نتایج جستجو برای: rov
تعداد نتایج: 664 فیلتر نتایج به سال:
The Resource Public Key Infrastructure (RPKI) binds IP address blocks to owners’ public keys. RPKI enables routers to perform Route Origin Validation (ROV), thus preventing devastating attacks such as IP prefix hijacking. Yet, despite extensive effort, RPKI’s deployment is frustratingly sluggish, leaving the Internet largely insecure. We tackle fundamental questions regarding today’s RPKI’s dep...
Rotavirus (RoV) and Norovirus (NoV) are the main causes of viral gastroenteritis. Currently, there is no validated multiplex real-time PCR that can detect and quantify RoV and NoV simultaneously. The aim of the study was to develop, validate, and internally control a multiplex one-step RT real-time PCR to detect and quantify RoV and NoV in stool samples. PCR sensitivity was assessed by comparin...
A key issue facing any ROV or AUV-based benthic visual survey is how to point the camera normal to the terrain during the survey. Though planar terrain surveys can be executed using a constant camera orientation, non-planar terrain surveys require that the commanded camera orientation change during vehicle movement.. This paper proposes a method that generates a smooth camera orientation comman...
The study utilises two emerging low-cost technologies, low cost Remotely Operated Vehicle (ROV) and underwater photogrammetry techniques (Structure from motion (SfM)) using off the shelf cameras, for 3D reconstruction of shallow hydrothermal vent sites around Paleochori Bay, Milos Island, Greece. Venting fields were Characterised through interactive bathymetry models produced from still images ...
Four non-invasive methods (three acoustic and one video) were compared to estimate the abundance and vertical distribution of scyphomedusae, using the locally abundant coronate species Periphylla periphylla in Lurefjorden, north of Bergen, Norway, as the test organism. The acoustic methods included single-target quantification by, respectively, a hull-mounted 38 kHz split-beam echo sounder and ...
Alireza Marzbanrad Shiraz University,School of Mechanical Engineering Shiraz, Iran Jalil Sharafi K. N. Toosi University of Technology, Department of Systems and Control Tehran, Iran Mohammad Eghtesad Shiraz University,School of Mechanical Engineering Shiraz, Iran Reza Kamali Shiraz University,School of Mechanical Engineering Shiraz, Iran ABSTRACT This is report of design, construction and contr...
The operation of a ROV requires significant off-shore dedicated manpower to handle and operate the robotic platform. In order to reduce the burden of operations, DexROV proposes to work out more cost effective and time efficient ROV operations, where manned support is in a large extent delocalized onshore (i.e. from a ROV control center), possibly at a large distance from the actual operations,...
Underwater remotely operated vehicles (ROVs) play an important role in a number of shallow and deepwater missions for marine science, oil and gas extraction, exploration and salvage. In these applications, the motions of the ROV are guided either by a human pilot on a surface support vessel through an umbilical cord providing power and telemetry, or by an automatic pilot. In the case of automat...
Combined Autonomous Surface Vehicles (ASV) and remotely operated underwater vehicles (ROV) inspection intervention systems can contribute to future asset management of offshore renewable energy. This paper presents the design performance winch system which couples ASV ROV deploys/recovers ROV. The hydrodynamic models control algorithms are developed solved with analytical numerical approaches. ...
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