Academic literature on the topic 'Varuna (R. V.) (Ship)'

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Journal articles on the topic "Varuna (R. V.) (Ship)"

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Gu, Daifang, and O. M. Phillips. "On narrow V-like ship wakes." Journal of Fluid Mechanics 275 (September 25, 1994): 301–21. http://dx.doi.org/10.1017/s0022112094002375.

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This paper is concerned with the generation of short gravity waves and their radiation from the outer edge of the turbulent boundary layer and wake of a ship. They arise primarily near the ship's stern. The wave spectrum in the direction of wavenumber vector at an angle (90° – δ) to the ship's track is: \[\Phi_{\delta}(\omega) = \Psi\left(\frac{UT_d}{2l},\frac{U\sin\delta}{c_g},\frac{R}{UT_d}\right)\frac{1}{k_0R}\frac{2l\omega^2}{g^2}\gamma\left(0,\frac{\pi}{l};0,\omega \right),\] where Ψ is dimensionless and a function of three dimensionless parameters. γ is the spectrum of the oscillating motion at the boundary, U the ship speed, Td the decay timescale of the oscillating motion, 2l the lengthscale of the eddies, and R the distance away from the boundary along the wavenumber vector. Generally, Φδ has large values near δ = 0 and small values at large δ; it behaves as 1/R at distances not far from the ship, then may vary slower than 1/R at intermediate distances, and finally behaves as 1/R again at distances far from the ship. These are consistent with the pattern found in SAR images of narrow V-like ship wakes. The method developed here is also applicable to various problems of surface wave generation by turbulence in water.
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Bosser, Pierre, Olivier Bock, Cyrille Flamant, Sandrine Bony, and Sabrina Speich. "Integrated water vapour content retrievals from ship-borne GNSS receivers during EUREC<sup>4</sup>A." Earth System Science Data 13, no. 4 (April 12, 2021): 1499–517. http://dx.doi.org/10.5194/essd-13-1499-2021.

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Abstract. In the framework of the EUREC4A (Elucidating the role of clouds–circulation coupling in climate) campaign that took place in January and February 2020, integrated water vapour (IWV) contents were retrieved over the open tropical Atlantic Ocean using Global Navigation Satellite System (GNSS) data acquired from three research vessels (R/Vs): R/V Atalante, R/V Maria S. Merian and R/V Meteor. This paper describes the GNSS processing method and compares the GNSS IWV retrievals with IWV estimates from the European Centre for Medium-range Weather Forecasts (ECMWF) fifth reanalysis (ERA5), from the Moderate Resolution Imaging Spectroradiometer (MODIS) infrared products and from terrestrial GNSS stations located along the tracks of the ships. The ship-borne GNSS IWV retrievals from R/V Atalante and R/V Meteor compare well with ERA5, with small biases (−1.62 kg m−2 for R/V Atalante and +0.65 kg m−2 for R/V Meteor) and a root mean square (rms) difference of about 2.3 kg m−2. The results for the R/V Maria S. Merian are found to be of poorer quality, with an rms difference of 6 kg m−2, which is very likely due to the location of the GNSS antenna on this R/V prone to multipath effects. The comparisons with ground-based GNSS data confirm these results. The comparisons of all three R/V IWV retrievals with MODIS infrared products show large rms differences of 5–7 kg m−2, reflecting the enhanced uncertainties in these satellite products in the tropics. These ship-borne IWV retrievals are intended to be used for the description and understanding of meteorological phenomena that occurred during the campaign, east of Barbados, Guyana and northern Brazil. Both the raw GNSS measurements and the IWV estimates are available through the AERIS data centre (https://en.aeris-data.fr/, last access: 20 September 2020). The digital object identifiers (DOIs) for R/V Atalante IWV and raw datasets are https://doi.org/10.25326/71 (Bosser et al., 2020a) and https://doi.org/10.25326/74 (Bosser et al., 2020d), respectively. The DOIs for the R/V Maria S. Merian IWV and raw datasets are https://doi.org/10.25326/72 (Bosser et al., 2020b) and https://doi.org/10.25326/75 (Bosser et al., 2020e), respectively. The DOIs for the R/V Meteor IWV and raw datasets are https://doi.org/10.25326/73 (Bosser et al., 2020c) and https://doi.org/10.25326/76 (Bosser et al., 2020f), respectively.
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Murdani, Ni Ketut, and Anak Agung Elik Astari. "Pengaruh Volume Bongkar Dan Muat Barang Terhadap Volume Pendapatan Perusahaan PT. Varuna Tirta Prakasya (PERSERO) Di Pelabuhan Benoa Kabupaten Badung." Jurnal Ilmiah Satyagraha 2, no. 1 (June 8, 2020): 74–88. http://dx.doi.org/10.47532/jis.v2i1.56.

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KMP Nusa Jaya Abadi is primarily intended to connect the economic artery of Klungkung district in general and the island of Bali and small islands in Nusa Penida in particular. Since inaugurated its operation by the President of RI in 2007 until now the revenue from the port and shipping sectors served by Motor Vessel Penyebrangan Roro Nusa Jaya Abadi has reached more than 3.2 billion rupiah which consists of operational unit of loading and unloading goods and port charges.The purpose of this study is to know the analysis of loading and unloading of goods in increasing the Local Original Revenue (PAD) in the Port of Nusa Penida Distribution Klungkung regency.This research was conducted on Technical Implementation Unit of Port of Penpenangan Nusa Penida of Klungkung Regency. While the object of this research is the operational implementation of loading and unloading ship ports in an effort to increase local revenue (PAD).Data collection techniques include observation, interviews, and document recording. The method used in this research is quantitative analysis: correlation analysis, determination analysis, and t-test analysis.The results obtained from this research are: correlation analysis obtained correlation value (r) of = 0.9957, this means that the relationship between the independent variables of loading and unloading with the dependent variable Original Revenue has a correlation coefficient of 0.9957.From result of calculation of determination obtained result equal to 99,15%. This means that loading and unloading activities have an effect on increasing the original income of 99.15%, while the remaining 0.85% is the influence of other variables that are not measured in this study.While the results of t-test analysis obtained value of 10.7792 or (10.7792 6.3140), it can be said that the relationship that occurs between loading and unloading activities with the original revenue is significant (meaningful).
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Raineault, Nicole. "New Frontiers in Ocean Exploration: The E/V Nautilus, NOAA Ship Okeanos Explorer, and R/V Falkor 2019 Field Season." Oceanography 33, no. 1 (March 1, 2020): 1–122. http://dx.doi.org/10.5670/oceanog.2020.supplement.01.

