Thao Nguyen - Academia.edu (original) (raw)

Papers by Thao Nguyen

Research paper thumbnail of Influence of localized latent defects on electrical breakdown of thin insulators

IEEE Transactions on Electron Devices, 1991

Electrical breakdown in thin Si02 films is measured with different techniques at different electr... more Electrical breakdown in thin Si02 films is measured with different techniques at different electric fields. It is shown that oxide reliability is affected by the presence of latent defects requiring a certain time to develop and evolve towards a destructive stage. As such a time is weakly dependent on applied fields, breakdown is not adequately detected by accelerated tests. It is also shown that, due to the localized nature of breakdown, meaningful relationships between measured parameters able to clarify the microscopic nature of oxide failure are not easy to establish.

Research paper thumbnail of A Software as a Service with Multi-tenancy Support for an Electronic Contract Management Application

In most commercial electronic contract management applications available today, different customi... more In most commercial electronic contract management applications available today, different customized code base has to be developed, deployed and operated to support each tenant. Few advanced commercial electronic contract management applications use a single code base with configuration options to support multi-tenants. However, a separate instance of the code base still has to be deployed and operated for each tenant even in these applications. The business model of having to support a single application instance for each tenant makes an electronic contract management application and other critical business applications out of reach for most small and medium businesses (SMBs), in particular, the very small businesses (SVBs) because of its high development and maintenance cost. Recently, a new business model of a single application instance supporting multi-tenancy based on software as a service (SaaS) has emerged making expensive business applications more affordable for SMBs and SVBs for multi-tenancy [1]. In this paper, we present the first of a kind multi-tenancy SaaS electronic contract management application. We also describe several novel methods used in the metadata, security and shared services, as well as customization and tenant extensions modules to support multi-tenancy SaaS in this application. This multi-tenancy SaaS application has shown to benefit both the application service providers as well as their tenants. This new multi-tenancy SaaS model can reduce the application hosting cost and make the application more affordable to the tenants because of its capabilities in customization and scalability while continuing to support an increasing number of tenants. It furthers benefits tenants by saving their money and time with immediate access to the latest IT innovations and infrastructure improvements on a single application code base. Most end users of tenants have found their productivities increased, the contract transaction time accelerated, contra- - ctual errors reduced in using this multi-tenancy SaaS electronic contract management application as demonstrated in several ongoing IBM pilot programs serving more than ten tenants with over 3000 end users.

Research paper thumbnail of An analysis of Web server performance

Abstract The Web server performance is a critical issue for sites which service a high volume of ... more Abstract The Web server performance is a critical issue for sites which service a high volume of requests. This paper examines the performance of Web servers under high CPU loads. Simulations are used in conjunction with workloads which were obtained by analyzing ...

Research paper thumbnail of XG Dynamic Spectrum Sharing Field Test Results

This paper describes the results of field testing of the XG Radio system. In August 2006, the XG ... more This paper describes the results of field testing of the XG Radio system. In August 2006, the XG Radio system was field tested at Fort A.P. Hill, Virginia, in the laboratory, and at field locations in Northern Virginia. The XG Radio system uses dynamic spectrum sharing technology to determine locally unused spectrum, and then operates on these channels without causing interference to the existing "non-cooperative" users. There were three major test criteria: To "cause no harm" (to avoid interference), to "work" (to form and maintain connected networks), and to "add value" (efficiently use spectrum). In this paper we define test metrics for fulfillment of these criteria, and describe the test results. A companion paper describes the field test design and the XG Radio system.

Research paper thumbnail of Influence of localized latent defects on electrical breakdown of thin insulators

IEEE Transactions on Electron Devices, 1991

Electrical breakdown in thin Si02 films is measured with different techniques at different electr... more Electrical breakdown in thin Si02 films is measured with different techniques at different electric fields. It is shown that oxide reliability is affected by the presence of latent defects requiring a certain time to develop and evolve towards a destructive stage. As such a time is weakly dependent on applied fields, breakdown is not adequately detected by accelerated tests. It is also shown that, due to the localized nature of breakdown, meaningful relationships between measured parameters able to clarify the microscopic nature of oxide failure are not easy to establish.

Research paper thumbnail of A Software as a Service with Multi-tenancy Support for an Electronic Contract Management Application

In most commercial electronic contract management applications available today, different customi... more In most commercial electronic contract management applications available today, different customized code base has to be developed, deployed and operated to support each tenant. Few advanced commercial electronic contract management applications use a single code base with configuration options to support multi-tenants. However, a separate instance of the code base still has to be deployed and operated for each tenant even in these applications. The business model of having to support a single application instance for each tenant makes an electronic contract management application and other critical business applications out of reach for most small and medium businesses (SMBs), in particular, the very small businesses (SVBs) because of its high development and maintenance cost. Recently, a new business model of a single application instance supporting multi-tenancy based on software as a service (SaaS) has emerged making expensive business applications more affordable for SMBs and SVBs for multi-tenancy [1]. In this paper, we present the first of a kind multi-tenancy SaaS electronic contract management application. We also describe several novel methods used in the metadata, security and shared services, as well as customization and tenant extensions modules to support multi-tenancy SaaS in this application. This multi-tenancy SaaS application has shown to benefit both the application service providers as well as their tenants. This new multi-tenancy SaaS model can reduce the application hosting cost and make the application more affordable to the tenants because of its capabilities in customization and scalability while continuing to support an increasing number of tenants. It furthers benefits tenants by saving their money and time with immediate access to the latest IT innovations and infrastructure improvements on a single application code base. Most end users of tenants have found their productivities increased, the contract transaction time accelerated, contra- - ctual errors reduced in using this multi-tenancy SaaS electronic contract management application as demonstrated in several ongoing IBM pilot programs serving more than ten tenants with over 3000 end users.

Research paper thumbnail of An analysis of Web server performance

Abstract The Web server performance is a critical issue for sites which service a high volume of ... more Abstract The Web server performance is a critical issue for sites which service a high volume of requests. This paper examines the performance of Web servers under high CPU loads. Simulations are used in conjunction with workloads which were obtained by analyzing ...

Research paper thumbnail of XG Dynamic Spectrum Sharing Field Test Results

This paper describes the results of field testing of the XG Radio system. In August 2006, the XG ... more This paper describes the results of field testing of the XG Radio system. In August 2006, the XG Radio system was field tested at Fort A.P. Hill, Virginia, in the laboratory, and at field locations in Northern Virginia. The XG Radio system uses dynamic spectrum sharing technology to determine locally unused spectrum, and then operates on these channels without causing interference to the existing "non-cooperative" users. There were three major test criteria: To "cause no harm" (to avoid interference), to "work" (to form and maintain connected networks), and to "add value" (efficiently use spectrum). In this paper we define test metrics for fulfillment of these criteria, and describe the test results. A companion paper describes the field test design and the XG Radio system.