1,802 research outputs found
Agreement between the WHOQOL-BREF Taiwan Chinese and Taiwanese versions in elderly people
No full textA Lightweight Authentication Protocol for Low-Cost RFID
No full text[[abstract]]As low-cost RFIDs with limited resources will dominate most of the RFID market, it is imperative to design lightweight RFID authentication protocols for these low-cost RFIDs. However, most of existing RFID authentication protocols either suffer from some security weaknesses or require costly operations that are not available on low-cost tags. In this paper, we analyze the security vulnerabilities of a lightweight authentication protocol recently proposed by Li et al. (2006), and then propose a new lightweight protocol to improve the security and to reduce the computational cost for identifying a tag from O(n) to O(1).[[note]]SC
Cw ion lasers pumped by electron beams
Full text linkWe have obtained cw laser radiation from singly ionized Hg, I, Cd, Se, and As by exciting He metal-vapor mixtures with a dc electron beam. The beam is generated by glow discharge electron guns located apart from the active medium. This is the first time that cw ion laser action has been obtained using electron beam excitation
CW laser action in atomic fluorine
Full text linkWe have obtained CW laser action on four transitions in the doublet system of atomic fluorine for the first time. All previously reported laser action was on a pulsed basis only. CW laser radiation was obtained when F2 or AgF was used as a fluorine donor in an electron beam pumped helium plasma. A multiline output power of 200 mW was obtained
A comparison of psychometric properties of the smart balance master system and the postural assessment scale for stroke in people who have had mild stroke
No full textSC
CW silver ion laser with electron beam excitation
Full text linkA CW laser power of 140 mW was obtained in the 840.39 nm transition of Ag II by electron beam excitation. This electron beam excited metal vapor ion laser is capable of operating using metals with high vaporization temperatures and is of interest for generation of CW coherent radiation in the 220-260 nm spectral region
Initial serum glucose level as a prognostic factor in the first acute myocardial infarction
No full text
1-W cw Zn ion laser
Full text linkWe have obtained 1.2W of cw laser power on the 4911.6- and 4924.0-Å transitions of Zn II by exciting a He-Zn gas mixture with a dc glow discharge electron beam. In addition, 0.25-W output power has been obtained on the 6149.9-Å line of Hg+ using the same excitation scheme. The combination of electron beam ionization of rare gas atoms and subsequent charge transfer excitation to metal ion levels is shown to have the potential of significantly increasing the efficiency of ion lasers. cw multiwatt visible and ultraviolet ion lasers operating at efficiencies > 10-3 appear feasible using this excitation scheme
L'électrocardiographie haute résolution : mise au point et évaluation de l'effet pro-arythmique du flécaïnide chez le chien
Full text linkL'utilisation de l'électrocardiographie haute-résolution en toxicologie est envisagée avec la mise au point d'une technique de recueil sur le chien beagle. Les coefficients de variation intra et inter-jours des quatre paramètres enregistrés (QRSf, LAS40, RMS40, RMS) sont ensuite calculés. Nos résultats montrent que QRSf est plus répétable (1.1%) et reproductible (4.4%) que les autres paramètres et en particulier que LAS40 (respectivement 6.3 et 18.5%). Ces valeurs doivent être prises en compte dans l'interprétation des mesures obtenues lors d'examens successifs, car elles représentent la part de différence attribuable à la méthode et non au produit testé. Les effets du flécaïnide sont ainsi mis ici en évidence par l'allongement de QRSf et LAS40 (+54.9 et +174.6%, p<0.01) et la diminution de RMS40 et RMS (-83 et -65.1% p<0.01). Ils montrent la présence de potentiels ventriculaires tardifs, témoins des retards de conduction cardiaque produits par cet agent antiarythmique
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