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Array-Based Guided Wave Source Location Using Dispersion Compensation, Andrew Downs, Ronald A. Roberts, Jiming Song 2021 Iowa State University

Array-Based Guided Wave Source Location Using Dispersion Compensation, Andrew Downs, Ronald A. Roberts, Jiming Song

Electrical and Computer Engineering Publications

An important advantage of guided waves is their ability to propagate large distances and yield more information about flaws than bulk waves. Unfortunately, the multi-modal, dispersive nature of guided waves makes them difficult to use for locating flaws. In this work, we present a method and experimental data for removing the deleterious effects of multi-mode dispersion allowing for source localization at frequencies comparable to those of bulk waves. Time domain signals are obtained using a novel 64-element phased array and processed to extract wave number and frequency spectra. By an application of Auld’s electro-mechanical reciprocity relation, mode contributions are ...


Simulating The Effects Of Floating Platforms, Tilted Rotors, And Breaking Waves For Offshore Wind Turbines, Hannah Johlas 2021 University of Massachusetts Amherst

Simulating The Effects Of Floating Platforms, Tilted Rotors, And Breaking Waves For Offshore Wind Turbines, Hannah Johlas

Doctoral Dissertations

Offshore wind energy is a rapidly expanding source of renewable energy worldwide, but many aspects of offshore wind turbine behavior are still poorly understood and are not accurately captured by low-cost engineering models used in the design process. To help improve these models, computational fluid dynamics (CFD) can provide valuable insight into the complex fluid flows that affect offshore wind turbine power generation and structural loads. This research uses CFD simulations to examine three main topics important to future offshore wind development: how breaking waves affect structural loads for fixed-bottom wind turbines; how platform motions affect power generation, wake characteristics ...


Numerical Modeling Of Advanced Propulsion Systems, Peetak P. Mitra 2021 University of Massachusetts Amherst

Numerical Modeling Of Advanced Propulsion Systems, Peetak P. Mitra

Doctoral Dissertations

Numerical modeling of advanced propulsion systems such as the Internal Combustion Engine (ICE) is of great interest to the community due to the magnitude of compute/algorithmic challenges. Fuel spray atomization, which determines the rate of fuel-air mixing, is a critical limiting process for the phenomena of combustion within ICEs. Fuel spray atomization has proven to be a formidable challenge for the state-of-the-art numerical models due to its highly transient, multi-scale, and multi-phase nature. Current models for primary atomization employ a high degree of empiricism in the form of model constants. This level of empiricism often reduces the art of ...


A Survey Of Mission Opportunities To Trans-Neptunian Objects - Part 7: Utilization Of A Delta-Vega Maneuver, Colter W. Russell, Christopher J. Busic, Andrew M. Farris, Jeongmin A. You, Raj V. Patel, James E. Lyne 2021 University of Tennessee, Knoxville

A Survey Of Mission Opportunities To Trans-Neptunian Objects - Part 7: Utilization Of A Delta-Vega Maneuver, Colter W. Russell, Christopher J. Busic, Andrew M. Farris, Jeongmin A. You, Raj V. Patel, James E. Lyne

Haslam Scholars Projects

Trans-Neptunian Objects have gained interest in lieu of the success of the New Horizons mission. This paper seeks to further the design possibilities for such missions by offering sixteen trajectories to TNO’s by incorporating a Delta-VEGA maneuver, which allows for increased payload mass. These trajectories were simulated using Spaceflight Solution’s Mission Analysis Environment software, which allowed for constraining of mission parameters for optimization. The trajectories were made to have a C3 below 40 km2/s2, minimized transit time, and minimized ΔV. Results are visualized in Figures 3-6 as well as Table 1, which contain all relevant ...


