UNDERWATER TECHNOLOGY最新文献

{"title":"North Sea talents – Today and the next generation","authors":"C. Milner","doi":"10.3723/ut.32.157","DOIUrl":"https://doi.org/10.3723/ut.32.157","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"19 1","pages":"157-158"},"PeriodicalIF":0.4,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80092343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applying the threat matrix to investigate reliability and maintainability requirements of offshore renewable energy devices","authors":"J. Baker","doi":"10.3723/UT.32.199","DOIUrl":"https://doi.org/10.3723/UT.32.199","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"21 1","pages":"199-206"},"PeriodicalIF":0.4,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84534548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Basics of Rebreather Diving","authors":"G. Anthony","doi":"10.3723/ut.32.209","DOIUrl":"https://doi.org/10.3723/ut.32.209","url":null,"abstract":"the basics of rebreather diving davelister the basics of rebreather diving vmnlaw the basics of rebreather diving scdp how to make solo rebreather diving safer x-ray mag the basics of rebreather diving tbsh the basics of rebreather diving velavita the basics of rebreather diving typeindustry the basics of rebreather diving baulucht gue fundamentals for rebreather divers tech dive nz rebreathers simplified diveseekers the basics of rebreather diving vonwiemarseck the basics of rebreather diving by jill heinerth the basics of rebreather diving by jill heinerth glossary of rebreather diving by jill heinerth rebreather diving manual padi nylahs text: brett human; photos: errol harding rebreathers chapter 2 physics of diving the basics of rebreather diving by jill heinerth the basics of rebreather diving user manuals by tetsuya the essentials of cave diving user guide for rebreather pod kirby morgan flyer rebbi 5 eng rebreather-reunion safe diving raf homepage the safety stop cojo diving the idreo training program nexus computer operation manual rebreather closed circuit rebreather exclusivdive rebreather allgemein [ 01 ] rebreather manual nitrox user manual hollis padi tecrec diving manual scdp padi tec basics diver training padi explorer escr diver raptures reward tomig why rebreather testing is important tecrec blog padi distinctive specialty: tec basics thinkblue audi tt owners manual zaraa official report castleguard cave diving expedition 2009 inshore fisheries management reprint laylys personal examples of honor flight letters beelo 10 q and a's about dir rebreather :: x-ray magazine katrina koski diving experience cave & technical diving alinea by grant achatz smar7discount the dave grohl story nirvana foo fighters tomig odyssey log schoolworld an edline solution 2 aadver plato english 2 semester answers thaba inspiration extreme diving academy parts manual butler tyre changer heeng earth science labs answer key laudit","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"23 1","pages":"209-210"},"PeriodicalIF":0.4,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84667269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experiment of free-falling cylinders in water","authors":"S. Yasseri","doi":"10.3723/UT.32.177","DOIUrl":"https://doi.org/10.3723/UT.32.177","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"44 1","pages":"177-191"},"PeriodicalIF":0.4,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86786671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subsea Optics and Imaging","authors":"R. Allwood","doi":"10.3723/ut.32.207","DOIUrl":"https://doi.org/10.3723/ut.32.207","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"25 1","pages":"207-208"},"PeriodicalIF":0.4,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81045721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of thermal and humidity management needs and feasible solutions for next generation subsea electric systems","authors":"Vedachalam Narayanaswamy","doi":"10.3723/UT.32.129","DOIUrl":"https://doi.org/10.3723/UT.32.129","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"215 1","pages":"129-143"},"PeriodicalIF":0.4,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79592851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study of hydrodynamic forces acting on artificial fish in a von Kármán vortex street","authors":"G. Toming, Lily D. Chambers, M. Kruusmaa","doi":"10.3723/UT.32.081","DOIUrl":"https://doi.org/10.3723/UT.32.081","url":null,"abstract":"The present paper describes the hydrodynamic forces acting on different sized fish-shaped objects in a von Karman vortex street, where in a wake of an object a specific locomotion pattern, Karman gaiting, is observed. The present paper investigates the hydrodynamic forces, both lateral force and torque on a passive fish-shaped body