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1
Rethwisch, Michael D., and Jessica Grudovich. "Spider mite management in spring alfalfa utilizing swather applied treatments, 2003." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/205399.
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An experiment was initiated utilizing a swather based sprayer to determine if miticides applied at cutting would be an effective control method of spider mites in low desert alfalfa hay. Two treatments (Trilogy, Trilogy + Kinetic) were applied the morning of May 23, 2003, to alfalfa with very high numbers of spider mites. Treatments had five replications, with plots sampled on June 2, 9 and 18. Data indicated a severe reduction in spider mite numbers as of June 2 in all treatments (including untreated) thought due to high temperatures experienced shortly after cutting that exceeded lethal thresholds for spider mite survival. Differences in treatments for spider mites or western flower thrips were not noted until June 18, when significantly fewer spider mites were noted in Trilogy treated plots than untreated check plots. Trilogy + Kinetic treatments resulted in numerically fewer spider mites than the untreated check on this sample date, but numerically more than Trilogy treatment.
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Rethwisch, Michael D., Manuel Luna, Michael Williams, Amanda Saenz, Mark Reay, and Jessica Grudovich. "Swather Applied Trilogy® Effects on Twospotted Spider Mite Populations and Resultant Alfalfa Yields and Quality." College of Agriculture, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/203839.
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Trilogy® was applied via swather at cutting in April to alfalfa infested with twospotted spider mites. Data from samples obtained at 12 days after application noted somewhat reduced spider populations as a result of Trilogy® application, although new growth was thought to be re-infested from previously cut alfalfa which was in contact with new growth. Western flower thrips later became very prominent in plots and resulted in greatly reduced spider mite populations. Trilogy® treatment resulted in increased yields thought due to larger stem diameters as a result of fewer spider mites early in study. Very slight increases were also noted for alfalfa quality parameters as a result of Trilogy® application. Economic analysis indicated that Trilogy® applied via swather in this experiment resulted in a net increase in alfalfa valued at $2.12/acre.
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Swatek, Elisabeth [Verfasser]. "Bedingungen der Motivation von Mittelschullehrkräften im Teamteaching / Elisabeth Swatek." München : GRIN Verlag, 2021. http://d-nb.info/1232493384/34.
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Al-jowder, Jassim Abdulla. "Comparative resistance calculations for SLICE/SWATH hulls." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA298191.
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Djatmiko, Eko Budi. "Hydro-structural studies on swath type vessels." Thesis, University of Glasgow, 1992. http://theses.gla.ac.uk/5508/.
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This thesis presents a study on SWATH type vessels which is directed towards the collection and use for structural design of experimental data related to motions and primary dynamic loads of such vessels. This data will be of use in the validation of a mathematical model for motion and wave load predictions recently developed at the Department. Further, experimental data on slamming will also be acquired to lay a foundation for the future development of a reliable analytical model. Design loads pertinent to SWATHs comprising the extreme primary loads, lifetime cyclic loads and local panel pressures are then built upon the former findings to be of use in structural designs, especially in the determination of initial scantlings and fatigue characterisation. Examples are given throughout on the evaluation of hypothetical SWATHs operating in the North Atlantic. The underlying theoretical formulation of SWATH ship motions is presented together with a description of a newly developed motion prediction theory. This is followed by a clarification of the procedures for conducting seakeeping tests on SWATH models. Validation of the analytical motion model by the measured data of single and tandem strut SWATH models is then presented. Subsequently, practical applications of implementing motion predictions to the assessment of SWATH operatiblity in real seaways are described. Theoretical background of SWATH primary wave loads is briefly outlined. The enhancement of the motion program MARCHS to tackle the primary load on SWATHs is described. The development of experimental data on SWATH loadings by way of seakeeping techniques is presented. Correlation of this experimental data and the theoretical assessment is made to demonstrate the validity of the mathematical model so developed. Lifetime cyclic and extreme loads required in the fatigue and ultimate strength designs, respectively, are developed by applying long- and short-term wave statistics.
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Olaoye, Abiodun Timothy. "Hydrodynamics of unconventional SWATH vessels in waves." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100101.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 79-80).
The motion responses of unconventional Small Water-plane Area Twin Hull (SWATH) vessels are unique in the sense that viscosity has significant non-linear effects on their hydrodynamic parameters. The parametric optimization of the hull shape of these vessels to reduce the total resistance in waves yields an interesting hull form where viscous effects become significant and this kind of problem is generally more difficult to solve. This study aims to investigate the motion response of these special kind of ships in waves using both numerical and experimental approach with some theoretical simplifications to better understand the hydrodynamics of the ship. The two modes of motion of interest in this study are heave and pitch motions which were chosen in order to focus on the degrees of freedom which significantly contributes to the resistance of the ship in head waves. The vessel under investigation is an unmanned surface vessel (USV) proposed to be used to monitor a team of autonomous underwater vehicles. A scaled version of this model is built and some experiments were conducted at the MIT towing tank at zero speed. Additionally, the numerical methods are implemented using 2D and 3D potential flow solvers. As this is an ongoing project, the results obtained so far including the study of the effects of the inertial characteristics of the ship on the response amplitude operator (RAO) are presented.
by Abiodun Timothy Olaoye.
S.M.
7
Velonias, Platon Michael. "Vibration analysis of a SWATH-type ship." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38129.
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Sudhakar, Swathi [Verfasser]. "Germanium nanospheres as high precision optical tweezers probes / Swathi Sudhakar." Tübingen : Universitätsbibliothek Tübingen, 2021. http://d-nb.info/1236994094/34.
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Guttenplan, Adam (Adam David). "Hydrodynamic evaluation of high-speed semi-SWATH vessels." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39726.
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Thesis (S.M. in Naval Architecture and Marine Engineering)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.Includes bibliographical references (p. 62).
High-speed semi-displacement vessels have enjoyed rapid development and widespread use over the past 25 years. Concurrent with their growth as viable commercial and naval platforms, has been the advancement of three-dimensional computational fluid dynamics codes that simulate steady and unsteady free surface potential flows around ships. The most promising of these computer-based simulations employ a variation of the Rankine Panel Method, or R.P.M. R.P.M.'s offer greater prediction accuracy than industry standard two-dimensional strip and slender-body methods, and are enjoying increased use in practical vessel design due to their reliability and low relative cost. This study uses one such code to examine the high-speed hydrodynamic performance of a slender, semi-SWATH, prototype catamaran with variable demi-hull separation. Hull separation's influence on vessel performance was studied in terms of calm water resistance and seakeeping response in a bare-hull state, and when equipped with quasi-active lifting appendage control. Analysis was performed on a 10.5m, 10,000kg reduced waterplane area catamaran designed by Lockheed Martin Maritime Systems & Sensors.
(cont.) In accordance with a non-disclosure agreement, specific hull geometry has been deemed proprietary and is not revealed. Principle vessel dimensions, body, and free surface meshing however, are discussed. The hydrodynamic characteristics of each hull separation and lifting appendage configuration were analyzed by the general purpose, potential flow, time domain, Rankine Panel Method, software package, SWAN2 2002. An acronym for Ship Wave ANalysis, SWAN2 2002 is a state-of-the-art computational fluid dynamics code developed in MIT in recent years, and is utilized principally as a numerical towing tank.
by Adam Guttenplan.
S.M.in Naval Architecture and Marine Engineering
10
Wu, June Young. "SWATH vertical motions with emphasis on fixed fins control." Thesis, University of Glasgow, 1985. http://theses.gla.ac.uk/6935/.
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The SWATH ship has been claimed as one of the advanced high performance vessels which can provide good seakeeping characteristics as well as maintaining high speed in rough seas. Despite the considerable amount of research and development carried out in the last fifteen years, there is still a lack of design data in the open literature concerning many of the specialised aspects of SWATH design. Two of these areas are the motion characteristics of hulls which are operating fairly close to the water surface and the design of active control systems to reduce static trim and motions in waves. This study is an investigation, both theoretically and experimentally using a model, into SWATH motion characteristics in the vertical plane. It aims to have an understanding of the seakeeping behaviour with and without the effect of fins in waves. The computer program for the motion prediction involves the computation of the hydrodynamic coefficients of the equations of motion on the practical range of frequencies, depth of submergences and column widths. The effects of these factors on the sectional hydrodynamic coefficients are discussed and are curve-fitted into approximate formulae in order to save computer time. The total (three dimensional) hydrodynamic coefficients are integrated stripwise, taking into account the forward speed and viscous effects. Analytic methods for the wave induced exciting forces were formulated and obtained by two approaches; the modified Morison's formula and the strip theory. The sectional Froude-Krylov force, caused by the undisturbed incident wave pressure and a diffraction component resulting from the distortion of the wave train by the presence of the hull integrated over the mean immersed surface of the hull section. Phase differences of the sectional forces are considered during the integration procedure. The forward speed and viscous effects are included together. In addition, a series of laboratory tests in calm water and waves as well as theoretical studies aimed at the design of vertical-plane control surface (fins), which would keep the SWATH ship on a near level trim at speed in calm water and reducing the inherently low level of motion in wave have been carried out. The forces generated by fins are composed of inertia effects and viscous induced lift and cross-flow drag. Since the fins are attached to the hull, the lift-curve slope were corrected by the fin-body effect. Only after fins are considered in the study, the combination of the forward fins are believed could be summed linearly. However, the downwash effect on the after fins by the forward fins are not able to be included. Since the exciting and restoring forces of a SWATH involved are smaller than those of the comparable monohull, adequate control forces can be generated for a SWATH at speed by reasonably sized fins. The good agreement of the comparisons of the analytical calculations and the experimental measurements confirms the accuracy of the study.
