This dissertation proposed two time-domain algorithms for extracting the broadband SPICE-compatible models of high-speed coupled interconnects. The first approach is proposed to synthesized the equivalent models of multi-conductor interconnects by cascading multiple configuration-oriented coupled transmission line (CCTL) units. The second approach focuses on the modeling of differential via based on a broadband macro-£k model with three modules represented by the optimum pole-residue forms. Using a systematic lumped-model extraction technique (SLET), all the pole-residue rational functions can transfer into a corresponding lumped model. The accuracy of the two algorithms is demonstrated both in time- and frequency -domain responses comparison with the direct 3D-FDTD simulation.

This dissertation proposed a novel time-domain algorithm for extracting the broadband SPICE-compatible models of power/ground planes with resonance effect. The time-domain algorithm approach can focus on the modeling of interconnectors and power/ground planes based on a broadband macro model. Every module of the broadband macro model is represented by the optimum pole-residue forms. Using a systematic lumped-model extraction technique, all the optimum pole-residue rational functions can be transferred into a corresponding lumped circuit model. The accuracy of the time-domain algorithms is demonstrated both in time- and frequency-domain responses comparison by the 3D-FDTD simulation and measurement. In addition, these models can be efficiently incorporated into the currently available circuit simulator such as HSpice for the consideration of power/ground bouncing noise with active devices in high-speed circuits.

Reproduction de : Thèse de doctorat : Sciences de l'ingénieur. Electronique : Metz : 1999. / 1999METZ041S.

Studien undersöker hur Spice diskuteras i facktidskrifter för socionomer och i svensk kvällspress. Medierna kombineras eftersom diskursen som förs i kvälls- respektive fackpress påverkar socialarbetare och allmänna uppfattningar om drogen och droganvändarna. Genom att använda Faircloughs kritiska diskursanalys undersöks Spicediskursens utformning och relation till andra diskurser om droger och droganvändare. Studiens syfte är att jämföra diskurserna i facktidskrifter och kvällspress samt undersöka hur Spicediskursen artikuleras. Moralpaniksperspektivet utgör en grund för studien och förankras i teorier om risksamhälle och avvikelse. Empirin baseras på sjutton artiklar från Aftonbladet, Expressen, CAN:s tidskrift Alkohol &amp; Narkotika samt Socionomen. Resultatet presenteras utifrån sex teman som uppkom under analysprocessen: Dödens drog och Spice-Epidemin, Missbrukare och behovet av hjälp, Extrema ytterligheter, Drog bortom kontroll, Kamp mot drogerna samt Spicebrukaren, inte vem som helst. Droganvändarna är underrepresenterade i diskursen där företrädesvis polis kommer till tals. Restriktiv narkotikapolitik utgör den prominenta diskurstypen. Spicediskursen skapar risk på ett sätt som kan härledas till moralpanik och konstruerar Spiceanvändaren som avvikare. Diskursen om Spice påverkar socialarbetare i deras arbete med droganvändarna. / <p>2015-06-15</p>

Total ionizing dose (TID) radiation effects modeling and simulation on digital, analog and mixed signal systems remains a significant bottle neck in the development of radiation-hardened electronics. Unverified modeling techniques and the very high computational cost with today's commercial simulation tools are among the primary hindrances to the timely hardened IC design, particularly to the design in commercially available processes. SPICE-based methods have been used for total dose radiation degradation simulations. While SPICE is effective in predicting the circuit behavior under circumstances when the electrical parameters stay constant during operation, it's not effective predicting aging behavior with gradual change with time. Behavioral modeling language, such as VHDL-AMS is needed to effectively capture the time-dependent degradation in these parameters in response to environmental stresses, such as TID radiation.This dissertation describes a method for accurate and rapid TID effect simulation of complex mixed-signal circuits. The method uses a hierarchical structure where small sub-circuits, such as voltage comparators, references, etc. are simulated using SPICE. These SPICE simulations of small circuits for multiple radiation doses are used to tune behavioral VHDL-AMS models for the sub-circuits. The created behavioral models therefore contain the electrical circuit behavior combined with the radiation response. The entire combined system is then simulated using VHDL-AMS.In a simulation experiment that was used to validate the speed and accuracy of the new method, a commercial 8-bit sub-ranging analog to digital converter netlist containing more than 2000 MOS transistors was simulated with TID models using a contemporary SPICE-based method and the new method. The new method shortened the simulation time by three orders of magnitude, while accuracy remained within reasonable limits compared to the SPICE-based method. Moreover, the automated procedures for circuit node bias monitoring, TID model replacement and result collection that are included in the simulation code of the new method decreased the "hands-on" engineering work significantly. Results from an experiment where the new TID effect simulation method was used as a hardness assurance test procedure for integrated circuits designed to be operated in radiation-harsh environments are also included in this dissertation.

Every engineer that has worked on designing an integrated circuit has to leverage an under- standing of device physics. Understanding device physics is essential when optimizing a design for speed, power, etc. These characteristics affect the bottom line when considering an integrated circuit used in a particular application. In order for there to be an under- standing of device physics, there must be a device model that is developed for a device of interest. The development of a device model often involves utilizing fundamental physical equations in a manner that is solvable by either analytical or numerical means. This typically begins by simplifying fundamental physical equations, possibly spanning multiple domains, and considering the physical quantities of interest. In order to make simplifications, assumptions about the underlying physics must be made. It is the process of transitioning from known physics laws to simplified mathematical models that a device modeler spans. This thesis will cover the device modeling aspects of a new classification of computing devices, spintronics. It will begin by stating the physical assumptions necessary for the operation of spintronic devices. Then it will go the process of deriving the underlying physical equations and stating them in a tractable form with the appropriate boundary conditions. Then these equations will be manipulated and mapped into an equivalent circuit. The equivalent circuits will them be validated against analytical solutions provided from other works. It will then finish by providing example devices that can be simulated with the develop device models, and some optimization results are proposed based off a simplified circuit model.

