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Articles 7591 - 7620 of 8621
Full-Text Articles in Physical Sciences and Mathematics
Renewable Energy Integration: An Approach For Micro-Grid Optimization., Nicolas Lopez
Renewable Energy Integration: An Approach For Micro-Grid Optimization., Nicolas Lopez
Open Access Theses & Dissertations
This thesis explores the Renewable Energy Integration Problem beginning with a literature review on the different sources of electrical energy classified as Non-Renewable and Renewable, stating that the integration of renewable sources within the pre-existing Power-Grids is a current worldwide problem that is being addressed with different approaches.
The impossibility to exactly model the different equations relating the electric output of the renewable energy sources as they relate with meteorological factors, makes the renewable sector a stochastic component of the overall mathematical model, where it can be concluded that most of the problem is in the area of the forecast. …
A Gis-Based Emission And Air Quality Impact Assessment For Evaluating Transportation Mitigation Measures, Jose Maria Mares
A Gis-Based Emission And Air Quality Impact Assessment For Evaluating Transportation Mitigation Measures, Jose Maria Mares
Open Access Theses & Dissertations
The research presented here develops a framework that assesses a transportation project's air quality impact. The framework not only integrates transportation and emission modeling but also improves the accuracy of the emission estimates. In order to do this, the framework makes use of six modules: environmental conditions data input, GIS database, emission modeling, transportation network, post-processing, and graphical presentation. Each module aims to improve the quality and accuracy of the inputs used by MOBILE6.2. In addition, the framework has the capability, among other features, of presenting the emission estimates in a GIS-based modeling platform that enables the analyst to spatially …
Granulometry And Geochemistry Of Dust Emission From Owens (Dry) Lake, California, Analila Rojo
Granulometry And Geochemistry Of Dust Emission From Owens (Dry) Lake, California, Analila Rojo
Open Access Theses & Dissertations
Owens (dry) Lake, the terminus of Owens River, is located in the Basin and Range physiographic province in east–central California. The transformation of Owens Lake into a desiccated desert playa (approximately 280 km2) via diversion of the river into the Los Angeles Aqueduct (in 1913) led to extensive wind erosion, making the playa one of the most intense sources of airborne dust in the Western Hemisphere. The processes that direct the chemical and mineralogical composition of surface sediments at Owens (dry) Lake and the physical mechanisms of wind erosion, saltation and dust emission at Owens (dry) Lake are well–understood. However, …
Mineralization In The San Juan Mountains, Colorado, William M. Sheriff
Mineralization In The San Juan Mountains, Colorado, William M. Sheriff
Open Access Theses & Dissertations
none
Seismic Investigation Of The Southern Rio Grande Rift, Lennox Emmanuel Thompson
Seismic Investigation Of The Southern Rio Grande Rift, Lennox Emmanuel Thompson
Open Access Theses & Dissertations
Competing models exist to explain what caused the Earth's crust to spread apart 29 million years ago to create a region known today as the Rio Grande Rift (RGR). The RGR extends from central Colorado through New Mexico to northern Mexico, near El Paso. The RGR has different geologic features that distinguish it from most other valleys (e.g., the RGR was not cut by a river nor does a river branch upstream). A growing body of evidence shows that geologic activity still occurs in the RGR, with a continuation of faulting, seismicity and widening at a small rate of about …
The Use Of Social Marketing As A Means Of Promoting Enviornmental Conservation: A Case Study Of Indonesian Biodiversity Campaigns, Alesia Za Gara
The Use Of Social Marketing As A Means Of Promoting Enviornmental Conservation: A Case Study Of Indonesian Biodiversity Campaigns, Alesia Za Gara
Open Access Theses & Dissertations
As a means of preserving Indonesia's natural allure and resources it is evident that there must be a conscious shift made wherein environmental conservation becomes top priority among the people of Indonesia and the world. Traditionally dealt with through a country's governmental facets, a new tread of social marketing is now being employed ENGOs in various countries such as Indonesia as a way to promote biodiversity conservation. For example, one such ENGO is Rare Conservation, an international organization that teaches social marketing tools to classes or cohorts of individuals around the world as a means of improving a variety of …
Observer-Dependent Model For Analyzing Subjective Parameters In Epidemiology, Milad Zarei
Observer-Dependent Model For Analyzing Subjective Parameters In Epidemiology, Milad Zarei
Open Access Theses & Dissertations
Although medical technologies for preventing the contagion and spread of infectious diseases have improved steadily throughout the last century, new infectious diseases are still emerging and spreading swiftly. The modeling of infectious disease spread is crucial in addressing the lack of predictive ability in epidemiology. Managing the spread of infectious diseases requires processing quantitative epidemiological data and the ability to capture the dynamics of the infectious disease in order to provide a measure of control.