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Bybee, Taylor C. "An Automatic Algorithm for Textured Digital Elevation Model Formation using Aerial Texel Swaths." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/4593.
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Textured digital elevation models (TDEMs) have valuable use in precision agriculture, situational awareness, and disaster response. However, Scientific-quality models are expensive to obtain using conventional aircraft-based methods. Photogrammetry-based techniques have no direct measurements, and thus has uncertainty in the reconstruction. The concept of a texel camera, which has both aerial imagery and ladar measurements from an inexpensive small UAV, can be used to combine the two methods.
A texel camera fuses calibrated ladar measurements and electro-optical imagery upon simultaneous capture, creating a texel image. This eliminates the problem of fusing the data in a post-processing step and enables both 2D- and 3D-image registration techniques to be used. A texel camera outputs texel swaths during a UAV flight. A swath consists of an aerial image that is calibrated to associated depth measurements. This thesis describes an automatic algorithm for registering these texel swaths into a TDEM.
The algorithm involves image processing, 3D geometry, and nonlinear optimization processes. The algorithm is seeded with a coarse estimate of the position and attitude of each texel swath capture, obtained using an on-board navigation system. Analysis of several data sets registered using this algorithm is shown. This method enables an inexpensive alternative to obtaining high quality textured 3D landscapes.
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Chun, Ho Hwan. "Theoretical and experimental studies on the resistance of SWATH ships." Thesis, University of Glasgow, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237814.
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Loscombe, Peter Robin. "Key aspects of the structural design of small SWATH ships." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305967.
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Williams, Samuel E. (Samuel Ernest). "Stability and maneuvering of hybrid hydrofoil/SWATH in foilborne mode." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108905.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 80-82).
The hybrid hydrofoil/SWATH, designed and patented by Stefano Brizzolara, is a novel vehicle design that is optimized to operate in both a high speed foilborne mode and a displacement mode. The retractable hydrofoils on the vehicle take on a unique four surface piercing anhedral foil configuration. This foilborne design is previously unassessed for stability and maneuvering characteristics. A six degree of freedom model of the foilborne vehicle dynamics is introduced as a framework to study vehicle stability and maneuvering. Linearized models of the vehicle dynamics are compared to the six degree of freedom results in both the vertical and horizontal planes. Foil configuration design criteria are derived for pitch equilibrium as well as pitch and directional stability. A method for turning the vehicle by rotationally actuating the foil dihedral angles is introduced, and the vehicle state in the unsteady and steady portion of the turn is simulated.
by Samuel E. Williams.
S.M.
15
Nguyen, Trung Kiên. "Seafloor classification with a multi-swath multi-beam echo sounder." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2017. http://www.theses.fr/2017IMTA0035/document.
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Cette thèse, co-dirigée par Jean-Marc Boucher et Ronan Fablet (IMT Atlantique) et co-encadrée par Didier Charlot (iXBlue), Gilles Le Chenadec et Michel Legris (ENSTA Bretagne), a été réalisée dans le cadre d'une convention CIFRE au sein de la société iXBlue. iXblue développe et commercialise un sondeur multifaisceaux (MBES) SEAPIX principalement dédié au marché de la pêche. Ce système a été développé pour offrir le meilleur compromis entre performances de détection et son coût de revient. Outre les caractéristiques classiques d'un MBES, il propose la particularité unique de pouvoir insonifier des fauchées différentes sous le navire par dépointage électronique du faisceau d'émission de bâbord à tribord et d'avant en arrière. Le travail de thèse a pour objectif d'étudier l'apport de ces nouvelles capacités multi-fauchées dans l'analyse et la classification des fonds marins. La première partie du travail a consisté à réaliser une analyse détaillée de la chaîne de mesure. Cette étude a permis d'évaluer la consistance des niveaux de rétrodiffusion entre les différents modes d'insonification. La deuxième partie s'est intéressée à la recherche des caractéristiques discriminantes du signal rétrodiffusé en tenant compte de la géométrie d'acquisition de chaque mode d'insonification. La dernière étape du travail a porté sur des méthodes de fusion des données acquises. Cette étude s'est réalisée en deux approches; la première considère des données venant du même mode d'insonification (intra-mode) et la seconde venant de modes différents (inter-mode), pour la cartographie des fonds marins. Les résultats expérimentaux obtenus mettent en évidence l'intérêt de la chaîne de traitement proposée et d'une architecture multi-mode sur les jeux de données réelles traitéesThis thesis, co-directed by Jean-Marc Boucher and Ronan Fablet (IMT Atlantique) and co-supervised by Didier Charlot (iXBlue), Gilles Le Chenadec and Michel Legris (ENSTA Bretagne), was realized in the context of a convention CIFRE with the company iXBlue.iXblue develops and commercializes a multibeam echosounder (MBES) SEAPIX primarily dedicated to the fishery market. The system is optimized to offer the best compromise between performances capabilities and cost. In addition to the classical characteristics of an MBES, it offers the unique feature of scanning the seafloor (and the water column volume) by electronical beamform multiple the emission swaths from port to starboard, as well as from forward to backward. The objective of the thesis is to study the contribution of these new multi-swath capacities in the analysis and classification of the seafloor.The first part of the work consisted in carrying out a detailed analysis of the measurement chain. This study evaluated the consistency in acquiring the backscattering strength from different insonification modes. The second part investigated the discriminant characteristics of the backscattered signal while taking into account the acquisition geometry of each insonification mode. The last stage of the work involved to methods of fusing the acquired data. This study was carried out in two approaches; the first considers data from the same insonification mode (intra-mode) and the second from different modes (inter-mode), for the seafloor classification. The obtained experimental results highlight the interest of the proposed processing chain and a multi-mode architecture on the real datasets
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Bingley, Lemuel G. "A four receiver sidescan sonar for high definition swath bathymetry." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336058.
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Nix, Erin Elizabeth. "Effect of swath grazing on forage intake and wastage by ewes." Thesis, Montana State University, 2012. http://etd.lib.montana.edu/etd/2012/nix/NixE0512.pdf.
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Sixty non-pregnant and non-lactating mature white faced ewes (Targhee 65.4 ± 5.84 kg BW in 2010 and Rambouillet 61.9 ± 6.28 kg BW in 2011) were used in a 2-yr study to evaluate intake, forage wastage, and nutrient composition of a pea/barley forage fed either as baled hay in confinement (CONFINEMENT) or swathed and left to graze (GRAZE). Forage DMI was estimated using IVDMD and chromic oxide as an external marker for estimating fecal output. Forage wastage was estimated by sampling and weighing the initial swath, standing, and baled forage, and weighing the forage again after a 7-d collection period, and subtracting the estimated forage DMI. Samples of baled, swathed, and any standing forage were collected in August and October and analyzed for DM, OM, CP, NDF, ADF, and in situ dry matter digestibility (ISDMD). There was no treatment by year interaction (P = 0.56) for BW change and no difference (P = 0.33) between treatments. There was a treatment by year interaction (P = 0.04) for DMI. In 2010, DMI was greater (P = 0.06) by CONFINEMENT ewes compared to GRAZE ewes (2.4 vs 1.7 kg x ewe -¹ x d -¹); however, in 2011, DMI did not differ (P = 0.25) between treatments. There was no treatment by year interaction (P > 0.22) for forage wastage either as a percent of beginning available forage or as kilograms of wastage. Although percentage wastage did not differ between treatments (P = 0.23), kilograms of wastage was greater (P = 0.03) for GRAZE than CONFINEMENT. For both years in the swathed forage, ISDMD and OM decreased while NDF and ADF increased. In 2010 CP increased, but in 2011 it remained the same. For both years in the baled forage, CP decreased while ISDMD and NDF increased. In 2010, ADF decreased and OM increased, but in 2011 ADF increased and OM decreased. Although nutrient content was lower in the swath, wastage and animal performance did not differ between the treatments. This research provides a sound biological basis for an economic assessment of using swath grazing in commercial sheep operations.
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Gebert, Nicolas. "Multi-channel azimuth processing for high-resolution wide-swath SAR imaging." Köln DLR, Bibliotheks- und Informationswesen, 2009. http://d-nb.info/1000286800/34.
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Gebert, Nicolas [Verfasser]. "Multi-channel azimuth processing for high-resolution wide-swath SAR imaging / Nicolas Gebert." Köln : DLR, Bibliotheks- und Informationswesen, 2009. http://d-nb.info/1000286800/34.
