310 research outputs found
A half-century of metal and metalloid-containing polymers
No full textAlaa S. Abd-El-Aziz ... [et al.]; Includes bibliographical references and indexes.; Editor, Alaa S. Abd-El-Aziz, is currently President of the University of Prince Edward Island.Source type: Electronic(1
Dibenzyl ferrocene-1,1′-dicarboxylate
No full textIn the title compound, [Fe(C13H11O2)2], there are markedly different orientations of the two phenylmethoxycarbonyl substituents [O—C—C—C torsion angles = 84.5 (3) and 139.6 (2)°]. These orientations are mediated by a number of intermolecular C—H...O interactions, which result in a one-dimensional hydrogen-bonded network of molecules
Ultra High-Speed Signaling and Return on Technology Investment (ROTI) for the Electrical Interconnects Sector
No full textDemand for smaller platform sizes with increasing bandwidth has driven crosstalk problems that prevent bus performance to scale with Moore’s Law. Several approaches to reduce crosstalk such as the use of shields, differential links, and equalizers have been rejected due to higher cost and power required to overcome the signal integrity impediments at Gigahertz data rates. Eigen-mode signaling based on modal decomposition techniques is the most recent method to mitigate crosstalk that can potentially satisfy the demand for higher data rates from modern technology industry.
The goal of this research is to allow maximum dense routing between packages on PCBs and to maximize bus bandwidth per unit volume for small form factors at high data rates. Crosstalk became a significant problem in interconnect designs that limit data rates and routing densities. A modal decomposition technique is an alternative approach to reduce crosstalk where each mode carries a single bit of data. Studies show this concept is capable of mitigating crosstalk with achievable dense routing and higher bandwidth. Nevertheless, the complexity of this method leads to higher cost in terms of power needed and additional circuit implementation that makes it too high to be an alternative method to replace traditional binary signaling. “Crosstalk Harnessed Signaling” (CHS) is another possible technique to reduce the complexity of modal decomposition. This technique was invented to encode data so that each bit is spread across multiple conductors such that crosstalk becomes part of the signal and can be removed during decode. A CHS concept is a possible choice to mitigate crosstalk with higher densely routing, higher bandwidth and less complexity compared to existing Eigen-mode signaling techniques.
In this research, 3D novel routing will be introduced to maximize cross-sectional density by \u3e10X and bandwidth gains of up to 31X for 4 layer matrix at DDR4 4266MT/s by implementing a CHS concept. In this proposal, the research will demonstrate the advantages of 3D CHS routing over 2D CHS routing with simulations that include performance, efficiency, speed, cost and power to maximize bandwidth per unit volume. This research will also consider other geometric configurations that can potentially increase the bandwidth per unit volume by altering trace thickness, 3D layout topologies, material properties and spacing. Cost is always a core factor to drive the acceptance of novel engineering concepts into the market. Thus, Return On Investment (ROI) studies will be part of this research and will include implementation of the CHS concept into small form factor devices, cables and connectors
Direct accounting system: improving data capture system for timely annual public accounts / Wan Azmin Wan Abd. Aziz
No full textEversince i am aware of the need of proper public accounting system for public monies, I wished I had an indepth knowledge and a reference material from which I could very quickly obtain accurate and concise information regarding the tedious preparation of Annual Public Accounts of the Malaysian Government. I have no doubt that many Malaysians have experienced this need. It is obvious that the Annual Account itself communicates no messages especially to those who have not had the advantage of learning this highly specialised field previously and practical working experience. It is my hope that this research! paper will make my dream comes true and also assist those readers who were curious enough to know the system adopted by the Government in improving data capture for preparation of Annual Public Accounts. I must concede and stress that this is, in essence, only a project paper and to those who demand a detailed exposition of the finer points of the system, may I humbly suggest that they refer to more advanced works by more eminent and di st i ngui shed author s/r esear c hers. However, I am confident that the areas covered ar& comprehensive enough to aid fellow students in their studies in this particular topic
Adapting authoritarianism: institutions and co-optation in Egypt and Syria
No full textThis PhD thesis compares Egypt and Syria’s authoritarian political systems. While the tendency in social science political research treats Egypt and Syria as similarly authoritarian, this research emphasizes differences between the two systems with special reference to institutions and co-optation. Rather than reducibly understanding Egypt and Syria as sharing similar histories, institutional arrangements, or ascribing to the oft-repeated convention that “Syria is Egypt but 10 years behind,” this thesis focuses on how events and individual histories shaped each states current institutional strengthens and weaknesses. Specifically, it explains the how varying institutional politicization or de-politicization affects each state’s capabilities for co-opting elite and non-elite individuals.