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Bell, Katherine, and Nicole Raineault. "New Frontiers in Ocean Exploration: The E/V Nautilus, NOAA Ship Okeanos Explorer, and R/V Falkor 2016 Field Season." Oceanography 30, no. 1 (March 1, 2017): 1–94. http://dx.doi.org/10.5670/oceanog.2017.supplement.01.

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Raineault, Nicole. "New Frontiers in Ocean Exploration: The E/V Nautilus, NOAA Ship Okeanos Explorer, and R/V Falkor 2017 Field Season." Oceanography 31, no. 1 (March 1, 2018): 1–126. http://dx.doi.org/10.5670/oceanog.2018.supplement.01.

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CSCI, _. "CSCI Young Investigators Forum Abstracts." Clinical & Investigative Medicine 32, no. 4 (August 1, 2009): 1. http://dx.doi.org/10.25011/cim.v32i4.6623.

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ASSESSMENT OF PARALLEL SIGNALING PATHWAYS IN UTERINE MYOCYTES STIMULATED WITH VARIOUS SMOOTH MUSCLE AGONISTS H.N. Aguilar, B.F. Mitchell 1 TRACTOGRAPHY: A NOVEL TECHNIQUE TO IMAGE FIBER TRACTS OF THE SPINAL CORD Fahad Alkherayf, Eve Tsai, Arturo Cardenas-Blanco, Alain Berthiaume, Brien Benoit, John Sinclair 1 MODULATION OF OSTEOCLASTOGENESIS IN INFLAMMATORY JOINT DISEASES H. Allard-Chamard, M. Durant, A.J. de Brum-Fernandes, G. Boire, S.V. Komarova, S.J. Dixon, S.M. Sims, R. Harison, M.F. Manolson 2 “THE RIGHT THING TO DO? A CRITICAL ANALYSIS OF PUBLIC HEALTH ETHICS, RIGHTS DISCOURSE, AND THE EXPANSION OF ANTIRETROVIRAL THERAPY (ART)” Berkhout, SG, Anderson, S, Tyndall, MW 2 COST-EFFECTIVENESS OF IMMEDIATE BASELINE COMPUTED TOMOGRAPHY VS. MAGNETIC RESONANCE IMAGING OF ACUTE ISCHEMIC STROKE IN ONTARIO PATIENTS WHO PRESENT WITH SYMPTOMS SUGGESTIVE OF STROKE KR Burton, G. Mery 3 CHITOSAN-MEDIATED FGF18 DELIVERY FOR ASSISTED BONE REPAIR A. Carli, M. Lavertu, C. Gao, A. Merzouki, M.D. Buschmann, J.E. Henderson, E.J.Harvey 3 ACTIVE PI3K-AKT SIGNALING PROMOTES THE METASTATIC POTENTIAL OF ASCITES-DERIVED EPITHELIAL OVARIAN CANCER CELLS Correa RJM, Ramos-Valdes Y, Bertrand M, Lanvin D, Préfontaine M, Sugimoto AK, Lewis JD, Shepherd TG, DiMattia GE 4 MECHANISMS OF K65R, D67N, K103N, V106M AND M184V RESISTANCE DEVELOPMENT IN SUBTYPE-B AND C HIV-1 Dimitrios Coutsinos, Cedric F. Invernizzi, Daniela Moisi, Maureen Oliveira, Hongtao Xu, Bluma G. Brenner, Mark A. Wainberg 4 A MODEL TO DETERMINE FACTORS INVOLVED IN THE INDUCTION OF AN IN VIVO CTL RESPONSE Dissanayake D, Ohashi PS 5 P63 ANTAGONIZES P53 TO PROMOTE THE SURVIVAL OF EMBRYONIC NEURAL PRECURSOR CELLS Sagar B. Dugani, Annie Paquin, Masashi Fujitani, David R. Kaplan, Freda D. Miller 5 SPINAL LOCOMOTOR NETWORK MODULATION BY ENDOGENOUS SEROTONIN IN THE ISOLATED NEONATAL MOUSE SPINAL CORD Dunbar MJ, Whelan PJ 6 THE TUMOR PROMOTING AND REPRESSING EFFECTS OF INTEGRIN-LINKED KINASE ARE DIFFERENTIATED BY JNK1 IN HUMAN CANCER CELLS Adam David Durbin, Gregory Edward Hannigan, David Malkin 6 INCREASED EXCITATION IN MICE OVER-EXPRESSING NEUROLIGIN-1 IS ASSOCIATED WITH IMPAIRED LONG-TERM POTENTIATION AND LEARNING AND MEMORY Brennan D Eadie, Timal Kannangara, Regina Dalhaus, Rochelle M Hines, Yu-Tian Wang, Alaa El-Husseini, Brian R Christie 7 A NOVEL ROLE FOR CDK5/P35 IN MEDULLOBLASTOMA FORMATION Friesen AN, Shin J, Law V, Lee YS, Mckinnon P, Lee KY 7 ALTERED PSYCHOSOCIAL BEHAVIOUR AND STRESS RESPONSE FOLLOWING ‘MINOR’ STROKE IN THE RAT Krista Hewlett, Meighan Kelly, Dale Corbett 8 TUMOUR PATHOLOGY PREDICTS MICROSATELLITE INSTABILITY IN COLORECTAL CANCER AJ Hyde, D Fontaine, S Stuckless, RC Green, A Pollett, M Simms, P Parfrey, HB Younghusband 8 PROTEINASE-ACTIVATED RECEPTOR-2 (PAR2) IS A POTENTIAL TARGET FOR THE ANTI-INFLAMMATORY EFFECTS OF INSULIN Eric Hyun, Rithwick Ramachandran, Nicolas Cenac, Steeve Houle, Amit Saxena, Roland S. Liblau, Morley Hollenberg, Nathalie Vergnolle 9 CHEMOSENSITIVE PROPERTIES OF THE VENTRAL MEDULLA IN VITRO Kalf Daniel J, Wilson Richard JA 9 NOVEL DOPAMINE RECEPTOR-N TYPE CALCIUM CHANNEL INTERACTIONS: POTENTIAL THERAPEUTIC TARGETS FOR DISORDERS ASSOCIATED WITH ABERRANT DOPAMINERGIC SIGNALLING