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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.
61

Měření kvality a dostupnosti GSM sítě / Quality and accessability measurement of GSM network

Vondra, Marek January 2011 (has links)
The thesis is specialized on a possibility of measuring qualities and availability of a cellular radio system and also on evaluation qualities, fruitfulness interface, permeability etc. It includes short description of a basic mobile technology. Further analysis of the possibility of measuring the mobile network and how implement the measure. It also includes a draft program for measuring and evaluation of the GSM network with help several tests by a mobile phone connected through the Bluetooth.
62

Hormone Signaling: Current Perspectives on the Roles of Salicylic Acid and Its Derivatives in Plants

Kumar, Dhirendra, Haq, Imdadul, Chapagai, Danda, Tripathi, Diwaker, Donald, David, Hossain, Mir, Devaiah, Shivakumar 14 October 2015 (has links)
Salicylic acid (SA) is an important plant hormone with a wide range of effects on plant growth and metabolism. Plants lacking SA exhibit enhanced susceptibility to pathogens. SA plays important signaling roles in resistance against biotrophic and hemi- biotrophic phytopathogens. It is synthesized in plastids along two pathways, one involving phenylalanine ammonia lyase (PAL) and the other isochorismate synthase (ICS). In Arabidopsis , during immune response most SA is synthesized through the ICS-dependent pathway, but clearly an ICS-independent pathway also exists. Several SA effector proteins have been identified and characterized which mediate downstream SA signaling. This includes SABP, a catalase, SABP2, a methyl salicylate esterase, SABP3, a carbonic anhydrase, NPR1 (nonexpressor of pathogenesis-related 1), NPR3 (a NPR1 paralog), and NPR4 (another NPR1 paralog). NPR3 and NPR4 regulate the turnover of NPR1, a process which plays a key role in activating defense gene expression. The role of SA in abiotic stress signaling is gradually becoming clearer. Various components of SA signaling in biotic stress also appear to impact abiotic stress signaling.
63

Design And Characterization Of Noveldevices For New Generation Of Electrostaticdischarge (esd) Protection Structures

Salcedo, Javier 01 January 2006 (has links)
The technology evolution and complexity of new circuit applications involve emerging reliability problems and even more sensitivity of integrated circuits (ICs) to electrostatic discharge (ESD)-induced damage. Regardless of the aggressive evolution in downscaling and subsequent improvement in applications' performance, ICs still should comply with minimum standards of ESD robustness in order to be commercially viable. Although the topic of ESD has received attention industry-wide, the design of robust protection structures and circuits remains challenging because ESD failure mechanisms continue to become more acute and design windows less flexible. The sensitivity of smaller devices, along with a limited understanding of the ESD phenomena and the resulting empirical approach to solving the problem have yielded time consuming, costly and unpredictable design procedures. As turnaround design cycles in new technologies continue to decrease, the traditional trial-and-error design strategy is no longer acceptable, and better analysis capabilities and a systematic design approach are essential to accomplish the increasingly difficult task of adequate ESD protection-circuit design. This dissertation presents a comprehensive design methodology for implementing custom on-chip ESD protection structures in different commercial technologies. First, the ESD topic in the semiconductor industry is revised, as well as ESD standards and commonly used schemes to provide ESD protection in ICs. The general ESD protection approaches are illustrated and discussed using different types of protection components and the concept of the ESD design window. The problem of implementing and assessing ESD protection structures is addressed next, starting from the general discussion of two design methods. The first ESD design method follows an experimental approach, in which design requirements are obtained via fabrication, testing and failure analysis. The second method consists of the technology computer aided design (TCAD)-assisted ESD protection design. This method incorporates numerical simulations in different stages of the ESD design process, and thus results in a more predictable and systematic ESD development strategy. Physical models considered in the device simulation are discussed and subsequently utilized in different ESD designs along this study. The implementation of new custom ESD protection devices and a further integration strategy based on the concept of the high-holding, low-voltage-trigger, silicon controlled rectifier (SCR) (HH-LVTSCR) is demonstrated for implementing ESD solutions in commercial low-voltage digital and mixed-signal applications developed using complementary metal oxide semiconductor (CMOS) and bipolar CMOS (BiCMOS) technologies. This ESD protection concept proposed in this study is also successfully incorporated for implementing a tailored ESD protection solution for an emerging CMOS-based embedded MicroElectroMechanical (MEMS) sensor system-on-a-chip (SoC) technology. Circuit applications that are required to operate at relatively large input/output (I/O) voltage, above/below the VDD/VSS core circuit power supply, introduce further complications in the development and integration of ESD protection solutions. In these applications, the I/O operating voltage can extend over one order of magnitude larger than the safe operating voltage established in advanced technologies, while the IC is also required to comply with stringent ESD robustness requirements. A practical TCAD methodology based on a process- and device- simulation is demonstrated for assessment of the device physics, and subsequent design and implementation of custom P1N1-P2N2 and coupled P1N1-P2N2//N2P3-N3P1 silicon controlled rectifier (SCR)-type devices for ESD protection in different circuit applications, including those applications operating at I/O voltage considerably above/below the VDD/VSS. Results from the TCAD simulations are compared with measurements and used for developing technology- and circuit-adapted protection structures, capable of blocking large voltages and providing versatile dual-polarity symmetric/asymmetric S-type current-voltage characteristics for high ESD protection. The design guidelines introduced in this dissertation are used to optimize and extend the ESD protection capability in existing CMOS/BiCMOS technologies, by implementing smaller and more robust single- or dual-polarity ESD protection structures within the flexibility provided in the specific fabrication process. The ESD design methodologies and characteristics of the developed protection devices are demonstrated via ESD measurements obtained from fabricated stand-alone devices and on-chip ESD protections. The superior ESD protection performance of the devices developed in this study is also successfully verified in IC applications where the standard ESD protection approaches are not suitable to meet the stringent area constraint and performance requirement.
64