Beginning with a theoretical framework that considers the limited utility of democratization and transition theoretical approaches, the work underscores the persistence and durability of authoritarianism. Chapter two details the politicized institutional divergence between Egypt and Syria that began in the 1970s. Chapter three and four examines how institutional politicization or de-politicization affects elite and non-elite individual co-optation in Egypt and Syria. Chapter five discusses the study’s general conclusions and theoretical implications.
This thesis’s argument is that Egypt and Syria co-opt elites and non-elites differently because of the varying degrees of institutional politicization in each governance system. Rather than view one country as more politically developed than the other, this work argues that Syria’s political institutions are more politicized than their Egyptian counterparts. Syria’s political arena is, thus, described as politicized-patrimonialism. Syria’s politicized-patrimonial arena produces uneven co-optation of elites and non-elites as they are diffused through competing institutions. Conversely, the Egyptian political arena remains highly personalized as weak institutions and individuals are manipulated and molded according to the president’s ruling clique. This is referred to as personalized-patrimonialism. As a consequence, Egypt’s political establishment demonstrates more flexibility in ad hoc altering and adapting its arena depending on the emergence of crises.
This study’s theoretical implications suggest that, contrary to modernization and democratization theory’s adage that institutions lead to a political development, politicized institutions within a patrimonial order actually hinder regime adaptation because consensus is harder to achieve and maintain. It is within this context that Egypt’s de-politicized institutional framework advantages its top political elite. In this reading of Egyptian and Syrian politics, Egypt’s personalized political arena is more adaptable than Syria’s. These conclusions do not indicate that political reform is a process underway in either state
A reappraisal of attitudes to the 'People of the Book' in the Qur'an and hadith, with particular reference to Muslim fiscal policy and the covenant of 'Umar
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
Monomers, oligomers and polymers containing arenes with pendent transition metal moieties
No full textA number of synthetic routes have been utilized in the production of organometallic monomers and polymers containing arenes coordinated to the Group VI, VII and VIII transition metals. Transition metal-coordinated monomers were prepared either by nucleophilic aromatic substitution reactions of transition metal-coordinated haloarenes with phenolic compounds or via ligand exchange reactions. These monomers were polymerized directly or following removal of the metallic moieties to produce the resulting organometallic or organic polymers. Well-defined oligomeric ethers prepared via sequential nucleophilic displacement reactions were functionalized via nucleophilic addition reactions. The synthesis and characterization of heterometallic oligomers and complexes containing both neutral and cationic metallic moieties are also reviewed. The synthesis of polymers containing arenes coordinated to transition metal moieties was investigated using metal-mediated reactions. The introduction of transition metal moieties into pre-existing polymeric materials has also proven to be an effective methodology to isolate this class of organometallic polymer. Supramolecular assembly of arene complexes of transition metals was explored as a route to macromolecular materials. The use of arene complexes has allowed for the preparation of a number of polyfunctional molecules used in the design of dendrimers and star polymers
A FPGA threshold-based fall detection algorithm for elderly fall monitoring with verilog
No full textFall is one of the leading causes of accidental or unintentional injury deaths worldwide due to serious injuries such as head traumas and hip fractures. As life expectancy improved, the rapid increase in aging population implied the need for the development of vital sign detector such as fall detector to help elderly in seeking for medical attention. Immediate rescue could prevent victims from the risk of suspension trauma and reduce the mortality rate among elderly population due to fall accident effectively. This paper presents the development of FPGA-based fall detection algorithm using a threshold-based analytical method. The proposed algorithm is to minimize the rate of false positive fall detection proposed from other researchers by including the non-fall events in the data analysis. Based on the performance evaluation, the proposed algorithm successfully achieved a sensitivity of 97.45% and specificity of 97.38%. The proposed algorithm was able to differentiate fall events and non-fall events effectively, except for fast lying and fall that ending with sitting position. The proposed algorithm shows a good result and the performance of the proposed algorithm can be further improved by using an additional gyroscope to detect the posture of the lower body part
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