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International Conference on Cloud Computing Research and Innovation (ICCCRI)

作者： Miguel Rodel Felipe Khin Mi Mi Aung Xia Ye Wen Yonggang Technology and Research Data Storage Institute Agency for Science Singapore Data Storage Inst. Agency for Science Technology and Research Singapore SG School of Computer Engineering Nanyang Technological University Singapore

Customer Relationship Management (CRM) system improves companies' profitability by helping companies focus on the relationships with customers, colleagues or suppliers. By having strong initiative to move applications to cloud, enterprises are hindered by cloud security and reliability issues [1], especially when it comes to financial industries. To provide a practical and secure solution to these enterprises, this project aims to build a cloud CRM system that enables fully homomorphic encryption. In order to explore the potential of this, the project integrates three key components: Open source CRM system Sugar CRM, partial homomorphic database system Crypt DB and fully homomorphic encryption library HElib. By leveraging the structure based on our previous work [2], Stealthy CRM successfully integrates fully homomorphic encryption support on top of Crypt DB database encryption environment. Besides that, Stealthy CRM enables a transparent and seamless integration to any CRM system by using a modified My SQL proxy to listen to, encrypt the queries and interact with Crypt DB and HElib subsystems. An evaluation of TPC-C and TPC-H queries is conducted on Stealthy CRM system. The result shows Stealthy CRM has 14%-28% throughput overhead for most of the CRM queries, compared with unmodified My SQL server. For complex TPC-H queries involving multiplication and composition of computation, Stealthy CRM is able to execute the query between 1.75 min to 11.7 min. Although the time takes to complete a fully homomorphic query in CRM system is still long, Stealthy CRM provided a prototype for researchers and other business application developers to explore the potential.

关键词： Customer relationship management Cloud computing Encryption Elliptic curve cryptography Companies

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROscience 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Accelerator-based nuclear data measurements for nuclear science and technology 12

Accelerator-based nuclear data measurements for nuclear scie...

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12th International Topical Meeting on Nuclear Applications of Accelerators 2015, AccApp 2015

作者： Plompen, A.J.M. Chadwick, M.B. Haight, R.C. Chiaveri, E. Danon, Y. Kimura, A. Ledoux, X. Ruan, X. European Commission Joint Research Center Inst. for Reference Materials and Measurements Retieseweg 111 Geel2440 Belgium Los Alamos National Laboratory Los AlamosNM87545 United States CERN Geneva 23CH-1211 Switzerland Gaerttner LINAC Center Rensselaer Polytechnic Institute NES Bldg 1-9 TroyNY12180 United States Nuclear Data and Reactor Engineering Division Nuclear Science and Engineering Center Japanese Atomic Energy Agency Ibaraki Tokai-mura319-1195 Japan Grand Accélérateur National d'Ions Lourds Bd. Henri Becquerel BP 55027 Caen Cedex 0514076 France Chinese Nuclear Data Center China Institute of Atomic Energy P.O. Box 275 Beijing102413 China

ISBN: (纸本)9781510842205

Accelerator-development and new experimental techniques at accelerator-based neutron sources are at the heart of improvements of nuclear data for science and technology. An important driver is the new interest for safety estimates based on full uncertainty propagation as opposed to the exclusive use of safety margins based on expert judgment. Large scale modeling facilitated by the massive growth of computing power emphasize the importance of nuclear data uncertainties which are often the main contributor to performance uncertainty. Advanced reactor development with its emphasis on resource economy, minimization of high-level waste and improved safety is another important driver. Accelerator driven systems may prove essential new systems for closing the fuel cycle. Global security, emergency preparedness and safeguards change the focus towards fission and neutron- and gamma-induced yields that help forensics and detecting illegal activities The challenges for nuclear data lie in the systematic provision of uncertainties and covariances, the substantial improvement of well-known key quantities such as those addressed in the CIELO initiative (Collaborative International Evaluated Library Organisation) and addressing some of the elusive nuclear data for minor actinides which are essential in addressing the high-level waste issues. In the field of fission measurements spectacular new techniques provide a wealth of data that opening new avenues. An overview of recent developments is presented from leading facilities around the world with a short outlook of where these developments may take us. © 12th International Topical Meeting on Nuclear Applications of Accelerators 2015, AccApp 2015. All rights reserved.

