with U.S. Representative Henry A. Waxman. Interview by Cynthia A. Brown.  

PubMed

The United States Congress is currently considering legislation to encourage states to plan, develop, and implement regional trauma care systems. The two bills--S. 10, introduced by Senator Alan Cranston (D-CA), and H.R. 3133, introduced by Representative Jim Bates (D-CA)--would require that these systems comply with the trauma care standards developed by the American College of Surgeons' Committee on Trauma. Significant progress is being made toward enactment of the House bill, H.R. 3133, due in large part to the efforts of the proposal's original cosponsor, Representative Henry A. Waxman (D-CA). Representative Waxman is Chairman of the Energy and Commerce Subcommittee on Health and the Environment, which has jurisdiction over federal programs involving emergency medical services systems, and he has played a key role in shaping and refining the House bill. In recognition of recent Congressional action designating May as National Trauma Awareness Month, Representative Waxman agreed to be interviewed for the Bulletin and to discuss H.R. 3133 and his view of the federal government's role in improving access to expert care for victims of injury. PMID:10287529

Waxman, H A

1988-06-01

409

Synthesis and characterization of new chiral Cu(ii)-N4 complexes and their application in the asymmetric aza-Henry reaction.  

PubMed

Cu(ii) Schiff base complexes Cu(ii)- and Cu(ii)- based on 2-acetyl pyridine with both (1R,2R)-1,2-diaminocyclohexane and (1S,2S)-1,2-diaminocyclohexane were synthesized in a single step. Subsequent reduction of ligands and with NaBH4 followed by complexation with Cu(OTf)2 resulted in generation of two more additional chiral centers in complexes Cu(ii)- and Cu(ii)-. The ligands and their corresponding complexes were well characterized by several spectral techniques like (1)H-NMR, (13)C-NMR, LC-MS, CD, UV-Vis spectroscopy and microanalysis. The respective Cu(ii) complexes derived from ligands and were investigated using both the solution and solid state EPR spectra. The particular orientation of the reduced complex with Cu(OTf)2 was confirmed by the X-ray crystal structure of the corresponding complex. All the catalytic protocols were applied in the asymmetric aza-Henry reaction to evaluate the catalytic properties of the Cu(ii) complexes in the present study. PMID:24988542

Das, Anjan; Kureshy, Rukhsana I; Maity, Nabin Ch; Subramanian, P S; Khan, Noor-Ul H; Abdi, Sayed H R; Suresh, E; Bajaj, Hari C

2014-07-22

410

Repeat airborne LiDAR reveals the sensitivity of erosion and deposition patterns to bed topography and grain size distributions, Henry Mountains, Utah  

NASA Astrophysics Data System (ADS)

Repeat 2008 and 2011 NCALM airborne LiDAR data bracket a large 2010 storm over the Henry Mountains, Utah. This flood caused significant channel erosion and deposition, both of which locally exceeded 2 meters. We compare LiDAR difference maps to surface grain size distributions and channel bed topography to better understand factors that influenced the spatial distributions of elevation changes. Complete river bed topography was resolved over many kilometers because channels were dry when scanned. Systematic variations in grain size distributions among channels were measured by conducting pebble counts. Individual counts consisted of a minimum of 250 measured clasts to allow for robust statistics on coarse grain distributions, with grain sizes ranging from sand to boulders. Bed topography maps and field measurements indicate that channel morphology varies systematically with local grain size distributions and in particular with the abundance of boulders. Reach morphologies range from step-pools to gravel plane-beds along individual channels. We generalize channel topography using various roughness metrics and apply similar metrics to the spatial distribution of topographic changes. Channel width constrictions, common in these canyons, tend to cause net deposition upstream and erosion downstream of these reaches. We also found that areas of erosion and deposition tend to change more abruptly along channels with coarser sediment because immobile grains (often large boulders) act as local base level controls. However, it appears that overall erosion and deposition patterns are not strongly correlated with local channel slope or other characteristics of reach morphology. We interpret this to indicate that before the 2010 flood, channel reaches were already adjusted to local flow conditions in previous floods, through surface grain size sorting and other morphological adjustments. Although erosion and deposition were locally significant from the 2010 flood, most channel reaches may have already been near a statistical equilibrium with floods of similar magnitudes.

Johnson, J. P.; Olinde, L.

2013-12-01

411

Calculating Henry?s Constants of Charged Molecules Using SPARC  

EPA Science Inventory

SPARC Performs Automated Reasoning in Chemistry is a computer program designed to model physical and chemical properties of molecules solely based on thier chemical structure. SPARC uses a toolbox of mechanistic perturbation models to model intermolecular interactions. SPARC has ...

412

JB-300: An Advanced Medium Size Transport for 2005.  

National Technical Information Service (NTIS)

In the fall of 1992, the TAC Team was presented with a Request for Proposal (PFP) for a mid-size (250-350 passenger) commercial transport. The aircraft was to be extremely competitive in the areas of passenger comfort, performance, and economic aspects. T...

G. Debrouwer K. Graham J. Ison V. Juarez S. Moskalik

1993-01-01

413

Henry's law constants measurements of the nonylphenol isomer 4(3',5'-dimethyl-3'-heptyl)-phenol, tertiary octylphenol and ?-hexachlorocyclohexane between 278 and 298 K  

NASA Astrophysics Data System (ADS)

Henry's Law Constants (HLC, M atm -1) were determined for the diastereomeric mixture of the nonylphenol isomer 4(3',5'-dimethyl-3'-heptyl)-phenol diastereomers (NP353(+) and NP353(-)), tertiary octylphenol ( t-OP) and ?-hexachlorocyclohexane ( ?-HCH) in artificial seawater over a temperature range 278-298 K using a dynamic equilibrium system. Trace organic substances present in the gas phase were trapped by tandem XAD-2 cartridges and extracted with a soxhlet extractor. The extracts were derivatived with N,O-bis(trimethylsilyl)-trifluoroacetamide (BSTFA), and then analyzed with GC-MS in the selective ion mode. At 293 K and in artificial seawater, HLC (M atm -1) were found to be equal to: NP353(+), HLC=(483±169); NP353(-), HLC=(551±193); t-OP, HLC=(400±140); ?-HCH, HLC=(876±307). The obtained data were used to derive the following Van't Hoff expressions: ln HLC (NP353(+))=8.73 (±0.95)×(1000/T) -23.61 (±3.30); ln HLC (NP353(-))=8.61 (±0.91)×(1000/T)-23.08 (±3.18); ln HLC ( t-OP)=9.03 (±1.40)×(1000/T)-24.83 (±4.86); ln HLC ( ?-HCH)=6.17 (±1.08)×(1000/T)-14.28 (±3.75). The derived enthalpies of solvation for NP353(+), NP353(-), t-OP and ?-HCH are -72.6±7.9, -71.6±7.6, -75.1±11.5 and -51.3±9.0 kJ mol -1, respectively. The HLC measurements of ?-HCH, which was used as reference substance, were in good agreement with literature values and its corresponding derived enthalpy of solvation agrees well to the previous values reported in the literature. A reassessment of the air/water gas exchange based on experimentally derived HLC was made for the nonylphenol (NP) in the Lower Hudson River estuary (New York/New Jersey, USA) that was previously reported by Van Ry. A net atmospheric deposition was calculated for the gas exchange of NP in the Lower Bay ( Ffw=0.13), and it nearly reaches the condition of equilibrium in the Upper Bay ( Ffw=0.46).