Increasing The Predictive Capability Of Mapping Technologies For Healthcare In Disaster Management, Simon O.M. Adebola 2021 Ohio University

Increasing The Predictive Capability Of Mapping Technologies For Healthcare In Disaster Management, Simon O.M. Adebola

Online Journal of Space Communication

Health as defined by the WHO/EUROs Health 21 is 'the reduction in mortality, morbidity and disability due to detectable disease and disorder, and an increase in the perceived level of health' (WHO, 1999). Health Impact Assessment (HIA) is a combination of procedures, methods and tools by which a policy, program or project may be judged as to its potential effects on the health of a population, and the distribution of those effects within the population (WHO, 1999).


Remote Sensing And Human Health: New Sensors And New Opportunities, Louisa R. Beck, Bradley M. Lobitz, Byron L. Wood 2021 Ohio University

Remote Sensing And Human Health: New Sensors And New Opportunities, Louisa R. Beck, Bradley M. Lobitz, Byron L. Wood

Online Journal of Space Communication

Remote sensing data enable scientists to study the earth's biotic and abiotic components. These components and their changes have been mapped from space at several temporal and spatial scales since 1972. A small number of investigators in the health community have explored remotely sensed environmental factors that might be associated with disease-vector habitats and human transmission risk. However, most human health studies using remote sensing data have focused on data from Landsat's Multispectral Scanner (MSS) and Thematic Mapper (TM), the National Oceanic and Atmospheric Administration (NOAA)'s Advanced Very High Resolution Radiometer (AVHRR), and France's Système Pour ...


Opportunities And Challenges Of E-Health And Telemedicine Via Satelite, C. Dario, A. Dunbar, F. Feliciani, M. Garcia-Barbero, S. Giovannetti, G. Graschew, A. Güell, A. Horsch, M. Jenssen, L. Kleinebreil, R. Latifi, M. M. Lleo, P. Mancini, M. T.J. Mohr, P. Ortiz García, S. Pedersen, J. M. Pérez-Sastre, A. Rey 2021 Ohio University

Opportunities And Challenges Of E-Health And Telemedicine Via Satelite, C. Dario, A. Dunbar, F. Feliciani, M. Garcia-Barbero, S. Giovannetti, G. Graschew, A. Güell, A. Horsch, M. Jenssen, L. Kleinebreil, R. Latifi, M. M. Lleo, P. Mancini, M. T.J. Mohr, P. Ortiz García, S. Pedersen, J. M. Pérez-Sastre, A. Rey

Online Journal of Space Communication

The introduction of Information and Communication Technology (ICT) in the health scenario is instrumental for the development of sustainable services of direct benefit for the European citizen. The setting up of satellite based applications will enhance rapidly the decentralisation and the enrichment of the European territory driving it towards a homogenous environment for healthcare.


Use Of Google Earth™ To Strengthen Public Health Capacity And Facilitate Management Of Vector-Borne Diseases In Resource-Poor Environments, Saul Lozano-Fuentes 2021 Ohio University

Use Of Google Earth™ To Strengthen Public Health Capacity And Facilitate Management Of Vector-Borne Diseases In Resource-Poor Environments, Saul Lozano-Fuentes

Online Journal of Space Communication

Novel, inexpensive solutions are needed for improved management of vector-borne and other diseases in resource-poor environments. Emerging free software providing access to satellite imagery and simple editing tools (e.g. Google Earth™) complement existing geographic information system (GIS) software and provide new opportunities for: (i) strengthening overall public health capacity through development of information for city infrastructures; and (ii) display of public health data directly on an image of the physical environment.

Collaborators include: Saul Lozano-Fuentes, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, USA; Darwin Elizondo-Quiroga, Department of Microbiology, Immunology and Pathology, Colorado State University ...