in those hydrodynamic conditions. By using a range of fish length to wake wavelengths, size matters were experimentally tested for balancing the forces on an artificial fish intercepting oncoming vortices, potentially to exploit the lateral and rotational elements in the flow that may facilitate Karman gaiting in a biological fish. To do this, five artificial fish were manufactured to mimic a rainbow trout (Oncorhynchus mykiss), were inserted into the flow tunnel and recorded simultaneously the hydrodynamic forces and DPIV images. The experimental results found that the hydrodynamic forces supporting Karman gaiting did not stop even if the body length of the fish-like object exceeded the wake wavelength. Overall, the obtained results help to understand fish and fluid interactions when swimming in the Karman vortex street.","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"15 1","pages":"81-91"},"PeriodicalIF":0.4,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87054175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A practical guide to the use of consumer-level digital still cameras for precise stereogrammetric in situ assessments in aquatic environments","authors":"Matthias Wehkamp, P. Fischer","doi":"10.3723/UT.32.111","DOIUrl":"https://doi.org/10.3723/UT.32.111","url":null,"abstract":"Scientists planning to use underwater stereoscopic image technologies are often faced with numerous problems during the methodological implementations: commercial equipment is too expensive; the setup or calibration is too complex; or the imaging processing (i.e. measuring objects in the stereo-images) is too complicated to be performed without a time-consuming phase of training and evaluation. The present paper addresses some of these problems and describes a workflow for stereoscopic measurements for marine biologists. It also provides instructions on how to assemble an underwater stereo-photographic system with two digital consumer cameras and gives step-by-step guidelines for setting up the hardware. The second part details a software procedure to correct stereo-image pairs for lens distortions, which is especially important when using cameras with non-calibrated optical units. The final part presents a guide to the process of measuring the lengths (or distances) of objects in stereoscopic image pairs. To reveal the applicability and the restrictions of the described systems and to test the effects of different types of camera (a compact camera and an SLR type), experiments were performed to determine the precision and accuracy of two generic stereo-imaging units: a diver-operated system based on two Olympus Mju 1030SW compact cameras and a cable-connected observatory system based on two Canon 1100D SLR cameras. In the simplest setup without any correction for lens distortion, the low-budget Olympus Mju 1030SW system achieved mean accuracy errors (percentage deviation of a measurement from the object’s real size) between 10.2 and –7.6% (overall mean value: –0.6%), depending on the size, orientation and distance of the measured object from the camera. With the single lens reflex (SLR) system, very similar values between 10.1% and –3.4% (overall mean value: –1.2%) were observed. Correction of the lens distortion significantly improved the mean accuracy errors of either system. Even more, system precision (spread of the accuracy) improved significantly in both systems. Neither the use of a wide-angle converter nor multiple reassembly of the system had a significant negative effect on the results. The study shows that underwater stereophotography, independent of the system, has a high potential for robust and non-destructive in situ sampling and can be used without prior specialist training.","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"33 1","pages":"111-128"},"PeriodicalIF":0.4,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77278298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Full-scale manoeuvring trials for the Wayamba unmanned underwater vehicle","authors":"D. Sgarioto, C. Madden","doi":"10.3723/UT.32.067","DOIUrl":"https://doi.org/10.3723/UT.32.067","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"43 5","pages":"67-79"},"PeriodicalIF":0.4,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3723/UT.32.067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72405180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How deep is the ocean – How high is the sky?","authors":"L. Ayling","doi":"10.3723/UT.32.065","DOIUrl":"https://doi.org/10.3723/UT.32.065","url":null,"abstract":"","PeriodicalId":44271,"journal":{"name":"UNDERWATER TECHNOLOGY","volume":"26 1","pages":"65-66"},"PeriodicalIF":0.4,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76836305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}