Xie, Zhiyong; Le Calvé, Stéphane; Feigenbrugel, Valérie; Preuß, Thomas G.; Vinken, Ralph; Ebinghaus, Ralf; Ruck, Wolfgang

414

[The pacifism of Henry Dunant].  

PubMed

From various writings of the founder of the International Red Cross and above all from his late work L'avenir sanglant it is deduced as the Dunant anticipating and prophetically interpreting the curse of the war is an internationalist (for some aspects a romantic anarchist) and a convinced pacifist. We show therefore how much has been false and backbiters the defamations that followed to the attribution of the first Nobel prize for the peace. PMID:18450034

Ottaviani, R; Vanni, P; Barra, M

2007-01-01

415

Electrical Researches of Henry Cavendish  

NASA Astrophysics Data System (ADS)

Introduction; Account of Cavendish's writings on electricity; 1. First published papers on electricity; 2. Preliminary propositions; 3. Appendix; 4. Thoughts concerning electricity; 5. Account of the experiments; 6. Second published paper on electricity; 7. Experiments in 1771; 8. Experiments in 1772; 9. Index to electrical experiments, 1773; 10. Measures; 11. Experiments with the artificial torpedo; 12. Resistance to electricity; 13. Calibration of tubes; 14. Resistance of copper wire; 15. Result; 16. Results; Notes by the editor; Index.

Clerk Maxwell, James; Cavendish, Henry

2010-05-01

416

"Nutritional and chemopreventive anti-cancer agents up-regulate expression of p27Kip1, a cyclin-dependent kinase inhibitor, in mouse JB6 epidermal and human MCF7, MDA-MB-321 and AU565 breast cancer cells"  

PubMed Central

Background p27(Kip1) is a cyclin-dependent kinase inhibitor. When up-regulated, p27 inhibits G1-to-S phase transition of the cell cycle. This report addresses the question of whether various nutritional and chemopreventive anti-cancer agents up-regulate the expression of p27 in preneoplastic and neoplastic cells. Results Experimental evidence presented in the first half of this report shows that these agents fairly faithfully up-regulate expression of p27 in mouse epidermal (JB6) and human breast cancer (MCF7, MDA-MB-321, and AU565) cells. Up-regulation appears to be specific to p27 because expression of cyclin D1, E, and A, and p21Cip1/Waf1 was not modulated by these agents. Up-regulation of the expression of p27 is likely due to the activation of translation rather than transcription of p27 because (a) up-regulation is mediated by the 5'-untranslated region (-575) of the p27 gene and (b) the antibiotic actinomycin D, an inhibitor of transcription, did not attenuate the up-regulation of p27. This latter finding is likely to preclude the existence of cryptic transcription factor binding site(s) in the 5'-untranslated region of p27 gene. The experimental evidence, presented in the second half of this report, was obtained using the 5'-untranslated region (-575) of p27 gene. The evidence suggests that cancer preventive agents up-regulate expression of p27 by at least four different molecular signaling pathways: (a) Caloric restriction is likely to up-regulate p27 expression via 5'-AMP-activated protein kinase (AMPK; a metabolic energy sensor or cellular fuel gauge), tuberous sclerosis complex (TSC), and mammalian target of rapamycin (mTOR). Amino acid deficiencies also up-regulate the expression of p27 using some components of this pathway. (b) 4-Hydroxytamoxifen (but not tamoxifen), genistein (but not genistin), daidzein, and probably other nutritional and chemopreventive anti-cancer agents could up-regulate expression of p27 via receptor protein tyrosine kinases (RPTKs), phosphoinositide 3-kinase (PI3K), phosphoinosite-dependent kinase (PDK), Akt/PKB and mTOR. (c) Expression of p27 could also be up-regulated via RPTKs followed by MAPKs – MEK, ERK and p38MAPK – and probably MNK. Finally, (d) global hypomethylation of 5'-m7G cap of mRNAs could also up-regulate expression of p27. Conclusion Based on these findings, we conclude that various nutritional and chemopreventive anti-cancer agents up-regulate expression of p27 in (pre)neoplastic cells.

Eto, Isao

2006-01-01

417

Periodic Spacing of Channel-Spanning Potholes in Navajo Sandstone, Henry Mountains Utah: Implications for Propagation of Incision Pulses across Tributary Junctions  

NASA Astrophysics Data System (ADS)

Incision of the Colorado River at Glen Canyon over the past ~1 Ma triggered pulses of incision that have migrated upstream through tributary drainages. The rate of incision of small tributaries often lags behind that of trunk streams, creatng over-steepened reaches at the tributary junction. In the arid Colorado Plateau, many of these low-order tributaries in massive lithologies have developed sequences of channel-spanning, periodically-spaced pothole bedforms. Although the dynamics of pothole formation and evolution are poorly understood, the occurrence of potholes correlates with super-critical flow and tools-limited conditions. We are exploring the hypothesis that pothole spacing and other profile attributes can be used to reconstruct the propagation of waves of incision through a drainage network. Here we report preliminary results of a field study of potholed reaches in steep, low-order channels draining Navajo Sandstone in the Henry Mountains, Utah. Our survey focused on channels where overlying sedimentary units and pediment deposits have largely been removed from the Navajo Sandstone. We surveyed six tributaries of the middle fork of Trail Canyon, and one tributary of Milk Creek, which are, in turn, minor tributaries of the Colorado River. We surveyed the long profile of each channel using a 5-m rod, 100-m tape, and a clinometer. In bedrock reaches, we focused on quantifying the spacing of alternating pothole steps and bedrock chutes, and the elevation change within and between potholes steps. We also characterized individual potholes by width, depth, maximum sediment size captured, and direction of flow recirculation. In alluviated reaches, we measured the bankfull width and depth to estimate relative differences in bankfull discharge. We also measured channel geometry in higher-order trunk streams at the junctions with the surveyed tributaries. Our preliminary results include the successful prediction of locations where potholed channels were found, by comparing topographic and geologic maps to estimate the character and quantity of coarse sediment supply. Where diorite pediments and overlying sedimentary rocks have been removed by erosion from above the Navajo Sandstone, pothole channels are common. Although the presence of grinders contributes to pothole abrasion, observations suggest that low supply rates of coarse sediment are essential for pothole development. Particularly important is low supply of the relatively hard diorite derived from the laccolithic cores of nearby Mt. Hillers and Mt. Holmes. In many potholes the only sediments present were sand-sized and finer. In each of the surveyed tributary channels we observed regular spacing of pothole bed forms. Preliminary analysis suggests a characteristic spacing of pothole steps that varies systematically with reach gradient, drainage area and other tributary attributes. Further analysis will allow us to explore the relationships between the morphology of potholed channels and the relative incision rates of the tributary and the trunk streams. It may be possible, for example, to assess the relative incisional efficiency of tributaries with differing extents of pothole development.

