196,253 research outputs found
Design studies of the muon detector for the SuperB experiment
No full textSuperB is one of the flagship projects of the Italian Govern and in 2010 has been approved.
Starting from the Conceptual Design Report (CDR), now the collaboration is moving to
the Technical Design Report (TDR). SuperB will be an asymmetric e+
Thermal stability of a strip crystal for channeling of halo particles in the Large Hadron Collider
No full textFor possible application of a silicon bent crystal as a beam collimator in the Large Hadron Collider, the thermal stability of a strip-like crystal has been studied. The thermal power generated by the beam inside the crystal has been evaluated through a simulation and used as a source in the heat equation. The equation has been solved numerically with the semi-analytical method of lines to show the thermal stability of crystal-assisted collimation with the parameters currently being considered for its exploitation. The method we presented appears to be useful for calculation of the thermal load concerning any situation involving Crystal channeling
Equation Implementational Forms-study Of Image-wave For Depth Remigration [estudo De Formas Implementacionais Da Equação Da Onda Imagem Para Remigração Em Profundidade]
No full textIn this work, we study theoretically and numerically new implementational forms of the image-wave equation tor depth remigration. This is a partial second-order differential equation similar to the acoustic wave equation. We determine, additionally to consistency and stability, the conditions for dispersion and dissipation of six finite-difference schemes for this equation in different forms, obtained by a change of variables. These conditions cannot be simultaneously satisfied, i.e., a precise result is not easily obtained. Numerical tests confirm the theoretical stability results for three of the investigated schemes but fail for the others. Of the tested schemes, the ones forward in the velocity variable and forward or backward in depth were the most useful ones in the sense that they satisfy the theoretical predictions about their stability and can be utilized to realize the image-wave propagation, the former for increasing velocities and the latter for decreasing velocities.264493504Method of velocity continuation in the problem of seis- mic time migration (1994) Russian Geology and Geophysics, 35, pp. 100-111. , FOMELSFOMEL, S., Time migration velocity analysis by velocity continua- tion (2003) Geophysics, 68, pp. 1662-1672HUBRAL, R., TYGEL, M., SCHLEICHER, J., Seismic image waves (1996) Geophysical Journal International, 125, pp. 431-442JAYA, M., BOTELHO, M., HUBRAL, P., LIEBHARDT, G., Remigration of ground-penetrating radar data (1999) Journal of Applied Geophysics, 41, pp. 19-30NOVAIS, A., COSTA, J.C., SCHLEICHER, J., GPR velocity determi- nation by Image-wave propagation (2008) Journal of Applied Geophysics, 65, pp. 65-72SCHLEICHER, J., NOVAIS, A., MUNERATO, F., Análise numérica da equação da onda imagem na profundidade. (2003) TEMA - Tendências em Matemática Aplicada e Computacional, 4, pp. 267-276SCHLEICHER, J., NOVAIS, A., MUNERATO, F., Migration velocity analysis by depth Image-wave remigration: First results (2004) Geophysical Prospecting, 52, pp. 559-574SCHLEICHER, J., COSTA, J.C., NOVAIS, A., Time migration velocity analysis by Image-wave propagation of common-Image gathers (2008) Geo- physics, 73, pp. VE161-VE171(1989) Finite Difference Schemes and Partial Differential Equations, , STRIKWERDAJ, Wadsworth & Brooks, California. 386 pTHOMAS, J., (1995) Numerical Partial Differential Equations, , Springer- Verlag, New York. 436 pTYGEL, M., SCHLEICHER, J., HUBRAL, P., Pulse distortion In depth migration (1994) Geophysics, 59, pp. 1561-156
FILM DI SILICE SOL-GEL PER LA PROTEZIONE DELLA CERAMICA NELL'ARCHITETTURA DI GIO' PONTI A MILANO
No full textThe church of Santa Maria Annunciata at San Carlo Borromeo Hospital in Milan is a prime example of contemporary architecture. The church was built between 1964 and 1967 by Gio Ponti (1891-1979), one of the main protagonists of XX Century Italian architecture. The unconventional choice of materials and shapes is the result of the architect's specific intent so their preservation is an important task in the conservation planning. The restoration project, through a careful analysis of the exterior facades degradation, highlighted a complex situation connected to contemporary art. The processes of surface alteration, synergistically caused by exposure to weathering, compositional aspects, constructive and material characteristics, show phenomena that cannot be found in historical buildings [1]. Particular attention was devoted to the external ceramic facing, made of glazed porcelain stoneware (or grès) tiles. The critical conservation status of the ceramic elements required an intervention for the consolidation of diffuse micro-cracking in the glassy coating and the protection of the still intact material. Silica thin films synthesized by sol-gel process, according to the technology developed by the Chemistry for Cultural Heritage research group (Department of Chemical Sciences, University of Padova), was used to perform an innovative protective treatment. This method involves a new synthetic path to obtain highly pure glassy silica thin films operating at low temperatures and in a neutral environment. The deposition of films is performed closely to neutral pH conditions, in order to avoid degradation of objects sensitive to acidic or basic environment. The slow drying process carried out at ambient temperature does not require the heat treatments necessary for the traditional sol-gel method and thus avoids possible damages to the substrate [2]. Phenomena involved in weathering, as well as chemical and morphological characteristics of the ceramic materials, were analysed and considered in planning the protective treatment. Compatibility with the glass substrate, stability to solar radiation, chemical corrosion and biological degradation resistance, durability and inalterability of the optical characteristics of the material are all features in accordance with the restoration needs. The encouraging results obtained show that this new technology can be widely used as an effective alternative to traditional methods, often based on the use of synthetic organic polymers
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Indagini chimico-fisiche per la caratterizzazione dei materiali impiegati nell’esecuzione della Pala di Santa Giustina
No full textIndagini chimico-fisiche mediante strumentazioni di laboratorio (IR, SEM) e trasportabili (micro FS) per la caratterizzazione dei materiali impiegati nell’esecuzione della Pala di Santa Giustin
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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