scholarly journals Vidéodisque et disque optique numérique en documentation

2018 ◽  
Vol 31 (3) ◽  
pp. 113-118
Author(s):  
France Vinet
Keyword(s):  
Laser Disk

Depuis déjà plusieurs années, l’explosion documentaire suscite de nombreuses discussions quant à la conservation, au stockage et à l’accessibilité de l’information. La fin des années 70 a vu apparaître un nouveau mode de stockage et de repérage : le vidéodisque. Qu’il se nomme vidéodisque, disque optique ou « laser disk », ce procédé s’impose de plus en plus comme une solution permanente pour « absorber » la quantité phénoménale d’information produite ou conservée par tout organisme. L’auteure présente un profil technique des vidéodisques et des disques optiques tout en jetant un regard critique sur leur avenir dans le monde de la documentation.

Thermal management in gas cooled solid state laser disk amplifiers

1992 ◽  
Author(s):  
S. SUTTON ◽  
G. ALBRECHT ◽  
H. ROBEY ◽  
B. FREITAS
Keyword(s):  
Solid State ◽  
Thermal Management ◽  
Solid State Laser ◽  
State Laser ◽  
Laser Disk

A Laser-Disk Based Archive, Review And Communications System For Magnetic Resonance Imaging

1988 ◽  
Author(s):  
Jeffrey Cohen ◽  
Micky Brenner ◽  
Richard Staubitz ◽  
Ken Fuchs ◽  
Zami Yerushalmy ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Laser Disk ◽  
Communications System

Raman scattering temperature probe of laser disk marking

1989 ◽  
Vol 28 (9) ◽  
pp. 1685 ◽  
Author(s):  
Pui-Kwong Chan ◽  
Timothy R. Hart
Keyword(s):  
Raman Scattering ◽  
Temperature Probe ◽  
Laser Disk

scholarly journals Effectiveness of laser therapy for the treatment of lumbosacral radiculoischemias

2021 ◽  
Vol 20 (1) ◽  
pp. 50-61
Author(s):  
V. V. Andreev ◽  
S. V. Zevakhin ◽  
E. R. Barantsevich ◽  
A. I. Sychov ◽  
N. N. Petrishev
Keyword(s):  
Laser Therapy ◽  
Neuroprotective Effect ◽  
Clinical Manifestations ◽  
Pain Syndrome ◽  
Clinical Effectiveness ◽  
Intervertebral Discs ◽  
Neurological Manifestations ◽  
Low Intensity ◽  
Spinal Roots ◽  
Laser Disk

Introduction.The study was devoted to assessing the effectiveness of laser therapy in the treatment of spondylogenic radiculoischemias. Low-intensity laser therapy and vaporization technology were used.Aim – to improve treatment and outcomes in patients with compression of the spinal roots in herniated intervertebral discs using various methods of laser therapy.Materials and methods. In two groups, the results of treatment of 225 patients with clinical manifestations of spondylogenic lumbosacral radiculoischemias were analyzed using laser therapy techniques. In 115 cases (group 1), laser treatment was performed using the method of puncture polychannel laser disk decompression. In 110 patients (group 2), low-intensity percutaneous laser therapy was used. The dynamics of the clinical and neurological manifestations of the disease was recorded: the time of pain syndrome reduction, the dynamics of motor and sensory disorders of the corresponding root, changes in parameters according to the Roland-Morris and Oswestry Disability questionnaire.Results. In both groups, an improvement in clinical and neurological manifestations was obtained: the intensity of pain syndrome according to VAS decreased in more than 70 % of the observed individuals. A significant improvement in the parameters of vital activity was revealed according to scales with a long-lasting effect (more than 12 months) with an improvement in the blood supply to the spinal roots.Conclusion. Laser radiation has significant clinical effectiveness; the important parameters are the wavelength and rate of the radiation. Structural-modifying action and improvement of microcirculation (of arterial and venous bed) are achieved. Evaluation of the effectiveness of polychannel laser puncture decompression is advisable using scales and questionnaires. Low-intensity percutaneous laser therapy and monochannel interstitial laser therapy provide a targeted antiedemic and neuroprotective effect with the possibility of dosing and control. The treatment is highly effective and improves the prognosis of the disease.

Video microscopy in cell biology

1987 ◽  
Vol 45 ◽  
pp. 632-632
Author(s):  
Shinya Inoué
Keyword(s):  
Cell Biology ◽  
Random Noise ◽  
Polarized Light ◽  
Image Features ◽  
Depth Of Field ◽  
Video Enhancement ◽  
Low Light ◽  
Stereo Display ◽  
Light Levels ◽  
Laser Disk

The application of video improves the image quality and extends the applicability of the light microscope to an unprecedented degree. Rectified, Plan Apochromatic high N.A. objectives can be used at full condenser N.A. in polarized light, D.I.C., single sideband edge enhanced, brightfield, or fluorescence, etc., microscopy to yield exceptionally well-corrected images with high resolution and shallow depth of field. Contrast and image features barely visible through the ocular are clearly displayed after analog and digital video enhancement. Stationary image blemishes and random noise due to low light levels can both be removed, and either recorded- or current-dynamic images can be projected for pseudocolor, monochrome, and stereo display. Serial optical sections recorded on laser disk recorders can be played back at different through-focusing speeds, or as through-focal stereo pairs, to reveal extraordinarily fine cellular details. Several examples of such applications in cell biology will be demonstrated at the meetings.

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