190 research outputs found
Effects of Temperature and Light on Aerial Breathing of the Longnose Gar, Lepisosteus Osseus
No full textAuthor Institution: Department of Zoology, University of OklahomaSAKSENA, VISHNU P. Effects of temperature and Light on Aerial Breathing of the Longnose Gar, Lepisosteus osseus. Ohio J. Sci. 72(1): 58, 1975
Cross-layer Design for Interference Mitigation and Mobility Support in Wireless Access Networks
No full textStony Brook University Libraries.
SBU Graduate School in Computer Science.
Lawrence Martin (Dean of Graduate School), Dr. Samir R. Das
Advisor
Associate Professor of Computer Science, Dr. Tzi-cker Chiueh
Professor of Computer Science, Dr. Himanshu Gupta
Assistant Professor of Computer Science, Dr. Samrat Ganguly
Research Staff Member
NEC Labs America at Princeton
Cross-layer Design for Interference Mitigation and Mobility Support in Wireless Access Networks
No full text[to be added
An Analysis of Symphony No. 19 ( Vishnu ) by Alan Hovhaness, and Kshetrajna , an Original Composition for Orchestra.
No full textThis dissertation consists of two parts, both of which share a common link through their inspiration from Hinduism. Part I is an analysis of Hovhaness\u27s Symphony No. 19 (Vishnu). Part II is an original composition in three movements for orchestra entitled Kshetrajna. Hovhaness\u27s Symphony No. 19 (Vishnu), composed between July and August, 1966, in Luzern, Switzerland, is a single movement work of tripartite structure, for symphony orchestra. The title, Vishnu, refers to the second person of the Hindu trinity, whose name is a remarkable metaphor for the explosive energies and sustaining forces of the universe. The work is impressionistic in a sense; Hovhaness achieves a great wealth of atmospheric effects, highly suggestive of cosmic space and events (viz., exploding galaxies, vast emptiness and timelessness). Hovhaness is very much a mystic, and this one quality is poignantly manifested in Vishnu through the many Eastern and mesmeric devices employed in the work. In the following analysis the various parameters of form, tonality and modality, senza misura practices, melody and vertical sonority found in Hovhaness\u27s 19th symphony are described in depth. The second part of the dissertation, Kshetrajna, is an original orchestral composition in three movements by the author. The title, Kshetrajna, is a Sanskrit term meaning knower of the field. The work draws its inspiration from the thirteenth chapter of the Bhagavad Gita in which Krishna relates to Arjuna knowledge about the field (physical manifestation in its totality) and its knower (the conscious ego). Two basic motives are thus interwoven through the course of the work, and manipulated in diverse ways. The three movements generally adhere to the scheme, fast-slow-fast, respectively. The movements are essentially through-composed, and follow no traditional formal outlines
Design and evaluation of iMesh: An infrastructure-mode wireless mesh network
No full textWe design and evaluate iMesh, an infrastructure-mode 802.11-based mesh network. Here, 802.11 access points double as routers making the network architecture completely transparent to mobile clients, who view the network as a conventional wireless LAN. Layer-2 handoffs between access points trigger routing activities inside the network, which can be thought of as layer-3 handoffs. We describe the design rationale, and a testbed implementation of iMesh. We present results related to the handoff performance. The results demonstrate excellent handoff performance, the overall latency varying between 50-100ms depending on different layer-2 techniques, even when a fivehop long route update is needed. Various performance measurements also demonstrate the clear superiority of a flat routing scheme relative to a more traditional, mobile IPlike scheme to handle layer-3 handoff.
The iEBE-VISHNU code package for relativistic heavy-ion collisions
No full textThe iEBE-VISHNU code package performs event-by-event simulations for relativistic heavy-ion collisions using a hybrid approach based on (2 + 1)-dimensional viscous hydrodynamics coupled to a hadronic cascade model. We present the detailed model implementation, accompanied by some numerical code tests for the package. iEBE-VISHNU forms the core of a general theoretical framework for model-data comparisons through large scale Monte-Carlo simulations. A numerical interface between the hydrodynamically evolving medium and thermal photon radiation is also discussed. This interface is more generally designed for calculations of all kinds of rare probes that are coupled to the temperature and flow velocity evolution of the bulk medium, such as jet energy loss and heavy quark diffusion. Program summary Program title: iEBE-VISHNU Catalogue identifier: AEYA_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEYA_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 5257939 No. of bytes in distributed program, including test data, etc.: 262822421 Distribution format: tar.gz Programming language: Fortran, C++, python, bash, SQLite. Computer: Laptop, desktop, cluster. Operating system: Tested on GNU/Linux Ubuntu 12.04 x64, Red Hat Linux 6, Mac OS X 10.8+. RAM: 2G bytes Classification: 17.11, 17.16, 17.20. External routines: GNU Scientific Library (GSL), HDF5 (Fortran and C++ enabled), Numpy Nature of problem: Relativistic heavy-ion collisions are tiny in size (V approximate to 10(-42) m(3)) and live in a flash (similar to 5 x 10(-23) s). It is impossible to use external probes to study the properties of the quark-gluon plasma (QGP), a novel state of matter created during the collisions. Experiments can only measure the momentum information of stable hadrons, who are the remnants of the collisions. In order to extract the thermal and transport properties of the QGP one needs to rely on Monte-Carlo event-by-event model simulations, which reverse-engineer the experimental measurements to the early time dynamics of the