Konstanz, FH, Diplomarb., 2004.

Made available in DSpace on 2015-07-13T12:10:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-07-30. Added 1 bitstream(s) on 2015-07-13T12:25:35Z : No. of bitstreams: 1 000837449_20160730.pdf: 136013 bytes, checksum: 49574e22a9e757e3ebc3ea724b124dd5 (MD5) Bitstreams deleted on 2016-08-01T11:30:00Z: 000837449_20160730.pdf,. Added 1 bitstream(s) on 2016-08-01T11:30:56Z : No. of bitstreams: 1 000837449.pdf: 234638 bytes, checksum: 387573c17a92896157521148bb27d2aa (MD5) / Plantas condimentares definem espécies vegetais utilizadas para acrescentar odor ou sabor aos alimentos e está presentes na culinária humana por milhares de anos. Além do emprego na alimentação, destacam-se por apresentarem benefícios curativos e terapêuticos, apresentando atividade antiinflamatória, analgésica, antitumoral, antimicrobiana e antioxidante. Para assegurar os benefícios atribuídos a essas plantas, tornou-se importante o estudo da citotoxicidade das mesmas, considerando o risco iminente à saúde decorrente da utilização errônea e/ou abusiva de determinadas plantas condimentares, que podem ser potenciais causadores de alterações no DNA. Diante do exposto, o presente trabalho teve como objetivo avaliar o potencial citotóxico e antioxidante de Cinnamomum zeylanicum Breyn (Canela), Origanum vulgare L. (Orégano), Petrosolium sativum L. (Salsa), Piper nigrum L. (Pimenta do Reino), Zingiber officinale Roscoe (Gengibre) e Ocimum basilicum L. (Manjericão), por meio do bioensaio com Allium cepa, concluindo que nenhuma apresentou atividade citotóxica nas concentrações avaliadas. E pelos testes de DPPH, efeito quelante de Fe2+, teste FRAP, fenóis totais e flavonóides, foi demonstrado que as plantas condimentares avaliadas podem ser utilizadas como fonte de antioxidantes naturais, fenóis totais e flavonoides / Plants condiments define the species used to add odor or flavor to food and is present in human food for thousands of years. Than employment in food, stand out because they have healing and therapeutic benefits, with antiinflammatory, analgesic, antitumor, antimicrobial and antioxidant. To ensure the benefits attributed to these plants, it became important to study the cytotoxicity of the same, considering the likely health risk due to erroneous and / or misuse of certain condiments plants, which may potentially cause alterations in DNA. Given the above, the present work aimed to evaluate the cytotoxic and antioxidant potential of Cinnamomum zeylanicum Breyn (Cinnamon), Origanum vulgare (Oregano), Petrosolium sativum L. (Salsa), Piper nigrum L. (Black Pepper) Zingiber officinale Roscoe (ginger) and Ocimum basilicum L. (Basil), through bioassay with Allium cepa, concluding that showed no cytotoxicity at the concentrations evaluated. And the DPPH test, Fe2 + chelating effect, FRAP test, total phenols and flavonoids has been shown that the tested plant condiments can be used as a source of natural antioxidants, flavonoid and phenolic compounds

Master of Agribusiness / Department of Agricultural Economics / Allen M. Featherstone / The purpose of this thesis is to analyze the impact the installation of an automated packaging system would have on the predominately manual bulk packaging work centers at Wixon Inc., a privately held, integrated food and beverage developer, manufacturer, and processor. The objective of this thesis is to determine if converting to an automated system would minimize costs and increase line speeds. The owners desire a 3-year payback on the investment. In addition to the financial and economical aspects of automating the equipment, there are potential food safety and personnel safety improvements that would be brought to the firm by changing equipment. The firm’s owners want to be proactive and minimize any impact a reduction in the labor pool might see cause from the exit of workers from the Baby Boomer generation. Methods used to determine the objectives of this thesis include a comparative time study of bag filling rates, an analysis of incremental cost savings, net present value (NPV) analysis and return on investment (ROI). Data were collected from studies conducted by the engineering consulting firm of Middough Incorporated, from Wixon Inc. accounting records and, interviews of key Wixon employees. The report provided by Middough determined that the new system would be able to replace three work centers in the Bulk Packaging department based on bag fill rates and flexibility in bag sizes. This reduces the employee cost per bag. The incremental costs were analyzed using accounting records for past history. Floor space, labor costs and other integral costs were compared to determine what costsavings there may be. Cost savings were treated as cash flow. The NPV and ROI for the project used this cash flow to determine if an investment in automation is a wise one. The conclusion based on the analysis made was that, based on NPV the investment would be profitable. However, the 3-year payback of $1.5 million would not be possible under current assumptions. The automation would reduce the number of needed employees enough to absorb any reduction in the labor pool while providing increased food and employee safety.

The primary goal of this study was to investigate the awareness and prevalence of Spice and K2 usage among a population of college students, as well as the demographics of such users. The study also sought to determine whether or not students prefer these products over natural cannabis, in addition to examining the most popular methods of obtainment and the most commonly reported side effects of K2 and Spice usage. Participants consisted of 643 undergraduate students enrolled at the University of North Texas during the fall 2011 semester. Findings indicate that while students exhibit a relatively high awareness of K2 and Spice, usage of these products is not a prevalent occurrence. Implications of the findings are discussed.