Academic literature on the topic 'Swather'

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Journal articles on the topic "Swather"

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Pearson, Calvin H. "An Updated, Automated Commercial Swather for Harvesting Forage Plots." Agronomy Journal 99, no. 5 (September 2007): 1382–88. http://dx.doi.org/10.2134/agronj2007.0069n.

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Paraforos, Dimitris S., Hans W. Griepentrog, Stavros G. Vougioukas, and Dietrich Kortenbruck. "Fatigue life assessment of a four-rotor swather based on rainflow cycle counting." Biosystems Engineering 127 (November 2014): 1–10. http://dx.doi.org/10.1016/j.biosystemseng.2014.08.006.

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Paraforos, Dimitris S., and Hans W. Griepentrog. "Switching Markov chains for modelling the loads of a four-rotor swather under different operating modes." IFAC-PapersOnLine 50, no. 1 (July 2017): 5392–97. http://dx.doi.org/10.1016/j.ifacol.2017.08.1072.

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Karn, J. F., D. L. Tanaka, M. A. Liebig, R. E. Ries, S. L. Kronberg, and J. D. Hanson. "An integrated approach to crop/livestock systems: Wintering beef cows on swathed crops." Renewable Agriculture and Food Systems 20, no. 4 (December 2005): 232–42. http://dx.doi.org/10.1079/raf2005108.

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AbstractGrain and livestock production have gradually been separated, as farmers have tended to specialize in one or the other. Some producers and scientists are beginning to question whether this is the best approach. An integrated crop/livestock project was initiated in 1999 to investigate potentially beneficial synergies to both enterprises. The cattle portion of this project involved wintering dry pregnant cows on swathed crop residue and drilled corn produced in a 3-year crop rotation, with all crops present each year. Swath grazing was initiated in mid-November of 1999, 2000 and 2001, and terminated in mid-February each year. Two replications of ten Hereford cows were rotationally grazed on swathed oat/pea and triticale crop residue and swathed drilled corn (RGSC). Comparison treatments were: cows grazing swathed western wheatgrass (SWWG) and cows fed hay in a drylot. Cows on the RGSC treatment were also fed a 20% crude protein supplement of oat/pea and triticale grain. Drilled corn was swathed in late September and western wheatgrass in early October. Three-year average winter-long weight gains for the RGSC cows were slightly lower (P<0.10) than those for drylot cows. Body condition scores generally followed the same pattern as weight gain data. Reproductive and calf performance data were not significantly different among wintering treatments. Average daily feed costs per cow over the three winters were US$0.49, 0.65 and 0.73 for RGSC, SWWG and baled hay in a drylot, respectively, providing a potential daily savings of US$0.24 per cow with the RGSC treatment compared to bale feeding in a drylot. Swath grazing did not appear to have any adverse affects on mid-aged beef cow performance and could potentially reduce winter feeding costs and manure handling problems. The main problem with swath grazing is potentially deep snow and icing of the swaths.
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Lamond, W. J., H. B. Spencer, R. Graham, and A. B. Moore. "Effect of thin layer drying rate and swath architecture on the rate of grass swath drying under controlled conditions." Journal of Agricultural Science 113, no. 1 (August 1989): 59–65. http://dx.doi.org/10.1017/s0021859600084616.

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SUMMARYA total of 51 grass swaths was dried in a wind tunnel under controlled conditions of temperature and humidity. The swath treatments covered a range of conditioning treatments, crop types, maturities and porosities. Drying rates of the swaths were related to crop and swath properties to establish which variables were important in influencing the overall drying rates of the swaths. Multiple regression analysis was used to assess the statistical dependence of drying rate on variables reflecting crop and swath properties: the dependence on swath structure was approximately four times greater than the dependence on crop conditioning. Improved swath drying rates could be achieved by lesssophisticated machinery than the current mower conditioners.
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Brennan, R. F., M. D. A. Bolland, and J. W. Bowden. "Potassium deficiency, and molybdenum deficiency and aluminium toxicity due to soil acidification, have become problems for cropping sandy soils in south-western Australia." Australian Journal of Experimental Agriculture 44, no. 10 (2004): 1031. http://dx.doi.org/10.1071/ea03138.