Alexandra E. Kisilevsky, Sean J. Mulligan, Christophe Altier, Mircea C. Iftinca, Diego Varela, Chao Tai, Lina Chen, Shahid Hameed, Jawed Hamid, Brian A. MacVicar, Gerald W. Zamponi 10 TRUNCATION OF THE C-TERMINAL DOMAIN OF CONNEXIN43 INCREASES INFARCT VOLUME DURING STROKE Kozoriz MG, Bechberger JF, Bechberger GR, Suen MWH, Moreno AP, Maass K, Willecke K, Naus CC 10 EVALUATION OF THE DELIVERABILITY AND TOLERABILITY OF INTENSIVE WEEKLY DOUBLET ADJUVANT CHEMOTHERAPY IN NON SMALL CELL LUNG CANCER M. Sara Kuruvilla, Lorraine Martelli-Reid, J. R. Goffin, A. Arnold, Peter M. Ellis 11 A POLICY-ORIENTED SYSTEMATIC REVIEW OF THE SAFETY AND EFFICACY OF ENDOSCOPIC THERAPIES FOR THE TREATMENT OF BARRETT’S ESOPHAGUS Lau D, Menon D, Stafinski T, Topfer LA, Walker J 11 THE SRC-LIKE ADAPTOR PROTEIN, SLAP, PLAYS A ROLE IN MONOCYTE-DERIVED DENDRITIC CELL MATURATION Larissa Liontos, L Dragone, A Weiss, C J McGlade 12 SWEET PEE: A NEW MOUSE MODEL FOR GLOMERULOCYSTIC KIDNEY DISEASE AND GLUCOSURIA J Ly, J Rossant, L Oxborne, C McKerlie, A Flenniken, S Quaggin 12 CARDIOGENIC SHOCK IN ASPHYXIATED NEONATE PIGLETS: IS COMBINATION INOTROPE THERAPY BETTER THAN HIGH-DOSE DOPAMINE? N. Manouchehri, P.-Y. Cheung, C. Joynt, T. Churchill, D. Bigam 13 THE RELATIONSHIP BETWEEN FLOW-MEDIATED DILATION, HYPEREMIC SHEAR STRESS, AND VARIOUS ANTHROPOMETRIC INDICES OF OBESITY Martin BJ, Title LM, Verma S, Charbonneau F, Buithieu J, Lonn EM, Anderson TJ 13 RAPID LOCALIZATION OF NEUTROPHILS TO SITES OF CELL DEATH BY MAC1-DEPENDENT ADHESION AND INTRAVASCULAR CRAWLING McDonald B, Menezes GB, Kubes P 14 THE ROLE OF SHIP-1 IN CEACAM1-MEDIATED HOST RESPONSES TO NEISSERIA GONORRHOEAE INFECTION Gordon G McSheffrey, S D Gray-Owen 14 USING VOLTAGE-SENSITIVE DYES TO RECORD BRAIN ACTIVITY IN NATURALLY MOVING MICE McVea DA, Mohajerani MH, Fingas M, Murphy TH 15 POTENTIAL MECHANICAL INFLUENCE IN MICROVASCULAR PATHOLOGY IN THE ACL DEFICIENT RABBIT KNEE Daniel Miller 15 OSTEOBLAST MECHANOSENSITIVITY: THE ROLE OF HYDROSTATIC PRESSURE Kenneth A. Myers, Timothy Douglas, Ricarda Hess, Justin Parreno, Jerome B. Rattner, Dieter Scharnweber, Nigel G. Shrive, David A. Hart 16 ENDOTHELIAL PROGENITOR CELLS FOR HEALING AND ANGIOGENESIS IN A SEGMENTAL BONE DEFECT MODEL: A COMPARISON WITH MESENCHYMAL STEM CELLS Nauth A, Li R, Schemitsch EH 16 DELAY OF DNA METHYLATION IN PERINATAL MALE GERM CELLS IN THE ABSENCE OF DNMT3L RESULTING IN INFERTILITY Kirsten Niles, Sophie La Salle, Christopher Oakes, Jacquetta Trasler 17 INVESTIGATING CRMP4 FUNCTION IN CNS NERVE REGENERATION S. Ong Tone, S. Kanagal, A. Wilson, Y.Z. Alabed, A. Di Polo, A.E. Fournier 17 A NOVEL, DNA DAMAGE-DEPENDENT REGULATORY PATHWAY FOR AKT IN VIVO Andrew J. Perrin, W. Brent Derry 18 CHOP AS A TARGET FOR PRESERVATION OF TRANSPLANTED ISLET GRAFT MASS Potter K, Dai L, Verchere CB 18 TREATMENT OF ACHILLES TENDINOPATHY R Ram, C Patel, D Wiseman, W Meeuwisse, JP Wiley 19 PLACENTAL LACTOGEN FUNCTION IN POST-IMPLANTATION MURINE PREGNANCY Saara M. Rawn, James C. Cross 19 DECODING NEURAL SIGNALS FROM MULTIELECTRODE ARRAYS IN THE PRIMATE DORSOLATERAL PREFRONTAL CORTEX Sachs A.J, Pieper F, Martinez-Trujillo J.C. 20 THE ROLE OF TRANSFORMING GROWTH FACTOR ALPHA IN A MOUSE MODEL OF OSTEOARTHRITIS Usmani S.E, Appleton C.T.G., Welch I.D, Beier F. 20 SKIN-DERIVED STEM CELLS ACT AS FUNCTIONAL SCHWANN CELLS WHEN TRANSPLANTED INTO LESIONED PERIPHERAL NERVE Sarah K. Walsh, Rajiv Midha 21 TLR4 MEDIATES SUSCEPTIBILITY TO STREPTOZOTOCIN-INDUCED DIABETES C Westwell-Roper, G Soukhatcheva, MJH Hutton, JP Dutz, CB Verchere 21 A FUSION OF GMCSF AND IL-21 (GIFT-21) POTENTLY INDUCES INFLAMMATION AND APOPTOSIS THROUGH SIGNALS DOWNSTREAM OF THE IL-21R ALPHA CHAIN Patrick Williams, Shala Yuan, Jessica Cuerquis, Elena Birman, Kathy Ann Forner, Jacques Galipeau 22
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Tomera, Mirosław. "Dynamic Positioning System for a Ship on Harbour Manoeuvring with Different Observers. Experimental Results." Polish Maritime Research 21, no. 3 (October 28, 2014): 13–24. http://dx.doi.org/10.2478/pomr-2014-0025.