关键词： Neutron sources

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A Performance Study of the Joint Viterbi Detector Decoder (JVDD) with GDLD and GDPD Codes

A Performance Study of the Joint Viterbi Detector Decoder (J...

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International Conference on Computational Intelligence and Communication Networks (CICN)

作者： Sari Shafidah Bte Shafi'ee Chan Kheong Sann Guan Yong Liang Data Storage Inst. Agency for Science Technology and Research Singapore SG Data Storage Inst. A*STAR Singapore Singapore Division of Communication Engineering Nanyang Technological University Singapore Singapore

The joint Viterbi detector/decoder (JVDD) is a recently proposed receiver scheme that does both detection and decoding on a single trellis rather than doing detection on a trellis and decoding on factor graph as in the conventional iterative detector today. The JVDD attempts to return minimum metric legal codeword (MMLC) that is the optimum decision over an AWGN/ISI channel. However in so doing, the computational complexity quickly becomes untenable. In order to manage the computational complexity, GDLD and GDPD codes have been proposed that specifically target the complexity issue of the JVDD. In this work we perform a more in-depth study on several of the codes' parameters on both the performance and the complexity of the JVDD.

关键词： Detectors Decoding Measurement Iterative decoding Viterbi algorithm Joints

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science with e-ASTROGAM: A space mission for MeV-GeV gamma-ray astrophysics