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Nutrient omission experiments determined the cause of ‘waves’ of good and bad growth in wheat and barley crops following burning of swathed canola crop residues on acidified sandy soils in south-western Australia. Potassium deficiency, and molybdenum deficiency and aluminium toxicity induced by soil acidification, were identified as major problems. Burning canola swaths increased bicarbonate-extractable soil potassium by 20–100 mg/kg, and as measured in 0.01 mol/L CaCl2, increased soil pH by 0.3–0.8 of a pH unit and decreased aluminium extracted from soil by 1–6 mg/kg. These changes in soil chemistry were shown to be responsible for waves of better crop growth under the burnt swaths. Root lesion nematodes were shown not to be related to the problem.
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Zhen, Chun Bo, Liang Feng, Guo Chun Lu, and Yuan Hang Hou. "Global Structure Strength Analysis of SWATH Based on Direct Calculate Method." Applied Mechanics and Materials 633-634 (September 2014): 1002–6. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.1002.

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The stress concentration of SWATH’s cross-deck structure is serious and the problem of its structure strength appears particularly important. In this paper, A 3-D global element model of SWATH was built, the design Loads, load cases and boundary conditions were studied. on the base of that, the structure response analysis was completed. The result show that the global ship’s stress is small in all load cases of head seas and oblique seas, and the bulkheads have serious stress concentration phenomenon in beam seas.The result can offer the reference for SWATH’s design and development.
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Colarco, P. R., L. A. Remer, R. A. Kahn, R. C. Levy, and E. J. Welton. "Implications of satellite swath width on global aerosol optical thickness statistics." Atmospheric Measurement Techniques Discussions 5, no. 2 (April 12, 2012): 2795–820. http://dx.doi.org/10.5194/amtd-5-2795-2012.

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Abstract. We assess the impact of swath width on the statistics of aerosol optical thickness (AOT) retrieved by satellite, as inferred from observations made by the Moderate Resolution Imaging Spectroradiometer (MODIS). Using collocated AERONET sun photometer observations we develop a correction to the MODIS data to account for calibration and algorithmic view angle dependency in the retrieved AOT. We sub-sample and correct the AOT data from the MODIS Aqua instrument along several candidate swaths of various widths for the years 2003–2011. We find that over ocean the global, annual mean AOT is within ± 0.01 of the full swath AOT for all of our sub-samples. Over land, however, most of our sub-samples are outside of this criterion range in the global, annual mean. Moreover, at smaller spatial and temporal scales we find wide deviation in the sub-sample AOT relative to the full swath over both land and ocean. In all, the sub-sample AOT is within ± 0.01 of the full swath value less than 25% of the time over land, and less than 50% of the time over ocean (less than 35% for all but the widest of our sub-sample swaths). These results suggest that future aerosol satellite missions having only narrow swath views may not sample the true AOT distribution sufficiently to reduce significantly the uncertainty in aerosol direct forcing of climate.
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Haberlie, Alex M., and Walker S. Ashley. "A Method for Identifying Midlatitude Mesoscale Convective Systems in Radar Mosaics. Part II: Tracking." Journal of Applied Meteorology and Climatology 57, no. 7 (July 2018): 1599–621. http://dx.doi.org/10.1175/jamc-d-17-0294.1.

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AbstractThis research is Part II of a two-part study that evaluates the ability of image-processing and select machine-learning algorithms to detect, classify, and track midlatitude mesoscale convective systems (MCSs) in radar-reflectivity images for the conterminous United States. This paper focuses on the tracking portion of this framework. Tracking is completed through a two-step process using slice (snapshots of instantaneous MCS intensity) data generated in Part I. The first step is to perform spatiotemporal matching, which associates slices through temporally adjacent radar-reflectivity images to generate swaths, or storm tracks. When multiple slices are found to be matches, a difference-minimization procedure is used to associate the most similar slice with the existing swath. Once this step is completed, a second step combines swaths that are spatiotemporally close. Tracking performance is assessed by calculating select metrics for all available swath-building perturbations to determine the optimal approach in tracking. Frequency maps and time series generated from the swaths suggest that the spatiotemporal occurrence of these swaths is reasonable as determined from previous work. Further, these events exhibit a diurnal cycle that is distinct from that of overall convection for the conterminous United States. Last, machine-learning predictions are found to limit areas of high MCS frequency to the central and eastern Great Plains.
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Calvache Ramírez, Miguel, and Oscar Raúl García Baquero. "Analysis for use coastguard Offshore Platforms or SWATH Patrol Vessels in the Colombian Pacific Ocean." Ciencia y tecnología de buques 14, no. 28 (January 31, 2021): 19–30. http://dx.doi.org/10.25043/19098642.212.

