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  • About
  • 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.
131

Městské regiony v kontextu kohezní politiky EU

Romanová, Martina January 2006 (has links)
Hlavním cílem této práce je přiblížení problematiky městských regionů a ověření předpokladu, zda jejich podpora ze strukturálních fondů EU ? při respekto- vání principu udržitelného rozvoje ? má potenciál pro ekonomický růst ČR. Jde tedy o analýzu celkových cílů a možností rozvoje městských regionů v kohezní politice EU v období 2007-2013 na základě zkušeností podobně zaměřených podpor, které proběhly např. i ve Velké Británii.
132

EXPLORING MESH NETWORKS WITH INET RADIOS

Newton, Todd A., Timme, M. Wayne, Abbott, Ben A. 11 1900 (has links)
The integrated Network Enhanced Telemetry (iNET) radios provide a two-way telemetry link that interconnects the airborne instrumentation system with ground-based systems. This capability brings the flight test telemetry domain into the realm of the more classic mesh networks in a mobile ad-hoc environment. The underlying radio frequency (RF) communication protocols defined in the iNET standards support a variety of classic networking protocols. The scheduling algorithms between Link Managers and radios can operate as a collision network, like classic Ethernet. This paper describes the communication protocols and scheduling algorithms of the iNET radios, and it provides results of their use in a self-scheduling algorithm such as a classical token ring network.
133

Physical-Layer Network Coding for MIMO Systems

Xu, Ning 05 1900 (has links)
The future wireless communication systems are required to meet the growing demands of reliability, bandwidth capacity, and mobility. However, as corruptions such as fading effects, thermal noise, are present in the channel, the occurrence of errors is unavoidable. Motivated by this, the work in this dissertation attempts to improve the system performance by way of exploiting schemes which statistically reduce the error rate, and in turn boost the system throughput. The network can be studied using a simplified model, the two-way relay channel, where two parties exchange messages via the assistance of a relay in between. In such scenarios, this dissertation performs theoretical analysis of the system, and derives closed-form and upper bound expressions of the error probability. These theoretical measurements are potentially helpful references for the practical system design. Additionally, several novel transmission methods including block relaying, permutation modulations for the physical-layer network coding, are proposed and discussed. Numerical simulation results are presented to support the validity of the conclusions.
134

