Optimum parameters for precision compression molding of spherical glass-lens arrays

2012 ◽  
Author(s):  
Jinghong Lu ◽  
Junhua Wang ◽  
Min Xu ◽  
Hao Zhang
Keyword(s):  
Compression Molding ◽  
Optimum Parameters ◽  
Spherical Glass ◽  
Glass Lens

scholarly journals ABOUT THE CHOICE OF THE INITIAL SIDE OF A SPHERICAL GLASS LENS PROCESSING

2021 ◽  
Vol 6 ◽  
pp. 58-66
Author(s):  
Danil A. Gurin
Keyword(s):  
Decision Making ◽  
Technological Process ◽  
Spherical Lens ◽  
Instrument Making ◽  
Spherical Glass ◽  
Glass Lens

The article analyzes the choice of the initial side of a spherical glass lens processing. The analysis was carried out on the basis of a survey of employees of the optical shop and familiarization with the description of a typical technological process for manufacturing lenses at one of the instrument-making enterprises in Novosibirsk, as well as by a retro-review of technical publications on the manufacture of optical parts. Two schemes of decision-making about the initial side of spherical lens processing are revealed: selection (assignment) or calculation by formula. The results of the analysis are formulated and the tasks of further research are defined.

A Simple and Inexpensive Clinical Whole Body Counter

1976 ◽  
Vol 15 (05) ◽  
pp. 248-253
Author(s):  
A. K. Basu ◽  
S. K. Guha ◽  
B. N. Tandon ◽  
M. M. Gupta ◽  
M. ML. Rehani
Keyword(s):  
The Body ◽  
Whole Body ◽  
Vitro Assay ◽  
Body Counter ◽  
Optimum Parameters ◽  
Whole Body Counter ◽  
Single Detector ◽  
Background Index ◽  
Iodide Crystal

SummaryThe conventional radioisotope scanner has been used as a whole body counter. The background index of the system is 10.9 counts per minute per ml of sodium iodide crystal. The sensitivity and derived sensitivity parameters have been evaluated and found to be suitable for clinical studies. The optimum parameters for a single detector at two positions above the lying subject have been obtained. It has been found that for the case of 131I measurement it is possible to assay a source located at any point in the body with coefficient of variation less than 5%. To add to the versatility, a fixed geometry for in-vitro counting of large samples has been obtained. The retention values obtained by the whole body counter have been found to correlate with those obtained by in-vitro assay of urine and stool after intravenous administration of 51Cr-albumin.

Determination of Optimum Parameters for Anaerobic Thermophilic Bacterium Injection using Commercial Simulator: Core Flooding Validation and Sensitivity

2020 ◽  
Author(s):  
A. Koto
Keyword(s):  
Oil Recovery ◽  
Simulation Experiment ◽  
Previous Experiment ◽  
Core Sample ◽  
Thermophilic Bacterium ◽  
Injection Rate ◽  
Core Flooding ◽  
Optimum Parameters ◽  
Result Show

The objective of this paper is to determine the optimum anaerobic-thermophilic bacterium injection (Microbial Enhanced Oil Recovery) parameters using commercial simulator from core flooding experiments. From the previous experiment in the laboratory, Petrotoga sp AR80 microbe and yeast extract has been injected into core sample. The result show that the experiment with the treated microbe flooding has produced more oil than the experiment that treated by brine flooding. Moreover, this microbe classified into anaerobic thermophilic bacterium due to its ability to live in 80 degC and without oxygen. So, to find the optimum parameter that affect this microbe, the simulation experiment has been conducted. The simulator that is used is CMG – STAR 2015.10. There are five scenarios that have been made to forecast the performance of microbial flooding. Each of this scenario focus on the injection rate and shut in periods. In terms of the result, the best scenario on this research can yield an oil recovery up to 55.7%.

PRESSURDIE-3

Alloy Digest ◽  
1954 ◽  
Vol 3 (3) ◽  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Compression Strength ◽  
Heat Treating ◽  
Compression Molding ◽  
Type Alloy ◽  
High Compression ◽  
Steel Industries ◽  
Class Iv

Abstract PRESSURDIE-3, developed particularly for injection and compression molding, has high compression strength, wear resistance, and corrosion resistance. It is a ASM Class IV-B type alloy. This datasheet provides information on composition and hardness. It also includes information on forming, heat treating, and machining. Filing Code: TS-19. Producer or source: Continental Copper & Steel Industries Inc..

Gallium Arsenide Integrated Circuits Decapsulation Technique Using Mixed Acid Chemistry For Die-Level Failure Analysis

2018 ◽  
Author(s):  
Harold Jeffrey M. Consigo ◽  
Ricardo S. Calanog ◽  
Melissa O. Caseria
Keyword(s):  
Gallium Arsenide ◽  
Sulfuric Acid ◽  
Nitric Acid ◽  
Integrated Circuits ◽  
Failure Analysis ◽  
Mixed Acid ◽  
Optimum Parameters ◽  
Plastic Package ◽  
Fuming Nitric Acid ◽  
Concentrated Sulfuric Acid

Abstract Gallium Arsenide (GaAs) integrated circuits have become popular these days with superior speed/power products that permit the development of systems that otherwise would have made it impossible or impractical to construct using silicon semiconductors. However, failure analysis remains to be very challenging as GaAs material is easily dissolved when it is reacted with fuming nitric acid used during standard decapsulation process. By utilizing enhanced chemical decapsulation technique with mixture of fuming nitric acid and concentrated sulfuric acid at a low temperature backed with statistical analysis, successful plastic package decapsulation happens to be reproducible mainly for die level failure analysis purposes. The paper aims to develop a chemical decapsulation process with optimum parameters needed to successfully decapsulate plastic molded GaAs integrated circuits for die level failure analysis.

Reasoning of optimum parameters of digital aerial cameras

2016 ◽  
Vol 912 (6) ◽  
pp. 49-56 ◽  
Author(s):  
S.A. Kadnichanskiy ◽  
Keyword(s):  
Optimum Parameters
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