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Abstract In cases when the navigational space of the manoeuvre performed by the ship is severely limited, the procedures making use of the rudder blade, propeller screw, and thrusters are very complicated. Such situations take place when the ship manoeuvres inside the harbour area and in those cases the structure of the control system is very complex. Te article describes the algorithm of multivariable control of ship motion over the water surface, which makes use of the state vector consisting of 6 variables. Tree of them, which are the position coordinates (x, y) measured by the DGPS system and the ship heading y measured by gyro-compass, were obtained experimentally. Te three remaining variables, which are the velocities in surge u, sway v, and yaw r directions, were estimated by Kalman filter, Kalman-Bucy filter and extended Kalman flter, respectively. The control algorithms making use of these observers were examined using the training ship “Blue Lady” which was navigated on the lake Silm in Ilawa/Kamionka in the Ship Handling Research and Training Centre owned by the Foundation for Safety of Navigation and Environment Protection. Te experimental results obtained using control systems with three observers were finally compared between each other.
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Bell, Robin E., and A. B. Watts. "Evaluation of the BGM-3 sea gravity meter system onboard R/V Conrad." GEOPHYSICS 51, no. 7 (July 1986): 1480–93. http://dx.doi.org/10.1190/1.1442196.

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The first Bell Aerospace BGM-3 Marine Gravity Meter System available for academic use was installed on R/V Robert D. Conrad in February, 1984. The BGM-3 system consists of a forced feedback accelerometer mounted on a gyrostabilized platform. Its sensor (requiring no cross‐coupling correction) is a significant improvement over existing beam and spring‐type sea gravimeters such as the GSS-2. A gravity survey over the Wallops Island test range together with the results of subsequent cruises allow evaluation of the precision, accuracy, and capabilities of the new system. Over the test range, the BGM-3 data were compared directly to data obtained by a GSS-2 meter onboard R/V Conrad. The rms discrepancy between free‐air gravity anomaly values at intersecting ship tracks of R/V Conrad was ±0.38 mGal for BGM-3 compared to ±1.60 mGal for the GSS-2. Moreover, BGM-3’s platform recovered from abrupt changes in ship’s heading more rapidly than did the platform of GSS-2. The principal factor limiting the accuracy of sea gravity data is navigation. Over the test range, where navigation was by Loran C and transit satellite, a two‐step filtering of the ship’s velocity and position was required to obtain an optimal Eötvös correction. A spectral analysis of 1 minute values of the Eötvös correction and the reduced free‐air gravity anomaly determined the filter characteristics. To minimize the coherence between the Eötvös and free‐air anomaly, it was necessary to prefilter the ship’s position and velocity. Using this procedure, reduced free‐air gravity anomalies with wavelengths as small as a few kilometers can be resolved.
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GOULIELMOS, ALEXANDER M., and EFTICHIA SIROPOULOU. "DETERMINING THE DURATION OF CYCLES IN THE MARKET OF SECOND-HAND TANKER SHIPS, 1976–2001: IS PREDICTION POSSIBLE?" International Journal of Bifurcation and Chaos 16, no. 07 (July 2006): 2119–27. http://dx.doi.org/10.1142/s0218127406015969.

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In this paper we have calculated the duration of cycles manifested in the prices of second-hand tanker ships, using the method of Rescale Range (R/S) Analysis. We have considered a time series of 312 monthly data, taken between the years 1976–2001, and combined R/S with a study of its V-statistic, Power Spectrum Analysis and Sharpe Ratio. Our ultimate goal is to be able to help decision-makers use this analysis in order to buy or sell a ship at the "best timing". As the sale and purchase ship market exhibits a strongly deterministic cyclical behavior with a high degree of "irregularity" (or "volatility"), we expect the techniques of Nonlinear Dynamics and Chaos Theory to be appropriate to be applied to its dynamics. We have found evidence for the existence of two cycles of tanker ship prices, of duration 4 and 8 years respectively, in the years 1976–2001, in agreement with what is expected from the theoretical analysis of freight market cycles. We have shown that our time series is not a random walk process and have used software prediction methods to demonstrate that short term forecasting of second-hand tanker prices may indeed be possible. These results are, of course, preliminary since a lot more data is needed to test their forecasting validity and hence should only be regarded as a start in this interesting area of research.
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Dissertations / Theses on the topic "Varuna (R. V.) (Ship)"

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Castro, Alejandro Miguel. "Polydispersed bubbly flow model for ship hydrodynamics with application to Athena R/V." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/4952.

