Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 945 for “"Clock"”.
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Clock distribution network techniques
Clock distribution networks are essential to synchronous systems. The design of these networks affects the system performance dramatically and sometimes determines whether the chip can function properly or not. This thesis first describes in detail how a synchronous system works. Based on the …
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Active optical clock distribution
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Development of an Accurate Clock Delay Model with Application in Clock Network Buffer Sizing
Clock network synthesis is an important stage of the Integrated Circuit (IC) design cycle. The performance of the IC highly depends on the clock network synthesis which makes this stage critical where accuracy is very important. In this thesis, a new delay model is proposed for clock networks that …
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Mechanical Seven-Segment Display Clock
Over the ages, many different styles of clocks have been designed, but the seven-segment digital display supplanted most because of its simplicity when using LEDs to illuminate each segment. This project explores how the seven-segment display could be realized in an entirely mechanical clock out of …
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A theory of clock synchronization
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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A double beam cesium clock
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1960.
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Investigating the relationship between clock gene stability and the pace of the vertebrate segmentation clock
… with waves of cycling mRNA expression of ‘clock’ genes sweeping across the PSM that are regulated by a molecular oscillator. Mathematical models suggest that sustained rapid oscillations of Notch-regulated gene transcription in the PSM depend on transient negative feedback loops that rely …
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Clock gatting for latch based design
… de reducción de potencia mas exitosas es clock-gating cuyo objetivo es reducir el consumo de potencia generado por las transiciones debidas a la señal de clk. La reducción de potencia se logra mediante la inserción de clock-gating cells (celdas de clock-gating) que impiden que la señal de …
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Analysis of the Zebrafish Segmentation Clock
… regulation in the PSM is termed the segmentation clock. Retinoic acid (RA) has been previously proposed to be a differentiation signal that acts to arrest the oscillations at the anterior of the PSM. This thesis shows the zebrafish RA catabolism mutant <i>giraffe</i> has an altered cyclic gene …
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Techniques for low jitter clock multiplication
Phase realigning clock multipliers, such as Multiplying Delay-Locked Loops (MDLL), offer significantly reduced random jitter compared to typical Phase-Locked Loops (PLL). This is achieved by introducing the reference signal directly into their voltage controlled oscillators (VCO) to realign the …
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PLL-based active optical clock distribution
Reducing the timing uncertainty associated with clock edges has become an exceedingly difficult problem as clock frequencies in high-performance processors increase past several gigahertz. Absolute quantities of skew and jitter that were insignificant at lower frequencies now consume an …
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Roles of AMPK in Drosophila circadian clock
국문요약 ⅰ 차례 ⅳ 그림 차례 ⅵ 표 차례 ⅶ Ⅰ. 서론 1 Ⅱ. 재료 및 방법 5 A. Schneider 2 (S2) 세포에서 발현시키기 위한 plasmid 5 B. S2 세포의 배양과 transfection 6 C. 형질전환 초파리 6 D. Locomotor Activity Monitoring System 8 E. 초파리 entrainment와 수확 8 F. 단백질액 추출 (lysis) 9 1. S2 세포에서 단백질액 추출 9 2. 초파리 머리에서 단백질액 추출 9 G. Immunoblotting (western …
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Clock Synchronization for Multihop Wireless Sensor Networks
… than in other types of distributed systems, clock synchronization is crucial since by having this service available, several applications such as media access protocols, object tracking, or data fusion, would improve their performance. In this dissertation, we propose a set of algorithms to …
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Clock tree synthesis under aggressive buffer insertion
In this thesis, we propose a maze-routing-based clock tree routing algorithm integrated with buffer insertion, buffer sizing, and topology generation that is able to consider general buffer insertion locations. While previous work on buffered clock tree synthesis restricts potential buffer …
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Opportunistic clock synchronization for ad hoc networks
… operations, and in rural and military settings. Clock synchronization is an essential building block for many ad hoc wireless network applications. It provides the participating computing nodes with logical clocks whose di erences can be bounded. Several traditional distributed clock …
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Cholinergic regulation of a mammalian circadian clock
A cholinergic agonist, carbachol, has been shown to shift the phase of circadian rhythms in rodents when injected intracerebroventricularly. However, the site and receptor type mediating this action have been unknown. The suprachiasmatic nuclei (SCN), the primary circadian pacemaker in mammals, …
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Clock Synchronization for Multihop Wireless Sensor Networks
… than in other types of distributed systems, clock synchronization is crucial since by having this service available, several applications such as media access protocols, object tracking, or data fusion, would improve their performance. In this dissertation, we propose a set of algorithms to …
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Ring oscillator based injection locked clock multiplier
… thesis describes a ring-based injection locked clock multiplier (ILCM) designed with the goal of generating a high-frequency and low-jitter clock. Building on prior research done on injection locking, this design uses a reference frequency doubling technique to push the noise bandwidth of the …
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On the epigenetic ageing clock in humans
Epigenetic clocks are mathematical models that predict the biological age of an organism using DNA methylation data, and which have emerged in the last few years as the most accurate biomarkers of the ageing process. However, little is known about the molecular mechanisms that control the rate of …
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