Results 221 to 230 of about 94,644 (264)

Nonexistence of stable currents

Annals of Global Analysis and Geometry, 1995
In the present paper the author investigates the nonexistence of stable integral currents in a compact hypersurface with positive Ricci curvature in a Euclidean space \(\mathbb{R}^{m + 1}\). Furthermore, a vanishing theorem concerning the homology group is obtained.
Qing-Ming Cheng
exaly   +3 more sources

Notes on stable currents [PDF]

Pacific Journal of Mathematics, 1975
exaly   +3 more sources

Non-Existence of Stable Currents in Hypersurfaces

Southeast Asian Bulletin of Mathematics, 2000
Let \(M\) be an \(m\)-dimensional compact hypersurface in the Euclidean space. The author studies the non-existence of stable integral \(p\)-currents in \(M\). The method is due to \textit{H. B. Lawson} and \textit{J. Simons}, Ann. Math. (2) 98, 427-450 (1973; Zbl 0283.53049)]. Related results can also be found in the reviewer's paper [Colloq. Math. 73,
exaly   +2 more sources

A stable current-to-frequency convertor

Journal of Physics E: Scientific Instruments, 1972
This note describes a current-to-frequency convertor which provides continuous integration of an analogue input signal to give a digital output suitable for input to a scaler. The extremely stable peak-point voltage of a unijunction transistor is utilized to give an output stability of less than 0.05% and a short-term equivalent voltage drift of less ...
J F Williams, B A Willis, C R Devlin
openaire   +1 more source

Ultra Stable Semiconductor Laser Current Source

Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, 2006
Life-test for high reliability laser pumps demands highly stable current sources. Telops has engineered a novel current source that meets stabilities of 200 ppm/1000 hr. This paper presents the design and assessment of performance.
Francoys Aubee, Martin Quenneville, Martin Chamberland, John Tessitore   +3 more
openaire   +1 more source

Stable Angina Pectoris: Current Medical Treatment

Current Pharmaceutical Design, 2013
Stable angina represents the main symptom of established coronary artery disease. In addition atherosclerosis is the common pathological substrate of chronic stable angina as well as acute coronary syndromes. The aim of stable angina management is the symptomatic relief and the secondary prevention.
Katerina, Siama, Dimitris, Tousoulis, Nikolaos, Papageorgiou, Gerasimos, Siasos, Eleftherios, Tsiamis, Constantinos, Bakogiannis, Alexandros, Briasoulis, Emmanuel, Androulakis, Kostas, Tentolouris, Christodoulos, Stefanadis   +9 more
openaire   +2 more sources

Stable current profile in a stellarator with shear

Nuclear Fusion, 1990
The authors have studied the stability of helical modes in a current carrying stellarator, ignoring the curvature of the axis and plasma pressure. They show that it is possible to fully stabilize a current column with a given arbitrary current value against both ideal and tearing modes by superimposing an external stellarator rotational transform with ...
M.I. Mikhajlov, V.D. Shafranov
openaire   +1 more source

Gravity currents and their interaction with stable layers

2021
This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
openaire   +1 more source

Stable source of AC voltage and current

Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510), 2004
A stable source of AC voltage up to 120 V and current up to 6 A is developed and built. The stability of the source monitored over several minutes is far under 10 ppm of full scale for voltage, current and power, and in the range of 10 ppm of full scale for voltage and current and 20 ppm of full scale for power over several hours, with the phase angle ...
Z. Mitrovic, I. Zupunski
openaire   +1 more source

Stable Current Regulator for Superconducting Solenoids

Review of Scientific Instruments, 1965
A zero to twenty-five ampere controller for use with a superconducting solenoid is described. The controller drift is less than one part in 106 per hour and the low frequency peak-to-peak noise is less than one part in 106 of the maximum current output.
openaire   +1 more source