Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

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.

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Construction of the Bridge over the Wilde Gera Valley, the Longest-Spanning Arch Bridge in Germany

IABSE Symposium Report ◽

10.2749/222137802796335965 ◽

2002 ◽

Vol 86 (16) ◽

pp. 66-73

Author(s):

Roland von Wölfel

Keyword(s):

Arch Bridge

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Design of the Abu Dhabi Main Gateway Arch Bridge over the Maqta Channel

IABSE Symposium Report ◽

10.2749/222137802796337530 ◽

2002 ◽

Vol 86 (1) ◽

pp. 18-27

Author(s):

Parviz Djahani ◽

John Dawson

Keyword(s):

Abu Dhabi ◽

Arch Bridge

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Overfilled Precast Concrete Arch Bridge Structures

IABSE Congress Report ◽

10.2749/222137900796298869 ◽

2000 ◽

Vol 16 (20) ◽

pp. 380-387 ◽

Cited By ~ 2

Author(s):

Joe BERNINI ◽

Neal FITZSIMONS ◽

Werner HEIERLI

Keyword(s):

Precast Concrete ◽

Arch Bridge ◽

Bridge Structures

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

Proc. Indon. Petrol. Assoc., Digital Technical Conference, 2020 ◽

10.29118/ipa20-se-530 ◽

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%.

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

10.31399/asm.cp.istfa2018p0496 ◽

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.

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