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1. Optical constants of polycrystalline Al0.25Ga0.75P and Al0.9Ga0.1As determined by variable-angle spectroscopic ellipsometry.

Author

Quispe, D., Eng, B., Kim, M., Onno, A. L., Coppa, B. J., Yu, Z. J., Lee, M. L., and Holman, Z. C.

Subjects
*OPTICAL constants, *ELLIPSOMETRY, *DOPING agents (Chemistry), *REFRACTIVE index, *POLYCRYSTALLINE silicon
Abstract

The optical constants of single-crystal AlxGa1−xP and AlxGa1−xAs have been widely studied at various Al compositions but have not yet been thoroughly investigated as polycrystalline materials. Using variable-angle spectroscopic ellipsometry, we estimate and analyze the optical constants of polycrystalline Al0.25Ga0.75P and Al0.9Ga0.1As that were non-epitaxially deposited at deposition temperatures of either 250 or 420 °C, and with various dopant species, dopant concentrations, and V/III flux ratios. For wavelengths of 350–400 nm, decreasing the V/III ratio increases the refractive index of Be-doped polycrystalline Al0.25Ga0.75P. For wavelengths >500 nm, as the targeted Be dopant concentration increases for polycrystalline Al0.25Ga0.75P, the amount the extinction coefficient increases and the indirect bandgap decreases depends on the V/III ratio. Furthermore, Si-doped polycrystalline Al0.25Ga0.75P has significantly smaller extinction coefficient values than when it is Be-doped, for the same V/III ratio and targeted doping concentration, at wavelengths >500 nm. Based on our findings, we hypothesize that the dopant species, dopant concentration, and the V/III ratio dictate various types of defect concentrations, which then affect the optical constants and indirect bandgap of polycrystalline Al0.25Ga0.75P. Additionally, for wavelengths >500 nm, we find that polycrystalline Al0.25Ga0.75P and Al0.9Ga0.1As have the lowest extinction coefficient values when deposited at 420 °C, as opposed to 250 °C. Thus, we hypothesize that the deposition temperature is the most significant factor in dictating the optical constants of these polycrystalline III-Vs. Ultimately, this work demonstrates alternative methods to tune the optical constants of polycrystalline Al0.25Ga0.75P and Al0.9Ga0.1As, as opposed to tuning the Al composition. [ABSTRACT FROM AUTHOR]

Published
2023
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2. The CLAS12 high threshold Cherenkov counter

Author

Sharabian, Y.G., Burkert, V.D., Biselli, A., Badui, R., Christo, S., Cuevas, C., Dong, H., Danagoulian, S., Ellis, A., Elouadrhiri, L., Eng, B., Hafidi, K., Illari, I., Jacobs, G., Joo, J., Joo, K., Kashy, D., Kubarovsky, A.V., Kubarovsky, V.P., Maiylian, S., Markov, N., McClellan, M., McMullen, M., Miller, B., Miller-Smith, S., Nickolas, D., Niyazov, R., Paremuzyan, R., Phelps, W., Popov, V., Price, J., Puckett, A., Raydo, B., Riser, D., Stoler, P., Vlassov, A., and Voskanyan, A.

Published
2020
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3. The CLAS12 Silicon Vertex Tracker

Author

Antonioli, M.A., Baltzell, N., Boyarinov, S., Bonneau, P., Christo, S., Cuevas, C., Defurne, M., Derylo, G., Elouadrhiri, L., Eng, B., Ewing, T., Gilfoyle, G., Gotra, Y., Leffel, M., Mandal, S., Marzolf, B., McMullen, M., Merkin, M., Miller, R., Raydo, B., Teachey, W., Tucker, R., Ungaro, M., Yegneswaran, A., Zana, L., and Ziegler, V.

Published
2020
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4. The CLAS12 superconducting magnets

Author

Fair, R., Baltzell, N., Bachimanchi, R., Biallas, G., Burkert, V.D., Campero-Rojas, P., Elementi, L., Elouadrhiri, L., Eng, B., Ghoshal, P.K., Hogan, J., Insley, D., Kashikhin, V., Kashy, D., Krave, S., Kumar, O., Laney, M., Legg, R., Lagerquist, V., Lester, M., Lemon, T., Lung, A., Luongo, C., Matalevich, J., Mestayer, M.D., Miller, R., Moore, W., Newton, J., Nobrega, F., Pastor, O., Philip, S., Rajput-Ghoshal, R., Rao Ganni, V., Rode, C., Sandoval, N., Spiegel, S., Tilles, D., Tremblay, K., Velev, G., Wilson, C., Wiseman, M., and Young, G.R.

