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 385 for “"Locking"”.
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Contention Bounds for Locking Computations
… improved estimates for the completion time of locking computations under the execution trace model.
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Quantum theory of mode locking.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1971
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LOCSET phase locking : operation, diagnostics, and applications
… and experimental work recently done with the Locking of Optical Coherence via Single-detector Electronic-frequency Tagging (LOCSET) phase locking technique developed and employed here are AFRL. The primary objectives of this effort are to detail the fundamental operation of the LOCSET phase …
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STUDIES OF PERFORMANCE AND PREDICTABILITY OF CACHE-LOCKING
… time. This work studies the effects of cache-locking on performance and time predictability. Two locking methods were evaluated: a dynamic locking method and a static locking method. The performance of single and multi-core processors and multiple levels of caches were studied. The time …
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Debugging multithreaded programs that incorporate user-level locking
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Mutex Locking versus Hardware Transactional Memory: An Experimental Evaluation
… The tradeoffs between fine-grained and global locking implementations have been discussed, compared, and used in the context of fallback locks for hardware transactions. This thesis provides evidence to the effect that fine-grained locking is not critical for program performance and that in …
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Injection locking characteristics of indium arsenide quantum dash lasers
The study of injection locking characteristics was performed on an InAs Quantum Dash (QDash) semiconductor laser for the first time. The linewidth enhancement factor(α-parameter) of a QDash laser was measured using an injection locking technique that takes advantage of the asymmetry of the …
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Adaptive Multi-Granularity Locking Protocol in Object -Oriented Databases
… this study, a self-adapting multiple granularity locking protocol is developed to improve the performance throughout and increase the degree of concurrency in object-oriented databases. This is accomplished by having a concurrency control protocol having the ability to undergo modifications in the …
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Cavity filtered injection locking for large angle atomic interferometry
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2000.
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Implementation of side-fringe locking in an SHG cavity
An alternative method for locking a second-harmonic generation (SHG) cavity on resonance is described and implemented. The usual method, Pound-Drever-Hall locking, is prone to long-term power fluctuations from power variations in the incident laser. When using the second harmonic field for …
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Dual position locking joint design for a medical walker
… she is getting up. We looked at four different locking mechanisms including a spring loaded pull pin, a friction bearing, a clutch, and an electronic solenoid. After weighing the pros and cons of each mechanism we recommend and present a design using the pull pin. In order to determine the …
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Optical comb injection for optical demultiplexing and harmonic frequency locking
… on a photonic integrated circuit. By injection locking a laser to one of the lines in the optical comb (i.e, forcing a laser to lase with the frequency of that comb line), the comb line can be amplified and demultiplexed. This work investigates the physics of these active demultiplexers, both …
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Mode-locking of thulium-doped and Erbium-doped fiber lasers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Wavelength locking and determination in tunable lasers by gain voltage measurement
In this thesis, tunable lasers under optical feedback are investigated. The influence of feedback on the spectral behaviour of the voltage at the gain section, the output power, the threshold current, the linewidth and the side mode suppression ratio are investigated. The findings complement the …
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Low jitter phase-locked loop clock synthesis with wide locking range
The fast growing demand of wireless and high speed data communications has driven efforts to increase the levels of integration in many communications applications. Phase noise and timing jitter are important design considerations for these communications applications. The desire for highly complex …
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Improved HVdc dynamic performace via phase locking to virtual Thévenin voltage
An impedance-compensated phase-locked loop (IC-PLL) that synchronizes the input signal to a virtual estimate of ac network Thévenin equivalent voltage is introduced and evaluated for application in HVdc systems. As compared with the conventional Trans-vector PLL method, it is shown that the …
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Foto documental sobre las Danzas Urbanas Locking y Wacking en Lima
Among the varied range of urban dances in Lima, Locking and Wacking are some of the least known. This documentary photo diffuses through various photographs such as the dancers develop in their different contexts within Lima, and as despite economic difficulties, they manage to take advantage of …
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Interaction of stainless steel threaded fasteners with stainless steel locking inserts
… steel threaded fasteners with stainless steel locking inserts was investigated with special emphasis on high-vacuum environment applications. Nondestructive and destructive test methods were used in conjunction with information gathered from investigation with a scanning electron microscope …
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