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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 209 for “"532"”.
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Tropospheric aerosol detection over Southern Ireland using a backscatter Raman lidar
… (PBL) height, aerosol optical density (AOD) at 532 nm and lidar ratio values. The arithmetic average of the PBL height was found to be 608 ± 138 m with a median of 615 m, while average AOD at 532 nm for clean marine air masses was 0.119 ± 0.023 and for polluted air masses was 0.170 ± 0.036. The …
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Evaluation of the Use of Raman Spectroscopic Techniques in Ink Analyses
… Raman spectra. The acid dyes were analyzed at 532 nm using NR and SERS and at 785 nm using NR. The results of the acid dye analyses indicated that there was not a single method that could generate usable spectra for all the dyes. NR at 532 nm produced the most usable spectra. The inks were …
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Laser-enhanced plasma etching of semiconductor materials
… Q-switched Nd:YAG laser was applied at its 1064, 532, and 266 nm modes. Using the 532 nm line on Si (40 mJ/cm²/pulse) with a radiofrequency inductively-coupled plasma (RF-ICP) source placed upstream, laser etch enhancement effect is 4 Å/s in 50:4 sccm Ar/SF6 and 3 Å/s etch enhancement at 50:8:2 …
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Étude de l'influence des paramètres d'ablation sur les propriétés optiques et électriques de couches minces de carbone déposées par ablation laser
… longueurs d’onde d’émission laser de 1064 nm, 532 nm et 266 nm ont subi plusieurs caractérisations. Les analyses ellipsométriques nous permettent d’estimer l’indice de réfraction complexe ainsi que l’épaisseur de nos couches. Nous constatons que la partie imaginaire de l’indice de réfraction de …
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Multiphoton ionization photoelectron spectroscopy of iodine-bearing molecules
… photoionization of I$\sb2$, CF$\sb3$I and HI at 532 nm, the scission of the R-I bond (R=I, CF$\sb3$, HI) is favored over direct ionization of the molecule at intensities in the range of 10$\sp{12}$-10$\sp{13}$W/cm$\sp2$. For the parent molecules studied, we have observed that the atomic iodine …
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Dynamics of Atmospherically Important Triatomics in Collisions with Model Organic Surfaces
… aerosols, after exposure to NO₃ and NO₂, at 532 nm and 355 nm by three aerosol analysis techniques: cavity ring-down aerosol spectroscopy (CRD-AS) at 355 nm and 532 nm, photoacoustic spectroscopy (PAS) at 532 nm, and an aerosol mass spectrometer (AMS). Heterogeneous reactions may lead to the …
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Surface enhanced Raman spectrometry of C₆₀ in an electron tunneling gap
… of C6o and study its electronic properties. The 532 nm laser source showed Raman peaks at 300,522,930-980, 1570, 1900 and 2150 cm-¹ and the 632 nm laser source showed Raman peaks at 300, 522, 930-980, 1460, and 2124 cm-¹. The device feature (gold, C₆₀, silicon or combination thereof) responsible …
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The 'lexis' of medieval computus in selected Anglo-Latin and Old English prose
… science developed from Victorius of Aquitaine’s 532-year Cursus Paschalis (c. 457), through to Dionysius Exiguus’ 95-year (5 x 19 year) Easter Table and Argumenta in the sixth century (c. 532), to Bede’s De Temporum Ratione and 532-year Circulus Paschae Magnus (Great Easter Cycle) in the eighth …
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Effects of the Implementation of a Pilot Nutrition Education Program in a Rural Appalachian County.