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Georgiadis, Vasileios. "Design and assessment of a super high speed, hybrid hydrofoil/SWATH crew boat." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92221.
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Thesis: Nav. E., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 80).
This thesis presents the preliminary design and assessment of Wavecutter, an innovative super high speed, hybrid hydrofoil/SWATH crew boat. The intended mission of the vessel is the very-fast transportation of crew and cargo, to and from offshore installations. The design builds on Brizzolara's unmanned high speed hybrid SWATH/hydrofoil vessel concept (Brizzolara, 2010), maintaining the dual operating mode: foilborne to reach top speed of 85 knots in moderate sea states and a displacement SWATH to sail in the higher sea states. This vessel is expanding the family of unmanned hybrid SWATH vessels of Brizzolara and Chryssostomidis to include manned vessels (Brizzolara & Chryssostomidis, 2013). The special hydrofoil profile recently optimized and verified by model tests in free-surface cavitation tunnel, has been adopted, to ensure high lift to drag ratios and avoid typical instability phenomena of conventional super-cavitating hydrofoils (Brizzolara, 2013). The surface piercing configuration of the hydrofoils was adopted in order to make the vessel inherently stable, without the use of control mechanisms. The general design phase was focused on the integration of the manned module, internal arrangements, weight estimation, speed profile determination and engine selection. The hydrofoil design phase limits on resizing the four surface-piercing super-cavitating hydrofoils to keep the vessel even keel at maximum speed. To achieve this, the front foils need to have a larger size than the aft ones, due to the trim moment produced by the turbo-jet thrust force. The feasibility assessment phase in foil borne mode confirmed the static stability of the vessel and good seaworthiness in waves. It is recommended that future work be conducted with CFD simulations in unsteady conditions, to obtain a more accurate understanding of the vessel's dynamic behavior.
by Vasileios Georgiadis.
Nav. E.
S.M.
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Ragen, Devon Lynn. "Individual mineral supplement intake by ewes swath grazing or confinement fed pea-barley forage." Thesis, Montana State University, 2012. http://etd.lib.montana.edu/etd/2012/ragen/RagenD0512.pdf.
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Sixty mature ewes (non-pregnant, non-lactating) were used in a completely randomized design to determine if feeding method of pea-barley forage (swath grazing or hay in confinement) had an effect on individual ewe mineral consumption and variation in supplement intake. Thirty ewes were randomly allocated to 3 confinement pens and 30 ewes were randomly allocated to 3 grazing plots. The study was conducted September 25 to October 15, 2010 and September 6 to 19, 2011. Targhee ewes (65.4 ±5.84 kg BW) were used in 2010. Rambouillet ewes (61.9 ±6.28 kg BW) were used in 2011. Ewes had ad libitum access to food, water, and a mineral supplement containing 11 to 12.5% salt with 2% titanium dioxide added as an external marker to estimate individual mineral intake. Forage intake was calculated using estimates of fecal output obtained by dosing gelatin capsules containing 2 g chromic oxide every day for 14 d, and in vitro 48-h DM indigestibility. Fecal grab samples were collected from each individual ewe for a period of 7 d and composited by ewe. Forage and mineral intakes were analyzed using individual ewe as the experimental unit. A year ��� treatment interaction (P < 0.01) existed for forage DMI and mineral DMI. Ewes in confinement consumed more forage than grazing ewes in 2010 (2.60 vs. 1.86 kg/d, respectively), but less than grazing ewes in 2011 (1.99 vs. 2.49 kg/d, respectively). Mean mineral intake was highest (P < 0.01) by grazing ewes in 2011 and 2010 (average 69 g/d), intermediate by ewes in confinement in 2010 (57 g/d), and lowest by ewes in confinement in 2011 (31 g/d). A year ��� treatment interaction (P = 0.05) existed for mineral DMI CV. Mineral DMI CV was higher (P = 0.04) for the confinement treatment than the grazing treatment in 2011 (67.2 vs. 33.7%), but similar for confinement and grazing treatments in 2010 (55.4 vs. 46.5%, respectively). In this study, both swath grazing ewes and ewes in confinement consumed more mineral than recommended by the mineral manufacturer and the NRC indicating that more research is needed to develop a better understanding of the factors that regulate and impact mineral intake.
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Völker-Albert, Moritz [Verfasser], and Axel [Akademischer Betreuer] Imhof. "Proteomic analysis of assembled chromatin with SWATH-MS / Moritz Völker-Albert ; Betreuer: Axel Imhof." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2017. http://d-nb.info/1151447307/34.
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Luzum, Brian James. "Analysis of the stability of features and separability in airborne laser swath mapping data." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006080.
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DiMino, John Robert. "Fabrication of a SWATH vessel scale model for seakeeping tests using rapid prototyping methods." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83709.
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Thesis (S.B. in Mechanical and Ocean Engineering)--Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.Cataloged from PDF version of thesis. Vita.
Includes bibliographical references (page 26).
This paper describes the techniques used to fabricate a one meter long, 1/6 scale model of a Small Waterplane Area, Twin Hull (SWATH) Unmanned Surface Vehicle (USV) that will be used primarily for dynamic seakeeping testing in the MIT Tow Tank. The model represents a design conceived by Stefano Brizzolara, which will be used for launching, recovering, and servicing Unmanned Underwater Vehicles (UUV) at sea. Construction methods included a number of rapid prototyping methods rarely used for this kind of project, including 3D printing, lasercutting, and spraypainting. The benefits and disadvantages of each of these processes will be discussed. Although there was insufficient time to conduct any tow tank tests, several data-recording techniques are reviewed which may be used by future students continuing the research of this vessel.
by John Robert DiMino.
S.B.in Mechanical and Ocean Engineering
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Morvan, Antoine. "Impact sur le pont mouillé d’un navire SWATH pour la maintenance des éoliennes offshore." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2019. http://www.theses.fr/2019ENTA0003.
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L’objectif de ces travaux de thèse de doctorat est de développer des modèles simplifiés d’impact hydrodynamique sur le pont mouillé d’un SWATH pour la maintenance des éoliennes offshore. La connaissance des chargements hydrodynamiques auxquels est soumis le pont mouillé est une étape primordiale lors de la conception de l’étrave du navire. Pour réaliser cette étude nous avons choisi une géométrie bidimensionnelle parabolique symbolisant le pont mouillé et une houle d’Airy régulière pour la surface libre. Les modèles développés reposent sur le modèle de Wagner qui permet d’obtenir des résultats pertinents pour un faible temps de calcul. Deux types de modèles d’impact ont été développés. Des modèles dits asymptotiques car ils reposent sur un développement de Taylor du profil de houle et des modèles non-asymptotiques car ils conservent la forme complète de la houle. Les distributions de pression sur le profil parabolique sont majoritairement calculées au moyen du formalisme Modified Logvinovich Model (MLM). Les résultats en termes de corrections de surface mouillée, de champs de pression et d’efforts hydrodynamiques sont comparés entre les deux types de modèles en fonction du rayon de courbure de la houle. Nous déterminons aussi quel est la configuration d’impact qui engendre les chargements hydrodynamiques dimensionnants en se basant sur des configurations de référence. Pour les modèles non-asymptotiques, la contribution de l’amplitude et de la vitesse de phase de la houle au sein des efforts hydrodynamiques est analysée. Pour les modèles asymptotiques, nous avons réalisé l’étude des variations spatiales et temporelles des champs de pression calculés avec l’équation de Bernoulli linéarisée. Nous avons aussi comparée les résultats du formalisme composite (COMP) au formalisme MLM et leurs conséquences sur les efforts hydrodynamiques d’impact. Enfin, dans le but d’avoir une base de comparaison pour ces modèles d’impact sur houle d’Airy régulière, nous avons implémenté des modèles numériques d’impact au moyen du logiciel commercial ABAQUS/CAE. Ces modèles reposent sur un couplage CEL (Coupled Eulerian-Lagrangian) et ont montré une bonne correspondance avec les résultats des modèles non-asymptotiques en termes d’écarts relatifs. Au sein d’un bureau d’étude, l’intégralité de ces résultats peut constituer une aide au dimensionnement du pont mouillé d’un navire SWATHThe aim of this PhD thesis is to develop simplified models about hydrodynamic impact (slamming) on the wet deck of a SWATH vessel for the maintenance of offshore wind turbines. The knowledge of the hydrodynamic loadings that the wet deck is subjected is an essential step in the design of the vessel’s bow. To realise this study we chose a parabolic twodimensional geometry which symbolises the wet deck and a regular Airy wave for the moving free surface. The models developed are based on the Wagner theory which provides relevant results for a low computational time. Two types of impact models have been developed. So-called asymptotic models, because they use a Taylor expansion of the wave profil and non-asymptotic models because they retain the whole shape of the wave. The pressure distributions on the parabolic shape are mainly calculated by the Modified Logvinovich Model (MLM). The results in terms of wetted corrections, pressure fields and hydrodynamic loadings are compared between the two types of models as a function of the wave radius of curvature We also determine the hydrodynamic impact arrangement which produces the highest hydrodynamic loadings by using reference configurations. For non-asymptotic models, the contribution of wave amplitude and phase velocity within hydrodynamic loadings is analysed in details. For non-asymptotic models, we made the study of the spatial and time variations of pressure fields computed with the linearized Bernoulli equation. We also compared the results of composite theory (COMP) to MLM theory and their consequences on hydrodynamic loadings. Finally, in order to get a basis of comparison for these regular Airy wave impact models, we implemented a numerical model using ABAQUS/CAE software. This model is based on a Coupled Eulerian-Lagrangian (CEL) coupling and show good matching with the results of non-asymptotic models in terms of relative errors. In a design office, all those results can be used to help design of the wet deck of a SWATH vessel
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Sasikumar, Kollassery Swathi [Verfasser]. "Photon-Photon processes at the International Linear Collider and BSM signatures with small mass differences / Kollassery Swathi Sasikumar." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/1228537844/34.
