Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 92 for “"SDSS"”.
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The XMM-Newton/SDSS galaxy cluster survey
… In my thesis I have conducted the 2XMMi/SDSS galaxy cluster survey, which is a serendipitous search for galaxy clusters based on the X-ray extended sources in the XMM-Newton Serendipitous Source Catalogue (2XMMi-DR3). The main aims of the survey are to identify new X-ray galaxy clusters, …
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The Optical Variability of Quasars as Seen by SDSS
… assembled by the Sloan Digital Sky Survey (SDSS). This database is an excellent data set to study quasar variability, and includes 9,000 well-sampled light curves from Stripe 82 and a 25,000-object two-epoch sample from the northern Galactic sky. I show that the damped random walk model …
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The core collapse supernova rate in the sdss-ii supernova survey
… Sloan Digital Sky Survey II Supernova Survey (SDSS-II SN), though designed as a type Ia supernova search for cosmology, also discovered a large sample of core collapse supernovae (CCSN). I use the SDSS-II SN data to measure the volumetric CCSN rate in the redshift range (0.03 < z < 0.09), …
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Investigating the Environmental Properties of Galaxies in the SDSS-MaNGA Survey
… and velocity dispersion of 124,524 galaxies from SDSS DR7; I estimate star formation rates using H<sub>α</sub> and D<sub>n</sub>4000 for galaxies in the MaNGA survey; a study of the spatial distribution of star formation in 1494 MaNGA galaxies; and finally, a study of 215 barred and 402 unbarred …
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An emergency preparedness framework for Sand andDust Storms (SDSs) in Kuwait
… preparedness framework for Sand and Dust Storms (SDSs) globally and regionally and the existing disaster response strategies are not fit for purpose. Evidence suggests that research is warranted in this area. Thus, this research aims to investigate and develop the emergency preparedness framework …
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Measurements and implications of the SDSS DR7 galaxy angular power spectrum
… selected from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) by using a quadratic estimation method with KL-compression. The primary data sample includes over 18 million galaxies covering more than 5,700 square degrees after masking areas with bright objects, reddening greater than …
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Understanding Type Ia Supernovae Through Their Host Galaxies Using the SDSS-II Supernova Survey
… the full three-year Sloan Digital Sky Survey II (SDSS-II) Supernova Survey and multi-wavelength photometry of their host galaxies to find evidence of a correlation between supernova luminosities and the age of their hosts, a possible proxy for progenitor age. I also detail a method of host galaxy …
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Developing a spatial decision support system for timber sale planning on a national forest
… a prototype spatial decision support system (SDSS) was developed that integrates the data, GIS analysis routines, graphical map and tabular displays, and user interface utilities to interactively support the timber sale planning process. The objectives of this research are: (1) to model the …
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Searching for Interacting Early Type Galaxies at Late Cosmic Times
… z ≤ 0.12 selected from the Yang et al. (2007) SDSS Galaxy Group Catalog and analyzed for residual asymmetric features in SDSS r-band images provided a lower limit to the frequency of massive pairs with interaction signatures residing in groups and clusters with halo masses M[subscript halo] ≥ …
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A Spatial Decision Support System for Planning Broadband, Fixed Wireless Telecommunication Networks
… network and to implement that knowledge into an SDSS. Intermediate steps toward this goal include solutions to both fixed wireless point-to-multipoint (PMP) and fixed wireless mesh networks, which are developed and incorporated into the SDSS. This study explores the use of a Spatial Decision …
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N(th)-Order Correlation Functions of Galaxies From the Sloan Digital Sky Survey
… measurements and analysis I have conducted with SDSS data. I have focused my measurements on angular N-point area-averaged correlation functions (o N(theta)) and auto-correlation functions (o2 (theta)) of galaxies. The measured o N(theta) are used to calculate the projected, s N, and real space, …
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Bulges and Disks in the Nearby Universe: Applications to Evolution and Formation of Galaxies
… drawn from the Sloan Digital Sky Survey (SDSS) Data Release 7. Fits are performed for the SDSS r-band utilizing the fitting routine Galfit and analysis pipeline PyMorph. Simulations are used to test the two-dimensional decompositions of SDSS galaxies. We compare these fits to prior …
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Web 2.0-based Collaborative Multicriteria Spatial Decision Support System: A Case Study of Human-Computer Interaction Patterns
… Spatial Decision Support System (MC-SDSS) with which to involve the public, or a particular group of individuals, in collaborative spatial decision making. Understanding how decision makers acquire and integrate decision-related information within the Web 2.0-based collaborative …
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Design and evaluation of a list gathering tool in a web-based collaborative environment
… in a Web-based Social Decision Support System (SDSS) Toolkit. Then, a two-by-two factorial design (list tool support vs. no list tool support, and voting tool support vs. no voting tool support, respectively) controlled experiment and several field studies were carried out to assess the effects …
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Black hole masses and host galaxy properties in distant quasars from reverberation mapping surveys
… Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project is one of the first large-scale RM campaigns to simultaneously monitor 849 uniformly selected quasars over a broad luminosity (i-mag<21.7) and redshift (0.1<z<4.5) range, which significantly expands the AGN parameter space for which …
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The Origins and Environments of Quasar Absorption Lines in the Sloan Digital Sky Survey
… surveys such as the Sloan Digital Sky Survey (SDSS), tens of thousands of quasar absorption line (QAL) systems have been identified to date. QAL catalogs currently extend to z ∼ 4.6 and provide unique probes of the large scale structure of baryonic matter in the high-redshift universe; yet …
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Missing channel reconstruction for sloan digital sky survey images using linear models and generative adversarial networks
The Sloan Digital Sky Survey (SDSS) dataset, one of the largest astronomical surveys, suffers from noise and missing information in some of the image channels. This thesis implements two methods—the linear model and the deep learning model—on 12,730 SDSS images for missing channel re- construction. …
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Public Housing Tenant Relocation: Residential Mobility, Satisfaction, and the Development of a Tenant's Spatial Decision Support System.
… A prototype Spatial Decision Support System (SDSS) is constructed to allow relocating tenants to participate in their own relocation decision process. This SDSS allows local, spatially referenced information to be combined with each tenants own expert knowledge. This information is combined …
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Galaxy Formation in the Lambda-Cold Dark Matter Cosmology
… observations from the Sloan Digital Sky Survey (SDSS). I use two different variants of the model, Baugh et al (2005), which assumes a top-heavy initial mass function (IMF) in starbursts and superwind feedback, and Bower et al (2006), which incorporates AGN feedback with a standard IMF. I compare …
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Connecting simulations and observations in galaxy formation studies
… with data from the Sloan Digital Sky Survey (SDSS). We use techniques to obtain the observables as similar as possible to the ones applied in SDSS, with the aim of making an unbiased comparison between our set of hydrodynamical simulations and SDSS observations. We quantify the differences in …
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