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Bubbly flows around ships have been studied for years, mostly in relation with ship acoustic signatures. Bubbles are generated at the bow and shoulder breaking waves, at the hull/free surface contact line, the propeller and the highly turbulent stern flow. These bubbles are further transported downstream by the flow forming a two-phase mixture in the wake that can be kilometers long. The presence of bubbles in the wake of a ship significantly affects the acoustic response of the medium and can be detected by measuring acoustic attenuation and backscattering making a ship vulnerable to detection. Additionally, the bubbly wake shows at the surface as a characteristic signature of white water, and given the length of the bubbly wake, it makes a ship visible from satellites. Therefore, the bubbly wake can be used to detect and identify surface ships. Bubbly flows do not scale to model scale experiments, and experiments on full scale ships are scarce mostly due to difficult access areas and the high speeds involved. It is therefore of interest to simulate the bubbly flow around ships to provide information difficult, if not impossible, to obtain with experiments. This work presents the development of a code for the simulation of polydispersed bubbly flows with a focus on ship hydrodynamics. The mathematical model implemented is based on a two-fluid formulation coupled with a Boltzmann-like transport equation describing the bubbly phase. The tool developed attempts to include most of the relevant physics of the problem to represent better the conditions of real scenarios. The resulting code allows the simulation of polydispersed bubbly flows in situations including free surface and air entrainment, high void fraction levels and moving control surfaces and propulsors. The code is two-way coupled, with a strong coupling between the two phases and between the bubble sizes. The complexity of the problems tackled in this research required the development of novel numerical methods solving issues never identified before or simply neglected. These methods play an essential role in the accuracy, robustness and efficiency of the code and include: a two-phase projection method that not only couples pressure and velocity but also implicitly couples void fraction, a time splitting marching scheme to solve separately coupling in space and in bubble sizes, and a stable numerical method to integrate the strong coupling introduced by collision forces. The implemented code is applied to the simulation of the bubbly flow around a full scale ship using the latest available models and computational techniques. A study is performed on the influence of several mechanisms on the predicted bubbly wake and comparisons with available experimental data are presented. The influence of breakup in the boundary layer is analyzed in detail as well. In addition, this work identifies several modeling and implementations issues and attempts to provide a path for future studies. To illustrate the flexibility and robustness of the code, a final demonstration case is presented that includes rotating propellers. The computation is performed at full scale, with the fully appended geometry of the vessel and includes incoming waves, oceanic background and rectified diffusion models. Many of these features are unique to this computation and make it the first of its kind.
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Books on the topic "Varuna (R. V.) (Ship)"

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Pennington, Nancy J. FASINEX Frontal Air-Sea Interaction Experiment (January-June 1986): Cruise summaries for FASINEX phase two; R/V OCEANUS cruise 175, R/V ENDEAVOR cruise 141. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1986.

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Pennington, Nancy J. FASINEX Frontal Air-Sea Interaction Experiment (January-June 1986): Cruise summaries for FASINEX phase two; R/V OCEANUS cruise 175, R/V ENDEAVOR cruise 141. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1986.

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Pennington, Nancy J. FASINEX Frontal Air-Sea Interaction Experiment (January-June 1986): Summaries for FASINEX mooring cruises; phase one: R/V KNORR Cruise 119, phase three: RV/KNORR Cruise 123. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1986.

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Pennington, Nancy J. FASINEX Frontal Air-Sea Interaction Experiment (January-June 1986): Summaries for FASINEX mooring cruises; phase one: R/V KNORR Cruise 119, phase three: RV/KNORR Cruise 123. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1986.

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R/V Lake Guardian. Chicago, Ill: U.S. Environmental Protection Agency, Great Lakes National Program Office, 1993.

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United States. Environmental Protection Agency. Great Lakes National Program Office., ed. R/V Lake Guardian. Chicago, Ill: U.S. Environmental Protection Agency, Great Lakes National Program Office, 1990.

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United States. Environmental Protection Agency. Great Lakes National Program Office, ed. R/V Lake Guardian. Chicago, Ill. (77 W. Jackson Blvd., Chicago 60604): U.S. Environmental Protection Agency, Great Lakes National Program Office, 1997.

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Observatory, Lamont-Doherty Geological, ed. CTD and hydrographic data from cruise ANT V/2 of R/V Polarstern. 1989.

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Lucky Strike / Alvin expedition: R/V Atlantis II 129 legs 6, May 27-June 3, 1993. 1993.

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B, Udint͡s︡ev G., and Intergovernmental Oceanographic Commission, eds. Equatorial segment of the Mid-Atlantic Ridge: Initial results of the geological and geophysical investigations under the EQUARIDGE Program, Cruises of r/v "Akademik Nikolaj Strakhov" in 1987, 1990, 1991. Paris: Unesco, 1996.

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Book chapters on the topic "Varuna (R. V.) (Ship)"

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Braddick, Michael J. "Case of Ship-Money (R v Hampden) (1637)." In Landmark Cases in Revenue Law. Hart Publishing, 2019. http://dx.doi.org/10.5040/9781509912285.ch-001.

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"Ghosh [1982] QB 1053; 2 All ER 689 a two point test was developed. Two questions had to be asked: (1) Was what was done dishonest according to the ordinary standards of reasonable and honest people? If the answer is ‘no’ the defendant is not guilty as there is no proved dishonesty and a vital element of the actus reus is unproved. If the answer is ‘yes’ then the second question has to be asked, (2) Did the defendant realise that reasonable and honest people regard what he did as dishonest? If the answer is yes then the defendant is guilty. In our case Mary may well find that the answer to the first question would come in as ‘no’ and she escapes liability. Should it not, the second question should be answered in the negative and she still escapes liability. Most reasonable and honest people would regard the taking of the money in the precise circumstances reasonable and not dishonest. The discussion of the issue of permanent deprivation as a core aspect of the mens rea would next be discussed. However, this demonstration is to indicate the relation ship between factual and legal analysis and the way in which factual analysis facilitates legal analysis and argument construction. The standard legal problem question (which will be discussed in Chapter 8) is of course less obviously liable to give the information required for a full factual analysis. However, in terms of knowing what to look out for at the level of facts and evidence, it allows the map of potential areas to be developed. 7.12 TASK: THE CASE OF R V JACK For those of you who would like to test your skills further there is another charting task with a set of witness statements in the fictitious case of R v Jack. The law applicable is again s1(1) of the Theft Act. (1) Construct your own Wigmore chart and keylist for the defence. (2) Use your chart to determine the strengths and weaknesses of the prosecution case. (3) What further evidence would be useful for either party. (4) Write out an argument for the prosecution to prove that Jack is guilty. (5) Write out an argument for the defence to prove that Jack is guilty. There is no necessarily correct answer, and the statements are provided as an opportunity for developing your skills in the area of factual analysis and argument construction either in or out of a classroom setting. 7.12.1 Statements relating to the case of R v Jack 7.12.1.1 R v Jack Statements for Wigmore Chart Jack has been charged with theft (contrary to s1(1) of the Theft Act 1968) of a shirt from the New Style Clothes Shop on 12 September. Below, you will find witness statements. Read them carefully and construct a modified Wigmore Chart for the defence." In Legal Method and Reasoning, 260–62. Routledge-Cavendish, 2012. http://dx.doi.org/10.4324/9781843145103-203.

