Institution
State University of New York System
Education•Albany, New York, United States•
About: State University of New York System is a education organization based out in Albany, New York, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 54077 authors who have published 78070 publications receiving 2985160 citations.
Topics: Population, Poison control, RNA, Gene, Receptor
Papers published on a yearly basis
Papers
More filters
••
TL;DR: This work investigated a penalized weighted least-squares (PWLS) approach to address this problem in two dimensions, where the WLS considers first- and second-order noise moments and the penalty models signal spatial correlations.
Abstract: Reconstructing low-dose X-ray computed tomography (CT) images is a noise problem. This work investigated a penalized weighted least-squares (PWLS) approach to address this problem in two dimensions, where the WLS considers first- and second-order noise moments and the penalty models signal spatial correlations. Three different implementations were studied for the PWLS minimization. One utilizes a Markov random field (MRF) Gibbs functional to consider spatial correlations among nearby detector bins and projection views in sinogram space and minimizes the PWLS cost function by iterative Gauss-Seidel algorithm. Another employs Karhunen-Loeve (KL) transform to de-correlate data signals among nearby views and minimizes the PWLS adaptively to each KL component by analytical calculation, where the spatial correlation among nearby bins is modeled by the same Gibbs functional. The third one models the spatial correlations among image pixels in image domain also by a MRF Gibbs functional and minimizes the PWLS by iterative successive over-relaxation algorithm. In these three implementations, a quadratic functional regularization was chosen for the MRF model. Phantom experiments showed a comparable performance of these three PWLS-based methods in terms of suppressing noise-induced streak artifacts and preserving resolution in the reconstructed images. Computer simulations concurred with the phantom experiments in terms of noise-resolution tradeoff and detectability in low contrast environment. The KL-PWLS implementation may have the advantage in terms of computation for high-resolution dynamic low-dose CT imaging
519 citations
••
University of Pittsburgh1, United States Army Research Laboratory2, State University of New York System3, Dalian University of Technology4, University of Wisconsin-Madison5, Hiroshima University6, University of Notre Dame7, Tohoku University8, Central South University9, Delft University of Technology10
TL;DR: The motivation of this perspective paper is to summarize the state-of-art topology optimization methods for a variety of AM topics and the hope is to inspire both researchers and engineers to meet the challenges with innovative solutions.
Abstract: Manufacturing-oriented topology optimization has been extensively studied the past two decades, in particular for the conventional manufacturing methods, for example, machining and injection molding or casting. Both design and manufacturing engineers have benefited from these efforts because of the close-to-optimal and friendly-to-manufacture design solutions. Recently, additive manufacturing (AM) has received significant attention from both academia and industry. AM is characterized by producing geometrically complex components layer-by-layer, and greatly reduces the geometric complexity restrictions imposed on topology optimization by conventional manufacturing. In other words, AM can make near-full use of the freeform structural evolution of topology optimization. Even so, new rules and restrictions emerge due to the diverse and intricate AM processes, which should be carefully addressed when developing the AM-specific topology optimization algorithms. Therefore, the motivation of this perspective paper is to summarize the state-of-art topology optimization methods for a variety of AM topics. At the same time, this paper also expresses the authors' perspectives on the challenges and opportunities in these topics. The hope is to inspire both researchers and engineers to meet these challenges with innovative solutions.
518 citations
••
TL;DR: In this paper, a nation is a nation, is a state, is an ethnic group is a …. Ethnic and Racial Studies: Vol. 1, No. 4, pp. 377-400.
Abstract: (1978). A nation is a nation, is a state, is an ethnic group is a … . Ethnic and Racial Studies: Vol. 1, No. 4, pp. 377-400.
518 citations
••
TL;DR: The purpose of this report is to update researchers on the progress of the WIHS and to provide information on WIHS resources, the methods by which they were obtained, and background for any new potential researchers interested in conducting collaborative research through shared use of these resources.
Abstract: The Women's Interagency HIV Study (WIHS) is an ongoing long-term observational study of 3,772 women who are either infected with human immunodeficiency virus (HIV) or considered to be at risk for acquiring HIV. Since 1994, the WIHS (pronounced like “wise”) has developed a large database and specimen repository that serve as resources for WIHS investigators as well as for nonaffiliated researchers working on HIV-related or HIV coinfection issues. The purpose of this report is to update researchers on the progress of the WIHS and to provide information on WIHS resources, the methods by which they were obtained, and background for any new potential researchers interested in conducting collaborative research through shared use of these resources.
518 citations
••
TL;DR: A striking maintenance of DNA replication granules and their distinct intranuclear arrangements with the remaining nuclear matrix structures despite the removal of greater than 90% of the total nuclear DNA is revealed.
Abstract: We have used fluorescent microscopy to map DNA replication sites in the interphase cell nucleus after incorporation of biotinylated dUTP into permeabilized PtK-1 kangaroo kidney or 3T3 mouse fibroblast cells. Discrete replication granules were found distributed throughout the nuclear interior and along the periphery. Three distinct patterns of replication sites in relationship to chromatin domains in the cell nucleus and the period of S phase were detected and termed type I (early to mid S), type II (mid to late S) and type III (late S). Similar patterns were seen with in vivo replicated DNA using antibodies to 5-bromodeoxyuridine. Extraction of the permeabilized cells with DNase I and 0.2 M ammonium sulfate revealed a striking maintenance of these replication granules and their distinct intranuclear arrangements with the remaining nuclear matrix structures despite the removal of greater than 90% of the total nuclear DNA. The in situ prepared nuclear matrix structures also incorporated biotinylated dUTP into replication granules that were indistinguishable from those detected within the intact nucleus.
518 citations
Authors
Showing all 54162 results
Name | H-index | Papers | Citations |
---|---|---|---|
Meir J. Stampfer | 277 | 1414 | 283776 |
Bert Vogelstein | 247 | 757 | 332094 |
Zhong Lin Wang | 245 | 2529 | 259003 |
Peter Libby | 211 | 932 | 182724 |
Robert M. Califf | 196 | 1561 | 167961 |
Stephen V. Faraone | 188 | 1427 | 140298 |
David L. Kaplan | 177 | 1944 | 146082 |
David Baker | 173 | 1226 | 109377 |
Nora D. Volkow | 165 | 958 | 107463 |
David R. Holmes | 161 | 1624 | 114187 |
Richard J. Davidson | 156 | 602 | 91414 |
Ronald G. Crystal | 155 | 990 | 86680 |
Jovan Milosevic | 152 | 1433 | 106802 |
James J. Collins | 151 | 669 | 89476 |
Mark A. Rubin | 145 | 699 | 95640 |