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2020

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Articles 3091 - 3120 of 3204

Full-Text Articles in Earth Sciences

Microseismic Evidence For Bookshelf Faulting In Western Montana, Ellen Mcgough Smith Jan 2020

Microseismic Evidence For Bookshelf Faulting In Western Montana, Ellen Mcgough Smith

Graduate Student Theses, Dissertations, & Professional Papers

One of the most seismically active regions in the western United States, far from any major plate boundary, is the Intermountain Seismic Belt (ISB). On 6 July 2017, a M5.8 earthquake occurred 11 km southeast of Lincoln, Montana within the ISB. This was the largest earthquake to occur in the state of Montana since the 1959 M7.3 Hebgen Lake earthquake. Data from the University of Montana Seismic Network (UMSN), the Montana Regional Seismic Network (MRSN), and the United States Geological Survey (USGS) were used to investigate the aftershock sequences following the M5.8 Lincoln event. We have manually picked P- and …


Understanding And Measuring Net Positive Business Strategies, Luke Ruffner Robinson Jan 2020

Understanding And Measuring Net Positive Business Strategies, Luke Ruffner Robinson

Graduate Student Theses, Dissertations, & Professional Papers

Despite their attempts to mitigate ecological impacts through sustainability initiatives, businesses are a major cause of the world's ecological problems. Some progressive businesses are attempting to move beyond “net zero” in terms of achieving neutral environmental impacts and instead are now pursuing a goal of net positive. Net positive refers to the idea that business activities could contribute value-added benefits to earth’s ecological systems, for example, by using technologies that sequester and store carbon. However, except for a handful of high-profile corporate case studies, little is known about how companies are developing their strategies to become net positive and …


Application Of Non-Seismic Methods To Analyze And Model The Geometry Of The Northern Margin Of The Onion Creek Salt Diapir, Paradox Basin, Utah, Julia Michelle Astromovich Jan 2020

Application Of Non-Seismic Methods To Analyze And Model The Geometry Of The Northern Margin Of The Onion Creek Salt Diapir, Paradox Basin, Utah, Julia Michelle Astromovich

Open Access Theses & Dissertations

The Onion Creek salt diapir lies within the Paradox Basin of Utah where it forms part of a series of salt walls that separate the Paradox Basin into smaller sub-basins. These sub-basins and associated salt diapirs remain key to several oil and gas traps in the region. A series of anomalous tight folds occur on the northern side of the Onion Creek diapir within the Permian Cutler Group Undifferentiated. These folds are thought to be associated with a shallow detachment horizon with three possible origins:1) a weak shale layer within the Cutler Group, 2) a salt shoulder, or 3) a …


Water Sourcing Strategies Of Highly Resilient Vegetation In Desert Soils: Stable Isotope Analysis Of A Northern Chihuahuan Desert Ecosystem, Hayden Eleanor Thompson Jan 2020

Water Sourcing Strategies Of Highly Resilient Vegetation In Desert Soils: Stable Isotope Analysis Of A Northern Chihuahuan Desert Ecosystem, Hayden Eleanor Thompson

Open Access Theses & Dissertations

Plant water use strategies and water transport dynamics are important for understanding ecosystem productivity and soil-vegetation-atmosphere interactions within an environment (Li et al., 2007). Recent research using stable isotope analysis in wet and humid climates has found that vegetation uses tightly particle-bound water stored in the soil that does not participate in translatory flow (Brooks et al., 2010; Goldsmith et al., 2011; McDonnell 2014). In arid and semi-arid deserts of the United States, highly resilient vegetation, such as the Honey Mesquite (Prosopis glandulosa) and the Creosote shrub (Larrea tridentata), exhibit some degree of activity year-round despite limited water availability during …


Fluvial Interactions Of The Jurassic Salt Wash Member Of The Morrison Formation With The Gypsum Valley Salt Diapir, Co, Clair Henry Bailey Jan 2020

Fluvial Interactions Of The Jurassic Salt Wash Member Of The Morrison Formation With The Gypsum Valley Salt Diapir, Co, Clair Henry Bailey

Open Access Theses & Dissertations

Gypsum Valley diapir in Gypsum Valley Colorado is an ideal location to investigate the interaction between a fluvial system and a diapir going through late stage collapse and rise. The outcrop exposures in Gypsum Valley allow for the analysis in changes of the fluvial system of the Salt Wash Member of the Morrison Formation as it gets redirected by the salt wall and deposits sediment on top of, on the margins, and in the Disappointment and Dry Creek minibasins. Previous work has focused on understanding and predicting how fluvial systems react when they encounter a salt diapir, but all the …


