Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Presented Posters and Abstracts (13)
- Conference Papers (10)
- Remotely operated vehicles (9)
- Underwater vehicles (8)
- Patents (7)
-
- Popular Articles (6)
- Oceanographic techniques (5)
- Navigation (4)
- Optical imaging (4)
- Underwater acoustics (4)
- AUV (3)
- Articles (3)
- Bathymetry (3)
- Invited Talks (3)
- Oceanographic equipment (3)
- Optical sensors (3)
- Software Architecture (3)
- Software Methods (3)
- Sonar navigation (3)
- Testing (3)
- Acoustic distortion (2)
- Acoustic mapping (2)
- Acoustic sensors (2)
- Agile & Lean (2)
- Architecture (2)
- Books (2)
- Cameras (2)
- Error analysis (2)
- Marine vehicles (2)
- Microbathymetric mapping (2)
- Publication Year
Articles 31 - 60 of 85
Full-Text Articles in Engineering
Reputationnet: A Reputation Engine To Enhance Servicemap By Recommending Trusted Services, Jinhui Yao, Wei Tan, Surya Nepal, Shiping Chen, Jia Zhang, David De Roure, Carole Goble
Reputationnet: A Reputation Engine To Enhance Servicemap By Recommending Trusted Services, Jinhui Yao, Wei Tan, Surya Nepal, Shiping Chen, Jia Zhang, David De Roure, Carole Goble
Jia Zhang
The concept of Service Oriented Architecture (SOA) enables flexible and dynamic collaborations among different service providers. Backed up by SOA, scientific workflows can bring together various scientific computing tools and resources all offered as services to answer complex research questions. However, studies conducted on myExperiment show that although the sharing of service-based capabilities opens a gateway to resource reuse, in practice, the degree of reuse is very low. This motivates us to propose ServiceMap to provide navigation support through the network of services in building scientific workflows. In this paper, we propose an extension of ServiceMap, i.e., ReputationNet that incorporates …
From Agile Methods To Lean Practices: Trends In Software Development, Cécile Péraire
From Agile Methods To Lean Practices: Trends In Software Development, Cécile Péraire
Cécile Péraire
No abstract provided.
New Frontiers In Ocean Exploration: The 2010 And 2011 E/V Nautilus Field Seasons, K. Bell, R. Ballard, D. Coleman, C. Roman, M. Brennan
New Frontiers In Ocean Exploration: The 2010 And 2011 E/V Nautilus Field Seasons, K. Bell, R. Ballard, D. Coleman, C. Roman, M. Brennan
Christopher N. Roman
The Exploration Vessel NAUTILUS is creating a focus of international leadership for the development and integration of leading-edge technologies, educational programs, field operations, and public outreach programs for ocean exploration, in partnership with NOAA, National Geographic Society, Office of Naval Research, Sea Research Foundation and other sponsors. To do so, the program uses a complement of deep submergence vehicle systems and telepresence technologies to engage scientists, educators and the public, both at sea and ashore, allowing them to become integral members of the on-board exploration team. Two four-month field seasons were undertaken aboard NAUTILUS (2010-2011) to the Black, Aegean and …
An Air-Sea Flux Experiment For 2030, P. Cornillon, D. Farmer, C. Roman, I. Ginis, S. Grilli
An Air-Sea Flux Experiment For 2030, P. Cornillon, D. Farmer, C. Roman, I. Ginis, S. Grilli
Christopher N. Roman
In January 2011 the University of Rhode Island held a two day retreat for faculty and research scientists interested in where the field is going over the next 20 years. The retreat began with presentations detailing the current status and anticipated advances in genetics, nanotechnology, numerical modeling and robotics. Participants then outlined scientific problems that they expect will exist in 2030. This was followed by breakout sessions in which participants discussed experiments, based on anticipated technological advances, that might be undertaken in the 2030 time frame to address some of the identified problems. In this presentation we outline one of …