Fossils of the distant Galaxy: NGC 5466 and its stellar stream

Jensen, Jaclyn 07 December 2020 (has links)
The stellar halo of the Milky Way is populated by mostly old and metal-poor stars. As dynamical timescales are of order ~Gyrs at these large distances, accreted stellar substructures, such as dwarf galaxies or globular clusters, survive here as coherent entities longer than anywhere else in the Galaxy. These substructures represent our “fossil record” which can be used to reconstruct the Galaxy’s complex past. In this work, we seek to identify the structures found in the far reaches of the stellar halo as a step towards a correct interpretation of this fossil record. The advent of all-sky surveys in the Gaia era has ignited a prosperous period for this field of Galactic archaeology, but exploring the distant Milky Way (>10 kpc) with Gaia is difficult. Parallax measurements are much less accurate beyond the Solar neighborhood, though Gaia’s proper motions remain useful out to large radii. To push Gaia into the distant Galaxy, we combined these astrometric data with u-band photometry from the Canada-France Imaging Survey (CFIS). We exploited CFIS’ excellent photometric quality and depth (which extends 3 magnitudes deeper than that of the Sloan Digital Sky Survey) to use blue horizontal branch stars (BHBs) as a tracer population with well-measured distances. We first examined the distribution of BHBs using the OPTICS (Ordering Points To Identify the Clustering Structure) clustering algorithm to visualize the hierarchical nature of outer halo substructure. We then identified several well-known satellites, including a group of stars in the vicinity of a distant globular cluster (NGC 5466). Analysis of their kinematics suggested a few of these BHBs outside the cluster’s tidal radius were co-moving with NGC 5466, implying they may be tidal debris from this system. Interestingly, a stream had previously been detected extending from this globular cluster. However, its properties had not been studied in the decade since its discovery, and previous dynamical models were unable to reproduce many of the reported features. As one of the (allegedly) longest globular cluster streams on the sky - and given its distance and utility to constrain the Milky Way’s mass at large Galactic radius - we sought to explore this structure further. We subsequently used red giant branch stars (RGBs) identified in CFIS to try to better quantify the characteristics of the putative stream. We were able to filter these data and obtain a sample of stars that are fully consistent with stream membership and which span approximately 31 degrees of sky. Combined with the BHBs, we used these populations to trace the path of the stream, its distance and distance gradient across the stream’s longitude, and additionally estimated a lower limit to the stream’s luminosity. Our measurements suggest that the stream is at least 11% of the luminosity of the cluster. We then compared our observational data to dynamical models, which showed generally good agreement with the observed stream. This success reflects the updated properties of data measured in this work, and the inclusion of new data (especially proper motions). Our model suggests that the pericenter and apocenter of NGC 5466's orbit are 6.4 and 43 kpc, respectively, resulting in a very eccentric orbit (ε = 0.74). We also find evidence that the cluster experienced a recent interaction (within the past ~100 Myrs) with the Galactic disk, suggesting that the primary source of mass loss in this system may be caused by disk-shocking. The NGC 5466 stellar stream also exhibits an interesting heliocentric gradient in the leading arm, which our simplistic spherical halo model does not fully reproduce. Dynamical experiments with various halo shapes fit to this stream will prove interesting for future work. For local cosmology in particular, long, thin, dynamically cold stellar streams are ideal systems for constraining properties of the Milky Way’s dark matter halo, and streams at large radius are especially useful for measuring the Galaxy's mass interior to the stream. In this respect, we anticipate that NGC 5466 will be exceptionally useful as a probe of the shape, mass, and dark substructure of the Milky Way's distant dark matter halo. / Graduate
135

Pasivní kmitočtové výhybky pro dvoupásmové reproduktorové soustavy / Passive Frequency Crossover for Two-Way Loudspeaker Systems

Vydarený, Ján January 2020 (has links)
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136

Hierarchical Alignment of Tuples in Databases for Fast Join Processing

Alqahatni, Zakyah 01 December 2019 (has links)
Data is distributed across interconnected relations in relational databases. Relationships between tuples can be rearranged in distinct relations by matching the values of the join attribute, a process called equi-join operation. Unlike standard attempts to design efficient join algorithms in this thesis, an approach is proposed to align tuples in relation so that joins can be readily and effectively done. We position tuples in their respective relationships, called relations alignment, which has matching join attribute values in the corresponding positions. We also address how to align relations and perform joins on aligned relations. The experiments were conducted in this research to measure and analyze the efficiency of the proposed approach compared to standard MySQL joins.
137

Deliberative Democracy: John Dewey and Alasdair MacIntyre

Lee, Chanhee 01 June 2021 (has links)
Authoritarianism is on the rise across the world and intriguingly in the United States, known as the democratic laboratory. Political theorists and activists inquire into this contradictory political phenomenon in the United States, but their inquiries are fruitless. This dissertation finds that they uncritically conceive democracy as a mechanism of governance. As such, this narrow conception hampers their intelligence for political inquiries into the surge of authoritarianism in America. This dissertation discusses why and how the current political phenomenon occurs and suggests a moral method to pursue the quest for democratic values. This method allows inquirers to successfully address the crisis of democracy. This dissertation appeals to John Dewey’s vision of deliberative democracy, comparing and contrasting it with Alasdair MacIntyre’s communitarianism-oriented political theory. It finds that just as the Deweyan democratic vision does, MacIntyre’s political vision of democracy, too, emphasizes citizens’ participation in the political activities of decision-making and policy formulation. For MacIntyre, deliberative and participatory citizens are engaged in small group meetings to resolve their social and political issues. However, his communitarian method falls short of inspiring inquirers who wish to establish meaningful hypotheses to overcome the crisis of democracy: the idea of value plurality that is deemed essential for the political hypotheses is negated to a substantial degree by Thomist humanism held in his later works. MacIntyre’s skeptical attitude toward the methodology of democracy fundamentally based on liberalism and empirical naturalism inhibits political inquiries to discover and apply methods required to resolve the existing political situation in the U.S. By contrast, Dewey provides an appropriate array of philosophical ideas concerning deliberative democracy based on cooperative intelligence for political inquirers. With Dewey’s thought-provoking philosophical ideas, they are prepared to address their recently revived interest in authoritarianism in politics. They open a path towards a way of life that promotes authentic participation and deliberation in public affairs to tackle complex policy issues and bring out human flourishing. On this moral and social path, people demolish authoritarianism. Democratic hope is no longer an unattainable dream.
138