In this thesis, I have introducing cognitive biases in diseases spread modeling. For the first time, to the author's knowledge, the human subjective experience has …
On Relational Quantum Mechanics, Oscar Acosta
On Relational Quantum Mechanics, Oscar Acosta
Open Access Theses & Dissertations
A problem facing quantum mechanics is that there are a number of views or interpretations available that purport to 'explain' quantum mechanics. In this paper I discuss and analyze the view of relational quantum mechanics by Carlo Rovelli in the context of theoretical underdetermination. I will show that even though Rovelli offers a view that consolidates some of the aspects of competing theories it still falls short of breaking out of the theoretical underdetermination. The criteria that I have used to consider a theory successful in this context is one that increases the predictive output of quantum theory. Lacking an …
An Ab-Initio Study Of The Elastic Properties Of Important Group Iv Diborides At High Temperatures, Manny Gonzales
An Ab-Initio Study Of The Elastic Properties Of Important Group Iv Diborides At High Temperatures, Manny Gonzales
Open Access Theses & Dissertations
Presented is an ab-initio Molecular Dynamics (MD) study, employing the Density Functional Theory (DFT), of the lattice parameter, thermal expansion coefficients and elastic constants of ZrB2, TiB2 and HfB2 as a function of temperature. The MD trajectories provide the equilibrium lattice parameters at finite temperatures, and the gradient of the energy from these equilibrium solutions is then used to calculate the components of the stiffness tensor. The results for ZrB2 are shown to agree well with reported experimental results for the lattice parameters and elastic constants as a function of temperature.
Controlling Features And Processes For Radionuclide Release From Unsaturated Zone Geological Repositories, Lubna K. Hamdan
Controlling Features And Processes For Radionuclide Release From Unsaturated Zone Geological Repositories, Lubna K. Hamdan
Open Access Theses & Dissertations
In the long run, nuclear waste packages will fail gradually due to localized and general corrosion and radionuclides will be transported to the accessible environment by ground water.