Shallow Seismic Modeling Of The Hydrothermal Plumbing System Beneath Old Faithful Geyser In The Upper Geyser Basin Of Yellowstone National Park, Jordan Rigdon Caylor Jan 2020

Shallow Seismic Modeling Of The Hydrothermal Plumbing System Beneath Old Faithful Geyser In The Upper Geyser Basin Of Yellowstone National Park, Jordan Rigdon Caylor

Open Access Theses & Dissertations

In November 2016, a 2-D and 3-D seismic survey was performed around Old Faithful Geyser in the southeastern portion of the Upper Geyser Basin in Yellowstone National Park. The survey consisted of 521 3-component seismic receiver locations including 39 receivers on a ~1km NE-SW trending line crossing Old Faithful Geyser. A 5.4kg sledgehammer striking a metal plate was our source with a dominant frequency of ~40Hz. Our 2-D line crosses Old Faithful in a NE-SW direction with station spacing at 25-30m with ~100m spacing on either side of Old Faithful and a total length of 1024m. Our 3-D seismic grid …


Uranium Series Dating And Geochemistry Of Fault Zone Precipitated Secondary Carbonates: Insights Into Paleo Fluid Sources, Tectonics And Climate In The Rio Grande Rift, Victor Higareda Garcia Jan 2020

Uranium Series Dating And Geochemistry Of Fault Zone Precipitated Secondary Carbonates: Insights Into Paleo Fluid Sources, Tectonics And Climate In The Rio Grande Rift, Victor Higareda Garcia

Open Access Theses & Dissertations

Fault zones in the shallow crust impact a variety of geological processes including mineral deposition, fluid flow patterns in shallow and deep groundwater aquifers, and most importantly seismic activity. The specific interplays of fault zones, seismicity, and groundwater flows are complex and not well understood despite the importance they have to society. The Rio Grande rift is a region impacted by seismic and volcanic activity that place the first order control on mineral formation and fluid flow patterns. It is also a region that is often disregarded as a seismic hazard due to its inferred low tectonic rates and long …


Lévy Processes: Characterizing Volcanic And Financial Time Series, Peter Kwadwo Asante Jan 2020

Lévy Processes: Characterizing Volcanic And Financial Time Series, Peter Kwadwo Asante

Open Access Theses & Dissertations

In this work, we use the Diffusion Entropy Analysis (DEA) to analyze and detect the scaling properties of time series from both emerging and well established markets as well as volcanic eruptions recorded by a seismic station, both financial and volcanic time series data are known to have high frequencies (i.e they are collected at an extremely fine scale). The objective is to determine the characterization i.e whether they follow a Gaussian or Lévy distribution. If they do follow a Lévy distribution we are then interested in finding if they are characterized by a Lévy walk which has a finite …


Structural Analysis Of Deformed Caprock Associated With A Salt Shoulder At Gypsum Valley Salt Wall, Paradox Basin, Colorado, Hanah Draper Jan 2020

Structural Analysis Of Deformed Caprock Associated With A Salt Shoulder At Gypsum Valley Salt Wall, Paradox Basin, Colorado, Hanah Draper

Open Access Theses & Dissertations

This study documents the style and distribution of deformation present in Triassic-age gypsic and carbonate caprock associated with the Gypsum Valley Salt Wall Salt Shoulder in the Paradox Basin, Colorado in order to determine the mechanism and timing of deformation. Mapping of gypsic and carbonate capstone facies shows that the caprock layering that was generated during formation has been deformed by large-and-small-scale folding and faulting, brecciation, and boudinage. Deformation within the caprock resulted in widely variable orientations along the length of the salt shoulder, that also varies locally in intensity of deformation and with proximity to the passively rising diapir …


Geophysical Investigations Of The San Andreas Fault System And Evaluations In Geoscience Education, Sandra Hardy Jan 2020

Geophysical Investigations Of The San Andreas Fault System And Evaluations In Geoscience Education, Sandra Hardy

Open Access Theses & Dissertations

Chapter 1: Investigating Earthquake Cycle Vertical Deformation Recorded by GPS And Regional Tide Gauge Stations in California

Geodetic and tide gauge measurements of vertical deformation record localized zones of uplift and subsidence that may document critical components of both long and short-period earthquake cycle deformation. In this study, we compare vertical tide gauge data from the Permanent Service for Mean Sea Level (PSMSL) and vertical GPS data from the EarthScope Plate Boundary Observatory (PBO) for 10 approximately co-located station pairs along coastal California from Point Reyes, CA to Ensenada, Mexico. To compare these two data sets, we first truncate both …


