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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 11 to 20 of 20 (0.017 seconds)| 11 |
Evaluating water quality and biotic indices in the Lower Little Bow River, AlbertaScott, Janet L Unknown Date
No description available.
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Using Landscape Variables to Assess Stream Health in Ohio's Western Allegheny PlateauKing, Lisa A. 25 April 2008 (has links)
No description available.
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A Low Complexity Cyclic Prefix Reconstruction Scheme for Single-Carrier Systems with Frequency-Domain EqualizationHwang, Ruei-Ran 25 August 2010 (has links)
The cyclic prefix (CP) is usually adopted in single carrier frequency domain equalization (SC-FDE) system to avoid inter-block interference (IBI) and inter-symbol interference (ISI) in multipath fading channels. In addition, the use of CP also converts the linear convolution between the transmitted signal and the channel into a circular convolution, leading to significant decrease in receiver equalization.
However, the use of CP reduces the bandwidth efficiency. Therefore the SC-FDE system without CP is investigated in this thesis. A number of schemes have been proposed to improve the performance of systems without CP, where both IBI and ICI are dramatically increased. Unfortunately, most of the existing schemes have extremely high computational complexity and are difficult to realize. In this thesis, a novel low-complexity CP reconstruction (CPR) scheme is proposed for interference cancellation, where the successive interference cancellation (SIC) and QR decomposition (QRD) are adopted. In addition, the system performance is further improved by using the fact that the
interferences of different symbols are not the same. Simulation experiments are conducted to verify the system performance of the proposed scheme. It is shown that the proposed scheme can effectively reduce the interference, while maintain a low computational complexity.
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Investigation on the Frequency Domain Channel Equalization and Interference Cancellation for Single Carrier SystemsChan, Kuei-Cheng 11 August 2008 (has links)
In the single carrier systems with cyclic-prefix (CP), the use of CP does not only eliminate the inter-block interference (IBI), but also convert linear convolution of the transmitted signal with the channel into circular convolution, which leads to the computation complexity of the frequency domain equalization (FDE) at the receiver is reduced. Unfortunately, the use of CP considerably decreases the bandwidth utilization. In order to increase the bandwidth utilization, the single carrier systems with frequency domain equalization (SC-FDE) is investigated. When FDE is used in a single carrier system without CP, the IBI is induced by the modulated symbols and then the bit-error rate (BER) is increased. To reduce the interference and then improve the system performance, a novel interference cancellation scheme is proposed in this thesis. After FDE, it is shown that interference is induced from the right end of a time domain signal block and most of the interference is located at both ends of an equalized time domain signal block. Based on this observation, the modulated symbols which induce the interference are detected according to the maximum-likelihood (ML) principle and then the interference is regenerated and eliminated. For simplifying the computation complexity, we further propose a successive interference cancellation scheme, which is implemented by using the Viterbi algorithm. The simulation results demonstrate that the proposed scheme improves BER performance significantly in SC-FDE systems. In addition, the proposed architecture has comparable BER performance with the SC-CP systems when the multi-path channel is exponentially decayed.
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Partiendo de ibi: La traducción del antiguo adverbio pronominal enlas primeras Biblias romanceadas castellana e italianaa partir de la VulgataVazquez, Luis Fernando 01 June 2015 (has links) (PDF)
Usando el Corpus de la Biblia Medieval como herramienta principal, el presente trabajo explora el desaparecido adverbio pronominal y (hy, hi, i) en castellano a través de la comparación de la traducción del adverbio locativo ibi del latín al castellano e italiano usando la Vulgata, la Biblia prealfonsí y la Biblia del Malermi. Los resultados muestran que el adverbio pronominal en castellano no es el predilecto de la traducción y sin embargo es amplia y libremente usado en el texto castellano sin necesidad de tener un equivalente adverbial en latín. Dicha discrepancia se puede explicar considerando la ley Tobler-Mussafia que no le permite al adverbio pronominal introducir oraciones independientes como clítico. Sin embargo, es su flexibilidad como clítico la que le permite ocupar cualquier posición en el sintagma verbal. Dicha característica no la refleja el equivalente en italiano ivi, el cual tiende a comportarse más como adverbio. En la comparación de los tres textos, es el castellano el más leal a la sintaxis del latín en el uso del adverbio con respecto a su posición con el verbo.
