Results 71 to 80 of about 21,321 (263)

Laser drilling of metals with a XeCl excimer laser [PDF]

open access: yes, 2005
This thesis is about laser drilling with a unique excimer laser with a nearly diffraction-limited beam and relatively long optical pulse duration of 175 ns.
Schoonderbeek, A.
core  

Discharge studies with a high efficiency XeCl-excimer laser [PDF]

open access: yes, 1990
Results on a high efficiency excimer laser operating according to the prepulse-mainpulsetechnique are reported. The laser volume of about 90 cm is X-ray preionized.
van Goor, F.A.   +3 more
core   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

open access: yesGeological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang   +6 more
wiley   +1 more source

Excimer Laser Three-Dimensional Micromachining Based on Image Projection and the Optical Diffraction Effect

open access: yesApplied Sciences, 2018
An excimer laser three-dimensional (3D) micromachining system is proposed based on a mask image projection method and the optical diffraction effect. The effects of optical diffraction on the laser machining rate are evaluated using a hole-arrayed mask ...
Yu-Hsuan Hung   +2 more
doaj   +1 more source

Effectiveness of a 308-nm excimer laser in treatment of vitiligo: a review [PDF]

open access: yes, 2013
Vitiligo is a relatively common acquired disorder, characterized by progressive loss of melanocytes from the epidermis and the epidermal appendages. The disease is associated with considerable morbidity because of a major impact on the quality of life ...
Onder, Meltem   +3 more
core   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

open access: yesGeological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Reaction Rate Coefficients and Adduct Formation in the Cl Atom + (E)‐CF3CF2CH=CHCF2CF3 Reaction

open access: yesInternational Journal of Chemical Kinetics, EarlyView.
ABSTRACT In this work, rate coefficients for the Cl‐atom + (E)‐CF3CF2CH═CHCF2CF3 (HFO‐153‐10mczz, F22E) gas‐phase reaction were measured as a function of temperature and pressure, k(243–323 K, 50–300 Torr), using a pulsed laser photolysis‐resonance fluorescence (PLP‐RF) technique.
Maria‐Areti I. Spanoudaki   +3 more
wiley   +1 more source

Excimer Lasers

open access: yesSPIE Proceedings, 1987
A review of excimer laser systems is presented, including basic physical data, technology, performances and applications. The last few years have seen a rapid development of this new type of gas lasers and of many commercial systems producing efficient high power pulses of ultra-violet radiation.
  +5 more sources

Influence of vacuum on the state of the pre-macular bursa in the early postoperative period after excimer laser correction in patients with myopia and myopic astigmatism

open access: yesОфтальмохирургия, 2019
Purpose. To assess the state of the posterior segment of the eye, namely, the state of the pre-macular bursa and the density of the capillary network of the retina in the early postoperative period in patients with myopia and myopic astigmatism who was ...
V. D. Antonyuk   +2 more
doaj   +1 more source

Ion Activation Methods for Top‐Down Proteomics

open access: yesMass Spectrometry Reviews, EarlyView.
ABSTRACT Mass spectrometry (MS) has emerged as a premier method used to characterize the sequences of proteins. Top‐down proteomics aims to capture the multiple sources of structural diversity reflected in proteins, such as those that arise from alternative RNA splicing events or the addition of post‐translational modifications. Tandem MS (i.e., MS/MS)
Jada N. Walker, Jennifer S. Brodbelt
wiley   +1 more source

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