Utilizing Zircon (U-Th)/He And 40ar/39ar Thermochronology To Refine The Thermal History Of The Great Unconformity Within New Mexico And Colorado, Jacoup Roiz Jan 2020

Utilizing Zircon (U-Th)/He And 40ar/39ar Thermochronology To Refine The Thermal History Of The Great Unconformity Within New Mexico And Colorado, Jacoup Roiz

Open Access Theses & Dissertations

The Great Unconformity beneath Paleozoic strata represents 100-1000 m.y. of missing rock record that formed through extensive weathering and erosion. Despite its global extent, the timing of Precambrian crystalline rock exhumation prior to Phanerozoic sediment deposition remains relatively unresolved in many locations. I utilized zircon (U-Th)/He (ZHe) thermochronology in order to constrain the long-term thermal history of Precambrian rocks in Colorado and New Mexico, and test my hypoThesis that these units below the Great Unconformity experienced multiple cooling and reheating episodes resulting in a compound surface representing multiple unconformities. In addition to a synThesis of previously reported data in the …


Active Seismic Studies In Lemon Creek Valley Glacier, Juneau, Alaska: Characterization Of Subglacial Sediments To Understand Glacier Dynamics, Lucia Fernanda Gonzalez Jan 2020

Active Seismic Studies In Lemon Creek Valley Glacier, Juneau, Alaska: Characterization Of Subglacial Sediments To Understand Glacier Dynamics, Lucia Fernanda Gonzalez

Open Access Theses & Dissertations

Deformation and flow properties of subglacial sediments as well as the presence and volume of water at the ice/bed interface strongly influence glacier dynamics. Studies of Lemon Creek Glacier, a small temperate valley glacier in the Juneau Icefield, near Juneau, Alaska, have shown that the glacier is rapidly retreating, with a negative mass balance every year since 1957. However, the bed topography and properties of subglacial sediments at the base of Lemon Creek Glacier remained unknown until now. In this project, we process and interpret ~1-km-long NW-SE trending active-source seismic reflection profiles collected during June and July 2017 near the …


Anatomy Of The Magmatic Plumbing System Of Los Humeros Caldera (Mexico): Implications For Geothermal Systems., Federico Lucci, Gerardo Carrasco-Nuñez, Federico Rossetti, Thomas Theye, John C. White, Stefano Urbani, Hossein Azzizi, Yosihiro Asahara, Guido Giordano Jan 2020

Anatomy Of The Magmatic Plumbing System Of Los Humeros Caldera (Mexico): Implications For Geothermal Systems., Federico Lucci, Gerardo Carrasco-Nuñez, Federico Rossetti, Thomas Theye, John C. White, Stefano Urbani, Hossein Azzizi, Yosihiro Asahara, Guido Giordano

EKU Faculty and Staff Scholarship

Understanding the anatomy of magma plumbing systems of active volcanoes is essential not only for unraveling magma dynamics and eruptive behaviors but also to define the geometry, depth, and temperature of the heat sources for geothermal exploration. The Pleistocene–Holocene Los Humeros volcanic complex is part of the eastern Trans- Mexican Volcanic Belt (central Mexico), and it constitutes one of the most important exploited geothermal fields in Mexico with ca. 90MWof produced electricity. With the aim to decipher the anatomy (geometry and structure) of the magmatic plumbing system feeding the geothermal field at Los Humeros, we carried out a field-based petrological …


Real-Time Urban Weather Observations For Urban Air Mobility, Kevin A. Adkins, Mustafa Akbas, Marc Compere Jan 2020

Real-Time Urban Weather Observations For Urban Air Mobility, Kevin A. Adkins, Mustafa Akbas, Marc Compere

International Journal of Aviation, Aeronautics, and Aerospace

Cities of the future will have to overcome congestion, air pollution and increasing infrastructure cost while moving more people and goods smoothly, efficiently and in an eco-friendly manner. Urban air mobility (UAM) is expected to be an integral component of achieving this new type of city. This is a new environment for sustained aviation operations. The heterogeneity of the urban fabric and the roughness elements within it create a unique environment where flight conditions can change frequently across very short distances. UAM vehicles with their lower mass, more limited thrust and slower speeds are especially sensitive to these conditions. Since …


Paleoecology Of Bivalves In The Carmel Formation (Middle Jurassic, Bajocian) Of Utah, Evan L. Shadbolt Jan 2020

Paleoecology Of Bivalves In The Carmel Formation (Middle Jurassic, Bajocian) Of Utah, Evan L. Shadbolt