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The role of sampling density in the accuracy of water quality assessment: A case study of 9 Ohio watersheds and the Wadeable Streams AssessmentPeterson, Sarah Jonell 17 August 2011 (has links)
No description available.
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Streamwater and Sediment Chemistry of Ohio's Western Allegheny Plateau Ecoregion and their Relation to Aquatic LifeAmaning, Kwarteng, Jr 26 September 2006 (has links)
No description available.
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IMPORTANCE OF TOTAL SUSPENDED SOLIDS IN EXPLAINING FISH COMMUNITY STRUCTURE IN AGRICULTURAL HEADWATER STREAMSJennifer L Troy (7042787) 16 October 2019 (has links)
<div>Agricultural headwater streams in the Midwestern United States are subject to contaminants from fields, increased sedimentation, and degradation of natural habitat. Previous research has shown that physical instream habitat degradation better explained variation in fish community structure than water chemistry. However, these studies did not include total suspended solids (TSS), which are considered a major freshwater contaminant. The objective of this study is to determine whether total suspended solids better explains fish community structure than other variables in agricultural headwater streams. Mixed linear effects modeling was used to determine the set of independent variables that best predicts each of the fish response variables of species richness, Shannon diversity index, fish density, and index of biotic integrity. Standardized coefficients were used to determine which independent variable in each of the models had the largest influence on fish response metrics. The set of independent variables that best explained species richness were mean total suspended solids, imidacloprid, discharge, and substrate richness. Shannon diversity index was explained best by the combination of maximum total suspended solids, mean total suspended solids, atrazine, total nitrogen, and discharge. Fish density was explained best by the percentage of silt and clay, dissolved oxygen, the percentage of canopy cover, cover type richness, and discharge. IBI was explained best by the combination of the percentage of silt and clay, total phosphorus, mean total suspended solids, and dissolved oxygen. Total suspended solids was the most influential independent variable for fish species richness and Shannon diversity, however the percentage of silt and clay in benthic sediments was the most influential independent variable for fish density and IBI. Results also indicate discharge and total phosphorus as being influential to fish community metrics. The results from this study suggest that models containing a combination of different types of independent variables best explain fish community structure. This study supports the use of conservation and restoration practices that reduce total suspended solids and the amount of silt and clay present in bed sediments to increase fish community integrity of agricultural headwater streams of the Midwestern United States.</div>
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Dvoufázový systém stabilizace podloží vozovek / Double-stage system of subgrade stabilizationŠvarcová, Monika January 2019 (has links)
This diploma thesis is focused on the properties of unsuitable and conditionally unsuitable fine-grained soils after a one-stage or two-stage treatment by using a binder. The theoretical part occupies with problematical properties of the fine grained soils in a subgrade and a possible technology of the change of these properties. The laboratory testing of treated soils is described and a practical technology of the one stage and two-stage stabilization. In the practical part the fine grained soils are treated by one-stage or two-stage stabilization. For the one stage stabilization the cement is used, for the two-stage stabilization the properties of the soil are improved by lime and then the soil is stabilized by cement. The treated soils are laboratory tested, the initial bearing index IBI, California bearing ratio CBR, unconfined compressive strength and frost susceptibility is tested. Based on the results of the laboratory tests the benefit of the two-stage stabilization is measured.
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The Effect of Dredging on Fish Communities in Agricultural Streams in Crawford, Sandusky and Seneca Counties of Ohio.Selden, Justin D. 27 November 2013 (has links)
No description available.
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