Perfil Formativo Generado En Los Entornos Cscl: Un Estudio De Caso, Ivan Jorrín Abellán
Perfil Formativo Generado En Los Entornos Cscl: Un Estudio De Caso, Ivan Jorrín Abellán
Ivan M. Jorrín Abellán
En este trabajo se presenta el "Perfil Formativo aplicable a espacios de enseñanza-aprendizaje CSCL (Computer Supported Collaborative Learning)" que ha emergido del estudio profundo de la asignatura de Arquitectura de Ordenadores de 4º Curso de la titulación de Ingeniería en Telecomunicación en la Universidad de Valladolid durante cuatro cursos académicos. Esta tesis doctoral plantea un conjunto de recomendaciones prácticas experienciales que los practicantes de este tipo de ambientes colaborativos pueden aplicar a sus procesos de diseño y puesta en práctica de espacios CSCL. Del estudio de caso analizado emergen también una propuesta de esquema de diseño de espacios CSCL, y …
New Frontiers In Ocean Exploration: The 2011 E/V Nautilus Field Season, K. Bell, R. Ballard, D. Coleman, C. Roman, M. Brennan, T. Turanli, M. Duman, S. Carey, P. Nomikou, M. Marani, M. Rosi, J. Austin, M. Canals, J. Karson, L. Mayer, Y. Makovsky
New Frontiers In Ocean Exploration: The 2011 E/V Nautilus Field Season, K. Bell, R. Ballard, D. Coleman, C. Roman, M. Brennan, T. Turanli, M. Duman, S. Carey, P. Nomikou, M. Marani, M. Rosi, J. Austin, M. Canals, J. Karson, L. Mayer, Y. Makovsky
Christopher N. Roman
In the summer of 2011, the Exploration Vessel NAUTILUS is undertaking a four-month expedition to the Black, Aegean and Mediterranean Seas, and North Atlantic Ocean. The primary goal of the NAUTILUS is to create a focus of international leadership for the development and integration of leading-edge technologies, educational programs, field operations, and public outreach programs for ocean exploration, in partnership with NOAA, National Geographic Society, Office of Naval Research, and other sponsors. To do so, the program uses a complement of deep submergence vehicle systems and “telepresence” technologies to engage scientists, educators and the public, both at sea and ashore, …
High Resolution Sea Floor Bathymetry Using High Frequency Multibeam Sonar And Structured Light Laser Imaging, C. Roman, G. Inglis, C. Smart, I. Vaughn, S. Carey
High Resolution Sea Floor Bathymetry Using High Frequency Multibeam Sonar And Structured Light Laser Imaging, C. Roman, G. Inglis, C. Smart, I. Vaughn, S. Carey
Christopher N. Roman
Detailed bathymetric maps of the sea floor with centimeter level resolution can be produced by underwater vehicles using multibeam sonars and structured light laser imaging. Over spatial scales up to tens of thousands of square meters it is possible to produce maps gridded to sub centimeter levels. This level of accuracy demands detailed treatments of the sensor relative data, the vehicle navigation data and the vehicle to sensor position and rotational offsets. The presented results will show comparisons between these two sensor modalities. Data have a been collected during recent field programs to the Kolumbo volcanic crater and the Southern …
Data Center Recovery Best Practices: Before, During, And After Disaster Recovery Execution, Heather M. Brotherton
Data Center Recovery Best Practices: Before, During, And After Disaster Recovery Execution, Heather M. Brotherton
Heather M Brotherton
This qualitative multiple case study analysis reviews well documented past information technology disasters with a goal of identifying practical before, during, and after disaster recovery best practices. The topic of cyberinfrastructure resiliency is explored including barriers to cyberinfrastructure resiliency. Factors explored include: adherence to established procedures, staff training in recovery procedures, chain of command structure, recovery time and cost, and mutual aid relationships. Helpful tools and resources are included to assist planners.