Senior Independent Study Theses

The Carmel Formation of the Middle Jurassic has many mysteries. One of these enigmas is its bivalves. The formation contains the famous oyster balls called ostreoliths. Despite bivalves making up 80 percent of the fossils found in the Carmel Formation, it is not understood how the bivalves lived in this community. The formation is located in southwestern and central Utah. It was deposited when an epicontinental seaway covered most of Utah. The paleoclimate of Utah was hot and dry, which meant that the environment was evaporite heavy. This also meant that the seawater at the southernmost extent of the seaway …


Paleoenvironments Containing Coryphodon In The Fort Union And Willwood Formations Spanning The Paleocene-Eocene Thermal Maximum (Petm), Bighorn Basin, Wyoming, Emily N. Randall Jan 2020

Paleoenvironments Containing Coryphodon In The Fort Union And Willwood Formations Spanning The Paleocene-Eocene Thermal Maximum (Petm), Bighorn Basin, Wyoming, Emily N. Randall

Senior Independent Study Theses

Preliminary data point toward a new hypothesis in which Coryphodon lived in wetter habitats before the Paleocene-Eocene Thermal Maximum (PETM), but was able to adapt to drier habitats in order to survive post-PETM. Early Paleogene nonmarine strata are extensively exposed in the Bighorn Basin of northwestern Wyoming. The Fort Union and Willwood Formations represent alluvial deposition within a Laramide Basin formed from the Paleocene through early Eocene. Therefore, the basin is an ideal place to study the local effects of the PETM, a rapid global warming event that occurred about 55.5 million years ago at the Paleocene–Eocene boundary. During this …


Atmospheric And Ionospheric Responses To Acoustic And Gravity Waves Driven By Earthquakes And Tsunamis, Pavel A. Inchin Jan 2020

Atmospheric And Ionospheric Responses To Acoustic And Gravity Waves Driven By Earthquakes And Tsunamis, Pavel A. Inchin

Doctoral Dissertations and Master's Theses

Natural hazards (NHs) are causes for significant concern due to their potentially catastrophic impacts on society. The study of their effects on the upper atmosphere can provide significant insight into the coupled nature of geophysical processes, and drives important applications for radio communication and navigation, leading potentially to the development of NH early-warning systems. Although general concepts underlying their coupling mechanisms are well understood, recent computational capabilities, supported by high temporal and spatial density of observations, have reached the level where such processes can be modeled with unprecedented realism for detailed case studies. The studies provided in this thesis are …


Hydromorphological Changes Of Chi River, Mueang District, Khon Kaen Province, Pawat Wattanachareekul Jan 2020

Hydromorphological Changes Of Chi River, Mueang District, Khon Kaen Province, Pawat Wattanachareekul

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis focuses on the analysis of hydrology coupled with geomorphology for river management such as flood mitigation and river restoration. Morphological Quality Index (MQI) is used for assessing hydro-morphological conditions from part of the Chi River (67 km long) at Khon Kaen province, a major river in north-eastern Thailand. This study area has been suffering from unexpected and repeated flooding. MQI is applied to evaluate the degree of hydro-morphological alteration in terms of relative scores (from 0 to 1). Basically, in case that MQI score equals 1, it means the area has no any alteration. On the other hand, …


Geology And Petrochemistry Of Volcanic Rocks In The Lam Sonthi Area, Lop Buri Province, Saowaphap Uthairat Jan 2020

Geology And Petrochemistry Of Volcanic Rocks In The Lam Sonthi Area, Lop Buri Province, Saowaphap Uthairat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Lam Sonthi area is in Lop Buri province, central Thailand. Stratigraphically, the geology of the area consists of five rocks units; Unit I: Khao Ruak siltstone which is correlated to Khao Luak Formation (Early Permian), Unit II: Khao Phaeng Ma conglomerate, Unit III: Khao Ruak volcanics, Unit IV: Lam Sonthi polymictic conglomerate, and Unit V: Kuttaphet sandstone which is correlated to Phu Kradung Formation (Early Jurassic). In addition, the volcanic rocks, which are named as Kuttaphet volcanics and Khok Khli volcanics, could be found in the top of Unit IV as the polymictic intermediate breccia. Petrographic classification identifies the volcanic …


Inspection And Evaluation Of Air Filled Void Inside Reinforced Concrete Structure By Non-Destructive Testing Methods, Thanakit Klomkliew Jan 2020

Inspection And Evaluation Of Air Filled Void Inside Reinforced Concrete Structure By Non-Destructive Testing Methods, Thanakit Klomkliew

Chulalongkorn University Theses and Dissertations (Chula ETD)

