Energy And Environmental Analyses Of A Solar–Gas Turbine Combined Cycle With Inlet Air Cooling,
2024
University of Kentucky
Energy And Environmental Analyses Of A Solar–Gas Turbine Combined Cycle With Inlet Air Cooling, Ahmad M. Abubaker, Adnan Darwish Ahmad, Binit B. Singh, Yaman M. Manaserh, Loiy Al-Ghussain
Institute of Research for Technology Development Faculty Publications
Sensitivity to ambient air temperatures, consuming a large amount of fuel, and wasting a significant amount of heat dumped into the ambient atmosphere are three major challenges facing gas turbine power plants. This study was conducted to simultaneously solve all three aforementioned GT problems using solar energy and introducing a new configuration that consists of solar preheating and inlet-air-cooling systems. In this study, air was preheated at a combustion chamber inlet using parabolic trough collectors. Then, inlet air to the compressor was cooled by these collectors by operating an absorption cooling cycle. At the design point conditions, this novel proposed …
Participatory Mapping Of Tree Equity, Preferences, And Environmental Justice In Portland, Oregon,
2024
Portland State University
Participatory Mapping Of Tree Equity, Preferences, And Environmental Justice In Portland, Oregon, Kate Gregory, Idowu Ajibade
Geography Faculty Publications and Presentations
In this study, we examine community lived experiences, preferences, and narratives about tree equity in Portland, Oregon. Using an environmental justice framework combined with participatory mapping, focus group discussions, and semi-structured interviews, we examine values, perceptions of canopy cover, and everyday relationships with trees across different racial and socio-economic backgrounds. Results show that participants from neighborhoods with histories of investment and privilege had different lived experiences compared to those with histories of disinvestment and marginalization. While participants overall valued trees, concerns about tree-related risk and safety varied in ways that reflected racial and class identities. Furthermore, memories and historic knowledge …
Modelling Postfire Recovery Of Snow Albedo And Forest Structure To Understand Drivers Of Decades Of Reduced Snow Water Storage And Advanced Snowmelt Timing,
2024
Portland State University
Modelling Postfire Recovery Of Snow Albedo And Forest Structure To Understand Drivers Of Decades Of Reduced Snow Water Storage And Advanced Snowmelt Timing, A. Surunis, K. E. Gleason
Environmental Science and Management Faculty Publications and Presentations
Forest fires darken snow albedo and degrade forest structure, ultimately reducing peak snow–water storage, and advancing snowmelt timing for up to 15 years following fire. To date, no volumetric estimates of watershed-scale postfire effects on snow–water storage and snowmelt timing have been quantified over decades of postfire recovery. Using postfire parameterizations in a spatially-distributed snow mass and energy balance model, SnowModel, we estimated postfire recovery of forest fire effects on snow–water equivalent (SWE) and snowmelt timing over decades following fire. Using this model, we quantified volumetric recovery of forest fire effects on snow hydrology across a chronosequence of eight sub-alpine …
Snapshots Of Coastal Ecology Using Multiproxy Analysis Reveals Insights Into The Preservation Of Swamp And Marsh Environments Since The Late Pleistocene,
2024
Louisiana State University
Snapshots Of Coastal Ecology Using Multiproxy Analysis Reveals Insights Into The Preservation Of Swamp And Marsh Environments Since The Late Pleistocene, Kendall Fontenot, Kristine L. Delong, Brian A. Schubert, Sophie Warny, Davin J. Wallace, Carrie M. Miller, Erin Culver-Miller, Michael J. Polito, Carl A. Reese, Kathryn Garretson, Kehui Xu, Grant L. Harley, Jeffrey Obelcz, Kelli L. Moran, Julian Traphagan, Douglas Jones, Alicia Caporaso
Faculty Publications
The southeastern United States Coastal Plain ecosystem contains baldcypress (Taxodium distichum) swamps and grass-dominated marshes. These ecosystems also occurred on the exposed continental shelf during lower sea levels but are rarely preserved due to the mechanically erosive nature of transgression and regression. Two presently marine sites on the northeastern Gulf of Mexico's continental shelf contain well-preserved woody terrestrial sediments that were the subject of previous studies. This study continues the investigation using geochemical (δ13C, δ15N, δ34S) and palynological characteristics of these formerly terrestrial sediments to determine if swamps and/or marshes existed at the time of deposition. The first site is …
Spatiotemporal Analysis Of Nighttime Crimes In Vienna, Austria,
2024
Louisiana State University
Spatiotemporal Analysis Of Nighttime Crimes In Vienna, Austria, Jiyoung Lee, Michael Leitner, Gernot Paulus
Faculty Publications
Studying the spatiotemporal dynamics of crime is crucial for accurate crime geography research. While studies have examined crime patterns related to weekdays, seasons, and specific events, there is a noticeable gap in research on nighttime crimes. This study focuses on crimes occurring during the nighttime, investigating the temporal definition of nighttime crime and the correlation between nighttime lights and criminal activities. The study concentrates on four types of nighttime crimes, assault, theft, burglary, and robbery, conducting univariate and multivariate analyses. In the univariate analysis, correlations between nighttime crimes and nighttime light (NTL) values detected in satellite images and between streetlight …
Integrating Remote Sensing And Machine Learning To Determine Past, Current And Future Crop Water Use From The Nubian Sandstone Aquifer System,
2024
University of Nebraska-Lincoln
Integrating Remote Sensing And Machine Learning To Determine Past, Current And Future Crop Water Use From The Nubian Sandstone Aquifer System, Moaz Ishag
Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research
The agriculture sector is a significant consumer of water, and sustainable water use begins with monitoring irrigated land. Delineating irrigated land supports decision-makers and promotes the sustainable use of this crucial resource. This study focuses on the Nubian Sandstone Aquifer System (NSAS), the largest aquifers in the world, which spans Egypt, Sudan, Libya, and Chad. The study aims to: 1) quantify the increase in irrigated hectares (both pivot and non-pivot) from 2000-2001 to 2023-2024; 2) identify major irrigated crop types and their water requirements; and 3) quantify groundwater crop water use from the NSAS using remote sensing via the Google …
Spatial Ecology Of Mountain Lions Throughout Their Distribution In California,
2024
University of Nebraska-Lincoln
Spatial Ecology Of Mountain Lions Throughout Their Distribution In California, Kyle Duncan Dougherty
Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–
Mountain lions (Puma concolor) have been studied extensively throughout their wide geographic distribution in the Western Hemisphere, but most research has been conducted at relatively small spatial scales. We used GPS telemetry data contributed by researchers in 16 study areas throughout California to advance understanding of mountain lion spatial ecology. First, we investigated multi-scale resource selection of mountain lions relative to spatially varying risk of intentional human-caused mortality associated with livestock depredation management. We show that individuals that proactively avoided mortality risk when selecting home ranges were able to relax their avoidance of risk when making resource selection …
Spatial Ecology Of Mountain Lions Throughout Their Distribution In California,
2024
University of Nebraska-Lincoln
Spatial Ecology Of Mountain Lions Throughout Their Distribution In California, Kyle D. Dougherty
School of Natural Resources: Dissertations, Theses, and Student Research
Mountain lions (Puma concolor) have been studied extensively throughout their wide geographic distribution in the Western Hemisphere, but most research has been conducted at relatively small spatial scales. We used GPS telemetry data contributed by researchers in 16 study areas throughout California to advance understanding of mountain lion spatial ecology. First, we investigated multi-scale resource selection of mountain lions relative to spatially varying risk of intentional human-caused mortality associated with livestock depredation management. We show that individuals that proactively avoided mortality risk when selecting home ranges were able to relax their avoidance of risk when making resource selection …
Impact Of Rainfall On Air Temperature, Humidity And Thermal Comfort In Tropical Urban Parks,
2024
Singapore Management University
Impact Of Rainfall On Air Temperature, Humidity And Thermal Comfort In Tropical Urban Parks, Juan A. Acero, Philip Carl Kestel, Hieu T. Dang, Leslie K. Norford
Research Collection College of Integrative Studies
Urban areas in hot and humid tropical regions are frequently exposed to uncomfortable thermal levels. A well-developed urban heat mitigation strategy is increasing vegetation infrastructure, even though the impact differs based on regional climate. In this study we have evaluated the impact of rainfall on air temperature, humidity and thermal comfort inside a large urban park in Singapore, based on measurement campaigns. A comparison between the park and an urban site is presented. Results show that rainfall significantly reduces air temperature and improves thermal comfort levels, not only right after the rain event but also in the after-event dry period. …
Evaluating Urban Fire Vulnerability And Accessibility To Fire Stations And Hospitals In Austin, Texas,
2024
Singapore Management University
Evaluating Urban Fire Vulnerability And Accessibility To Fire Stations And Hospitals In Austin, Texas, Akhil Mandalapu, Kijin Seong, Junfeng Jiao
Research Collection College of Integrative Studies
Anthropogenic climate change has increased the frequency and intensity of fires. Despite their widespread consequences, current research has largely overlooked urban fires and their associated vulnerability. This study seeks to identify patterns of fire vulnerability, map out areas with high fire vulnerability and limited access to fire stations and hospitals, and ultimately determine the factors contributing to increased fire incidents. Principal Component Analysis was used to develop a fire vulnerability index comprising variables capturing health status and socio-environmental factors. Enhanced 2-step floating catchment area (E2SFCA) analysis was conducted to determine relative accessibility to resources such as hospitals and fire stations. …
Bridging The Nature-Cultural Heritage Gap: Evaluating Sustainable Entanglements Through Cemeteries In Urban Asia,
2024
Singapore Management University
Bridging The Nature-Cultural Heritage Gap: Evaluating Sustainable Entanglements Through Cemeteries In Urban Asia, David Ocon, Wei Ping Young
Research Collection School of Social Sciences
The expanding footprint of urban Asian settlements and increasing living standards have put pressure on cemetery sites. Public health narratives and the sanctity associated with death matters in Asian urban landscapes have fed into the rhetoric of cemeteries as undesirable heritage spaces. Often lacking protection, many cemeteries have been exhumed, cleared, and relocated to allow room for new developments and infrastructure, risking the survival of this quiet element of the urban cultural patrimony. Within an Asian context, synergies between nature and cultural heritage preservation are not prevalent in major cities like Singapore, Hong Kong, Tokyo, Manila, Kuala Lumpur, and Bangkok. …
Spatial Distribution Of The Use Of E-Government Services In The City Of Amman,
2024
PhD student, University of Jordan, Amman, Jordan.