Injection Locked Synchronous Oscillators (SOs) and Reference Injected Phase-Locke Loops (PLL-RIs)

Lei, Feiran 25 August 2017 (has links)
No description available.
65

Analys av Purduemodellen förnätverkssäkerhet i industriellastyrsystem inom Industri 4.0 / Analysis of the Purdue model fornetwork security in industrialcontrol systems within Industry 4.0

Blom, Oskar, Cildavil, Antonia January 2024 (has links)
I detta examensarbete analyseras Purduemodellen och dess tillämplighet inomnätverkssäkerhet för industriella styrsystem inom ramarna för Industri 4.0. Genomen litteraturstudie granskas modellens struktur och funktion i relation till de nyautmaningarna som uppkommit genom ökad digitalisering och integrering av IIoTteknologier. Studien identifierar både styrkor och svagheter i den traditionellaPurduemodellen. I resultatavsnittet introduceras en modifierad version avPurduemodellen, utformad för att förstärka nätverkssäkerheten och öka systemensförmåga att hantera cyberhot samt anpassa sig till teknologiska förändringar i denindustriella sektorn. Denna anpassning har genomförts genom införandet avytterligare säkerhetsstandarder och verktyg i syfte att förbättra modellenseffektivitet och relevans. / In this thesis, the Purdue model and its applicability within network security forindustrial control systems under the framework of Industry 4.0 are analyzed.Through a literature review, the model's structure and function are examined inrelation to the new challenges that have emerged due to increased digitization andintegration of IIoT technologies. The study identifies both strengths and weaknessesin the traditional Purdue model. In the results section, a modified version of thePurdue model is introduced, designed to enhance network security and increase thesystems' ability to handle cyber threats and adapt to technological changes in theindustrial sector. This adaptation has been achieved by incorporating additionalsecurity standards and tools aimed at improving the model's efficiency andrelevance.
66

Perspective vol. 23 no. 1 (Feb 1989)

Pitt, Clifford C., Douglas, Barbara, Leach, James, Van Dyke, Margaret, Seerveld, Calvin, Fisher, Jeremy E., Frederick, G. Marcille 28 February 1989 (has links)
No description available.
67

Perspective vol. 23 no. 1 (Feb 1989) / Perspective (Institute for Christian Studies)

Pitt, Clifford C., Douglas, Barbara, Leach, James, Van Dyke, Margaret, Seerveld, Calvin, Fisher, Jeremy E, Frederick, G. Marcille 26 March 2013 (has links)
No description available.
68