Barnes, C. M.; Sklar, L. S.; Whipple, K. X.; Johnson, J. P.

2004-12-01

418

Recent advances in thermal desorption-gas chromatography-mass spectrometery method to eliminate the matrix effect between air and water samples: application to the accurate determination of Henry's law constant.  

PubMed

Accurate values for the Henry's law constants are essential to describe the environmental dynamics of a solute, but substantial errors are recognized in many reported data due to practical difficulties in measuring solubility and/or vapor pressure. Despite such awareness, validation of experimental approaches has scarcely been made. An experimental approach based on thermal desorption-gas chromatography-mass spectrometery (TD-GC-MS) method was developed to concurrently allow the accurate determination of target compounds from the headspace and aqueous samples in closed equilibrated system. The analysis of six aromatics and eight non-aromatic oxygenates was then carried out in a static headspace mode. An estimation of the potential bias and mass balance (i.e., sum of mass measured individually from gas and liquid phases vs. the mass initially added to the system) demonstrates compound-specific phase dependency so that the best results are obtained by aqueous (less soluble aromatics) and headspace analysis (more soluble non-aromatics). Accordingly, we were able to point to the possible sources of biases in previous studies and provide the best estimates for the Henry's constants (Matm(-1)): benzene (0.17), toluene (0.15), p-xylene (0.13), m-xylene (0.13), o-xylene (0.19), styrene (0.27); propionaldehyde (9.26), butyraldehyde (6.19), isovaleraldehyde (2.14), n-valeraldehyde (3.98), methyl ethyl ketone (10.5), methyl isobutyl ketone (3.93), n-butyl acetate (2.41), and isobutyl alcohol (22.2). PMID:24704185

Kim, Yong-Hyun; Kim, Ki-Hyun

2014-05-16

419

Open quantum systems and Dicke superradiance  

NASA Astrophysics Data System (ADS)

We study generic features of open quantum systems embedded into a continuum of scattering wavefunctions and compare them with results discussed in optics. A dynamical phase transition may appear at high level density in a many-level system and also in a two-level system if the coupling W to the environment is complex and sufficiently large. Here nonlinearities occur. When W ij is imaginary, two singular (exceptional) points may exist. In the parameter range between these two points, width bifurcation occurs as function of a certain external parameter. A unitary representation of the S matrix allows to calculate the cross section for a two-level system, including at the exceptional point (double pole of the S matrix). The results obtained for the transition of level repulsion at small (real) W ij to width bifurcation at large (imaginary) W ij show qualitatively the same features that are observed experimentally in the transition from Autler-Townes splitting to electromagnetically induced transparency in optics. Fermi's golden rule holds only below the dynamical phase transition while it passes into an anti-golden rule beyond this transition. The results are generic and can be applied to the response of a complex open quantum system to the action of an external field (environment). They may be considered as a guideline for engineering and manipulating quantum systems in such a way that they can be used for applications with special requirements.

Eleuch, Hichem; Rotter, Ingrid

2014-03-01

420

Tom, Dick, and Mary discover the DFT  

Microsoft Academic Search

Discrete Fourier techniques are increasingly being taught as material detached from fundamental continuous-time Fourier analysis. The student is left with an unclear understanding, if any, of the very significant relationships between magnitude and phase spectra generated digitally, and the continuous-time signal which is being analyzed. The present article tells the story of three undergraduate students who discover the DFT, armed

1994-01-01

421

Effect of advanced aircraft noise reduction technology on the 1990 projected noise environment around Patrick Henry Airport. [development of noise exposure forecast contours for projected traffic volume and aircraft types  

NASA Technical Reports Server (NTRS)

A study has been conducted of the future noise environment of Patric Henry Airport and its neighboring communities projected for the year 1990. An assessment was made of the impact of advanced noise reduction technologies which are currently being considered. These advanced technologies include a two-segment landing approach procedure and aircraft hardware modifications or retrofits which would add sound absorbent material in the nacelles of the engines or which would replace the present two- and three-stage fans with a single-stage fan of larger diameter. Noise Exposure Forecast (NEF) contours were computed for the baseline (nonretrofitted) aircraft for the projected traffic volume and fleet mix for the year 1990. These NEF contours are presented along with contours for a variety of retrofit options. Comparisons of the baseline with the noise reduction options are given in terms of total land area exposed to 30 and 40 NEF levels. Results are also presented of the effects on noise exposure area of the total number of daily operations.

Cawthorn, J. M.; Brown, C. G.

1974-01-01

422

Come Look with Me: Exploring Landscape Art with Children.  

ERIC Educational Resources Information Center

Describes and provides samples from a book on art appreciation by looking at landscape paintings with children. Reproduces four paintings, offers questions to use with students, and presents information on the artists and their pictures. The paintings are by George Inness, Henri Rousseau, Stuart Davis, and Edward Hopper. (JB)

Blizzard, Gladys S.

1992-01-01

423

Un cosmologiste oublié: Jean Henri Lambert  

NASA Astrophysics Data System (ADS)

Si les travaux de Kepler ont eu une large influence sure les progrès réalisés en astronomie au cours du 17e siècle, le Siècle de lumières a vu apparaître de nouvelles conceptions. La court vie de J.H. lambert s'inscrit dans le 18e siècle. Il s'agit d'un nom bien connu dans différents domaines (photométrie, projections cartographiques, mathématiques appliquées, etc.); mais il n'est guàre mentionné en cosmologie, alors que Lambert y a fourni une contribution originale offrant quelques suprenantes anticipations...

Débarbat, Suzanne; Lévy, Jacques

424

Henri Poincaré: New methods of celestial mechanics.  

NASA Astrophysics Data System (ADS)

This three-volume set presents an English translation of Poincaré's "Les méthodes nouvelles de la mécanique céleste", originally published in 1892 - 1899. An introduction, by D. L. Goroff, provides samples of some of the historical studies, mathematical surveys, and personal homages that have been written about Poincaré and his work. Its goal is to make a great but difficult work more accessible to contemporary readers.

Goroff, D. L.

425

Wonder Lake, McHenry County, Illinois.  

National Technical Information Service (NTIS)

Annual total phosphorus and total nitrogen loadings to the lake were estimated and subdivided according to either point or non-point source origin. An assessment of the lake's trophic condition and limiting nutrient is also provided. All data collected by...

1975-01-01

426

MHC class Jb-restricted cell responses to Listeria monocytogenes infection.  

PubMed

Murine infection with Listeria monocytogenes induces CD8+ T cell responses specific for bacterial peptides that are presented on the infected cell surface by MHC class Ia and MHC class Ib molecules. We have used MHC tetramers to demonstrate that CD8+ T cells restricted by the H2-M3 MHC class Ib molecules constitute a substantial portion of the T cell response to L. monocytogenes infection. The in vivo size and kinetics of MHC class Ib-restricted T cell populations suggests that they play a prominent role in bacterial clearance following primary L. monocytogenes infection. PMID:10631569

Kerksiek, K M; Pamer, E G

1999-12-01

427

Was Dick Tracy Right? Do Magnetic Fields Rule the Cosmos?  