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"much more needs to be done before we may begin and are summed up in Book VI, with its climactic to grasp the ‘goodly golden chayne, wherewith yfere vision of the Graces’. Clearly the poem was meant to | The vertues linked are in louely wize’ (I ix 1.1–2). be read as a verse in the Bible was read in Spenser’s For example, in displaying the special powers of a day: any stanza is the centre from which to recon-virtue, each book displays also its radical limitations struct the whole. without the other virtues, and, above all, without A study of the virtues makes it increasingly clear divine grace. No book is complete in itself, for each that before ever Spenser began to write he had seen (after the first) critiques those that preceded it, so at least the outline of each virtue and had mapped that understanding what has been read constantly out their relationships. (On the formal idea of each expands and consolidates until by the end all the virtue, which his narrative unfolds and realizes, see virtues are seen in their unifying relationships. Heninger 1991:147.) Early in his career, he dedicated A general survey of all the books of The Faerie his talents to fashion the scheme of virtues in a poem Queene is offered in a number of introductions to the he could never expect to complete, no more than poem: Spens 1934, Nelson 1963, R. Freeman 1970, could Chaucer in projecting the Canterbury Tales – Heale 1987, Tonkin 1989, Meyer 1991, Waller 1994, on its unfinished state, see Rajan 1985:44–84, and and Oram 1997. Tonkin and Oram especially offer Hamilton 1990 – and he never faltered or changed. close and perceptive readings of each book. In addi-What he says about the Red Cross Knight may be tion, there are studies of individual books. Book applied to him: ‘The noble hart, that harbours ver-I: Rose 1975; II: Berger 1957; III and IV: Roche tuous thought [i.e. knowledge of the virtues], | And 1964, Silberman 1995; IV: Goldberg 1981; III, IV, is with childe of glorious great intent, | Can neuer and V: Broaddus 1995; V: Dunseath 1968, Aptekar rest, vntill it forth haue brought | Th’eternall brood 1969, Fletcher 1971; VI: A. Williams 1967, Tonkin of glorie excellent’ (I v1.1–4). As he testifies in the 1972. See also the entry on each book in The Spenser final canto of the 1596 poem: as a ship may be Encyclopedia. In addition, there are general studies delayed by storms on its way to a certain shore, of the virtues: for example, Horton 1978 finds the ‘Right so it fares with me in this long way, | Whose poem’s unity in the binary pairing of the books (see course is often stayd, yet neuer is astray’ (VI xii also his entry, ‘virtues’, in the SEnc), and M.F.N. 1.8–9). While we may speculate that Spenser wrote Dixon 1996:13 argues that Spenser offers ‘a gram-for patronage, a pension, or a position at court, we mar of virtues’, i.e. ‘an iterative series of interde-know from the opening stanza of The Faerie Queene pendent virtues’. There are also many studies of the that ‘the sacred Muse’ commanded him ‘To blazon techniques used by Spenser to structure the virtues: broade emongst her learned throng’. Clearly he had for example, the ‘resonances sounding at large no choice but to devote his life to writing that poem. throughout the poem’ examined by Lewis 1967, the The third step in relating the virtues is to recog-structural triads by A. Fowler 1973, the poem’s nize that they are fashioned in the poem through the analogical coherence by Nohrnberg 1976, its self-actions of the major characters in order to fashion reflexiveness by MacCaffrey 1976, the ‘echoing’ by readers in ‘vertuous and gentle discipline’. In the Hollander 1981, the demonic parody of the virtues Letter to Raleigh, Spenser distinguishes between his by N. Frye 1963 and Fletcher 1971, the poem’s am-‘general intention and meaning’, which is to fashion bivalence by Fletcher 1964, the structural patterns in the virtues, and his poem’s ‘generall end’, which is Books I and II by Røstvig 1994, the symmetrical to ‘fashion a gentleman or noble person in vertuous ring structure in Book III by Greenfield 1989, the and gentle discipline’ (8). Accordingly, our under-poem’s broken symmetries by Kane 1990, the use of standing of the nature of holiness, for example, is gained image-patterns in which images are repeated in bono only by reading the story of the Red Cross Knight, et in malo by Kaske 1999, the sequence of emblems and not by bringing to it anything more than a which make the poem ‘the most emblematic long general awareness that the virtue relates our life in poem in our literature’ (A. Fowler 1999:23), and this world to God. His quest traces the process of the narrative’s self-reflectiveness by Goldberg 1981. sanctification as his will cooperates with divine grace; The poem interprets and reinterprets itself endlessly, and, through him, we learn how to frame our lives in as Tonkin 1989:43 suggests in commenting on holy living. The virtues do not exist apart from the." In Spenser: The Faerie Queene, 28. Routledge, 2014. http://dx.doi.org/10.4324/9781315834696-26.

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Conference papers on the topic "Varuna (R. V.) (Ship)"

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Fu, Thomas C., Eric Terrill, Anne M. Fullerton, and Genevieve Lada Taylor. "A Comparison of the Model and Full Scale Transom Wave of the R/V Athena." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20595.

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Over the past few years the U.S. Office of Naval Research has sponsored a series of measurements of the transom wave of the R/V Athena and of a 1/8.25-scale model (NSWCCD Model 5365) of the ship. The objectives of the testing were to characterize the free surface wave behind the ship’s transom at both model and full scale for use in identifying hydrodynamic features and for developing and validating numerical simulation tools. The focus of this paper is the comparison of these full scale and model scale measurements, specifically a comparison of the time-averaged free-surface stern wave profiles and the dominant hydrodynamic features, the rooster tail for example. Both the field measurements and the model scale tow tank measurements were made in as calm as possible ambient conditions. Full scale data was collected in the relatively protected waters of St. Andrews Bay, Florida. The winds, which typically build as the day progresses, were minimal, and it was a new moon during the test period, so tidal excursions were also minimized. While measurements were obtained for ship speeds ranging from 3.1 to 6.2 m/s (6 to 12 knots), equivalent to Froude number range based on length (47 m) of 0.14 to 0.29, respectively, the focus of the comparison is for the 0.24 Froude number (10.5 knots full scale) case. Measurements of the full scale stern wave were made by a scanning laser altimeter, while measurements at model scale were made using a traversing set of conductivity finger probes.
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Connell, Benjamin S. H., Jason P. Rudzinsky, Christopher S. Brundick, William M. Milewski, John G. Kusters, and Gordon Farquharson. "Development of an Environmental and Ship Motion Forecasting System." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-42422.