arXiv

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arXiv 2017年

作者： de Angelis, A. Tatischeff, V. Grenier, I.A. McEnery, J. Mallamaci, M. Tavani, M. Oberlack, U. Hanlon, L. Walter, R. Argan, A. von Ballmoos, P. Bulgarelli, A. Bykov, A. Hernanz, M. Kanbach, G. Kuvvetli, I. Pearce, M. Zdziarski, A. Conrad, J. Ghisellini, G. Harding, A. Isern, J. Leising, M. Longo, F. Madejski, G. Martinez, M. Mazziotta, M.N. Paredes, J.M. Pohl, M. Rando, R. Razzano, M. Aboudan, A. Ackermann, M. Addazi, A. Ajello, M. Albertus, C. Álvarez, J.M. Ambrosi, G. Antón, S. Antonelli, L.A. Babic, A. Baibussinov, B. Balbo, M. Baldini, L. Balman, S. Bambi, C. Barres de Almeida, U. Barrio, J.A. Bartels, R. Bastieri, D. Bednarek, W. Bernard, D. Bernardini, E. Bernasconi, T. Bertucci, B. Biland, A. Bissaldi, E. Boettcher, M. Bonvicini, V. Bosch-Ramon, V. Bottacini, E. Bozhilov, V. Bretz, T. Branchesi, M. Brdar, V. Bringmann, T. Brogna, A. Budtz-Jørgensen, C. Busetto, G. Buson, S. Busso, M. Caccianiga, A. Camera, S. Campana, R. Caraveo, P. Cardillo, M. Carlson, P. Celestin, S. Cermeño, M. Chen, A. Cheung, C.C. Churazov, E. Ciprini, S. Coc, A. Colafrancesco, S. Coleiro, A. Collmar, W. Coppi, P. Curado da Silva, R. Cutini, S. D'Ammando, F. de Lotto, B. de Martino, D. de Rosa, A. Del Santo, M. Delgado, L. Diehl, R. Dietrich, S. Dolgov, A.D. Domínguez, A. Dominis Prester, D. Donnarumma, I. Dorner, D. Doro, M. Dutra, M. Elsaesser, D. Fabrizio, M. Fernández-Barral, A. Fioretti, V. Foffano, L. Formato, V. Fornengo, N. Foschini, L. Franceschini, A. Franckowiak, A. Funk, S. Fuschino, F. Gaggero, D. Galanti, G. Gargano, F. Gasparrini, D. Gehrz, R. Giammaria, P. Giglietto, N. Giommi, P. Giordano, F. Giroletti, M. Ghirlanda, G. Godinovic, N. Gouiffés, C. Grove, J.E. Hamadache, C. Hartmann, D.H. Hayashida, M. Hryczuk, A. Jean, P. Johnson, T. José, J. Kaufmann, S. Khelifi, B. Kiener, J. Knödlseder, J. Kole, M. Kopp, J. Kozhuharov, V. Labanti, C. Lalkovski, S. Laurent, P. Limousin, O. Linares, M. Lindfors, E. Lindner, M. Istituto Nazionale di Fisica Nucleare Sezione di Padova PadovaI-35131 Italy INAF Osservatorio Astronomico di Padova PadovaI-35122 Italy Dipartimento di Matematica Informatica e Fisica Università di Udine UdineI-33100 Italy Laboratorio de Instrumentaçao e Particulas Instituto Superior Tecnico Lisboa Portugal CSNSM CNRS University of Paris Sud OrsayF-91405 France Laboratoire AIM CEA-IRFU CNRS Université Paris Diderot C.E.A. Saclay France NASA Goddard Space Flight Center GreenbeltMD20771 United States INAF/IAPS via del Fosso del Cavaliere 100 RomaI-00133 Italy University of Roma "Tor Vergata" RomaI-00133 Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma "Tor Vergata" RomaI-00133 Italy Institute of Physics and PRISMA Excellence Cluster Johannes Gutenberg University Mainz Mainz55099 Germany School of Physics University College Dublin Ireland University of Geneva Switzerland INAF Headquarters Viale del Parco Mellini 84 RomaI-00136 Italy IRAP Toulouse 9 av. du Colonel-Roche - BP 44 346 Toulouse Cedex 4F-31028 France INAF/OAS-Bologna Via Gobetti 93 BolognaI-40129 Italy Ioffe Institute St.Petersburg194021 Russia 08193 Spain Max-Planck-Institut fur Extraterrestrische Physik Postfach 1312 Garching85741 Germany DTU Space National Space Institute Technical University of Denmark Kgs. Lyngby Denmark Stockholm10691 Sweden Nicolaus Copernicus Astronomical Center Polish Academy of Sciences Bartycka 18 WarszawaPL-00-716 Poland Oskar Klein Centre for Cosmoparticle Physics Fysikum Stockholm University AlbaNova University Centre StockholmSE-10961 Sweden INAF - Osservatorio Astronomico di Brera MerateI-23807 Italy Campus UAB Carrer Can Magrans s/n Cerdanyola del Valles BarcelonaE-08193 Spain Department of Physics and Astronomy Clemson University ClemsonSC29634 United States Dipartimento di Fisica Università di Trieste TriesteI-34127 Italy Istituto Nazionale di Fisica Nucleare Sezione di Trieste TriesteI-34127 Italy W.

e-ASTROGAM ('enhanced ASTROGAM') is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV - the lower energy limit can be pushed to energies as low as 150 keV for the tracker, and to 30 keV for calorimetric detection. The mission is based on an advanced space-proven detector technology, with unprecedented sensitivity, angular and energy resolution, combined with polarimetric capability. Thanks to its performance in the MeV-GeV domain, substantially improving its predecessors, e-ASTROGAM will open a new window on the non-thermal Universe, making pioneering observations of the most powerful Galactic and extragalactic sources, elucidating the nature of their relativistic outflows and their effects on the surroundings. With a line sensitivity in the MeV energy range one to two orders of magnitude better than previous generation inst.uments, e-ASTROGAM will determine the origin of key isotopes fundamental for the understanding of supernova explosion and the chemical evolution of our Galaxy. The mission will provide unique data of significant interest to a broad astronomical community, complementary to powerful observatories such as LIGO-Virgo-GEO600-KAGRA, SKA, ALMA, E-ELT, TMT, LSST, JWST, Athena, CTA, IceCube, KM3NeT, and LISA. Copyright © 2017, The Authors. All rights reserved.