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The average cocaine seizure rate of coast guard operations in the Colombian Pacific can be improved. To enhance this indicator, detection and interdiction must be improved. Therefore, the option of using an offshore platform with better detection means, and several Rapid Reasponse Units (RRUs) stationed offshore, is being analyzed. As a result, offshore platforms are neither feasible nor viable due to the depth of the sea floor (> 2 km), but SWATH platforms can be used. The parametric design of two SWATHs is performed and an operational evaluation is made of the different current units and SWATHs. The operational evaluation of the different current units and the proposed SWATHs is carried out and contrasted with their acquisition and life cycle cost, showing that the SWATHs have a better efficiency/cost ratio. Therefore, they can be considered as an alternative to improve the efficiency of cocaine seizures and other coast guard operations.
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Dissertations / Theses on the topic "Swather"

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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.
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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
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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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Books on the topic "Swather"

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Fly Guy vs. the fly swatter. New York: Cartwheel Books, 2011.

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Carpenter, Marie. From swatches to sweaters. Baton Rouge, La. (P.O. Box 14886, Baton Rouge 70898): Knitting Know-How, 1986.

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Maharaja Swathi Thirunal. New Delhi: National Book Trust, India, 1986.

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Cooper, Marva. So beautiful de swatches: Poems. Hampton, Va: United Brothers & Sisters Communications Systems, 1991.

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The fly swatter: How my grandfather made his way in the world. New York: Pantheon Books, 2002.

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Collyer, Bret M. Swathin' in the nude: A collection of cowboy poetry. Salida, CO: Collyer Creations, 2000.

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Adler, Dorsey Sitley. Swatches: A sourcebook of patterns with more than 600 fabric designs. New York: Stewart, Tabori & Chang, 2005.

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Antonetto, Marco. Swatcher: The Swatch handbook '92 : Marco Antonetto and Marco Donnini = Swatch catalogati con quotazio ni di mercato. Milano: Auritempore Edizioni, 1991.

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author, Ranjitkar Rohit K., Kathmandu Valley Preservation Trust, and Nepal Purātattva Vibhāga, eds. Radha Krishna temple, Swatha Tol, Patan: Historic structures report, March 1992. Kathmandu: Kathmandu Valley Preservation Trust in collaboration with His Majesty's Government, Dept. of Archaeology, 2013.

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Emma, King, ed. Exploring color in knitting: Techniques, swatches, and projects to expand your knitting horizons. Hauppage, NY: Barron's Educational Series, 2011.

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Book chapters on the topic "Swather"

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Beaman, Robin J. "Swathe Mapping." In Encyclopedia of Modern Coral Reefs, 1067–70. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-2639-2_154.

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Cloet, R. L., and C. R. Edwards. "The Bathymetric Swathe Sounding System." In Oceanology, 401–13. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4205-9_44.

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Rodriguez, Ernesto, Daniel Esteban Fernandez, Eva Peral, Curtis W. Chen, Jan-Willem De Bleser, and Brent Williams. "Wide-Swath Altimetry." In Satellite Altimetry over Oceans and Land Surfaces, 71–112. Boca Raton, FL : Taylor & Francis, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315151779-2.

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Cloet, R. L., and C. R. Edwards. "A Quality Control Index for Swathe Sounding Data." In Oceanology ’88, 9–18. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1301-1_2.

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Hummel, John W., and Kenneth E. Von Qualen. "Machine Vision Swath Guidance." In Proceedings of Soil Specific Crop Management, 359. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1993.soilspecificcrop.c35.

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Chantada-Vázquez, Maria del Pilar, María García Vence, Antonio Serna, Cristina Núñez, and Susana B. Bravo. "SWATH-MS Protocols in Human Diseases." In Shotgun Proteomics, 105–41. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1178-4_7.

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Hawthorne, Christopher. "Contemporary Voice: Thickets of Diversity, Swaths of Emptyness." In A Companion to Los Angeles, 479–93. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444390964.ch25.

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Zvaigzne, Andrejs, and Oleksandr Bondarenko. "Efficiency Analysis of a Small Universal Platform Type SWATH." In Lecture Notes in Networks and Systems, 176–86. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44610-9_18.

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Krisp, Christoph, and Mark P. Molloy. "SWATH Mass Spectrometry for Proteomics of Non-Depleted Plasma." In Methods in Molecular Biology, 373–83. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7057-5_25.

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Zuo, Weihua, Rui Min, and Jin Li. "A Novel High-Resolution Wide-Swath SAR Imaging Algorithm." In Lecture Notes in Electrical Engineering, 217–24. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5803-6_22.

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Conference papers on the topic "Swather"

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"Swather Time and Motion Study for Bio-feedstocks: Preliminary Results." In 2015 ASABE International Meeting. American Society of Agricultural and Biological Engineers, 2015. http://dx.doi.org/10.13031/aim.20152189798.