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Military sea basing operations include mooring ships together offshore and transferring cargo and equipment between them. A newly developed Environmental and Ship Motion Forecasting (ESMF) System will facilitate these operations by providing predictions of ship motions in waves. Coherent forecasts of the ship motions are provided through remote sensing of the ambient waves and using these waves as input to a predictive ship motion simulation. Key technologies developed in support of the ESMF system include: a custom-built wave sensing radar; a least squares inverse wave retrieval algorithm; a ship motion model for performing rapid seakeeping simulations; and a robust peer-to-peer system architecture. The ESMF system was tested extensively in a demonstration aboard the R/V Melville with very good results, often achieving correlations of forecast-to-realized signals of better than 80% over 30 minute intervals.
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Skjetne, Roger, Mikkel E. N. Sørensen, Morten Breivik, Svenn A. T. Værnø, Astrid H. Brodtkorb, Asgeir J. Sørensen, Øivind K. Kjerstad, Vincenzo Calabrò, and Bjørn Ole Vinje. "AMOS DP Research Cruise 2016: Academic Full-Scale Testing of Experimental Dynamic Positioning Control Algorithms Onboard R/V Gunnerus." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62045.

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In order to validate relevant dynamic positioning (DP) control algorithms in a realistic environment, a full-scale DP test campaign, the AMOS DP Research Cruise 2016 (ADPRC’16), was organized in a collaboration between the NTNU Centre for Autonomous Marine Operations and Systems (NTNU AMOS) and the company Kongsberg Maritime onboard the research vessel (R/V) Gunnerus. To the authors’ best knowledge, closed-loop DP feedback control algorithms have never been tested full-scale on a ship in an academic research experiment before. However, we have now achieved this by coding our algorithms into a test-module of the DP system, as prepared by Kongsberg Maritime. Among the tested algorithms is an output feedback control law with both good transient and steady-state performance. In another experiment, different adaptive backstepping control laws for DP were tested to compare and contrast their performance and properties. A hybrid state observer with a performance monitoring function proposed to switch between two observers, choosing the best one at any time instant, was also part of the test scope. For this, necessary measurements (including acceleration measurements) were logged to be able to rerun and validate the observer algorithms in post-processing. Finally, several experiments were done to test a pseudo-derivative feedback control law for DP. The feedback mechanism was tested with and without a feedforward disturbance rejection term, called acceleration feedforward. This paper reports the experimental setup, test program, and an overview of results from the ADPRC’16 campaign.
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McTaggart, Kevin, and Jean-François Marly. "Seakeeping of a Research Vessel With Azimuthing Propellers." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41115.

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This paper gives comparisons of numerical predictions with seakeeping model tests for R/V Melville, an oceanographic research vessel that is propelled by two ducted azimuthing propellers. The model tests were conducted on a 1/23 scale model that was controlled by a human pilot using a remote control. The ship motions were predicted using the ShipMo3D ship motion library, which uses potential flow theory to determine hull radiation and diffraction forces. Predicted roll and pitch motions give good agreement with model tests. Predicted yaw motions and azimuthing propeller deflection angles are much less than values observed during the model tests. Challenges with prediction of yaw and azimuthing propeller deflection are likely due to approximation of the human model pilot with a simple proportional-derivative (PD) autopilot. The comparisons between numerical predictions and model tests suggest that the azimuthing propellers have minimal influence on roll for R/V Melville.
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Milewski, William M., Benjamin S. H. Connell, Valerie J. Vinciullo, and Ivan N. Kirschner. "Reduced Order Model for Motion Forecasts of One or More Vessels." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-42421.

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The reduced order model at the heart of the APS Environmental and Ship Motion Forecasting system must retain the accuracy of a higher fidelity seakeeping code while simultaneously meeting computational speed required to provide motion forecasts minutes into the future for two or more ships operating in close proximity. We describe the mathematical formulation of the reduced order model and efficient modeling techniques to construct databases of wave force Response Amplitude Operators and Impulse Response Functions before presenting comparisons between the reduced order model, a higher fidelity seakeeping code called AEGIR, and experimental data for the R/V Melville and two multi-ship configurations.
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Fu, Thomas C., Anne M. Fullerton, and David A. Drazen. "Free-Surface Measurements in a Tow Tank Using LiDAR." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78464.

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Light Detection and Ranging, or LiDAR, is a remote sensing technique that can be utilized to collect topographic data. These systems have been used extensively to measure open ocean and ship generated waves. Recently LiDAR systems have been used to measure the transom wave of the R/V Athena I and ambient ocean waves. This work has primarily focused on providing the time averaged, and spectral content of the wave field, by scanning the laser to measure wave profiles evolving in time. This paper describes recent efforts to utilize LIDAR systems to measure free-surface elevations in laboratory tow tanks. LiDAR measurements are limited to the white-water breaking regions of the flow, due to the limited strength of the signal return from non-breaking regions. In extending LiDAR measurements to a laboratory tow tank environment the lack of surface roughness and hence the lack of surface light scatterers needed to be addressed. A number of laboratory measurement applications will be described including a tow tank measurement similar to the R/V Athena I effort, and also measurement of regular and irregular breaking waves.
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Castro, Alejandro M., and Pablo M. Carrica. "Full Scale Simulations of the Bubbly Flow Around the Research Vessel Athena With Incoming Waves and Discretized Propeller." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-04036.