NASA Astrophysics Data System (ADS)

Astronomers generally subordinate magnetic forces to gravitational ones at all but the smallest scales. The 'Dual Proposal', however, introduces a new scale, ?o=400 pc [1]. Here the photon has a real mass and the graviton an imaginary one, both of mc2=hc/?o = 10 - 25 eV. The resulting sinusoidal gravitational potential (? = - (GM/r) Cos[kor], ko=2 ?/?o) does not compromise solar system dynamics, explains the large tidal forces observed in the Milky Way, and predicts that the Galaxy has a central, physical stationary bar. The sinusoidal potential is powerless to bind large amorphous objects such as clusters of galaxies (or the Universe itself). Here one needs the massive photon (? = (Q/r) Exp[- kor]). Chibisov (1976) has shown that at large scales (s>>?o), a massive photon will generally provide an attractive force rather than the usual repulsive one of the massless photon. At recent meetings of the AAS I have shown how the new cosmic magnetic fields can bind the Coma cluster or strip the gas (and plasma) from the stars in the Bullet Collision (Clowe et al 2006). In this poster, I demonstrate how magnetic fields can replace gravitational ones in cosmology. Two elements are critical. The Dark Ages are needed to explain the evolution of the scale factor a(t) from the time of nucleosynthesis to the present. Gravitational energy densities (?W/?V= (1/2) ?? ) and magnetic energy densities (?W/?V= (1/2) J.A ) are now absolute and thus meaningful. Ref [1]: "Analogies between electricity and gravity", Metrologia 41 (2004) S115-S124.

Bartlett, David F.

2007-12-01

428

Martin 'Dick' Wittenborg 1914-1969: a legacy.  

PubMed

The life of Martin H. Wittenborg was short. During his tenure at Boston Children's Hospital, he wrote brilliant papers based on his observations regarding such entities as intestinal malrotation and vascular rings and slings. He wrote about his extensive experience using radiotherapy in the treatment of neuroblastoma and its effects on the growing spine. This article reflects the memories of some of his students, who describe him as a brilliant teacher. His effect on so many and his contributions are all the more remarkable considering the fact that Wittenborg was deaf. PMID:24413878

Behr, Gerald G; Berdon, Walter E

2014-04-01

429

The Dicke model dynamics in a high detuning limit  

NASA Astrophysics Data System (ADS)

We study a lossless interaction of two-level atoms with a quantum field in the high detuning limit. The possibility of creating atomic Schrödinger cat states [Agarwal, Puri, Singh, Phys. Rev. A 56 (1997) 2249] for different initial field states is discussed. Dipole moment evolution and atomic squeezing are also considered.

Klimov, A. B.; Saavedra, C.

1998-10-01

430

The 'pure-IP' Moby Dick 4G architecture  

Microsoft Academic Search

Abstract Network operators, service providers and customers are players who have different interests and raise different requirements on the functionality of future mobile communication networks. However, some new capabilities, such as mobility, security, ubiquity and quality are spelled out by all, which means that there exist some fundamental mechanisms which are in fact needed in every network. This paper concentrates

Jürgen Jähnert; Jie Zhou; Rui L. Aguiar; Victor Marques; Michelle Wetterwald; Eric Melin; Jose Ignacio Moreno; Antonio Cuevas; Marco Liebsch; Ralf Schmitz; Piotr Pacyna; Telemaco Melia; Pascal Kurtansky; Hasan; Davinder Singh; Sebastian Zander; Hans J. Einsiedler; Burkhard Stiller

2005-01-01

431

The 'pure-IP' Moby Dick 4G architecture  

Microsoft Academic Search

Network operators, service providers and customers are players who have different interests and raise different requirements on the functionality of future mobile communication networks. However, some new capabilities, such as mobility, security, ubiquity and quality are spelled out by all, which means that there exist some fundamental mechanisms which are in fact needed in every network. This paper concentrates on

Jurgen Jahnerta; Jie Zhoua; Rui L. Aguiarb; Victor Marquesc; Eric Meline; Jose I. Morenof; Hans J. Einsiedlerk

432

Henry B. Plant (1819-1899): Florida's west coast entrepreneur  

Microsoft Academic Search

Purpose – Entrepreneurship is increasingly recognized as vital for economies to grow and survive in an increasingly competitive world. Studying the critical success factors of entrepreneurial activity is and will continue to be a primary scholarly interest. Factors that have been identified in current times as critical to the success of entrepreneurs can even be seen in the actions of

Robert C. Ford; Peter B. Petersen

2011-01-01

433

Does hydrology have a soul?(Henry Darcy Medal Lecture)  

NASA Astrophysics Data System (ADS)

Water is the distinguishing feature of Earth. Its presence sustains life, business, energy and romance. Hydrology is the science of water. Hence, it is one of the most relevant and exciting of the planetary sciences. But, does hydrology as it is taught and practiced today achieve this potential? Is understanding and predicting the hydrological cycle really in the domain of today's hydrologists? I intend to present a personal view of some puzzles as well as fundamental issues that define hydrology as a fertile ground of scientific inquiry that emerges at the intersection of the planetary and life sciences, and of course human behavior. I plan to outline 5 main questions whose explicit or implicit pursuit characterizes the essence of the hydrological being.

Lall, Upmanu

2014-05-01

434

Biography 11: Alfred Henry Sturtevant (1891-1970)  

NSDL National Science Digital Library

Alfred Sturtevant was a student of Thomas Hunt Morgan. Sturtevant provided proof of genetic linkage. Bridges advanced the theory of chromosomal non-disjunction, and did a lot of work on chromosomal banding patterns.

2009-12-26

435

A random walk on water (Henry Darcy Medal Lecture)  

NASA Astrophysics Data System (ADS)