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Younis, Marwan [Verfasser]. "Digital beam-forming for high resolution wide swath real and synthetic aperture radar / Marwan Younis." Karlsruhe : IHE, 2004. http://d-nb.info/1005525447/34.
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Caceres, Jhon. "Classification of building infrastructure and automatic building footprint delineation using Airborne Laser Swath Mapping data." [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0023693.
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Foresta, Luca Umberto. "Applications of CryoSat-2 swath radar altimetry over Icelandic ice caps and Patagonian ice fields." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31165.
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Satellite altimetry has been traditionally used in the past few decades to measure elevation of land ice, quantify changes in ice topography and infer the mass balance of large and remote areas such as the Greenland and Antarctic ice sheets. Radar altimetry is particularly well suited to this task due to its all-weather year-round capability of observing the ice surface. However, monitoring of ice caps and ice fields - bodies of ice with areas typically smaller than ~ 10,000 km2 - has proven more challenging. The large footprint of a conventional radar altimeter and coarse ground track coverage are less suited to observing comparatively small regions with complex topography. Since 2010, the European Space Agency’s CryoSat-2 satellite has been collecting ice elevation measurements over ice caps and ice fields with its novel radar altimeter. CryoSat-2’s smaller inter-track spacing provides higher density of observations compared to previous satellite altimeters. Additionally, it generates more accurate measurements because (i) the footprint size is reduced in the along-track direction by means of synthetic aperture radar processing and (ii) interferometry allows to precisely locate the the across-track angle of arrival of a reflection from the surface. Furthermore, the interferometric capabilities of CryoSat-2 allow for the processing of the delayed surface reflections after the first echo. When applied over a sloping surface, this procedure generates a swath of elevations a few km wide compared to the conventional approach returning a single elevation. In this thesis, swath processing of CryoSat-2 interferometric data is exploited to generate topographic data over ice caps and ice fields. The dense elevation field is then used to compute maps of elevation change rates at sub-kilometer resolution with the aim of quantifying ice volume change and mass balance. A number of algorithms have been developed in this work, partly or entirely, to form a complete processing chain from generating the elevation field to calculating volume and mass change. These algorithms are discussed in detail before presenting the results obtained in two selected regions: Iceland and Patagonia. Over Icelandic ice caps, the high-resolution mapping reveals complex surface elevation changes, related to climate, ice dynamics and sub-glacial, geothermal and magmatic processes. The mass balance of each of the six largest ice caps (90% of Iceland’s permanent ice cover) is calculated independently for the first time using spaceborne radar altimetry data. Between October 2010 and September 2015 Icelandic ice caps have lost a total of 5.8± 0.7 Gt a ̄1, contributing 0.016± 0.002 mm a ̄1 to eustatic sea level rise. This estimate indicates that over this period the mass balance was 40% less negative than the preceding 15 years, a fact which partly reflects the anomalous positive balance year across the Vatnaj ̈okull ice cap (~ 70% of the glaciated area) in 2014/15. Furthermore, it is demonstrated how swath processing of CryoSat-2 interferometric data allows the monitoring of glaciological processes at the catchment scale. Comparison of the geodetic estimates of mass balance against those based on in situ data shows good agreement. The thesis then investigates surface elevation change on the Northern and Southern Patagonian Ice Fields to quantify their mass balance. This area is characterized by some of the fastest flowing glaciers in the world, displaying complex interactions with the proglacial environments (including marine fjords and freshwater lakes) they often drain into. Field observations are sparse due to the inaccessibility of these ice fields and even remotely sensed data are limited, often tied to comparisons to the topography in 2000 as measured by the Shuttle Radar Topography Mission. Despite gaps in the spatial coverage, in particular due to the complex topography, CryoSat-2 swath radar altimetry provides insight into the patterns of change on the ice fields in the most recent period (2011 to 2017) and allows to independently calculate the mass balance of glaciers or catchments as small as 300 km2. The northern part of the Southern Patagonian ice field displays the strongest losses due to a combination between ice dynamics and warming temperatures. In contrast Pio XI, the largest glacier on this ice field and in South America, is advancing and gaining mass. Between April 2011 and march 2017, the two ice fields combined have lost an average of 21.29± 1.98 Gt a ̄1 (equivalent to 0.059± 0.005 mm a ̄1 eustatic sea level rise), 24% and 42% more negative when compared to the periods 2000-2012/14 and 1975-2000. In particular the Northern Patagonian ice field, responsible for one third of the mass loss, is losing mass 70% faster compared to the first decade of the 21st century. These results confirm the overall strong mass loss of the Patagonian ice fields, second only to glaciers and ice caps in Alaska and the Canadian Arctic, and higher than High Mountain Asia, which all extend over areas ~ 5-8 times larger (excluding glaciers at the periphery of the Greenland and Antarctic ice sheets).
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Queiroz, de Almeida Felipe [Verfasser], and A. [Akademischer Betreuer] Moreira. "Multichannel Staggered SAR for High-Resolution Wide-Swath Imaging / Felipe Queiroz de Almeida ; Betreuer: A. Moreira." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1153828626/34.
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Banthiya, Swathi [Verfasser]. "Recombinant expression and characterization of a prokaryotic lipoxygenase from Pseudomonas aeruginosa. Investigations into the biological role of this enzyme / Swathi Banthiya." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1137867817/34.
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Kelly, Robyn K. "Subduction dynamics at the middle America trench : new constraints from swath bathymetry, multichannel seismic data, and ¹⁰Be." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/59656.
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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and the Woods Hole Oceanographic Institution), September 2003.Includes bibliographical references.
The cosmogenic radionuclide ¹⁰Be is a unique tracer of shallow sediment subduction in volcanic arcs. The range in ¹⁰Be enrichment in the Central American Volcanic Arc between Guatemala and Costa Rica is not controlled by variations in ¹⁰Be concentrations in subducting sediment seaward of the Middle America Trench. Sedimentary ¹⁰Be is correlated negatively with ¹⁴³ND/¹⁴⁴Nd, illustrating that ¹⁰Be concentrations varied both between and within cores due to mixing between terrigenous clay and volcanic ash endmember components. This mixing behavior was determined to be a function of grain size controls on ¹⁰Be concentrations. A negative correlation of bulk sedimentary ¹⁰Be concentrations with median grain size and a positive correlation with the proportion of the sediment grains that were <32 [mu]m in diameter demonstrated that high concentrations of ¹⁰Be in fine-grained, terrigenous sediments were diluted by larger grained volcanogenic material. The sharp decrease in ¹⁰Be enrichment in the Central American Volcanic Arc between southeastern Nicaragua and northwestern Costa Rica correlates with changes in fault structure in the subducting Cocos plate. Offshore of Nicaragua, extensional faults associated with plate bending have throw equal to or greater than the overlying subducting sediment thickness. These faults enable efficient subduction of the entire sediment package by preventing relocation of the d6collement within the downgoing sediments.
(cont.) Offshore of Costa Rica, the reduction of fault relief results in basement faults that do not penetrate the overlying sediment. A conceptual model is proposed in which the absence of significant basement roughness allows the d6collement to descend into the subducting sediment column, leading to subsequent underplating and therefore removal of the bulk of the sediment layer that contains ¹⁰Be. Basement fault relief was linearly related to plate curvature and trench depth. The systematic shoaling of the plate from southeastern Nicaragua to northwestern Costa Rica is not explained by changes in plate age for this region. Instead, it is hypothesized that the flexural shape of the plate offshore of southeastern Nicaragua and northwestern Costa Rica represents a lateral response to a buoyant load caused by the thick crust and elevated thermal regime in the Cocos plate offshore of southeastern Costa Rica.
by Robyn K. Kelly.
Ph.D.
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Srivatsa, Swathi [Verfasser], Victor [Akademischer Betreuer] Tarabykin, Judith [Akademischer Betreuer] Stegmüller, and André [Akademischer Betreuer] Fischer. "Transcriptional control of the establishment of neocortical projections in the mammalian telencephalon / Swathi Srivatsa. Gutachter: Judith Stegmüller ; André Fischer. Betreuer: Victor Tarabykin." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://d-nb.info/1065044690/34.
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Raj, Oliver Neal. "Multi-Fidelity Structural Modeling For Set Based Design of Advanced Marine Vehicles." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83377.