Two main failure scenarios are expected for the waste packages: Flow-through model and bathtub model; in the flow-through model water flows through the waste container, while in the bathtub model water pools inside the waste package. The Department of Energy, in their performance assessment of the proposed repository at Yucca Mountain, excluded the bathtub model from their analysis and assumed the diffusion and advection to be in the same direction in the …
A New Green Chemistry Method Based On Plant Extracts To Synthesize Gold Nanoparticles, Milka Odemariz Montes Castillo
A New Green Chemistry Method Based On Plant Extracts To Synthesize Gold Nanoparticles, Milka Odemariz Montes Castillo
Open Access Theses & Dissertations
Extraordinary chemical and physical properties exhibited by nanomaterials, as compared to their bulk counterparts, have made the area of nanotechnology a growing realm in the past three decades. It is the nanoscale size (from 1 to 100 nm) and the morphologies of nanomaterials that provide several properties and applications not possible for the same material in the bulk. Magnetic and optical properties, as well as surface reactivity are highly dependent on the size and morphology of the nanomaterial. Diverse nanomaterials are being widely used in molecular diagnostics as well as in medicine, electronic and optical devices. Among the most studied …
Design Of Organic Tandem Solar Cells Using Pcpdtbt: Pc61 Bm And P3ht: Pc71bm, Gon Namkoong, Patrick Boland, Keejoo Lee, James Dean
Design Of Organic Tandem Solar Cells Using Pcpdtbt: Pc61 Bm And P3ht: Pc71bm, Gon Namkoong, Patrick Boland, Keejoo Lee, James Dean
Electrical & Computer Engineering Faculty Publications
We conducted optical and electrical simulations with the goal of determining the optimal design for conjugated polymer-fullerene tandem solar cells using poly[2,6-(4,4-bis-(2-ethylhexyl)- 4H-cyclopenta[2,1- b;3,4- b′] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT): [6,6]-phenyl C61 butyric acid methyl ester (PC61 BM) as a bottom cell and poly(3-hexylthiophene) (P3HT): [6,6]-phenyl C71 butyric acid methyl ester (PC71BM) as a top cell. The effects of photon density, absorption, balanced and unbalanced charge carrier transport, and bimolecular recombination in the two subcells were incorporated into the simulations. We found that the maximum energy conversion efficiency (η) is 9% when charge carrier mobilities in …
บทสัมภาษณ์ : รองศาสตราจารย์ ดร. อมร เพชรสม ประธานคณะกรรมการเพื่อความปลอดภัยทางชีวภาพระดับสถาบันของจุฬาลงกรณ์มหาวิทยาลัย
Thai Environment
No abstract provided.
บทสัมภาษณ์ : นายเชาว์ แก้วประสิทธิ์ : ไร่นาสวนผสม, สิริพร แก่นสียา
บทสัมภาษณ์ : นายเชาว์ แก้วประสิทธิ์ : ไร่นาสวนผสม, สิริพร แก่นสียา
Thai Environment
No abstract provided.
การวิจัยถ่านชีวภาพที่ศูนย์วิจัยถ่านชีวภาพป่าเด็ง (Padeng-Biochar Research Center, Pd-Brc), ทวีวงศ์ ศรีบุรี
การวิจัยถ่านชีวภาพที่ศูนย์วิจัยถ่านชีวภาพป่าเด็ง (Padeng-Biochar Research Center, Pd-Brc), ทวีวงศ์ ศรีบุรี
Thai Environment
No abstract provided.
ฤาจะสิ้นลำตะคอง, เสาวนีย์ วิจิตรโกสุม
ผู้ครอบครองถ่านหินมือใหม่ ใส่ใจสิ่งแวดล้อม : กฎหมายและชุมชน, อุมาพร มุณีแนม
ผู้ครอบครองถ่านหินมือใหม่ ใส่ใจสิ่งแวดล้อม : กฎหมายและชุมชน, อุมาพร มุณีแนม
Thai Environment
No abstract provided.