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Hwang, Chanmi G. "On-Demand Swatcher Coat." In Pivoting for the Pandemic. Iowa State University Digital Press, 2020. http://dx.doi.org/10.31274/itaa.11816.

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Cloet, R., and C. Edwards. "The Bathyscan Precision Swathe Sounder." In 1986 OCEANS. IEEE, 1986. http://dx.doi.org/10.1109/oceans.1986.1160560.

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Qian, Peng, Hong Yi, and Yinghui Li. "Hydrodynamic Performance of an S-SWATH Ship in Calm Water and Waves." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24100.

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An unconventional SWATH (Small-Waterplane-Area-Twin-Hull) ship is introduced, named S-SWATH, which is a catamaran with twin hulls that are slightly curved in an S-form and arranged at a mean yaw angle but mirror symmetric to their common longitudinal center plane. Based on the “shallow-channel superconductivity” theory, proposed by Chen and Sharma, in this paper a more accurate viscous flow theory, solving the Reynolds-averaged Navier–Stokes equations (or RANS equations), is used to study the hydrodynamic performance of the S-SWATH ship. The simulation results of calm-water resistance and motions in waves are presented. In comparison with a benchmark conventional SWATH ship, which features a typical torpedo-shaped body, the simulation results prove the effectiveness of the S-shape design. On one hand, the S-SWATH ship inherits the major advantages of SWATH ships, such as the superior ride quality, acceptable acceleration levels for human habitability and therefore comfort and overall superior seakeeping characteristics. On the other hand, the S-SWATH ship has much less low-speed drag than its conventional SWATH counterpart, and comparable total drag at high speeds.
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Brizzolara, S., G. Vernengo, L. Bonfiglio, and D. Bruzzone. "Comparative Performance of Optimum High Speed SWATH and Semi-SWATH in Calm Water and in Waves." In SNAME 5th World Maritime Technology Conference. SNAME, 2015. http://dx.doi.org/10.5957/wmtc-2015-258.

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The hydrodynamic performance of unconventional SWATH and Semi-SWATH for high speed applications are analyzed and compared in this paper. Bare hull resistance in calm water is estimated by an inviscid boundary element method with viscous corrections and verified by a fully turbulent, multiphase unsteady RANSE solver. Motions response in head waves, calculated by a frequency domain 3D panel method with forward speed effects are also evaluated and compared. Both considered hulls are the best designs coming from full parametric hull form optimization procedures, based on CFD solvers for the estimation of their hydrodynamic performance and driven by evolutionary minimization algorithms. The SWATH has twin parabolic struts and an unconventional underwater shape, the semi-SWATH has a slender triangular waterline, a bulbous shape in the entrance body which gradually morph into a U-section with a shallow transom in the run body. In general, as expected, the Semi-SWATH hull shows a lower drag at high speeds while the single strut SWATH is superior at lower speeds. As regards seakeeping, the SWATH shows unbeatable lower pitch and heave motions in shorter waves, where the Semi-SWATH evidences a double peaked RAO. More detailed analysis and conclusion are drawn in the paper.
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Daniels, D. J. "Wide swathe multi-channel GPR systems for mine detection." In 2002 International Radar Conference (Radar 2002). IEE, 2002. http://dx.doi.org/10.1049/cp:20020279.

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Kol, Marnix, Huibert-Jan Lekkerkerk, Eric Peeters, René Roels, and Tjebbe Westerbeek. "Determining rock quantities using swathe techniques on Maasvlakte 2." In Hydro12 - Taking care of the sea. Hydrographic Society Benelux, 2012. http://dx.doi.org/10.3990/2.249.

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8

Prata Vieira, Daniel, Fabio Tadao Matsumoto, Edgard Borges Malta, Kazuo Nishimoto, and Eduardo Marc¸al Vilamea. "Parametric Comfort Analysis of a Standard Swath Vessel." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20161.

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A parametric analysis which investigates the effects of the hull main dimensions on the seakeeping comfort was proposed to improve a standard SWATH vessel. This study was numerically carried out involving some comfort parameters and worldwide sea conditions. Some types of SWATH and their non-dimensional ratios were considered. The main dimensions of a standard SWATH vessel are: length (L), beam (B), pontoons radius (R), draft (T) and strut thickness (t). Some secondary dimensions were assumed so that a parametric model of wet surface could be designed using MULTISURF, which later was used on WAMIT to evaluate the hydrodynamics coefficients. The TPN receives these coefficients as a basic tool to provide the dynamic response of each SWATH case. The parametric comfort analysis was performed using three usual methodologies applied to evaluate the ship behavior: The ISO2631/3 Severe Discomfort, the MSI (Motion Sickness Incidence) and the VI (Vomiting Incidence).
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Yoshida, Motoki, Hajime Kihara, Hidetsugu Iwashita, Hiroshi Itakura, Weiguang Bao, and Takeshi Kinoshita. "The Effect of Controlling Fins on the Motion of Resonance-Free SWATH (RFS) Platform." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20275.