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This thesis demonstrates that a parametrically-modifiable Advanced Marine Vehicle Structural (AMVS) module (that can be integrated into a larger framework of marine vehicle analysis modules) enables stakeholders, as a group, to complete structurally feasible ship designs using the Set-Based Design (SBD) method. The SBD method allows stakeholders to identify and explore multiple solutions to stakeholder requirements and only eliminating the infeasible poorer solutions after all solutions are completely explored. SBD offers the and advantage over traditional design methods such as Waterfall and Spiral because traditional methods do not adequately explore the design space to determine if they are eliminating more optimal solutions in terms of cost, risk and performance.
The fundamental focus for this thesis was on the development of a parametrically modifiable AMVS module using a low-fidelity structural analysis method implemented using a numerical 2D Finite Element Analysis (FEA) applied to the HY2-SWATH. To verify the AMVS module accuracy, a high-fidelity structural analysis was implemented in MAESTRO to analyze the reference marine vehicle model and provide a comparison baseline. To explore the design space, the AMVS module is written to be parametrically modified through input variables, effectively generating a new vessel structure when an input is changed. AMVS module is used to analyze an advanced marine vessel in its two operating modes: displacement and foil-borne. AMVS demonstrates the capability to explore the design space and evaluate the structural feasibility of the advance marine vehicle designs through consideration of the material, stiffener/girder dimensions, stiffener/girder arrangement, and machinery/equipment weights onboard.Master of Science
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Chicooree, Navin. "Enhancing the mass spectrometric analysis of ubiquitin-like modifications." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/enhancing-the-mass-spectrometric-analysis-of-ubiquitinlike-modifications(ab42ea7c-73d1-4348-85e5-69813be451f7).html.
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Mamalian protein ubiquitination and SUMOylation are reversible post translational modifications, which are involved in a multitude of important complex regulatory processes within the cell. Current mass spectrometry approaches that involve bottom-up proteomics to comprehensively analyse these modifications, have proved to be problematic. In this work, analytical approaches are carried out to improve and enhance the comprehensive analysis of these modifications. Tryptic proteolysis of ubiquitinated proteins results in the generation of isopeptides bearing adi-glycine (GG) remnant. Current mass spectrometry approaches used to identify these isopeptides are predominantly reliant on detecting the signature mass shift of the GG remnant (114.043 Da). The lack of sequence information from the GG remnant post MS/MS acquisition results in database search algorithms falsely identifiying these isopeptides. Reductive methylation chemistry was employed to derivatize these isopeptides. Upon collision induced dissociation of the isopeptides two robust ions were released from the iso-N-terminus of the GG remnant ; i) an a1’ ion at m/z 62.09, corresponding to the G of the remnant and ii) a b2’ ion at m/z 147.11, corresponding to the full GG remnant. Post-acquisition data extraction of these unique diagnostic ions demonstrated enhanced selectivity towards identifying these isopeptides. Tryptic proteolysis of SUMOylated proteins results in the generation of isopeptides bearing a substantial iso-C-terminal SUMO remnant. The CRA(K) (Consecutive Residue Addition tolysines (K)) approach combined independant use of proteolytic enzymes and unbiased consecutive residue addition of amino acids pertaining to these iso-C-terminal SUMOremnants, on all lysine residues. This approach enabled the identification of analytically useful novel wildtype isopeptides derived from the proteolysis of SUMO(1/2/3)ylated proteins, bearing GG, TGG and QTGG remnants. The analytically useful isopeptides derived from proteolysis of SUMO(2/3)ylated proteins lacked robust diagnostic information from their iso-C-terminal bearing TGG and QTGG remnants. Reductive methylation chemistry was utilised to derivatize these isopeptides and enabled diagnostic a’ and b’ ions to be released from their iso-N-termini; i) a1’ (m/z 133.13),b2’ (m/z 262.17) and b4’ (m/z 376.22) ions, corresponding to the QTGG remnant and ii) (m/z106.10), b2’ (m/z 191.14) and b3’ (m/z 248.14) ions, corresponding to the TGG remnant. Post-acquisition data extraction of these unique diagnostic ions, enabled comprehensive structural elucidation of these isopeptides and enhanced selectivity towards identification.
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Hallenborg, Eric. "The structure of mature oceanic crust : tectonic features revealed in superfast-spread Cocos plate by multichannel seismic grids and swath bathymetry /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3100378.
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Silva, Carolina Sousa. "Protemic characterization of peripheral blood mononuclear cells." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15872.
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Mestrado em Biotecnologia - Biotecnologia MolecularPeripheral blood mononuclear cells (PBMCs) play quite diverse and important roles in monitoring immune homeostasis. Thus, these subset of blood cells may provide access to potential physiological relevant biomolecules, namely proteins. For this reason, PBMCs represent a promising biological sample in scientific research, particularly as a source of potential biological markers discovery of the most diverse diseases. Prior studies of proteomic characterization of PBMCs from healthy individuals lack either the identification of a large number of proteins or its quantification in a way that is compatible with the search of potential biomarker candidates. Therefore, this study aimed to provide a comprehensive PBMCs proteome characterisation as well as to create a SWATH library. It was also evaluated if by using the BD Vacutainer® CPT™ tubes for PBMCs isolation, it would be possible to identify a larger number of immunologically relevant proteins in comparison to plasma samples. The enrichment test assay revealed that it is possible to identify more immune-related proteins from isolated PBMCs than from plasma. Moreover, the majority of the quantified proteins with an “immune system” GO term assigned is present in higher amounts in PBMCs samples. 2D LC-MS/MS proved to be the best approach to use in qualitative analysis of PBMCs and in the construction of a SWATH library, since it resulted in an increase of both identified and quantified proteins (66.3% and 16.9%, respectively) in comparison to 1D LC-MS/MS. A total of 2071 proteins were identified and it was possible to quantify 922 different proteins among six distinct samples. From these proteins, 445 were commom between all individuals. In conclusion, this work provides a comprehensive PBMCs proteome dataset that will be useful in further studies that focus on the search for potential biological markers of various pathologies in these cells. Additionally, SWATH-MS proved to be a reproducible and effective acquisition method to quantify PBMCs proteins.
As células mononucleares do sangue (CMS) desempenham diversos e importantes papéis na monitorização da homeostasia do sistema imunitário. Assim sendo, esta subpopulação de células sanguíneas pode providenciar acesso a potenciais biomoléculas relevantes a nível fisiológico, nomeadamente proteínas. Por esta razão, as CMS representam uma amostra biológica promissora na investigação científica, particularmente na descoberta de potenciais marcadores biológicos de diversas doenças. Estudos anteriores de caracterização proteómica das CMS de indivíduos saudáveis falharam quer na identificação de um grande número de proteínas, quer na sua quantificação, de forma compatível com a pesquisa de potenciais biomarcadores. Portanto, este estudo teve como objectivo providenciar uma caracterização proteómica abrangente, bem como a criação de uma biblioteca SWATH. Foi igualmente avaliado se usando tubos CPT™ disponíveis na BD Vacutainer® para o isolamento das CMS, seria possível identificar um maior número de proteínas imunologicamente relevantes comparativamente a amostras de plasma. O teste de enriquecimento revelou que é possível identificar mais proteínas associadas ao sistema imunitário em CMS isoladas do que em amostras de plasma. Também se verificou que a maioria das proteínas quantificadas com ontologia genética “sistema imunitário” estão presentes em maior quantidade nas amostras de CMS. 2D LC-MS/MS mostrou ser a melhor abordagem na análise qualitativa das CMS e na elaboração da biblioteca SWATH, uma vez que o número de proteínas identificadas e quantificadas apresentou um aumento de 66,3% e 16,9%, respectivamente, comparativamente à 1D LC-MS/MS. No total foram identificadas 2071 proteínas e foi possível quantificar 922 proteínas diferentes em seis amostras distintas. Destas, 445 proteínas eram comuns a todos os indivíduos. Em conclusão, este trabalho disponibiliza um amplo conjunto de dados do proteoma das CMS que será útil a estudos futuros que pretendam centrar-se na pesquisa de potenciais marcadores biológicos, nas CMS, das mais diversas patologias. Além disso, comprovou-se que o método de aquisição SWATH-MS é reprodutível e eficaz na quantificação das proteínas das CMS.
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Yagüe, Martínez Néstor [Verfasser], Michael [Akademischer Betreuer] Eineder, Alberto [Gutachter] Moreira, Andrew [Gutachter] Hooper, Richard H. G. [Gutachter] Bamler, and Michael [Gutachter] Eineder. "Burst-Mode Wide-Swath SAR Interferometry for Solid Earth Monitoring / Néstor Yagüe Martínez ; Gutachter: Alberto Moreira, Andrew Hooper, Richard H. G. Bamler, Michael Eineder ; Betreuer: Michael Eineder." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1202922724/34.
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Correia, Ricardo Lionel Gonçalves. "Detailed seafloor morphology of the East Antarctic continental shelf, between 128º and 134ºE." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/18063.