Published
2020
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5. The CLAS12 Spectrometer at Jefferson Laboratory

Author

Burkert, V.D., Elouadrhiri, L., Adhikari, K.P., Adhikari, S., Amaryan, M.J., Anderson, D., Angelini, G., Antonioli, M., Atac, H., Aune, S., Avakian, H., Gayoso, C. Ayerbe, Baltzell, N., Barion, L., Battaglieri, M., Baturin, V., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biselli, A.S., Bonneau, P., Bossù, F., Boyarinov, S., Briscoe, W.J., Brooks, W.K., Bruhwel, K., Carman, D.S., Celentano, A., Charles, G., Chatagnon, P., Chetry, T., Christiaens, G., Christo, S., Ciullo, G., Clary, B.A., Cole, P.L., Contalbrigo, M., Cook, M., Crede, V., Cruz-Torres, R., Cuevas, C., D’Angelo, A., Dashyan, N., Defurne, M., Deur, A., De Vita, R., Diehl, S., Djalali, C., Dodge, G., Dupre, R., Ehrhart, M., El Fassi, L., Eng, B., Ewing, T., Fair, R., Fedotov, G., Filippi, A., Forest, T.A., Garçon, M., Gavalian, G., Ghoshal, P., Gilfoyle, G.P., Giovanetti, K., Girod, F.X., Glazier, D.I., Golovatch, E., Gothe, R.W., Gotra, Y., Griffioen, K.A., Guidal, M., Gyurjyan, V., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hauenstein, F., Hayward, T.B., Heddle, D., Hemler, P., Hen, O.A., Hicks, K., Hobart, A., Hogan, J., Holtrop, M., Ilieva, Y., Illari, I., Insley, D., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jacobs, G., Jo, H.S., Johnston, R., Joo, K., Joosten, S., Kageya, T., Kashy, D., Keith, C., Keller, D., Khachatryan, M., Khanal, A., Kim, A., Kim, C.W., Kim, W., Kubarovsky, V., Kuhn, S.E., Lanza, L., Leffel, M., Lucherini, V., Lung, A., Kabir, M.L., Leali, M., Lee, S., Lenisa, P., Livingston, K., Lowry, M., MacGregor, I.J.D., Mandjavidze, I., Marchand, D., Markov, N., Mascagna, V., McKinnon, B., McMullen, M., Mealer, C., Mestayer, M.D., Meziani, Z.E., Miller, R., Milner, R.G., Mineeva, T., Mirazita, M., Mokeev, V., Moran, P., Movsisyan, A., Camacho, C. Munoz, Naidoo, P., Nanda, S., Newton, J., Niccolai, S., Niculescu, G., Osipenko, M., Paolone, M., Pappalardo, L.L., Paremuzyan, R., Pastor, O., Pasyuk, E., Phelps, W., Pogorelko, O., Poudel, J., Price, J.W., Price, K., Procureur, S., Prok, Y., Protopopescu, D., Rajput-Ghoshal, R., Raue, B.A., Raydo, B., Ripani, M., Ritman, J., Rizzo, A., Rosner, G., Rossi, P., Rowley, J., Roy, B.J., Sabatié, F., Salgado, C., Schadmand, S., Schmidt, A., Segarra, E.P., Sergeyeva, V., Sharabian, Y.G., Shrestha, U., Skorodumina, Iu., Smith, G.D., Smith, L.C., Sokhan, D., Soto, O., N.Sparveris, Stepanyan, S., Stoler, P., Strauch, S., Tan, J.A., Taylor, M., Tilles, D., Turisini, M., Tyler, N., Ungaro, M., Venturelli, L., Voskanyan, H., Voutier, E., Watts, D., Wei, X., Weinstein, L.B., Wiggins, C., Wiseman, M., Wood, M.H., Yegneswaran, A., Young, G., Zachariou, N., Zarecky, M., Zhang, J., Zhao, Z.W., and Ziegler, V.