relativistic heavy-ion collisions. Solution method: Relativistic heavy-ion collisions contain multiple stages of evolution. The physics that governs each stage is implemented into individual code components. A general driver script glues all the modular packages as a whole to perform large-scale Monte-Carlo simulations. The final results are stored into SQLite database, which supports standard querying for massive data analysis. By tuning transport coefficients of the QGP as free parameters, e.g. the specific shear viscosity eta/s, we can constrain various transport properties of the QGP through model-data comparisons. Additional comments: !!!!! The distribution file for this program is over 260 Mbytes and therefore is not delivered directly when download or Email is requested. Instead a html file giving details of how the program can be obtained is sent. !!!!! Running time: The following running time is tested on a laptop computer with a 2.4 GHz Intel Core i5 CPU, 4 GB memory. All the C++ and Fortran codes are compiled with the GNU Compiler Collection (GCC) 4.9.2 and -03 optimization (Table 1). (C) 2015 Elsevier B.V. All rights reserved.U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-SC0004286, DE-FG02-05ER41367, DE-SC0004104]; Natural Sciences and Engineering Research Council of CanadaSCI(E)[email protected]; [email protected]
Using channel hopping to increase 802.11 resilience to jamming attacks
No full textAbstract—802.11a, b, and g standards were designed for deployment in cooperative environments, and hence do not include mechanisms to protect from jamming attacks. In this paper, we explore how to protect 802.11 networks from jamming attacks by having the legitimate transmission hop among channels to hide the transmission from the jammer. Using a combination of mathematical analysis and prototype experimentation in an 802.11a environment, we explore how much throughput can be maintained in comparison to the maintainable throughput in a cooperative, jam-free environment. Our experimental and analytical results show that in today’s conventional 802.11a networks, we can achieve up to 60 % of the original throughput. Our mathematical analysis allows us to extrapolate the throughput that can be maintained when the constraint on the number of orthogonal channels used for both legitimate communication and for jamming is relaxed. I
Optogenetic control of developmental signaling pathways
No full textHow a complex multicellular organism forms from a single cell is a question that defies simplistic understanding. Yet, embryonic developmental programs use a surprisingly small set of signaling pathways to pattern the embryonic tissue into germ layers from which the various tissues and organs emerge. A hallmark of embryonic development is that these recurring developmental signaling pathways are carefully orchestrated in space and time to facilitate proper development. Understanding the spatiotemporal intricacies of these pathways necessitates tools which enable their perturbation in precisely defined spatiotemporal patterns. Optogenetics uses light-induced conformational changes to enable or disable protein-protein interactions, thereby permitting control of signal transduction at the flip of a switch. Consequently, light is emerging as a powerful tool to study embryonic development owing to its rapid, reversible and residue-free application, which empowers the researcher with excellent spatial and temporal control of signaling. Here, I first review recent accomplishments in optical microscopy and optogenetics which highlight the dual roles of light in visualizing as well as perturbing cellular microenvironments and processes. Second, I present an optogenetic approach to control the mitogen-activated protein kinase (MAPK) pathway which we successfully applied in both neuroblasts and frog embryos. Third, I demonstrate an optogenetic approach to control the Wnt signaling pathway in mammalian cells and frog embryos. Finally, I propose and provide working proof for a generalizable optogenetic platform to control those developmental signaling pathways, the activities of which involve the homo-association of plasma membrane-localized receptor tyrosine kinases.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-12-01The student, Vishnu Vardhan Krishnamurthy, accepted the attached license on 2019-11-27 at 10:27.The student, Vishnu Vardhan Krishnamurthy, submitted this Dissertation for approval on 2019-11-27 at 10:29.This Dissertation was approved for publication on 2019-12-04 at 10:19.DSpace SAF Submission Ingestion Package generated from Vireo submission #14554 on 2020-02-28 at 17:36:14Made available in DSpace on 2020-03-02T22:38:43Z (GMT). No. of bitstreams: 3
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Previous issue date: 2019-12-04Embargo set by: Seth Robbins for item 113989
Lift date: 2022-03-02T22:39:04Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 113989 on 2022-03-03T10:15:19Z
Spectra and Elliptic Flow of (Multi)Strange Hadrons at RHIC and LHC within Viscous Hydrodynamics + Hadron Cascade Hybrid Model
No full textUsing the (2+1)-dimensional ultrarelativistic viscous hydrodynamics + hadron cascade, VISHNU, hybrid model, we study the pT-spectra and elliptic flow of Λ, Ξ, and Ω in Au + Au collisions at sNN = 200 GeV and in Pb + Pb collisions at sNN = 2.76 TeV. Comparing our model results with the data measurements, we find that the VISHNU model gives good descriptions of the measurements of these strange and multistrange hadrons at several centrality classes at RHIC and LHC. Mass ordering of elliptic flow v2 among π, K, p, Λ, Ξ, and Ω are further investigated and discussed at the two collision systems. We find that, at both RHIC and LHC, v2 mass ordering among π, K, p, and Ω is fairly reproduced within the VISHNU hybrid model, and more improvements are needed to be implemented for well describing v2 mass ordering among p, Λ, and Ξ
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