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Mestrado em Engenharia GeológicaDados de batimetria multifeixe e de sísmica de alta resolução, adquiridos na plataforma continental da Antártida, região Este, permitiram o reconhecimento de aspetos geomorfológicos derivados da dinâmica glaciar associada a um manto de gelo mais extenso no passado. No âmbito do projeto científico Norte-americano, Vulnerability of East Antarctic ice shelves da NSF (National Science Foundation), e do projeto EAIS-MARGINS do Programa Polar português (PROPOLAR), foi realizada a interpretação e análise quantitativa dos diversos aspetos morfológicos através da morfometria e análise estatística, com o objetivo de melhor entender a dinâmica do manto de gelo no passado. A área de estudo inclui um segmento da plataforma continental compreendida entre os glaciares Frost e Dibble (128ºE e 134ºE). Os dados foram adquiridos na campanha de investigação NBP1503 em Abril de 2015, a bordo do navio RVIB Nathaniel B. Palmer dos Estados Unidos da América. Os resultados revelam uma plataforma continental situada entre os 300 e 990 m de profundidade. A zona proximal e intermédia é caracterizada por um aspeto irregular, onde é possível constatar a presença de meltwater channels com mais de 230 m de profundidade e formas semelhantes a drumlins, identificadas entre os 800 e 900 m de profundidade. Sulcos deixados pela deriva de icebergs são esporadicamente observados na zona distal da plataforma continental entre os 380-410 m de profundidade. No limite da plataforma continental encontra-se presente um sistema de gullies que se desenvolvem ao longo do talude. Além disso a análise quantitativa dos aspetos morfológicos associados às formas de drumlin e gullies permitiu uma descrição morfológica mais detalhada, e encontrar padrões que permitiram obter mais informações sobre os fatores de controlo envolvidos durante a sua formação. A distribuição observada das diferentes morfologias identificadas é coerente com estudos anteriormente realizados e constituem uma forte evidência de que o manto de gelo teve uma extensão até ao limite da plataforma continental e que a sua dinâmica foi mais ativa do que se tem constatado.
Swath bathymetric and sub-bottom CHIRP data collected on the East Antarctica continental shelf and seaward allowed detailed mapping of the geomorphic features formed during past times of extended grounded ice from an expanded East Antarctic Ice Sheet (EAIS). Under the umbrella of the American National Science Project 'Vulnerability of East Antarctic ice shelves' and the Portuguese PROPOLAR project EAST-MARGINS, the seafloor morphology was interpreted and submitted to quantitative analyses, through morphometry and statistical analysis, to better understand the EAIS dynamic in the past. The study area included a segment of the continental shelf, slope and rise between the Frost and Dibble Glaciers (128ºE and 134ºE). The data were collected during the cruise NBP1503 in April 2015, on board the U.S. RVIB Nathaniel B. Palmer. The results revealed a continental shelf with depths varying between 300 m and 990 m. The inner and mid shelf area is characterised by a crudely streamlined landscape where subglacial meltwater channels up to 230 m deep and drumlin-like bedforms at 800-900 m water depth have been identified. Sporadic iceberg scours occur in the outer continental shelf between 380-410 m of water depth. The shelf break is defined by a gully system which extends along the continental slope, followed by sediment mounds observed on the continental rise. Moreover, quantitative analyses on drumlin-like bedforms and gullies allowed a further morphological description to better delineate patterns, and provided more details related to the controlling factors involved during their formation. The distribution of identified glacial features is coherent with other previous studies and constitutes a strong evidence that the grounded ice reached the continental shelf break in the past and was more dynamic than previously thought.
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Wise, Matthew Geoffrey. "Iceberg-keel ploughmarks on the seafloor of Antarctic continental shelves and the North Falkland Basin : implications for palaeo-glaciology." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/276147.
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The use of iceberg-keel ploughmarks as proxy indicators of past and present iceberg morphology, keel depth and drift direction has seldom been approached in the southern hemisphere. Using high-resolution multi-beam swath bathymetry of the mid-shelf Pine Island Trough and outermost Weddell Sea shelf regions of Antarctica, detailed analysis of >13,000 iceberg-keel ploughmarks was undertaken. By considering the draft of icebergs calved from Antarctica today, calculated from detailed satellite altimetric datasets by this work, almost all observed ploughmarks were interpreted to be relict features. In Pine Island Trough, ploughmark planform parameters and cross-sections imply calving of a large number of non-tabular icebergs with v-shaped keels from the palaeo-Pine Island-Thwaites ice stream. Geological evidence of ploughmark form and modern water depth distribution indicates calving-margin thicknesses (949 m) and subaerial ice cliff elevations (102 m) equivalent to the theoretical threshold predicted to trigger ice-cliff structural collapse and calving by marine ice-cliff instability (MICI) processes. Thus, ploughmarks provide the first observational evidence of rapid retreat of the palaeo-Pine Island-Thwaites ice stream, driven by MICI processes commencing ~12.3 cal ka BP. On the Weddell Sea shelf, ploughmark morphologies imply considerable variation in palaeo-iceberg shape and size, most likely reflecting calving from multiple source margins. In turn, an absence of grounded ice on the Weddell Sea shelf and a palaeo-oceanographic regime comparable to today are implied at the time of formation. Analysis of a 3D seismic cube of the Sea Lion Field area of the North Falkland Basin reveals iceberg-keel ploughmarks incised into the modern- and palaeo-seafloor, formed by icebergs of varying shape and size that most-likely calved from the Antarctic Ice Sheet during three past glacial periods (estimated ages ~18 - 26.5 ka BP, ~246 ka BP, ~9.8 Ma BP). Despite illustrating the possibility of iceberg drift into the North Falkland Basin today, the relict ploughmark age implies little risk to any seafloor structures in the area, which might be required for hydrocarbon production. By these analyses, the significance of iceberg-keel ploughmarks as indicators of palaeo-glaciology and palaeo-oceanography at the time of formation is emphasised.
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Gómez-Navarro, Laura. "Techniques de débruitage d'image pour améliorer l'observabilité de la fine échelle océanique par SWOT." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALU024.
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Les observations de la hauteur de la surface de la mer (SSH) décrivant des échelles entre 10 et 100 km sont cruciales pour mieux comprendre les transferts d'énergie et pour quantifier les échanges verticaux de chaleur et de traceurs biogéochimiques. La mission Surface Water Ocean Topography (SWOT) est un nouveau satellite altimétrique à large fauchée dont le lancement est prévu en 2022. SWOT fournira des informations sur la SSH à une résolution kilométrique, mais des incertitudes dues à diverses sources d'erreurs mettront à l'épreuve notre capacité à extraire le signal physique des structures inférieures à quelques dizaines de kilomètres. Le filtrage du bruit et des erreurs SWOT est une étape clé vers une interprétation optimale des données.L'objectif de cette étude est d'explorer des techniques de débruitage d'image afin d'évaluer les capacités des futures données SWOT à résoudre les fines échelles océaniques. Les données pseudo-SWOT sont générées avec le simulateur SWOT pour l'océanographie, qui utilise comme données d'entrée les sorties SSH des modèles de circulation générale océanique (OGCMs) à haute résolution. Plusieurs techniques de débruitage sont testées, afin de trouver celle qui rend le plus précisément les champs de SSH et de ses dérivées tout en préservant l'amplitude et la forme des structures océaniques présentes. Les techniques sont évaluées sur la base de la racine carrée de l'erreur quadratique moyenne, des spectres et d'autres diagnostiques.Au Chapitre 3, les données pseudo-SWOT pour la phase scientifique sont analysées pour évaluer les capacités de résolution de la méso et la sousmésoéchelle en Méditerranée occidentale. Une technique de débruitage par diffusion laplacienne est mise en œuvre permettant de récupérer la SSH, la vitesse géostrophique et la vorticité relative jusqu'à 40 - 60 km. Cette première étape a permis d'observer correctement la mésoéchelle, mais des améliorations sont possibles à la sousmesoéchelle, notamment pour mieux préserver l'intensité du signal SSH.Au Chapitre 4, une autre technique de débruitage est explorée dans la même région pour la phase d'échantillonnage rapide du satellite. Elle vise à retrouver adéquatement des dérivées de SSH, en récupérant leur structure et en préservant leur ampleur. Une méthode variationnelle est mise en œuvre qui peut pénaliser les dérivées de la SSH de premier, deuxième, troisième ordre ou une combinaison de ceux-ci. Le meilleur paramétrage est basé sur une pénalisation de second ordre, et nous avons trouvé les paramètres optimaux de cette configuration. Grâce à cette technique, les longueurs d'onde résolues par SWOT dans cette région sont réduites d'un facteur 2, tout en préservant l'ampleur des champs.Au Chapitre 5, nous étudions l'échelle spatiale la plus fine que SWOT pourrait résoudre après avoir débruité dans plusieurs régions, saisons et en utilisant différents OGCMs. Notre étude se concentre sur différentes régions et afin de documenter la variété des régimes que SWOT échantillonnera. L'algorithme de débruitage fonctionne bien même en présence