Pre-Eruption Pressure, Temperature And Volatile Content Of Rhyolite Magma From The 1650 Ad Eruption Of Kolumbo Submarine Volcano, Greece, K. Cantner, S. Carey, H. Sigurdsson, G. Vougioukalakis, P. Nomikou, C. Roman, K. Bell, M. Alexandri
Pre-Eruption Pressure, Temperature And Volatile Content Of Rhyolite Magma From The 1650 Ad Eruption Of Kolumbo Submarine Volcano, Greece, K. Cantner, S. Carey, H. Sigurdsson, G. Vougioukalakis, P. Nomikou, C. Roman, K. Bell, M. Alexandri
Christopher N. Roman
Biotite-bearing, crystal-poor rhyolite magma was the predominant magma type discharged during the 1650 AD explosive eruption of Kolumbo submarine volcano, Greece. The eruption produced thick sequences of pumice deposits (~100 m) in the upper crater walls of the volcano, but also led to the formation of extensive pumice rafts that were dispersed throughout the southern Aegean Sea, and subaerial tephra fallout as far east as Turkey. Preliminary estimates of pre-eruption volatile contents have been determined using the volatile-by-difference method on plagioclase-hosted melt inclusions and yield an average value of 6.0 wt.%. This corresponds to a pre-eruption storage pressure of 180 …
Constrained Stereo Correspondence For 3d Sea-Floor Reconstruction, Gabrielle Inglis, Chris Roman
Constrained Stereo Correspondence For 3d Sea-Floor Reconstruction, Gabrielle Inglis, Chris Roman
Christopher N. Roman
No abstract provided.
Embedded Systems As Datacenters, Robert Iannucci
Embedded Systems As Datacenters, Robert Iannucci
Robert A Iannucci
No abstract provided.
Investigation Of Stun Guns As Intentional Electromagnetic Interference (Emi) Sources, George H. Baker, Ryan C. Tuttle
Investigation Of Stun Guns As Intentional Electromagnetic Interference (Emi) Sources, George H. Baker, Ryan C. Tuttle
George H Baker
Determined malefactors have demonstrated the use of common systems as effective weapons against civilian infrastructures, e.g. commercial jetliners used as kinetic weapons and cell phones used to trigger explosive devices. This undergraduate research project investigated the possibility of using readily available stun gun devices for electro-magnetic interference with or disruption of personal computers. At present, the system effects of high power electromagnetic sources are well recognized by world scientific and military communities. Former CIA Director John Deutch has said that, "the electron is the ultimate precision-guided weapon."1 There has been much research on the deleterious effects of pulsed voltages and …
High-Resolution Optical Imaging For Deep-Water Archaeology, Hanumant Singh, Christopher Roman, Oscar Pizarro, Brendan Foley, Ryan Eustice, Ali Can
High-Resolution Optical Imaging For Deep-Water Archaeology, Hanumant Singh, Christopher Roman, Oscar Pizarro, Brendan Foley, Ryan Eustice, Ali Can
Christopher N. Roman
No abstract provided.
Mitigation Of Control Channel Jamming Under Node Capture Attacks, Patrick Tague, Mingya Li, Radha Poovendran
Mitigation Of Control Channel Jamming Under Node Capture Attacks, Patrick Tague, Mingya Li, Radha Poovendran
Patrick Tague
Availability of service in many wireless networks depends on the ability for network users to establish and maintain communication channels using control messages from base stations and other users. An adversary with knowledge of the underlying communication protocol can mount an efficient denial of service attack by jamming the communication channels used to exchange control messages. The use of spread spectrum techniques can deter an external adversary from such control channel jamming attacks. However, malicious colluding insiders or an adversary who captures or compromises system users are not deterred by spread spectrum, as they know the required spreading sequences. For …
Preliminary Model Tests For The Design Of A Gliding Deep Water Elevator, Christopher Roman, T. Gregory, E. Martin, A. Sanguinetti, J. Drummond
Preliminary Model Tests For The Design Of A Gliding Deep Water Elevator, Christopher Roman, T. Gregory, E. Martin, A. Sanguinetti, J. Drummond
Christopher N. Roman
This paper presents progress on the design of a "smart elevator" to be used in conjunction with deep sea ROV operations. Deep sea elevators are gravity driven untethered platforms used to deliver and or return items from the sea floor. Elevators are used when items are too large or heavy to be handled by the ROV, or when the turn around time to recover and redeploy the ROV system for sample removal is prohibitive. Unfortunately, efficiency is complicated by the precision with which elevators can be landed at a specific location on the bottom and recovered on the surface because …
