scholarly journals GRAVIRESPONSES IN PARAMECIUM CAUDATUM AND DIDINIUM NASUTUM EXAMINED UNDER VARIED HYPERGRAVITY CONDITIONS

1994 ◽  
Vol 197 (1) ◽  
pp. 271-294 ◽  
Author(s):  
R Bräucker ◽  
S Machemer-Röhnisch ◽  
H Machemer
Keyword(s):  
Gravity Field ◽  
Immobilized Cells ◽  
Video Recording ◽  
Intrinsic Rate ◽  
Linear Functions ◽  
Digital Data ◽  
Gravitational Acceleration ◽  
Paramecium Caudatum ◽  
Dependent Change ◽  
Digital Data Processing

The swimming behaviours of two species of ciliates characterized by different mechanosensory and ciliary motor properties were investigated under hypergravity up to 5.4 g. The experiments were designed to examine large numbers of cells using video recording, digital data processing and statistics for the documentation of the rates and orientations of swimming. The gravikinetic responses (change in active swimming rates) were calculated from (1) the velocities of vertical swimming in the gravity field, (2) sedimentation of Ni2+-immobilized cells and (3) the intrinsic rate of propulsion, independent of gravity. Propulsion was determined from the intersection of regression lines of the gravity-dependent upward and downward swimming velocities. The rates of swimming and sedimentation, and consequently the gravikineses, were linear functions of gravitational acceleration. Comparisons of cell populations from different cultures suggest that there is an age-dependent change in gravikinesis. In starved Paramecium caudatum (7-day cultures), the kinetic responses antagonizing sedimentation (negative gravikinesis) increased with acceleration. In Didinium nasutum, negative gravikinesis was documented at 1 g in downward-swimming specimens only, which agrees with the mechanosensory organization of this cell. Hypergravity induced the gravikinesis of Didinium to change sign. In both species, and at all accelerations tested, a neutral gravitaxis was documented. Such behaviour incorporates distinct acceleration-dependent orientational and velocity responses, keeping populations of cells stationary in the gravity field (taxis coefficients close to zero).

scholarly journals The digital data processing concepts of the LOFT mission

2014 ◽  
Author(s):  
C. Tenzer ◽  
A. Argan ◽  
A. Cros ◽  
Y. Favre ◽  
M. Gschwender ◽  
...  
Keyword(s):  
Data Processing ◽  
Digital Data ◽  
Digital Data Processing

Design, Construction, and Two Applications for an Automated Flow—Cell Polarization Fluorometer with Digital Read Out: Enzyme-Inhibitor (Antitrypsin) Assay and Antigen—Antibody (Insulin—Insulin Antiserum) Assay

1973 ◽  
Vol 19 (8) ◽  
pp. 838-844 ◽  
Author(s):  
Richard D Spencer ◽  
Fernando B Toledo ◽  
Ben T Williams ◽  
Norma L Yoss
Keyword(s):  
Fluorescence Polarization ◽  
Enzyme Inhibitor ◽  
Flow Cell ◽  
Cell Polarization ◽  
Digital Data ◽  
Multiple Components ◽  
Digital Data Processing ◽  
Fluorescence Polarization Assay ◽  
Antigen Antibody ◽  
Design Construction

Abstract We have constructed and automated a flow cell polarization fluorometer and demonstrated two specific clinical applications of fluorescence polarization assay, i.e., the enzyme-inhibitor assay of antitrypsin in serum and the antigen-antibody assay of insulin and its antibody. A signal is displayed directly and is immediately available for chart recording and (or) digital data processing. Since fluorescence polarization offers a number of choices in assay parameters and the use of different fluorescent probes, its development for rapid simultaneous measurements of multiple components in body fluids should be possible.