… a nutrition lesson plan. The subjects included 532 fourth through eighth grade students from Johnson County, a rural county in northeast Tennessee. The lesson plans and pretests and posttests were developed to be appropriate for each grade level, with increased complexity in higher grades. The …
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Zur Modellierung des Zugtragverhaltens von textilbewehrtem Beton
… part of the collaborative reserarch centre SFB 532 "Textile Reinforeced Concrete – Basics for the development of a novel technology". It is a contribution to the multi-scale (micro, meso, macro) modelling approach for Textile Reinforced Concrete that had been developed within the SFB 532. In …
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Ultraviolet (UV) Laser Implementation, Signal Model, and Measurement Sensitivities in Filtered Rayleigh Scattering for Aerodynamic Flows
… of the FRS technique has typically employed 532 nm Nd:YAG lasers coupled with the use of iodine vapor cells as the molecular filter. One method to improve the effective signal-to-noise ratio (SNR), and therefore the performance of an FRS system, is to use shorter wavelengths. This takes …
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Πολυφωτονική φασματοσκοπία του Sr-αυτοϊονιζόμενες καταστάσεις με J=3 και διπλός ιονισμός
… ionization has been observed in the range 532-541 NM. The coinsidential double resonance between the lesser radiation and the 6P and 7D Sr+ states seems to be responsible for the large width and shift of the spectral lives and also for the low light intensity value necessary to observe …
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Enhanced Rainbow Trapping in Width-graded Chirped MIM Nano-gratings for High-sensitivity Multiwavelength Bio-molecular Detection
… of 1mM aqueous phospholipid solution at 532 nm, 638 nm, and 785 nm laser illumination. The highly intense multiwavelength characteristic of these nano-grating facilitates access to weak Raman modes. We employ MIM width-graded nano-gratings as a SERS platform for the detection of propylene …
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Caractérisation des microARNS sous le contrôle de Pax-5 dans le cancer du sein
… que plusieurs miARNs, incluant miR-215-5p et miR-532-5p, sont régulés par Pax-5 dans les cellules cancéreuses du sein et que l'expression de ces miARNs dans les tumeurs de patients est associée avec celle de Pax-5. Nous démontrons également que le miR-215 réduit la capacité migratoire et …
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Photoelectric Characterization of Bacteriorhodopsin Reconstituted in Lipid Bilayer Membrane
… was present in the bilayer membrane and a 532 nm laser was used as light source. The obtained values were consistent with the reports from literature. An introduction to the generation of photocurrent by photosynthetic proteins in lipid membranes was reviewed and their applications are …
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Effects of silver nanoparticles on photochemical processes focusing on luminol chemiluminescence
… (II) chloride) complex was excited using a 532 nm laser, and the decay constant was measured. Neither gold nor silver nanoparticles showed an impact on this process. The luminol chemiluminescence was studied with an emphasis on holding the concentration of nanoparticles, surface area, and …
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Generation of fiber-coupled, nondegenerate, polarization-entangled photons for quantum communication
… downconversion of pump photons from a 532 nm continuous-wave laser to generate 798 nm signal and 1.6 tim idler photon pairs in periodically-poled, congruent lithium niobate (PPLN). Difference frequency generation of 798 nm is used for characterizing PPLN, including phase matching …
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Erfassung von Suspensionsfrachten in der arktischen Tiefsee mit optischen Methoden
… des Streulichts bei den drei Wellenlängen 532 nm, 670 nm und 785 nm erlaubt es, den spektralen Verlauf des Streukoeffizienten zu ermitteln und aus ihm den Exponenten der in natürlichen Gewässern meist hyperbolischen Teilchengrößenverteilung zu berechnen. Zusätzlich kann durch den linearen …
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Utilization of a tropospheric-stratospheric lidar system to study mountain induced gravity waves over jenny jump state forest
… northwest New Jersey. The system utilizes a 4-W 532-nm Nd:YAG laser transmitter and a 4-inch telescope receiver to collect backscattered photons from the lower atmosphere in order to observe gravity wave structure in the troposphere and stratosphere. Advances in the optics design and receiver …
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Evaluating the risk factors of dating violence among undergraduates attending a faith-based university.
… were not predictors. Overall, 56.2% (n=532) of participants reported they had engaged in a hookup relationship. The risk of experiencing dating violence increased as the hookup relationship became more intimate. Future research should identify campus culture and risk factors of dating …
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