关键词： Germanium alloys

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Overview of the JEM-EUSO inst.uments

Overview of the JEM-EUSO instruments

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32nd International Cosmic Ray Conference, ICRC 2011

作者： Kajino, F. Picozza, P. Ebisuzaki, T. Mase, H. Tsuno, K. Takizawa, Y. Kawasaki, Y. Shinozaki, K. Ohmori, H. Wada, S. Inoue, N. Sakaki, N. Adams, J. Christl, M. Young, R. Ferguson, C. Bonamente, M. Santangelo, A. Teshima, M. Parizot, E. Gorodetzky, P. Catalano, O. Casolino, M. Bertaina, M. Panasyuk, M. Khrenov, B.A. Park, I.H. Neronov, A. Medina-Anco, G. Rodriguez-Frias, D. Szabelski, J. Bobik, P. Tsenov, R. Department of Physics Konan University Okamoto 8-9-1 Higashinada Kobe 658-8501 Japan RIKEN Advanced Science Institute 2-1 Hirosawa Wako 351-0198 Japan Graduate School of Science and Engineering 255 Shimo-Okubo Sakura-ku Saitama City Saitama 338-8570 Japan Department of Physics and Mathematics Aoyama Gakuin University 5-10-1 Fuchinobe Chuo-ku Sagamihara-shi Kanagawa 252-5258 Japan NASA Marshall Space Flight Center Huntsville AL 35812 United States Department of Physics University of Alabama Huntsville AL 35899 United States Astronomie und Astrophysik Universitt Tubingen Sand 1 72076 Tubingen Germany Institute of Cosmic Ray Research University Tokyo Kashinoha 5-1-5 Kashiwa Chiba 277-8582 Japan APC Univ. of Paris Diderot 75205 Paris Cedex 13 France Istituto di Astrofisica Spaziale E Fisica Cosmica di Palermo INAF Via Ugo La Malfa 153 90146 Palermo Italy Department of Physics University of Rome Tor Vergata Via della Ricerca Scientifica 1 00133 Rome Italy Dipartimento di Fisica Generale Università di Torino Via Giuria 1 10125 Torino Italy SINP Lomonosov Moscow State Univ. Leninskie Gory 1 str. 2 Moscow 119991 Russia Department of Physics Ewha Womans University Seoul 120-750 Korea Republic of Data Centre for Astrophysics ISDC Chemin d'Ecogia 16 CH-1290 Versoix Switzerland Inst. de Ciencias Nucleares UNAM AP 70-543 CP 04510 Mexico D.F. Mexico Soltan Institute for Nuclear Studies Box 447 90-950 Lodz Poland University of Alcala Ctra. Madrid-Barcelona Alcala de Henares E-28871 Madrid Spain Institute of Experimental Physics SAS Watsonova 47 040 01 Kosice Slovakia St. Kliment Ohridski University of Sofia 5 James Bourchier Boul. Sofia 1164 Bulgaria

JEM-EUSO mission with a large and wide-angle telescope to be mounted on the International Space Station has been planned to open up "particle astronomy" through the investigation of extreme-energy cosmic rays by detecting fluorescent and Cherenkov photons generated by air showers in the earth's atmosphere. The JEM-EUSO telescope consists of 3 light-weight optical Fresnel lenses with a diameter of about 2.5m, 300k channels of MAPMTs, frontend readout electronics, trigger electronics, and system electronics. An infrared camera and a LIDAR system will be also used to monitor the earth's atmosphere.