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Simulations of the two-phase bubbly flow around the research vessel Athena are presented. These are performed using a polydisperse model where several bubbles sizes are modeled. Intergroup transfer mechanisms such as breakup, coalescence and dissolution of air into water are considered. These simulations are performed on the fully appended Athena R/V including the rotating propeller. In this way the interaction of the stream of bubbles pushed down by the ship and the propeller is explicitly taken into account. Incoming regular waves are included in the simulations to mimic the observations of available data that show a pulsating entrainment of bubbles due to the waves. The effect of the several intergroup transfer mechanisms on the bubbly field around the ship is analyzed and discussed in depth. Simulations are performed in full scale to predict realistic turbulent structures and allow for a valid comparison with experiments.
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Li, J., A. M. Castro, and P. M. Carrica. "Progress on Prediction of Bubbly Flows Around Ships." In ASME 2016 Fluids Engineering Division Summer Meeting collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fedsm2016-7665.

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This paper presents recent progress on prediction of bubbly flows around ships, including bubble entrainment modeling, bubble transport and numerical issues. The bubbly flow is described by a polydisperse two-fluid model that can predict the bubble entrainment locations and rates, bubble dissolution, breakup and coalescence rates, bubble velocities, turbulence quantities and bubble size distribution. To test the performance of the two phase flow model, several simulations are conducted on canonical bubbly flows with wave breaking. These well experimentally studied flows provide important information for the design of the bubble entrainment model, which is the weakest link in the model chain but crucial for prediction of the bubbly wake. The results are compared with experimental data to study the model’s accuracy and to calibrate the entrainment model constants. Full scale simulations for the flat bottom Kann boat and the Athena R/V are performed to evaluate the model under more complex flows of naval relevance that have considerable data available. It is found that the model calibrated with canonical problems predicts good results for Athena R/V, but the current turbulent entrainment model significantly underestimates the entrainment at the bow of Kann boat due to other entrainment mechanisms involved (entrainment due to impact, droplets, etc.). The breakup model, which currently considers turbulent mechanisms, underestimates the population of small bubbles in the boundary layer where strong shear is present. Finally, a grid study is carried on Athena R/V to test grid convergence. Void fraction and size distribution are compared against available experimental data and discussed in detail. Overall, the simulations show encouraging results considering the complexity of two phase flow involved in ship applications, and the model is proven to be grid independent, a very important property for practical applications.
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Hughes, K. D. "The Role of Ozone in Marine Environmental Protection." In SNAME Maritime Convention. SNAME, 2014. http://dx.doi.org/10.5957/smc-2014-oc1.

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Ozone has an important but as yet largely unfulfilled role to play in reducing damage to marine ecosystems, as well as, improving the onboard environment and living conditions for all shipboard personnel. Ozone can provide pure and safe potable water that is critical to vessel safety as pure water has an immediate impact on the health and morale of both crew and passengers. Ozone can also be the central player to eliminate chlorine in the disinfection of sewage in a new type of MSD that recycles the water for reuse in toilets. Controlling the spread of non-indigenous, invasive species transported in ballast water is another beneficial and valuable application of ozone The in situ purification of potable water in the holding tanks is in use 24/7 aboard four US Navy-owned ships, Research Vessels Knorr, Atlantis, Roger Revelle, and Melville and one NSF-owned ship, R/V Oceanus. Woods Hole Oceanographic Institution was the first to opt for an ozone-based Water Quality Assurance system to treat water stored in the ship’s fresh water holding tanks in 1996andwith immediate success of the first installation the rest followed soon thereafter. The most recent installations of the Chem-Free WQA (Water Quality Assurance) system aboard new US Navy vessels are AGOR 27, R/V Neil Armstrong, commissioned in April 2014, and AGOR28 R/V Sally Ride. Ozone is also being used on board yachts from 31 ft. to over 300 ft., both power and sail, for indoor air quality and odor control, as well as odor control in the headspace of black and gray water holding tanks and simultaneous treatment of potable water. The marine environment, be it fresh, brackish, or salt, is exceptionally delicate. Environmental changes wrought by the activities of human activities worldwide are happening far too rapidly for marine species to evolve strategies that are necessary to successfully deal with them. Maintaining the health and viability of the marine ecosystem is absolutely essential to protect all aquatic life forms, as well as, humanity itself and preserve them for posterity. This paper will details several uniquely different applications in which ozone can best be used to the benefit of the marine environment on both outside and inside a vessel’s hull.
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Hassani, Vahid, Andrew Ross, Ørjan Selvik, Dariusz Fathi, Florian Sprenger, and Tor Einar Berg. "Time Domain Simulation Model for Research Vessel Gunnerus." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41786.

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A research vessel (RV) plays an important role in many fields such as oceanography, fisheries and polar research, hydrographic surveys, and oil exploration. It also has a unique function in maritime research and developments. Full-scale sea trials that require vessels, are usually extremely expensive; however, research vessels are more available than other types of ship. This paper presents the results of a time-domain simulation model of R/V Gunnerus, the research vessel of the Norwegian University of Science and Technology (NTNU), using MARINTEK’s vessel simulator (VeSim). VeSim is a time-domain simulator which solves dynamic equations of vessel motions and takes care of seakeeping and manoeuvring problems simultaneously. In addition to a set of captive and PMM tests on a scale model of Gunnerus, full-scale sea trials are carried out in both calm and harsh weather and the proposed simulation model is validated against sea trial data.
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Reports on the topic "Varuna (R. V.) (Ship)"

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Lamerdin, Stewart. R/V Point Sur Ship Operations. Fort Belvoir, VA: Defense Technical Information Center, April 2011. http://dx.doi.org/10.21236/ada540741.

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Ljunggren, Paul W., and John Diebold. Ship Operations: R/V EWING Support for REDSOX. Fort Belvoir, VA: Defense Technical Information Center, December 2001. http://dx.doi.org/10.21236/ada399272.

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Harvey, James. Office of Naval Research (ONR) Support for R/V Point Sur Ship Operations. Fort Belvoir, VA: Defense Technical Information Center, January 2016. http://dx.doi.org/10.21236/ada626816.

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Flanders, Joanne, and Eric Niiler. New Frontiers in Ocean Exploration: The E/V Nautilus, NOAA Ship Okeanos Explorer, and R/V Falkor 2020 Field Season. Edited by Nicole Raineault. The Oceanography Society, March 2021. http://dx.doi.org/10.5670/oceanog.2021.supplement.01.

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