Randomness and uncertainty had been well appreciated in hydrology and water resources engineering in their initial steps as scientific disciplines. However, this changed through the years and, following other geosciences, hydrology adopted a naïve view of randomness in natural processes. Such a view separates natural phenomena into two mutually exclusive types, random or stochastic, and deterministic. When a classification of a specific process into one of these two types fails, then a separation of the process into two different, usually additive, parts is typically devised, each of which may be further subdivided into subparts (e.g., deterministic subparts such as periodic and aperiodic or trends). This dichotomous logic is typically combined with a manichean perception, in which the deterministic part supposedly represents cause-effect relationships and thus is physics and science (the "good"), whereas randomness has little relationship with science and no relationship with understanding (the "evil"). Probability theory and statistics, which traditionally provided the tools for dealing with randomness and uncertainty, have been regarded by some as the "necessary evil" but not as an essential part of hydrology and geophysics. Some took a step further to banish them from hydrology, replacing them with deterministic sensitivity analysis and fuzzy-logic representations. Others attempted to demonstrate that irregular fluctuations observed in natural processes are au fond manifestations of underlying chaotic deterministic dynamics with low dimensionality, thus attempting to render probabilistic descriptions unnecessary. Some of the above recent developments are simply flawed because they make erroneous use of probability and statistics (which, remarkably, provide the tools for such analyses), whereas the entire underlying logic is just a false dichotomy. To see this, it suffices to recall that Pierre Simon Laplace, perhaps the most famous proponent of determinism in the history of philosophy of science (cf. Laplace's demon), is, at the same time, one of the founders of probability theory, which he regarded as "nothing but common sense reduced to calculation". This harmonizes with James Clerk Maxwell's view that "the true logic for this world is the calculus of Probabilities" and was more recently and epigrammatically formulated in the title of Edwin Thompson Jaynes's book "Probability Theory: The Logic of Science" (2003). Abandoning dichotomous logic, either on ontological or epistemic grounds, we can identify randomness or stochasticity with unpredictability. Admitting that (a) uncertainty is an intrinsic property of nature; (b) causality implies dependence of natural processes in time and thus suggests predictability; but, (c) even the tiniest uncertainty (e.g., in initial conditions) may result in unpredictability after a certain time horizon, we may shape a stochastic representation of natural processes that is consistent with Karl Popper's indeterministic world view. In this representation, probability quantifies uncertainty according to the Kolmogorov system, in which probability is a normalized measure, i.e., a function that maps sets (areas where the initial conditions or the parameter values lie) to real numbers (in the interval [0, 1]). In such a representation, predictability (suggested by deterministic laws) and unpredictability (randomness) coexist, are not separable or additive components, and it is a matter of specifying the time horizon of prediction to decide which of the two dominates. An elementary numerical example has been devised to illustrate the above ideas and demonstrate that they offer a pragmatic and useful guide for practice, rather than just pertaining to philosophical discussions. A chaotic model, with fully and a priori known deterministic dynamics and deterministic inputs (without any random agent), is assumed to represent the hydrological balance in an area partly covered by vegetation. Experimentation with this toy model demonstr

Koutsoyiannis, D.

2009-04-01

436

Mythic Imagery and Irish Nationalism: Henry Grattan against Union, 1800.  

ERIC Educational Resources Information Center

Discusses the use of mythical images to create a transcendent vision of order and analyzes the efforts of a leading Irish speaker as he argued against legislative union with Great Britain in 1800. (VLC)

Fulmer, Hal W.

1986-01-01

437

Effect of Ceramide on Intracellular Glutathione Determines Apoptotic or Necrotic Cell Death of JB6 Tumor Cells  

Microsoft Academic Search

Selective induction of cell death is a means to remove unwanted cell populations from a tissue or organ. Understanding the signal- ing events responsible for mediating cell death by cytokines, such as tumor necrosis factor-alpha (TNFa) are key to the development of pharmacologic inducers of this response. Ceramide has been implicated as a secondary messenger for TNFa-induced cell death, but

M. A. Davis; J. A. Flaws; M. Young; K. Collins; N. H. Colburn

2000-01-01

438

Reading in a Participatory Culture: Remixing "Moby-Dick" in the English Classroom  

ERIC Educational Resources Information Center

Building on the groundbreaking research of the MacArthur Foundation's Digital Media & Learning initiative, this book crosses the divide between digital literacies and traditional print culture to engage a generation of students who can read with a book in one hand and a mouse in the other. "Reading in a Participatory Culture" tells the story of an…

Jenkins, Henry, Ed.; Kelley, Wyn, Ed.

2013-01-01

439

Finite-temperature Dicke phase transition of a Bose-Einstein condensate in an optical cavity  

NASA Astrophysics Data System (ADS)

In this paper we investigate the finite-temperature properties of a Bose-Einstein condensate (BEC)-cavity system with a strong nonlinear atom-photon interaction by means of a functional path-integral approach. It is shown that the experimentally observed phase diagram [Baumann, Guerlin, Brennecke, and Esslinger, Nature (London)NATUAS0028-083610.1038/nature09009 464, 1301 (2010)] can be better explained in our finite-temperature theory. More importantly, we identify a new dynamical unstable phase in this experiment. By tuning various experimental parameters, we reveal some rich temperature-driven phase diagrams and, in particular, predict a four-phase coexistence point. Finally, we find analytically that the specific heat in the superradiant phase increases exponentially at lower temperatures. Moreover, it has a large jump at the temperature-driven critical point where the superradiant-normal phase transition occurs. As a result, we argue that the specific heat can serve as a powerful tool to probe the thermodynamic properties of the BEC-cavity system.

Zhang, Yuanwei; Lian, Jinling; Liang, J.-Q.; Chen, Gang; Zhang, Chuanwei; Jia, Suotang

2013-01-01

440

A simulation guided analytical approach to the theory of the Dick effect [frequency standard  

Microsoft Academic Search

A pulse-mode operated frequency standard is considered, based on the Ramsey double interaction method. Phase noise of the interrogating signal appears as “end-to-end phase difference”, thereby introducing frequency noise in the loop. Pulsed operation of the standard down-converts by aliasing the phase noise around harmonics of the pulse rate. The analysis offered in this paper is based on phase noise

L. L. Presti; F. Patane; D. Rovera; A. De Marchi

1996-01-01

441

Do Cyborg Dreams Emancipate Sheep? (with Apologies to Philip K. Dick).  

ERIC Educational Resources Information Center

A full investigation into how and why the expression of potential benefits of computers in schools is hindered would need to consider many aspects, but one point that should be considered is the ever-tightening integration of educational institutions into the global economy. Evidence of the accelerating assimilation of schools into the economy…

Bromley, Hank

442

Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre.  

PubMed

Unlike photons, which are conveniently handled by mirrors and optical fibres without loss of coherence, atoms lose their coherence via atom-atom and atom-wall interactions. This decoherence of atoms deteriorates the performance of atomic clocks and magnetometers, and also hinders their miniaturization. Here we report a novel platform for precision spectroscopy. Ultracold strontium atoms inside a kagome-lattice hollow-core photonic crystal fibre are transversely confined by an optical lattice to prevent atoms from interacting with the fibre wall. By confining at most one atom in each lattice site, to avoid atom-atom interactions and Doppler effect, a 7.8-kHz-wide spectrum is observed for the (1)S0-(3)P1(m=0) transition. Atoms singly trapped in a magic lattice in hollow-core photonic crystal fibres improve the optical depth while preserving atomic coherence time. PMID:24934478

Okaba, Shoichi; Takano, Tetsushi; Benabid, Fetah; Bradley, Tom; Vincetti, Luca; Maizelis, Zakhar; Yampol'skii, Valery; Nori, Franco; Katori, Hidetoshi

2014-01-01

443

Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre  

PubMed Central

Unlike photons, which are conveniently handled by mirrors and optical fibres without loss of coherence, atoms lose their coherence via atom–atom and atom–wall interactions. This decoherence of atoms deteriorates the performance of atomic clocks and magnetometers, and also hinders their miniaturization. Here we report a novel platform for precision spectroscopy. Ultracold strontium atoms inside a kagome-lattice hollow-core photonic crystal fibre are transversely confined by an optical lattice to prevent atoms from interacting with the fibre wall. By confining at most one atom in each lattice site, to avoid atom–atom interactions and Doppler effect, a 7.8-kHz-wide spectrum is observed for the 1S0?3P1(m=0) transition. Atoms singly trapped in a magic lattice in hollow-core photonic crystal fibres improve the optical depth while preserving atomic coherence time.