Microphotometer Digital Data Processing

1971 ◽  
Vol 11 ◽  
pp. 185-187
Author(s):  
J. B. Hutchings
Keyword(s):  
Data Processing ◽  
Digital Data ◽  
Digital Output ◽  
The Past ◽  
Knowing That ◽  
Important Improvement ◽  
Digital Data Processing ◽  
Programming Systems ◽  
Speed And Accuracy

In the past several years many, if not most, observatory microphotometers have been made or adapted to give digital output. At the same time, astronomers have been faced with the task of specifying exactly all the folk lore and experience necessary to reduce microphotometer output, so that the task can be performed by a computer. In addition to the speed and accuracy gains therefore, we have also been obliged to separate the subjective from the objective in this processing, and this may be the most important improvement of all.Knowing that many other observatories have developed similar programming systems, this paper presumably does not contain much that is startlingly new, but it is hoped that it may promote the exchange of ideas desirable to overcome common difficulties and avoid duplication (or multiplication) of effort.

scholarly journals Susceptibility of surface texture parameters to acquisition point clouds with digital data processing of data from optical measuring systems

2019 ◽  
Vol 252 ◽  
pp. 03020 ◽  
Author(s):  
Emilia Bachtiak-Radka ◽  
Sara Dudzińska ◽  
Daniel Grochała ◽  
Stefan Berczyński
Keyword(s):  
Data Processing ◽  
Surface Texture ◽  
Surface Characteristics ◽  
Point Clouds ◽  
Digital Processing ◽  
Digital Data ◽  
Measuring Systems ◽  
Optical Measuring ◽  
Digital Data Processing ◽  
The Impact

Digital processing of the recorded point clouds on innovative surfaces could facilitate the operator’s planning of the metrological process and give more freedom in the assessment of the surface texture. The current state of knowledge about surface characteristics, precision and quality of measurements and especially the repeatability of measurements – not only in the laboratory environment but also in the industry pose a big challenge. The paper presents research works related to the identification of the impact of the method of acquisition point clouds using digital data processing on surface texture. The main assumption of the paper was to carry out, according to the prepared plan of the experiment, the series of sample measurements with the use of the optical measuring systems AltiSurf A520 in the Laboratory of Surface Topography at the West Pomeranian University of Technology in Szczecin. The next task was to determine the impact of the digital data processing strategy in order to identify the significance of the impact (conditions and methods of filtration), which in practice largely determines the repeatability and reproducibility of the parameter values of the geometry surface structure.

scholarly journals Demand management by active consumers in intelligent electric power systems

2020 ◽  
Vol 157 ◽  
pp. 05006
Author(s):  
Evgeny Tretyakov
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Technological Process ◽  
Demand Management ◽  
Electric Power Systems ◽  
Digital Data ◽  
Practical Implementation ◽  
Processing Technologies ◽  
Digital Data Processing ◽  
Network Schedule

The approaches to demand management by active consumers through forming a given schedule of power consumption in the required period of time based on the solution of the optimization problem in the form of maximizing the power of connected controlled electric receivers of various types are presented. The model of demand management by active consumers is justified, taking into account the following factors: load sensitivity for connecting a transformer substation to a change in consumer load; load priority; consistent load reduction levels with flexible performance and power control; permissible set of electric receivers in accordance with the technological process, network schedule, other logical conditions corresponding to adjacency lists. An algorithm has been developed for limiting power on the part of active consumers based on the widespread use of digital data processing technologies, modern technical means of measurement, control and switching of end consumers in real time. The presented research results indicate the validity of the demand management method by active consumers in the normal mode of intelligent electric power systems and the possibility of its practical implementation in an industrial enterprise with reference to the technological process.

The digital data processing system of the ASTRO-E hard X-ray detector

1999 ◽  
Vol 320 (4-5) ◽  
pp. 377-377 ◽  
Author(s):  
Y. Terada ◽  
M. Tashiro ◽  
T. Takahashi ◽  
Y. Fukazawa ◽  
G. Kawaguchi ◽  
...  
Keyword(s):  
Data Processing ◽  
Processing System ◽  
Digital Data ◽  
Data Processing System ◽  
X Ray ◽  
Digital Data Processing

Time Aliasing: A Digital Data Processing Phenomenon

1983 ◽  
Vol 105 (4) ◽  
pp. 232-237 ◽  
Author(s):  
R. J. Thornhill ◽  
C. C. Smith
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Sampling Theorem ◽  
Digital Data ◽  
Frequency Resolution ◽  
Inverse Discrete Fourier Transform ◽  
Spectral Identification ◽  
Frequency Sampling ◽  
Digital Data Processing ◽  
Identification Techniques

The frequency sampling theorem is developed and interpreted for a function of frequency which was sampled either directly or indirectly by spectral identification techniques. An example of the results of time aliasing when the frequency resolution is too coarse is presented. A generalized window is developed which implements a zoom inverse discrete Fourier transform for avoiding undesirable time aliasing effects.

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