Results 251 to 260 of about 1,605,158 (279)

Preliminary evaluation of laser induced breakdown spectroscopy for slurry samples

Spectrochimica Acta Part B: Atomic Spectroscopy, 2009
Abstract Laser-induced breakdown spectroscopy (LIBS) was applied to the analysis of simulant slurry samples used in the vitrification process of liquid radioactive wastes. A spectroscopic analysis was performed by two different detection systems: Czerny-Turner spectrometer coupled with intensified diode array detector (IDAD) and an Echelle ...
Seong Yong Oh, Fang Yu Yueh, Jagdish P. Singh, Connie C. Herman, Kristine Zeigler   +4 more
openaire   +1 more source

Characteristic of preliminary breakdown preceding negative return stroke in Malaysia

2015 IEEE Conference on Energy Conversion (CENCON), 2015
This paper describes a study on the characteristics of preliminary breakdown pulses (PBPs) preceding negative return strokes. Such characterization is needed due to the lack of available data, especially for negative lightning, in Malaysia. Measurements were carried out in Johor Bahru, Malaysia in October 2014 using broadband antennas and a high ...
Chin-Leong Wooi, Zulkurnain Abdul-Malek, Noor Azlinda Ahmad, Mehrdad Mokhtari   +3 more
openaire   +1 more source

Comparison of preliminary breakdown pulses observed in Sweden and in Sri Lanka

Journal of Atmospheric and Solar-Terrestrial Physics, 1998
Abstract In this paper we have analysed breakdown pulse trains preceding the first return stroke in 47 negative cloud-to-ground (CG) lightning flashes observed in Sri Lanka (tropics) and that in 41 negative CG flashes recorded in Sweden (temperate regions). In the data obtained in Sri Lanka, breakdown pulses could be detected only in nine flashes. In
Chandima Gomes, Vernon Cooray, Chandana Jayaratne   +2 more
openaire   +1 more source

Preliminary Study on Detection of Behavioral Features at Conversation Breakdown in Human-Robot Interactions

2019 IEEE/SICE International Symposium on System Integration (SII), 2019
Communication robots are expected to help elderly people that live alone. However, it is difficult for existing conversation systems to communicate smoothly. One reason for this is that the robot cannot recognize conversation breakdowns. To solve this problem, we tried to detect human motion characteristics when conversation is not established.
Ayaka Kawamoto, Kazuyoshi Wada, Tomohiko Kitamura, Kaoto Kuroki   +3 more
openaire   +2 more sources

Tryptophan breakdown is increased in euthymic overweight individuals with bipolar disorder: a preliminary report

Bipolar Disorders, 2013
ObjectivesIndividuals with bipolar disorder (BD) are disproportionately affected by symptoms of being overweight and metabolic syndrome when compared to the general population. The pertinence of this observation is underscored by observations that excess weight is associated with a more complex illness presentation, course, and outcome in BD.
Eva Z, Reininghaus, Roger S, McIntyre, Bernd, Reininghaus, Simon, Geisler, Susanne A, Bengesser, Nina, Lackner, Karen, Hecht, Armin, Birner, Fabian, Kattnig, Renate, Unterweger, Hans-Peter, Kapfhammer, Sieglinde, Zelzer, Dietmar, Fuchs, Harald, Mangge   +13 more
openaire   +2 more sources

Spectrin breakdown products in the cerebrospinal fluid in severe head injury – preliminary observations

Acta Neurochirurgica, 2005
Calcium-induced proteolytic processes are considered key players in the progressive pathobiology of traumatic brain injury (TBI). Activation of calpain and caspases after TBI leads to the cleavage of cytoskeletal proteins such as non-erythroid alpha II-spectrin.
O, Farkas, B, Polgár, J, Szekeres-Barthó, T, Dóczi, J T, Povlishock, A, Büki   +5 more
openaire   +2 more sources

Breakdown of Chlorophyll: Partial synthesis of a putative intermediary catabolite. Preliminary communication

Helvetica Chimica Acta, 1997
AbstractThe partial synthesis of 10,22‐dihydro‐4,5‐dioxo‐4,5‐secopheophorbide a (1) from pheophorbide a methyl ester (2) is described. A regioselective, photooxygenolytic reaction of (pheophorbidato a methyl ester)cadmium(II)(3) provides the entry to the crucial 4,5‐secoporphinoid structure in form of the (10,22‐dihydro‐4,5‐dioxo‐4,5‐seco ...
Bernhard Kräutler, Walter Mühlecker, Maximilian Anderl, Benjamin Gerlach   +3 more
openaire   +1 more source

Modeling of thundercloud VHF/UHF radiation on the lightning preliminary breakdown stage

Journal of Atmospheric and Solar-Terrestrial Physics, 2008
It is well known that there are two basic parts of electromagnetic emissions from a thunderstorm cloud. The first one is due to a return stroke and the second is generated by microdischarges on the lightning preliminary stage and between successive return strokes.
M. Hayakawa, D.I. Iudin, V.Y. Trakhtengerts   +2 more
openaire   +1 more source

A Survey of Measurements and Analyses of Preliminary Breakdown Pulses in Lightning Flashes

2025 IEEE International Conference on Environment and Electrical Engineering and 2025 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
Lightning represents a major hazard to humans, buildings, electrical and electronic installations. To date, the majority of investigations have concentrated on the Return Stroke (RS) phase of the lightning flash. Nonetheless, a significant gap persists in the comprehension of RS antecedents, particularly Preliminary Breakdown (PB) pulses, which ...
Barmada, Sami, Bonfiglio, Andrea, Brignone, Massimo, Dodge, Shayan, Formisano, Alessandro, Procopio, Renato, Sekehravani, Ehsan Akbari   +6 more
openaire   +2 more sources

Comparative study on preliminary breakdown pulse trains observed in Malaysia and Florida

2010 30th International Conference on Lightning Protection (ICLP), 2010
In this paper, the preliminary breakdown pulse (PBP) trains preceding the negative first return strokes recorded using a broad band antenna system in Johor Bahru, Malaysia and Florida, United States were analyzed. In lightning flashes observed in Malaysia, the ratio between the amplitude of the largest preliminary breakdown pulse (PBP) and the peak ...
Z.A. Baharudin, Noor Azlinda Ahmad, M. Fernando, V. Cooray, J.S. Makela   +4 more
openaire   +1 more source