Okaba, Shoichi; Takano, Tetsushi; Benabid, Fetah; Bradley, Tom; Vincetti, Luca; Maizelis, Zakhar; Yampol'skii, Valery; Nori, Franco; Katori, Hidetoshi

2014-01-01

444

The Constructive Marginal of "Moby-Dick": Ishmael and the Developmental Model of Intercultural Sensitivity  

ERIC Educational Resources Information Center

Cultural sensitivity theory is the study of how individuals relate to cultural difference. Using literature to help students prepare for study abroad, instructors could analyze character and trace behavior through a model of cultural sensitivity. Milton J. Bennett has developed such an instrument, The Developmental Model of Intercultural…

Morgan, Jeff

2011-01-01

445

Unique relationship between interfacial tension test (IFT) and neutral number test (Acidity) of transformer insulation oil in PLN P3B JB - Jakarta and Banten Regional  

Microsoft Academic Search

Transformers are one of some important equipment on electricity network. Each utility, in this case PLN P3B Jawa-Bali, has to assure their reliability in order to maintain electrical power system stability by assessing transformer conditions. Insulation system, which consists of liquid and solid insulation, is the most important part of transformer system. The performance of transformer will depend on its

H. Gumilang

2009-01-01

446

Bronya J.B. Keats, Arthur N. Popper, Richard R. Fay (Editors) Springer handbook of auditory research: genetics and auditory disorders  

Microsoft Academic Search

Several compelling messages have emerged from the study of severe hearing loss in humans. First, the wonderfully complex detail of the molecular pathways required for the normal development and maintenance of this critical sensation has been revealed. Second, few if any of these pathways appear to be amenable targets for therapeutic intervention and\\/or supplementation. Finally, the very individuals these studies

Richard C. Trembath

2004-01-01

447

Two Novel Glycosides from the Fruits of Morinda Citrifolia (Noni) Inhibit AP1 Transactivation and Cell Transformation in the Mouse Epidermal JB6 Cell Line1  

Microsoft Academic Search

The fruit juice of Morinda citrifolia (noni), a plant originally grown in the Hawaiian and Tahitian islands, has long been used by islanders to treat diseases, including cancer. Two novel glycosides, 6-O-(b-D-glucopy- ranosyl)-1-O-octanoyl-b-D-glucopyranose and asperulosidic acid, ex- tracted from the juice of noni fruits, were used to examine their effects on 12-O-tedtradecanoylphorbol-13-acetate (TPA)- and epidermal growth factor (EGF)-induced AP-1 transactivation

Guangming Liu; Ann Bode; Wei-Ya Ma; Shengmin Sang; Chi-Tang Ho; Zigang Dong

2001-01-01

448

Steady state entanglement of two atoms created by classical driving field  

NASA Astrophysics Data System (ADS)

The stabilization of entanglement[1-7] caused by action of a classical driving field in the system of two-level atoms with the dipole interaction accompanied by spontaneous emission is discussed. An exact solution shows that the maximum amount of concurrence that can be achieved in Lamb-Dicke limit is 0.43. Dependence of entanglement on interatomic distance and classical driving field, beyond Lamb-Dicke limit, is examined numerically. [1] ö. Cakir, A. Klyachko, and A. Shumovsky, quant-ph/0406081 [2] R. Tana's and Z. Ficek, J. Opt. B 6, S610 (2004); quant-ph/0309195. [3] S.G. Clark and A.S. Parkins, Phys. Rev. A 90, 047905 (2003 ). [4] B. Kraus and J.I. Cirac, Phys. Rev. Lett. 92, 013602 (2004) . [5] S. Nicolosi, A. Napoli, A. Messina, F. Petruccione, Phys. Rev. A 70, 022511 (2004). [6] J.B. Xu and S.B. Li, quant-ph/0401010. [7] M.A. Can, ö. Cakir, A.A. Klyachko, and A.S. Shumovsky, Phys. Rev. A 68, 022305 (2003).

Cakir, Ozgur

2005-03-01

449

Another Look at Holistic Art Education: Exploring the Legacy of Henry Schaefer-Simmern  

ERIC Educational Resources Information Center

In his forward to "Curriculum in Abundance" (2006), curriculum theorist William Pinar suggests that education should offer opportunities for "self-formation" which include the cultivation of our capacity to surrender, begin again, and dwell in possibility. This paper examines the theory and art education practices of a forgotten and often…

Gradle, Sally Armstrong

2009-01-01

450

Genesis of the tabular-type vanadium-uranium deposits of the Henry Basin, Utah  

USGS Publications Warehouse

Tabular-type vanadium-uranium deposits occur in fluvial sandstones of the Salt Wash Member of the Morrison Formation of Late Jurassic age The mineralized intervals and the weakly mineralized lateral extensions are bounded both above and below by zones rich in dolomite cement. Carbon isotope values of dolomite cements indicate that at least two sources of carbon existed. One source appears to be the same as that which formed the bedded carbonates in the evaporites in the Tidwell Member of the Morrison Formation stratigraphically below the mineralized interval. The second carbon source is typical of terrestrially deposited carbonates generally associated with meteoric water-dominated environments. Oxygen isotope values of these dolomites show the same trend of isotopically light values above the mineralized interval and isotopically heavier values in and below that interval; they indicate that two isotopically distinct fluids were involved in the mineralizing process. Some aspects of the origin of gangue and ore phases are explainable on the basis of processes which occurred solely within the saline fluid, but key aspects of ore genesis involved the interaction of the saline and meteoric waters. It is postulated that the solution interface migrated vertically within the stratigraphic section. -from Authors

Northrop, H. R.; Goldhaber, M. B.

1990-01-01

451

Vanadium chlorite from a sandstone-hosted vanadium-uranium deposit, Henry basin, Utah.  

USGS Publications Warehouse

This ore deposit formed by reduction and precipitation of U and V in the presence of organic matter at the interface between a stagnant brine and overlying circulating meteoric water. Some samples of the vanadium chlorite (heated before analysis) contain = or >10% V2O5; in fresh samples most of the V is in the V3+ state. XRD data suggest that Fe and V are concentrated preferentially in the interlayer hydroxide sheets of the chlorite. A d060 value of 1.52 A indicates that the chlorite probably has a dioctahedral structure distended by the presence of octahedral Fe and V; it is a IIb polytype. The V ore zone is flanked by peripheral zones with perfectly ordered chlorite/smectite containing much less V than the pure chlorite. Chemical analysis of a sample heated to 900oC before analysis gave SiO2 44.89, Al2O3 25.14, TiO2 0.35, Fe2O3 8.29, MgO 8.47, CaO 0.84, Na2O 0.27, K2O 2.18, Li2O 0.16, UO3 0.92, V2O5 9.14, = 100.65, together with Cr 10, Mn 200, Co 150, Ni 5.8, Cu 10, Zn 140 ppm; XRD, DTG, TG and IR curves are presented. -R.A.H.