Published
2020
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6. The CLAS12 Low Threshold Cherenkov detector

Author

Ungaro, M., Anderson, D., Asryan, G., Antonioli, M.A., Bonneau, P., Burkert, V.D., Christo, S., Cook, M., Duran, B., Eng, B., Hoebel, A., Insley, D., Jacobs, J., Joosten, S., Leffel, M., Lemon, T., McMullen, M., Meziani, Z.E., Miller, R., Rojas, P.B., Sharabian, Y.G., and Yegneswaran, A.

Published
2020
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9. Initial results of recent HIV infection surveillance in Cambodia, 2020

Author

Ly, P.S., Soch, K., Ouk, V., Ngauv, B., Chea, C., Mom, C., Bora, C., Eng, B., Ly, V., Albalak, R., Yang, C., Ebrahim, S., Dobbs, T., Ernst, A., Welty, S., Stephens, S., Buback, L., Kiernan, B., and Suthar, A.

Subjects
Disease transmission -- Statistics -- Risk factors, HIV infection -- Statistics -- Risk factors, Health
Abstract

Background: Recent HIV infection surveillance can help to identify populations and geographies with active transmission. We compared risk factors among recent and long-term infections from the initial ten months of [...]

Published
2021
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21. Implementation of the ASTER Science Standard Data Product Requirements in the EOSDIS System

Author

Schwartz, A. A, Leff, C, Geller, G, Pniel, N, Murray, A. T, and Eng, B. T

Abstract

The Advanced Spaceborne Thermal Emmission and Reflection Radiometer (ASTER) is designed to provide a high-resolution map of the Earth in both visible, near-infrared, and thermal spectral regions of the electromagnetic spectrum. The ASTER Science Team has developed standard data product algorithms to permit the estimation of surface radiances and reflectance values, to calculate surface temperatures both over water and land, to provide a color enhanced product with a high degree of surface discriminability, in addition to other functions. The ASTER Product Generation System (PGS) Team is implementing these requirements within the constraints of the EOSDIS system, using a rapid development methodology that emphasizes open lines of communication in a team approach using concurrent engineering techniques. This paper describes the critical elements in the development and integration of the ASTER PGS system.

Published
1996

22. Implementation of a Very Large Atmospheric Correction Lookup Table for ASTER Using a Relational Database Management System

Author

Thome, K, Eng, B, and Murray, A

Abstract

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)is designed to provide a high resolution map of the Earth in both visible, near-infrared, and thermal spectral regions of the electromagnetic spectrum. The ASTER Science Team has developed several standard data product algorithms, but the most complex aod computing-intensive of these is the estimation of surface radiance and reflectance values, which is done by modeling and correcting for the effects of the atmosphere. The algorithm for atmospheric correction in the visible bands sensed by ASTER calls for use of a very large Atmospheric Correction Look Up Table (ACLUT).

Published
1996

25. Spin–orbital angular momentum coupling in Bose–Einstein condensate and its spin dynamics

Author

Eng Boon Ng and C.H. Raymond Ooi

Subjects
Bose–Einstein condensates, Artificial gauge field, Physics, QC1-999
Abstract

We examine the use of Laguerre–Gaussian (LG) laser beams in the tripod scheme to create the coupling between spin and orbital angular momentum in a Bose–Einstein condensate (BEC) confined by a harmonic trap. We derive and solve the Gross–Pitaevskii equation numerically to obtain the density distribution of the BEC. Orbital angular momentum from the LG beam is transferred to the BEC, inducing the formation of a giant vortex at the BEC’s centre. The macroscopic flow of spinor BEC around the vortex leads to a persistent spin current in the BEC.

Published
2023
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28. Airborne Visible/Infrared Imaging Spectrometer (AVIRIS): Recent Improvements to the Sensor

Author

Eng, B. T, Eastwood, M. L, Chovit, C, Sarture, C. M, Green, R. O, and Chrien, T. G

Abstract

From the Introduction: AVIRIS is a NASA-sponsored Earth-looking imaging spectrometer designed, built and operated by the Jet Propulsion Laboratory. Improvements to AVIRIS prior to 1992 have been described previously. In this paper we describe recent and planned improvements to AVIRIS in the sensor task.

