196,222 research outputs found
Data mining and knowledge discovery resources for astronomy in the web 2.0 age
No full textThe emerging field of AstroInformatics, while on the one hand appears crucial to face the technological challenges, on the other is opening new exciting perspectives for new astronomical discoveries through the implementation of advanced data mining procedures. The complexity of astronomical data and the variety of scientific problems, however, call for innovative algorithms and methods as well as for an extreme usage of ICT technologies. The DAME (DAta Mining & Exploration) Program exposes a series of web-based services to perform scientific investigation on astronomical massive data sets. The engineering design and requirements, driving its development since the beginning of the project, are projected towards a new paradigm of Web based resources, which reflect the final goal to become a prototype of an efficient data mining framework in the data-centric era. © 2012 SPIE
A quadratic divisor problem and moments of the Riemann zeta-function
No full textWe estimate asymptotically the fourth moment of the Riemann zeta-function twisted by a Dirichlet polynomial of length T 1/4^(−ε). Our work relies crucially on Watt's theorem on averages of Kloosterman fractions. In the context of the twisted fourth moment, Watt's result is an optimal replacement for Selberg's eigenvalue conjecture.
Our work extends the previous result of Hughes and Young, where Dirichlet polynomials of length T 1/11^(−ε) were considered. Our result has several applications, among others to the proportion of critical zeros of the Riemann zeta-function, zero spacing and lower bounds for moments.
Along the way we obtain an asymptotic formula for a quadratic divisor problem, where the condition am₁m₂−bn₁n₂=h is summed with smooth averaging on the variables m₁,m₂,n₁,n₂,h and arbitrary weights in the average on a,b. Using Watt's work allows us to exploit all averages simultaneously. It turns out that averaging over m₁,m₂,n₁,n₂,h right away in the quadratic divisor problem considerably simplifies the combinatorics of the main terms in the twisted fourth moment
Catalogue des tableaux anciens composant la collection de M. le prince Radziwill... / [expert] Ferdinand La Neuville
No full text[Vente. Art. 1865-05-16 - 1865-05-24. Paris][Collection. Art. Radziwill, Sigismond. 1865]Référence bibliographique : Lugt, 28526Appartient à l’ensemble documentaire : VenteEST2Avec mode text
Catalogue de la première partie des tableaux anciens... composant la collection de M. le prince Radziwill... / [expert] Ferdinand Laneuville
No full text[Vente. Art. 1865-05-23. Paris][Collection. Art. Radziwill, Sigismond. 1865]Référence bibliographique : Lugt, 28546Appartient à l’ensemble documentaire : VenteEST2Avec mode text
Many faces of Maria Lupu-Radziwill.
No full textStraipsnyje pristatomi ir analizuojami Jonušo Radvilos (1612– 1655) antrosios žmonos Marijos Lupu-Radvilienės atvaizdai (apie 1625– 1660). Nagrinėjamos galimos kunigaikštienės portretų sukūrimo aplinkybės. Koreguojamos netikslios anksčiau menotyrininkų ir istorikų skelbtos šių portretų atribucijos. Analizuojamos priežastys, dėl kurių dalis M. Lupu- Radvilienės atvaizdų buvo priskiriama kitiems asmenims. Neteisingai atributuoti jos portretai tapo tarytum kitų asmenų „dalyvavimo“ atvaizduose ar reprezentavimo kaukėmis. Reikšminiai žodžiai: Marija Lupu-Radvilienė; Portretas; Radvilos (Radziwill; Radvila family); Maria Lupu-Radziwill; PortraitThe paper analyses the portraits of Maria Lupu (c. 1625–1660), daughter of the ruler of Moldova Duchy and the second wife of Janušas Radvila (1612–1655), made specifically during the period between mid 17th century and mid 19th century. The paper takes into account only the portraits and their later copies depicting Lupu in her mature age, and is dedicated to the question of false attribution. The research attempts to clarify their dating and the conditions of their creation. Only a few portraits that were made during her lifetime survived to this day: the National Museum of the Republic of Belarus has a painting by Johan Schretter that depicts both wives of Radvila—Lupu and Kotryna Potockytė; the portrait of a lady which was recently identified as Lupu, stored in Rosenborg Castle in Copenhagen, Denmark; and a possible copy of the latter portrait reproduced in the publication Theatrum Europaeum (1652). Warsaw National Museum also has a portrait from the series of “Laureal Leaves” which is possibly modelled after the painting held in Rosenberg Castle. The only references to the vanished group portrait of Radvila with his two wives are the drawing by Ferdinandas Friderikas Vilhelmas Radvila (1834–1926) and the watercolours created by Karolis Račinskis (1799–1860) in the first half of the 18th century (the latter depict the figures separately). As many as three portraits of Lupu were misidentified and turned into symbolic masks for other people. First, it is the Rosenborg Castle portrait which was once thought to depict M. Stricka. The second one is a portrait held in a private collection—painted on a wooden plinth, it dates back to the 18th century and is once thought to depict Barbora Radvilaitė. This portrait is likely to be created as a copy of the reproduction printed in Theatrum Europaeum. The third case belongs to one of the two portraits that depicts the duchess in the Radvila family album Familiae Ducalis Radivillianae—it has a signature that falsely identifies it with Kotryna Tomicka. The image has been created according to the portrait painted by Johan Schretter who portrayed Lupu alongside Radvila’s first wife Kotryna Potockytė. The analysis showed that the false attribution of these portraits could have occurred due to the misinterpretation of the attributes of status and lineage
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
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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