de mouvements rapides non équilibrés intenses, et permet de réduire systématiquement la plus petite longueur d'onde résolue. Algorithmes de débruitage avancés permettent également de reconstruire de manière fiable les gradients SSH et les dérivées de second ordre. Nos résultats montrent également qu'une incertitude importante subsiste quant à l'échelle la plus fine résolue par SWOT dans une région et saison données en raison de la grande dispersion du niveau de variance estimé par nos simulations.La technique de débruitage développée, mise en œuvre et testée dans cette thèse doctorale permet de récupérer, dans certains cas, des échelles spatiales SWOT jusqu'à 15 km. Cette méthode est une contribution très utile pour atteindre les objectifs de la mission SWOT. Les résultats trouvé aideront à mieux comprendre la dynamique et les structures océaniques et leur rôle dans le système climatiqueSea Surface Height (SSH) observations describing scales in the range 10 - 100 km are crucial to better understand energy transfers across scales in the open ocean and to quantify vertical exchanges of heat and biogeochemical tracers. The Surface Water Ocean Topography (SWOT) mission is a new wide-swath altimetric satellite which is planned to be launched in 2022. SWOT will provide information on SSH at a kilometric resolution, but uncertainties due to various sources of errors will challenge our capacity to extract the physical signal of structures below a few tens of kilometers. Filtering SWOT noise and errors is a key step towards an optimal interpretation of the data.The aim of this study is to explore image de-noising techniques to assess the capabilities of the future SWOT data to resolve the oceanic fine scales. Pseudo-SWOT data are generated with the SWOT simulator for Ocean Science, which uses as input the SSH outputs from high-resolution Ocean General Circulation Models (OGCMs). Several de-noising techniques are tested, to find the one that renders the most accurate SSH and its derivatives fields while preserving the magnitude and shape of the oceanic features present. The techniques are evaluated based on the root mean square error, spectra and other diagnostics.In Chapter 3, the pseudo-SWOT data for the Science phase is analyzed to assess the capabilities of SWOT to resolve the meso- and submesoscale in the western Mediterranean. A Laplacian diffusion de-noising technique is implemented allowing to recover SSH, geostrophic velocity and relative vorticity down to 40 - 60 km. This first step allowed to adequately observe the mesoscale, but space is left for improvement at the submesoscale, specially in better preserving the intensity of the SSH signal.In Chapter 4, another de-noising technique is explored and implemented in the same region for the satellite's fast-sampling phase. This technique is motivated by recent advances in data assimilation techniques to remove spatially correlated errors based on SSH and its derivatives. It aims at retrieving accurate SSH derivatives, by recovering their structure and preserving their magnitude. A variational method is implemented which can penalize the SSH derivatives of first, second, third order or a combination of them. We find that the best parameterization is based on a second order penalization, and find the optimal parameters of this setup. Thanks to this technique the wavelengths resolved by SWOT in this region are reduced by a factor of 2, whilst preserving the magnitude of the SSH fields and its derivatives.In Chapter 5, we investigate the finest spatial scale that SWOT could resolve after de-noising in several regions, seasons and using different OGCMs. Our study focuses on different regions and seasons in order to document the variety of regimes that SWOT will sample. The de-noising algorithm performs well even in the presence of intense unbalanced motions, and it systematically reduces the smallest resolvable wavelength. Advanced de-noising algorithms also allow to reliably reconstruct SSH gradients (related to geostrophic velocities) and second order derivatives (related to geostrophic vorticity). Our results also show that a significant uncertainty remains about SWOT's finest resolved scale in a given region and season because of the large spread in the level of variance predicted among our high-resolution ocean model simulations.The de-noising technique developed, implemented and tested in this doctoral thesis allows to recover, in some cases, SWOT spatial scales as low as 15 km. This method is a very useful contribution to achieving the objectives of the SWOT mission. The results found will help better understand the ocean's dynamics and oceanic features and their role in the climate system
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Jordão, Nuno Ricardo de Oliveira. "Study of the cell surface proteome for the analysis of Parkinson’s disease associated DJ-1 mutations." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15483.
Full textAbstract:
Mestrado em Biotecnologia - Biotecnologia MolecularParkinson’s disease (PD) is a neurodegenerative disease, characterized with selective neurodegeneration and dopamine depletion. Despite most cases appear to have sporadic origin, it has been associated various monogenic mutations to the onset of a parkinsonian phenotype. DJ-1 protein is of particular interest given its neuroprotective role against oxidative stress and mitochondria impairment, and the identification of several mutations correlated with early onset PD. For this study, it were then produced two pathological mutations of DJ-1, M26I and E163K. SDS-PAGE and LC-MS/MS analysis confirmed the adequate production and purification of the both mutant proteins, and SEC-HPLC secured the structural perseverance of the mutations as homodimers, a key feature of DJ-1 essential for its biological activity. On the other hand, SH-SY5Y viability assays indicated that despite the native form protective role against oxidative stress, M26I and E163K mutations showed a compromised neuroprotective capacity. To better understand the reasons for this biological impairment, it was developed a protocol for cell surface proteins labelling with Sulfo-NHSLC-biotin and avidin pull-down for enrichment and downstream MS analysis. Assays such as western blotting, LC-MS/MS and confocal microscopy confirmed the adequacy of the proposed procedure. When applied for the analysis of proteome variations related to oxidative stress, in enriched fractions from SH-SY5Y biotinylation and avidin pull-down of crude membrane sub cellular part, it allowed the identification of several proteins of interest, namely four proteins with significant difference caused by oxidative stress induction, and of other proteins of interest. It was also performed the direct pull-down of whole protein extract, offering inconclusive results regarding the preferential use of ultracentrifugation before pull-down. Nevertheless, it was the first time that SH-SY5Y cell surface was analysed in a PD context, and it could be used in the future to study cell surface proteome alterations modulated by oxidative stress and extracellular presence of native or mutant DJ-1, providing new insights regarding its intake and signalling modulation in pathological conditions, and hence contributing for a new perspective over preventive or eliciting mechanisms associated to the onset of Parkinson’s disease.
A doença de Parkinson é uma doença neurodegenerativa caracterizada por uma neurodegeneração selectiva e depleção de dopamina, e apesar de grande parte dos casos terem origem esporádica diversas mutações monogénicas têm sido associadas ao desenvolvimento de um fenótipo parkinsoniano. A proteína DJ-1 é de particular interesse, dado o seu papel neuroprotector contra stress oxidativo e disfunção mitocondrial, e a identificação de mutações correlacionadas a doença de Parkinson precoce. Neste estudo, foram produzidas duas mutações patológicas da proteína DJ-1, M26I e E163K. Uma análise SDS-PAGE e LC-MS/MS comprovou uma produção e purificação adequada das mutações, e SEC-HPLC assegurou a preservação estrutural das mutações de DJ-1 como homodímeros, uma característica chave de DJ-1 fundamental para a sua actividade biológica. Por outro lado, estudos de viabilidade de SH-SY5Y indicaram que, apesar do papel protector da forma nativa contra stress oxidativo, as mutações M26I e E163K demonstraram uma reduzida capacidade neuroprotectiva. Para melhor compreender os motivos desta disfunção biológica, foi desenvolvido um protocolo para marcação das proteínas de superfície celular com Sulfo-NHS-LC-biotina e pull-down com avidina para enriquecimento e subsequente análise MS. Vários ensaios como western blotting, LC-MS/MS e microscopia confocal confirmaram a adequação do protocolo sugerido. Quando aplicado para uma análise de variações proteómicas relacionadas com stress oxidativo, em fracções enriquecidas provenientes da biotinilação de SH-SY5Y e pull-down da parte membranar do extracto celular, permitiu a identificação de várias proteínas de interesse, nomeadamente quatro proteínas com diferença significativa resultante da indução de stress oxidativo. Também foi realizado um pull-down com a totalidade extracto celular, que resultou em dados não conclusivos relativamente ao uso de ultracentrifugação antes do pull-down. Não obstante, este estudo correspondeu à primeira análise da superfície celular de SH-SY5Y realizada num contexto da doença de Parkinson, que poderá ser usada no futuro para estudar alterações no proteoma de superfície celular em ambiente de stress oxidativo e de adição da proteína DJ-1, na forma nativa e mutante, de forma a fornecer novas pistas referentes ao seu intake e modulação da sinalização em ambiente oxidativo, e em suma contribuindo para uma nova perspectica sobre os mecanismos protectores ou despoletadores da doença de Parkinson.
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Loureiro, Liliana Raquel Rodrigues. "DJ-1 mutants binding partners: insights into Parkinson's Disease." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12583.