Riparian Conundra, David Weaver
Riparian Conundra, David Weaver
Conference papers and presentations
Riparian vegetation is established or restored on the basis that it physically filters and traps hillslope derived particulate nutrients in surface runoff. Whilst many studies support this conventional model of riparian function, few test this models embedded assumptions. The assumptions are that catchments are surface runoff dominated, that most surface derived nutrients are transported in particulate form, and that riparian management targets locations that will result in the greatest change in water quality. This paper reviews studies in south west Western Australia that challenge these assumptions. Plots measuring leaching and runoff of nutrients showed that 20 times more water and …
Excitation-Induced Germanium Quantum Dot Formation On Si (100)-(2×1), Ali Oguz Er, Hani E. Elsayed-Ali
Excitation-Induced Germanium Quantum Dot Formation On Si (100)-(2×1), Ali Oguz Er, Hani E. Elsayed-Ali
Physics Faculty Publications
The effect of nanosecond pulsed laser excitation on the self-assembly of Ge quantum dots grown by pulsed laser deposition on Si (100)-(2×1) was studied. In situ reflection high-energy electron diffraction and ex situ atomic force microscopy were used to probe the quantum dot structure and morphology. At room temperature, applying the excitation laser decreased the surface roughness of the grown Ge film. With surface electronic excitation, crystalline Ge quantum dots were formed at 250 °C, a temperature too low for their formation without excitation. At a substrate temperature of 390 °C, electronic excitation during growth was found to improve the …
Measurement Of Single- And Double-Spin Asymmetries In Deep Inelastic Pion Electroproduction With A Longitudinally Polarized Target, H. Avakian, P. Bosted, V. D. Burkert, L. Elouadrhiri, K. P. Adhikari, M. Aghasyan, M. Amaryan, M. Anghinolfi, H. Baghdasaryan, J. Ball, G. Dodge, G. Gavalian, N. Guler, A. Klein, S E. Kuhn, D. Martinez, M. R. Niroula, F. Sabatié, H. Seraydaryan, S. Tkachenko, L. B. Weinstein
Measurement Of Single- And Double-Spin Asymmetries In Deep Inelastic Pion Electroproduction With A Longitudinally Polarized Target, H. Avakian, P. Bosted, V. D. Burkert, L. Elouadrhiri, K. P. Adhikari, M. Aghasyan, M. Amaryan, M. Anghinolfi, H. Baghdasaryan, J. Ball, G. Dodge, G. Gavalian, N. Guler, A. Klein, S E. Kuhn, D. Martinez, M. R. Niroula, F. Sabatié, H. Seraydaryan, S. Tkachenko, L. B. Weinstein
Physics Faculty Publications
We report the first measurement of the transverse momentum dependence of double-spin asymmetries in semi-inclusive production of pions in deep-inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Jefferson Lab (JLab). Modulations of single spin asymmetries over the azimuthal angle between lepton scattering and hadron production planes ϕ have been measured over a wide kinematic range in Bjorken x and virtual photon squared four-momentum Q2. A significant nonzero sin2ϕ single spin asymmetry was observed for the first time indicating strong spin-orbit correlations …
Parton Energy Loss In Heavy-Ion Collisions Via Direct-Photon And Charged-Particle Azimuthal Correlations, B. I. Abelev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, B. D. Anderson, D. Arkhipkin, G. S. Averichev, S. Bueltmann, I. Koralt, Star Collaboration
Parton Energy Loss In Heavy-Ion Collisions Via Direct-Photon And Charged-Particle Azimuthal Correlations, B. I. Abelev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, B. D. Anderson, D. Arkhipkin, G. S. Averichev, S. Bueltmann, I. Koralt, Star Collaboration
Physics Faculty Publications
Charged-particle spectra associated with direct photon Ydir) and π0 are measured in p+p and Au+Au collisions at center-of-mass energy √sNN=200 GeV with the STAR detector at the Relativistic Heavy Ion Collider. A shower-shape analysis is used to partially discriminate between Ydirand π0. Assuming no associated charged particles in the γdir direction (near side) and small contribution from fragmentation photons (Yfrag), the associated charged-particle yields opposite to Ydir(away side) are extracted. In central Au+Au collisions, the charged-particle yields at midrapidity (|η|<1) and high transverse momentum (3 < PTassoc < 16 GeV/c) associated with γdir and π0 (|η|<0.9, 8 < PTtrig <16 GeV/c) are suppressed by a factor of 3–5 compared with p+p collisions. The observed suppression of the associated charged particles is similar for Ydir and π0 and …16>0.9,>1)>
An Inventory And Condition Survey Of The Western Australian Part Of The Nullarbor Region, P A. Waddell, A K. Gardner, P Hennig
An Inventory And Condition Survey Of The Western Australian Part Of The Nullarbor Region, P A. Waddell, A K. Gardner, P Hennig
Technical Bulletins
The inventory and condition survey of the Western Australian part of the Nullarbor region, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 2005 and 2007, describes and maps the natural resources of the region. This survey report provides a baseline record of the existence and condition of the area's natural resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The Nullarbor region has …
Applications Of Spoke Cavities, Jean R. Delayen
Applications Of Spoke Cavities, Jean R. Delayen
Physics Faculty Publications
The superconducting spoke cavity was introduced in the late 1980s in response to the need for superconducting structures in the mid-velocity range. Since then it has found application in many projects. Prototypes have been developed for a wide range of beam velocities. The characteristics and features of the spoke cavity are reviewed and some of their applications are presented.