Satellite Imagery In The Study And Forecast Of Malaria, David J. Rogers, Sarah E. Randolph, Robert W. Snow, Simon I. Hay 2021 Ohio University

Satellite Imagery In The Study And Forecast Of Malaria, David J. Rogers, Sarah E. Randolph, Robert W. Snow, Simon I. Hay

Online Journal of Space Communication

More than 30 years ago, human beings looked back from the Moon to see the magnificent spectacle of Earthrise. The technology that put us into space has since been used to assess the damage we are doing to our natural environment and is now being harnessed to monitor and predict diseases through space and time. Satellite sensor data promise the development of early-warning systems for diseases such as malaria, which kills between 1 and 2 million people each year.


Adoption Of Telemedicine In Scottish Remote And Rural General Practices: A Qualitative Study, Gerry King, Helen Richards, David Godden 2021 Ohio University

Adoption Of Telemedicine In Scottish Remote And Rural General Practices: A Qualitative Study, Gerry King, Helen Richards, David Godden

Online Journal of Space Communication

In the past decade there has been increasing use of information technology in Scottish primary care. The majority of general practitioners (GPs) now accept that computing is part of their everyday practice. Some GPs in Scotland have used telemedicine for the referral of patients for specialist opinion or for access to educational resources. However, although the potential benefits of telemedicine to primary care are arguably greatest in the remote and rural context, the few existing studies suggest that uptake is slow and piecemeal. There have been a number of studies of the knowledge, experience and attitudes of health-care professionals to ...


An Internet-Based Telemedicine System In Nigeria, Olumide Sunday Adewale 2021 Ohio University

An Internet-Based Telemedicine System In Nigeria, Olumide Sunday Adewale

Online Journal of Space Communication

Telecommunication technologies are being used to change the healthcare industry in unprecedented and irreversible ways. These technologies are enabling delivery of healthcare to remotely placed patients and facilitating information exchange between generalists and specialists. For many decades now, the use of advanced telecommunications and information technologies has been investigated in an effort to improve healthcare. In particular, the focus has been centered on telemedicine. Telemedicine has been defined as the delivery of healthcare and the exchange of health information across distances, including all medical activities: making diagnosis, treatment, prevention, education and research (Craig, 1999). Telemedicine is also defined as the ...


A Review Of Telemedicine In China, Zhelong Wang, Hong Gu 2021 Ohio University

A Review Of Telemedicine In China, Zhelong Wang, Hong Gu

Online Journal of Space Communication

Telemedicine changes conventional medical practice and enables patients to access medical service via telecommunication. Telemedicine thus establishes a new kind of relationship between smaller hospitals and larger ones, and between patients and hospitals generally. Patients and subordinate hospitals may benefit from the resources of large hospitals, via teleconsultation, telediagnosis and telemonitoring. This is particularly beneficial for patients living in rural areas, where the health-care system is less well developed than in cities.


A Review Of Ict Systems For Hiv/Aids And Anti-Retroviral Treatment Management In South Africa, Tove Sørensen, Ulrike Rivett, Jill Fortuin 2021 Ohio University

A Review Of Ict Systems For Hiv/Aids And Anti-Retroviral Treatment Management In South Africa, Tove Sørensen, Ulrike Rivett, Jill Fortuin

Online Journal of Space Communication

HIV/AIDS is a major global health problem. In South Africa, it is estimated that 5.4 million people are infected by HIV, out of a population of nearly 48 million, giving a prevalence rate of about 11%. About 600,000 individuals are infected with AIDS. Furthermore, the estimates show that, by mid-2006, some 711,000 people were in need of anti-retroviral treatment (ART), while 225,000 were actually receiving it.


Re-Inventing Health Care Training In The Developing World: The Case For Satellite Applications In Rural Environments, Krishnan Haridasan, Srinivasan Rangarajan, Gregory Pirio 2021 Ohio University

Re-Inventing Health Care Training In The Developing World: The Case For Satellite Applications In Rural Environments, Krishnan Haridasan, Srinivasan Rangarajan, Gregory Pirio

Online Journal of Space Communication

The rapid advance of Information Communication Technology (ICT) in low and middle income countries has created an unprecedented opportunity to change the way that pre-service and in-service education of health care workers is delivered. The virtual ubiquity of satellite delivery, the dramatically increasing accessibility to the Internet, and the ever expanding mobile phone platform means that there is virtually no part of the world that cannot take advantage of ICT to deliver more effective and less costly learning experience to health care practitioners. ICT can play a vital role in training healthcare professionals, across the board - in nursing schools, medical ...