关键词： Cosmic rays

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Computational optimization of the run-up performance of a HDD spindle motor

Computational optimization of the run-up performance of a HD...

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2005 IEEE International Conference on Electric Machines and Drives

作者： Phyu, Hla Nu Jabbar, M.A. Liu, Z.J. Inst. of High Performance Computing Science Park II 1 Sci. Pk. Rd. #01-01 The Capricorn Singapore 117528 Singapore Dept. Electrical and Computer Engineering National University of Singapore 10 Kent Ridge Crescent Singapore 119260 Singapore Data Storage Institute DSI Building NUS 5 Eng. Dr. 1 Kent Ridge Crescent Singapore 117608 Singapore

ISBN: (纸本)0780389875

A numerical model has been developed to analyze and optimize the run-time performance of a disk drive spindle motor. A field-circuit coupled time-stepping finite element method is used for the analysis of the motor optimal performances with limits of supply voltage, current and power consumption during the spin-up time of the drive. Results of investigations with one and two disks are presented. ©2005 IEEE.

关键词： Electric motors

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Lossless data compression for infrared hyperspectral sounders - An overview

Lossless data compression for infrared hyperspectral sounder...

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Combined Preprints: 84th American Meteorological Society (AMS) Annual Meeting

作者： Huang, Bormin Huang, Hung-Lung Ahuja, Alok Chen, Hao Schmit, Timothy J. Heymann, Roger W. Coop. Inst. Meteorol. Satellite S. Space Science and Engineering Center University of Wisconsin-Madison Madison WI 53706 United States NOAA Natl. Environ. Satellite Data/I.S. Office of Research and Applications Madison WI 53706 United States Office of Systems Development Suitland MD 20746 United States CIMSS University of Wisconsin Madison

Hyperspectral sounding data requires accuracy for useful retrieval of atmospheric temperature, moisture, trace gases, clouds, aerosols and surface properties. Therefore, compression of hyperspectral sounding data is better to be lossless or near lossless. Given the large volume of three-dimensional hyperspectral data that will be generated by the hyperspectral sounders such as AIRS, CrIS, IASI, GIFTS and HES inst.uments, the use of robust data compression techniques will be beneficial to data transfer and archive. This paper reviews wavelet-based lossless data compression schemes for the 3D hyperspectral data using 3D integer wavelet transforms followed by 3D EZW and 3D SPIHT zerotree coding schemes. We extend both zerotree coding schemes to take on any size of satellite data, each of whose dimensions need not be divisible by 2N, where N is the layers of the wavelet decomposition being performed. The 2D wavelet-based JPEG-2000 compression scheme and some other prediction-based 2D lossless compression schemes such as CALIC and JPEG-LS are also investigated. Their compression ratios are presented.

关键词： Sounding apparatus

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Abstracts

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Environmental Management 1977年第1期1卷 67-96页

