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San Jose State University

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Full-Text Articles in Engineering

Santa Clara County Soft First Story Multi Unit Building Survey, Guna S. Selvaduray, S. Vukazich, J. Tran Nov 2006

Santa Clara County Soft First Story Multi Unit Building Survey, Guna S. Selvaduray, S. Vukazich, J. Tran

Faculty Publications

The objective of this survey was to provide data to emergency managers in Santa Clara County on the number of soft first-story multifamily dwellings (MFD) located in their communities using a cost-effective town-gown partnership. Target areas of cities were found by identifying areas containing residential units of two or more stories that had four or more living units. The survey found that 2,630, or 36%, of the 7,391 MFD in Santa Clara County are of the soft first-story construction type. It was found that one out of every nine apartment units in Santa Clara County is located in a soft …


Effects Of Welding Electropolished 316l Stainless Steel As Used In Ultra-Pure Fluid Delivery Systems For The Semiconductor And Pharmaceutical Industries, Guna S. Selvaduray, S. Trigwell Jan 2002

Effects Of Welding Electropolished 316l Stainless Steel As Used In Ultra-Pure Fluid Delivery Systems For The Semiconductor And Pharmaceutical Industries, Guna S. Selvaduray, S. Trigwell

Faculty Publications

In the semiconductor and pharmaceutical industries, care is taken to prevent any contribution to product contamination or corrosion from the fluid delivery systems. Electropolished 316L stainless steel has become the industry standard due to its superior corrosion resistance. However, welding of the tubing often leads to discoloration in the heat affected zone (HAZ) which can lead to corrosion. Electropolished specimens from various lots of 316L stainless steel tubing were welded under identical parameters, but with varying concentrations of oxygen leaked into the argon purge gas during the welding, simulating on-site welding conditions. Various levels of discoloration were observed in the …


Effect Of Temperature On Wetting Angle, Guna S. Selvaduray, R. Brindos Jul 1997

Effect Of Temperature On Wetting Angle, Guna S. Selvaduray, R. Brindos

Faculty Publications

No abstract provided.


Undergraduate Engineering Ceramics Laboratory Development, Guna S. Selvaduray Jan 1995

Undergraduate Engineering Ceramics Laboratory Development, Guna S. Selvaduray

Faculty Publications

No abstract provided.


Effect Of Co2 On The Processing Of Y-Ba-Cu-O Superconductors, C. Zhang, Guna S. Selvaduray Feb 1992

Effect Of Co2 On The Processing Of Y-Ba-Cu-O Superconductors, C. Zhang, Guna S. Selvaduray

Faculty Publications

The superconducting properties of YBa2Cu3O6+x reacted with various known ratios of O2/CO2 gas mixtures during sintering at different temperatures were studied. Jc was found to decrease drastically upon reaction with CO2, becoming zero at certain CO2 activities. The stability region for the 123 superconductor, as a function of CO2 activity and temperature, was empirically formulated as follows: log pCO2 < (−45,000)/T + 33.4. The grain boundaries in sintered samples with Jc = 0 were investigated with HRTEM in conjunction with EDS. Two distinct types of grain boundaries were observed. Approximately 10% of the grain boundaries were wet by a thin layer of a second phase, deduced to be BaCuO2. The remaining boundaries were sharp grain boundaries. The grain structure near the sharp grain boundaries was tetragonal. These two types of grain boundaries are thought to be responsible for Jc being zero.


Industrial Earthquake Preparedness In Shizuoka And The Role Of The Prefectural Government, Guna S. Selvaduray Feb 1985

Industrial Earthquake Preparedness In Shizuoka And The Role Of The Prefectural Government, Guna S. Selvaduray

Faculty Publications

The Shizuoka Prefectural Office in Japan plays an important role in promoting earthquake emergency preparedness among its industries. In addition to implementing regulatory requirements and enacting new regulations as necessary, the Prefectural Office also provides significant guidance to industry. This includes making publications available and periodic surveys of the status of industrial emergency preparedness. A pharmaceutical company in the prefecture has developed an impressive earthquake preparedness program and hazard reduction techniques. This program addresses both primary and secondary effects of earthquakes.


Effect Of Backup Roll Length And Roll Neck Length On Profile For 4-H Mills, T. Ohto, Guna S. Selvaduray Mar 1981

Effect Of Backup Roll Length And Roll Neck Length On Profile For 4-H Mills, T. Ohto, Guna S. Selvaduray

Faculty Publications

No abstract provided.


Proliferation Resistant Reprocessing Methods, Guna S. Selvaduray, L. Heising Nov 1979

Proliferation Resistant Reprocessing Methods, Guna S. Selvaduray, L. Heising

Faculty Publications

No abstract provided.


Finding A Site To Store Spent Fuel In The Pacific Basin, Guna S. Selvaduray, M. Goldstein, R. N. Anderson Sep 1979

Finding A Site To Store Spent Fuel In The Pacific Basin, Guna S. Selvaduray, M. Goldstein, R. N. Anderson

Faculty Publications

No abstract provided.


Separation Technologies Reviewed, Guna S. Selvaduray, R. N. Anderson, M. Goldstein Aug 1978

Separation Technologies Reviewed, Guna S. Selvaduray, R. N. Anderson, M. Goldstein

Faculty Publications

No abstract provided.