Published
1993

31. Airborne Visible/Infrared Imaging Spectrometer (AVIRIS): Recent Improvements to the Sensor and Data Facility

Author

Novack, H. I, Eastwood, M. L, Murray, A. T, Chovit, C, Eng, B. T, Sarture, C. M, Nielsen, P. J, Chrien, T. G, and Green, R. O

Abstract

AVIRIS operations at the Jet Propulsion Laboratory consist primarily of a sensor task and a data facility task. The sensor task is responsible for AVIRIS sensor meaintenance, laboratory calibration, and field operations. The AVIRIS data facility is responsible for data archiving, data calibration, quality monitoring and distribution. In this paper we describe recent improvements in these two primary AVIRIS tasks.

Published
1993

33. One-dimensional diffusion of colloids in polymer solutions.

Author

Chou, C.-Y., Eng, B. C., and Robert, M.

Subjects
*COLLOIDS, *POLYMER solutions, *ONE-dimensional flow, *DIFFUSION, *VIDEO microscopy, *DIGITAL image processing, *IMAGE analysis
Abstract

For colloid-polymer systems confined in one-dimensional channels, the diffusion of the colloidal particles is obtained by tracking individual particles using enhanced video microscopy and digital image analysis. For short times, the diffusion is normal, of the Fickian type, with mean-squared displacement varying linearly with time. For long times, however, the mean-squared displacement is found to increase more slowly with time, being proportional to the square root of time, in agreement with the theoretical prediction for diffusion of hard rods in one dimension in which mutual crossing of the particles cannot take place. The crossover from short-time to long-time diffusion is observed and is found to depend on the colloid and polymer concentrations. Unexpectedly, for small polymer-to-colloid size ratios, it is the polymer rather than the colloid concentration which has a leading effect on the colloid diffusion. [ABSTRACT FROM AUTHOR]

Published
2006
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34. List of Contributors