作者： Frankenfeld, John W. Schulz, Wolfgang McMurty, George J. Petersen, Gary W. May, G. A. Hering, F. S. Schwartz, J. I. Heywood, J. B. Chigier, N. A. Grohse, E. W. Walker, J. D. Colwell, R. R. Petrakis, L. Pergament, H. S. Thorpe, R. D. Schoepf, Richard W. Krzyczkowski, Roman Henneman, Suzanne S. Hudson, Charles L. Putnam, Evelyn S. Thiesen, Donna J. Parks, G. A. McCarty, Perry L. Leckie, J. O. Schrumpf, Barry J. Simonson, G. H. Paine, D. P. Lawrence, R. D. Pyott, W. T. Leh, M. Elders, W. Combs, J. Caplen, T. Harrison, F. L. Wong, K. M. Heft., R. E. Charnell, Robert L. Lehmann, Edward J. Mallon, Lawrence G. Hatfield, Cecile Adams, Gerald H. Johanning, James Talvitie, Antti Noll, Kenneth E. Miller, Terry Smiarowski, Joseph F. Willis, Cleve E. Foster, John H. Schlesinger, Benjamin Daetz, Douglas Lear, Donald U. Smith, Mona F. Hundemann, Audrey S. Crockett, Pernell W. Werner, Kirk G. Carroll, Thomas E. Maase, David L. Genco, Joseph E. Ifeadi, Christopher N. Lowman, F. G. Christensen, S. W. Van Winkle, W. Mattice, J. S. Harrison, Elizabeth A. Barker, James C. Chesness, Jerry L. Smith, Ralph E. Shaheeen, Donald G. Raney, R. Keith Borton, T. Wezernak, C. T. Raney, R. K. Sherwani, Jabbor K. Moreau, David H. Eisenberg, Norman A. Lynch, Cornelius J. Breeding, Roger J. Johnson, J. D. Foster, K. E. Mouat, D. A. Clark, R. Hyden, John William Owen, Wilfred Bayfield, Neil G. Barrow, Graham C. Stolz, Stephanie B. Wienckowski, Louis A. Brown, Betram S. Keyfitz, Nathan Wilson, W. L. Newman, Peter W. G. Bammi, Deepak Bammi, Dalip Goddard, James E. Chisholm, Tony Walsh, Cliff Brennan, Geoffrey Thompson, K. S. Richardson, R. Jensen, Clayton E. Brown, Dail W. Mirabito, John A. Cowing, Thomas G. Binghamton, Suny Siehl, George H. Albrecht, O. W. Alexander, Ariel Barde, Jean -Philippe Darby, William P. McMichael, Francis Clay Dunlap, Robert W. Muckleston, Keith W. Frankenhoff, Charles A. Giulini, Lorenzo T. Wyatt, T. Black, Peter E. Keating, William Thomas Leonard, M. E. Fisher, E. L. Brunelle, M. F. Dickinson, J. E. Pethig, Rudiger Clapham Exxon Research & Engineering Co. Linden Government Research Lab Coast Guard Washington D.C. Department of Transportation Washington D.C. Office For Remote Sensing of Earth Resources. NASA Earth Resources Survey Program Pennsylvania State University Washington D.C. Department of the Navy Washington D.C. Cambridge. Dept. of Mechanical Engineering Massachusetts Inst. of Technology USA Huntsville. School of Graduate Studies and Research Alabama Univ. USA Dept. of Microbiology. Office of Naval Research Maryland Univ. Arlington Research and Development Co. Pittsburgh AeroChem Research Labs. Inc. Princeton Dept. of the Interior Office of Library Services. Bibliographic Series (Final) Washington D.C. Interplan Corp. Santa Barbara Urban Mass Transportation Adm. Washington D.C. Naval Underwater Systems Center Newport Calif. Mercury Project. National Science Found Stanford Univ Washington D.C. Div. of Advanced Environmental Research & Tech. USA Corvallis. NASA Earth Resources Survey Program Oregon State Univ. Washington D.C. Riverside. Inst. of Geophysics and Planetary Physics National Science Foundation California Univ. Washington D.C. Livermore Lawrence Livermore Lab. California Univ. USA Atlantic Oceanographic and Meteorological Labs. National Oceanic and Atmospheric Administration Miami National Technical Information Service Springfield Miami Univ. Coral Gables School of Law National Oceanic and Atmospheric Administration Rockville National Academy of Sciences Office of Sea Grant Washington D. C. School of Law National Oceanic and Atmospheric Administration Office of Sea Grant. Rockville Norman. Dept. of Civil Engineering and Environmental Science. Urban Mass Transportation Administration Oklahoma Univ. Washington D. C. Knoxville.Dept. of Civil Engineering. Federal Highway Administration Tennessee Univ. Washington D. C. Amherst.Water Resources Research Center. Office of Water Research and Technology Massachusetts Univ. Washington D. C. Calif. Dept. of Industria

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