Nowadays, almost infrastructure in Thailand are almost reinforced concrete (RC) structure because they are strong and durable enough against environmental changes; nevertheless, the concrete durability will be decreased. The proper concrete integrity survey for potential remedy works is very importance, Thus, this research aims to inspect flaws especially delamination and air-filled void by four Non-Destructive Testing (NDT) methods be composed of 1) ultrasonic pulse velocity (UPV), 2) ultrasonic pulse echo (UPE), 3) impact echo (IE), and 4) ground penetrating radar (GPR). Furthermore, this research is separated two parts be consisted of idealized structures simulated defects and a realistic structure. The …


Mineral Inclusions In Sapphire From Basalt - Related Deposit In Southern Vietnam, Vu Doan Thi Anh Jan 2020

Mineral Inclusions In Sapphire From Basalt - Related Deposit In Southern Vietnam, Vu Doan Thi Anh

Chulalongkorn University Theses and Dissertations (Chula ETD)

Sapphires in Southern Vietnam have been discovered in alluvial deposit derived from Cenozoic basalts. Sample collections for this study were taken from the most significant gem fields including Pleiku, Dak Nong, Di Linh, Binh Thuan, and Krong Nang. Several syngenetic mineral inclusions in these sapphires were classified as alkali feldspar, zircon, ferrocolumbite, pyrochlore, and iron oxides. Mineral chemical characteristics of these inclusions appearred to have evolved from alkaline felsic suite. Oxide mineral inclusions occurred in sapphire included hercynite, wüstite, and ilmenite. Ilmenite ranged in composition between Il49-54He34-40Mt7-10 and Il24-30He36-38Mt35-40 falling in ilmenite-hematite series. Wüstite with nonstoichiometry, (Fe2+0.3-0.9)(Ti3+<0.179Al3+≤0.6Cr3+<0.1 Fe3+≤0.46)£≤0.23O, was usually associated with hercynite inclusion clearly indicating cogenetic sapphire formation. Wüstite and sapphire appeared to have formed from the breakdown reaction of hercynite (hercynite = sapphire+wüstite). Titanohematite series and titanomagnetite series might have crystallized during iron-titanium reequilibration via subsolidus exsolution. U-Pb geochronology of zircon inclusion in these sapphires yielded between 35.5 ± 1.6 Ma (~35 Ma) and 14.73 ± 0.29 Ma (~15 Ma) for Krong Nang sapphire, 5.94 ± 0.13 Ma (~6 Ma) for Binh Thuan and Dak Nong sapphire, and 5.491 ± 0.077 Ma (~5.5 Ma) for Di Linh sapphire. These age constraints relate to the main Cenozoic basaltic eruptions in this region. Crystallization temperature of sapphire formation was estimated at about 561- 7810C using Ti-in-zircon thermometry.


Effects Of Microplastic On Water Flow And Contaminant Transport In Water-Saturated Sand, Siravit Chanprasit Jan 2020

Effects Of Microplastic On Water Flow And Contaminant Transport In Water-Saturated Sand, Siravit Chanprasit

Chulalongkorn University Theses and Dissertations (Chula ETD)

After decades of discovery of microplastic contamination over the world, effects of microplastic on organisms have been studied thoroughly, whereas ones on hydrological aspect are yet quite mentioned. As one of major microplastic sinks, soils are inevitable to face a number of microplastics; however, the movement of microplastic through soil and its consequence are still unknown. Then this research would be focusing on effects of microplastic contamination in soil sediment on hydraulic and transport parameters. Hydraulic conductivity (K), distribution coefficient (Kd), and dispersion coefficient (D) are the main parameters to be measured. The column experiment in column of diameter 7 …


ปัจจัยที่ส่งผลต่อการตัดสินใจบริจาคโลหิตของประชากรกลุ่มเจเนอเรชั่นวายในกรุงเทพมหานคร ในสถานการณ์การระบาดของโรคโควิด-19, ภูษณิศา นวลตา Jan 2020

ปัจจัยที่ส่งผลต่อการตัดสินใจบริจาคโลหิตของประชากรกลุ่มเจเนอเรชั่นวายในกรุงเทพมหานคร ในสถานการณ์การระบาดของโรคโควิด-19, ภูษณิศา นวลตา