Spatial Distribution Of The Use Of E-Government Services In The City Of Amman, Hanaa Al-Momani, Hamzeh Al-Khawaldeh
Association of Arab Universities Journal for Arts مجلة اتحاد الجامعات العربية للآداب
This study aims to identify the reality of e-government services in the city of Amman, and to distribute them spatially according to the administrative regions of the Greater Amman Municipality, with an indication of the demographic, social and economic characteristics of their users, and to measure the degree of satisfaction with these services by them. The study used a set of approaches to achieve its objectives, such as the descriptive statistical approach and analysis, through the application of some descriptive statistical methods. Such as the mean, median, percentages, and frequencies, in addition to using geographic information systems software (ARC GIS …
Cover And Forewords,
2024
The University of the West Indies
A Note From The Editor,
2024
The University of the West Indies
A Note From The Editor, Casey D. Allen
The Geographical Bulletin
A Note from the Editor
Luck In The Life Of A Geographer,
2024
University of Wisconsin-Madison
Luck In The Life Of A Geographer, Yi-Fu Tuan
The Geographical Bulletin
Luck plays a far greater role in our life than we are willing to acknowledge, for the obvious reason that it detracts from our role as agents. I, for one, used to see myself as planning my career path and then following it. Only now, in extreme old age, do I find the idea of that planned life untenable. Looking back, at critical points, it was not the wisdom of my planning, but rather happenstance that took me to the more fruitful way. Let me start with graduate school, a choice I had to make in my last year as …
Volume 62-1 Complete Issue,
2024
The University of the West Indies
Volume 62-1 Complete Issue, Casey D. Allen
The Geographical Bulletin
Volume 62-1 Complete Issue
Deep In The Karst: Foundations For A Career In Geography,
2024
University of California
Deep In The Karst: Foundations For A Career In Geography, Michael F. Goodchild
The Geographical Bulletin
In the last lines of his poem “In Praise of Limestone”, W.H. Auden wrote, “[W]hen I try to imagine a faultless love or the life to come, what I hear is the murmur of underground streams, what I see is a limestone landscape”. When I was 12, my family moved to two acres of land underlain by Devonian limestone in Paignton, county of Devon, southwest England. At age 15, I began exploring the local caves – small, tight, but beautifully decorated. Later, studying physics at Cambridge, I found the University’s caving club and spent many happy weekends in and under …
The Deviant Geographer,
2024
University of Arizona
The Deviant Geographer, Janice Monk, Casey D. Allen
The Geographical Bulletin
I’ve spent my life being a deviant. When I say that, I don’t necessarily mean in a delinquent sense (though that has been necessary at times). Rather, I mean I’ve always had to approach things differently. Things about your own life and background can help to shape and widen the ways in which we study, and how we see the world – even if you don’t realize it. For me, it was a combination of breaking my work-a-day upbringing cycle (I came from a working-class family and lived/grew-up in the Petersham suburb, west of downtown Sydney, Australia) and being the …
Revisiting Geomorphological Hotspots,
2024
University of Oxford
Revisiting Geomorphological Hotspots, Andrew Goudie
The Geographical Bulletin
In 1996, just a quarter of a century ago, I wrote a paper called “Geomorphological ‘hotspots’ and global warming” (Goudie 1996). My motivation to choose this theme, was that various biogeographers and ecologists, fearing loss of biodiversity due to human activities, had used the phrase “biodiversity hotspots” for those areas that may be of greatest significance because of their sensitivity and the richness (and endemicity) of their fauna and flora. A leader in this was a forester, Norman Myers, who had published an influential paper in 1992. T his made me wonder whether there were “geomorphological hotspots” where the environment …
Viral Worlds: Zika And Matter Of Global Health Futures,
2024
University of Glasgow
Viral Worlds: Zika And Matter Of Global Health Futures, Deborah Dixon
The Geographical Bulletin
As a site for ‘cutting edge’ research, virology has a profoundly conservative genealogy, its promulgations on the origins of viral disease intimately wrapped in prognostications on the ending of human life. Since the late 19th century, a concern for the reach of pathogenic viral matter into human bodies has emerged as a deeply colonial project, with fears over the transformation of endemic diseases into epidemic ones conjoined with cautions of population decline in the colonies and disrupted trade routes. Colonial authorities in Africa, Asia, the Caribbean and Latin America framed viral disease as a ‘public health’ problem – a problem …