Soft Intelligence : Liquids Matter in Compliant Microsystems

Jeong, Seung Hee January 2016 (has links)
Soft matter, here, liquids and polymers, have adaptability to a surrounding geometry. They intrinsically have advantageous characteristics from a mechanical perspective, such as flowing and wetting on surrounding surfaces, giving compliant, conformal and deformable behavior. From the behavior of soft matter for heterogeneous surfaces, compliant structures can be engineered as embedded liquid microstructures or patterned liquid microsystems for emerging compliant microsystems. Recently, skin electronics and soft robotics have been initiated as potential applications that can provide soft interfaces and interactions for a human-machine interface. To meet the design parameters, developing soft material engineering aimed at tuning material properties and smart processing techniques proper to them are to be highly encouraged. As promising candidates, Ga-based liquid alloys and silicone-based elastomers have been widely applied to proof-of-concept compliant structures. In this thesis, the liquid alloy was employed as a soft and stretchable electrical and thermal conductor (resistor), interconnect and filler in an elastomer structure. Printing-based liquid alloy patterning techniques have been developed with a batch-type, parallel processing scheme. As a simple solution, tape transfer masking was combined with a liquid alloy spraying technique, which provides robust processability. Silicone elastomers could be tunable for multi-functional building blocks by liquid or liquid-like soft solid inclusions. The liquid alloy and a polymer additive were introduced to the silicone elastomer by a simple mixing process. Heterogeneous material microstructures in elastomer networks successfully changed mechanical, thermal and surface properties. To realize a compliant microsystem, these ideas have in practice been useful in designing and fabricating soft and stretchable systems. Many different designs of the microsystems have been fabricated with the developed techniques and materials, and successfully evaluated under dynamic conditions. The compliant microsystems work as basic components to build up a whole system with soft materials and a processing technology for our emerging society.
69

Instrumentation de mesure sur puce pour systèmes autotestables. Application à la mesure de bruit de phase basée sur des résonnateurs BAW

Godet, Sylvain 19 March 2010 (has links) (PDF)
Ce manuscrit présente l'intégration conjointe d'un banc de mesure de bruit de phase et de résonateurs BAW sur lesquels doit s'effectuer la mesure. Une tendance actuelle vise à intégrer à côté de systèmes plus ou moins complexes, des circuits permettant d'en faciliter les tests. L'intégration du banc de mesure de bruit de phase permet de nous affranchir des contraintes provenant de la mesure externe sous pointes et du coût élevé associé. L'intégration simultanée des circuits de tests avec les systèmes à mesurer, permet également d'exploiter pleinement les possibilités d'appariement de composants disponibles sur un même substrat. Ce type de mesure On-Chip simplifie considérablement la procédure de test, en minimisant l'utilisation de matériel de mesure externe encombrant et de coût élevé. Elle évite aussi les dispersions inhérentes à l'utilisation de composants discrets externes, offrant la possibilité de suivre facilement l'évolution des caractéristiques du système, soit dans le temps, soit après divers types de dégradations. Cette mesure intégrée conduit naturellement à la conception de circuits autotestables, et donc autoreconfigurables. Notre travail de thèse a consisté à définir l'architecture, ainsi que le dimensionnement des différents éléments du banc de mesure, en fonction de la précision de mesure souhaitée. Nous avons montrer qu'un système d'instrumentation performant peut s'intégrer dans une technologie SiGe standard.
70

State and local policy considerations for implementing the National Response Plan

Cline, John J. 03 1900 (has links)
CHDS State/Local / Approved for public release, distribution is unlimited / Threatened with the loss of federal funding for Homeland Security and emergency management preparedness programs, state and local entities must implement the National Response Plan and the National Incident Management System, which includes the Incident Command System, Unified Command, and the Multiagency Coordination System. Although mandated by Congress and implemented by Homeland Security Presidential Directive 5, underdeveloped areas of Indian country and small towns, especially farming and ranching communities and agriculturally-based counties are likely to find that they do not have the capacity to fully implement these mandated federal response programs. A theoretical terrorist-induced multistate Foot and Mouth Disease (FMD) outbreak is used to examine the impact of implementing newly established federally mandated response management programs on rural and tribal communities in agrarian states. Recovering from such an agroterrorism bioattack would require a coordinated multi-disciplinary response that is heavily dependent on local, tribal, state, and private sector personnel. However, because the United States has not experienced an outbreak of FMD since 1929, many of the skills required to quickly diagnose and respond may no longer exist. This thesis identifies potential methods for obtaining and deploying the FMD virus in a coordinated bioattack on the U.S. economy. / Director, Idaho Bureau of Disaster Services

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