Telehealth Policy: Looking For Global Complementarity, Richard E. Scott, M. Faruq U. Chowdhury, Sunil Varghese 2021 Ohio University

Telehealth Policy: Looking For Global Complementarity, Richard E. Scott, M. Faruq U. Chowdhury, Sunil Varghese

Online Journal of Space Communication

Telehealth, or increasingly 'e-health',[1] has been accepted by the World Health Organization as an important tool in achieving the goal of health for all. It has also been accepted in developing countries.[2] The primary motivators include the expectations that e-health will reduce health-care costs, expand services to under-served areas and populations, facilitate the change to a more public health orientation, and improve people's health, nutrition, knowledge and standards of living.[2-4] However, e-health needs to be integrated into existing health-care systems, in both a practical and a policy sense. Indeed, policy decisions will affect the ability of ...


Telemedicine Systems And Telecommunications, Brett Harnett 2021 Ohio University

Telemedicine Systems And Telecommunications, Brett Harnett

Online Journal of Space Communication

The practice of telemedicine can be divided into two distinct categories: realtime and store-and-forward. Realtime telemedicine involves synchronous interaction between the parties concerned. For example, a health-care professional and a patient may interact by videoconferencing. While realtime telemedicine is often effective in terms of consultation and patient satisfaction,[1][2] it presents challenges. Foremost is the scheduling of the parties concerned, because there are usually two health-care providers involved in the consultation (the local provider and the remote physician), and they both need to be available at the same time.


Satellite Services For Disaster Management And Security Applications, Otto Koudelka, Peter Schrotter 2021 Ohio University

Satellite Services For Disaster Management And Security Applications, Otto Koudelka, Peter Schrotter

Online Journal of Space Communication

Satellites can be a vital communications element in case of emergencies or natural disasters. This is not only true for developing countries, but also for highly developed regions. As the example of the floods in Central Europe in 2002 have shown, even basic telecommunications services can become unavailable. During natural or man-made disasters, access to data from meteorological and remote sensing satellites is extremely important for assessing the situation.


Issue 14: From The Guest Editor, Rafael Obregon 2021 Ohio University

Issue 14: From The Guest Editor, Rafael Obregon

Online Journal of Space Communication

Introduction from Rafael Obregon, Associate Professor, School of Media Arts and Studies and Director, Communications and Development Studies Program at Ohio University.


The Possible Use Of Telemedicine In Developing Countries, R. Wootton 2021 Ohio University

The Possible Use Of Telemedicine In Developing Countries, R. Wootton

Online Journal of Space Communication

Since the place of telemedicine in the industrialized world is by no means properly worked out yet, it might seem premature to consider its use in developing countries. Nonetheless, there is interest in the possible use of telemedicine in developing countries, from at least two organizations:

  1. The Midjan group, an impromptu committee that was formed following the African Regional Telecommunications Development Conference in Abidjan in March 19963. This European telemedicine collaboration group aims to explore the use of telemedicine in developing countries. At present, the group includes representatives from 22 telecommunication and medical informatics suppliers, telecommunication operators, universities, hospitals and ...


Sponsors: Reach To Space Conference On Space Commercialization: A Celebration Of 50 Years In Space, D. Flournoy 2021 Ohio University

Sponsors: Reach To Space Conference On Space Commercialization: A Celebration Of 50 Years In Space, D. Flournoy

Online Journal of Space Communication

Sponsors of the Reach to Space Conference on Space Commercialization: A Celebration of 50 Years in Space


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