Computer Controlled System for Study of Pulsed Hollow Cathode Lamps

1976 ◽  
Vol 30 (4) ◽  
pp. 415-422 ◽  
Author(s):  
E. R. Johnson ◽  
C. K. Mann ◽  
T. J. Vickers
Keyword(s):  
Hollow Cathode ◽  
Computer Control ◽  
Optimization Technique ◽  
Operating Characteristics ◽  
Surface Mapping ◽  
Controlled System ◽  
Peak Intensity ◽  
Rapid Accumulation ◽  
Computer Controlled ◽  
The One

A system for complete computer control of the important current waveform variables in the operation of pulsed hollow cathode lamps is described and characterized. The system is shown to provide a highly flexible approach for the rapid accumulation of data on lamp operating characteristics. By implementing a simplex optimization technique with the system, it is shown that a selected lamp response (average peak intensity or integrated peak intensity) can be observed as a function of one variable, while all other variables are at values which result in an optimized response. This procedure, which probably could not be carried out without a closed loop system such as that described, avoids the potential difficulties of the one-factor-at-a-time approach. Results are reported for optimization studies of two iron hollow cathode lamps, for a response surface mapping experiment, and for examination of the pulse shapes of iron, calcium, vanadium, and aluminum hollow cathode lamps.

Applications of CCEM to Environmental Health Problems

1985 ◽  
Vol 43 ◽  
pp. 102-103
Author(s):  
R. J. Lee ◽  
J. S. Walker
Keyword(s):  
Electron Microscopy ◽  
Image Analysis ◽  
Environmental Health ◽  
Computer Control ◽  
External Agent ◽  
External Agents ◽  
Computer Controlled ◽  
Primitive State ◽  
Textural Changes ◽  
General Aspects

Electron microscopy (EM), with the advent of computer control and image analysis techniques, is rapidly evolving from an interpretative science into a quantitative technique. Electron microscopy is potentially of value in two general aspects of environmental health: exposure and diagnosis.In diagnosis, electron microscopy is essentially an extension of optical microscopy. The goal is to characterize cellular changes induced by external agents. The external agent could be any foreign material, chemicals, or even stress. The use of electron microscopy as a diagnostic tool is well- developed, but computer-controlled electron microscopy (CCEM) has had only limited impact, mainly because it is fairly new and many institutions lack the resources to acquire the capability. In addition, major contributions to diagnosis will come from CCEM only when image analysis (IA) and processing algorithms are developed which allow the morphological and textural changes recognized by experienced medical practioners to be quantified. The application of IA techniques to compare cellular structure is still in a primitive state.

The new CM-Series TEMs: integration of a five-axis motorized, fully computer-controlled goniometer

1993 ◽  
Vol 51 ◽  
pp. 258-259
Author(s):  
Marc J.C. de Jong ◽  
P. Emile S.J. Asselbergs ◽  
Max T. Otten
Keyword(s):  
Mechanical Design ◽  
Computer Control ◽  
Objective Lens ◽  
Access Port ◽  
Vibration Stability ◽  
Transmission Electron ◽  
Computer Controlled ◽  
High Degree ◽  
Five Axis ◽  
Five Axes

A new step forward in Transmission Electron Microscopy has been made with the introduction of the CompuStage on the CM-series TEMs: CM120, CM200, CM200 FEG and CM300. This new goniometer has motorization on five axes (X, Y, Z, α, β), all under full computer control by a dedicated microprocessor that is in communication with the main CM processor. Positions on all five axes are read out directly - not via a system counting motor revolutions - thereby providing a high degree of accuracy. The CompuStage enters the octagonal block around the specimen through a single port, allowing the specimen stage to float freely in the vacuum between the objective-lens pole pieces, thereby improving vibration stability and freeing up one access port. Improvements in the mechanical design ensure higher stability with regard to vibration and drift. During stage movement the holder O-ring no longer slides, providing higher drift stability and positioning accuracy as well as better vacuum.

