Aqueous solution chemistry of molybdenum tungsten and ruthenium

First paragraph. Abstract is available in full-text thesis file. Although elements of the second and third row transition metals do form simple monomeric aqua ions …, a more common feature of their aqueous chemistry is the formation of oligomeric species with metal-metal bonding and oxo, hydroxo and/or halo bridges. These are often called aqua ions but by strict definition they are oxo species. The availability of such aqua ions plays an important role in the chemistry of the corresponding element as they are viewed as being the simplest of complexes and can be frequently more labile than other complexes (e.g. halogeno-complexes) thus opening synthetic routes to compounds including organometallic ones not available otherwise

Contribution to Efficient Use of Narrowband Radio Channel

Předkládaná práce se soustředí na problematiku využívání úzkopásmového rádiového kanálu rádiovými modemy, které jsou určené pro průmyslové aplikace pozemní pohyblivé rádiové služby, specifikované v dominantní míře Evropským standardem ETSI EN 300 113. Tato rádiová zařízení se používají v kmitočtových pásmech od 30 MHz do 1 GHz s nejčastěji přidělovanou šířkou pásma 25 kHz a ve většině svých instalací jsou využívána ve fixních nebo mobilních bezdrátových sítích. Mezi typické oblasti použití patří zejména datová telemetrie, aplikace typu SCADA, nebo monitorování transportu strategických surovin. Za hlavní znaky popisovaného systému lze označit komunikační pokrytí značných vzdáleností, dané především vysokou výkonovou účinnosti datového přenosu a využívaní efektivních přístupových technik na rádiový kanál se semiduplexním komunikačním režimem. Striktní požadavky na elektromagnetickou kompatibilitu umožňují těmto zařízením využívat spektrum i v oblastech kmitočtově blízkým jiným komunikačním systémům bez nutnosti vkládání dodatečných ochranných frekvenčních pásem. Úzkopásmové rádiové komunikační systémy, v současnosti používají převážně exponenciální digitální modulace s konstantní modulační obálkou zejména z důvodů velice striktních omezení pro velikost výkonu vyzářeného do sousedního kanálu. Dosahují tak pouze kompromisních hodnot komunikační účinnosti. Úpravy limitů příslušných rádiových parametrů a rychlý rozvoj prostředků číslicového zpracování signálu v nedávné době, dnes umožňují ekonomicky přijatelné využití spektrálně efektivnějších modulačních technik i v těch oblastech, kde je prioritní využívání úzkých rádiových kanálů. Cílem předkládané disertační práce je proto výzkum postupů směřující ke sjednocení výhodných vlastností lineárních a nelineárních modulací v moderní konstrukci úzkopásmového rádiového modemu. Účelem tohoto výzkumu je efektivní a „ekologické“ využívání přidělené části frekvenčního spektra. Mezi hlavní dílčí problémy, jimiž se předkládaná práce zabývá, lze zařadit zejména tyto: Nyquistova modulační filtrace, navrhovaná s ohledem na minimalizaci nežádoucích elektromagnetických interferencí, efektivní číslicové algoritmy frekvenční demodulace a rychlé rámcové a symbolové synchronizace. Součástí práce je dále analýza navrhovaného řešení z pohledu celkové konstrukce programově definovaného rádiového modemu v rovině simulací při vyšetřování robustnosti datového přenosu rádiovým kanálem s bílým Gaussovským šumem nebo kanálem s únikem v důsledku mnohacestného šíření signálu. Závěr práce je pak zaměřen na prezentování výsledků praktické části projektu, v níž byly testovány, měřeny a analyzovány dvě prototypové konstrukce rádiového zařízení. Tato finální část práce obsahuje i praktická doporučení, vedoucí k vyššímu stupni využitelnosti spektrálně efektivnějších komunikačních režimů v oblasti budoucí generace úzkopásmových zařízení pozemní pohyblivé rádiové služby.he industrial narrowband land mobile radio (LMR) devices, as considered in this dissertation project, has been subject to European standard ETSI EN 300 113. The system operates on frequencies between 30 MHz and 1 GHz, with channel separations of up to 25 kHz, and is intended for private, fixed, or mobile, radio packet switching networks. Data telemetry, SCADA, maritime and police radio services; traffic monitoring; gas, water, and electricity producing factories are the typical system applications. Long distance coverage, high power efficiency, and efficient channel access techniques in half duplex operation are the primary advantages the system relays on. Very low level of adjacent channel power emissions and robust radio receiver architectures, with high dynamic range, enable for a system’s coexistence with various communication standards, without the additional guard band frequency intervals. On the other hand, the strict limitations of the referenced standard as well as the state of the technology, has hindered the increase in communication efficiency, with which the system has used its occupied bandwidth. New modifications and improvements are needed to the standard itself and to the up-to-date architectures of narrowband LMR devices, to make the utilization of more efficient modes of system operation practically realizable. The main objective of this dissertation thesis is therefore to find a practical way how to combine the favorable properties of the advanced nonlinear and linear digital modulation techniques in a single digital modem solution, in order to increase the efficiency of the narrowband radio channel usage allocated to the new generation of the industrial LMR devices. The main attention is given to the particular areas of digital modem design such as proposal of the new family of the Nyquist filters minimizing the adjacent channel interference, design and analysis of the efficient algorithms for frequency discrimination, fast frame and symbol

