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 116 for “"pulse duration"”.
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Concepts for Mechanistic-Empirical Design Procedure for Extended Life Hot Mix Asphalt Pavements With a Multi-Layered Structure
The load pulse duration generated by two FWDs (Dynatest and KUAB) was around 34 milliseconds. There was not a significant difference between the devices. The horizontal tensile strain pulse duration is not affected significantly by the thickness and multi-layered system of the pavements studied.
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Study of low voltage electroporation technique on hela cell treated with neolamarckia cadamba extracts daing
… Electrochemotherapy (SEFPECT) are 1000V/cm of pulse amplitude, 100μs of pulse duration, 8 numbers of pulses and 1Hz of frequency. Electrochemotherapy process causes transient burns to patient due to the intensity of pulse amplitude used, which is 1000V/cm. The use of chemotherapeutic various …
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Pulsed field separation of biomolecules in a nanofluidic filter array
In this work, pulsed electric fields are introduced as a means to enhance separation efficiency of biomolecules in a nanofluidic filter array channel. Separation under pulsed fields was tested using PBR322 DNA, Lambda Hind III DNA, and a sample containing three SDS denatured proteins. Pulsed fields …
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Experimental characterization of Cr4+:YAG passively Q-switched Cr:Nd:GSGG lasers and comparison with a simple rate equation model
… consists of measuring the energy fluence and duration of the laser pulses. The agreement of these measurements with the calculated values is then analyzed in order to understand the maximum deviation that can be expected from lasers constructed using the simple rate equation model as a design …
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Investigation of selective optical properties of Si/SiO2 nanostructures generated by pulsed laser ablation as-deposited and post-treated
… nanofibrous thin films are studied. A picosecond pulse laser was employed for indirect deposition of ablated silicon on glass substrates. Prominent parameters such as laser power, repetition rate, pulse duration, and scanning speed were changed to vary the structural and compositional properties …
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Pulse electric field effect on cervical cancer cell: a plant based anti-cancer study
… cervical cancer cell with the aid of electrical pulses or electroporation technique to investigate on the anti-cancer mechanism. Electroporation parameters utilized in this study ranging from 200V/cm, 400V/cm, 600V/cm, 800V/cm, 1000V/cm of pulse amplitude, while pulse duration ranging from 100μs, …
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Modeling of Transient Response of an Elastic Beam With Flexible Supports and Variable-Location Impact
… variable impact is numerically studied under a pulse loading. Structural stiffness, material modulus, contact stiffness, contact location, damping ratio, pulse duration, clearance and boundary conditions are investigated. A reference system is used as the basis for parameter studies and solution …
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The permanent deformation of steel portal frames subjected to impulsive loading
… strain-rate sensitivity, finite deflections and pulse duration. Experimental results are presented which show good agreement with theoretical predictions. The use of the extended Hamilton's principle for mode form solutions is discussed.
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Measurements and models of radio frequency impulsive noise inside buildings
… the form of amplitude probability distributions, pulse duration distributions, pulse spacing distributions, and noise factor distributions. Simple mathematical models of these statistical characterizations are also presented. The measurements and analyses indicate devices with electromechanical …
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Parametric amplification of mid-infrared picosecond radiation
… energy of the order of one millijoule, for pulse durations of few picoseconds and a repetition rate of 10 Hz. The radiation is tuneable in the wavelength range of 4-11 μm. The amplified energy depends on the wavelength and varies between few hundreds of microjoules to one millijoule, while …
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Femtosecond pulsed laser deposition
… investigates two variations of the conventional pulsed laser deposition (PLD) technique. The first technique is femtosecond PLD, whereby the laser used to ablate the target has a significantly higher peak intensity and shorter pulse duration as compared to conventional nanosecond lasers more …
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Investigation of porcupine bezoar extract (Hystrix Brachyuran) on hela cell combined with electroporation method
… to increase the intensity of electric field pulses that can lead to a variety of biophysical and biochemical responses. It is a molecular biology technique that stimulates pores through cell membrane, to increase the permeability of the cell, allowing chemicals, and drugs or Deoxyribonucleic …
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Approximate solution of melt depth inside titanium during laser materials processing
… well as isothermal depths given a single laser pulse. In order to assess the error associated with the adapted model, laser irradiation experiments are carried out on CP titanium samples using a focal spot of 600 μm and nitrogen gas as the shielding gas at a flow rate of 5 l/min. The effects of …
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Probabilistic design for emerging memory and nanometer-scale logic
… approach, which uses the longest write pulse duration, guarantees a successful write; however, it introduces significant energy overhead due to excessive margins since the average write pulse duration is far shorter than the worst-case pulse duration. This dissertation develops novel …
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Experimental and theoretical studies of surface and volume changes in dielectrics induced by long-pulse RF CO₂ laser irradiation
… but they have focussed mainly on ultraviolet and pulsed infrared sources. There appears to be little published data for laser irradiation of polymers with IR lasers operating with pulse durations in the range 50µs to 1ms.Laser coupling to polymers is strongly dependent on the absorption …
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Optical Actuation of MEMS Devices
… behavior of the beam when toggled by short duration laser pulses. While long duration laser pulses at a power level slightly above the toggle threshold reliably toggled the beam every time, short duration pulses of the same power toggled the beam only about two thirds of the time. In …
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Nano- and Micro-Second Electrical Pulsing of B16-F10 Mouse Melanoma Cells: Plasma Membrane and Sub-Cellular Organelle Changes
… voltage electric field application. Different pulse durations, nanosecond (ns) and microsecond (µs), and field magnitudes, 60 kV/cm and 1.2 kV/cm, were applied to mouse melanoma B16-F10 cells. Two different ns durations (60 and 300 ns) with an electric field of 60 kV/cm and microsecond duration …
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Mode-locked laser diodes for the 750 – 770 nm spectral region
Ultrashort pulse lasers are widely used in research, industry, medicine, and communications, because of their characteristics of narrow pulse width, high repetition frequency, broad spectrum and high peak power. They are influencing and changing our world. Mode-locking is an effective way to …
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Light-induced structural transition and reflectivity of a silica-gallium interface
… 1.2 µs just below melting were recorded for pump pulse duration of 0.4 µs. Thermal and non-thermal mechanisms of the reflectivity change have been identified and related to the properties of the interface.
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Development of Laboratory to Field Shift Factors for Hot-Mix Asphalt Resilient Modulus
… the resilient modulus was affected by the load pulse duration. The testing was performed at a 0.1s and 0.03s load pulses. The resilient modulus increased with the decrease of the load pulse duration at temperatures of 25°C and 40°C, while it increased at 5°C. This could be due to the difference …
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