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The speed reduction, additional resistance or slamming, which are caused by the large amplitude of ship motions, should be restricted completely for oceangoing large fast ship, because of the strict time-punctuality and high value of the cargo. In the present work, comparison of seaworthiness, such as the motion responses in head seas, is made among four types of ship hulls, i.e. Mono-hull, Ordinary SWATH, Trimaran and Resonance-Free SWATH (RFS). The last one can be regarded as a special type of catamaran. As a result of the extremely small water plane, the restoring moments are negative for RFS hull, which leads to free of resonance in the motion responses. Experiments in towing tank and theoretical calculations are carried out to examine the motion responses in waves. Calculations are generally based on potential theory modified by adding the viscous effects and including fin lifts. The results of the motion responses of RFS are compared with those of mono-hull ship, ordinary SWATH ship as well as trimaran ship. Where the motion of RFS is controlled using movable small underwater fins. The motion of ordinary SWATH is examined with and without fin control. It can be seen that the heave motion responses of RFS are very small in comparison with those of other ship hulls. Also, the pitch motion responses of RFS are much smaller than those of mono-hull or trimaran or ordinary SWATH without fin control, and are smaller than those of ordinary SWATH with fin control. Fin control actions, i.e. proportional and derivative control, are applied in the experiments and calculations. It is considered that the derivative control action is more effective on the motion responses of RFS than the proportional one as predicted. The larger the derivative gain value is, the smaller the motion response of RFS is.
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Henry, B. B., K. J. Figes, and P. Dunaud. "Swath Single Role Minehunter." In Warship 89 - Mine Warfare Vessels and Systems. RINA, 1989. http://dx.doi.org/10.3940/rina.warship.1989.32.

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Reports on the topic "Swather"

1

Courtney, R., G. Sonnichsen, and R. Parrott. Hibernia swath bathymetry. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/184213.

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Adair, M. The CCRS Quicklook Swath Browser. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/219632.

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Adair, M. The CCRS Quicklook Swath Browser. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/219646.

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4

Flood, Roger D., Charles A. Nittrouer, and Larry Mayer. A Shallow-Water Swath Bathymetry System. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada609745.

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Zarnick, Ernest E. Prediction of SWATH Cross-Structure Slamming Pressures. Fort Belvoir, VA: Defense Technical Information Center, September 1987. http://dx.doi.org/10.21236/ada188016.

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Courtney, R. C. Inner Scotian Shelf off Halifax: EM100 swath bathymetry. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193501.

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Currie, R. G., and D. C. Mosher. Swath bathymetric surveys in the Strait of Georgia, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207871.

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Sonnichsen, G. V., and L. M. Lussier. Swath baythymetric surveys, northeastern Grand Bank: CSS Matthew 96-011. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/208510.

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Jackson, L. E., R. L. Hermanns, C. E. Jermyn, K. Conway, and R. Kung. Annotated images of submarine landslides and related features generated from Swath multibeam bathymetry, Howe Sound, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2008. http://dx.doi.org/10.4095/225109.

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Sen, Aditi, and Nafkote Dabi. Tightening the Net: Net zero climate targets – implications for land and food equity. Oxfam, August 2021. http://dx.doi.org/10.21201/2021.7796.

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Many governments and companies are adopting net zero climate targets as they recognize the urgency of the climate crisis. Without clear definition, however, these targets risk being reliant on using vast swathes of land in low-income countries to capture carbon emissions, allowing the biggest emitters to avoid making significant cuts in their own emissions. ‘Net zero’ could end up being a dangerous distraction that could delay the rapid reductions in emissions that high-emitting countries and companies need to make if we are to avoid catastrophic climate breakdown. It could also lead to an explosion in demand for land which, if not subject to careful safeguards, might risk increasing hunger and fuelling land inequality. Net zero should be a pathway to real and transformative climate action and not greenwash. Carbon emissions need to be reduced now, and land-based climate solutions must centre ‘food-first’ approaches that help achieve both zero emissions and zero hunger.
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