The Use of Institutional Repositories: The Ohio State University Experience

In this paper the author compares the use of digital materials that have been deposited in The Ohio State University (OSU) Knowledge Bank (KB). Comparisons are made for content considered in scope of the university archives and those considered out of scope, for materials originating from different campus sources, and for different types of content. Results show that both mediated and unmediated content is used and therefore justifies the preservation costs for unmediated content. Results also show articles and undergraduate theses are most frequently used type of materials leading to the conclusion that it is important to collect content from all levels of the educational process

Electronic doctoral theses in the UK: a sector-wide survey into policies, practice and barriers to Open Access

Sharing knowledge and research outputs is critical to the progress of science and human development, and a central tenet of academia. The Internet itself is a product of the academic community, and opening access to that community’s most important body of research, doctoral theses, is both a logical and an inevitable development. Progress toward open access to electronic theses has been slow in the UK. Much has been written on the perceived barriers and practical/infrastructural considerations that might explain this, but a comprehensive picture of that progress, and obstacles to it, was lacking. In 2010, a survey of policy and practice in UK HEIs was conducted by UCL (University College London) Library Services (commissioned by the Joint Information Systems Committee, JISC) to address this very issue. Incorporating inputs from 144 institutions currently awarding doctoral degrees, the work provides the first clear and detailed picture of the status of open access to doctoral research in the UK. The mission of the UK Council for Graduate Education (UKCGE) is to promote and support the interests of graduate education, and this it does through dissemination of best practice and intelligence on emergent trends; helping to shape policy and practice for the benefit of the UK HEI sector. This report contributes to that mission by bringing to the membership’s attention the results of this important work by UCL Library Services; a collaboration between UKCGE and the authors of the original work, it sets out the policies and practices that emerged from the survey and also considers what has been learned about the perceived barriers to the implementation of open access to electronic theses. The 2010 survey has enabled, for the first time, a differentiation to be made between barriers that are “real” and those which are unfounded and/or yet to be properly validated. At the same time, the work highlights the progress made in certain critical areas, as well as those that require our greater attention. A positive picture emerges for the UK on the adoption of the electronic thesis, with the majority of HEIs surveyed expected to be providing open access to their theses in five years’ time. A more detailed picture also emerges regarding the primary reasons for requests to restrict access to theses, some of which, notably, apply only to electronic (not print) theses. This has necessarily given rise to new policy developments. There is positive evidence also of collaboration among HEIs to provide an efficient and robust service for accessing electronic theses; pooling their resources and expertise either in the development of their institutional repositories or in operating a joint service. The key driver of open access to electronic theses is the opportunity for UK HEIs to “showcase” their research outputs to the widest possible audience and enhance their impact. There are no reliable means as yet to measure this impact, but there are encouraging early indications that electronic doctoral theses attract significant attention when made openly accessible. Open access to electronic theses may therefore indeed accelerate the sharing of knowledge and the progress of scientific discovery and human development

The effect of generating interaction between scemata and text (gist) strategy on student's achievement in writing narrative text

ABSTRACT SUNITA SARI. 34.14.1.051 THE EFFECT OF GENERATING INTERACTION BETWEEN SCHEMATA AND TEXT (GIST) STRATEGY ON STUDENTS’ ACIEVEMENT IN WRITING NARRATIVE TEXT. Thesis, Medan: Department of English Education, Faculty Of Tarbiyah Science and Teachers Training, State Islamic University Of North Sumatera,Medan 2018. Keywords : GIST Strategy, Writing, Narrative text. This research was intended to find out the effect of Generating Interaction between Schemata And Text (GIST) strategy on students’ achievement writing narrative text. This research used experimental design. The population of this research was the eleventh students of MA Tahfizhil Qur’an Medan with 46 students as samples were devided into two groups, namely experimental group and control group. The experimental group was though by using Generating Interaction between Schemata And Text (GIST) strategy, while the control group taught without Generating Interaction between Schemata And Text (GIST) strategy. The instrument of the collecting the data was written test. The data were analyzed by using t-test. The calculation shows that t-observed (5,48) is higher than t-table(2.02) or t-observed > t-table ( 5,48 > 2,02) at the level of significance 0.05 with the degree of freedom (df) 44. Therefore,the null hypothesis (Ho) is rejected and alternative hypothesis (Ha) is accepted. It means that teaching writing achievement in narrative text by using Generating Interaction between Schemata And Text (GIST) strategy has more significant effect than teaching writing narrative text without using Generating Interaction between Schemata And Text (GIST) strategy