Search For Gravitational-Wave Bursts Associated With Gamma-Ray Bursts Using Data From Ligo Science Run 5 And Virgo Science Run 1, B. P. Abbott, R. Abbott, F. Acernese, R. Adhikari, P. Ajith, B. Allen, G. Allen, M. Alshourbagy, R. S. Amin, S. B. Anderson, W. G. Anderson, F. Antonucci, S. Aoudia, M. A. Arain, M. Araya, H. Armandula, P. Armor, K. G. Arun, Y. Aso, S. Aston, P. Astone, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, G. Ballardin, S. Ballmer, C. Barker, D. Barker, F. Barone
Search For Gravitational-Wave Bursts Associated With Gamma-Ray Bursts Using Data From Ligo Science Run 5 And Virgo Science Run 1, B. P. Abbott, R. Abbott, F. Acernese, R. Adhikari, P. Ajith, B. Allen, G. Allen, M. Alshourbagy, R. S. Amin, S. B. Anderson, W. G. Anderson, F. Antonucci, S. Aoudia, M. A. Arain, M. Araya, H. Armandula, P. Armor, K. G. Arun, Y. Aso, S. Aston, P. Astone, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, G. Ballardin, S. Ballmer, C. Barker, D. Barker, F. Barone
Physics and Astronomy Faculty Publications and Presentations
We present the results of a search for gravitational-wave bursts (GWBs) associated with 137 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments during the fifth LIGO science run and first Virgo science run. The data used in this analysis were collected from 2005 November 4 to 2007 October 1, and most of the GRB triggers were from the Swift satellite. The search uses a coherent network analysis method that takes into account the different locations and orientations of the interferometers at the three LIGO-Virgo sites. We find no evidence for GWB signals associated with this sample of GRBs. …
Physics Of Luminescence Nanomaterials, Boon Kuan Woo
Physics Of Luminescence Nanomaterials, Boon Kuan Woo
Physics Dissertations
Luminescence oxide nanoparticles have tremendous potential in revolutionizing many interesting applications in today's emerging cutting-edge optical technology such as solid state lighting, biomedical labeling, imaging, photodynamic activation and radiation detection. In the early parts of this thesis, we synthesized two types of luminescence oxide nanoparticles, namely zinc oxide and gadolinium oxide in the hope of investigating their optical properties and to gain a deeper understanding in determining the relationship in between the ZnO's surface defect emission and its excitonic emission. We also investigated the luminescence properties of rare-earth dopants such as Ce³⁺ and Eu³⁺ doped into the host gadolinium oxide …
Synthesis Of Cdte And Pbs Semiconductor Quantum Dots And Their Biological And Photochemical Applications, Xing Zhang
Synthesis Of Cdte And Pbs Semiconductor Quantum Dots And Their Biological And Photochemical Applications, Xing Zhang
Physics Theses
Semiconductor quantum dots are inorganic nanoparticles with unique photophysical properties. In particular, water soluble quantum dots which have been synthesized by colloidal chemistry in aqueous environment are highly luminescent. Their huge absorption cross sections, tunable, narrow emission bands and effectiveness of surface functionality have stimulated these luminescent probes in various applications like biological sensors as well as imaging contrast agents. In this paper we will discuss several aspects about the synthesize processes of the water soluble, highly luminescent type of CdTe quantum dots and its near infrared counterpart HgxCd1-xTe, the extremely crystallized PbS quantum dots with the application of the …