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้เป็นการวิจัยเชิงสำรวจ (Survey research) มีวัตถุประสงค์เพื่อศึกษาระดับความรู้ การรับรู้ ทัศนคติ แรงจูงใจ ความกังวลต่อการระบาดของโรคโควิด-19 พฤติกรรมการใช้สื่อ และการตัดสินใจบริจาคโลหิตของประชากรกลุ่มเจเนอเรชั่นวาย ในกรุงเทพมหานคร ในสถานการณ์การระบาดของโรคโควิด-19 และเพื่อหาความสัมพันธ์ของระดับความรู้ การรับรู้ ทัศนคติ แรงจูงใจ ความกังวลต่อการระบาดของโรคโควิด-19 และพฤติกรรมการใช้สื่อเกี่ยวกับการบริจาคโลหิตที่มีความสัมพันธ์กับการตัดสินใจบริจาคโลหิต กลุ่มตัวอย่าง คือ ประชากรในกลุ่มเจเนอเรชั่นวาย ในกรุงเทพมหานคร จำนวน 120 คน เครื่องมือในการวิจัย ประกอบด้วย 8 ส่วน คือ 1) แบบสอบถามข้อมูลส่วนบุคคล 2) แบบสอบถามความรู้เกี่ยวกับการบริจาคโลหิต 3) แบบสอบถามการรับรู้เกี่ยวกับการบริจาคโลหิต 4) แบบสอบถามทัศนคติเกี่ยวกับการบริจาคโลหิต 5) แบบสอบถามแรงจูงใจเกี่ยวกับการบริจาคโลหิต 6) แบบสอบถามความกังวลต่อการระบาดของโรคโควิด-19 7) แบบสอบถามพฤติกรรมการใช้สื่อ 8) แบบสอบถามการตัดสินใจบริจาคโลหิต วิเคราะห์ข้อมูลโดยใช้สถิติพรรณนา ได้แก่ ความถี่ ร้อยละ ค่าเฉลี่ย ส่วนเบี่ยงเบนมาตรฐาน และสถิติอนุมาน ได้แก่ การทดสอบค่าไค-สแควร์ (Chi – Square Test : - Test) และวัดระดับความสัมพันธ์โดยใช้สถิติ Cramer’s V ผลการวิจัย พบว่า 1) กลุ่มตัวอย่างส่วนใหญ่มีความรู้อยู่ในระดับปานกลาง, การรับรู้อยู่ในระดับสูง, ทัศนคติอยู่ในระดับสูง, แรงจูงใจอยู่ในระดับสูง, ความกังวลต่อการระบาดของโรคโควิด-19 อยู่ในระดับปานกลาง พฤติกรรมการใช้สื่ออยู่ในระดับต่ำ มีรูปแบบการใช้สื่อสังคมออนไลน์ และการตัดสินใจบริจาคโลหิตของประชากรกลุ่มเจเนอเรชั่นวาย ในกรุงเทพมหานคร ส่วนมากตัดสินใจไม่บริจาคโลหิต ในสถานการณ์การระบาดของโรคโควิด-19 2) จากการศึกษาความสัมพันธ์ระหว่างความรู้ การรับรู้ ทัศนคติ แรงจูงใจ ความกังวลต่อการระบาดของโรคโควิด-19 และพฤติกรรมการใช้สื่อกับการตัดสินใจบริจาคโลหิต พบว่า ความรู้มีความสัมพันธ์กับการตัดสินใจบริจาคโลหิตอย่างมีนัยสำคัญทางสถิติที่ระดับ 0.01 (= 23.079, p = 0.000) การรับรู้มีความสัมพันธ์กับการตัดสินใจบริจาคโลหิตอย่างมีนัยสำคัญทางสถิติที่ระดับ 0.05 (= 4.532, p …


ผลของโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ต่อสมรรถนะ ของทหารกองประจำการ: กรณีศึกษา มณฑลทหารบกที่ 21 จังหวัดนครราชสีมา, วีรยุทธ หมื่นบุญมี Jan 2020

ผลของโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ต่อสมรรถนะ ของทหารกองประจำการ: กรณีศึกษา มณฑลทหารบกที่ 21 จังหวัดนครราชสีมา, วีรยุทธ หมื่นบุญมี

Chulalongkorn University Theses and Dissertations (Chula ETD)