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Mestrado em Biotecnologia - Biotecnologia MolecularParkinson´s disease (PD), the second most common progressive neurodegenerative disorder, is a multifactorial disease caused by both genetic and environmental factors. Among the genes associated with PD, DJ-1 is a multifunctional protein involved in oxidative stress response and neuroprotection. DJ-1 mutations, such as L166P, M26I and E163K lead to loss of protein function causing early onset autosomal recessive PD. Moreover, the residue C106 is considered crucial in DJ-1 function as a sensor of oxidative stress. In this study, one missense mutations (E163K) and two engineered mutations in the residue C106 (C106A and C106DD) were produced and characterized in order to evaluate the neuroprotective effect of each mutation and also characterize their dynamic interactome. Structural analysis confirmed the production of all the mutants in the dimeric form, with a molecular weight of approximately 43kDa. Moreover, protein´s thermal stability was assessed by thermal shift and the results showed that the mutant E163K was the less stable and the C106A the most stable. Secondary structure analysis was performed by circular dichroism and revealed similar secondary structures between DJ-1 WT and mutants. In addition, a LC-MS/MS was performed to determine proteins´ contaminants and the majority of the protein contaminants were coming from the expression system and culture medium used in proteins´ production. Moreover, neuroprotection assays revealed that DJ-1 WT did not protect SH-SY5Y cells under oxidative stress conditions. The dynamic interactome of DJ-1 WT and mutants C106DD, E163K and C106A was characterized under oxidative stress conditions. A wide number of binding partners were identified and for some of them quantification in the different conditions was also determined. These interactors have a broad range of functions but the majority are associated with cellular response to oxidative stress. The study of DJ-1 mutations is very important, since it gives elucidations into DJ-1 WT functions and related disease mechanisms. In this way, the putative DJ-1 WT interactors identified still lack validation, but from these characterized dynamic interactomes further elucidations can be obtained into Parkinson’s Disease pathology and potential new targets for PD prevention and therapy, like ATP-dependent RNA helicase DDX3X herein identified as new dynamic interactor of DJ-1.
A Doença de Parkinson, a segunda doença neurodegenerativa progressiva mais comum, é uma doença multifatorial causada conjuntamente por fatores genéticos e fatores ambientais. De entre os inúmeros genes associados à Doença de Parkinson, a DJ-1 é uma proteína multifuncional envolvida na resposta ao stress oxidativo e neuroproteção. Mutações na DJ-1, tais como L166P, M26I e E136K levam à perda de função da proteína causando a forma de Parkinson autossomal recessiva com desenvolvimento precoce. De salientar que o resíduo C106 é considerado crucial na função de sensor de stress oxidativo que a DJ-1 desempenha. Neste estudo, foram produzidas e caracterizadas duas mutações sintéticas no resíduo C106 (C106A e C106DD) e uma mutação natural (E163K) de modo a avaliar o efeito neuroprotetor de cada mutação bem como caracterizar o seu interactoma dinâmico. Análises estruturais confirmaram a produção de todos os mutantes na forma dimérica, apresentando um peso molecular de aproximadamente 43kDa. A estabilidade térmica das proteínas foi ainda avaliada por thermal shift e os resultados revelaram que o mutante E163K foi o menos estável enquanto que o mutante C106A foi o mais estável. Análise da estrutura secundária foi realizada por dicroísmo circular revelando elevada semelhança entre as estruturas secundárias da DJ-1 nativa e mutantes. Por fim, foi realizada uma análise de LC-MS/MS de modo a determinar os contaminantes das proteínas produzidas e verificou-se que a maioria dos contaminantes era proveniente do sistema de expressão e meio de cultura utilizados na produção das proteínas. Seguidamente, ensaios de neuroproteção revelaram que a DJ-1 nativa não exercia um efeito neuroprotetor nas células SH-SY5Y em condições de stress oxidativo. O interactoma dinâmico da DJ-1 nativa e mutantes C106DD, E163K e C106A foi caracterizado sob condições de stress oxidativo. Um elevado número de interactores foram identificados e para alguns deles foi possível obter uma quantificação nas diferentes condições. Os referidos interactores apresentam uma enorme variedade de funções, contudo a grande maioria está associada à resposta celular ao stress oxidativo. O estudo das mutações na DJ-1 é considerado muito relevante visto que fornece importantes elucidações relativamente às funções e mecanismos da DJ-1 nativa associados à doença. Neste sentido, os supostos interactores da DJ-1 nativa identificados ainda carecem de validação, mas da caracterização dos interactomas dinâmicos, elucidações podem ser obtidas sobre a patologia da Doença de Parkinson e identificação de novos potenciais alvos para prevenção e terapia desta doença, tal como a RNA helicase DDX3X dependente de ATP aqui identificada como novo interactor dinâmico da DJ-1.
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Crowe, Trever Gordon. "A dynamic simulation of a Versatile Model 4025 swather header." 1990. http://hdl.handle.net/1993/17171.
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Papaxanthos, Nicholas. "Heart-Shaped Fly Swatter." Thesis, 2014. http://spectrum.library.concordia.ca/978468/1/Papaxanthos_MA_S2014.pdf.
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Heart-Shaped Fly Swatter is a failed attempt at writing in the style of so-called New York School Poetry, but a successful attempt, I think, at writing towards writing in that style. It’s a failed attempt because most of these poems are planted too firmly in the ground (the page), unable to leap off into the air. Take, for example, the difference between “Heart-Shaped Fly Swatter” and “Fly-Shaped Heart Swatter”: one is easily imagined before us, as satisfying as a well-timed swat killing the bug, while the other can’t be pinned down exactly, more out of reach, momentary, and indistinct—which is more akin, I think, to the playfulness and “going on your nerve” New-York-School sensibility. I hope my poetry moves towards and eventually in this direction in the future, happily embracing uncertainties and a slippery range of meaning.
If they don’t leap off the page, perhaps these poems leap inside and around themselves. As I understand how I wrote them, they use repetition in one way or another to hold themselves together. “Cheerless and Ready for Love,” goes on a rampage of repeated diction to restrain its wild imagery; “In Preparation for the Long Awaited I Forget What” and “Infinite Digestion” are more interested in syntactical and rhythmic unity; and “Small Town” and “The Procedure” employ a narrative and/or a central theme or idea. Most of the poems in this collection fall into one of these general categories. The exception is “Noon,” an erasure, which might explain why it’s more loose and abstract. I’m excited by the first two lines: “I ran out the back of my closet. / Two people elevated the space for me.” What is holding these together? The speaker appears in both lines and the “back of my closet” becomes “the space” — but why or how two people are elevating it is the mystery, as well as the different implications of the phrases “back of my closet” and “the space,” a movement from the specific to the general, which fosters a kind of control and release in the poem, an almost unheard click in the lock that will (hopefully) eventually open for a Houdini-like escape. I think “Noon” comes closest in this collection to almost successfully resisting a kind of intelligence in which repetition isn’t the deciding factor that holds two lines together, but a mystery of difference, estrangement, and unpredictability. The rest of these poems are struggling towards that mystery. I imagine them like beginning swimmers holding on to the side of the pool: they’re kicking hard, but afraid, not fully trusting that something will hold them up if they let go.
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Shrivastava, Anand Mohan. "Moisture absorption and movement in swathed wheat plants." 1986. http://hdl.handle.net/1993/24100.
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Marcell, Wesley Tyler. "Systematic Sampling of Scanning Lidar Swaths." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7302.
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Proof of concept lidar research has, to date, examined wall-to-wall models of forest
ecosystems. While these studies have been important for verifying lidars efficacy for
forest surveys, complete coverage is likely not the most cost effective means of using
lidar as auxiliary data for operational surveys; sampling of some sort being the better
alternative. This study examines the effectiveness of sampling with high point-density
scanning lidar data and shows that systematic sampling is a better alternative to simple
random sampling. It examines the bias and mean squared error of various estimators,
and concludes that a linear-trend-based and especially an autocorrelation-assisted
variance estimator perform better than the commonly used simple random sampling
based-estimator when sampling is systematic.
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Jiang-Shie, Shenq-Fang, and 江謝勝芳. "Fin Design of SWATH Ship." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/78613354705246786588.
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碩士國立成功大學
造船工程學系研究所
85
Fin design is an integral part of the SWATH ship design task as these fins provide the vessel with the necessary stability,and damping in the vertical drection.They also further reduce the ship motion . The major purpose of this paper is provided a valid design methodology for the fixed fin of SWATH ship. In this paper,first,states the equation of ship motion and the fineffect in wave.Second,illsrates the principle of unstable of SWATH ship motion in the vertical direction and how to design the fin to keep this vesselstable in seaway.Finally,illustrate the practical fin design of SWATH 6Aship and a fuller SAWTH ship .
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Guo, Bo-Chih, and 郭柏志. "The steady hydrodynamic effect of SWATH motion." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/py6esk.
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碩士國立成功大學
造船及船舶機械工程學系碩博士班
90
In the paper, the steady and unsteady hydrodynamic problems of SWATH moving in regular waves are analyzed by using a three-dimensional potential theory and the source distribution technique. At first, let the mean wetted hull surface area be represented by source quadrilateral elements, and the source intensity and pressure distributions can be solved. Finally the steady exciting wave resistance and unsteady ship motion problems to obtain. The effects of resonance between them also included. In this paper, we focus on the transom of ship, The analytic models here developed are useful to predict the characteristic of SWATH.
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Wen, Shen Chang, and 張文賢. "Wave-Induced Vibration Analysis of A SWATH Ship." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/26292836623894005195.
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