The Design of Firing Mechanism Controlling Research of Natural Gas Vehicle Cylinder

2013 ◽  
Vol 333-335 ◽  
pp. 2044-2051
Author(s):  
Wei Pu Xu ◽  
Yi Ting Liu
Keyword(s):  
Natural Gas ◽  
Data Acquisition ◽  
Wireless Network ◽  
Fire Test ◽  
General Idea ◽  
Security Risks ◽  
Controlled System ◽  
Video Systems ◽  
Computer Controlled ◽  
Natural Gas Vehicle

This article described the current situation and the security risks of the natural gas vehicle cylinders, which introduced the principle of the fire test, proposed the general idea of the fire test equipment. Wireless network, video systems, data acquisition systems and computer-controlled system of the equipment researching are also introduced.

Mean Temperature Difference Charts for Air Coolers

1983 ◽  
Vol 105 (3) ◽  
pp. 592-597 ◽  
Author(s):  
A. Pignotti ◽  
G. O. Cordero
Keyword(s):  
Heat Transfer ◽  
Heat Capacity ◽  
Temperature Difference ◽  
Optimization Technique ◽  
Independent Variables ◽  
Mean Temperature ◽  
Air Cooler ◽  
The Mean ◽  
The One ◽  
Water Ratio

Computer generated graphs are presented for the mean temperature difference in typical air cooler configurations, covering the combinations of numbers of passes and rows per pass of industrial interest. Two sets of independent variables are included in the graphs: the conventional one (heat capacity water ratio and cold fluid effectiveness), and the one required in an optimization technique of widespread use (hot fluid effectiveness and the number of heat transfer units). Flow arrangements with side-by-side and over-and-under passes, frequently found in actual practice, are discussed through examples.

scholarly journals A Python tool and database of Amtrak departure and arrival times with weather information

2021 ◽  
Author(s):  
Pipatphon Lapamonpinyo ◽  
Sybil Derrible ◽  
Francesco Corman
Keyword(s):  
United States ◽  
The United States ◽  
Operating Characteristics ◽  
Raw Data ◽  
Arrival Times ◽  
Passenger Train ◽  
Weather Information ◽  
Weather Underground ◽  
The One ◽  
Rail Station

This article proposes a Python-based Amtrak and Weather Underground (PAWU) tool to collect data on Amtrak (the main passenger train operator in the United States) departure and arrival times with weather information. In addition, this article offers a database, developed with PAWU, of the operating characteristics of 16 Amtrak routes from 2008 to 2019. More specifically, PAWU enables users to retrieve Amtrak departure and arrival times of any train number throughout the United States. It then automatically retrieves weather information from Weather Underground for each rail station and stores the data collected in a local MySQL database. Users can easily select any desired train number(s) and date range(s) without dealing with the code and the raw data from those sources that are in different formats. The database itself can be used, in part, to develop, apply, and benchmark models that assess the performance of rail services such as the one offered by Amtrak.

scholarly journals A Computer-Controlled System for Ice-Fabric Analysis on a Rigsby Stage

1988 ◽  
Vol 10 ◽  
pp. 92-94 ◽  
Author(s):  
Manfred A. Lange
Keyword(s):  
Tilt Angle ◽  
Ice Core ◽  
Data Bank ◽  
Integrated System ◽  
Controlled System ◽  
Thin Sections ◽  
Fabric Analysis ◽  
Data Files ◽  
Computer Controlled ◽  
Electronic Sensors

An integrated system for ice-fabric analysis on a Rigsby stage is described. The system consists of a regular Rigsby stage fitted with two opto-electronic sensors for assessment of azimuth and the tilt angle of each individual grain. Signals from the sensors are transmitted to a computer terminal via an interface box, which facilitates transformation of Gray-coded data to ASCII data records. The terminal is hooked up to a main-frame computer (VAX 750), where the digitized angles of the c-axis orientations of individual thin sections are stored in separate data files. These files are compatible with other already existing files containing additional ice-core data and thus become part of an extensive data bank. Appropriate software has been developed to produce, among other things, plots of c-axis orientations in a Schmidt net.

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