Tracking Stellar Activity Enhancements Due To A Close-In Giant Planet In The Hd 179949 System, Levent Gurdemir
Tracking Stellar Activity Enhancements Due To A Close-In Giant Planet In The Hd 179949 System, Levent Gurdemir
Physics Theses
We monitored CaII H and K lines (3933Å and 3968Å) of the HD 179949 system to study Planet Induced Emission (PIE) as an effect of star-planet interaction. We obtained high resolution spectra (R > 50,000) with high signal-to-noise ratio (S/N > 50 in the Ca II H and K cores) during 10 nights of observation at the McDonald Observatory. Wide band Echelle spectra covering full optical bandwidth (3,400-10,900Å) were obtained using 2.7 m Harlan J. Smith Telescope located at Mt. Locke. Detailed statistical analyses performed both for H and K cores of calcium to reveal the nature of the fluctuation in the …
Searches For Gravitational Waves From Known Pulsars With Science Run 5 Ligo Data, B. P. Abbott, R. Abbott, F. Acernese, R. Adhikari, P. Ajith, B. Allen, G. Allen, M. Alshourbagy, R. S. Amin, S. B. Anderson, W. G. Anderson, F. Antonucci, S. Aoudia, M. A. Arain, M. Araya, H. Armandula, P. Armor, K. G. Arun, Y. Aso, S. Aston, P. Astone, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, G. Ballardin, S. Ballmer, C. Barker, D. Barker, F. Barone
Searches For Gravitational Waves From Known Pulsars With Science Run 5 Ligo Data, B. P. Abbott, R. Abbott, F. Acernese, R. Adhikari, P. Ajith, B. Allen, G. Allen, M. Alshourbagy, R. S. Amin, S. B. Anderson, W. G. Anderson, F. Antonucci, S. Aoudia, M. A. Arain, M. Araya, H. Armandula, P. Armor, K. G. Arun, Y. Aso, S. Aston, P. Astone, P. Aufmuth, C. Aulbert, S. Babak, P. Baker, G. Ballardin, S. Ballmer, C. Barker, D. Barker, F. Barone
Physics and Astronomy Faculty Publications and Presentations
We present a search for gravitational waves from 116 known millisecond and young pulsars using data from the fifth science run of the LIGO detectors. For this search, ephemerides overlapping the run period were obtained for all pulsars using radio and X-ray observations. We demonstrate an updated search method that allows for small uncertainties in the pulsar phase parameters to be included in the search. We report no signal detection from any of the targets and therefore interpret our results as upper limits on the gravitational wave signal strength. The most interesting limits are those for young pulsars. We present …
Campanian Pseudosabinia From The Pučišća Formation On The Island Of Hvar (Adriatic Sea, Croatia), Tvrtko Korbar, Blanka Cvetko Tesovic, Ivo Radovanovic, Katarina Krizmanic, Thomas Steuber, Peter W. Skelton
Campanian Pseudosabinia From The Pučišća Formation On The Island Of Hvar (Adriatic Sea, Croatia), Tvrtko Korbar, Blanka Cvetko Tesovic, Ivo Radovanovic, Katarina Krizmanic, Thomas Steuber, Peter W. Skelton
Turkish Journal of Earth Sciences
The Upper Cretaceous carbonates on the Island of Hvar were deposited within the central Tethyan, intra-oceanic Adriatic carbonate platform (s. str). The Upper Cretaceous stratigraphy of the platform has been described in detail from the neighbouring island of Brac. Following the intra-platform deeper-water carbonate sedimentation of the Dol Formation, the Campanian Pucisca Formation (the Brač 'Marbles' unit) in the area of the town of Hvar are characterized by massive bioclastic rudist-bearing carbonates deposited in relatively deeper subtidal environments. Within the uppermost part of the Pucisca Formation we recognized massive rudist valves, characterized by a complex canaliferous inner shell structure, and …