HEAVY QUARK POTENTIAL IN LATTICE QCD: A REVIEW OF RECENT PROGRESS AT CALTECH

1991 ◽  
Vol 02 (02) ◽  
pp. 637-658 ◽  
Author(s):  
H.-Q. DING
Keyword(s):  
Recent Progress ◽  
Critical Phenomenon ◽  
Parallel Computers ◽  
Ratio Method ◽  
Published Data ◽  
Wilson Loops ◽  
New Methods ◽  
Key Issues ◽  
Quark Potential ◽  
Heavy Quark Potential

Recent progress on the calculation of the [Formula: see text] – potential is reviewed. Scaling is discussed from the perspective of critical phenomenon. Methods for fitting the correlations of Polyakov operators and the Wilson loops are reviewed and two new methods, the iterative method and the improved ratio method, are discussed in detail. These new methods are used to analyze/re-analyze the previously published data on Polyakov loops and new data on large Wilson loops. Convincing numerical evidences together with several analytical arguments strongly support the conclusion that the asymptotic scaling sets in at β~6 with [Formula: see text] and α=0.43±0.03. These results agree well with the potential model analysis of experimental data on [Formula: see text] and [Formula: see text] systems, and favors the Neveu-Schwarz strings as the underlying string theory. Finally, key issues on the use of the parallel computers are explored, with the conclusion that parallel computers are highly suitable for these floating-point intensive computations.

Cell and Molecular Biological Challenges of ICSI: ART before Science?

1998 ◽  
Vol 26 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Gerald Schatten ◽  
Laura Hewitson ◽  
Calvin Simerly ◽  
Peter Sutovsky ◽  
Gabor Huszar
Keyword(s):  
Rhesus Monkeys ◽  
Nonhuman Primates ◽  
Assisted Reproductive Technologies ◽  
Clinical Investigation ◽  
Human Subjects ◽  
Reproductive Technologies ◽  
Published Data ◽  
New Methods ◽  
Institutional Review ◽  
Series Of Experiments

The general perception of how innovative assisted reproductive technologies (ART) are introduced is through a carefully controlled series of experiments in an animal model, such as the mouse. Only after the technique has been proven can one consider confirmatory studies on mammals closely related to humans, such as rhesus monkeys or other nonhuman primates. With this background of a peer-reviewed body of well-established published data, there is sufficient foundation and rationale to propose a clinical investigation to a responsible human subjects institutional review board (IRB). IRBs weigh the benefits and risks of the new methods to human subjects, and then consider the appropriate informed consent procedures for the particular case. Only after a large number of clinical studies are performed at multiple sites and are peer reviewed can the efficacy and safety of the innovative approach be clearly evaluated. At that time, the potential therapy can be responsibly offered to suitable beneficiaries.

scholarly journals Studies of Electron-Molecule Collisions on Distributed-memory Parallel Computers

1992 ◽  
Vol 45 (3) ◽  
pp. 325 ◽  
Author(s):  
Carl Winstead ◽  
Qiyan Sun ◽  
Paul G Hipes ◽  
Marco AP Lima ◽  
Vincent McKoy
Keyword(s):  
Distributed Memory ◽  
Recent Progress ◽  
Cost Effective ◽  
Parallel Computers ◽  
Polyatomic Molecules ◽  
Low Energy ◽  
Materials Processing ◽  
Challenging Problem ◽  
Molecular Systems ◽  
Critical Data

We review recent progress in the study of low-energy collisions between electrons and polyatomic molecules which has resulted from the application of distributed-memory parallel computing to this challenging problem. Recent studies of electronically elastic and inelastic scattering from several molecular systems, including ethene, propene, cyclopropane, and disilane, are presented. We also discuss the potential of ab initio methods combined with cost-effective parallel computation to provide critical data for the modeling of materials-processing plasmas.