Author

Aceves, Seema S., Adcock, Ian M., Akdis, Cezmi A., Akdis, Mübeccel, Akuthota, Praveen, Allnutt, Katherine J., Apter, Andrea J., Bacharier, Leonard B., Bachert, Claus, Baines, Katherine J., Ballow, Mark, Bankova, Lora, Barnes, Peter J., Barney, Neal P., Baroody, Fuad M., Barrett, Nora, Baumert, Joseph L., Bender, Bruce G., Berin, M. Cecilia, Myers, Jocelyn M. Biagini, Blake, Kathryn V., Bochner, Bruce S., Boguniewicz, Mark, Borish, Larry, Boulet, Louis-Philippe, Bousquet, Jean, Boyce, Joshua A., Bradding, Peter, Brannan, John D., Bridgewater, Jennifer L., Brightling, Christopher E., Broide, David H., Buckley, Rebecca H., Bunyavanich, Supinda, Burks, A. Wesley, Bush, Robert K., Busse, William W., Camargo, Carlos A., Jr., Camiolo, Matthew, Canning, Brendan J., Casale, Thomas B., Castro, Mario, Chambers, Christina, Chinen, Javier, Chinn, Ivan, Chiriac, Anca Mirela, Christiansen, Sandra C., Chung, K. Fan, Cockcroft, Donald W., Cohain, Ariella T., Cohn, Lauren, Commins, Scott P., Corren, Jonathan, Cousins, David J., Custovic, Adnan, Davies, Janet M., Demoly, Pascal, Diepgen, Thomas L., Doherty, Taylor A., Dolovich, Myrna B., Eng, B, Eng, P, Douglass, Jo A., Dreskin, Stephen C., Durrani, Sandy R., Dykewicz, Mark S., Eccles, Ronald, Edwards, Alan M., Eiwegger, Thomas, Engel, Pablo, Engler, Renata J.M., Fajt, Merritt L., Fain, Sean B., Fontana, Joseph R., Frank, Michael M., Frew, Anthony J., Fricker, Michael, Garn, Holger, Gauthier, Marc, George, Maureen, Gevaert, Philippe, Gibson, Peter G., Godbout, Krystelle, Golden, David B.K., Grumach, Anete S., Guilbert, Theresa W., Gunawardana, Natasha, Gupta, Sudhir, Hallstrand, Teal S., Hamilton, Robert G., Hammad, Hamida, Hernandez, Michelle L., Khurana Hershey, Gurjit K., Hester, C. Garren, Hew, Mark, Hirota, Jeremy, Holgate, Stephen T., Holloway, John W., Irvin, Charles G., Irwin, Richard S., Jackson, Daniel J., Janssen, William J., Jelinek, Diane F., Jones, Stacie M., Kaminsky, David A., Kelly, Margaret M., Kelso, John M., Khoury, Paneez, Kita, Hirohito, Klion, Amy D., Knight, Darryl, Kowalski, Marek L., Koziol-White, Cynthia J., Lack, Gideon, Laidlaw, Tanya M., Lambrecht, Bart N., Langford, Carol A., Laube, Beth L., LeBlanc, Stephen B., Leiding, Jennifer W., Lehman, Heather K., Lemanske, Robert F., Jr., Lemière, Catherine, Leung, Donald Y.M., Li, James T., Li, Xiu-Min, Lloyd, Clare, Luster, Andrew D., Macy, Eric, Madison, J. Mark, Mangold, Aaron R., Marsh, Rebecca A., Marshall, Gailen D., Jr., Matsui, Elizabeth, Mersha, Tesfaye B., Metcalfe, Dean D., Mikhak, Zamaneh, Mills, E.N. Clare, Nelson, Harold S., Nixon, Rosemary L., Nowak-Węgrzyn, Anna, O'Byrne, Paul M., Oettgen, Hans C., O'Hehir, Robyn E., Orange, Jordan S., Ownby, Dennis R., Page, Clive P., Panettieri, Reynold A., Jr., Park, Hae-Sim, Paul, Mary E., Peden, David B., Peebles, R. Stokes, Jr., Peters, Stephen P., Peters-Golden, Marc, Phillips, Elizabeth J., Pittelkow, Mark R., Platts-Mills, Thomas A.E., Prescott, Susan L., Rabin, Ronald L., Raissy, Hengameh H., Ray, Anuradha, Ray, Samriddha, Renz, Harald, Robinson, Clive, Rosenberg, Chen E., Rothenberg, Marc E., Rowe, Brian H., Saglani, Sejal, Sahin, Ozlem, Saini, Sarbjit S., Saito, Hirohisa, Sampson, Hugh A., Satia, Imran, Sayers, Ian, Scadding, Guy W., Schadt, Eric E., Schatz, Michael, Schauberger, Eric, Schroeder, John T., Seroogy, Christine M., Shearer, William T., Shelhamer, James H., Siberry, George K., Sicherer, Scott H., Simons, F. Estelle R., Simpson, Jodie L., Slater, Jay E., AO, Peter D. Sly, Smith, Helen E., Smith, Philip H., Sokol, Caroline L., Solensky, Roland, Sriramarao, P., Srivastava, Kamal, Steinke, John W., Stewart, Geoffrey A., Stitt, Jenny M., Stokes, Jeffrey R., Sullivan, Kathleen E., Tay, Tunn Ren, Taylor, Steve L., Thompson, Bruce, Togias, Alkis, Tovey, Euan, Tuano, Karen S., Undem, Bradley J., Vandenplas, Olivier, van Zelm, Menno C., Viswanathan, Ravi K., Weber, Richard W., Weller, Peter F., Wenzel, Sally E., Whitsett, Jeffrey A., Wood, Robert A., Yel, Leman, Zeiger, Robert S., Zhang, Nan, and Zuraw, Bruce L.

Published
2020
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38. High spatial resolution imaging of methane and other trace gases with the airborne Hyperspectral Thermal Emission Spectrometer (HyTES)

Author

Hulley, G. C., primary, Duren, R. M., additional, Hopkins, F. M., additional, Hook, S. J., additional, Vance, N., additional, Guillevic, P., additional, Johnson, W. R., additional, Eng, B. T., additional, Mihaly, J. M., additional, Jovanovic, V. M., additional, Chazanoff, S. L., additional, Staniszewski, Z. K., additional, Kuai, Le, additional, Worden, John, additional, Frankenberg, Christian, additional, Rivera, G., additional, Aubrey, A. D., additional, Miller, C. E., additional, Malakar, N. K., additional, Sánchez Tomás, J. M., additional, and Holmes, K. T., additional

Published
2016
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39. β+-Thalassemia trait due to a novel mutation in the β-globin gene promoter: -26 (A>C) [HBB c.-76A>C]

Author

Waye, J.S. Nakamura-Garrett, L.M. Eng, B. Kanavakis, E. Traeger-Synodinos, J.