การวิจัยครั้งนี้เป็นงานวิจัยแบบกึ่งทดลอง (Quasi-experimental research design) แบบกลุ่มเดียววัดก่อนและหลังการทดลอง (One-group Pretest-posttest Design) เพื่อศึกษาสมรรถนะของทหารกองประจำการหลังการได้รับโปรแกรมการเรียนรู้แบบบูรณาการ ในการจัดการภัยพิบัติและอุบัติภัยหมู่และเพื่อเปรียบเทียบสมรรถนะของทหารกองประจำการก่อนและหลังได้รับโปรแกรมการเรียนรู้ แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ กลุ่มตัวอย่างในการวิจัยครั้งนี้ คือ ทหารกองประจำการ มณฑลทหารบกที่ 21 จังหวัดนครราชสีมา จำนวน 40 คน คัดเลือกแบบเฉพาะเจาะจง (Purposive Sampling) เข้าร่วมโปรแกรมการเรียนรู้แบบบูรณาการ ในการจัดการภัยพิบัติและอุบัติภัยหมู่ เครื่องมือในการวิจัยประกอบด้วย 1) เครื่องมือที่ใช้ในการรวบรวมข้อมูล ได้แก่ แบบสอบถามข้อมูล ส่วนบุคคล 2) เครื่องมือที่ใช้ในการดำเนินการทดลอง ได้แก่ 2.1) แบบประเมินสมรรถนะของทหารกองประจำการ มีค่าความเที่ยง เท่ากับ .77 และ 2.2) โปรแกรมการเรียนรู้แบบบูรณาการในจัดการภัยพิบัติและอุบัติภัยหมู่ต่อสมรรถนะของทหารกองประจำการ และ 3) เครื่องมือกำกับการทดลอง ได้แก่ แบบทดสอบความรู้ก่อนเรียนและหลังเรียน (Pre-test and Post-test) มีค่าความเที่ยง เท่ากับ .91 วิเคราะห์ข้อมูลโดยใช้ร้อยละ ค่าเฉลี่ย ส่วนเบี่ยงเบนมาตรฐาน และการทดสอบค่าที ผลการวิจัยสรุปว่า 1. สมรรถนะของทหารกองประจำการหลังการได้รับโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ มีค่าเฉลี่ยคะแนนสูงกว่าก่อนได้รับโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 พบว่า คะแนนสมรรถนะของทหารกองประจำการหลังเข้าร่วมโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ อยู่ในระดับสูง 2. สมรรถนะของทหารกองประจำการก่อนได้รับโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ มีค่าคะแนนเฉลี่ย 25.15 ซึ่งพบว่าอยู่ในระดับต่ำ และหลังได้รับโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ มีค่าคะแนนเฉลี่ย 45.08 ซึ่งพบว่าอยู่ในระดับสูง เมื่อพิจารณาเปรียบเทียบค่าคะแนนเฉลี่ยสมรรถนะของทหารกองประจำการหลังได้รับโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่สูงกว่าก่อนได้รับโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการ ภัยพิบัติและอุบัติภัยหมู่ อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 แสดงให้เห็นว่าโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่ตอบสนองต่อสมรรถนะ ของทหารกองประจำการได้มากขึ้น จึงส่งผลให้ค่าคะแนนเฉลี่ยสมรรถนะของทหารกองประจำการสูงขึ้นหลังจากเข้าร่วมโปรแกรมการเรียนรู้แบบบูรณาการในการจัดการภัยพิบัติและอุบัติภัยหมู่


Stratigraphy And Volcanic Facies In Khao Noi Area, Tha Takiap District, Chachoengsao Province, Amporn Chaikam Jan 2020

Stratigraphy And Volcanic Facies In Khao Noi Area, Tha Takiap District, Chachoengsao Province, Amporn Chaikam

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Khao Noi volcanics is in Tha Takiap district, Chachoengsao province, eastern Thailand. This volcanics is a part of the Lampang volcanic belt, a potential host rocks for mineralizations, especially gold and antimony epithermal style deposits. Based on field investigation, drill core logging, and petrographic study, the Khao Noi host volcanic sequence has a thickness of at least 150 meters. The sequence can be divided into three units, namely 1) Sedimentary unit (Unit 1), 2) Mafic-intermediate volcanic unit (Unit 2), and 3) Felsic volcanic unit (Unit 3). Unit 1 forms as a basement of the Khao Noi volcanic sequence and …


Factors Affecting The 2019 Atlantic Hurricane Season And The Role Of The Indian Ocean Dipole, Kimberly M. Wood, Philip J. Klotzbach, Jennifer M. Collins, Louis-Philippe Caron, Ryan E. Truchelut, Carl J. Schreck Jan 2020

Factors Affecting The 2019 Atlantic Hurricane Season And The Role Of The Indian Ocean Dipole, Kimberly M. Wood, Philip J. Klotzbach, Jennifer M. Collins, Louis-Philippe Caron, Ryan E. Truchelut, Carl J. Schreck

School of Geosciences Faculty and Staff Publications

The 2019 Atlantic hurricane season exhibited above‐average Accumulated Cyclone Energy—60% of which was produced by Hurricanes Dorian and Lorenzo. Most tropical cyclone (TC) activity was concentrated in a ~6‐week period from late August to early October. During the early part of the season, relatively TC‐unfavorable conditions persisted in the main development region (MDR). The MDR environment became largely favorable in September, followed by an abrupt shift back to less conducive conditions in October coincident with a strongly positive Indian Ocean Dipole (IOD). The IOD produced an El Niño‐like teleconnection pattern observed through 200‐hPa velocity potential anomalies. In the subtropical Atlantic, …