An Examination of Nonverbal Cues Used By University Professors When Delivering Instruction in a Two-Way Video Classroom

Anderson, Myron R. 10 December 2001 (has links)
As the education field further embraces technology and the classroom develops a distance component, more and more colleges and universities are delivering classes via two-way video. Research has established that nonverbal cues exist and play a significant role in classroom instruction (Arnold & Roach, 1989; Cyrs, Conway, Shonk, & Jones, 1997; Rosenthal & Jacobson, 1968). The growing popularity of two-way video and the fundamental concepts of communication, establishes a parallel between traditional classroom and two-way video instruction delivery. This parallel and the established effect that nonverbal cues have on instructional delivery support the need to study nonverbal communication in a two-way video classroom. Descriptive observation of six instructors, each teaching five 50-minute lectures, produced the data for this preliminary study. The nonverbal cues were recorded using the Two-way Video Nonverbal Cue Observation Instrument (TV-NCOI). The TV-NCOI consisted of seven nonverbal communication categories and 22 variables used to identify and quantify professor's nonverbal cue use in two-way video instructional delivery. Frequency response, common themes, and nonverbal cue delivery observations, collected by the TV-NCOI, were used to answer the research questions; what nonverbal cues are used by university professors when delivering instruction in a two-way video classroom? The results suggest that professors in engineering and chemistry, the two focused disciplines, heavily used nonverbal cues when delivering instruction in a two-way video classroom. However, the majority of these cues have a technical delivery base. The traditional classroom nonverbal cues of board pointing, material pointing, and accent gestures are delivered via computer cursor, two-way video camera, and software applications in the two-way video classroom. More specifically, 87% on the nonverbal cues used in instructional delivery had a technological connection and only 13% of the nonverbal cues used were without a technical delivery base. / Ph. D.
139

Study on CuO-CeO2 System to develop new Three-Way Catalysts / 新型三元触媒開発のためのCuO-CeO2系触媒に関する研究

Nguyen The Luong 23 May 2013 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(エネルギー科学) / 甲第17795号 / エネ博第278号 / 新制||エネ||58(附属図書館) / 30602 / 京都大学大学院エネルギー科学研究科エネルギー社会・環境科学専攻 / (主査)教授 石原 慶一, 教授 東野 達, 准教授 奥村 英之 / 学位規則第4条第1項該当 / Doctor of Energy Science / Kyoto University / DFAM
140

Acquisition of Right of Way for highway construction

Aleithawe, Imad 01 May 2010 (has links)
A key element in moving highway construction projects forward is the ability to acquire the Right of Way (ROW) in a timely manner. Delay in the acquisition process due to multitude of causes will usually lead to major construction phase delays. Identifying the delay factors allows for better time management of the process. A detailed review of the acquisition process at the Mississippi Department of Transportation (MDOT) is used as an example. Reviews of the process in neighboring states are also presented in order to determine other current practices and their likely impact on the acquisition duration. Descriptive and multivariable regression analysis of 35 randomly selected highway projects identified three variables “condemnation”, “number of parcels” and “revisions of plans” for the increase of acquisition duration. Using recognized software with analysis of variance stepwise regression a prediction model is developed and tested for the prediction of acquisition duration. These findings with new processes (forms) and an enhanced flow chart using current information technology procedures are introduced to reduce condemnation cases and to enhance the acquisition process.

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