Abstract

We report the case of a woman with β+-thalassemia (β+-thal) trait, in which there were two sequence variants within the β-globin gene promoter: -54 (G>A) [HBB c.-104G>A] and -26 (A>C) [HBB c.-76A>C]. Data from other patients indicate that the -54 substitution is a non pathogenic sequence variant. Therefore, the β-thal phenotype is most likely due to the -26 mutation that is adjacent to the conserved ATAA box. © 2011 Informa Healthcare USA, Inc.

Published
2011

45. Performance of the CLAS12 Silicon Vertex Tracker modules

Author

Antonioli, M.A., primary, Boiarinov, S., additional, Bonneau, P., additional, Elouadrhiri, L., additional, Eng, B., additional, Gotra, Y., additional, Kurbatov, E., additional, Leffel, M., additional, Mandal, S., additional, McMullen, M., additional, Merkin, M., additional, Raydo, B., additional, Teachey, W., additional, Tucker, R., additional, Ungaro, M., additional, Yegneswaran, A., additional, and Ziegler, V., additional

Published
2013
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46. Chapter Eleven Fine sediment dynamics in the mangrove-fringed, muddy coastal zone

Author

Eng B. Lim, Eric Wolanski, and Simon Spagnol

Subjects
Hydrology, geography, Oceanography, geography.geographical_feature_category, Brackish water, Settling, River mouth, Sediment, Estuary, Plankton, Geology, Marine snow, Plume
Abstract

[Extract] Studies of the fate of fine sediment at the mouth of muddy rivers have revealed that the sediment generally falls rapidly out of suspension and does not follow the brackish water in the river plume. The Amazon River plume is a well-documented example (Geyer et a1. 1991; Kineke et al 1996). This observation has been attributed to the formation in coastal waters of large flocs, also called micro-aggregates, that accelerate the settling of the fine sediment. Such flocs have also been found in the Dutch coastal zone (Eisma et a1. 1990), the North Carolina inner shelf (Wells 1989) and the Amazon shelf (Berhane et al. 1997). These floes can exceed many hundreds, sometimes thousands, of µm in diameter. Their settling velocity is thus much higher than that of the floes usual1y found in very turbid estuaries, these flocs are seldom much larger than 100 µm in diameter (Gibbs 1985; Gibbs et at 1989; Wolanski and Gibbs 1995). The formation of micro-aggregates is thus important in controlling the fate of riverine sediment The processes generating the micro-aggregates have been little studied, though it has been speculated they were biological in nature (Cloern et al. 1983; Nelsen and Trefry 1986; Monaco et al. 1990). Recently Zimmerman and Kausch (1996) and Ayukai and Wolanski (1997) documented the planktonic origin of these micro-aggregates in respectively the Elbe River estuary and the Fly River plume in Torres Strait, Australia. These micro-aggregates essentially formed a mud-affected “marine snow “. The marine snow was previously documented only for the open ocean where there was negligible sediment in suspension (Alldredge and Silver 1988; Alldredge et al. 1993), In the Fly River, plume microphotographs of the undisturbed flocs (Ayukai and Wolanski 1997) revealed that the fine sediment particles that have escaped trapping in the estuary attach themselves to the sticky surface of the marine snow. The resulting micro-aggregates settle out of suspension near the mouth of the Fly River while the plume extends tens of kilometers further offshore. In the case of the Fly River the extremely high turbidity in the estuary prevents significant plankton growth in the estuary itself where the flocs are small (typically

Published
2002

49. Epidemiological study of workers engaged in the manufacture of chromium compounds

Author

Satoh, Kunihiro, Eng, B., Fukuda, Yasuhiko, Torii, Kazuyoshi, Eng, M., and Katsuno, Naochika

Subjects
Chemical workers -- Diseases, Occupational mortality -- Case studies, Medicine, Industrial -- Research, Epidemiological research -- Usage, Chromium compounds -- Physiological aspects, Business, Health care industry
Published
1981

50. Rotating Capacitor Measures Steady Electric Fields

Author

Johnston, A. R, Kirkham, H, and Eng, B

Subjects
Electronic Systems
Abstract

Portable sensor measures electric fields created by dc powerlines or other dc-high-voltage sources. Measures fields from 70 to 50,000 V/m with linearity of 2 percent. Sensor used at any height above ground. Measures both magnitude and direction of field and provides signals representing these measurements to remote readout device. Sensor functions with minimal disturbance of field it is measuring.

Published
1986

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