Design Of A Gas Tight Water Sampler For Auv Operations, Christopher Roman, R. Camilli
Design Of A Gas Tight Water Sampler For Auv Operations, Christopher Roman, R. Camilli
Christopher N. Roman
This paper presents the design and preliminary test results for a small gas tight water sampler intended to work on scientific AUVs. In recent years AUVs have developed into reliable platforms capable of carrying a wide variety of environmental sensors for in-situ chemical measurements. Physical sample collection however remains difficult, due to the combination of space, power and complexity constraints inherent in working with autonomous platforms. The AUV sampler is a small (12 cm times 85 cm) cylindrical package designed to collect eight 20 ml gas tight volumes of water, with each sample maintained at high pressure to depths of …
Applying Agile Approaches To Non-Software Development: Lessons Learned From The Rup For System Z Project, Cécile Péraire
Applying Agile Approaches To Non-Software Development: Lessons Learned From The Rup For System Z Project, Cécile Péraire
Cécile Péraire
No abstract provided.
High-Resolution Mapping In Manus Basin, C. Roman, V. Ferrini
High-Resolution Mapping In Manus Basin, C. Roman, V. Ferrini
Christopher N. Roman
Near-bottom seafloor mapping with precisely navigated deep submergence vehicles has become increasingly common in a range of oceanographic settings. Recent mapping efforts at deep-water hydrothermal vent sites have resulted in high-resolution (sub-meter) bathymetry datasets that can be used to identify morphological features associated with volcanic, tectonic, and hydrothermal processes. The resolution of these maps, and our ability to accurately quantify the complex morphologic details of hydrothermal structures has been limited by a number of variables including navigational accuracy, sonar settings (e.g. acoustic wavelength, sonar orientation, ping rate), survey parameters (e.g. altitude, speed), data density, and data processing techniques (e.g. gridding …
Consistency Based Error Evaluation For Deep Sea Bathymetric Mapping With Robotic Vehicles, Christopher Roman, Hanumant Singh
Consistency Based Error Evaluation For Deep Sea Bathymetric Mapping With Robotic Vehicles, Christopher Roman, Hanumant Singh
Christopher N. Roman
This paper presents a method to evaluate the mapping error present in point cloud terrain maps created using robotic vehicles and range sensors. This work focuses on mapping environments where no a priori ground truth is available and self consistency is the only available check against false artifacts and errors. The proposed error measure is based on a disparity measurement between common sections of the environment that have been imaged multiple times. This disparity measure highlights inconsistency in the terrain map by showing regions where multiple overlapping point clouds do not fit together well. This error measure provides the map …
Self Consistent Bathymetric Mapping Using Sub-Maps: Survey Results From The Tag Hydrothermal Structure, C. Roman, R. Reves-Sohn, H. Singh, S. Humphris
Self Consistent Bathymetric Mapping Using Sub-Maps: Survey Results From The Tag Hydrothermal Structure, C. Roman, R. Reves-Sohn, H. Singh, S. Humphris
Christopher N. Roman
The spatial resolution of microbathymetry maps created using robotic vehicles such as ROVs, AUVs and manned submersibles in the deep ocean is currently limited by the accuracy of the vehicle navigation data. Errors in the vehicle position estimate commonly exceed the ranging errors of the acoustic mapping sensor itself, which creates inconsistency in the map making process and produces artifacts that lower resolution and distort map integrity. We present a methodology for producing self-consistent maps and improving vehicle position estimation by exploiting accurate local navigation and utilizing terrain relative measurements. The complete map is broken down into individual "sub-maps'', which …
High-Resolution Sonar Surveying: Techniques And Strategies For Improved Micro-Bathymetic Mapping, Vicki Ferrini, D. Fornari, T. Shank, D. Kelley, M. Tivey, S. Carbotte, D. Glickson, C. Roman, A. Sterling
High-Resolution Sonar Surveying: Techniques And Strategies For Improved Micro-Bathymetic Mapping, Vicki Ferrini, D. Fornari, T. Shank, D. Kelley, M. Tivey, S. Carbotte, D. Glickson, C. Roman, A. Sterling
Christopher N. Roman
No abstract provided.