The Prebiotic Provenance Of Semi-Aqueous Solvents, Jennifer L. Lago, Bradley T. Burcar, Nicholas V. Hud, Rio Febrian, Christopher A. Mehta, Paul J. Bracher, Zachary D. Atlas, Matthew A. Pasek Jan 2020

The Prebiotic Provenance Of Semi-Aqueous Solvents, Jennifer L. Lago, Bradley T. Burcar, Nicholas V. Hud, Rio Febrian, Christopher A. Mehta, Paul J. Bracher, Zachary D. Atlas, Matthew A. Pasek

School of Geosciences Faculty and Staff Publications

The numerous and varied roles of phosphorylated organic molecules in biochemistry suggest they may have been important to the origin of life. The prominence of phosphorylated molecules presents a conundrum given that phosphorylation is a thermodynamically unfavorable, endergonic process in water, and most natural sources of phosphate are poorly soluble. We recently demonstrated that a semi-aqueous solvent consisting of urea, ammonium formate, and water (UAFW) supports the dissolution of phosphate and the phosphorylation of nucleosides. However, the prebiotic feasibility and robustness of the UAFW system are unclear. Here, we study the UAFW system as a medium in which phosphate minerals …


Utilizing Ecological Niche Modelling To Predict Habitat Suitability Of Eastern Equine Encephalitis In Florida, Claire Burch, Rebecca Loraamm, Thomas R. Unnasch, Joni A. Downs Jan 2020

Utilizing Ecological Niche Modelling To Predict Habitat Suitability Of Eastern Equine Encephalitis In Florida, Claire Burch, Rebecca Loraamm, Thomas R. Unnasch, Joni A. Downs

School of Geosciences Faculty and Staff Publications

Eastern Equine Encephalitis virus (EEEV) is a virus found predominantly east of the Mississippi River in the United States that can be fatal to both equines and humans. The disease has previously been most prolific in states like Florida, but there has been an increase in the prevalence in other states further up north on the east coast of the United States in recent years. The purpose of this research is to use the ecological niche modelling program Maxent to model EEEV habitat suitability probability. This research utilized data of fatality incidence in equine hosts, versus sentinel chicken infection data, …


Optimizing Arbovirus Surveillance Using Risk Mapping And Coverage Modelling, Joni A. Downs, Mehrdad Vaziri, George Deskins, William Kellner, Kristi M. Miley, Thomas R. Unnasch Jan 2020

Optimizing Arbovirus Surveillance Using Risk Mapping And Coverage Modelling, Joni A. Downs, Mehrdad Vaziri, George Deskins, William Kellner, Kristi M. Miley, Thomas R. Unnasch

School of Geosciences Faculty and Staff Publications

Diseases carried by mosquitoes and other arthropods endanger human health globally. Though costly, surveillance efforts are vital for disease control and prevention This paper describes an approach for strategically configuring targeted disease surveillance sites across a study area. The methodology combines risk index mapping and spatial optimization modelling. The risk index is used to identify demand for surveillance, and the maximum covering location problem is used to select a specified number of candidate surveillance sites that covers the maximum amount of risk. The approach is demonstrated using a case study where optimal locations for sentinel surveillance sites are selected for …


A Hydrologic Landscapes Perspective On Groundwater Connectivity Of Depressional Wetlands, Brian P. Neff, Donald O. Rosenberry, Scott G. Leibowitz, Dave M. Mushet, Heather E. Golden, Mark C. Rains, J. R. Brooks, Charles R. Lane Jan 2020

A Hydrologic Landscapes Perspective On Groundwater Connectivity Of Depressional Wetlands, Brian P. Neff, Donald O. Rosenberry, Scott G. Leibowitz, Dave M. Mushet, Heather E. Golden, Mark C. Rains, J. R. Brooks, Charles R. Lane

School of Geosciences Faculty and Staff Publications

Research into processes governing the hydrologic connectivity of depressional wetlands has advanced rapidly in recent years. Nevertheless, a need persists for broadly applicable, non-site-specific guidance to facilitate further research. Here, we explicitly use the hydrologic landscapes theoretical framework to develop broadly applicable conceptual knowledge of depressional-wetland hydrologic connectivity. We used a numerical model to simulate the groundwater flow through five generic hydrologic landscapes. Next, we inserted depressional wetlands into the generic landscapes and repeated the modeling exercise. The results strongly characterize groundwater connectivity from uplands to lowlands as being predominantly indirect. Groundwater flowed from uplands and most of it was …