Heavy Quark Potential and Quarkonium Spectrum in Nonperturbative pNRQCD

2013 ◽  
Vol 54 (7-10) ◽  
pp. 1027-1031 ◽  
Author(s):  
Yoshiaki Koma ◽  
Miho Koma
Keyword(s):  
Heavy Quark ◽  
Quark Potential ◽  
Heavy Quark Potential

scholarly journals A Lesson of Sustainability Given by The Tropical Modernism in Kinshasa: The BCB Headquarters by Maurice Houyoux

2021 ◽  
Vol 3 (1) ◽  
pp. p22
Author(s):  
Alexis Tshiunza ◽  
Manlio Michieletto ◽  
Olatunde Adedayo
Keyword(s):  
Building Materials ◽  
Relevant Literature ◽  
Weather Condition ◽  
Tropical Region ◽  
Published Data ◽  
The Sun ◽  
Existing Buildings ◽  
Key Issues ◽  
Observation Method ◽  
Belgian Congo

The tropical region is often considered as a region where the sun shines intensely and the temperature varies at certain times of the year. In the case of Congo, the average weather condition is considered cool, however, there have been cases where the temperature reached up to 43° C. It is therefore imperative for buildings in this region to take into account the temperature variation while considering the comfort of the users. During the design and construction of the Bank of Belgian Congo, the availability of data to assist the architect Maurice Houyoux in meeting the challenge of the region was unavailable. The architect had to be creative in planning and overcoming the challenges posed by the environment. This paper seeks to examine the issues confronted by Maurice Houyoux and the design solutions he provided to ensure that the building was functional and responded to the tropical challenges. In undertaking this study, a historical approach was adopted through the review of relevant literature on the building and designs within the period of the development of the bank. An observation method was also deployed to verify some of the information found in the literature. The findings are presented using pictures and sketches to explain some of the key issues relevant to the design of the bank. The findings showed that despite the reduced number of published data for designing in such a region, the architect was able to examine the existing buildings and discuss with users of other constructions to obtain relevant data. The findings also showed that the building was able to respond to peculiar requirements to be functional. The paper concludes that the local building materials and traditional builders can be used to achieve a contemporary building that fits into the context towards sustainable architecture.

scholarly journals 4SM: A Novel Self-calibrated Algebraic Ratio Method for Satellite Derived Bathymetry and Water Column Correction

2017 ◽  
Author(s):  
Yann George MOREL
Keyword(s):  
Water Column ◽  
Radiative Transfer Equation ◽  
Atmospheric Correction ◽  
Ratio Method ◽  
Published Data ◽  
Deep Waters ◽  
Bare Land ◽  
Depth Sounding ◽  
Radiance Data ◽  
The Ideal

All empirical water column correction methods have consistently been reported to require existing depth sounding data for the purpose of calibrating a simple depth retrieval model; they yield poor results over very bright or very dark bottoms. In contrast, we set out to (i) use only the relative radiance data in the image along with published data, and several new assumptions, (ii) in order to specify and operate the simplified radiative transfer equation (RTE), (iii) for the purpose of retrieving both the satellite derived bathymetry (SDB) and the water column corrected spectral reflectance over shallow seabeds. Sea truth regressions show that SDB depths retrieved by the method only need tide correction. Therefore it shall be demonstrated that, under such new assumptions, there is no need (i) for formal atmospheric correction, (ii) nor for conversion of relative radiance into calibrated reflectance , (iii) nor for existing depth sounding data, to specify the simplified RTE and produce both SDB and spectral water column corrected radiance ready for bottom typing. Moreover, the use of the panchromatic band for that purpose is introduced. Altogether, we named this process the Self-Calibrated Supervised Spectral Shallow-sea Modeler (4SM). This approach requires a trained practitioner, though, to produce its results within hours of downloading the raw image. The ideal raw image should be a “near-nadir” view, exhibit homogeneous atmosphere and water column, include some coverage of optically deep waters and bare land, and lend itself to quality removal of haze, atmospheric adjacency effect, and sun/sky glint.

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