Improved Vehicle Based Multibeam Bathymetry Using Sub-Maps And Slam, Christopher Roman, Hanumant Singh
Improved Vehicle Based Multibeam Bathymetry Using Sub-Maps And Slam, Christopher Roman, Hanumant Singh
Christopher N. Roman
This paper presents an algorithm to improve sub-sea acoustic multibeam bottom mapping based on the simultaneous mapping and localization (SLAM) methodology. Multibeam bathymetry from underwater water vehicles can yield valuable large scale terrain maps of the sea door, but the overall accuracy of these maps is typically limited by the accuracy of the vehicle position estimates. The solution presented here uses small bathymetric patches created over short time scales in a sub-mapping context. These patches are registered with respect to one another and assembled in a single coordinate frame to produce a more accurate terrain estimate and provide improved renavigation …
Platform Thinking In Embedded Systems, Robert Iannucci
Platform Thinking In Embedded Systems, Robert Iannucci
Robert A Iannucci
No abstract provided.
Micro-Bathymetric Mapping Using Acoustic Range Images, Christopher Roman, Hanumant Singh
Micro-Bathymetric Mapping Using Acoustic Range Images, Christopher Roman, Hanumant Singh
Christopher N. Roman
This work focuses on the creation of high resolution micro-bathymetric maps using a high frequency pencil beam sonar. These maps typically cover areas of 10's to 100's of square meters. Data is collected using a sonar mounted to an underwater vehicle that can be positioned at discrete locations on the sea floor or flown in a survey pattern above the bottom. Specifically, we are focused on improving the accuracy of these terrain maps by merging sonar pings taken from multiple vantage points over the same location. This requires the adaption of data registration techniques to handle errors related to the …
How A Mirage Is Formed, Christopher Roman
How A Mirage Is Formed, Christopher Roman
Christopher N. Roman
Article that appeared in Sail magazine (ISSN: 0036-2700).
Wind Shear, Christopher Roman
Wind Shear, Christopher Roman
Christopher N. Roman
Article that appeared in Sail magazine (ISSN: 0036-2700).
What Makes The Trades?, Christopher Roman
What Makes The Trades?, Christopher Roman
Christopher N. Roman
Article that appeared in Sail magazine (ISSN: 0036-2700).
Underwater Terrain Reconstruction Using Sonar Data Taken From Multiple Vantage Points, Christopher Roman
Underwater Terrain Reconstruction Using Sonar Data Taken From Multiple Vantage Points, Christopher Roman
Christopher N. Roman
No abstract provided.
Implementing The Rup Analysis And Design Discipline, Cécile Péraire
Implementing The Rup Analysis And Design Discipline, Cécile Péraire
Cécile Péraire
No abstract provided.
Optical And Acoustic Habitat Characterization With The Seabed Auv, Hanumant Singh, Ryan Eustice, Oscar Pizarro, Christopher Roman
Optical And Acoustic Habitat Characterization With The Seabed Auv, Hanumant Singh, Ryan Eustice, Oscar Pizarro, Christopher Roman
Christopher N. Roman
The Seabed AUV is an Autonomous Underwater Vehicle (AUV) built to serve as a readily available and operationally simple tool for high resolution imaging. It is a hover-capable vehicle that performs optical sensing with a 12 bit 1280/spl times/1024 CCD camera and acoustic high resolution mapping using an MST 300 kHz sidescan and a 675 kHz pencil beam bathymetric sonar. The AUV has been designed for operations from small vessels with minimal support equipment. It has an operational depth of 2000 meters and at 1 m/s can run for up to 10 hours. In this paper we report on the …