Electron Dynamics in High-Intensity Laser Fields

Access to the full-text thesis is no longer available at the author's request, due to 3rd party copyright restrictions. Access removed on 28.11.2016 by CS (TIS).Metadata merged with duplicate record (http://hdl.handle.net/10026.1/1627) on 20.12.2016 by CS (TIS).We consider electron dynamics in strong electromagnetic fields, such as those expected from the next generation of high-intensity laser facilities. Beginning with a review of constant classical fields, we demonstrate that the electron motion (as given by the Lorentz force equation) can be divided into one of four Lorentz invariant cases. Parameterising the field tensor in terms of a null tetrad, we calculate the radiative energy spectrum for an electron in crossed fields. Progressing to an infinite plane wave, we demonstrate how the electron orbit in the average rest frame changes from figure-of-eight to circular as the polarisation changes from linear to circular. To move beyond a plane wave one must resort to numerics. We therefore present a novel numerical formulation for solving the Lorentz equation. Our scheme is manifestly covariant and valid for arbitrary electromagnetic field configurations. Finally, we reconsider the case of an infinite plane wave from a strong field QED perspective. At high intensities we predict a substantial redshift of the usual kinematic Compton edge of the photon emission spectrum, caused by the large, intensity dependent effective mass of the electrons inside the laser beam. In addition, we find that the notion of a centre-of-mass frame for a given harmonic becomes intensity dependent

FAMILY AND OTHER RELATIONS A thesis examining the extent to which family relationships shape the relations of art.

Access to the full-text thesis is no longer available at the author's request, due to 3rd party copyright restrictions. Access removed on 28.11.2016 by CS (TIS).This thesis is sited in contemporary issues concerning gender and identity in relation to the arts. It aims to examine the nature of the family and the extent to which relationships and identities in the family might be analogous to the relations of fine art; these include relations between the artist and the artwork, between what is defined as 'art' and what is not, between the artwork and the viewer. It also touches on some of the other, innumerable relationships encountered in the arts: relations of materials form, feeling, thinking and making. The thesis contains a discussion of the nature of family identities and relationships based on my own experiences in the mid-twentieth century and today. Families are at first divided into two main types, nonnative and ethicaL These types represent the difference between ideal or stereotypical family relations and the way families actually live in practice. Analogies are made between normative families and traditional modes of defining art and ethical family relations and ethical notions of art. In the last chapter I suggest that relations that are core and normative are linked to marginal relations through ethical links made by liminal figures that pass between them. Although issues of identity, patriarchy and binary difference appear in theoretical writings on art criticism and practice, there appears to be little contemporary debate in these issues in relation to the family and its relationships. The thesis begins to map out the terrain of such a field of enquiry

A pre-transfer assessment framework for international technology transfer

Access to the full-text thesis is no longer available at the author's request, due to 3rd party copyright restrictions. Access removed on 29.11.2016 by CS (TIS).Metadata merged with duplicate record (http://hdl.handle.net/10026.1/405) on 20.12.2016 by CS (TIS).This is a digitised version of a thesis that was deposited in the University Library. If you are the author please contact PEARL Admin ([email protected]) to discuss options.The demands off managing in an international operating environment has changed considerably over the past 20 years due to developments in global markets. Multinational enterprises face fierce international competition and are now tasked not only with developing effective competitive capabilities but also with maximising the knowledge and expertise developed in one part of the organisation by transferring it to another. This work has investigated the position of multinational enterprises in the developing global market and through a broad and thorough review of current literature, identified a gap in the knowledge -a tool for helping the assessment of the transfer of technology prior to the transfer process taking place. Using existing models as a foundation, a new framework has been developed with observations from three case study organisations and the incorporation of other relevant literature. To -make use of the new framework to practitioners it leas been used as the basis of a workbook by which the anticipated difficulties can be judged and a priority focus developed. Validation of the `r ework has been carried out by a panel of industrialists and academics experienced in international technology transfer. The thesis concludes with a series of recommendations for further work. The originality of this work lies in the development by the author of the new pre-transfer assessment Framework. This should provide clear advantages over previous approaches and give way to improving the success of technology transfer projects