Whitney, G.; Northrop, H. R.

1986-01-01

452

Health Hazard Evaluation Report No. HETA 82-116-1319, Modine Manufacturing, McHenry, Illinois.  

National Technical Information Service (NTIS)

To evaluate employee exposures to chromic acid at a condenser dipping operation, in March 1982 NIOSH investigators collected a bulk sample of the dip solution, and, in May 1982, environmental samples were collected, local exhaust ventilation measurements ...

D. Almaguer R. Kramkowski

1983-01-01

453

Enhanced Preliminary Assessment Report: Patrick Henry Army Housing Units, Newport News, Virginia.  

National Technical Information Service (NTIS)

Argonne National Laboratory has conducted an enhanced preliminary assessment of the Army housing property located in Newport News, VA. The objectives of this assessment include identifying and characterizing all environmentally significant operations, ide...

1989-01-01

454

Universal Plotkinism: A Review Of Henry Plotkin’s Darwin Machines And The Nature of Knowledge  

Microsoft Academic Search

Plotkin's Darwin Machines and the Nature of Knowledge (1993) is a major contribution to the field of evolutionary epistemology and universal Darwinism. Evolutionary epistemology is the idea that evo- lution is a knowledge-gaining process. Universal Darwinism holds that processes of variation and selection can be observed at different levels from the primary level of biological evolution (where genes code for

C. D. L. WYNNE

2001-01-01

455

Henry B. duPont Middle School. Alexis I. duPont School District.  

ERIC Educational Resources Information Center

The best techniques of individualized instruction have been utilized in the development of the program in this new middle school. Team teaching will provide for large and small group instruction plus opportunities for independent study. The teacher teams will utilize both the horizontal and vertical organizational approach. Diagrams of the…

Whiteside, Moeckel and Carbonell, Architects, Wilmington, DE.

456

Hybrid larch (Larix x eurolepis Henry): a good candidate for cadmium phytoremediation?  

PubMed

Studies related to phytoremediation by conifers are still at their beginning. Thus, we investigated the ability of a hybrid larch (Larix x eurolepis) to accumulate cadmium (Cd). One-month-old clonal plantlets grown in vitro were exposed for 1 week to a high Cd concentration (1.5 mM). No significant effect was observed on root and shoot biomass, root length, and needle number as a result of Cd treatment. Leaf photosynthetic pigment content and total soluble protein concentration in roots and shoots remained unchanged compared to control plantlets. Taken together, these results suggested that hybrid larch tolerated Cd in our conditions. The high Cd concentration in shoots (200 ?g Cd gram(-1) dry weight) showed the good capacity of larch to translocate Cd and thus a potential use of this species for phytoremediation. Furthermore, under our conditions, phytochelatin biosynthesis pathway was slightly stimulated, suggesting that this pathway did not reach the threshold and/or another mechanism of Cd storage may be involved to explain larch tolerance to Cd. PMID:23288674

Moudouma, Chris Fabien Moussavou; Riou, Catherine; Gloaguen, Vincent; Saladin, Gaëlle

2013-03-01

457

Henry Primakoff Award Talk: Tests of Lorentz and CPT violation with neutrinos  

NASA Astrophysics Data System (ADS)

Lorentz violation is a predicted phenomenon from the Planck scale physics. Although the three active massive neutrino framework with the Standard Model (SM), so-called the neutrino Standard Model (?SM), is successful, series of signals not understood within the ?SM suggest neutrino physics may be the first place to see the physics beyond the SM, such as Lorentz violation. Especially, neutrino oscillations are the natural interferometer and they are sensitive to the Lorentz violation with comparable sensitivity with precise optical experiments. The LSND oscillation signal was analyzed under the Standard Model Extension (SME) framework, and it was found that the oscillation data was consistent with no Lorentz violation, but data cannot reject Lorentz violation hypothesis with order ˜10-17. By assuming LSND signal was due to the Lorentz violation, a global phenomenological model was made to describe all known oscillation data including the LSND signal. The model also predicted the signal for MiniBooNE at the low energy region. Later, MiniBooNE announced an event excess at the low energy region. However, the oscillation candidate signals from MiniBooNE were consistent with no Lorentz violation. The limit obtained by MiniBooNE and MINOS on the e-? sector reject the simple scenario to explain LSND signal with Lorentz violation. Meantime, MINOS and IceCube set tight limits on the ?-? sector Lorentz violation. The last untested channel, the e-? Lorentz violating mixing, was tested using reactor disappearance data from Double Chooz. However, Double Chooz data was consistent with flat, and sidereal time dependent Lorentz violation hypothesis is rejected. Combinations of all oscillation data from LSND, MiniBooNE, MINOS, IceCube, and Double Chooz provide very tight constraint for a possible Lorentz violation in the neutrino sector in terrestrial level.

Katori, Teppei

2013-04-01

458

46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.  

Code of Federal Regulations, 2011 CFR

(d) A line drawn from the westernmost extremity of Ocracoke Island at latitude 35°04â² N. longitude 76°00.8â² W. to the northeasternmost extremity of Portsmouth Island at latitude 35°03.7â² N. longitude 76°02.3â²...

2013-10-01

459

A CRITICAL REVIEW OF HENRY'S LAW CONSTANTS FOR ENVIRONMENTAL APPLICATIONS. (R825689C059)  

EPA Science Inventory

The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Concl...

460

Henri D.Grissino-Mayer's Ultimate Tree-Ring Web Pages  

NSDL National Science Digital Library

This clearinghouse offers various means by which users can access information and resources on dendrochronology and such associated fields as paleoclimatology, plant anatomy, palynology, systematics, taxonomy, cladistics, and the study of permineralized plants and petrified forests. The most basic method is by way of the Contents page, which alphabetically combines those items, concepts, keywords, and phrases of interest addressed by the clearinghouse nodes. An alternate approach, under Resources, is intended primarily for use by dendrochronologists and contains material on conferences and workshops, tree-ring, climate, and paleoclimatic data, references about tree-rings, and educational resources for teachers. The Links page contains connections to major laboratories at academic institutions, additional tree-ring research sites, published tree-ring research abstracts, abstracts of National Science Foundation (NSF) funded tree-ring research, and personal home pages of tree-ring enthusiasts. The Software page leads to sites including ftp sites where dendrochronologists can download and/or purchase programs useful in their discipline. The Principles of Dendrochronology pages include definitions of key terms in the discipline, followed by explanations of the Uniformitarian Principle and the Principles of Limiting Factors, Aggregate Tree Growth, Ecological Amplitude, Site Selection, Crossdating, and Replication. The References page is categorized according to such specific interests as dendropyrochronology and dendroglacialogy. Also available are links to various Databases, Supplies for dendrochronologists, a gallery of photographs, a FAQ page, a What's New section covering the latest developments and announcements in the field, and a search engine specific to the site. Notably, the author has provided either an annotation or review for every link included on the site.

Grissino-Mayer, Henri

461

Henry James: A Collection of Critical Essays. Twentieth Century Views Series.  

ERIC Educational Resources Information Center

One of a series of works aimed at presenting contemporary critical opinion on major authors, this collection includes essays by Leon Edel, Joseph Conrad, Max Beerbohm, Ezra Pound, Edith Wharton, Percy Lubbock, Virginia Woolf, T. S. Eliot, Van Wyck Brooks, Edmund Wilson, E. M. Forster, William Troy, Pelham Edgar, Stephen Spender, Graham Greene,…

Edel, Leon, Ed.

462

The Scientific Papers of the Honourable Henry Cavendish, F. R. S. 2 Volume Set  

NASA Astrophysics Data System (ADS)

Volume 1: Preface Sir Joseph Larmor; Introduction; First published paper on electricity, 1771; Preliminary propositions; Appendix; Thoughts concerning electricity; Account of the experiments; Second published paper on electricity, 1776; Experiments in 1771; Experiments in 1772; Experiments in 1773; Measurers; Experiments with the artificial torpedo; Resistance to electricity; Results of comparisons of charges; Results on resistance; Notes by the editor, 1879 James Clerk Maxwell; Life of Cavendish Thomas Young; Index to Cavendish Manuscripts. Volume 2: Introduction; Reprint of papers communicated by Cavendish to the Royal Society and published in the Philosophical Transactions; Unpublished papers from the original manuscripts in the possession of the Duke of Devonshire, K. G., LL. D., F. R. S.; Cavendish's mathematical and dynamical manuscripts Sir Joseph Larmor; Cavendish as a geologist Sir Archibald Geikie; Cavendish's astronomical manuscripts Sir Frank W. Dyson; Cavendish's magnetic work Charles Chree; Index.

Cavendish, Henry; Clerk Maxwell, James; Thorpe, Edward, , Sir; Larmor, Joseph, , Sir

2011-02-01

463

A New Aesthetic of Closure: The Non-Linear Cosmologies of Henry Kreisel and Toni Morrison  

Microsoft Academic Search

The Judaeo-Christian mythic tradition postulates a universe with absolute limits in both time and space, as typified by the biblical books Genesis and Revelations. In the first chapter of my thesis I examine the way in which works of literature written from within this tradition necessarily have definite endings characterized by a return to a state of unity and an

Thomas Patrick Shea

1995-01-01

464

The Reverend Dr William Henry Dallinger, F.R.S. (1839-1909).  

PubMed

William Dallinger illustrates a social outsider concerned with the application of science to the physical, intellectual and spiritual health of his homeland, who forced his way into the scientific life of his nation. His path was encouraged by mentors such as William McKenny who steered him into the Methodist ministry, James Drysdale who helped him get established as a scientist and John Tyndall, Thomas Huxley and Charles Darwin who encouraged his scientific efforts and smoothed his way into his nation's highest scientific circles. The shadowy figures of John Wesley and John Ray played a role in affirming the validity of his scientific interests and concerns for science education. PMID:11624308

Haas, J W

2000-01-01

465

The bright minds beyond our machines: Henry Coand? and his ideas.  

PubMed

Most cardiologists rarely remember that new ideas dedicated initially to completely different areas, are the technological background of most medical devices. Also, they almost ignore the bright minds beyond these ideas. The Coand? effect, vital in the color-Doppler assessment of valvular regurgitations with eccentric jets--bears the name of a Romanian inventor whose life (1886-1972) was mostly dedicated to aeronautics and who is considered the 'father' of jet engines. His fluid dynamics discovery was patented in 1934, but its importance for medical applications was recognized much later. PMID:17413300

Coman, Ioan Mircea

2007-04-01

466

HENRY'S LAW CONSTANTS AND MICELLAR PARTITIONING OF VOLATILE ORGANIC COMPOUNDS IN SURFACTANT SOLUTIONS  

EPA Science Inventory

Partitioning of volatile organic compounds (VOCs) into surfactant micelles affects the apparent vapor-liquid equilibrium of VOCs in surfactant solutions. This partitioning will complicate removal of VOCs from surfactant solutions by standard separation processes. Headspace expe...

467

FastHenry: a multipole-accelerated 3-D inductance extraction program  

Microsoft Academic Search

In [1], ii was shown that an equaiion formulation based on mesh analysis can be combined with a GMRES-style iterative matrix solution technique to make a reasonably fast 3-D frequency dependent inductance and resistance extraction algorithm. Unfortunately, both the computation time and memory required for that approach grow faster than n2, where n is the number of volume-filaments. In this

Mattan Kamon; Michael J. Tsuk; Jacob White

1993-01-01

468

Generator and exciter parameter estimation of Fort Patrick Henry Hydro Unit 1  

SciTech Connect

This paper describes the techniques employed for extraction of device parameters for a 20 MVA hydro-turbine generator in the Tennessee Valley Authority (TVA) power system. Several approaches were implemented in the extraction of parameters. Measurements on the generator were made prior, and subsequent, to extensive rework as part of a generator upgrade project. In addition, static exciter and overall response tests on the complete system were performed after the upgrade. The identified generator parameters before and after the upgrade are compared.

Chow, J.H.; Glinkowski, M.T.; Murphy, R.J.; Cease, T.W.; Kosaka, Naoki

1999-12-01

469

The schoolmaster of all Ireland: The progressive credentials of Patrick Henry Pearse 1879-1916  

Microsoft Academic Search

Patrick Pearse’s status in Ireland today oscillates between the iconic and kitsch: he was recently voted by readers of a newspaper as the person whom they would most like to see commemorated by a statue or monument in central Dublin (though this proposal has not met with universal approval even with that publication’s staff) and as one of the most

David Limond

2005-01-01

470

The Henry Ford Production System: LEAN Process Redesign Improves Service in the Molecular Diagnostic Laboratory  

PubMed Central

Accurate and timely molecular test results play an important role in patient management; consequently, there is a customer expectation of short testing turnaround times. Baseline data analysis revealed that the greatest challenge to timely result generation occurred in the preanalytic phase of specimen collection and transport. Here, we describe our efforts to improve molecular testing turnaround times by focusing primarily on redesign of preanalytic processes using the principles of LEAN production. Our goal was to complete greater than 90% of the molecular tests in less than 3 days. The project required cooperation from different laboratory disciplines as well as individuals outside of the laboratory. The redesigned processes involved defining and standardizing the protocols and approaching blood and tissue specimens as analytes for molecular testing. The LEAN process resulted in fewer steps, approaching the ideal of a one-piece flow for specimens through collection/retrieval, transport, and different aspects of the testing process. The outcome of introducing the LEAN process has been a 44% reduction in molecular test turnaround time for tissue specimens, from an average of 2.7 to 1.5 days. In addition, extending LEAN work principles to the clinician suppliers has resulted in a markedly increased number of properly collected and shipped blood specimens (from 50 to 87%). These continuous quality improvements were accomplished by empowered workers in a blame-free environment and are now being sustained with minimal management involvement.

Cankovic, Milena; Varney, Ruan C.; Whiteley, Lisa; Brown, Ron; D'Angelo, Rita; Chitale, Dhananjay; Zarbo, Richard J.

2009-01-01